Multi Body Rub-impact Response and Experiment of Rotary Vane Compressor

doi:10.3901/JME.2024.16.429

Abstract

Abstract: Aiming at the abnormal vibration caused by rub-impact excitation in the start-up stage of rotary vane compressor, considering the dynamic contact relationship between rotor, vanes and cylinder, the multi-body contact force and pneumatic force were used as excitation sources to establish the multi-body contact dynamic model of rotor-vanes-cylinder system, and the dynamic response of rub-impact was analyzed in the start-up stage. Then, the compressor vibration test bench was set up to verify the rationality of the vibration response calculation model of the whole machine in the start-up stage. The results show that the variation rules of the vibration response of the experiment and the calculation model are basically consistent, which verifies the rationality of the calculation model of the vibration response of the whole machine in the start-up stage. When the pressure difference between suction and exhaust is small, the vanes collide with cylinder and vane groove repeatedly, and the vibration of the whole machine appears obvious sawtooth fluctuation. With the increase of suction and exhaust pressure difference, vanes and cylinder will maintain stable contact, rotor and compressor vibration will tend to be stable. The oil circuit mechanism can be designed to shorten the length of the oil circuit to obtain faster back pressure response, so as to reduce the vibration time in the start-up stage of the compressor. The research results can provide reference for friction impact vibration control of rotary vane compressor.

Key words: rotary vane compressor, rub-impact vibration, multi body dynamics, vibration experiment

CLC Number:

TH455

HE Zeyin, XIANG Yin, TAO Pingan, CAO Yukun. Multi Body Rub-impact Response and Experiment of Rotary Vane Compressor[J]. Journal of Mechanical Engineering, 2024, 60(16): 429-440.

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