+100 5 lubrication, cooling, and heating overview of ... · the following types of cooling are...

58 Catalog – X.. Series Helical and Bevel-Helical Gear Units

5 Overview of lubrication and cooling types Lubrication, Cooling, and Heating

5 Lubrication, Cooling, and Heating5.1 Overview of lubrication and cooling types

The following combinations of lubrication and cooling types are possible.

63096AEN

Splash lubrication Bath lubrication

Pressure lubrication

with shaft end pump with motor pump

without cooling

Fan

Built-in cooler

Circulation cooling

Oil-water cooler /OWC

Oil-water cooler /OAC

Water cooling cartridge /CCT

Water cooling cover /CCV

without cooling

Fan

Built-in cooler

Circulation cooling

Oil-water cooler

Oil-water cooler



without cooling

Fan

Built-in cooler

Circulation cooling

Oil-water cooler /OWP

Oil-air cooler /OAP



Lubrication

Cooling

Standard /FAN

Advanced /FAN-ADV

Standard /FAN

Advanced /FAN-ADV

Standard /FAN

Advanced /FAN-ADV

Heater

Oil heater /OH

Heating

Heater Heater

Oil heater /OH Oil heater /OH

0+1

00+5

0-5

0°C

Catalog – X.. Series Helical and Bevel-Helical Gear Units 59

5 TermsLubrication, Cooling, and Heating

5

5.2 Terms5.2.1 Types of lubrication

A basic concept for the type of lubrication has been specified for each SEW-EURODRIVE gear unit. Fundamentally, a combination of types is possible:

Splash lubricationThe oil level is low; gearing and bearing parts that are not immersed in the oil sump arelubricated by splashing oil. Standard lubrication type for horizontal mounting positions(M1 or M3).

Bath lubrication The gear unit is (almost) completely filled with oil; all gearing and bearing positions areeither completely or partly submerged in the oil bath.• Standard lubrication type with oil expansion tank for:

– Swiveling mounting positions with horizontal gear units beyond a certaininclination angle (depending on type of gear unit, version and size)

– Vertical gear units (mounting position M5) – Upright mounting position (M4) with X.K gear units

• Standard lubrication type with oil expansion tank for:– Upright mounting position (M4) with X.F gear units

Pressure lubrication

With pressure lubrication, the oil level is low. Gearing and bearing parts that are notimmersed in the oil sump are lubricated by oil using a shaft end pump or motor pumpthrough lubrication lines.Pressure lubrication is used when:• Splash lubrication is not possible (see the relevant mounting positions and variants

under "Bath lubrication")• Instead of bath lubrication if pressure lubrication is not desired and/or is not thermally

advantageous (see the relevant mounting positions and variants)• A Drywell sealing system is required (only with a vertical output shaft with LSS facing

down, separate publication),• High input speeds are present and the speed limit for other types of lubrication is

exceeded (dependant on the gear unit size, version, and number of stages)

0+1

00+5

0-5

0°C


5 Selection of lubricants Lubrication, Cooling, and Heating

5.2.2 Types of coolingThe following types of cooling are differentiated for the gear units:

Natural coolingThe gear unit is cooled by natural convection.

Fan cooling A fan is installed on the gear unit drive shaft; its airflow improves the transmission of heatfrom the gear unit surface to the environment (see chapter 5.5.1)

Integrated cooling

This refers to cooling systems installed directly in the gear unit housing or mounted veryclose to it, e.g. a water cooling cover (see chapter 5.5.2) or a water cooling cartridge(see chapter 5.5.3).

Circulation cooling

The gear unit oil is pumped out of the gear unit to an external heat exchanger by a pump(motor pump or shaft end pump). This normally involves oil supply systems with oil/wateror oil/air heat exchangers.

5.3 Selection of lubricants

5.3.1 General information on selecting oilUnless a special arrangement is made, SEW-EURODRIVE delivers the drives withoutoil fill. This does not apply to auxiliary drives and primary gear units.

