table of content schokboekje - shipchandler, ship supply ... · 1 last revision 20-12-2006 table of...

Last revision 20-12-2006 1

Table of content

Exhaust equipment

1.1 Shock elements for exhaust systems Page 2

1.2 Shock absorbing stabilizers RD1000 Page 3

1.3 Shock absorbing stabilizers RD2000 Page 4

1.4 Shock mounting type RDS-B Page 5

Shock mountings

2.1 Shock mounting type RDS-R80 Page 6

2.2 Shock mounting type RDS-R40 Page 8

2.3 Shock mounting type RDS-C Page 9

2.4 Shock mounting type RDS-X 2

2.5 Shock mounting type RDS-XM Page 15

2.6 Shock mounting type RDS-Y Page 16

2.7 Shock mounting type RDS-J Page 17

2.8 Maintenance of the RDS-mountings Page 18

Cable mountings

3.1 Cable mountings, type A01 Page 19











Sandwich mountings

4.1 Sandwich mountings – general information Page 30

4.2 Technical data and fitting instruction Page 31

4.3 Type VRD 34 L1 Page 32

4.4 Type VRD 35 S1 Page 33

4.5 Type VRD 35 M1 Page 34

4.6 Type VRD 35 L1 Page 35

4.7 Necessary information for engineering Page 36

4.8 Maintenance Page 37

www.elektrykamorska.pl

E.S. - Last revision 19-09-2006 2

1.1 Shock elements for exhaust systems Rubber Design is one of the leading companies in the field of shock and vibration control on board naval vessels. As a provider of shock and vibration solutions, Rubber Design is continuously exploring innovative shock calculation methods, as well as developing new type of shock mountings by using finite elements computer programs. Rubber Design sets the pace for answering international military demands by designing a new generation of shock mounts, with a minimum of shock transmission and a maximum of vibration isolation. In every situation where diesel engines are used, noise and vibrations will be generated! As well through the engine foundation, engine disturbance will travel along the exhaust system to be transmitted into the vessel wherever the system is in contact with the ships structure. Rubber Design BV has the experience and solutions to control these vibration and noise emissions from the exhaust system. By flexibly mounting not only the engine but also the exhaust system, we can control most of these unwanted noise emissions. A significant reduction in the radiated noise and vibration can be achieved by introducing rubber-metal elements between the exhaust system and ship’s structure. For an explanation of how the noise reduction is achieved, the transmission speed of sound through steel and rubber needs to be understood. The transmission speed through steel is approximately 5000 m/sec. while through rubber, the transmission speed is approximately 45 to 90 m/sec. By careful design and positioning of the rubber-metal elements it is possible to obtain a reduction of 8 to 10 dB (A) across the majority of the frequency range of 63 to 4000 Hz. To give the optimum isolation, the number of mountings are kept to a minimum and positioned at strengthened locations in the ship’s structure, for example deck levels, frame webs or specially

constructed supports. Every installation takes into account the weight of the appropriate section of the system, the forces produced by ship movements and thermal expansion effects. It is equally important to ensure the frequencies, produced by any part of the exhaust system, are not the same as the frequencies caused by the engine ignition, the first order frequencies of the engine or the propeller blade frequency. Types of mounting. Two basic types of mounting are used, fixed support mountings and stabiliser mountings. The fixed support mountings absorb the static and dynamic forces and determine the direction of the expansion in the exhaust system. The stabiliser mountings allow the thermal expansion movement caused by the high temperature of the exhaust piping within the ship’s structure to be controlled. In case of horizontal piping the stabiliser mountings also carry the weight of the pipe. Thermal insulation. In order to protect the rubber against the high exhaust gas temperatures, it is necessary to install sufficient thermal insulation. It is essential to reduce the temperatures at the rubber-metal elements to less than 80°C. By using suitable insulation materials, it is possible to keep the temperature to a maximum of 50°C. It is always recommended to provide a minimum air gap of approximately 25 mm between the exhaust mounting and exhaust system. The above is applicable for the flexible fixed points, for the stabilisers the thermal insulation is attained to the length of the threaded rod.



1.2 Shock absorbing stabilizers RD1000 These stabilizers are built with components of our proven standard stabilizers, but with extra rubber discs added. The extra discs extend the maximum deflection, so the stabilizer can absorp a larger shock. Adding discs results in decreasing stiffness, combined with increased deflection.

At the moment, there are eight types available. When choosing one of them, it is recommend to let us give advice for the suspension of your exhaust gas system. When the exhaust system requires a special kind of stabilizer, Rubber Design is able to develop them. That also counts for special pipeplates, materials or any other properties.

Type Qty

discs A B C D E F G H I Max static load

45º/60º Weight

RD1004 2 x 4 150 100 116 461 115 40 10 71 M24 3.9 kN / 6.3 kN 11.2 kg RD1005 2 x 5 150 100 139 438 115 40 10 71 M24 2.9 kN / 4.9 kN 11.7 kg RD1006 2 x 6 150 100 162 415 115 40 10 71 M24 2.4 kN / 4.1 kN 12.2 kg RD1007 2 x 7 150 100 185 392 115 40 10 71 M24 2.1 kN / 3.4 kN 12.7 kg

Static load deflection characteristic

0

5

10

15

20

25

30

0 20 40 60 80 100 120Travel in mm

Forc

e in

kN RD 1004/45°

RD 1005/45°RD 1006/45°RD 1007/45°


0

10

20

30

40

50

0 50 100 150Travel in mm

Forc

e in

kN RD 1004/60°

RD 1005/60°RD 1006/60°RD 1007/60°



1.3 Shock absorbing stabilizers RD2000 These stabilizers are built with components of our proven standard stabilizers, but with extra rubber discs added. The extra discs extend the maximum deflection, so the stabilizer can absorp a larger shock. Adding discs results in decreasing stiffness, combined with increased deflection.

At the moment, there are eight types available. When choosing one of them, it is recommended to let us give advice for the suspension of your exhaust gas system. When the exhaust system requires a special kind of stabilizer, Rubber Design is able to develop them. That also counts for special pipeplates, materials or any other properties.

Type Qty discs

A B C D E F G H I J Max static load 45º/60º

Weight

RD2004 2 x 4 180 100 116 200 456 130 50 10 76 M30 5.8 kN / 15.6 kN 17.2 kg RD2005 2 x 5 180 100 139 200 433 130 50 10 76 M30 4.5 kN / 12.1 kN 18.0 kg RD2006 2 x 6 180 100 162 200 410 130 50 10 76 M30 3.6 kN / 10.7 kN 18.9 kg RD2007 2 x 7 180 100 185 200 387 130 50 10 76 M30 3.1 kN / 9.0 kN 19.7 kg


0

10

20

30

40

50

0 20 40 60 80 100 120Travel in mm

Forc

e in

kN RD 2004/45°

RD 2005/45°RD 2006/45°RD 2007/45°


0

20

40

60

80

100

120

0 20 40 60 80 100 120Travel in mm

Forc

e in

kN RD 2004/65°

RD 2005/65°RD 2006/65°RD 2007/65°



1.4 Shock mounting type RDS B This mounting is used as a semi-rigid mounting, capable for shock absorption in exhaust gas systems. The mounting, like the flexible stabilizers mentioned before, is based upon proven technology from our flexible exhaust suspension equipment. Isolation plates protect the rubber inside the mounting from high temperature

exposure. Placed in between normal vibration isolators and large displacement shock mountings, this mounting is capable of providing adequate shock protection to non-sensitive equipment, and providing good vibration isolation under harsh conditions.


