Assembly Characteristics and Experimental Study of Rotor System with Elastic Ring Squeeze Film Damper

doi:10.3901/JME.2023.23.118

Abstract

Abstract: As the typical stability and vibration control structure in aero-engine, the assembly features (fit tightness) of elastic ring squeeze film damper have a certain effect on the stiffness and damping of the combined support system, and then affects the dynamic characteristics of the rotor system, but there are few relevant researches. In order to study the effect of fit tightness on the dynamic parameter characteristics of ERSFD, an ERSFD coupling model considering fit tightness was established. Using short bearing theory, the influence of fit tightness on elastic ring deformation, ERSFD oil film pressure, oil film thickness and bearing capacity was analyzed. Then, the finite element model of the combined supporting rotor is established considering the ERSFD fit tightness, and the influence of fit tightness on the dynamic characteristics of the rotor system was investigated. The results show that interference fit will increase the critical speed of ERSFD rotor system, but the damping effect of ERSFD is not obvious. The critical speed of ERSFD rotor system decreases with clearance fit, and the effect of vibration reduction is obvious. Finally, the ERSFD rotor test bench is built, and the correctness of the simulation results is verified by comparing the numerical simulation and experimental results.

Key words: ERSFD, fit tightness, oil film pressure, rotor system, dynamic characteristics

CLC Number:

V231.9
TB123

SUN Kai, LUO Zhong, LI Lei, GE Xiangdong, ZHENG Sijia. Assembly Characteristics and Experimental Study of Rotor System with Elastic Ring Squeeze Film Damper[J]. Journal of Mechanical Engineering, 2023, 59(23): 118-131.

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