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Method and system for solving bucket retracting speed slowing of fixed-variable confluence system

A variable and speed technology, which is applied in the field of solving the problem of slowing the speed of closing the bucket after passing the center of gravity of the fixed-variable confluence system.

Active Publication Date: 2020-10-30
QINGDAO LOVOL EXCAVATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This application adopts the following method to solve the problem of slowing down of bucket closing speed:

Method used

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  • Method and system for solving bucket retracting speed slowing of fixed-variable confluence system
  • Method and system for solving bucket retracting speed slowing of fixed-variable confluence system
  • Method and system for solving bucket retracting speed slowing of fixed-variable confluence system

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Embodiment 1

[0027] The present invention solves the problem that the oil cylinder slows down during the movement process: the plunger pump and the gear pump start to supply oil together, the oil supply speed of the oil cylinder is sufficient and the speed is normal, and the pressure decreases after the center of gravity of the bucket passes the hinge point, so that the plunger pump no longer supplies oil. oil, causing only the gear pump to supply oil, and the reduction of oil volume leads to slower speed. In the present invention, the pilot oil source acts on the sequence valve core to force it to be in a confluence state, so that the plunger pump and the gear pump supply oil at the same time, and the speed remains constant.

[0028] A method for solving the slowing down of the closing speed of a fixed-variable confluence system, the steps comprising:

[0029] Add a pilot diversion pipeline to the pipeline connecting the pilot valve to the reversing valve in the constant variable confluen...

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PUM

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Abstract

The invention provides a method for solving bucket retracting speed slowing of a fixed-variable confluence system. The method comprises the steps that a pilot shunting pipeline is additionally arranged on a pipeline where a pilot valve is connected with a reversing valve in the fixed-variable confluence system; one end of the pilot shunting pipeline is connected with the pilot valve, and the otherend of the pilot shunting pipeline is connected with a valve element of a sequential valve in a confluence valve; and when the pilot valve works, pilot oil acts on the valve element of the sequentialvalve through the pilot shunting pipeline. According to the method, a one-way valve acts on the sequence valve in the confluence valve, so that the confluence state is ensured when the system pressure is low, the problem of bucket retracting speed slowing is solved at a lower cost while an existing confluence valve is not changed, the process speed of bucket retracting is kept unchanged, the bucket retracting time during operation of a loader is shortened, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of monitoring systems, in particular to a method for solving the problem of slowing down of the speed of a fixed-variable confluence system after the bucket passes the center of gravity. Background technique [0002] The bucket rotation of the loader is driven by the expansion and contraction of the bucket cylinder to pull the rocker arm and the pull rod to drive the bucket to rotate. In the fixed variable confluence hydraulic system, the power oil source is provided by the gear pump and the variable pump after converging through the confluence valve, the pilot valve provides the pilot oil source to push the reversing valve to reversing, and the power oil source is reversing through the reversing valve to push the bucket cylinder , to realize the action of the bucket cylinder. [0003] On the engineering vehicles that have applied the constant variable confluence system that has been publicized, the oil output from t...

Claims

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Application Information

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IPC IPC(8): E02F3/42E02F3/30
CPCE02F3/425E02F3/30
Inventor 宋赛陈维雄胡月平赵斌高宇霞
Owner QINGDAO LOVOL EXCAVATOR
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