Oil film static eccentric loading device and method of extrusion oil film damper-rotor test system

Abstract

The invention relates to an oil film static eccentric loading device of an extrusion oil film damper-rotor test system. The oil film static eccentric loading device comprises an extrusion oil film damper-rotor tester, a rope retainer, a fixed pulley, a loading tray and a rope. The rope retainer is mounted on a rotating shaft; the rope retainer comprises two annular clamping blocks which surround and are fixed on the rotating shaft, a second bearing which is fixed between the two clamping blocks, and a rope fixing ring which is arranged around the second bearing; one end of the rope is hung onthe fixing ring and penetrates through the fixed pulley, the other end of the rope extends downwards and is provided with the loading tray in a hanging mode, weights are placed in the loading tray, the designated squeeze oil film damper can generate different static eccentricity ratios by loading the weights of different masses, and compared with a traditional loading means, a plurality of groupsof damper shells do not need to be processed, so that the total number of parts is reduced, and the test cost is reduced. The invention further 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

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