A method for testing the thermal-elastic coupling vibration characteristics of friction plates in the friction-slip process

Abstract

The invention belongs to the technical field of experimental simulation, and specifically relates to a method for testing the thermal-elastic coupling vibration characteristics of a friction plate friction slip process, which specifically includes testing the friction torque characteristics, rotational speed change characteristics, and thermo-solid coupling characteristics of friction elements during the friction slip process, and then obtains The vibration characteristic test can provide theoretical support for the structural strength simulation calculation and optimal design of the friction element. This method uses special real-time data processing technology to obtain the thermoelastic coupling vibration characteristics of the friction pair during the bonding / separation process, which can remove strong interference signal, through accurate circular frequency vector and quadratic integral calculation, the relationship between the torque characteristic and the speed change can be obtained respectively, and the temperature field analysis and vibration vector spectrum analysis results can be further integrated to obtain the thermoelastic coupling vibration characteristics. The present invention provides The experimental test method is simple and practical, and the test result has high precision.

Description

technical field [0001] The invention belongs to the technical field of experimental simulation, and in particular relates to a method for testing the thermal-elastic coupling vibration characteristics of a friction-slip process of a variable-speed friction plate. Background technique [0002] As an important part of special vehicles, the transmission system's performance directly affects the mobility (such as braking, passing, acceleration), reliability and service life of the vehicle. The failure of the transmission system will directly cause the special vehicles to be unusable. [0003] The clutch friction pair is one of the important basic components of the transmission system. In actual engineering, when the friction pair is in power transmission, the friction plate often generates heat due to friction, which in turn causes damage such as thermal bending deformation, cracks or even fractures. In order to explore the vibration caused by thermal structural deformation of ...

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Problems solved by technology

However, if the vibration displacement of the friction pair is directly tested through the friction pair sliding process, such as symmetrically pasting several micro-displacement sensors and pre-embedded thermocouples on the surface of the 405 friction pair dual steel plate, it is not only limited by the conditions of the test equipment, such as Within the limited sensor installation measurement range, it is impossible to accurately find the position of the highest temperature point, and the micro-displacement vibration signal caused by thermoelastic deformation is much smaller than the vibration signal caused by the test bench system, such as lubricating oil spray, rotating motor interference, etc. , without special processing in other ways, the obtained vibration signal cannot accurately reflect the thermal-elastic coupling vibration characteristics of the friction pair friction-slip process caused by thermal-elastic deformation

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