The hydraulic long-stroke test rig (“HyLaHub”) is a linear oscillating test rig for investigating the friction and stick-slip behavior of rod seals from hydraulic cylinders on piston rods with different coatings and surface topographies.
The seal to be tested is placed in the pressure chamber together with a wiper and a guide band (“seal package”).
During the test, the pressure chamber is moved relative to the fixed piston rod.
A second spindle is used to apply a torque from the pressure chamber to the piston rod to simulate lateral forces on the seal pack.
Pressure is generated via a pressure relief valve downstream of the pressure chamber.
A radial piston pump ensures the oil supply.
The temperature of the hydraulic oil is controlled via a thermostat.
The HyLaHub can be used to investigate the operating behavior of rod seals on piston rods as a function of pressure, speed, temperature and lateral force.
In addition to stick-slip tests, long-term or service life tests are also possible.
Maximum pressure
300 bar
Temperature
RT up to 120 °C
Traversing speed
5 mm/s to 50 mm/s
Lateral force
Material-dependent (deformation of the guide band as a limiting factor)
No standard tests
Voltage
400 V
Frequency
50 … 60 Hz
Power
x kVA
Fuse
32 A
Dimensions
W x H x D: 2100 mm x 1400 mm x 900 mm
Weight
approx. 400 kg
Friction
Frictional force, friction behavior over the stroke (stick-slip detection)
Test pressure in the chamber
Lateral force
Acoustics
Microphone
Leakage
Weighing the spilled oil
- Adaptation for customer-specific components optionally possible