0

2

4

6

8

10

12

14

16

18

0 1 2 3 4 5 6 7

Travel in mm

Forc

e in

kN

RDS-B/45°RDS-B/50°RDS-B/55°RDS-B/60°


Sh.M. - Last revision 20-12-2006 6

2.1 Shock mounting type RDS-R80 Rubber Design developed this shock mounting mainly for marine applications. This type of mounting can stand a linear shock deflection up to 80 mm. The RDS mounting is meeting the requirements of all international shock specifications such as BV 043, BV 044, MIL 901, STANAG and MOD. The shock mounting type RDS is in particular suitable for marine applications such as propulsion engines, diesel generator sets and auxiliary equipment where attenuation of low frequencies is required.

The RDS shock mounting is capable to reduce an input shock of 210 G to a transmitted shock of 6 G in a time to maximum velocity of 5 ms. The RDS shock mounting is suitable for a nominal load of 23 kN and a maximum load of 34 kN. resulting in a natural frequency of 4 Hz under maximum load. The RDS shock mounting developed by Rubber Design with a shock deflection of 80 mm gives that extra shock insulation which makes the difference. Where others with the same unloaded mounting height are restricted to 60 mm shock deflection, Rubber Design operates at 80 mm.



Technical data

Static load deflection characteristicvertical deflection

0

20

40

60

80

100

120

140

160

0 20 40 60 80

Travel in mm

Forc

e in

kN

RDS 60°

Static load deflection characteristiclateral deflection

0

10

20

30

40

50

60

70

0 10 20 30 40

Travel in mm

Forc

e in

kN

RDS 60°

Static load deflection characteristiclongitudinal deflection

0

4

8

12

16

20

0 4 8 12 16 20 24 28 32 36 40

Travel in mm

Forc

e in

kN

RDS 60°

Transfer function RDS-mount

-40,0

-30,0

-20,0

-10,0

0,0

10,0

20,0

30,0

40,0

31,5 63 125 250 500 1000 2000 4000 8000

Frequency (Hz)

Lt d

B re

f. 1k

g (1

/3 o

ctav

e ba

nd)

RDS 60°



2.2 Shock mounting type RDS-R40 Based on the principals of our RDS-R80 shock mounting, the RDS-R40 adds to the range of high quality shock absorption solutions for marine applications. The nominal load range of the RDS-R40 is placed below the RDS-R80, complementing the range of high quality anti vibration and shock products for a larger equipment range. Working principals are likewise, providing very low transmitted shock under shock loads due to the linear shock load deflection curve. The RDS-R40 works with a linear shock deflection up to 40 mm.

The combination of high shock deflection capabilities and good sound & vibration isolation features, make this mounting the ideal solution for small medium speed diesel engines of generator sets, large pump sets and other rotary equipment. Like all other RDS shock mountings, the RDS-R40 meets the requirements of all international shock specifications like, for example, BV043, BV044, MIL-STD-901, STANAG, MOD BR3021, etc.


0

10

20

30

40

50

0 2 4 6 8 10 12 14 16 18

Travel in mm

Forc

e in

kN RD SMD/45°

RD SMD/50°RD SMD/55°RD SMD/60°



2.3 Shock mounting type RDS-C General / Applications In addition to the existing RDS shock mounting range, the new RDS C-165/95, RDS C-165/126 and RDS C-250/154 provide the ideal solution for equipment protection (up to 1500 kg per mounting) like water makers, pump sets, gensets and hydro-packs, whilst also isolating the vibrations of the resiliently mounted equipment. Features The unique mounting design characteristics allows absorption of large shock displacements whilst ensuring excellent vibration isolation. The RDS C-mountings have a linear stiffness over a wide range varying from compression to extension, which is necessary to maintain the optimum isolation properties. The maximum deflection of the mounting as a result of shock impact is as large as up to 50 mm in all directions. Due to the conical round shape, the RDS-C mountings have identical stiffness characteristics in longitudinal and transverse direction. A special developed natural

rubber compound for high dynamic loads is used which ensures the best results for long lifetime of the shock mountings. The chosen metals provide a solid vulcanisation base, ensuring high quality within the RDS series. Quality control The mountings are individually tested, marked with date of production and identification number before delivery to the customers. The new RDS mountings fulfil the requirements of international shock specifications, such as BV 043, BV 044, MIL 901, STANAG, MOD etc. Dimensions The 165/95 S and H have identical dimensions, but different stiffness’s and characteristics. Likewise, the 165/126 S and H mountings share identical dimensions, but vary in stiffness and characteristics. The 250/154S is only available in ‘S’-execution.

Static load deflection characteristic RDS 165-95SCompression

0

2

4

6

8

10

0 10 20 30 40 50

Travel in mm

Forc

e in

kN

45º Sh.A55º Sh.A

S tatic load deflection characteristic R D S 165-95HC om pr e s s ion

0

2

4

6

8

10

12

0 10 20 30 40 50

Travel in m m

Forc

e in

kN

40º Sh.A45º Sh.A55º Sh.A



Technical data

Static load deflection characteristic RDS 165-126HCompression

0

2

4

6

8

10

12

14

0 10 20 30 40 50 60

Travel in mm

Forc

e in

kN

40º Sh.A45º Sh.A55º Sh.A65º Sh.A

Static load deflection characteristic RDS 165-126SCompression

0

1

2

3

4

5

6

0 10 20 30 40 50 60

Travel in mm

Forc

e in

kN 40º Sh.A



Static load deflection characteristic RDS 250-154 SCompression

0

10

20

30

40

50

60

70

80

0 10 20 30 40 50Travel in mm

Forc

e in

kN

Type S 45º

Type S 55º

Type S 65º



2.4 Shock mounting type RDS-X The type X leaf spring mounting was first introduced into the Naval Service some years ago by the MOD to isolate equipment from under water shock and to prevent vibration from equipment transferring to a ship’s structure and thus water. The present range of this type of mounting is between 10 kg to 450 kg. However, the reduction in the size and mass of ancillary equipment resulted in the addition of mass to accommodate the smallest mounting. There was therefore a requirement for a mounting of similar type but which will support smaller masses. This range of mountings was designed specifically for shipboard applications and is particularly suitable to protect marine equipment from shock due to underwater explosions. When loaded within their recommended range, RDS-X Mountings are capable of attenuating large shock inputs. They are also an effective anti-vibration mounting, having a low natural frequency. The RDS-X Mounting is made from stainless steel strip to BS 1449/302 S 25 hard cold rolled. The leaves are ‘U’ shaped and riveted or bolted together at the open ends with face plates and spacer platers to form an elliptical shaped assembly. The space between the inner and outer leaves is filled with an epoxy resin

