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An Overview of Bearing Candidates for the Next Generation of Reusable Liquid Rocket Turbopumps

《中国机械工程学报:英文版》2020年 第2期 | Jimin Xu Changhuan Li Xusheng Miao Cuiping Zhang Xiaoyang Yuan   Institute of Tribology School of Mechanical Engineering Hefei University of Technology Hefei 230009 China Aerospace Propulsion Institute China Aerospace Science and Technology Corporation Xi’an 710100 China Science Technology on Combustion Internal Flow and Thermal‑structure Laboratory Northwestern Polytechnical University Xi’an 710012 China Superconducting Materials Research Center Laboratory Northwest Institute for Non-ferrous Metal Research Xi’an 710016 China Key Laboratory of Education Ministry for Modern Design and Rotor‑Bearing System Xi’an Jiaotong University Xi’an 710049 China
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摘 要:There is a consensus in the aerospace field that the development of reusable liquid rockets can effectively reduce the launch expense.The pursuit of a long service life and reutilization highly depends on the bearing components.However,the rolling element bearings(REBs)used in the existing rocket turbopumps present obvious and increasing limitations due to their mechanical contacting mode.For REBs,high rotational speed and long service life are two performance indexes that mutually restrict each other.To go beyond the DN value(the product of the bearing bore and rotational speed)limit of REBs,the major space powers have conducted substantial explorations on the use of new types of bearings to replace the REB.This review discusses,first,the crucial role of bearings in rocket turbopumps and the related structural improvements of REBs.Then,with the prospect of application to the next generation of reusable liquid rocket turbopumps,the bearing candidates investigated by major space powers are summarized comprehensively.These promising alternatives to REBs include fluid-film,foil,and magnetic bearings,together with the novel superconducting compound bearings recently proposed by our team.Our more than ten years of relevant research on fluid-film and magnetic bearings are also introduced.This review is meaningful for the development of long-life and highly reliable bearings to be used in future reusable rocket turbopumps.
【分 类】【工业技术】 > 金属学与金属工艺 > 金属学与热处理
【关键词】 Aerospace Reusable liquid rocket turbopumps Rolling element bearings Bearing candidates REVIEW
【出 处】 《中国机械工程学报:英文版》2020年 第2期 43-55页 共13页
【收 录】 中文科技期刊数据库