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Priority valve and hydraulic steering system

A steering system and priority valve technology, applied in the field of hydraulic valves, can solve the problems of insufficient pressure and hydraulic pressure, long distance between the priority valve and steering gear, and laborious operators, so as to avoid insufficient pressure difference.

Pending Publication Date: 2020-04-03
SANY MARINE HEAVY IND
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Problems solved by technology

[0005] The purpose of the present invention is to provide a priority valve and a hydraulic steering system to solve the problem in the prior art that the distance between the priority valve and the steering gear is arranged far away, resulting in insufficient pressure difference of the pressure fluid supplied to the steering gear by the priority valve, causing the operator to Turning to laborious technical issues

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  • Priority valve and hydraulic steering system
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Embodiment Construction

[0038] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039]It should be noted that in the description of the present invention, the terms "first", "second" and "third" are used for description purposes only, and cannot be understood as indicating or implying relative importance. Unless otherwise clearly stipulated and limited, the terms "connection" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be directly connected or through an intermediary Connected; eithe...

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Abstract

The invention provides a priority valve and a hydraulic steering system, relates to the field of hydraulic valves, and aims to solve the problem of strenuous steering of an operator due to insufficient pressure difference of pressure liquid supplied to a steering gear by the priority valve. The priority valve comprises a valve body and a valve element; the valve body is provided with a first pressure liquid port, a CF liquid port, an EF liquid port, a first pressure cavity and a second pressure cavity; the first pressure liquid port is communicated with an output port of the hydraulic pump, the EF liquid port is communicated with the hydraulic device, and the second pressure cavity is communicated with a first control liquid port of the steering gear; the CF liquid port is communicated with a second pressure liquid port of the steering gear through a first outer pipeline, and the first pressure cavity is communicated with the second pressure liquid port of the steering gear through a second outer pipeline; the first end of the valve element is arranged in the first pressure cavity in a penetrating mode, the second end of the valve element is arranged in the second pressure cavity in a penetrating mode, the second end of the valve element bears preset pressure, and the valve element can reciprocate between the first pressure cavity and the second pressure cavity so as to adjustthe flow of the CF liquid port and the flow of the EF liquid port.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a priority valve and a hydraulic steering system. Background technique [0002] With the development of society and the continuous advancement of science and technology, various handling and transportation equipment have been widely used. Whether it is a car for road transport or a mobile handling device for handling, it is inseparable from the steering system. [0003] The hydraulic steering system is the most common steering system. In the prior art, the hydraulic steering system includes a hydraulic pump, a priority valve, a steering gear, and a steering cylinder. The hydraulic pump outputs pressure fluid driven by the engine, and the pressure fluid passes through the priority valve. It is distributed with the joint action of the steering gear. When the operator performs a steering operation, the pressure fluid is input to the steering cylinder, and the steering cyli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/08B62D5/06
CPCB62D5/061B62D5/08
Inventor 杨浪史超平黄海游
Owner SANY MARINE HEAVY IND
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