Large-inclined-angle coal cutter dragging control device and control method

Abstract

The invention discloses a large-inclined-angle coal cutter dragging control device and control method. The large-inclined-angle coal cutter dragging control device comprises a walking mechanism, a traction mechanism and an electrical control mechanism. The electrical control mechanism comprises a controller, a main frequency changer, a first auxiliary frequency changer and a second auxiliary frequency changer, wherein the first auxiliary frequency changer and the second auxiliary frequency changer are in communication with the main frequency changer. The invention simultaneously discloses a large-inclined-angle coal cutter dragging control method. The method comprises the following steps that 1, walking of a coal cutter is controlled; 2, it is detected that whether traction motors overload or underload; and 3, it is detected that whether the frequency changers fail or not. According to the large-inclined-angle coal cutter dragging control device and control method, the three frequency changers adopt the control way of one main and two auxiliaries, the traction mechanism overload or underload detecting function is achieved, the frequency changer failure detecting function is achieved, on the basis of maintaining the first traction motor, the second traction motor and the third traction motor be at synchronous operation, the traction motors are prevented from overloading or underloading, any one of the frequency changers fails, the coal cutter stops working, failure expansion is avoided, and damages of equipment of the coal cutter are reduced.

Description

technical field [0001] The invention belongs to the technical field of coal shearers, and in particular relates to a drag control device and a control method for a large-inclination coal shearer. Background technique [0002] my country's coal resources are relatively rich, and the coal seam structure is complex. Among them, there are a large number of high-inclination coal seams. For example, most of the coal seams in Southwest China and Ningxia are high-slope coal seams. Under the conditions of fully mechanized mining working faces with large inclination angles in China, since most of the existing shearers are dual-drive shearers, dual-drive shearers can also carry out upward coal mining on working faces with a mining height of less than 5 meters and a slope of less than 30 degrees. However, when mining coal on a steep working face with a slope of more than 30 degrees, due to the heavy weight of the dual-drive shearer, it can only run empty when going up, and often slips w...

AI Technical Summary

Problems solved by technology

Under the conditions of fully mechanized mining working faces with large inclination angles in China, since most of the existing shearers are dual-drive shearers, dual-drive shearers can also carry out upward coal mining on working faces with a mining height of less than 5 meters and a slope of less than 30 degrees. However, when mining coal on a working face with a slope of more than 30 degrees, due to the heavy weight of the double-drive shearer, it can only walk with an empty knife when going up, and it often falls when starting up, so the work efficiency is relatively low.

[0003] At present, there are three-drive shearers designed for working faces with large mining heights and large inclination angles, but the current three-drive shearers only increase the traction force of the shearer, and there are no other measures to ensure the three traction units of the three-drive shearer Because the three-drive shearer has three traction units, when one of the traction units is damaged due to excessive output, the other two traction units will continue to work, which will easily cause the other two traction units of the shearer to be overloaded, not only Therefore, a coal shearer with simple structure and reasonable design, three frequency converters drive three traction units, and three traction units drive the walking mechanism of the coal shearer, which ensures that the coal shearer is It can have enough traction force when mining coal on the large slope working face, and can work normally on the working face with a slope exceeding 45 degrees. It also has frequency converter fault detection. When one of the frequency converters fails, the shearer will stop running to avoid failure magnification

Images