STOPThe oil viscosity and type (mineral/synthetic) that are to be used are determined bySEW-EURODRIVE specifically for each order. This information is noted in the orderconfirmation and on the gear unit’s nameplate. Any deviation from these conditionsrequires consultation with SEW-EURODRIVE.

STOPThis means the gear unit must be filled with the correct oil grade and quantity beforestartup. The corresponding information can be found on the nameplate of the gear unit.

0+1

00+5

0-5

0°C


5 Selection of lubricantsLubrication, Cooling, and Heating

5

The following tables provide an overview of mineral and synthetic oils.

Mineral oilStandards Lubrication oils are divided into ISO VG viscosity classes according to ISO 3448 and

DIN 51519.

Synthetic oilStandards Lubrication oils are divided into ISO VG viscosity classes according to ISO 3448 and

DIN 51519.

In addition to having the required viscosity, the oil must fulfill the following criteria:• CLP oils according to DIN 51517-3• Micro-pitting test according to FVA, FV no. 54/ I-IV, GFT class high, damage force

level >10

If synthetic oil is used, SEW-EURODRIVE recommends polyalphaolefin-based oil(CLP HC).

ISOClass

ISO 6743-6Designation

DIN 51517-3Designation

AGMA 9005-D94Designation

150 ISO-L-CKC 150 DIN 51517-CLP 150 AGMA 4 EP





ISOClass

ISO 6743-6Designation

DIN 51519Designation

AGMA 9005-D94Designation

150 ISO-L-CKT 150 CLP HC 150 AGMA 4 EP





NOTEObserve the operating temperature of the gear unit when specifying the oil changeintervals.If required, a cooling system must be used or the oil change interval must be shortened(see "Lubricant Change Intervals" in the "Helical and Bevel-Helical X.. Series GearUnits" operating instructions).

0+1

00+5

0-5

0°C



5.3.2 Permitted lubricants

Notes on the lubricant table

The lubricant table on the following page shows the permitted lubricants for SEW-EURODRIVE gear units. Observe the following legend with regards to the lubricanttable.Abbreviations, meaning of shading and notes:

STOPThe standard for viscosity and oil grade is the type of oil that is specified by SEW-EURODRIVE in the order (see order confirmation and nameplate).

STOPConsult SEW-EURODRIVE if you use bio- and food grade lubricants or polyglycol oils.

CLP = Mineral oilCLP HC = Synthetic polyalphaolefin

= Mineral lubricant = Synthetic lubricant

0+1

00+5

0-5

0°C


5 Selection of lubricantsLubrication, Cooling, and Heating

5

5.3.3 Lubricant table

OilOilOil

VG 150

Mobilgear SHC XMP150

Mobilgear XMP220VG 220

BP EnergolGR-XF 320

DIN (ISO)

