Multi-way valve with single oil duct and double valve elements in parallel connection and used for high-power excavator

A double-spool, parallel-connected technology, which is applied to mechanically driven excavators/dredgers, valve details, multi-way valves, etc., can solve the problem of large pressure loss in the hydraulic system, failure to meet high power requirements, and small flow area, etc. problems, to achieve the effects of simplified structure, guaranteed sealing performance, and simple connection of external pipelines

Inactive Publication Date: 2014-02-26
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing multi-way valve for excavators has a large pressure loss in the hydraulic system due to the small flow area of ​​the throttle port, and the small flow rate can not meet the high power demand, etc., and provides a single oil Road, double-spool parallel multi-way valve for large excavators

Method used

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  • Multi-way valve with single oil duct and double valve elements in parallel connection and used for high-power excavator
  • Multi-way valve with single oil duct and double valve elements in parallel connection and used for high-power excavator
  • Multi-way valve with single oil duct and double valve elements in parallel connection and used for high-power excavator

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Embodiment Construction

[0015] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, a multi-way valve for large-scale excavators with a single oil channel and double spools in parallel includes a spool 2, an end cover 3 is installed on one end of the spool 2, and a pilot control valve assembly 12 is installed on the other end. The end cover 3 is connected with the pilot control port pA port 4, the pilot control valve assembly 12 is connected with the pilot control port pB port 14, and the working oil circuit, the oil inlet circuit and the oil return circuit of the spool 2 are connected in parallel with the spool 2 Auxiliary spool 6 with the same structure; one end of the auxiliary spool 6 is equipped with an auxiliary spool end cover 5, the other end is equipped with an auxiliary spool pilot control valve assembly 13, and the pilot control port pA port 4 is connected to the auxiliary spool end Cover 5, pilot control port pB port 8 is connected to auxiliary spool pilot control...

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Abstract

The invention discloses a multi-way valve with a single oil duct and double valve elements in parallel connection and used for a high-power excavator. According to the multi-way valve used for the excavator, a pilot-operated-type structure is adopted, a cone valve structure is adopted in a pilot-operated stage and a sliding valve structure is adopted in a main valve stage. The multi-way valve has the advantages that the structure that the double valve elements are in parallel connection is adopted, and accordingly the multi-way valve can be applied to high-voltage and high-flow occasions; due to the fact that the two valve elements are in parallel connection, the area of a throttling hole is increased, loss of pressure in a system is reduced, and the utilization rate is improved; machining quality and sealing performance of the valve elements and valve holes are guaranteed; due to the design of the single oil duct and the double valve elements, space occupied by the multi-way valve is saved, and connection of external pipelines becomes easier.

Description

technical field [0001] The invention relates to a multi-way valve for a large excavator, in particular to a multi-way valve for an excavator with a maximum flow rate of more than 1000 L / min in the valve, which can meet the demand for high power. Background technique [0002] Hydraulic excavator is a kind of engineering machinery with typical functions, complicated working conditions and wide range of uses. It is mainly used in industrial and civil construction, mining, water conservancy and electric power construction, transportation, agricultural machinery engineering, oil field construction, port construction and military engineering construction. and other projects. [0003] In recent years, non-highway dump trucks used in large mines and water conservancy projects at home and abroad are constantly developing in the direction of large-scale. In order to adapt to the trend of large-scale dump trucks and ensure that they are compatible with dump trucks in joint operations, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/18
CPCE02F3/84F16K11/18F16K31/36
Inventor 刘金刚姚政彭柳絮张小鹏吴爽
Owner XIANGTAN UNIV
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