采煤机截割部齿轮箱体振动特性实验

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Abstract Here, dynamic characteristics of shearer cutting gearbox (SCG) were investigated with tests based on the national coal mining equipment test center. A test platform was constructed according to a fully mechanized coal mining face to actually imitate downhole coal mining process. According to the fully mechanized mining technique, test working conditions were set as no-load, straight line cutting and oblique one to acquire vibration acceleration data of gearbox, perform analyses in time domain and frequency one for these data, and explore effects of cutting depth, traction speed and hardness of coal layer, etc. key parameters on dynamic characteristics of SCR. A finite element model of SCG was established to do numerical simulation. The simulation results were compared with the test ones. Results showed that both results agree well with each other; vertical vibration of cutting head is the maximum, vibration amplitude increases with increase in cutting depth, traction speed and hardness; beat phenomena occur in oblique cutting process and these phenomena decrease with increase in cutting load; coupling phenomena among meshing frequencies of various transmission stages in gear system happen, coupled frequencies become the main parts of dominant frequencies; vibration of SCG is mainly caused by gear system mesh nonlinear vibration, frequencies coupling can cause more exciting frequency components to increase the possibility of local resonance of SCG; the study results provide a reference for design and reliability analysis of SCR.

Key words： :Dynamic Shearer Cutting gearbox vibration experiment beat phenomenon

Received: 13 March 2018 Published: 28 June 2019

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	Articles by authors
	ZHANG Rui1
	ZHANG Yimin2
	ZHU Lisha2

Cite this article:

ZHANG Rui1,ZHANG Yimin2,ZHU Lisha2. Tests for dynamic characteristics of shearer cutting gearbox[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(13): 179-184.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I13/179

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