Katalog / Catalogue LEBEN Damping Technology 2019 v10
Excerpt of Catalogue Industrial Shock Absorbers
LEBEN manufactures hydraulic industrial shock absorbers, vi-
bration dampers, buffers, deformation tubes, hydrostatic / vis-
co-elastic buffers & special shock absorbers according to indivi-
dual customer requirements.
The company LEBEN was founded in 1967. In its early years,
the family-run company developed, among other things, ski
groomer vehicles for ski runs. Since 1980, only shock reducing
elements and vibration dampers are developed and manufac-
tured under our trademark Compenser®. More than 50 years
of successful customer relationships around the globe and the
continuous development of our products for a wide range of
applications confirm our strength and expertise in the field of
The calculation of our shock reducing elements is carried out
in compliance with the VDI Directive VDI 2061 „Modular ele-
ments for reduction of shock effects“. Our products comply
with the relevant regulations of the EC Machinery Directive
We are certified according to DIN EN ISO 9001:2015, a tribute
to our quality policy.
In view of the wide range of applications for damping technolo-
gy, LEBEN-Dämpfungstechnik GmbH provides different types
of shock absorbers, including Gas Hydraulic Heavy Duty Shock
Absorbers, Emergency Shock Absorbers as end stop (emergen-
cy stop at end position), Shock Absorbers for Operational Load
Cycles and Irreversible Shock Absorbers.
For use at extreme high temperatures or low temperatures, we
offer our damping fluid Compensol®.
Our goal is to meet each individual requirements of our custo-
For special designs of the mounting geometry and adaptations
to existing structural elements, we will meet the individual re-
quirements of our customers.
„Special shock absorbers“ such as vibration dampers, visco-ela-
stic buffers (spring & damping element based on the compres-
sibility of silicone oil) and damping systems for earthquake
protection we ask to inquire in case of need, as these are not
catalogued and are designed according to the individual requi-
rements of the application.
We will be pleased to carry out the design calculation and type
determination for you, and provide you with data sheets, di-
mensional drawings and 3D models!
S-SERIE // S-SERIES
Für Anwendungen im mittleren und schweren Maschinenbau,
im Bergbau und für Hafen-, Werft- und Containerkrane. // For
applications in the field of medium and heavy mechanical en-
gineering, mining, port cranes, shipyard cranes and container
DC-SERIE // DC-SERIES
Der doppelt wirkende DC–Typ ist besonders geeignet für mit-
fahrende Anwendungen. Er wird hauptsächlich in Regalbedien-
geräten verwendet. // The double-acting DC type is particularly
suitable for ride-on applications. It is mainly used in storage and
retrieval systems (AS/RS) equipment.
KL-SERIE // KL-SERIES
Sicherheitsdämpfer mit kurzen Hüben. Ausgelegt für
Not-Stopp-Aufgaben in der Handhabungstechnik, für kleine Re-
galbediengeräte und kleine Krananlagen. // Safety dampers with
short strokes. Designed for emergency stop tasks in the field of
handling technology, small-scale storage and retrieval systems
(AS/RS) equipment and small-scale crane systems.
CE-SERIE // CE-SERIES
Die preiswerten Crashelemente sind für einen einmaligen Not-
fall-Stopp ausgelegt. Das Reaktionskraftniveau wird je nach
Auftrag konfiguriert. // The inexpensive crash elements are
designed for a single use only emergency stop operation. The
reaction force level is configured according to the order.
C-SERIE // C-SERIES
Ideale kostengünstige Stoßreduzierelemente für Regalbedi-
engeräte oder kleinere Förder- und Krananlagen, Prüfstände
etc. // Ideal cost-effective shock reducing elements in the field
of storage and retrieval systems (AS/RS) equipment or smaller
conveyors and crane systems, test stands, etc.
Under the COMPENSER® brand we offer a wide range of shock
and vibration absorbers. In case of an impact, the reduction of
distance, force or deceleration is applied by converting the im-
pact energy (kinetic energy) into heat or deformation energy.
This is achieved by:
Hydraulic flow resistance by means of throttling of liquids, ela-
stic deformation, friction between solid bodies or plastic de-
Shock reducing elements are differentiated between:
V pre-set reversible hydraulic shock reducing elements for
safety applications in one off or rare impacts (emergency
buffer), e.g. in the case of crane systems, high rack storage
warehouses, buffer stops, couplings for railways and struc-
tures for earthquake protection.
