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Pressure release control method for mine dump truck accumulator

A technology of mining dump truck and control method, which is applied in the direction of fluid pressure actuating device, servo motor assembly, mechanical equipment, etc. The effect of convenient modification, simple structure and high reliability

Active Publication Date: 2018-06-26
柳工(常州)矿山机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for controlling the pressure release of the accumulator of the mining dump truck. Pressure release squeaky problem

Method used

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  • Pressure release control method for mine dump truck accumulator
  • Pressure release control method for mine dump truck accumulator
  • Pressure release control method for mine dump truck accumulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] figure 2 , image 3 The shown pressure relief control method for the accumulator of a mining dump truck adopts a pressure relief system for the accumulator of a mining dump truck;

[0021] The accumulator charging and discharging system for mining dump trucks includes an accumulator 3 connected to a hydraulic pump 5 through a charging valve assembly 1, a charging valve assembly 1, and a charging channel provided in the charging valve assembly 1. G and pressure relief channel X, the charging channel G is provided with a one-way valve 12, the accumulator 3 is connected to the hydraulic pump 5 through the charging channel G; and the pressure relief channel X of the charging valve assembly 1 is connected The pressure relief solenoid valve 11, the electronic control end of the pressure relief solenoid valve 11 and a pressure switch 6 are connected in series with the general electronic control unit 8 of the mining dump truck, and then connected to the power supply in series with...

Embodiment 2

[0025] Such as Figure 4 As shown, the main switch 7 is a single-pole double-throw switch; the rest are the same as the first embodiment.

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Abstract

The invention discloses a pressure relief control method for an energy accumulator of a mining dump truck, and belongs to the technical field of engineering machinery. The pressure relief control method comprises the following steps: when a main switch is turned off, a pressure in a system achieves a preset pressure range value of a pressure switch, a contact of the pressure switch is turned off, and meanwhile, a control end of a pressure relief electromagnetic valve is charged, the pressure relief electromagnetic valve is controlled to work at an upper position, pressure oil of the energy accumulator returns to an oil tank through the pressure relief electromagnetic valve, and a pressure of the energy accumulator is relieved; and when the pressure in the system is lowered to be out of the preset range of the pressure switch, the contact of the pressure switch is turned on, the control end of the pressure relief electromagnetic valve is uncharged, the pressure relief electromagnetic valve is controlled to work at a lower position, and the pressure relief is completed. The problems of incapacity of ensuring an emergency steering capability of the energy accumulator of the mining dump truck before safe stopping during the pressure relief, and a strange squeaking sound of throttle pressure relief can be solved.

Description

Technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a pressure relief control method for an accumulator of a mining dump truck. Background technique [0002] The accumulator of a mining dump truck is an energy storage device in the hydraulic and pneumatic system of a mining dump truck. In order to extend the service life of the expensive accumulator, the pressure needs to be relieved when it is stopped for a long time; figure 1 The shown accumulator charging and discharging system of a mining dump truck includes a steering module 22 corresponding to the charging valve assembly 21 and an accumulator 23 connected to the hydraulic pump 25 through the charging valve assembly 21, A hydraulically controlled pressure relief valve 211 is connected to the pressure relief passage of the charging valve assembly 21, and the pressure relief valve 211 controls the pressure relief of the accumulator 23 through the gearbox oil pressure 24...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B1/02F15B13/02
CPCF15B1/02F15B13/025
Inventor 吴韦林邓鸿彬朱长寿唐云娟李芸彭富民
Owner 柳工(常州)矿山机械有限公司