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Design and experiment of the turbopump bearing used in reusable liquid rocket engines(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2024年01期
Page:
87-96
Research Field:
目次
Publishing date:

Info

Title:
Design and experiment of the turbopump bearing used in reusable liquid rocket engines
Author(s):
TAO Mengyao1;  DUAN Yifei2;  MAO Kai1;  WANG Xiaofeng1;  ZHENG Xiaopei1
1. Xi'an Aerospace Propulsion Institute, Xi'an 710100, China; 2. Luoyang Bearing Research Institute Co, Ltd, Luoyang 471039, China
Keywords:
reusability;  turbopump;  bearing;  repeated start-stop operation
PACS:
V434.21
DOI:
10.3969/j.issn.1672-9374.2024.01.008
Abstract:
The demand for the development of reusable liquid rocket engines has put forward higher requirements for the reliability design of turbopump structures. Aiming at the problem of failure of bearings in turbopumps under harsh working conditions such as low temperature, high speed, heavy load, and repeated start-stop, a certain type of reusable liquid oxygen kerosene rocket engine turbopump was taken as the research object, the design and dynamic simulation analysis of turbopump bearings were carried out from the aspects of structure, material, and retainer. Based on the working conditions of the turbopump, a low-temperature and room-temperature bearing operation test system was designed, and repeated start-stop operation tests were conducted. During the test, the bearing temperature and operating speed were monitored to determine the bearing status. After the test, the bearing steel balls and raceways were checked to be normal, and the bearing design parameters were retested and found to have no significant deviation. The experimental results show that the designed turbopump bearings can complete the predetermined repeated start-stop operation at the design speed, and at the same time, the same batch of bearings were successfully tested with engines, and ignition was repeated more than ten times.

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