ISO VG class

CLP

CLP HC

CLP HC

CLP HC

CLP HC

CLP

Degol BG 150 Plus

Mobil®

Degol BG 220 Plus

Degol BG 320 Plus

Degol BG 460 Plus

Degol BG 680 Plus

BP EnergolGR-XF 150 Meropa 150

BP EnergolGR-XF 220

BP EnergolGR-XF 460

BP EnergolGR-XF 680

Optigear BM 150

Meropa 220

Meropa 320

Meropa 460

ShellOmala F220

ShellOmala F 320

Shell Omala F460

Mobilgear XMP320

Mobilgear XMP460

Mobilgear XMP680

KLÜBER GEM 1-150N

KLÜBER GEM 1-220N

KLÜBER GEM 1-320N

KLÜBER GEM 1-460N

KLÜBER GEM 1-680N

Renolin CLP150Plus

Renolin CLP 220 Plus




Goya NT 150

Goya NT 220

Goya NT 320

Goya NT 460

Goya NT 680

Alphamax 150

Alpha SP 150

VG 150Degol

PAS 150BP Enersyn EP-XF 150 ELGreco 150

ELGreco 220

ELGreco 320

ELGreco 460

KlüberGEM4-150N

Renolin Unisyn CLP 150

Carter SH 150

Carter EP 220

Degol PAS 220

BP Enersyn EP-XF 220

Optigear Synthetic X 150

Tribol 1710/150

Tribol 1510/150


Optigear Synthetic A 220

Tribol 1710/220

Tribol 1510/220


Optigear Synthetic A 320

Tribol 1710/ 460

Tribol 1510/ 460


Tribol 1710/ 320

Tribol 1510/ 320

Tribol 1100/150

Optigear BM 220

Alphamax 220

Alpha SP 220

Tribol 1100/220

Optigear BM 320

Alphamax 320

Alpha SP 320

Tribol 1100/320

Optigear BM 460

Alphamax 460

Tribol 1100/460

Optigear BM 680

Alpha SP 680

Tribol 1100 / 680

Pinnacle WM 150

Pinnacle WM 220

Shell Omala Oil HD 220


KlüberGEM4-220N


Carter SH 220

Degol PAS 320

BP Enersyn EP-XF 320

Pinnacle EP 320



Mobil SHC 632

KlüberGEM4-320N


Carter EP 320

Carter EP 460

Carter EP 680

Carter SH 320

VG 220

Degol PAS 460

BP Enersyn EP -XF 460

Pinnacle WM 460



Mobil SHC 634

Klüber GEM4-460N


Carter SH 460

Meropa 680

TO T A LO T A L

Q8

VG 460

CLP

CLP

VG 320CLP

VG 680

VG 460

VG 320

47 0490 105

X.K..X.F..

0+1

00+5

0-5

0°C



5.3.4 Lubricating greasesThe following overview shows the greases recommended by SEW-EURODRIVE.

Supplier Sealing grease

Aral Aralub HLP2

BP Energrease LS-EPS

Castrol Spheerol EPL2

Chevron Dura-Lith EP2

Elf Epexa EP2

Esso Beacon EP2

Exxon Beacon EP2

Fuchs Renolit CX-TOM15

Gulf Gulf crown Grease 2

Klüber Centoplex EP2

Kuwait Q8 Rembrandt EP2

Mobil Mobilux EP2

Molub Alloy BRB-572

Neste Allrex EP2

Optimol Olista Longtime 2

Shell Alvania EP2

Texaco Multifak EP2

Total Multis EP2

Tribol Tribol 3030-2

0+1

00+5

0-5

0°C


5 AccessoriesLubrication, Cooling, and Heating

5

5.4 Accessories

Visual oil level check

In the M1 mounting position in connection with splash lubrication, the gear unit isequipped with an oil level glass as standard. An oil dipstick is available as option.For the M3 mounting position and lubrication types, an oil dipstick is used for the oil levelcheck.Gear units for operation in either the M1 or M3 mounting position, are delivered with twooil dip sticks (one per mounting position).If you want to use pivoted and variable mounting positions, contact SEW-EURODRIVE.

Breather The breather prevents impermissible pressures, which arise from heating during opera-tion. The gear units are normally equipped with a high-quality breather filter with a filtermesh of 2 μm.

Oil drain The gear unit is equipped with an oil drain plug as standard. An oil drain valve may beprovided as option. This allows for a drain pipe to be easily attached when changing thegear unit oil.

NOTEThe position of accessories may vary depending on the gear unit type and size. Referto the dimension sheets for detailed information

61540AXX

[1][2][3][4]

Oil dipstick (optional)BreatherOil level glassOil drain

[2]

[1]

[3]

[4]

0+1

00+5

0-5

0°C


5 Cooling Lubrication, Cooling, and Heating

5.5 CoolingIf the permitted thermal rating of the gear unit is exceeded, additional cooling measuresmust be applied.The following cooling methods are possible as standard:• Fan on the drive shaft (only X2.. and X3.. gear units)• Water cooling cover (≤ size 210)• Water cooling cartridge• Fan in combination with water cooling cover (≤ size 210) and water cooling cartridge• Circulation cooling with oil-water cooler with a motor pump• Circulation cooling oil-air cooler with motor pump

5.5.1 /FANFans with optimized noise and flow engineering geometry are used. A fan may beretrofitted to raise the thermal rating or when the ambient conditions change after gearunit startup. The direction of rotation of the gear unit does not influence the operation ofthe fan.

