Electro-hydraulic proportional control system for mine hydraulic winch

An electro-hydraulic proportional, hydraulic winch technology, applied in the direction of the hoisting device, the spring mechanism, etc., can solve the problems of poor driving and braking synergy, poor speed regulation stability, low automation level, etc., to avoid system pressure shock, The effect of improving reliability and reducing the cost of retrofitting

Active Publication Date: 2016-01-06
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

[0011] Purpose of the invention: In order to solve the problems of low automation level, low speed regulation accuracy, poor speed regulation stability and poor coordination between driving and braking in mining hydraulic winches, an electro-hydraulic proportional control system for mining hydraulic winches is proposed

Method used

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  • Electro-hydraulic proportional control system for mine hydraulic winch
  • Electro-hydraulic proportional control system for mine hydraulic winch
  • Electro-hydraulic proportional control system for mine hydraulic winch

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Such as figure 2 As shown, an electro-hydraulic proportional control system for a hydraulic winch used in an open mine includes an electro-hydraulic proportional drive part and an electro-hydraulic proportional brake part.

[0030] The electro-hydraulic proportional driving part includes a driving pump station, a rotary encoder 115 , a controller 112 , an amplifier 104 , an electro-hydraulic proportional pressure reducing valve 101 , an electromagnetic reversing valve 102 and a driving handle 114 . Wherein, the driving pumping station includes oil tank 201, coarse oil filter 202, stop valve 203, double vane pump 204, auxiliary motor 205, fine oil filter 206 and 208, overflow valve 207 and 210, pressure reducing valve 209 and 214 . The oil inlet end of the coarse oil filter 202 is connected to the tank 201, and its oil outlet is connected to the oil inlet of t...

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Abstract

The invention discloses an electro-hydraulic proportional control system for a mine hydraulic winch. The electro-hydraulic proportional control system comprises a proportional driving system and a proportional braking system. In the proportional driving system, a pressure reducing pilot valve is replaced with an electro-hydraulic proportional pressure reducing valve, the rotating speed of a motor is in closed-loop control by changing the displacement of a variable displacement pump, and the control level, speed control precision and rotating speed stability of the driving system are improved; in the braking system, a brake pump station supplies an independent oil source to a brake circuit, and brake oil pressure is adjusted by adopting a proportional overflow valve, so that a brake force of the hydraulic motor can be independently adjusted; and through the adoption of double-handle control, driving and braking are independently controlled, which is beneficial to enhance the cooperativity of driving and braking and reduce pressure impact. The electro-hydraulic proportional control system is suitable for a pump control motor volumetric speed control system with large inertia and a higher requirement for speed control precision, such as the mine hydraulic winch.

Description

technical field [0001] The invention relates to a control system of a hydraulic winch, in particular to an electro-hydraulic proportional control system of a mining explosion-proof hydraulic winch. Background technique [0002] At present, the hydraulic winch is widely used in coal mines because of its superior explosion-proof performance and good volume speed regulation. It is the main equipment for lifting coal and gangue, lifting materials, equipment and personnel in high-gas mines. Its operation The pros and cons of the state have a major impact on the safe production and efficient operation of coal mines. [0003] figure 1 It is the hydraulic control schematic diagram of the traditional hydraulic winch. The driver pulls the control handle 232 to adjust the output pressure of the decompression pilot valve 211 to control the displacement of the piston rod of the proportional cylinder 212; The oil cylinder 216 constitutes a machine-hydraulic position servo, and the pist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66D1/44B66D1/54
Inventor 丁海港赵继云邓世建李光洲黄剑
Owner CHINA UNIV OF MINING & TECH
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