safe and efficient fixation of round rods · 2019. 7. 22. · the patented clamping device...
TRANSCRIPT
Clamping device Ratio-Clamp®
Safe and efficient fixation of round rods
The patented clamping device Ratio-Clamp®
fixes any round rod directly from the standstill
and completely locks it into position. The clamping
effect is immediate, lasts for an unlimited period
of time and doesn't require any energy supply –
suitable for various applications, as a safety
element or for locking component parts into
place. 100% reliable!
Ratio-Clamp® Won't let you down!
Contents
Advantages
Functional principle
Energy efficiency
Application areas
Equipment
Releasing pressure
Locking
Sealing system
Certification
Accessories
Technical data
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6
8
10
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32 |
ADVANTAGES
Hänchen's Ratio-Clamp® offers safety while saving energy costs. Thanks to its
sophisticated functional principle, the clamping device features some funda-
mental advantages when compared with other locking systems.
Safety without compromise. Absolute efficiency.
+Do you need a round rod locked in a specific position? There are several ways to do this:
Electronic control, blocking all ports or using the clamping device Ratio-Clamp®. Ratio-Clamp®
features a number of advantages.
Clamping without energy supply
Cost savings thanks to no energy loss
Safe clamping in case of system failure
Clamping for an unlimited period of time
Accurate locking in any position
Safety even in extreme conditions such as heat or cold
+ The functional principle in detail
Ratio-Clamp® works mechanically by using frictional contact: The power is directed through springs
to a clamping sleeve which holds the rod radially using friction. The load capacity of the fixation is
not influenced by the direction. The hydraulic releasing pressure moves the locking piston against
the spring power to unlock the clamp - the rod can be moved in both directions. When the hydraulic
pressure drops, the power stored in the springs is released, and the rod is locked.
Clamps all round rods
Immediate locking of the rod
Zero play and wear-free with all types of movement, even with vibrations of the application
Energy-efficient thanks to pressureless clamping process
You can find more detailed
information on the clamping
device Ratio-Clamp® in our
book "The Hydraulic Cylinder".
Elec
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Blo
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R
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®
Comparison of advantages and disadvantages
of locking options for round rods
Functional principle
Locked state
Functional principle
Released state
Energy efficiency – + +
Accuracy of position + – +
Independence of external factors + – +
Time and effort – + +
rodspring
locking piston housing clampingsleeve
releasing pressure
4 | 5
You need assistance?
Hänchen offers extensive all-round
support and service. From standard
to special solutions - with decades
of experience, we'll always find the
perfect product for your application.
APPLICATION AREAS
We promise a lot. And we keep it all.
There are many situations where rods have to be held in a certain position:
For example to protect people, machines and tools in case of power failures
or plant shutoffs. Or to fix axes during a manufacturing process. And also for
all highly dynamic applications and test processes. Here are some examples
from practical experience:
4. Aviation > Test stand
The setups for aviation tests have
been refined to the last detail. Hänchen
cylinders are used in different fields of
testing, simulating ambient conditions
and loads during different flight phases.
Ratio-Clamp® clamping devices are used
to protect the intricately constructed
and expensive systems.
5. Navigation > Transport
Hänchen hydraulic cylinders with
fitted Ratio-Clamp® devices are used
for moving the bow and stern doors of
ferries. The clamping devices guaran-
tee that the doors are tightly closed
during the voyage and safely locked
while passengers are embarking or
disembarking.
1. Casting machine > Production
Hänchen cylinders and Ratio-Clamp®
clamping devices are perfect for casting
machines because they must be precise
as well as particularly resistant to heat
and corrosion. Ratio-Clamp® devices hold
the mould parts safely together during the
casting process of aluminium motor blocks.
2. Sanding machine > Production
During the production process of ICE track
beds, extremely large and heavy concrete
workpieces must be positioned for sanding
safely and with an accuracy of 0.01 mm.
Hänchen's hydraulic cylinders and Ratio-
Clamp® clamping devices are designed
exactly for these requirements.
3. Trains > Maintenance
Trains need to be lifted and fixed for
maintenance – Ratio-Clamp® devices
are perfect for this. The clamping
device will keep the train safely in
place until the work is done and it
can get back on the tracks.
76 |
EQUIPMENT
+ Basic design
The basic release pressure required for
releasing the clamping device is between
the minimum pressure and the maximum
admissible pressure of 160 bar.
+ Reduced design
For application cases with low supply
pressure, a version designed with a reduced
released pressure is available.
