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Industiral Drive Systems.webp

Testing Laboratory

CONTECS uses specialized test rigs for Poly-V, timing belt, chains, viscous and rubber damper characterization. The lab offers integrated material and component analysis. Reliable measurement data is an indispensable requirement for MBS model parameter identification. The well-established VDA standard procedure for Poly-V belts is an outstanding example, only available for SIMDRIVE 3D. Performing measurements and parameter optimization in-house is one of CONTECS core competences for the best MBS simulations possible.

Torque & Torsional Vibration

The effect of torque and pretension on the transmission behavior of Poly-V and timing belts is a fundamental information for the determination of model parameters.

Mechanical properties for rubber and viscous dampers and their sensitivity to temperature, frequency and amplitudes can be analyzed as well.

  • Slip curves and coefficients of friction for Poly-V belts for varied pulley diameters, pretensions and temperatures

  • Timing error characteristics of synchronous belts

Longitudinal Vibration

The longitudinal stiffness properties of a belt pulley system are analyzed by running a variation matrix of pulley diameter, pretension and rotary speed. Final parameter optimization is performed on the results from both the Longitudinal Vibration and Torque & Torsional Vibration test rig.

  • Cord and rubber stiffness for belts

  • Damping parameter for transversal belt vibrations

  • Belt bending stiffness for power loss analysis

Tooth Contact

Parameter determination for timing belts is impossible without having a detailed look on the tooth contact. The non-rotating test rig is focusing on the interaction between sprocket and timing belt teeth. Material and geometry of the belt determine its tooth stiffness.

  • Tooth stiffness described as force polynomial (2nd / 3rd order)

  • Coefficient of friction

  • Backlash between belt and pulley

Damper Testing

Temperature is a key parameter for rubber and viscous dampers with a strong influence on stiffness and damping properties. The dissipated power inside an operating damper leads to temperature changes and is permanently detuning the eigenfrequencies of any mass elastic system. Measuring the damper at different oscillation amplitudes and frequencies provides the TVD parameters under careful control of the required test temperatures.

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