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Excavator hydraulic control method and control system

A control method and technology for excavators, which are applied in the direction of earthmoving machines/shovels, construction, etc., can solve problems such as the occurrence of nodding phenomenon, and achieve the effects of improving movement coordination, slowing down recovery speed, and eliminating flat nodding.

Active Publication Date: 2020-07-21
LIUZHOU LIUGONG EXCAVATORS +2
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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 hydraulic control system for an excavator aiming at the problem of nodding when the existing excavator performs leveling operations

Method used

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  • Excavator hydraulic control method and control system

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Embodiment Construction

[0021] The specific implementation will be described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, the excavator hydraulic control system in this embodiment includes a left pump 14, a right pump 13, a pilot pump 12, a stick cylinder control valve, a boom cylinder control valve, a bucket cylinder control valve 7, and a right pilot valve 20 , left pilot valve 22, stick regeneration control valve; also includes controller 15, boom lift pilot pressure sensor 18 connected with the controller, bucket recovery pilot pressure sensor 19, stick recovery pilot pressure sensor 21; stick cylinder The control valve includes the arm confluence valve 3 and the arm control valve 5; the boom cylinder control valve includes the arm control valve 17 and the arm confluence valve 9; the pump port of the right pump 13 passes through a one-way valve and the arm control valve 5 The working oil inlet of the left pump 14 is connected with the working oil inlet...

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Abstract

The invention relates to a hydraulic system of an excavator. In order to solve the problem that an existing excavator has a nodding phenomenon during working on a flat ground, the invention provides ahydraulic control method for the excavator. A bucket rod regeneration control valve is arranged on an oil return oil path of a bucket rod control valve of the excavator; and when the excavator is ina state of working on the flat ground, the opening degree of a valve port of the bucket rod regeneration control valve is controlled to meet the requirement that the opening degree of the valve port of the bucket rod regeneration control valve at the initial stage of bucket rod recycling is greater than that of the valve port of the bucket rod regeneration control valve at the later stage of bucket rod recycling. According to the hydraulic control method for the excavator, when the excavator is in the state of working on the flat ground, the opening degree of the valve port of the bucket rod regeneration control valve is controlled to meet the requirement that the opening degree of the valve port of the bucket rod regeneration control valve at the initial stage of bucket rod recycling is greater than that of the valve port of the bucket rod regeneration control valve at the later stage of bucket rod recycling, so that the bucket rod regeneration amount can be adjusted to achieve effects of slowing down the bucket rod recycling, improving the harmoniousness of operation and eliminating the nodding phenomenon on the flat ground.

Description

technical field [0001] The present invention relates to an excavator, more specifically, to an excavator hydraulic control system. Background technique [0002] In the various operating conditions of excavators, leveling operations account for a large proportion. The leveling performance of excavators has a direct impact on work efficiency and operating comfort, and is an important indicator that users pay more attention to. At present, when the excavator is performing leveling operations (i.e. stick recovery + boom lifting composite operation), due to the effect of gravity, the recovery speed of the stick is faster than the lifting speed of the boom, which leads to the phenomenon of nodding, which is specifically manifested as starting from the level ground. A shallow pit will be dug at the beginning, which will affect the leveling effect and reduce work efficiency. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a hyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/22
CPCE02F9/2264E02F9/2267E02F9/2289
Inventor 王茄任李文新梁明孔董必成刘建毕金敏
Owner LIUZHOU LIUGONG EXCAVATORS
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