Device and method for testing torsional rigidity and mode of shafting

A technology of torsional stiffness and torsional mode, applied in measurement devices, vibration testing, testing of mechanical components, etc., can solve the problems of difficulty in measuring excitation torque and difficulty in implementing the frequency response method, and achieve easy implementation, high precision, and easy operation. convenient effects

Pending Publication Date: 2018-05-25
BRILLIANCE AUTO
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The implementation of the frequency response method is difficult because of the following reasons: 1. It is difficult to measure the magnitude of the excitation torque; 2. Precision instruments such as strain gauges, laser displacement sensors or angular acceleration sensors are required to measure torsional deformation

Method used

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  • Device and method for testing torsional rigidity and mode of shafting
  • Device and method for testing torsional rigidity and mode of shafting
  • Device and method for testing torsional rigidity and mode of shafting

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Embodiment Construction

[0033] To make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, below in conjunction with the attached Figure 1 to Figure 5 The present invention will be further described in detail with specific embodiments.

[0034] The device used in this embodiment to indirectly test the torsional stiffness and mode of the shaft system, such as figure 1 As shown, it includes an acceleration sensor 7 , an analog / digital conversion board 3 , a gain amplifier 2 and a computer 1 , a fixed stand 8 , a shaft to be measured 6 , an additional block 5 and a force hammer 4 . Among them, the acceleration sensor 7 is used to collect the acceleration signal of the additional block 5 on the shaft 6 and convert it into a voltage signal; the hammer 4 is used to excite the shaft 6 to generate modal vibration and generate a corresponding voltage according to the excitation force Signal, according to the material and weight of the shaft to be t...

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Abstract

The invention relates to a device and method for testing the torsional rigidity and mode of shafting, and belongs to the field of rigidity and mode test. In the device, a mass disc is bonded to the free end of a shaft to be tested, additional square blocks are bonded to the two sides, opposite to each other, in the side arm of the shaft to be tested respectively, and accelerometers are mounted onthe additional square blocks respectively. The device is easy to realize, convenient to operate and high in test precision, and fills the blanks in the field of torsional rigidity and mode test of theshafting. According to the method, the characteristic that the additional square blocks can act torsional moment excitation and test response of the tested shaft in the torsional direction is used, the mass disc is used to change the mass characteristic of the shaft, the torsional rigidity and moment of inertia of the tested shaft are calculated, the torsional rigidity and mode measured by the method can reflect the torsional oscillation characteristic of the shafting visually, and the method further has the advantage of high precision.

Description

technical field [0001] The invention relates to the field of stiffness and modal testing, in particular to a device and a testing method for indirectly testing the torsional stiffness and modal of a shafting system. Background technique [0002] Torsional vibration (referred to as torsional vibration) is the alternating circumferential motion of the shaft system due to the imbalance between the external excitation torque and its own torsional elastic force during the rotation process. In machinery and equipment using shaft transmission such as automobiles and ships, torsional vibration is the main source of noise and vibration problems. Torsional vibration is extremely destructive, such as increasing the fatigue damage of the shafting and reducing the service life. Severe torsional vibration will cause the shafting to be damaged or broken. Therefore, when designing rotating components, the design parameters related to shafting and torsional vibration must be considered. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/10G01M13/00G01M7/02
CPCG01M1/10G01M7/02G01M13/00
Inventor 徐勇王晖赵珩
Owner BRILLIANCE AUTO
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