Rubbing experiment table for multi-disc bolt connection rotor and testing method thereof

Abstract

The invention discloses a multi-disc bolt connection rotor rub-impact experiment table and a test method thereof. By means of the rub-impact device, accurate adjustment of rub-impact parameters can be achieved; through the axial movement on the slide rail, the rub-impact test on each disc of the multi-disc-hub-bolt connection structure can be realized, and meanwhile, the rub-impact test on the high-pressure turbine disc can be realized; a spring limiting and locking nut and a rub-impact gap locking nut are additionally arranged, so that the looseness of the spring limiting nut and the rub-impact gap adjusting nut caused by vibration in the rub-impact process is avoided, and the stability of the rub-impact test is ensured; the rub-impact gap and the rub-impact rigidity can be adjusted by screwing and loosening the rub-impact gap adjusting nut and replacing outer springs with different wire diameters; the influence of the bolt pre-tightening force, the bolt tightening process, the rub-impact form, the rub-impact gap, the rub-impact rigidity, the rub-impact position and the combination of the parameters on the inherent characteristics and the dynamic characteristics of the whole rotor system can be widely considered.

Description

technical field [0001] The invention belongs to the technical field of vibration testing of aero-engine bolted rotor systems under rubbing fault conditions, and relates to a multi-disk bolted rotor rubbing test bench and a testing method thereof. Test bench and test method for the influence of friction form, rubbing stiffness, rubbing clearance, rubbing position and their combined parameters on the vibration characteristics of rotor systems. Background technique [0002] The bolt connection structure is a common structure for connecting various components in aero-engines, and the connection structure determines the dynamic characteristics of the aero-engine rotor system to a certain extent. In the traditional rotor dynamics research, the rotor system is usually regarded as a continuous whole, and the influence of the bolt connection structure on the vibration characteristics of the rotor system is ignored. In fact, there is a big difference between the inherent and dynamic ...

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Problems solved by technology

[0004] At present, researchers in the field of rotor dynamics and nonlinear vibration at home and abroad have revealed the influence of bolt pretightening force, bolt tightening process, rubbing form, rubbing position, rubbing stiffness, rubbing clearance and their combination parameters on rotor dynamics characteristics. In view of the nonlinear response characteristics of various faults, a large number of theoretical researches have been carried out on the performance, reliability and safety of aero-engines, while the rubbing faults induced by the connecting structure in the rotor system and the rubbing faults caused by the connecting structure The research on performance changes is still rare, so the theoretical and experimental research on the influence of aero-engine rubbing parameters and bolt connection parameters on the dynamic characteristics of the rotor system is of great significance

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