Device for testing torsion and vibration of rotor of revolution vane minitype compressor and test method

Abstract

The invention discloses a device for testing the torsion and the vibration of a rotor of a revolution vane minitype compressor and a test method. A brush type conducting ring is connected with an armature of the compressor through an installation pan; the armature of the compressor is in spline fit with the rotation shaft of the compressor; the armature and the rotation shaft are axially positioned by a press screw bolt with an axial through hole; the brush type conducting ring is respectively connected two sets of resistance type strain sheets through lead wires; the two sets of resistance type strain sheets are symmetrically bonded on the rotation shaft of the compressor at intervals of 180 degrees along the circumference of the rotation shaft to form in to a four-arm differential bridge to be taken as a sensor for the torsion and the vibration of the rotor of the induction compressor; the change characteristic of the shear force of the torsion and the vibration of the rotation shaft is computed and analyzed by measuring the strain change quantity of the resistance type strain sheets when the rotator rotates; an output linear relation between the strain change quantity of a voltage signal by loading excitation voltage; an outputted torsion and vibration voltage signal is amplified through the adjustment of a dynamic strain amplifier; and change data of the voltage signal is acquired, monitored and analyzed by a data acquisition processor, i.e. the data of the torsion and the vibration of the rotation shaft of the compressor can by obtained by a computer.

Description

technical field [0001] The invention relates to the field of torsional vibration testing of rotors of rotary vane compressors, in particular to a testing device and method for torsional vibrations of rotors of rotary vane compressors. Background technique [0002] Small rotary vane compressors are usually used in automotive air-conditioning systems. Due to their small size and light weight, the general dimensions of this type of compressor are about 20cm×13cm×13cm, and the total weight is generally within 10kg. Since the rotary vane compressor is installed on the vehicle engine to run, the severe vibration generated when the vehicle is running creates a harsh working environment for the rotary vane compressor. Therefore, there are requirements for the product design indicators and actual vehicle fault diagnosis of the rotary vane compressor. The measurement of the torsional vibration of the compressor rotor is one of the most important aspects in the evaluation of the compre...

AI Technical Summary

Problems solved by technology

Using this kind of measuring device, because the structure of the measuring device is too large, the installation space is large, and the test installation is extremely inconvenient. It is only suitable for testing large-scale rotating machinery, and cannot be used for torsional vibration testing of small rotating machinery, especially when applied to real vehicles on site. test, it is even more impossible to install it on the car for real vehicle testing; and because this test device needs to be connected with an extended shaft, the shaft is lengthened, the original quality of the shaft is changed, and the torsional vibration characteristics of the shaft are also changed. Larger, unable to detect accurate data, will affect the test effect

The other is to transmit the energy and signal through the magnetic field coupling of the torsional vibration signal of the compressor. The disadvantage of this measurement method is that the torsional vibration signal is weak, the signal-to-noise ratio is low, and the interference of the lateral vibration makes the extraction of the torsional vibration signal difficult. and analysis are very difficult, the accuracy of the test is seriously affected, the error is large, and the test effect is not good

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