Dynamic performance testing device for belt transmission system

Abstract

The invention relates to a dynamic performance testing device for a belt transmission system. The dynamic performance testing device comprises a testing platform, a servo motor, an input shaft, a driving wheel, a belt, a driven wheel, an output shaft, a tensioner and an inert wheel. Laser displacement sensors are used for measuring transverse vibration of a belt section when the belt operates; laser rotating speed sensors are combined with reflective pulses generated by reflective paper pasted to the driving wheel and the driven wheel to measure the rotating speed; a pressure sensor is used for measuring belt compressing force borne by the inert wheel, and conducting back calculation to obtain belt tensioning force; a potentiometer is used for measuring swing vibration of the tensioner; and a magnetic powder brake is used for providing load torque for the belt transmission system, and a torque sensor is used for measuring a load torque value of the belt transmission system. The dynamicperformance testing device is simple in structure, easy to realize and low in cost, can be transformed into various dynamic characteristic testing platforms for the belt transmission system by replacing the type of belt wheels, and provides guidance for the design of an engine accessory transmission system by serving as an experimental verification platform for a dynamic model of the belt transmission system.

Description

technical field [0001] The invention relates to a dynamic performance testing platform of a belt transmission system, which belongs to the field of mechanical transmission. Background technique [0002] The belt drive system, especially the V-belt drive system is widely used in the engine accessory wheel train, which is mainly composed of a V-belt, a crankshaft pulley, a tensioner, an alternator pulley, a water pump pulley, an oil pump pulley, Composed of accessory wheels such as air-conditioning compressor pulleys. Compared with ordinary V-belts, multi-V belts have lower bending stiffness and have multiple ribs (large contact area), so the structure of multi-V belt transmission system is more compact, the load capacity is stronger, and there are more driven accessories. Since the tensioner contains a spring damping mechanism, it is mainly used to automatically adjust the tension of the belt, avoid slippage of the V-belt and excessive tension fluctuations, and suppress vibr...

AI Technical Summary

Problems solved by technology

At present, the design and layout of the engine accessory gear train is mainly carried out through theoretical analysis, but the theoretical analysis has greatly simplified the V-belt and each accessory wheel, which cannot accurately reflect the dynamic performance of the V-belt transmission system, causing many problems. When the V-belt transmission system designed at that time actually works, the tension of the V-belt fluctuates too much, the V-belt and the tensioner wear prematurely, the service life is short, and the vibration and noise of the entire transmission system are too large.

Therefore, the design scheme of the engine accessory gear train proposed only by theoretical analysis can no longer meet the requirements for higher performance of the engine accessory gear train at the present stage, and it is necessary to verify and improve the theoretical model with experiments

However, in actual work, due to factors such as the compact structure of the engine accessory gear train, many dynamic characteristics such as belt tension fluctuations cannot be measured, which seriously affects the performance evaluation of the designed engine accessory gear train.

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