A Rayleigh groove type floating ring sealing device for a hydrogen-oxygen engine turbo pump
A technology of sealing device and floating ring, applied in machine/engine, liquid fuel engine, components of pumping device for elastic fluid, etc., can solve the problem of large leakage of smooth hole floating ring seal, and achieve excellent starting Work performance, improve efficiency, small leakage of sealing medium
Active Publication Date: 2017-09-29
BEIJING AEROSPACE PROPULSION INST
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Problems solved by technology
[0006] In order to overcome the shortcomings of the existing smooth-bore floating ring seal leakage of the existing hydrogen-oxygen engine turbo pump, the invention proposes a Rayleigh groove-type floating ring sealing device for the hydrogen-oxygen engine turbo pump, which can meet the requirements of high-thrust hydrogen-oxygen engine turbo pumps. Performance and work safety and reliability requirements
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[0021] A Rayleigh groove type floating ring sealing device for a hydrogen-oxygen engine turbo pump according to the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0022] like figure 1 As shown, a Rayleigh groove type floating ring sealing device for a hydrogen-oxygen engine turbo pump according to the present invention includes a floating ring 1, and the floating ring 1 is arranged in the cavity formed by the sealing housing 2 and the cover plate 3, A wave spring 4 is arranged between the floating ring 1 and the cover plate 3 ; the sealing sleeve 5 passes through the central holes of the cover plate 3 , the floating ring 1 and the sealing housing 2 in sequence.
[0023] like figure 2 As shown, the floating ring 1 is composed of an integral graphite ring 8 and a floating ring seat 7 hot-pressed, wherein the graphite ring 8 is embedded in the floating ring seat 7, and the outer surface of the floating...
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The invention provides a Rayleigh groove type floating ring sealing device for a hydrogen-oxygen engine turbo pump, which includes a floating ring, the floating ring is arranged in the cavity formed by the sealing casing and the cover plate, and is arranged between the floating ring and the cover plate wave spring; the sealing sleeve passes through the cover plate, the floating ring and the center hole of the sealing housing in sequence; the floating ring is composed of a whole graphite ring and a floating ring seat hot-press assembled, wherein the graphite ring is embedded in the floating ring seat, Two anti-rotation bosses are symmetrically arranged on the outer surface of the floating ring seat; several Rayleigh grooves are arranged on the surface of the inner hole of the floating ring, and several circumferential grooves are added between the outlet section of the inner hole of the floating ring and the Rayleigh groove; Axial grooves are evenly arranged in the circumferential direction of the inner hole to communicate with the Rayleigh grooves and the circumferential grooves. The invention introduces the Rayleigh dynamic pressure groove structure into the floating ring seal, fully utilizes the dynamic pressure effect of the fluid in the sealing gap, and further improves the sealing performance.
Description
technical field [0001] The invention relates to a sealing device, in particular to a hydrogen-oxygen turbine pumping sealing device for a hydrogen-oxygen rocket engine. Background technique [0002] Since the beginning of the 21st century, major aerospace countries in the world have proposed plans for manned Mars and deep space exploration. High-thrust rockets are an indispensable means of transportation. Further reducing costs and pollution, and improving reliability and carrying capacity are the future development directions of launch vehicles. . The hydrogen-oxygen engine has the advantages of high theoretical specific impulse, no pollution, and good cooling performance, and is widely used in the new generation of launch vehicles at home and abroad. [0003] The hydrogen-oxygen turbo pump is one of the core components of the hydrogen-oxygen rocket engine, and the dynamic seal is a key component of the turbo pump. As the thrust of the engine increases, the rotational spe...
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IPC IPC(8): F04D29/08
Inventor 沈文金叶小强孙晓伟金志磊张玺林奇燕张召磊夏德新郑继坤贺雷
Owner BEIJING AEROSPACE PROPULSION INST