Pilot handle valve, hydraulic system of excavator and control method of hydraulic system

A pilot handle and hydraulic system technology, applied in pilot handle valves, excavator hydraulic systems and their control fields, can solve the problems of wasting the stroke of the ejector rod and affecting the micro-controllability of the handle, etc.

Active Publication Date: 2022-02-18
SHANDONG LINGONG CONSTR MACHINERY
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  • Abstract
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AI Technical Summary

Problems solved by technology

When the ejector rod stroke reaches L2, the secondary pressure provided is enough to make the oil inlet of the main valve reach the maximum opening. When the ejector rod stroke is L2~L3, the pressure is increased from P2 to P3, which wastes the ejector rod stroke and affects the handle micro controlling

Method used

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  • Pilot handle valve, hydraulic system of excavator and control method of hydraulic system
  • Pilot handle valve, hydraulic system of excavator and control method of hydraulic system
  • Pilot handle valve, hydraulic system of excavator and control method of hydraulic system

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Embodiment Construction

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific si...

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Abstract

The invention discloses a pilot handle valve, a hydraulic system of an excavator and a control method of the hydraulic system, which relate to the technical field of engineering machinery. The pilot handle valve comprises an operating handle and a pilot valve body, and the operating handle can control the pilot valve body to be opened or closed. The pilot valve body comprises an ejector rod, a valve body and a valve element, the ejector rod is arranged at the top of the valve body in a sliding mode, and a cavity allowing the valve element to penetrate is formed in one end of the ejector rod. The valve element is arranged in the valve body and sleeved with a spring seat and a metering spring, one end of the metering spring is fixedly connected with the spring seat, and the other end of the metering spring is fixedly connected with the valve element. The operating handle acts to drive the ejector rod to slide, the valve element can abut against the bottom of the cavity, the side, away from the ejector rod, of the spring seat can abut against the valve body, and the maximum distance between the valve element and the bottom of the cavity is equal to the maximum distance between the spring seat and the valve body and the abutting position of the spring seat.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a pilot handle valve, a hydraulic system of an excavator and a control method thereof. Background technique [0002] The pilot handle valve is mainly used for excavators and other construction machinery to control the pilot system oil circuit in the hydraulic system. The pilot oil source valve provides the working pressure of the pilot system oil circuit, controls the direction of the entire pilot system oil circuit, and controls the main valve to realize the corresponding operation of the actuator. Sub-action or combined action is an important part of the pilot control system. [0003] In the excavator, the pilot handle valve acts on the main valve core body in the excavator through the output secondary pressure to control the direction and displacement of the main valve core body, so as to realize the raising of the boom in the excavator, the lowering of the boom,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/04F15B11/08F16K11/22F16K27/02F16K31/36E02F9/22
CPCF15B13/0401F15B11/08F16K11/22F16K27/0263F16K31/36E02F9/22E02F9/2264E02F9/2267
Inventor 荆玉涛宋旭东董立队郭志学李宣辰
Owner SHANDONG LINGONG CONSTR MACHINERY
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