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A mechanical hydraulic oil source selection valve

A technology of hydraulic oil source and selection valve, applied in the hydraulic field, can solve the problems of inconvenient use, poor reliability, low integration, etc., and achieve the effects of fast automatic switching, improved reliability and novel principle

Active Publication Date: 2016-10-26
SHANGHAI XINYUE METER FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional oil source switching system has complex composition, low integration, poor reliability, inconvenient use and high cost

Method used

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  • A mechanical hydraulic oil source selection valve
  • A mechanical hydraulic oil source selection valve
  • A mechanical hydraulic oil source selection valve

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Embodiment Construction

[0027] Hereinafter, in conjunction with the accompanying drawings, a preferred embodiment is described in detail to further illustrate the present invention.

[0028] Such as figure 1 , 2 , 3; a mechanical hydraulic oil source selection valve, which includes: a main stage structure, which is a two-position three-way hydraulic slide valve structure, the main stage structure includes: the main valve body 1, set in the main valve The main valve core 11 in the valve cavity of the body 1, and the pilot control chamber 111 and the main spring 112 respectively located at both ends of the main valve core 11. The main spring 112 is fixed by the main spring seat 12; the inlet A of the main stage structure is connected The main oil source and inlet B are connected to the backup oil source, and the outlet O of the main stage structure is connected to the oil supply port.

[0029] The mechanical hydraulic oil source selection valve further includes: a pilot stage structure, which is a spool val...

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Abstract

A mechanical hydraulic oil source selecting valve comprises a main level structure and a pilot level structure, wherein the main level structure adopts a two-position three-way hydraulic slide valve structure; the pilot level structure adopts a slide valve structure; the pilot level structure is connected with a pilot control cavity of the main level structure through a hydraulic pilot oilway, and is further connected with a main oil source and a spare oil source respectively; the hydraulic pilot oilway has pilot hydraulic pressure; the pilot level structure compares pressure difference between the main oil source and the spare oil source in a mechanical way, and controls the pilot hydraulic pressure in the hydraulic pilot oilway through a comparison result, so that a main valve core of the main level structure does reversing motion under the action of the pressure difference between the pilot control cavity and a main spring to change communicating relations between the main and spare oil sources and an outlet O, and further, the switching oil supply of the main oil source and the spare oil source is achieved. The mechanical hydraulic oil source selecting valve has the advantages as follows: by adopting two-level hydraulic valve structure, main valve switching is implemented through the hydraulic pilot oilway, so that the principle is novel; the mechanical hydraulic oil source selecting valve can reliably and rapidly implement automatic switching of a large-flow oil source, and the reliability of an electro-hydraulic servo system is improved.

Description

Technical field [0001] The invention relates to the technical field of hydraulics, in particular to a mechanical hydraulic oil source selection valve. Background technique [0002] At present, in the hydraulic system, the switching of the main and standby oil sources requires the use of a pressure sensor or a differential pressure sensor to obtain the pressure difference of the main and standby oil sources, and then the control device issues the main and standby oil source switching instructions. When the flow is small, the switching can be realized by directly controlling the reversing of the solenoid valve, and when the flow is large, the switching is realized by controlling the hydraulic control reversing valve by the solenoid valve. The conventional oil source switching system has complex composition, low integration, poor reliability, inconvenience and high cost. [0003] In the field of launch vehicle hydraulic servo system, in order to improve the reliability of the system,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 朱康武傅俊勇翼娟王鸿飞房成纪宝亮
Owner SHANGHAI XINYUE METER FACTORY
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