damping compound, and the whole Mounting is coated with neoprene paint. High-impact nylon bushes and washers, with stainless steel backing washers, are provided for improved noise attenuation and load bearing. There are eight sizes for nominal loads ranging from 10 to 450 kg. Non Magnetic RDS-X Mountings. RDS-X Mountings can be manufactured for non-magnetic applications. Typical applications are for example: heavy machine tools, air compressors, engine suspensions, machine mountings, laboratory equipment, electric motors, radar communications equipment, electronic control equipment, refrigeration compressors, fuel tanks, blowers and fans, pumps etc. Note: Special care must be taken to ensure that the required clearances are provided around the equipment and the RDS-X Mountings. Precautions must also be taken to ensure that cables, pipes and other connecting services do not interfere with the functioning of the mounting, and that these connections will not themselves be damaged by motion of the equipment under shock.

2 inch

Type Nato Stock Number (NSN)

Rating

(kg)

Supported mass range

(kg)

A

(mm)

B

(mm)

C

(mm)

D

(mm)

E

(mm)

F

(mm)

Bolt Weight

(kg) 5717 5340-99-923-5717 10 9 – 18 107 114 203 51 32 23 M8 0.7 5718 5340-99-923-5718 20 18 – 35 106 114 203 51 32 23 M8 0.8 5719 5340-99-923-5719 45 35 – 55 124 133 216 51 32 26 M12 1.0 5720 5340-99-923-5720 70 55 – 90 124 133 216 51 32 26 M12 1.1 5721 5340-99-923-5721 110 90 – 135 122 133 216 51 32 26 M12 1.3

Static load deflection characteristicTension

0

500

1000

1500

2000

2500

3000

3500

4000

0 5 10 15 20 25 30 35 40 45 50Travel in mm

Forc

e in

N

10 kg20 kg45 kg70 kg110 kg

Static load deflection characteristicCompression

0

500

1000

1500

2000

2500

3000

3500

4000

0 5 10 15 20 25 30 35 40 45 50

Travel in mm

Forc

e in

kN 10 kg

20 kg45 kg70 kg110 kg



4 inch

Type Nato Stock Number (NSN)

Rating

(kg)


(kg)

A

(mm)

B

(mm)

C

(mm)

D

(mm)

E

(mm)

F

(mm)

Bolt Weight

(kg) 8429 5340-99-923-8429 180 135 – 250 185 190 297 102 64 43 M20 5.9 8428 5340-99-923-8428 320 250 – 380 186 190 297 102 64 43 M20 6.6 8427 5340-99-923-8427 450 380 – 550 184 190 297 102 64 43 M20 7.3

Static load tension characteristic

0

5

10

15

20

25

30

0 5 10 15 20 25 30 35 40 45 50 55

Travel in mm

Forc

e in

kN

180 kg320 kg450 kg

Static load compression characteristic

0

5

10

15

20

0 5 10 15 20 25 30 35 40 45 50 55 60

Travel in mm

Forc

e in

kN

180 kg320 kg450 kg



Technical details Type 5717 5718 5719 5720 5721 8429 8428 8427 Nominal load 10 20 45 70 110 180 320 450 Transmitted Acceleration V = Vertical m/s2 150 150 150 150 150 150 150 150 Hs = Horizontal Across m/s2 150 150 150 150 150 150 150 150 Hr = Vertical Across m/s2 50 50 50 50 50 50 50 50 Natural frequency and shock natural frequency (Acceleration&Deceleration)

V = Vertical Hz 6.50-8.50 6.50-8.50 7.50-8.50 6.50-8.50 7.00-8.50 9.50-13.00 8.00-9.50 7.50-9.50 Ha = Horizontal Across Hz 4.50-6.25 4.50-6.25 5.00-6.25 4.50-6.25 5.00-6.25 4.75-6.50 5.25-6.00 4.75-6.00 Hr = Vertical Across Hz 3.50-5.00 3.50-5.00 4.25-5.00 4.00-5.00 4.25-5.00 4.00-5.00 4.25-5.00 4.00-5.00 Max. shock deflection V = Vertical mm 60 60 60 60 60 60 60 60 Ha = Horizontal Across mm 40 40 40 40 40 40 40 40 Hr = Vertical Across mm 40 40 40 40 40 40 40 40 Static stiffness V = Vertical kN/m 13 26 44 70 120 350 500 875 Ha = Horizontal Across kN/m 17 35 58 91 149 665 788 1400 Hr = Vertical Across kN/m 7 14 24 39 61 175 219 385 Dynamic stiffness Hr = Vertical Across kN/m 30 58 122 150 261 891 960 1221 Hs = Horizontal Across kN/m 30 58 122 150 261 891 960 1221 Hr = Vertical Across kN/m 9 14 39 57 96 158 271 347 Dynamic factors Hr = Vertical Across 2.3 2.2 2.8 2.1 2.2 2.5 1.9 1.4 Hs = Horizontal Across 1.8 1.7 2.1 1.6 1.8 1.3 1.2 0.9 Hr = Vertical Across 1.3 1.0 1.6 1.5 1.6 0.9 1.2 0.9 Stiffness ratio н Ra = Horizontal Across 1.3 1.3 1.3 1.3 1.90 1.6 1.6 1.6 Rr = Horizontal Roll 0.55 0.55 0.55 0.55 0.55 0.50 0.45 0.45 Support stiffness kN/m 200 450 900 1300 2000 3500 6000 8500 Support strength N 150 300 675 1050 1650 2700 4800 6750



2.5 Shock mounting type RDS-XM The RDS-XM mounting is an all-metal version of the RDS-X mounting, which will maintain its properties over a wider temperature range than the RDS-X mounting. RDS-XM mountings are essentially similar to the RDS-X mountings, utilising the same leaf spring assembly, except that the epoxy resin damping compound has been replaced by stainless steel mesh inserts. Whereas the inclusion of the epoxy resin damping compound rendered the RDS-X mounting temperature sensitive (with optimum isolation efficiency at +15° to +20° C) the mesh inserts will operate over a range of –150° to +400° C with little change to the damping properties. In addition the RDS-XM has a reduction in natural frequency of the system. The RDS-X and RDS-XM are the most space efficient of all shock mountings, having originally been developed for submarines. The

elliptical leaf spring assembly enables the RDS-X and RDS-XM to have at least +/- 60mm of displacement under vertical shock conditions, within their low overall height. In addition, they have +/- 40mm of displacement to provide friction damping. Some mountings, other than leaf springs, are often employed at 45° to the vertical in an effort to equalise the stiffness in all directions. This increases the overall space envelope. The RDS-X mounting is part of the British ‘Admirality’ range of standardised mountings all NATO codified and made to Naval Engineering Standards. The RDS-XM utilises the same leaf springs and is intended to be directly interchangeable with the RDS-X mounting for extreme environmental conditions. The table below gives dimensional details of the range of RDS-XM mountings.

