Special Shock Reducing & Vibration Absorbing Elements

Industrial Shock Absorbers and Vibration Dampers / COMPENSER®

LEBEN provides special shock absorber & vibration damper in variants, as individual piece according to individual customer requirement and design.

Push & Pull Buffer

 

This design by LEBEN-Dämpfungstechnik GmbH acts as a hydraulic shock absorber in both, pulling and pushing direction. The energy dissipation of this kind of industrial shock absorber is performed in two ways:

Working principle:
As a purely hydraulic variant (TwinStroke®):
– in push (compression) direction hydraulically reversible by means of damping medium
– in pull (tension) direction hydraulically reversible by means of damping medium
The TwinStroke® dampens push and pull forces without an additional functional element. A piston system transmits the push and pull forces gas-hydraulically to different gas and oil chambers. In this way, any load can be absorbed immediately without idle stroke, so-called “slack”, and with minimal wear. The TwinStroke® can absorb changing loads very well.
The smaller size and lower weight is advantageous, as only one element is needed to absorb compression and tension forces. In addition, this design is more cost-effective than a comparable two-element system, as it eliminates the need for a mechanical friction spring in the direction of pull. If necessary, this hydraulic buffer can be easily replaced.

Design:

Hydraulic industrial shock absorber TwinStroke

As a hydraulic variant in combination with a mechanical spring:
– in push (compression) direction hydraulically reversible by means of damping medium
– in pull (tension) direction, mechanically reversible by means of friction spring
In addition, the buffer is equipped with return stroke damping to avoid impermissible force peaks in the direction of pull.

Industrial shock absorber Push Pull Buffer
Visco elastic buffer

Hydrostatic / Visco-Elastic / Elasto-Fluid Buffer

 

Shock reducing elements by LEBEN-Dämpfungstechnik GmbH known as hydrostatic, visco-elastic or elasto-fluid shock absorbers with an integrated spring-damper operating principle.

Advantage:

  • Use in pulling and pushing direction
  • Small design
  • Very high preload of the shock absorber
  • Individual reset force of the piston rod depending on the application

Used as a buffer in:

  • Railway couplings
  • Water locks / sluices

Illustrated hydrostatic buffer:
Damping of the pre-tensioned rope catch (tensioned catch rope) in front of a water lock

Special feature:

  • Total length of the shock absorber cylinder: 3,7 m
  • Weight: approx. 1.4 t
Vibration Damper
Vibration Damper

Vibration Damper

 

Vibration absorbers are produced in several configurations:

Single Tube Vibration Absorber:

for pull and push absorption at random mounting positions.
The length is increased to keep the diameter dimension at a minimum.

Twin Tube Vibration Absorbers:

for pull and push absorption. The preferred mounting position is vertically aligned. Compared to single tube absorbers, the length is decreased, while the diameter is enlarged.

The characteristic of damping for both types can be progressive or degressive.

(Detailed information concerning application and calculation can be found in the VDI-Guideline: VDI 3833 Bl.1+2 – German Association of Engineers Guideline.)

Vibration Damper Pendulum

Rotating Piston Absorber

 

Rotating Piston Absorbers are displacement absorbers using hydraulic flow resistance.
They are used to damp rotational vibrations, e.g. absorbers for ropeway cabins (see VDI-Richtlinie VDI 3833 German Association of Engineers, sheet 1).
The design is customized. Due to different operating conditions, no standard design is possible.

(see also VDI-Guideline, VDI 3833 sheet 1)

Industrial Shock Absorber

Retrofit – exchange of various other brands

 

Due to many years of experience in the field of damping technology, LEBEN is able to replace shock absorbers of other makes from various manufacturers.
The required characteristics of the damping property as well as the dimensions of these industrial shock absorbers to be replaced can usually be met by a replacement shock absorber made by LEBEN-Dämpfungstechnik GmbH.

Suspension Strut

Suspension Strut

 

Suspension strut (gashydraulic shock absorber) by LEBEN-Dämpfungstechnik GmbH

Advantage:

  • Use in pulling and pushing direction
  • Small design
  • Variable preload force of the damper

Used as a buffer in:

  • Amphibious vehicle
  • Underground shuttle

Illustrated suspension strut:
Damping of the independent suspension of an amphibious vehicle

Special feature:

  • Nitrogen gas spring as triple membrane accumulator
  • Regulation of the spring stiffness while driving

Various Dampers

 

Increasing demands on machines, vehicles and production facilities in terms of speed and mass cause considerable vibration problems. In many cases, the occurring magnitudes of frequency and amplitude exceed the in series produced standard dampers. Also space problems or missing connection parts for already existing plants require a modification of the standard program. Through state-of-the-art processes in design and production, LEBEN-Damping Technology GmbH has a high degree of flexibility and is therefore able to respond to special customer requirements even on small quantity basis.

Depending on the requirements, the reaction force or delay curve can be realized by individual throttle principle.