Hydraulic system of coal mining machine

A technology for hydraulic systems and shearers, applied in the field of hydraulic systems, can solve the problems of scattered circuit components, low work efficiency, and slow optimization, so as to improve control accuracy, improve work efficiency, and prevent oil temperature from being too high or too low. Effect

Inactive Publication Date: 2011-06-29
HEBEI SHENFENG HEAVY MACHINERY
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  • Claims
  • Application Information

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Problems solved by technology

In addition, the surface coal mining machine itself is still in its infancy, and its own design is also in the stage of gradual optimization. The original hydraulic system adopts a simple throttling and speed regulation circuit. The circuit components are relatively scattered, with low work efficiency, high leakage, and integration Low

Method used

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  • Hydraulic system of coal mining machine
  • Hydraulic system of coal mining machine

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Embodiment Construction

[0012] figure 1 Among them, a hydraulic system of a coal mining machine is mainly composed of an oil tank 1, a variable pump 2, a variable mechanism 3, a four-way reversing valve 4, a hydraulic actuator 5, an auxiliary gear pump 6, a three-way reversing valve 7, and an overflow valve 8 and cooler 9, characterized in that: one end of the variable pump 2 is connected to the oil tank 1 through the oil suction filter through the pipeline, and the other end is connected to the four-way reversing valve 4 and the four-way reversing valve 4 through the variable mechanism 3 The load sensing circuit is connected to the variable mechanism 3, the variable mechanism 3 of the pump is connected to the control pump 2, the working oil port of each valve of the four-way reversing valve 4 is respectively connected to the hydraulic actuator 5, and the oil in the auxiliary hydraulic circuit passes through the gear pump 6 After connecting the two-position three-way reversing valve 7, connect the co...

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Abstract

The invention discloses a hydraulic system of a coal mining machine, which mainly comprises an oil tank, a variable pump, a variable mechanism, a four-way reversing valve, a hydraulic executing element, an auxiliary gear pump, three-way reversing valves, an overflow valve and a cooler, wherein one end of the variable pump is connected with the oil tank by a pipeline through an oil absorbing and filtering device. The hydraulic system of the coal mining machine provided by the invention has good power adaptability, and the output of the pump is dependent on the load requirement of the machine, so that power waste is effectively reduced. Additionally, with the integrated multi-way valve, the improvement of output pressure of the system is further facilitated, power weight ratio can be further improved, the electro-hydraulic proportion is controlled, and the control accuracy for an open-pit coal mining machine is further improved. Two three-way reversing valves are mounted in the hydraulic system, so that temperature of the oil can be adjusted with the variation of seasons, and the oil is prevented from being overheated.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a hydraulic system of a surface coal mining machine. Background technique [0002] Many open-pit coal mines in my country are mostly located in remote areas, the environment is harsh, and the temperature difference between seasons and regions varies greatly. Due to the special requirements of the working medium, the hydraulic system has a very critical requirement for the operating temperature of the oil. In addition, the surface coal mining machine itself is still in its infancy, and its own design is also in the stage of gradual optimization. The original hydraulic system adopts a simple throttling and speed regulation circuit. The circuit components are relatively scattered, with low work efficiency, high leakage, and integration Low. Contents of the invention [0003] The purpose of the present invention is to provide a shearer hydraulic system that can adapt to changes in ambient tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C31/02F15B11/02F15B21/04
Inventor 黄柏林岳艺明崔瑞祥丁孺琦王燕丽董鹏鹏张书田韩振华黄义刚
Owner HEBEI SHENFENG HEAVY MACHINERY
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