Testing of the drive train
Wherever power is converted and transferred, tests ensure the reliability of the installed component. ZwickRoell has over 50 years of experience testing engine and drive components. Initially, the load tests performed were simple, but today extremely specific properties must be measured and documented, and also at high speeds, torques, and extreme temperatures.
Axial and torsional measurements on clutch disks
Dry friction clutches are also used to apply (comfortable acceleration) and to interrupt the torque flow. In addition to the aforementioned axial characteristic curves, torque characteristic curves are therefore also extremely important, for example,
- Zero crossing (average value of angle of rotation between loading and unloading)
- Pre-damper and main damper characteristic curve (angle or torque controlled)
- Partial curve (for determining the friction coefficient)
- Drag torque (minimum permissible torque after releasing the clutch)
In addition to torque characteristic curves, the following axial curves are determined: characteristic curve of cushioning springs (force/travel characteristic curve of the spring between the clutch plates), non-parallelism (measurement of non-parallelism at preload), and thickness of clutch plates (measurement of plate thickness at preload).
