Customer
Our customer, a designer and manufacturer of shock absorbers, approached us with a requirement for a vertical bench to apply compressive or tensile forces at controllable speeds, positions and forces.
Tested product
Shock absorber
This is a mechanical system that reduces the violence of an inertial shock. The shock energy is absorbed by the shock absorber, without rebound.
These shock absorbers are sized according to the speed and mass to be braked.
Objective
Characterise the force/displacement curve of a shock absorber at low speed
Problematic issues
- Simple to operate and design
- Large stroke 1500 mm
- High force Compression 1000 kN / Traction 700 kN
- Risk of splashing elastomer or liquid contained in the tested products.
Solution and result
The vertical machine was designed to apply controllable forces in compression or traction, with controllable speed, position, and force.
A double-acting hydraulic cylinder generates both a compression force (rod extension) and a traction force (rod retraction).
The useful hydraulic pressure is generated by a variable displacement pump controlled by a "load sensing" system.
"Load sensing" system: a hydraulic system that automatically adjusts the inclination of a variable displacement pump's plate based on the maximum required load (pressure). This system ensures that sufficient pressure is always available while optimizing the power consumed by the pump.
Two protective doors are structured to protect the operator in the event of possible projections of elastomer or liquid contained in the tested products.