SEW offers the following fan variants:X.F.. Fan (standard) /FAN

STOPMake sure that the air intake is not blocked or covered.

NOTEFor information about the fan regarding dimensions, position and clear air intake, referto chapter 10 and 11.

60683AXX

[1] Air intake that should be kept clear

[1]

[1]

30°

0+1

00+5

0-5

0°C


5 CoolingLubrication, Cooling, and Heating

5

X.K.. Fan (standard) /FAN

X.K.. Advanced (option) /FAN-ADV

When the X3K Advanced version is used, the connection element (e.g. hydrauliccentrifugal coupling) can be mounted flush on the fan guard.The air intake that must be kept clear is integrated into the fan guard.

60684AXX

[1]

[1]

30°

NOTEOn request, the fan guard is available flush with the gear unit housing on one side.Please contact SEW-EURODRIVE if required. Observe the restricted thermal ratinginvolved.

60685AXX

[1] Air intake that should be kept clear

[1]

[1]

30°

NOTEFan version X..K.. cannot be used together with a torque arm because the fan guard ismounted to the attachment point of the torque arm.

0+1

00+5

0-5

0°C



5.5.2 Built-in cooling, water cooling cover /CCVThe water cooling cover is located on the gear unit’s assembly opening and is providedwith cooling water through a water connection that is provided by the operator. It isavailable for sizes 180 to 210. For connection dimensions, refer to chapter 10.3.The amount of heat that can be removed depends on the intake temperature and thevolume flow of the cooling medium that flows through the unit. The permitted thermalrating is listed in the selection tables in chapters 10.2. and 11.2.

Structure The water cooling cover [1] is made of a corrosion-resistant aluminum alloy.Two bores G1/2" with pipe threads are available to connect to the cooling circuit. Thepiping is not included in the scope of delivery.Gear units in the water cooling cover version are delivered completely assembled.A water cooling cover may be retrofitted; consult SEW-EURODRIVE.

Notes on connection and operation

A cooling water volume flow (water inflow temperature 15 °C) depending on the gearunit size is necessary according to the following table to achieve the thermal rating givenin the selection tables. The cooling capacity of the water cooling cover changes when the cooling water quantityor temperature changes or when specific cooling media are used. It may be necessaryto contact SEW-EURODRIVE.

STOPContact SEW-EURODRIVE if chemically aggressive cooling media, such as brackishor salt water, are used.

60982AXX

[1][2]

Water cooling coverSupply

[3] Return

[1][1][2] [3]

Size Cooling water volume flow [l]

180 - 190 8

200 - 210 11

0+1

00+5

0-5

0°C



5

5.5.3 Built-in cooling, water cooling cartridge /CCTThe water cooling cartridge is mounted in the gear unit’s oil sump and is provided withcooling water through a water connection that this provided by the operator. It isavailable for sizes 180 to 320. For connection dimensions, refer to chapters 10.3 and11.3The amount of heat that can be removed depends on the intake temperature and thevolume flow of the cooling medium that flows through the unit. The permitted thermalrating is listed in the selection tables in chapters 10.2. and 11.2.

Structure The water cooling cartridge consists of two basic parts:• Cooling pipes (CuNi alloy)• Connection piece (brass)Two bores G1/2" with pipe threads are available to connect to the cooling circuit. Thepiping is not included in the scope of delivery.Gear units in the water cooling cartridge version are delivered completely assembled.Water cooling cartridges can be retrofitted; consult SEW-EURODRIVE.


60978AXX

[1][2]

Cooling pipes Connection piece

[3][4]

SupplyReturn

[2][1][3] [4][4] [3]

NOTEFor gear unit sizes 180, 200, 220, 240, 260, 290, 310, the water cooling partridge optioncomprises two cartridges as standard; for sizes 190, 210, 230, 250, 270, 280, 320, itcomprises one cartridge.

