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Sealing switch of fuel system

A fuel system and switch technology, which is applied in the direction of sliding valves, engine components, mechanical equipment, etc., can solve the problems that the elastic sealing ring and the movable plate can not be guaranteed to fit completely, and achieve good economy, practicability and high reliability , the effect of simple structure

Active Publication Date: 2012-12-19
XIAN AIRCRAFT IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the switch has no pressure in the pipeline, the force on both sides of the movable plate is equal, and the elastic sealing ring cannot be guaranteed to fit completely with the movable plate, and the switch will leak oil.

Method used

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  • Sealing switch of fuel system
  • Sealing switch of fuel system
  • Sealing switch of fuel system

Examples

Experimental program
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Effect test

Embodiment Construction

[0022] This embodiment is a fuel system seal switch for a certain type of engine. like figure 1 As shown, this embodiment is located between the fuel pipelines, and the motor 1 drives the movable plate 11 in the switch box 2 to move up and down to realize the switch of the pipelines.

[0023] This embodiment includes a motor 1, a switch box 2, a linkage mechanism and a sealing assembly. It is obtained by improving the existing technology.

[0024] like figure 2 As shown, the switch box 2 is composed of a casting box body 7 and a box cover 6. The linkage mechanism and the sealing ring assembly are installed in the box body 7, and the linkage mechanism is located on the upper part of the switch box 2, and the sealing ring assembly is located on the switch box 2. the lower part. The upper part of the switch box has a through hole for the motor shaft, and the lower part of the switch box has a through oil delivery hole. The box body 7 and the box cover 6 are connected with s...

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PUM

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Abstract

The invention discloses a sealing switch of a fuel system, wherein an outer head face of a first fixing sealing ring is attached with an inner surface of a flange joint of an oil pipe at one side, and an outer head face of a second fixing sealing ring is attached with an inner surface of a flange joint of an oil pipe at the other side; a movable inserting plate in a link rod mechanism is arranged between the first fixing sealing ring and the second fixing sealing ring; one surface of the movable inserting plate is attached with an inner head face of the first fixing sealing ring, and the other surface keeps a clearance of 2-3mm with an inner head face of the second fixing sealing ring. Both a movable ring and a spring are sleeved on an outer circular surface of the second fixing sealing ring, and the movable ring is adjacent to the movable inserting plate. Under the function of the spring, the movable ring is capable of sliding on the sealing rings; meanwhile, the movable inserting plate is firmly attached with the first fixing sealing ring when the movable inserting plate is exerted with the pressure, to reduce the requirement on the processing precision. The sealing switch is simple in structure, high in sealing performance and excellent in technology, and is capable of effectively reducing the production time and the cost.

Description

technical field [0001] The invention relates to the sealing technology of an oil circuit switch in an aircraft fuel system, and is especially suitable for a low-pressure switch of the fuel system, such as a connection switch, a fire switch, a refueling control switch, and the like. Background technique [0002] The electric plug-in switch has the advantages of light weight, simple structure and reliable operation, and is the main form of the modern fuel system switch structure. For example, the RDK-26 electric plug-in switch used on a certain type of machine is an emergency oil discharge control switch. [0003] The RDK-26 electric plug-in switch is sealed by the tight fit of the elastic sealing ring and the movable plug-in board; at the same time, the switch also needs to complete the work of emergency oil discharge in the air, that is, open the switch under a certain pressure to make the fuel Flow out smoothly. When the RDK-26 electric plug-in switch is under pressure in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/20F16K3/30
Inventor 曲春远徐波
Owner XIAN AIRCRAFT IND GROUP
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