Pilot type hydraulic safety valve

A safety valve and pilot-operated technology, which is applied in the hydraulic field, can solve problems such as damage to hydraulic components and measuring instruments, damage to hydraulic systems, and reduced accuracy of components and instruments, so as to achieve stable and rapid system pressure adjustment, reduce pressure shock time, and suppress The effect of amplitude

Active Publication Date: 2018-06-19
JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon will cause great damage to the hydraulic system. If it is serious, it will rupture the oil circuit, damage hydraulic components and measuring instruments, and if it is light, it will reduce the accuracy of components and instruments; hydraulic shock will adversely affect the reliability and stability of the system. ;When the hydraulic system is subjected to hydraulic shock, the hydraulic system will heat up, generate vibration and noise, and cause loosening of the joints and oil leakage, etc.

Method used

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Embodiment Construction

[0015] The present invention will be further elaborated below in conjunction with the accompanying drawings of the description.

[0016] A pilot-operated hydraulic safety valve, including a housing 1, a main valve core 2, a main spring 3, a pressure regulating knob 4, a pressure regulating spring 6, and a pilot valve core 7; Pipe B for oil return; housing 1 has an inner cavity for installing main spool 2 and pilot spool 7, oil inlet chamber A and oil return chamber B, main spool 2 and pilot spool are installed in housing 1 Among them, the main spool 2 forms cavity D between the left end surface and the housing, the K cavity is formed between the right end surface of the main spool 2 and the housing, and the G cavity is set between the main spool 2 and the oil inlet chamber A. An E cavity is formed between the spool 2 and the oil return cavity B, and a main spring 3 is provided between the right end surface of the main spool 2 and the casing; an L cavity is formed between the r...

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Abstract

The invention provides a pilot type hydraulic safety valve. The pilot type hydraulic safety valve comprises a shell (1), a main valve core (2), a main spring (3), a pressure adjusting knob (4), a pressure adjusting spring (6) and a pilot valve core (7); the shell is connected with an oil channel A and a pipeline B, wherein the oil channel A is connected with an oil source; the pipeline B is connected with returned oil; the shell (1) comprises an inner chamber, an oil feeding chamber A and an oil returning chamber B, wherein the inner chamber is used for installing the main valve core (2) and the pilot valve core (7); and the main valve core (2) and the pivot valve core are installed inside the shell (1). The invention provides a safety valve which can improve the dynamic properties, the response speed of the safety is increased, the amplitude valve and time of pressure impact of a system can be effectively restrained, and elements are protected from damages caused by the pressure impact.

Description

technical field [0001] The invention belongs to the hydraulic field and relates to a pilot hydraulic safety valve capable of improving dynamic performance. Background technique [0002] Pilot-operated hydraulic safety valves are widely used in aviation, aerospace and other fields as hydraulic system protection components. In the hydraulic system, when the pump suddenly starts, stops, changes speed or changes direction, or the valve port suddenly closes, or the action of the actuator suddenly stops, due to the action of the flowing liquid and the inertia of the moving parts, the system instantly forms a large high peak pressure. This phenomenon will cause great damage to the hydraulic system. If it is serious, it will rupture the oil circuit, damage hydraulic components and measuring instruments, and if it is light, it will reduce the accuracy of components and instruments; hydraulic shock will adversely affect the reliability and stability of the system. ; When the hydraul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B20/00
CPCF15B20/005
Inventor 王茂坤杨乐齐雯雯
Owner JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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