0+1

00+5

0-5

0°C



Notes on connection and operation

A cooling water volume flow (water inflow temperature 15 °C) depending on the gearunit size is necessary according to the following table to achieve the thermal rating givenin the selection tables. The cooling capacity of the water cooling cartridge changes when the cooling waterquantity or temperature changes or when specific cooling media are used. It may benecessary to contact SEW-EURODRIVE.

The cooling circuit must be connected in parallel for gear units with two water coolingcartridges. The cooling water quantity has to be dimensioned individually for eachcooling cartridge.

Cooling water volume flow [l]

Size X2F / X2K / X3F / X3K X4F / X4K

180 - 210 9 4

220 - 250 12 4

260 - 270 22 8

280 - 300 24 10

310 - 320 28 13

0+1

00+5

0-5

0°C



5

5.5.4 Circulation cooling oil-water cooler with motor pump /OWCAn oil-water cooling system may be used if the thermal rating of the naturally cooledgear unit or cooling using a fan on the input shaft is not sufficient. The prerequisite forusing an oil-water cooling system is that appropriate cooling water is available on-site.

Structure The standard design of this cooling system (variant 0) comprises:• Pump with directly mounted asynchronous motor• Oil-water heat exchanger• Temperature switch with two switching points for

– controlled startup of the motor pump with an oil temperature > 40 °C– monitoring of the cooling group, i.e. warning or gear unit shutdown when the

oil temperature exceeds 90 °C

The cooling system is delivered as a complete unit, but without electrical connections.The following designs are available:• Directly mounted on the gear unit, including cooling circuit piping, or• On the mounting frame, for separate installation, but without piping to the gear unit


NOTEThe following versions apply for gear units with splash lubrication. The cooling systemwith a motor pump only cools the gear unit oil.

NOTEThe connection between temperature switch and cooling system has to be establishedby the customer.

62524XX

[1] Pump with motor [5] Pressure pipe

[2] Oil-water heat exchanger [6] Cooling water supply

[3] Temperature switch with two switching points [7] Cooling water return

[4] Suction pipe

M

[1]

[2]

[3]

[1]

[3] [2] [4]

[5][6]/[7]

[4] [5]

[6]

[7]

0+1

00+5

0-5

0°C



Further instrumentation available on request, such as:• Flow monitoring• Thermostatic valve in the oil and/or water circuit• Filter in the oil circuit• Manometer• Thermometer

Sizes, cooling capacity and selection

The power data of the standardized cooling systems is summarized in the followingtable.

The cooling capacities given in the table apply to a cooling water temperature of 30 °C,an oil temperature of 70 °C, equivalent volume flow of oil and cooling water, and 50 Hzmains frequency.

The selection tables (see chapters 10.2 and 11.2) include recommendations forselecting an appropriate cooling system based on gear unit version, size and gear unitreduction ratio.In addition, the selection of an appropriate cooling system depends on the followingfactors:• The actual power loss to be cooled• The present cooling water temperature and volume flow• Relation oil quantity gear unit/oil volume flow cooling system > 2

SizeCooling system

Cooling capacityCooling system

[kW]

Oil volume flowCooling system

[l/min]

Connection powerPump motor

[kW]

OWC 010 5 10 0.75

OWC 020 9 21 1.1

OWC 030 14 28 1.5

OWC 040 22 53 2.2

OWC 050 30 77 3

OWC 060 45 91 4.0

OWC 070 70 144 5.5

NOTEWhen selecting the appropriate cooling system based on the ambient conditionspresent for your system, consult SEW-EURODRIVE.

0+1

00+5

0-5

0°C



5

Installation and connection information for separate installation

The cooling system is delivered as a complete unit on a mounting frame but withoutelectrical connections and piping. Provide for a low-vibration installation location max. 1meter from the gear unit. Install the cooling system at the same level or lower than thegear unit. If this is not possible, contact SEW-EURODRIVE.Adhere to the following basic conditions when connecting the cooling system:• A reduction in the indicated cable cross section is not allowed.• It is important that you choose the correct wall thickness and material when selecting

pipes, hoses and screw fittings. Preferably, use composite material seals.

