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Analysis and experimental research on sub-synchronous destabilization mechanism of rotor system in a sliding bearing(PDF)

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

Issue:
2017年04期
Page:
7-13
Research Field:
研究与设计
Publishing date:

Info

Title:
Analysis and experimental research on sub-synchronous destabilization mechanism of rotor system in a sliding bearing
Author(s):
HUANG Jinping1; 2;  DU Dahua1;  WANG Wei1
1. Xi’an Aerospace Propulsion Institute, Xi’an 710100, China 2. National Key Laboratory of Science and Technology on Liquid Rocket Engines, Xi’an 710100, China
Keywords:
sliding bearing;  rotor system;  sub-synchronous stability;  destabilization mechanism analysis
PACS:
V434-34
DOI:
-
Abstract:
The sub-synchronous destabilization mechanisms of rotor system in a sliding bearing have been investigated according to a simplified model of bearing rotor system. A destabilization solution method is also proposed. A running test of a flexible sliding bearing rotor system with 5 tilting-pads was conducted on the rotor experiment platform. During the test, an obvious sub-synchronous destabilization was occurred when the operating speed rose from the 2nd to the 3rd critical speed. The threshold speed of destabilization was obtained. By analyzing the experimental results, the average circumferential velocity of the circular fluid in the bearing was derived. By modifying the rotor configuration, the lower critical speed of lateral bending has been raised, and the destabilization has been eliminated. The steady ultrahigh-speed operating of the new test rotor was carried out.

References:

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