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

A compressor rotor and torsional vibration technology, which is applied in vibration testing, measuring devices, testing of machine/structural components, etc., can solve problems such as low signal-to-noise ratio, large installation space, large error, etc., and improve the accuracy of measurement , The effect of improving voltage sensitivity and eliminating nonlinear errors

Active Publication Date: 2010-06-30
CHONGQING BUILDING VEHICLE USE AIR CONDITIONER
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0049] see Figure 1 to Figure 4 with Figure 7 , a rotary vane type small compressor rotor torsional vibration test device, a rotating part 10a of a brush-type conductive ring 10 is connected to a mounting plate 8 by screws, and two screws are connected from the rotating part of the brush-type conductive ring 10 respectively The two mounting holes 17 provided on 10 a pass through and are fastened to the two threaded holes 14 on the mounting plate 8 , so as to fix the brush-type conductive ring 10 on the mounting plate 8 . The mounting plate 8 is provided with a central via hole 7 in the axial direction, and the central via hole 7 is radially provided with a through hole 9 that runs through the mounting plate 8. The eccentric position of the mounting plate 8 is provided with three via holes 15, and three screws pass through the mounting plate 8 respectively. The three through holes 15 are firmly connected with the three mounting threaded holes 13 provided on the compressor ar...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
Inventor 胡立志李德江刘宜琼李茂龙
Owner CHONGQING BUILDING VEHICLE USE AIR CONDITIONER
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