SEW-EURODRIVE recommends the following cable cross sections for connecting thecooling system to the gear unit and the cooling circuit.

Sizecooling system

Pump suction connection1) Suction pipe2) Cooler pressure

connection1) Pressure pipe3)Cooler

cooling water connection

Water cooling line ∅ interior

OWC 010 GE22-LR 1/2” DN20 / ∅ 22 GE18-LR 1“ DN16 / ∅ 18 G1/2“ ∅ 13

OWC 020 GE35-LR 1 1/4” DN32 / ∅ 35 GE28-LR 1 1/2“ DN25 / ∅ 28 G1/2“ ∅ 19

OWC 030 GE35-LR 1 1/4” DN32 / ∅ 35 GE28-LR 1 1/2“ DN25 / ∅ 28 G1“ ∅ 25

OWC 040 GE42-LR 1 1/2” DN40 / ∅ 42 GE35-LR 1 1/2“ DN32 / ∅ 35 G3/4“ ∅ 25

OWC 050 GE42-LR 1 1/2” DN40 / ∅ 42 GE35-LR 1 1/2“ DN32 / ∅ 35 G1 1/4“ ∅ 32

OWC 060 SAE 2“ SFL DN50 / ∅ 2” GE42-LR 1 1/2” DN40 / ∅ 42 G1 1/2” ∅ 38

OWC 070 SAE 2 1/2“ SFL DN50 / ∅ 2” GE42-LR 2 1/2” DN40 / ∅ 42 G1“ ∅ 38

1) GE threaded connection is included in the scope of delivery2) Max. length 1.5 m3) Max. length 2.5 m

NOTEFor dimensions of the oil-water cooler with motor pump, refer to chapter 12.10.1.Detailed technical data of the various cooling systems is available from SEW-EURODRIVE on request.

0+1

00+5

0-5

0°C



5.5.5 Circulation cooling oil-air cooler with motor pump /OACAn oil-air cooling system may be used if the thermal rating of the naturally cooled gearunit or cooling using a fan on the input shaft is not sufficient.

Structure The standard design of this cooling system (variant 0) comprises:• Pump with directly mounted asynchronous motor• Oil-air heat exchanger• Temperature switch with two switching points for

– controlled startup of the motor pump with an oil temperature > 40 °C– monitoring of the cooling group, i.e. warning or gear unit shutdown when the

oil temperature exceeds 90 °C

The cooling system is delivered as a complete unit on a mounting frame for separateinstallation but without electrical connections and piping (provide for a low-vibrationinstallation location max. 1 meter from the gear unit).

NOTEThe following versions apply for gear units with splash lubrication. The cooling systemwith a motor pump only cools the gear unit oil.

NOTEThe connection between temperature switch and cooling system has to be establishedby the customer.

63151AXX

M

[1]

[2]

[3]

[4] [5]

M[5]

[2]

[4]

[4]

[5]

[3]

[1] Pump with motor [4] Suction pipe

[2] Oil-air heat exchanger [5] Pressure pipe

[3] Temperature switch with two switching points

0+1

00+5

0-5

0°C



5

Further instrumentation available on request, such as:• Flow monitoring• Filter in the oil circuit• Manometer• Thermometer

Sizes, cooling capacity and selection

The power data of the available cooling systems is summarized in the following table.

The specified cooling capacity applies to an air temperature of 40 °C with an oiltemperature of 70 °C and 50 Hz mains frequency.The selection tables (see chapters 10.2 and 11.2) include recommendations forselecting an appropriate cooling system based on gear unit version, size and gear unitreduction ratio.In addition, the selection of an appropriate cooling system depends on the followingfactors:• The actual power loss to be cooled• The present ambient temperature• Relation oil quantity gear unit/oil volume flow cooling system > 2

SizeCooling system

Cooling capacityCooling system

[kW]

Oil volume flowCooling system

[l/min]

Connection powerPump motor

[kW]

OAC 010 5 28 0.75

OAC 020 9 28 0.75

OAC 030 14 58 2.2

OAC 040 22 58 2.2

NOTEWhen selecting the appropriate cooling system based on the ambient conditions pres-ent for your system, consult SEW-EURODRIVE.

