An end face sealing structure of a fuel pump shaft tail

A technology for end face seals and fuel pumps, which is applied to engine seals, pump components, and rotary piston/oscillating piston pump components, etc. It can solve problems such as cumbersome assembly, high weight of the gear pump housing, and large installation space , to achieve the effect of simplifying the seal structure of the shaft end face, shortening the axial installation space and reducing the weight of the product

Active Publication Date: 2018-12-14
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The shaft tail mechanical seal of the fuel gear pump used in the prior art has certain shortcomings: the axial length is long, and the installation space is required to be large, resulting in a high weight of the gear pump casing, which is very important for the design of aviation and aerospace pump products. Unfavorable; In addition, the traditional shaft tail seal structure is more complicated, and the assembly is more cumbersome

Method used

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  • An end face sealing structure of a fuel pump shaft tail
  • An end face sealing structure of a fuel pump shaft tail
  • An end face sealing structure of a fuel pump shaft tail

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Embodiment Construction

[0018] The invention relates to an end face sealing structure of a shaft tail of a fuel gear pump, and the fuel pump is used for an aero-engine;

[0019] Such as figure 1 As shown, the sealing structure described is a dynamic and static ring sealing structure including the static ring assembly 3 and the sealing end face 16 of the fuel pump driving gear 5; Assembled on the gear pump casing 4;

[0020] Such as figure 2 As shown, the static ring assembly includes a static ring 8, an end cover 6, a static ring seat 14, an anti-rotation block 11, a retaining ring 10, a wave spring 13, an adjusting washer 12, and O-rings 7 and 9; the end cover 6 and the static The ring seat 14 is fixedly connected and sealed with an O-ring 7. The static ring seat 14 is a ring and has a concave cross-section. The side wall inside the concave shape is welded with an anti-rotation block 11, and a wave spring is sequentially installed inside the concave shape. (13), adjusting gasket 12, O-shaped sea...

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Abstract

The invention relates to a sealing structure of a shaft end face of a fuel gear pump, belonging to the technical field of product structures. The purpose of the present invention is to simplify the seal structure of the shaft tail end face, shorten the axial installation space of the gear pump shaft tail sealing device, realize product weight reduction, reduce the difficulty of shaft tail assembly, and overcome the deficiencies of the prior art. In order to achieve the above object, the technical solution adopted by the present invention is: a kind of end face sealing structure of fuel gear pump shaft tail, and described fuel pump is used in aircraft engine; Described sealing structure is dynamic and static ring sealing structure including static ring assembly ( static ring) and the sealing end face (moving ring) of the driving gear of the fuel pump.

Description

technical field [0001] The invention relates to a sealing structure of a shaft end face of a fuel gear pump, belonging to the technical field of product structures. Background technique [0002] As we all know, the shaft end face seal of a fuel gear pump is generally composed of a moving ring, a static ring, a spring (loading device), an anti-rotation pin, an auxiliary sealing ring, a moving (static) ring seat, etc., and the static ring is generally installed on the end cover In general, the moving ring is generally installed in the moving ring seat on the transmission shaft, so the axial length of the shaft tail sealing device occupies a large amount of installation space at the shaft tail of the gear pump casing, resulting in high weight of the casing. In addition, the assembly of this kind of shaft tail sealing device is cumbersome. content of the invention [0003] purpose of the invention [0004] The shaft tail mechanical seal of the fuel gear pump used in the prio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/38F04C15/00
Inventor 江学兵丁燕徐轩史华琳王淑红
Owner XIAN AERO ENGINE CONTROLS
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