V pre-set reversible hydraulic shock reducing elements for
safety applications with frequent impact loads (operational
push-in buffer), e.g. in automation technology the piston
rod is operationally approached and pushed in to reach the
V pre-set non-reversible, plastically deformable crash ele-
ments for one-off impact.
V universally adjustable hydraulic shock reducing elements
for regular impact applications, e.g. in the field of producti-
on machines and handling equipment.
Different damping media are available for our shock and vibra-
tion absorbers, depending on the requirements: For use in tem-
perature controlled rooms up to extreme high or low tempera-
tures with low to high viscosity settings.
For special applications, e.g. temperatures above 80 °C or be-
low -30 °C, as well as for type “S-Series” emergency shock ab-
sorbers, we use a thixotropic, paste-like, viscoplastic dispersant
as a damping medium. This medium solidifies when resting to
a seemingly solid mass and only becomes uniformly fluid again
when force is applied. When the load is no longer applied, it
returns to the seemingly solid state.
Our shock reducing elements are calculated according to the
VDI guideline: VDI 2061 “Modular elements for reduction of
We are able to provide you with individually adapted reaction
force and deceleration characteristic curves. For the majority of
applications, the distinction between the curve profile in A and
B is sufficient. In the following section, our design possibilities
for damping curves according to a requested force level are de-
scribed in more detail. A design in respect of deceleration acts
in the same way.
The exemplary curves on the next page illustrate the different
energy absorption at the same stroke of 300 mm.
REACTION FORCE CURVE A (COEFF. 1,1)
The progression of reaction force curve A results in maximum
energy consumption and optimum deceleration. The impacting
mass to be protected is decelerated to a standstill with a cons-
tant reaction force. In the case of dampers with long strokes and
close to their maximum power limit, it is most likely common
that curve A is not possible. In this case, curve B or a special
force curve is used.
REACTION FORCE CURVE B
The progression of reaction force curve B rises softly, as well as
the deceleration, up to the maximum force. As a result, at the
moment of impact, the structure to be stopped is decelerated
much more soft. In the case of shock reducing elements where
the piston rod‘ s strength is exceeded due to a long stroke, an
overload can be avoided with force curve B.
Due to the increasing maximum force, a larger angular deviation
as well as a center offset of the impacting object can be com-
pensated, as well.
In contrast to the A-curve, the damper requires a longer stroke
for the same energy absorption at a defined maximum force.
If the same stroke is considered for curves A and B, the
maximum force resulting from the increasing energy ab-
sorption at curve B is higher than at curve A in order to
achieve the same level of energy by the end of the stroke.
SPECIAL REACTION FORCE CURVE
Various variants are possible. The characteristic of the curve can
be progressive, regressive, degressive or staggered. Thus diffe-
rent reaction force levels can be realised.
For example: Reaction force curve customized for two colliding
vehicles of which one vehicle could eventually stand fixed by a
brake system (fixed end stop). See load case 1 and load case 3.
The adapted reaction curve can efficiently damp both scenarios.
SELECTION OF THE SHOCK ABSORBER
Required data for the selection of shock reducing elements
V impact mass per absorbing element [kg]
V impact speed [m/s]
V possibly existing proppelling force [N]
V load case (1,2,3,4), load group (1,2), application (1-6)
V direction of movement (vertical or horizontal)
V possibly maximum angular deviation or center offset to the
V amount of strokes per hour [z/h]
V ambient temperature [°C]
V environmental conditions (e.g. corrosive, dusty, electrolytic,
V requested characteristic of the reaction curve (A or B)
If the requested force or deceleration shouldn‘t be exceeded,
this must also be specified. In principle, all of the necessary data
must be provided for each inquiry or order so that the optimum
shock reducing element can be designed for the requested ap-
If the maximum values of the tables are exceeded, we ask for an
The application and calculation examples mentioned in this ca-
talog are only a small selection of many possibilities. If you have
any questions about the design of special applications, we are
looking forward to take over the calculation and selection of the
shock reducing element for you.
The following diagrams have been created in order to simplify
the selection of shock reducing elements.
The series to be selected can already be determined by the total
energy to be damped and the required stroke (due to a prede-
termined maximum permissible deceleration or maximum reac-
tion force). The lines shown in the diagram represent maximum
values, i.e. the intersection point of energy and stroke must be
below the characteristic curve of the selected series.