0+1

00+5

0-5

0°C



Installation and connection information

Provide for a low-vibration installation location max. 1 meter from the gear unit. Installthe cooling system at the same level or lower than the gear unit. If this is not possible,contact SEW-EURODRIVE.The cooler must be installed in such a way that input and output air can flow unobstruct-edly. You have to provide for sufficient ventilation and protection against dirt. Adhere tothe following basic conditions when connecting the cooling system:• Avoid a short circuit in the cooling circuit. The suction and pressure lines must be

installed on the gear unit as far apart as possible.• A reduction in the indicated cable cross section is not allowed.• It is important that you choose the correct wall thickness and material when selecting

pipes, hoses and screw fittings. Preferably, use composite material seals.

The oil-air cooling system is delivered in the design as illustrated as standard. Theconnections of the cooling system are located on the lefthand side of the system. Inorder to keep the cable lengths to the gear unit short, the suction and pressureconnection should be aligned towards the gear unit during installation. The connectionscan be moved to the other side if required. To do so, loosen the pump head [1] and theregister [2], rotate them by 180° and re-attach them.

63230AXX

180°

[2]

180°

[1]

0+1

00+5

0-5

0°C



5

SEW-EURODRIVE recommends the following cable cross sections for connecting thecooling system.

Sizecooling system

Pump suction connection Suction pipe1)

1) Max. length 1.5 m

Cooler pressure connection Pressure pipe2)

2) Max. length 2.5 m

OAC 010 1 1/4" DN32 1" DN25

OAC 020 1 1/4" DN32 1" DN25

OAC 030 1 1/2" DN40 1 1/4" DN32

OAC 040 1 1/2" DN40 1 1/4" DN32

NOTEThe cooler must be installed in such a way that the input and output air flow is notobstructed. You have to provide for sufficient ventilation and protection against dirt. For dimensions of the oil-air cooler with motor pump, refer to chapter 12.10.2. Detailedtechnical data of the various cooling systems is available from SEW-EURODRIVE onrequest.

0+1

00+5

0-5

0°C


5 Oil heater /OH Lubrication, Cooling, and Heating

5.6 Oil heater /OHAn oil heater is required to ensure lubrication during a cold gear unit startup when theambient temperature is low.

5.6.1 StructureThe oil heater consists of two basic parts:1. Resistor element in the oil sump ("Oil heater") with terminal box2. Temperature sensor with thermostat

60792AXX

[1] Oil heater

[2] Temperature sensor with thermostat

[2]

[1]

STOPIn order to prevent damage, it is essential that the heating elements are fully immersedin the oil sump.

NOTEThe position of the thermostat and the temperature sensor varies with design andmounting position of the gear unit.

0+1

00+5

0-5

0°C


5 Oil heater /OHLubrication, Cooling, and Heating

5

5.6.2 Connection powerThe table below shows the power of the heating that may be installed.

5.6.3 Notes regarding the function of the oil heater• The thermostat of the oil heater is factory-set to a temperature of about 5 K above

the respective limit temperature. The thermostat turns off the oil heater at thistemperature. Only then, the gear unit may be started up. If the temperature fallsbelow the limit temperature by approx. 5 K, the thermostat activates the oil heateragain.

• The thermostat and oil heater are installed on the gear unit and ready for operation,but they must be wired properly and connected to the external power supply beforestartup.

• Contact SEW-EURODRIVE if a differing oil viscosity class is used or if ambienttemperatures fall below the identified limit temperature.