Type Nato Stock

Number (NSN)

Rating

(kg)


(kg)

A

(mm)

B

(mm)

C

(mm)

D

(mm)

E

(mm)

F

(mm)

Bolt Weight

(kg) Not allocated 10 9 – 18 107 114 203 51 32 23 M8 0.7 Not allocated 20 18 – 35 106 114 203 51 32 23 M8 0.8 Not allocated 45 35 – 55 124 133 216 51 32 26 M12 1.0 Not allocated 70 55 – 90 124 133 216 51 32 26 M12 1.1 Not allocated 110 90 – 135 122 133 297 51 32 26 M12 1.3 Not allocated 180 135 – 250 185 190 297 102 64 43 M20 5.9 Not allocated 320 250 – 380 186 190 297 102 64 43 M20 6.6 Not allocated 450 380 – 550 184 190 297 102 64 43 M20 7.3



2.6 Shock mountings type RDS-Y The mounting is a modified version of the type RDS-X mounting, developed by the Ministry of Defense to provide improved noise attenuation at higher frequencies. The essential improvement in noise attenuation is provided by precisely compounded rubber mouldings, forming the accelerator and decelerator units. These mouldings act as a high frequency isolator providing increased ‘stealth’ performance over the RDS-Xmounting. The RDS-Y mounting as a development of the RDS-X mounting gives similar shock but better vibration protection, compared with other mountings approved by the MOD for Naval use. Applications are similar to the RDS-X mounting with the same restricions on use applying to use in the ship’s masthead region or after 1/8th of the ship’s length. Special care must be taken to ensure that the required clearances are provided around the equipment. This is

necessary to reduce the risk of damage to motion of the mountings during shock. RDS-Y mountings have been used to reduce the vibration and noise transmitted through the ship’s hull by such equipment as refrigeration compressors, air compressors, pumps, blowers and fans, engines etc. The table below gives dimensional details of the range of RDS-Y mountings, which are based on the RDS-X mountings. There are eight load sizes with nominal loads ranging from 10 to 450 kg. These sizes fall into three groups dimensionally i.e. 10 20; 45 70 110; 180 320 450. Groups one and two are 51 mm wide with group three 102 mm wide. The RDS-Y mounting can be delivered with two types fixing kits, consisting of bolts, washers and a distance piece.

Type Nato Stock

Number (NSN)

Rating

(kg)


(kg)

A

(mm)

B

(mm)

C

(mm)

D

(mm)

Top Bolt Bottom Bolt

9769 5340-99-778-9769 10 9 – 18 124 134 203 51 M6 M8 9770 5340-99-778-9770 20 18 – 25 124 134 203 51 M6 M8 9771 5340-99-778-9771 45 35 – 55 151 166 216 51 M10 M12 9772 5430-99-778-9772 70 55 – 75 151 166 216 51 M10 M12 9773 5430-99-778-9773 110 90 – 125 151 166 297 51 M10 M12 9774 5430-99-778-9774 180 135 – 250 219 228 297 102 M16 M20 9775 5430-99-778-9775 320 250 – 385 214 228 297 102 M16 M20 9776 5430-99-778-9776 450 380 – 500 214 228 297 102 M16 M20



2.7 Shock mountings type RDS-J Suitable for shock mounting applications, where alignment with either equipment or ships structure need not be maintained after shock, and where vibration protection or isolation is not a requirement. The mounted item may be displaced from its original position by plastic yielding of the mounts as a result of shock. But it may be possible to regain shock protection, as an emergency measure, by forcing the mounts back into their original shape. The J Mount is commonly employed for the shock protection of

robust electrical distribution equipment, including switch and control gear. The J Mount is a curved metal strap designed to yield at a predetermined load in any direction under shock. The mount is self-contained, needing no separate or additional associated devices (i.e. Decelerators). It is cost effective and requires little maintenance because its zinc plated surface protects it against corrosion. The J mount is an effective shock mount, with only minor shortcomings in deflection capabilities.

J Mount ‘A’ and J Deck Mounting J Bulkhead Mounting J mounts ‘A’ Range (metric) NATO Stock Number

Mount Size No.

Mass Range (kg)

A (mm)

B (mm)

C (mm)

D (mm)

E (mm)

F (mm)

5340-99-539-6795 03A 2 - 5 151 2 55 M8 30 95 5340-99-539-6794 02A 5 - 10 152 3 55 M8 30 95 5340-99-539-6793 01A 10 - 20 153 4 55 M10 30 95 5340-99-533-2588 1A 20 - 35 154 5 70 M10 30 95 5340-99-533-2589 2A 35 - 45 154 5 90 M10 30 95 5340-99-533-2590 3A 45 - 60 155 6 85 M12 30 95 5340-99-533-2591 4A 60 - 80 155 6 105 M12 30 95 5340-99-533-2592 5A 80 - 115 157 8 95 M16 30 95 5340-99-533-2593 6A 115 - 180 159 10 85 M20 30 95 J Bulkhead mounts (metric) NATO Stock Number

Mount Size No.

Mass Range (kg)

A (mm)

B (mm)

C (mm)

D (mm)

E (mm)

F (mm)

G (mm)

H (mm)

5340-99-533-2576 1 2 - 5 69 2 55 M10 19 38 6 25 5340-99-533-2577 2 5 - 10 69 3 55 M10 19 38 6 25 5340-99-533-2578 3 10 - 20 76 4 55 M12 21 40 8 25 5340-99-533-2579 4 20 - 35 105 6 70 M16 29 49 15 32 5340-99-533-2580 5 35 - 70 125 8 90 M20 35 67 9 44 5340-99-533-2581 6 70 - 135 159 12 85 M24 44 83 11 57 J Deck mounts (Original Range - metric) NATO Stock Number

Mount Size No.

Mass Range (kg)

A (mm)

B (mm)

C (mm)

D (mm)

E (mm)

F (mm)

5340-99-533-2582 1 20 - 35 116 5 45 M10 19 64 5340-99-533-2583 2 35 - 45 116 5 55 M10 19 64 5340-99-533-2584 3 45 - 60 117 6 55 M12 19 64 5340-99-533-2585 4 60 - 80 117 6 70 M12 19 64 5340-99-533-2586 5 80 - 115 119 8 65 M16 19 64 5340-99-533-2587 6 115 - 180 121 10 65 M20 19 64



2.8 Maintenance of the RDS-Mountings • The life expectancy of the rubber elements will be

approximately 20 years in ideal circumstances. Unfortunately ideal circumstances are not feasible, therefore the (working) life expectancy will be approx. 10 years. The life expectancy of the rubber elements is dependent on the environmental circumstances (weather influences, contaminants, etc).

