Drive components for test benches
Systems, assemblies or components must be carefully examined and tested for their functionality and operational safety as well as their behaviour under prolonged load or at high speeds before they are actually used in series production. Test benches provide the most accurate measurement results and ensure the exact reproducibility and scalability of test procedures. Adapted clutch systems such as torque-limiting safety clutches or backlash-free equalising clutches are an important integral component in the drive train of test benches for these challenging tasks.
Overload clutch for high-speed test benches
High-speed test benches generate in-depth knowledge about the material behaviour of a wide range of test specimens in high speed ranges through extensive measurement data acquisition.
To ensure that the test specimens and the measuring units are reliably protected, the Securmax HeavyDuty load-separating safety clutch ensures accurate torque limitation in the high-speed process in the event of sudden torque peaks. The disengaging, residual torque-free overload clutch is designed precisely for these requirement profiles, where high torques, large masses and high speeds are encountered.
The clutches in this series have individual disengaging segments - also known as disengaging modules - that are mounted evenly around the circumference. Infinitely variable torque adjustment is carried out via the adjustment modules attached to the front of the respective engagement segments. Three alternative adjustable torque ranges are available for each size. This range of transmittable torques is determined by the number of respective disengaging segments. For direct drives with shaft-shaft connections, the Securmax HeavyDuty is also available with a combined equalising coupling.
Reliable overload protection in a high-speed testing system in the automotive industry
Immediate disconnection in the event of an overload combined with maximum torsional rigidity must be ensured by disengaging safety clutches in testing systems for assemblies and components in the automotive industry that run at high speeds of up to 6,000 rpm. When recording the measurement data for precise measurement results, interfering factors in the systems must be eliminated, i.e. any misalignments occurring in the drive train must be compensated for by the safety couplings. The disengaging Securmax Servo DSS/SG/NF guarantees reliable disconnection between the input and output sides in the test systems in just a few milliseconds if the preset limit torque is exceeded. At the same time, this backlash-free torque limiter in combination with a torsionally rigid and compact single-cardanic disc coupling enables additional compensation of angular and axial shaft misalignments. Predestined for high-speed testing applications, the Securmax Servo is available for speeds of up to 8,000 rpm, depending on the size.
High alternating loads and speeds in the motor test bench
Motors are put through their paces in universal test benches. The focus here is on recording key figures such as torque, speed, voltage or friction torque in order to draw conclusions about the efficiency of the respective test specimen.
High alternating loads with uninterrupted periodic speed changes, combined with very dynamic torque changes in reversing operation, play the main role in such test benches. In addition to a low mass moment of inertia corresponding to the dynamic load changes, the precision of the clutch used plays a decisive role in achieving the most accurate measurement results. The lightweight Speedmax high-speed clutch offers precisely matched properties for these demanding tasks. It combines a balanced ratio of damping and torsional rigidity and is designed for speeds of up to 42,000 rpm, depending on the size. The functional element of the Speedmax consists of the synthetic polymer HNBR, a hydrogenated nitrile butadiene rubber. This encloses a ‘finger-like’ aluminium hub structure on the inside, which protrudes from the outer hubs into the functional area and is vulcanised into the HNBR.