+ TÜV certification
Ratio-Clamp® is certified by TÜV SÜD
as a safety element.
+ DGUV Test
The clamping device is also available
with a DGUV Test certification (testing
and certification system of the Deut-
sche Gesetzliche Unfallversicherung).
Releasing pressure
+ Locking with spring power
Usually, energy stored in springs is used
to clamp a rod. This means that the rod
can be held for unlimited periods of time
without any energy supply.
+ Hydraulic locking
When very high holding loads are required,
the clamping device can also be locked
hydraulically. For the release, hydraulic
pressure is used as usual.
Locking Certification
+ Servocop®: compact seal, lip seal, wiper ring
The basic type of Ratio-Clamp® uses the friction-optimized
sealing system Servocop®. Here, the primary seal is touching
the rod. The maximum speed of the rod is 1 m/s.
+ Pressure piston seal, lip seal, wiper ring
For very sensitive applications, we recommend the
design with pressure piston seal, where no pressurized seal
is touching the rod. Thus, the sliding friction is very low and
remains constant regardless of the releasing pressure. The
maximum speed of the rod is 2 m/s.
Sealing system
pressure piston sealrodspring
locking piston housing clampingsleeve
98 |
You can find design and calculation assistants in our
product configurator at www.haenchen-hydraulic.com
You need assistance?
Hänchen offers extensive all-round support and
service. From standard to special solutions – with
decades of experience, we'll always find the perfect
product for your application.
+ For all round rods with hard surfaces
Load capacity independent of direction
After 2 m switchings, the clamping device must be checked by the manufacturer
Max. rod speed: 1 m/s for Servocop®, 2 m/s for pressure piston seal
Max. releasing pressure: 160 bar
Operating temperature: -15 to +80° C
Liquids: mineral oils
Locking with spring power up to 900 kN & rod Ø 180 mm
Hydraulic locking up to 2,000 kN & rod Ø 300 mm
Other holding loads on request
Quality taken to the next level.
+ hydraulic cylinders
Ratio-Clamp® can be combined wwith
Hänchen hydraulic and standard cylin-
ders and with all cylinders from oother
manufacturers.
+ Proximity switch
Indicates whether the clamping device device
is locked released.
+ Control block
Used when Ratio-Clamp® is installed
on a cylinder. It provides correct and
consistent control and thus reduces the
complexity of the required wiring.
EQUIPMENT | TECHNICAL DATA
Ratio-Clamp® Ratio-Clamp®
with reduced
releasing pressure
Ratio-Clamp®
with DGUV Test
certification
Ratio-Clamp®
with pressure
piston seal
Sealing system Servocop® Servocop® Servocop® Pressure piston seal
Releasing pressure Basic design Reduced design Basic design Basic design
Certification TÜV certification TÜV certification DGUV Test TÜV certification
Functional principle Locked with spring power Locked with spring power Locked with spring power Locked with spring power
Rod Øf7in [mm]
F axialmax
in [kN]
p releasemin
in [bar]
F axialmax
in [kN]
p releasemin
in [bar]
F axialmax
in [kN]
p releasemin
in [bar]
F axialmax
in [kN]
p releasemin
in [bar]
16 10 60 8 50
18 12.5 55 8 35 6.25 55 12.5 75
20 14 55 9 40 7 55 14 75
22 17 70 12 45 8.,5 70 17 90
25 20 70 15 50 10 70 20 90
28 31.5 90 25 65 15.75 90 31.5 120
30 40 105 30 75 20 105 40 135
32 40 60 30 45 20 60 40 90
36 45 75 32 50 22.5 75 45 100
40 50 80 38 55 25 80 50 100
45 65 70 45 50 32.5 70 65 90
50 80 90 55 60 40 90 80 110
56 90 75 60 50 45 75 90 100
60 100 75 70 55 50 75 100 100
63 100 85 60 55 50 85 100 110
70 140 80 100 55 70 80 140 110
80 180 90 130 65 90 90 180 110
90 200 65 100 65 200 85
100 250 75 125 75 250 95
110 300 65 150 65 300 90
120 330 70 165 70 330 90
125 350 75 175 75 350 90
140 450 65 225 65
1110 |
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Herbert Hänchen GmbH & Co. KGBrunnwiesenstr. 3, 73760 Ostfildern
Postfach 4140, 73744 Ostfildern
Fon +49 711 44139-0
Fax +49 711 44139-100
www.haenchen.de