Liquid-magnetic composite bearing for reusable rocket turbine pump

Abstract

The invention provides a liquid-magnetic composite bearing structure for a reusable rocket turbine pump. An annular bearing bush body is arranged on an inner ring of a bearing pedestal and is axiallyconnected and fixed to a turbine pump shell. An even number of sector-shaped bush blocks are distributed at equal intervals in the circumferential direction and installed on the inner surface of the bearing bush body through elastic oblique fulcrums, oblique bushes are formed, and each oblique bush is internally and symmetrically provided with a pair of superconducting blocks in an embedded mannerin the circumferential direction. The position, corresponding to a liquid-magnetic composite bearing, on a turbine pump rotating shaft is sleeved with a permanent magnet ring. According to the liquid-magnetic composite bearing, dynamic pressure liquid film force and superconductive magnetic force are used for carrying out synergistic bearing on a turbine pump shafting, low-speed suspension and high-speed deloading are achieved through superconductive magnetic force, a high-speed main bearing force field is formed through the dynamic liquid film force, the problem that at the starting and stopping stages of an ordinary liquid film bearing, friction abrasion is serious is solved, and the liquid-magnetic composite bearing structure has value for developing a next generation of long-service life and high-reliability shafting supporting technology for the reusable rocket turbine pump.

Description

technical field [0001] The present invention relates to the technical field of shaft system support for liquid rocket turbopumps, in particular to a fluid dynamic pressure liquid film force-superconducting magnetic force composite bearing structure, which provides a turbopump service performance goal such as reusability, long life, and high speed. A new type of bearing technology. Background technique [0002] Liquid rockets are currently the most important means of delivery for human beings to carry out space and astronautics activities, and they are the key technical equipment that our country must rely on for the layout of satellite information networks and the construction of large-scale space stations. In recent years, the launch of the Long March 5 and technological breakthroughs such as the high-pressure supplementary combustion cycle hydrogen-oxygen engine have laid a solid material foundation for my country's aerospace industry. However, compared with the most adva...

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Problems solved by technology

[0004] The purpose of the present invention is to solve key application problems such as the above-mentioned rolling shaft performance limitations, and the alternatives of ordinary liquid film bearings that cannot solve the friction and wear in the start-stop stage of the turbo pump, and propose a liquid-magnetic composite bearing for reusable rocket turbo pumps. In order to achieve no mechanical contact friction between the bearing and the journal during the complete service period of the rocket turbopump, and provide superior high-speed dynamic performance than rolling bearings, significantly prolong the service life of the turbopump bearing and increase the speed of the turbopump

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