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A method and system for solving the slowdown of bucket closing speed in 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: 2022-02-01
QINGDAO LOVOL EXCAVATOR
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  • 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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  • A method and system for solving the slowdown of bucket closing speed in fixed variable confluence system
  • A method and system for solving the slowdown of bucket closing speed in fixed variable confluence system
  • A method and system for solving the slowdown of bucket closing speed in 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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Abstract

The invention provides a method for solving the problem of slowing down of the closing speed of the fixed-variable confluence system. The steps include: adding a pilot diversion pipeline to the pipeline connecting the pilot valve to the reversing valve in the constant-variable confluence system; one end of the pilot diversion pipeline It is connected with the pilot valve, and the other end is connected with the spool of the sequence valve in the confluence valve; when the pilot valve is working, the pilot oil acts on the spool of the sequence valve through the pilot diversion pipeline; the invention acts on the sequence valve in the confluence valve through the one-way valve, When the system pressure is low, the confluence state is guaranteed. While the existing confluence valve is not changed, the problem of slow bucket retraction is solved at a low cost, and the speed of the bucket retraction process is kept constant, thereby shortening the bucket retraction time during the loader operation. ,Improved work efficiency.

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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Patent Type & Authority Patents(China)
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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