Dynamic sealing device suitable for low-temperature and high-speed repeated use

A dynamic sealing, high-speed technology, applied to the components of pumping devices for elastic fluids, machines/engines, liquid fuel engines, etc. Seal wear, increase seal life, avoid dry friction effects

Pending Publication Date: 2019-05-21
BEIJING XINGJI RONGYAO SPACE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above two sealing methods cannot meet the requirements of long life and repeated use of turbo pumps under severe working conditions such as high speed, high pressure, and large radial runout.

Method used

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  • Dynamic sealing device suitable for low-temperature and high-speed repeated use
  • Dynamic sealing device suitable for low-temperature and high-speed repeated use
  • Dynamic sealing device suitable for low-temperature and high-speed repeated use

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Embodiment 1

[0035] See figure 1 , figure 1 It is a schematic structural diagram of a dynamic sealing device suitable for low-temperature high-speed repeated use provided by an embodiment of the present invention. This embodiment provides a dynamic sealing device suitable for low-temperature and high-speed reuse. The dynamic sealing device is mainly used between the liquid oxygen pump and the methane pump of the liquid rocket engine to isolate liquid oxygen and methane. The two media belong to the sealing device for the turbopump of the liquid rocket engine. Of course, the dynamic sealing device can also be applied to the turbopump of other liquid rocket engines. The present invention can also be used in the rotating devices in the fields of aviation and weapons. No specific requirements are made here, the turbopump of the liquid rocket engine mainly includes a shaft 18 and a bearing 9 sleeved on the shaft 18, the dynamic sealing device includes a main sealing structure, and the main seal...

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Abstract

The invention relates to a dynamic sealing device suitable for low-temperature and high-speed repeated use. The dynamic sealing device is applied to a liquid rocket engine turbopump. The liquid rocketengine turbopump comprises a shaft (18) and a bearing (9) sleeving the shaft (18). The dynamic sealing device comprises a main sealing structure. The main sealing structure comprises a dynamic ring (1), a static ring assembly (2), a corrugated pipe (3), a rear ring (4), a sealing shell (5) and a shaft sleeve (14). The dynamic sealing device comprises the main sealing structure, so that low-temperature media can easily enter a dynamic ring and static ring assembly joint surface, dry friction on the sealing surface is avoided, sealing wear is reduced, the sealing service life is prolonged, andrequirements for long service life and repeated use under severe working conditions such as high rotating speed, high pressure and large radial runout of the turbopump are met.

Description

technical field [0001] The invention relates to the technical field of sealing, in particular to a dynamic sealing device suitable for repeated use at low temperature and high speed. Background technique [0002] At present, the world has entered a trend of great development of commercial spaceflight. High-reliability, low-cost, reusable, and pollution-free rocket engines have become the development direction of liquid rocket engines. Liquid oxygen methane engine has good cooling performance, high combustion efficiency, is not easy to coke, and has higher specific impulse than liquid oxygen kerosene engine. The fuel cost per unit mass of methane is only 1 / 3 of kerosene and less than 1 / 30 of liquid hydrogen. [0003] As an important part of the liquid oxygen methane engine, the liquid oxygen pump is used to deliver the low-temperature liquid oxygen required for the engine to work. The liquid oxygen pump is next to the methane pump. Usually, a set of sealing device is set be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/12F04D29/06F04D29/58
Inventor 不公告发明人
Owner BEIJING XINGJI RONGYAO SPACE TECH CO LTD
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