• A visual inspection of the RDS-Mountings should be carried

out six months after installation and should be repeated every year. For better recognition of damages you can use a blunt pin. The use of a screwdriver is not advisable, because of the damage it can cause to the conical mountings.

• The use of a natural rubber (NR) compound for the rubber

elements means that they are not oil resistant. The occasional occurrence of oil-leaks does not effect the working of the conical mountings, because the oil will only damage the surface of the rubber elements. In case of oil contamination the rubber elements will show some signs of swelling.

• When cleaning the engine or the engine room with a solvent

cleansing agent, it is advisable to cover up the RDS-Mountings. If the cleansing agent still contaminates the rubber elements, they should be cleaned als follows.

• Storage, cleaning and maintenance of the rubber elements

should be done in accordance with DIN 7716. The cleaning of the RDS-Mountings should be done with a normal (household) cleansing agent. It is also advisable to use a glycerine-alcohol mixture (1:10). Do not use a solvent cleansing agent.

• In cases where it is necessary to replace the RDS-Mounting,

we advise return of the RDS-Mounting to Rubber Design BV. • If required, the RDS-mounting can be painted by the

customer, Be aware that only the top- and base plate of the RDS-Mounting can be painted. Do not use paint on the rubber element as the rubber element might be contaminated and therefore be damaged.

• All deliveries are stored for over 20 years in a database

including all relevant data and characteristics.


C.M. - Last revision 20-12-2006

RD CABLE MOUNTINGS Combined all-metal multidirectional anti-vibration and

antishock mountings.

• No aging

• Corrosion resistant

• Highly inherent damping

• Very low amplification at resonance

• Severe shock attenuation

• Wide temperature range (-180°C to +300)

• Maintenance free

Typical applications:

• Resilient Suspensions meeting Military Standards

• Isolation of Sensitive Electronic Equipment

• Isolation of Generators, Pumps and Compressors

• Exhaust System suspension

• Isolation of Cabinets, Containers etc.

• Protection of Equipment during Transport

• Extreme Temperature Application

Load mode: Compression Typical load range: 1.5 – 5 kg

Cable mounting type number

Rated load at 10 Hz

(kg)

Max. static load (kg)

Max. dyn. Travel (mm)

A015080-033 2.2 2.3 22 A015080-030 2.7 2.7 19 A015080-025 3.6 (12 Hz) 3.6 15 A015080-020 4.0 (14 Hz) 4.2 10 A015080-018 5.3 (15 Hz) 5.3 9 Load mode: 45° Compression/roll Typical load range: 1 – 3.5 kg Cable mounting type number

Rated load at 10 Hz

(kg)



A015080-033 1.4 1.7 31 A015080-030 1.7 1.9 27 A015080-025 2.6 2.6 21 A015080-020 3.0 (12 Hz) 3.0 15 A015080-018 3.7 (13 Hz) 3.7 12

Load mode: Shear and roll Typical load range: 0.25 – 1.5 kg


Rated load at 12 Hz

(kg)



A015080-033 0.35 1.0 23 A015080-030 0.45 1.2 20 A015080-025 0.75 1.5 16 A015080-020 1.25 1.8 11 A015080-018 2.05 2.2 9

The number of wire loops can be less than 10, f. inst. 4, 6 or 8, whereat the load range is correspondingly reduced. Cable mounting type number

Height (H) (mm)

Width (W) (mm)

Mass (kg)

A015080-033 33 38 0.025 A015080-030 30 35 0.025 A015080-025 25 30 0.02 A015080-020 20 28 0.02 A015080-018 18 25 0.02

19

Standard materials (other qualities on request) Wire rope and threaded inserts: Steel AISI 316 Bars: Aluminium 6060-T6 Finish: Chromated

1.1 SERIES A01

Fixture holes

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Through holes 4.8 mm II IY IM

Through holes countersunk IY YY YM

Inserts M4 IM YM MM

Each cable mount has six alternative configurations with regard to fixture holes (ref. table to the left). When ordering, make your choice and add the hole configuration code to the type number. Example: A015080-033-YY

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• No aging















Load mode: Compression Typical load range: 4 – 12 kg


Rated load at 10 Hz

(kg)



A025112-038 5.6 6.0 23 A025112-033 8.3 8.3 18 A025112-028 10.9 (14 Hz) 10.9 14 A025112-025 12.5 (14 Hz) 12.5 11 A025112-023 13.8 (15 Hz) 13.8 9 Load mode: 45° Compression/roll Typical load range: 3 – 10 kg


Rated load at 10 Hz

(kg)



A025112-038 3.4 4.3 32 A025112-033 4.8 5.4 26 A025112-028 7.3 7.3 19 A025112-025 8.8 (11 Hz) 8.8 16 A025112-023 10.3 (12 Hz) 10.3 13

Load mode: Shear and roll Typical load range: 0.6 – 4 kg


Rated load at 12 Hz

(kg)



A025112-038 0.8 2.6 24 A025112-033 1.3 3.2 19 A025112-028 2.3 4.2 14 A025112-025 3.7 5.1 12 A025112-023 5.4 5.8 10


Height (H) (mm)

Width (W) (mm)

Mass (kg)

A025112-038 38 43 0.07 A025112-033 33 38 0.06 A025112-028 28 33 0.06 A025112-025 25 30 0.055 A025112-023 23 28 0.055

20


1.2 SERIES A02

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Inserts M5 IM YM MM

Each cable mount has six alternative configurations with regard to fixture holes (ref. table to the left). When ordering, make your choice and add the code to the type number. Example: A015080-033-YY

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• No aging

















Rated load at 10 Hz

(kg)



A030127-044 12.5 13.5 24 A030127-041 14.5 15 22 A030127-038 17 17 19 A030127-033 20 (12 Hz) 20 14 A030127-028 25.5 (14 Hz) 25.5 10 Load mode: 45° Compression/roll Typical load range: 6 – 15 kg


Rated load at 10 Hz

(kg)



A030127-044 7 9.5 34 A030127-041 8.5 10.5 31 A030127-038 10 11.5 27 A030127-033 14.5 14.5 20 A030127-028 17.5 (12 Hz) 17.5 14



Rated load at 12 Hz

(kg)



A030127-044 2.0 6.0 26 A030127-041 2.3 6.5 23 A030127-038 2.7 7.0 20 A030127-033 4.4 8.5 15 A030127-028 8.8 10.5 10


Height (H) (mm)

Width (W) (mm)

Mass (kg)

A030127-044 44 52 0.12 A030127-041 41 49 0.12 A030127-038 38 47 0.12 A030127-033 32 42 0.11 A030127-028 28 37 0.11

21


1.3 SERIES A03

Fixture holes

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Inserts M6 IM YM MM


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• No aging

















Rated load at 10 Hz

(kg)



