A device and method for adjusting the height of a shearer drum based on motor drive control

Abstract

The invention discloses a coal mining machine drum height regulating device based on motor drive control. The device comprises an alternating current servo motor (1), a bidirectional quantitative pump (2), two-position four-way electromagnetic reversing valves (3), hydraulic control one-way valves (4) and a control feedback module (9); the control feedback module (9) obtains the actual position of an executive component hydraulic cylinder (5) through a displacement sensor (6), conducts feedback control, controls the alternating current servo motor (1) and the two-position four-way electromagnetic reversing valves (3) through a motor controller and an electromagnetic directional valve controller, adjusts a hydraulic loop and drives the hydraulic cylinder (5) to reach the expected position. The invention further discloses a method for adjusting the height through the device; the functions of a flow control valve, a direction control valve and a pressure control valve are replaced with the speed change function, the direction change function and the torque change function of a motor body, the throttle loss in the hydraulic loop is eliminated, the structure of the hydraulic loop is simplified, and automatic adjustment of the height of a coal mining machine drum is achieved.

Description

technical field [0001] The invention relates to a device and method for adjusting the height of a shearer drum based on motor drive control, and belongs to the technical field of mining shearers. Background technique [0002] With the increasing importance of coal mine safety and the application of advanced coal mining technology, less or even unmanned underground coal mining is a future development trend, and the mechanization and automation of coal mining equipment is a necessary condition for realizing this trend . At this stage, in terms of height adjustment control of the shearer drum, most coal mining operations still rely on manual operation to adjust the height of the drum, that is, the operator relies on visual observation to judge whether the shearer is cutting coal or rock, so as to adjust the drum. vertical height. [0003] On the one hand, due to the large amount of dust produced by the shearer during work, which reduces visibility, it is difficult for operato...

AI Technical Summary

Problems solved by technology

[0004] For example, Chinese patent CN201220240381.7 discloses a fully automatic real-time height adjustment device for the rocker arm of a coal mining machine. The height adjustment device is provided with a control valve on the oil supply pipeline to control the flow and pressure of the hydraulic circuit. This method is not possible. Avoid throttling loss, and the hydraulic circuit is more complicated

[0005] Another example is the Chinese patent document CN201510082422.2 which discloses a shearer and its working method for realizing automatic height adjustment of the drum. In this method, an electromagnetic proportional valve is set on the height adjustment hydraulic pipeline, which will also cause throttling loss.

[0006] To sum up, the existing height adjustment devices and methods have defects such as relatively complex hydraulic circuits and serious throttling losses.

Images