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Load sensing multi-way reversing valve and loader hydraulic control system

A multi-way reversing valve and load sensing technology, which is applied in the field of hydraulic components, can solve the problems of complex structure and high cost of the load sensing multi-way reversing valve, and achieve the goals of improved work efficiency, small pressure loss, and reduced pressure loss Effect

Active Publication Date: 2017-05-31
GUANGXI LIUGONG MASCH CO LTD
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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 load sensing multi-way directional valve with a simple structure and low cost and a load sensing multi-way directional valve with the load sensing multi-way directional Loader Hydraulic Control System Based on Sensing Multi-way Reversing Valve

Method used

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  • Load sensing multi-way reversing valve and loader hydraulic control system
  • Load sensing multi-way reversing valve and loader hydraulic control system

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Embodiment Construction

[0023] The specific implementation will be described below in conjunction with the accompanying drawings.

[0024] The load sensing multi-way reversing valve in this embodiment is as figure 1 As shown, it has oil inlet P port, oil return T port, oil return port T1, load signal output LS port, external control K port for communicating with the external oil circuit, and includes pressure compensator 10, pre-valve compensation valve 2 , the flow control valve 8 , the first reversing unit 30 and the second reversing unit 50 . The pressure compensator, pre-valve compensation valve and flow control valve are connected between the first reversing unit, the second reversing unit and the oil inlet port P of the reversing valve;

[0025] The pressure compensator 10 is composed of a relief valve 11 and a differential relief valve 12. The oil inlet of the pressure compensator 10, that is, the oil inlet of the differential relief valve 12 communicates with the oil inlet P port. The oil o...

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Abstract

The invention relates to a hydraulic component, solves the problems that a conventional load sensing multi-way directional valve is complicated in structure and high in cost, and provides a load sensing multi-way directional valve which comprises a first directional unit and a second directional unit; a pressure compensator, an upstream compensation valve and a flow control valve are mounted among the first directional valve, the second directional valve and an opening of a directional valve oil inlet; a load signal output opening of the first directional unit is connected with one oil inlet of a shuttle valve; a load signal output opening of the second directional valve is connected with another oil inlet of the shuttle valve; an oil outlet of the shuttle valve is connected with a load signal output LS opening, an LS control opening of the upstream compensation valve and an LS control opening of the pressure compensator; and a hydraulic end of the flow control valve is communicated with an external control K opening. The load sensing multi-way directional valve is simple in structure and low in cost.

Description

technical field [0001] The invention relates to a hydraulic component, in particular to a load sensing multi-way reversing valve and a loader hydraulic control system. Background technique [0002] At present, some construction machinery on the market, especially the working hydraulic system of loaders, generally use quantitative systems. The components of quantitative systems have cost advantages, but their efficiency is low and they are not energy-saving. With the influence of the external environment such as the national energy saving policy and the customer's demand for low fuel consumption, the energy saving technology of the hydraulic system has become a hot research topic. The load sensing system is gradually being used in domestic agricultural machinery and engineering Machinery, etc. have been applied, and are favored by the majority of host manufacturers. As the main component of the load sensing system, the load sensing multi-way reversing valve has been widely u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F15B11/00E02F9/22
Inventor 初长祥王允李泽华范武德谭艳辉梁振国
Owner GUANGXI LIUGONG MASCH CO LTD
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