A040127-045 22 24 25 A040127-042 26 27 23 A040127-037 36 36 18 A040127-034 39 (11 Hz) 39 15 A040127-031 44 (12 Hz) 44 13 Load mode: 45° Compression/roll Typical load range: 10 – 30 kg Cable mounting type number

Rated load at 10 Hz

(kg)



A040127-045 13 17 36 A040127-042 15 19 32 A040127-037 21 23 25 A040127-034 25 26 22 A040127-031 31 31 18



Rated load at 12 Hz

(kg)



A040127-045 3.5 10 26 A040127-042 4 11 24 A040127-037 6 14 19 A040127-034 8 15 16 A040127-031 10 17 13


Height (H) (mm)

Width (W) (mm)

Mass (kg)

A040127-045 45 53 0.16 A040127-042 42 50 0.16 A040127-037 37 45 0.15 A040127-034 34 43 0.14 A040127-031 31 40 0.14

22

1.4 SERIES A04

Fixture holes

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Inserts M6 IM YM MM


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C.M - Last revision 20-12-2006



• No aging

















Rated load at 10 Hz

(kg)



A050127-057 20 26 32 A050127-051 36 42 27 A050127-044 56 56 21 A050127-039 70 (11 Hz) 70 16 A050127-034 84 (13 Hz) 84 12 Load mode: 45° Compression/roll Typical load range: 10 – 55 kg


Rated load at 10 Hz

(kg)



A050127-057 12 18 46 A050127-051 21 30 38 A050127-044 33 39 29 A050127-039 45 47 23 A050127-034 59 (11 Hz) 59 17

Load mode: Shear and roll Typical load range: 2 – 15 kg


Rated load at 12 Hz

(kg)



A050127-057 3 11 34 A050127-051 6 18 28 A050127-044 9 23 22 A050127-039 14 28 17 A050127-034 23 35 12


Height (H) (mm)

Width (W) (mm)

Mass (kg)

A050127-057 57 80 0.30 A050127-051 51 58 0.26 A050127-044 44 49 0.23 A050127-039 39 44 0.22 A050127-034 34 39 0.20

23


1.5 SERIES A05

Fixture holes

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Inserts M6 IM YM MM


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• No aging















-



Rated load at 10 Hz

(kg)



A060146-063 36 49 36 A060146-059 50 63 32 A060146-055 64 76 29 A060146-050 85 91 24 A060146-044 118 118 18 Load mode: 45° Compression/roll Typical load range: 15 – 70 kg


Rated load at 10 Hz

(kg)



A060146-063 21 35 51 A060146-059 30 45 46 A060146-055 37 54 40 A060146-050 50 64 34 A060146-044 70 76 26



Rated load at 12 Hz

(kg)



A060146-063 6 21 38 A060146-059 8 27 34 A060146-055 10 32 30 A060146-050 14 38 25 A060146-044 19 46 19

The number of wire loops can be less than 8, f. inst. 4 or 6, whereat the load range is correspondingly reduced. Cable mounting type number

Height (H) (mm)

Width (W) (mm)

Mass (kg)

A060146-063 63 95 0.37 A060146-059 59 80 0.33 A060146-055 55 71 0.31 A060146-050 50 63 0.28 A060146-044 44 56 0.26

24


1.6 SERIES A06

Fixture holes

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Inserts M6 IM YM MM


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• No aging

















Rated load at 10 Hz

(kg)





Rated load at 10 Hz

(kg)



A080146-083 18 35 67 A080146-068 27 42 48 A080146-064 37 54 43 A080146-060 47 65 38 A080146-055 62 78 32



Rated load at 12 Hz

(kg)



A080146-083 5 21 50 A080146-068 7 25 36 A080146-064 10 32 32 A080146-060 13 39 28 A080146-055 17 47 24


Height (H) (mm)

Width (W) (mm)

Mass (kg)

A080146-083 83 109 0.70 A080146-068 68 96 0.65 A080146-064 64 81 0.60 A080146-060 60 72 0.55 A080146-055 55 64 0.50

25


1.7 SERIES A08

Fixture holes

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Inserts M6 IM YM MM


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• No aging

















Rated load at 10 Hz

(kg)





Rated load at 10 Hz

(kg)



A100216-108 27 66 92 A100216-092 39 80 71 A100216-080 50 87 56 A100216-077 66 110 52 A100216-074 79 124 48



Rated load at 12 Hz

(kg)



A100216-108 7 40 68 A100216-092 11 48 53 A100216-080 14 52 42 A100216-077 18 66 39 A100216-074 21 74 36 The number of wire loops can be less than 8, f. inst. 4 or 6, whereat the load range is correspondingly reduced. Cable mounting type number

Height (H) (mm)

Width (W) (mm)

Mass (kg)

A100216-108 108 121 1.50 A100216-092 92 108 1.35 A100216-080 80 104 1.25 A100216-077 77 90 1.20 A100216-074 74 84 1.15

26


1.8 SERIES A10

Fixture holes

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Through holes 9 mm II IY IM


Inserts M8 IM YM MM


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• No aging

















Rated load at 10 Hz

(kg)





Rated load at 10 Hz

(kg)



A130216-108 68 159 85 A130216-095 93 186 69 A130216-089 127 233 61 A130216-083 145 245 53 A130216-076 192 291 45



Rated load at 12 Hz

(kg)



A130216-108 18 106 63 A130216-095 25 124 51 A130216-089 34 156 45 A130216-083 39 164 40 A130216-076 52 194 33 The number of wire loops can be less than 8, f. inst. 4 or 6, whereat the load range is correspondingly reduced. Cable mounting type number

Height (H) (mm)

Width (W) (mm)

Mass (kg)

A130216-108 108 133 2.4 A130216-095 95 121 2.2 A130216-089 89 105 2.0 A130216-083 83 102 1.9 A130216-076 76 92 1.7

27


1.9 SERIES A13

Fixture holes

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Inserts M8 IM YM MM


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• No aging

















Rated load at 10 Hz

(kg)





Rated load at 10 Hz

(kg)



A160267-127 100 254 94 A160267-109 167 344 71 A160267-100 228 411 60 A160267-096 269 458 55 A160267-089 346 528 46



Rated load at 12 Hz

(kg)



A160267-127 27 170 70 A160267-109 45 230 53 A160267-100 62 275 44 A160267-096 73 306 41 A160267-089 94 353 34


Height (H) (mm)

Width (W) (mm)

Mass (kg)

A160267-127 127 165 4.3 A160267-109 109 135 3.6 A160267-100 100 120 3.3 A160267-096 96 112 3.1 A160267-089 89 102 2.9

28


1.10 SERIES A16

Fixture holes

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Inserts M10 IM YM MM


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• No aging
















Cable mount type number

Rated load at 10 Hz

(kg)



A220368-190 245 743 103 A220368-159 420 966 75 A220368-152 505 1088 68 A220368-133 815 1416 51 Load mode: 45° Compression/roll Typical load range: 125 – 600 kg Cable mount type number

Rated load at 10 Hz

(kg)



