A static eccentric oil film loading device and loading method for a squeeze oil film damper-rotor test system

Abstract

The invention relates to an oil film static eccentric loading device of a squeeze oil film damper-rotor test system, which comprises a squeeze oil film damper-rotor tester, a rope retainer, a fixed pulley, a loading tray, and a rope. The rope retainer is installed on the rotating shaft; the rope retainer includes two annular clamping blocks surrounding and fixed on the rotating shaft, a second bearing fixed between the two clamping blocks, and a rope fixed around the second bearing ring; one end of the rope is hung on the fixed ring and passes through the fixed pulley, the other end of the rope extends downwards and is hung with a loading tray, and weights are placed in the loading tray. By loading weights of different masses, the specified The squeeze oil film damper produces different static eccentricities. Compared with the traditional loading method, the present invention does not need to process multiple sets of damper shells, which reduces the total number of parts and test costs. The invention also discloses a loading method using the loading device.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to the field of experimental research on the dynamic characteristics of the aero-engine rotor-support system. Background technique [0002] As the "heart" of the aircraft, the safety and reliability of the aero-engine has been widely concerned. As the core component of an aero-engine, the rotor-support system’s vibration characteristics play a key role in the overall performance of the aero-engine, and statistical data also show that more than 90% of aero-engine structural strength failures are caused by or related to vibration. The supporting structure of aero-engines mostly adopts a combination scheme of rolling bearing + elastic support + squeeze film damper. [0003] Squeeze oil film damper has been widely used because of its simple structure, small space occupation and good vibration reduction effect. Static eccentricity occurs. The existence of static eccentricity will affect th...

AI Technical Summary

Problems solved by technology

[0005] At present, the main means of loading different oil film eccentricities on the tester is to pre-process oil film casings with different eccentricities. A large number of parts need to be processed to achieve different eccentricities. At the same time, the oil film casing needs to be replaced every time a group of tests are completed. The test process It also needs to be assembled and disassembled many times, and the efficiency is low

In addition, limited by the processing accuracy and the uncertainty of each assembly, the eccentricity loading accuracy is low, and the test repeatability is low

Images