Simulative cutting experiment device for coal mining machine

Abstract

The invention discloses a simulative cutting experiment device for a coal mining machine. The simulative cutting experiment device comprises a device body and a coal walling simulating mechanism; the device body is provided with a cutting mechanism, a first driving mechanism drives the cutting mechanism to move along a rail, and a second driving mechanism drives the cutting mechanism to vertically move. On one hand, the whole experiment device adopts the modular design, all the parts are integrated on the device body and a base, simulation on height adjusting motion, traction motion and coal rock cutting of the coal mining machine can be simultaneously achieved, and assembly and disassembly are convenient; on the other hand, the first driving mechanism and the second driving mechanism are both controlled by electro-hydraulic proportional valves, therefore, precise control cover the cutting drum height adjusting speed, the device body traction speed and the cutting drum height can be achieved, the working condition that the coal mining machine cuts coal rock underground can be simulated more truly, simulation loading on the electro-hydraulic proportional cutting mechanism in the experiment device is achieved, and an integrated platform is supplied to experimental study on simulative cutting of the coal mining machine and the electro-hydraulic proportional height adjusting system characteristics.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a shearer simulation cutting experiment device. Background technique [0002] The automatic height adjustment technology of the shearer cutting drum is one of the important key technologies to realize the automation of the coal mining face. However, the existing shearer drum height adjustment system generally adopts the switch valve control cylinder control system. Only the opening and closing time of the hand hydraulic directional valve can be controlled, but the flow cannot be directly controlled by the hand hydraulic directional valve, and it is also difficult to adapt to the requirements of high power and large inertial loads. High precision control, the stability of the system is also poor. [0003] Therefore, it is very necessary to carry out electro-hydraulic proportional transformation on the existing shearer height adjustment hydraulic system to realize precise cont...

AI Technical Summary

Problems solved by technology

[0002] The automatic height adjustment technology of the shearer cutting drum is one of the important key technologies to realize the automation of the coal mining face. However, the existing shearer drum height adjustment system generally adopts the switch valve control cylinder control system. Only the opening and closing time of the hand hydraulic directional valve can be controlled, but the flow cannot be directly controlled by the hand hydraulic directional valve, and it is difficult to adapt to the requirements of high power and large inertia load. Highly precise control, the stability of the system is also poor

[0003] Therefore, it is very necessary to carry out the electro-hydraulic proportional transformation of the existing shearer height adjustment hydraulic system to realize the precise control of the height adjustment oil cylinder flow and the complex control strategy adapted to it. Most of the research work is focused on theoretical research, control methods, and modeling and simulation, and related experimental research is relatively lacking, especially the experimental research on the combination of increasing the electro-hydraulic ratio of the shearer and cutting coal and rock with the shearer drum has not yet been carried out. ; The patent application number is 201010160904.2 for the automatic height adjustment experimental device and control method of the shearer drum, although a kind of internal feedback control method and corresponding experimental device scheme based on the height adjustment oil cylinder, rocker swing angle and fuselage inclination angle are proposed, considering The influence of rocker arm and drum self-weight and moment of inertia on the height adjustment system is considered, but the whole scheme lacks the simulation of shearer drum cutting coal rock and shearer traction movement, ignoring the shearer drum cutting load and traction Influence of Speed ​​on Height Adjustment of Coal Shearer Drum

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