A220368-190 145 525 145 A220368-159 248 683 106 A220368-152 299 769 97 A220368-133 482 1002 73


Cable mount type number

Rated load at 12 Hz

(kg)



A220368-190 39 351 108 A220368-159 67 457 78 A220368-152 81 514 72 A220368-133 130 670 54

The number of wire loops can be less than 8, f. inst. 4 or 6, whereat the load range is correspondingly reduced. Cable mount type number

Height (H) (mm)

Width (W) (mm)

Mass (kg)

A220368-190 190 210 11.8 A220368-159 159 178 10.1 A220368-152 152 165 9.7 A220368-133 133 140 8.6

29


1.11 SERIES A22

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Inserts M12 IM YM MM


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Last revision 23-08-2006

4.1 Sandwich mounts – general information Available with or without interleaf, the VRD 34/35 type mountings are produced in a range of rubber mixes (M45, MN50 and MN55) and sizes, close to stiffness tolerances, for use as main and auxiliary engine mountings. This type of mounting can also be used in earthquake area’s. In that case, additional calculations are required. All mountings are individually tested and selected on stiffness. Sandwich mountings, horizontally mounted for stationairy applications For land-based / stationairy applications, sandwich mountings can be placed horizontally underneath the generatorset, in order to provide a resiliently mounted system. Selection of the amount and rubber hardness of the sandwich mountings, as well as the position of the sandwich mountings, is done based on the weight of the installation, and the disturbing frequencies that have to be isolated. Sandwich mountings are perfectly suited for these installations based on their high permanent workload capacity, and their excellent isolating capabilities, combined with a relatively low price. Besides, installation of these mountings is very easy, both on initial assembly as well as upon replacement of the sandwich mountings. V-system A combination of sandwich mountings arranged in a ‘V’ system allows considerable flexibility to the designer. The important natural frequencies can be positioned into the excitation free frequency bands and in addition seaway and torque movements are relatively low at the coupling position. A ‘V’ system applies to the installation of a main engine and particulary to a medium speed engine. With high speed engines the design is in most cases much simpler than that of the medium speed engine. The acoustic properties of the sandwich mountings are excellent. The result of the measured structure borne vibration and noise transmission are available. In both the vertical and horizontal direction, the transfer functions show in the low frequency range a decrease of 12 dB/octave which can be compared with an ‘ideal massless spring characteristic’.

We will be pleased to undertake all suspension design calculation and advise on mounting type, quantity, position and rubbermix to ensure a ‘faultless’ flexible mounted installation. Before we can commence the design of a ‘V’ system, detailed information is required. Mounting selection The selection chart is ideal for initial selection; however, it is advisable to seek expert advice before finalising an installation design. In practice most installations will be subject to both translational and rotational excitation and in consequence an analysis of all six degrees of freedom will be necessary. We will be pleased to advise on mounting numbers, rubber mix and mounting positions to ensure a ‘faultless’ flexible mounted installation. Rubber Design gladly helps you with the engineering of your resilient mounted system. The necessary information in order to design such a system can be found on chapter 1.7 Vibration calculations are carried out using our specially developed computer programmes to meet new standards for both crews and passengers. Shock / earthquake The standard execution of the VRD 34/35 mountings can withstand shock-displacements up to 40% of the rubber height of the sandwich mount in lateral direction, and 20% in axial direction. This makes the mounting ideal for usage when equipment is placed in regions where earthquakes do occur. On application we can supply a special non-magnetic type manufactured in inoxida. Remarks It is our intention to maintain the excellent standard of our products. Modifications and improvements may be made from time to time and it is therefore advisable to contact us before ordering from the specifications given in this booklet. Approval The mountings and our calculation methods have been approved on many applications by the following classification societies: - Det Norske Veritas - Lloyd’s Register of Shipping

S.M. 30



4.2 Technical data and fitting instructions Creeprate. The typical creepage of the RD sandwich mounts will vary with compound, rubber hardness, dynamic loads and strain. A typical figure for a natural rubber compound in 55 ° SH A, for loads in between the maximum static load marine application and half that load will be 2% of the static deflection increase per decade. 48 hours after loading, more than half of the total creepfigure over 20 years, will be achieved.

Thermoshock. Every temperature exceeding the latest achieved peak temperature will cause a permanent set of the mount of

approximately 0.01 mm / °C in the range from 20° to 70° C. For instance the first thermal load from surrounding temperature to normal working temperature will cause an extra set of the deflected height next to the normal creep. Everytime the mount temperature is raised to the normal working temperature, no extra set will occur. Once the normal working temperature is exceeded, an extra set will occur again. The permanent set is directly related to the temperature of the rubber element. Thermal expansion. The typical thermal expansion rate of the RD sandwich mount will be approximately 0.03 mm / °C increase in height depending on compound, rubber hardness and strain. The expansion rate is directly related to the temperature of the rubber element.

Rubber Hardness

(shore.A)

Dynamic/static ratio

Dynamic magnifier

45º 1.10 – 1.20 22 50º 1.20 – 1.30 20 55º 1.30 – 1.45 18

Dyn

amic

fa

ctor

s 60º 1.40 – 1.55 16

Installation instructions Mounting and adjustment instructions for horizontally placed sandwich mountings. The sandwich mountings must be mounted on the prepared brackets on the base frame. 1) Fit the sandwich mountings to the bracket on the base frame

by means of four M16 bolts. 2) Align the generating set above the foundation frames. The

mounting holes in sandwich mounting must be aligned with the holes in the foundation frames.

3) Place a steel chock on the foundation frame underneath each

sandwich mounting. Thickness of steel chock: 20 mm. 4) Lower the generating set until it rests completely on the

sandwich mountings 5) After 48 hours, level and load distribution should be checked

by measuring the height of the sandwich mounting. The difference between the sandwich mountings should be as small as possible and should not exceed ± 2 mm.

Example:

mmN

HHHHAverage n++++

=...321

N = number of sandwich mountings The difference between the two sides of a sandwich mounting should not be more than 1 mm.

6) The mounting(s) with the largest deviation (from the

average) should be adjusted first. by machining the steel chock or adding thin steel shims between the sandwich mounting and the steel chock.

Mounting of sandwich elements on the foundation frame. 7) Fix all the sandwich mountings and the steel chocks to the

foundation frame with four bolts per sandwich. Mounting and adjustment instructions for V-positioned sandwich mountings. This instructions can be sent upon request.

S.M. 31



4.3 Type VRD 34 L1

Rubber Hardness

(shore.A)

Compression Stiffness

(kN/m)

Shear Stiffness

(kN/m)

Max. Load Static (kN)

Max. Load Marine

(kN)

Weight

(kg) VRD 34 L1 45º 8500 480 129 114 32.5 VRD 34 L1 50º 9800 550 152 133 32.5 VRD 34 L1 55º 12800 720 184 161 32.5 VRD 34 L1 60º 16000 900 218 191 32.5 Please note that the maximum load will be limited in case of shock or earthquake requirements in order to be able to absorb the input energy. On application we can supply a special non-magnetic type manufactured in inoxida.

