Research on mechanism of high-quality conformal grinding of carbon brushes based on a new device

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0026

Abstract

Abstract:

To solve the problem of poor conformal grinding effect of carbon brushes used in phase-shifting cameras and improve the grinding quality of carbon brushes, a new type of carbon brush grinding device was first adopted to analyze the process of conformal grinding of carbon brushes and the friction mechanism of the friction contact surface. Secondly, a kinematic model of the structure was established, and Adams simulation was used to analyze errors. Then, under the influence of system bias, the friction mechanism was analyzed from both macro and micro perspectives. Finally, through theoretical relationship calculation, the influence of roughness on friction under this system bias was analyzed, and the relationship between roughness and friction was explored. The results show that the device has high reliability, but there are still trace system deviations, with deviation values ranging from 0.002 to 0.017. Through formula deduction and analysis, it is found that the wear rate at the macro level decreases exponentially, while at the micro level, a three-body friction is formed. There is a positive correlation between the friction force between the carbon brush and the grinding wheel block and the standard deviation of the contour height of the contact surface between them.

Key words: carbon brush grinding, friction mechanism, friction, kinematics, roughness

CLC Number:

X941

LI Qingjian, BAI Tong, ZHANG Jinpeng, WANG Da, XIE Miao, TIAN Bo. Research on mechanism of high-quality conformal grinding of carbon brushes based on a new device[J]. China Safety Science Journal, 2023, 33(S2): 209-215.

Figures/Tables 9

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