An Electro-hydraulic Proportional Control System for Mining Hydraulic Winch

A technology of electro-hydraulic proportional and hydraulic winch, which is applied in hoisting devices and clockwork mechanisms, etc., can solve problems such as poor coordination between drive and brake, low automation level, and poor speed regulation stability, so as to avoid system pressure shock, Retrofit costs are low and reliability is improved

Active Publication Date: 2018-01-02
CHINA UNIV OF MINING & TECH
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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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  • An Electro-hydraulic Proportional Control System for Mining Hydraulic Winch
  • An Electro-hydraulic Proportional Control System for Mining Hydraulic Winch
  • An Electro-hydraulic Proportional Control System for Mining 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 box 201, and the oil outlet end is connected to the oil inlet p...

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Abstract

The invention discloses an electro-hydraulic proportional control system of a mining hydraulic winch, which comprises a proportional driving system and a proportional braking system. The drive system uses an electro-hydraulic proportional pressure reducing valve instead of a pressure reducing pilot valve. By changing the displacement of the variable pump to control the motor speed in a closed loop, the control level, speed regulation accuracy and speed stability of the system are improved; in the braking system, The brake pump station provides an independent oil source for the brake circuit, and adopts a proportional relief valve to adjust the brake oil pressure, so that the braking force of the hydraulic motor can be adjusted independently; it adopts double handle control, so that the drive and brake can be independently controlled, and there is It helps to enhance the synergy of driving and braking and reduce pressure shock. The present invention is suitable for a pump-controlled motor volumetric speed regulation system with large inertia and high requirements for speed regulation precision, such as mining hydraulic winches and the like.

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 Patents(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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