VRD 34 L1

0

60

120

180

240

300

0 4 8 12 16 20Deflection in mm

Forc

e in

kN VRD34L1 45°

VRD34L1 50°VRD34L1 55°VRD34L1 60°

MS

S.M. 32



4.4 Type VRD 35 S1

Rubber Hardness

(shore.A)


(kN/m)

Shear Stiffness

(kN/m)


Max. Load Marine

(kN)

Weight

(kg) VRD 35 S1 45º 5000 270 78 67 22.5 VRD 35 S1 50º 6500 340 95 81 22.5 VRD 35 S1 55º 8250 415 114 97 22.5 VRD 35 S1 60º 12000 575 149 128 22.5 Please note that the maximum load will be limited in case of shock or earthquake requirements in order to be able to absorb the input energy. On application we can supply a special non-magnetic type manufactured in inoxida.

VRD 35 S1

0

40

80

120

160

200

0 4 8 12 16

Deflection in mm

Forc

e in

kN VRD35S1 45°

VRD35S1 50°VRD35S1 55°VRD35S1 60°

MS

S.M. 33



4.5 Type VRD 35 M1

Rubber Hardness

(shore.A)


(kN/m)

Shear Stiffness

(kN/m)


Max. Load Marine

(kN)

Weight

(kg) VRD 35 M1 45º 6500 285 107 92 22.5 VRD 35 M1 50º 8000 360 124 105 22.5 VRD 35 M1 55º 9600 440 142 120 22.5 VRD 35 M1 60º 11500 550 164 139 22.5 Please note that the maximum load will be limited in case of shock or earthquake requirements in order to be able to absorb the input energy. On application we can supply a special non-magnetic type manufactured in inoxida.

VRD 35 M1

0

50

100

150

200

250

0 4 8 12 16Deflection in mm

Forc

e in

kN

VRD35M1 45°VRD35M1 50°VRD35M1 55°VRD35M1 60°

M

S

S.M. 34



VRD 35 L1

0

100

200

300

400

500

0 4 8 12 16Deflection in mm

Forc

e in

kN

VRD35L1 45°VRD35L1 50°VRD35L1 55°VRD35L1 60°

4.6 Type VRD 35 L1

Rubber Hardness

(shore.A)


(kN/m)

Shear Stiffness

(kN/m)


Max. Load Marine

(kN)

Weight

(kg) VRD 35 L1 45º 9500 510 190 156 22.5 VRD 35 L1 50º 12500 650 227 184 22.5 VRD 35 L1 55º 16000 790 275 122 22.5 VRD 35 L1 60º 20500 1000 323 265 22.5 Please note that the maximum load will be limited in case of shock or earthquake requirements in order to be able to absorb the input energy. On application we can supply a special non-magnetic type manufactured in inoxida.

MS

S.M. 35 www.elektrykamorska.pl


4.7 Information necessary to design a suitable flexible suspension with sandwich mountings

Marine application Stationary application

Mai

n en

gine

s

Aux

iliar

y en

gine

s

Exha

ust s

yste

m

Dec

khou

se

Con

trol

cab

in

Com

pres

sor u

nit

Pum

p un

it

Gen

erat

orse

t

Com

pres

sor u

nit

Pum

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it

Mis

cella

neou

s

Description of installation + drawing ü ü ü ü ü ü ü ü ü ü ü Manufacturer / type ü ü ü ü ü ü ü ü Number of cilinders / 2-4-stroke / L-V ü ü ü ü ü ü ü ü Mass ü ü ü ü ü ü ü ü ü ü ü Centre of gravity in X, Y, Z direction ü ü ü ü ü ü ü ü ü ü ü Mass moments of inertias – 3 axes ü ü ü ü ü ü ü ü ü ü Number of mountings + positions ü ü ü ü ü ü ü ü ü ü ü Details flexible coupling(s) ü ü Details compensator(s) ü ü ü ü ü ü ü ü ü Reduction gearbox ü ü Operating speed + output Idling ü ü ü Operating speed + output Normal ü ü ü ü ü ü ü ü ü Operating speed + output Maximum ü ü ü Number of revolutions of propeller shaft ü ü ü ü ü ü ü Number of propeller blades ü ü ü ü ü ü ü Free forces / moments ü ü ü ü ü ü ü ü Type of vessel + classification ü ü ü ü ü ü ü Seaway conditions ü ü ü ü ü ü ü Shock conditions ü ü ü ü ü ü ü ü ü ü ü Ambient temperature ü ü ü ü ü ü ü ü ü ü ü Preserving requirements ü ü ü ü ü ü ü ü ü ü ü

S.M. 36



4.8 Maintenance of the sandwich mounts The life expectancy of the rubber elements will be approx. 20 years in ideal circumstances. Unfortunately, ideal circumstances are not feasible, therefore the (working) life expectancy will be approx. 10 years. The life expectancy of the rubber elements is dependent on the environmental circumstances (weather influences, contaminants, etc). A visual inspection of the sandwich mountings should be carried out six months after installation and should be repeated every year. For better recognition of damages, a blunt pin can be used. The use of a screwdriver is not advisable, because of the damage it can cause to the sandwich mountings. The use of a natural rubber (NR) compound for the rubber elements means that they are not oil resistant. The occasional occurrence of oil leaks does not effect the working of the sandwich mountings, because the oil will only damage the surface of the rubber elements. In case of oil contamination the rubber elements will show some signs of swelling. Certainly elements showing signs of severe swelling or evidence of rubber to metal separation should be replaced. To prevent damage caused by oil contamination, the rubber elements can be treated with an oil resistant coating. When cleaning the engine room with a solvent cleansing agent, it is advisable to cover up the sandwich mountings. If the cleansing agent still contaminates the rubber elements, they should be cleaned as follows. Storage, cleaning and maintenace of the rubber elements should be done in accordance with DIN 7716. The cleaning of the sandwich mountings should be done with a normal (household) cleansing agent. It is also advisable to use a glycerine-alcohol mixture (1:10). Do not use a solvent cleansing agent.

If required, the customer can paint the sandwich mountings. Be aware that only the top- and baseplate of the sandwich mounting can be painted. Do not use paint on the rubber element as the rubber element might be contaminated and therefore be damaged. Each sandwich mounting has a serial number for identification, which will be used for replacement to deliver a complete new identical product or to replace the inserts of the mountings, in question with genuine inserts and/or parts.

Type information can be found on the short side of the top baseplate. The above illustration gives the meaning of the used code. All deliveries are stored for over 20 years in a database including all relevant data and characteristics. V-positioned sandwich mountings In cases where it is necessary to replace the rubber insert, we advise to return the complete sandwich mounting to Rubber Design BV. The central buffer clearance should be examined and reset if necessary after the first week, after three months, and thereafter to fit in with normal maintenance programmes.

S.M. 37


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