Device and method for monitoring friction fatigue of heavy-duty scraper conveyor sprocket under vibration shock

Abstract

The invention discloses a friction fatigue monitoring device and a method of heavy-loading scraper conveyer chain wheels under vibration impact. The friction fatigue monitoring device comprises a base support, a driving system, a circular chain tensioning system, an impact loading system, a coal slime scattering system, and a monitoring system; the driving system comprises a low-speed servo motor, a first low-speed coupler used for connecting the low-speed servo motor with a torque sensor, a second low-speed coupler used for connecting the torque sensor with a transmission shaft, a roller A connected with the transmission shaft, driving chain wheels connected with the roller A, driven chain wheels connected with a roller B via key connection, a circular chain used for winding the driving chain wheels and the driven chain wheels; the circular chain tensioning system comprises a liner and a horizontal electric cylinder connected with a tail frame; the impact loading system comprises an impacting plate connected with a vertical electric cylinder; and the coal slime scattering system comprises a sieve and a vibration exciter. The friction fatigue monitoring device is capable of stimulating friction fatigue fracture of heavy-loading scraper conveyer chain wheels under vibration impact, and monitoring chain wheel fatigue damage and chain wheel wear situations.

Description

technical field [0001] The invention relates to the field of mining technology, in particular to an experimental monitoring device and method for friction fatigue fracture of a chain wheel of a heavy-duty scraper conveyor under vibration and impact conditions. Background technique [0002] Fully mechanized mining technology is the most advanced underground mining technology today, and the scraper conveyor is one of the key fully mechanized mining equipment. It not only plays the role of coal transportation, but also the running track of the coal shearer. With the continuous development of fully mechanized mining technology, as well as the large-scale and deep mines, the scraper conveyor continues to develop in the direction of high power, long distance and high chain speed, that is, the heavy-duty scraper conveyor. Once the heavy-duty scraper conveyor fails due to failure, it will lead to the shutdown of the coal mining face, which will lead to major economic losses in large...

AI Technical Summary

Problems solved by technology

Patent No. CN201420187267.1 discloses an experimental device for monitoring chain misalignment, scraper deflection, and tail wheel rotation speed unevenness. However, no one has proposed a method that can simulate the friction of scraper conveyor sprocket under vibration and shock conditions. Monitoring device and method for fatigue fracture experiment

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