Pinst Pinst

Gear unit 1 Heating element 2 heating elements

Size Design [kW] [K/h] [kW] [K/h]

180X2F.., X2K, X3K.., X3F.., X4K.. 1 x 1.6 5 2 x 1.6 11

X4F.. 1 x 1.1 4 2 x 1.1 7

190X2F.., X2K, X3K.., X3F.., X4K.. 1 x 1.6 5 - -

X4F.. 1 x 1.1 4 - -

200

X2K 1 x 1.6 5 2 x 1.6 9

X2F.., X3K.., X3F.., X4K.. 1 x 1.8 5 2 x 1.8 10

X4F.. 1 x 1.3 3 2 x 1.3 7

210

X2K.. 1 x 1.6 4 - -

X2F.., X3K.., X3F.., X4K.. 1 x 1.9 5 - -

X4F.. 1 x 1.3 3 - -

220X2K.. 1 x 1.8 4 2 x 1.8 8

X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 2.2 5 2 x 2.2 9

230X2K.. 1 x 1.8 4 - -

X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 2.2 4 - -

240X2K.. 1 x 1.8 3 2 x 1.8 6

X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 2.2 4 2 x 2.2 7

250X2K.. 1 x 2.2 4 - -

X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 2.6 4 - -

260 X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 3.8 5 2 x 3.8 10

270 X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 3.8 5 - -

280 X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 4.2 5 - -

290 X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 4.2 4 2 x 4.2 8

300 X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 4.2 4 - -

310 X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 5.0 4 2 x 5.0 7

320 X2F.., X3F.., X4F.., X3K.., X4K.. 1 x 5.0 4 - -

K/h = Heating power [kelvins/hour]

Pinst = Power of the installed heater

0+1

00+5

0-5

0°C


5 Oil heater /OH Lubrication, Cooling, and Heating

5.6.4 Limit temperature for gear unit startupThe minimum permissible ambient temperature for gear unit startup depends on theviscosity of the oil that is used and of the lubrication type of the gear unit.

The following tables show the limit temperatures (minimum ambient temperatures) forgear unit startup without and with oil heater.

Mineral oil

STOPBefore startup, the oil must be heated up to the temperature specified under 'Withoutheater’' (see following table).

Type of lubrication Design ISO VG320 ISO VG220 ISO VG150

Splash lubrication,Bath lubrication

without heater(minimum permitted ambient/oil bath temperature) –12 °C –16 °C –21 °C

with heater (1 heating element)(minimum permitted ambient temperature)Sizes 180 - 250

–27 °C –31 °C –36 °C

with heater (2 heating elements)(minimum permitted ambient temperature)Only sizes 180, 200, 220, 240, 260, 290, 310

–40 °C –40 °C –40 °C

Pressure lubricationwith shaft end pump

without heater(minimum permitted ambient/oil bath temperature) +6 °C +1 °C –4 °C


–11 °C –16 °C ––21 °C

with heater (2 heating elements)(minimum permitted ambient temperature)Sizes 180, 200, 220, 240, 260, 280, 310

–28 °C –33 °C –38 °C

Pressure lubricationwith motor pump

without heater(minimum permitted ambient/oil bath temperature) +15 °C +10 °C +5 °C


–2 °C –7 °C –12 °C

with heater (2 heating elements)(minimum permitted ambient temperature)Baugröße 180, 200, 220, 240, 260, 290, 310

–19 °C –24 °C –29 °C

0+1

00+5

0-5

0°C


5 Oil heater /OHLubrication, Cooling, and Heating

5

Synthetic oil

Type of lubrication Design ISO VG320 ISO VG220 ISO VG150

Splash lubrication,Bath lubrication



–40 °C –40 °C –40 °C


–40 °C –40 °C –40 °C

Pressure lubricationwith shaft end pump



–21 °C –25 °C –31 °C


–38 °C –40 °C –40 °C

Pressure lubricationwith motor pump

without heater(minimum permitted ambient/oil bath temperature) +8 °C +3 °C –3 °C


–9 °C –14 °C –20 °C


–26 °C –31 °C –37 °C

STOPThe temperatures specified refer to the average values of the permitted lubricantsbased on the lubricant table (see chapter 5.3.2). In borderline cases, the permittedtemperature of the lubricant that is actually being used must be verified. When planningthe motor, observe the increased starting torque at low temperatures. It may benecessary to contact SEW-EURODRIVE.

0+1

00+5

0-5

0°C

+100 5 lubrication, cooling, and heating overview of ... · the following types of cooling are...

Documents