Direct-drive hydraulic transmission coal mining machine cutting rotary drum height regulating system and method

A technology of hydraulic transmission and cutting drum, which is applied in the direction of cutting machinery, earth drilling, cutting machinery, etc. It can solve the problems of complex hydraulic circuit structure and hydraulic circuit throttling loss, so as to simplify the structure and eliminate throttling loss Effect

Active Publication Date: 2016-03-23
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Usually, the hydraulic system is controlled by the valve of the roller height adjustment mechanism, and its speed change, direction change and torque change are controlled by high-power energy-consuming components su

Method used

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  • Direct-drive hydraulic transmission coal mining machine cutting rotary drum height regulating system and method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing.

[0027] Such as figure 1 As shown, the present invention is a cutting drum height adjustment system for a direct-drive hydraulic transmission coal shearer, which includes:

[0028] Frequency conversion control device 4, servo motor 1, hydraulic pump 2, hydraulic motor 3 connected in sequence;

[0029] The output shaft of the hydraulic motor 3 is hinged with a rocker arm 5, and the top of the rocker arm 5 is provided with a roller 6;

[0030] The rocker arm 5 is also provided with a detection device 7 that detects the steering, rotational speed and torque signal of the rocker arm 5, and the detection device 7 transmits the detected actual value to the preset value of the frequency conversion control device 4 for comparison, feedback control.

[0031] Wherein, the circuit between the hydraulic pump 2 and the hydraulic motor 3 is also provided with a main safety valve 10 for...

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Abstract

The invention discloses a direct-drive hydraulic transmission coal mining machine cutting rotary drum height regulating system. The system comprises a variable-frequency control device (4), a servo electric motor (1), a hydraulic pump (2) and a hydraulic motor (3) which are sequentially connected, wherein an output shaft of the hydraulic motor (3) is hinged to a rocker arm (5); the top of the rocker arm (5) is provided with a rotary drum (6); a detection device (7) used for detecting the rotating direction, the rotating speed and torque signals of the rocker arm (5) is also arranged on the rocker arm (5); and the detection device (7) transmits the actual detection value to the variable-frequency control device (4) to be compared with a preset value and to perform feedback control. Meanwhile, the invention also discloses a height regulating method using the system. When the variable-frequency hydraulic system is used, the electric motor drives the hydraulic pump and can directly realize the speed change, direction change and torque change functions of a height regulating mechanism at the same time; a hydraulic loop structure of the system is greatly simplified; meanwhile, the throttle loss in the hydraulic loop is eliminated; and the obvious energy-saving effect is achieved.

Description

technical field [0001] The invention relates to a shearer height adjustment system for a shearer, in particular to a direct-drive hydraulic transmission shearer height adjustment system and method, and belongs to the technical field of mining shearers. Background technique [0002] With the rapid development of coal mining technology and the increasing importance of coal mine safety, it has become an inevitable trend to realize the mining of underground coal mining face with few or no people. The necessary condition is to realize the mechanization and automation of underground coal mining equipment. [0003] The coal shearer is the main coal falling equipment, and its automatic control mainly includes frequency conversion traction and intelligent height adjustment of the cutting drum. Among them, the automatic height adjustment of the cutting drum means that when the shearer is pulling and moving, the front and rear drums need to be automatically adjusted along the coal-rock...

Claims

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Application Information

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IPC IPC(8): E21C35/24E21C25/06
CPCE21C25/06E21C35/24
Inventor 李威刘玉飞许少毅魏华贤王世博刘万里徐晗路恩鞠锦勇王茗杨康盛连超司卓印张金尧须晓锋董事
Owner CHINA UNIV OF MINING & TECH
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