Keyless phase virtual dynamic balance method for aero-engine

Abstract

The invention discloses a keyless phase virtual dynamic balance method for an aero-engine, and belongs to the technical field of vibration active control and artificial intelligence. For some rotatingmachines which cannot measure rotating speed signals and urgently needs dynamic balance, a finite element model similar to the rotating machinery can be established, and steady-state analysis is carried out on the rotating machinery after virtual unbalance is applied to the rotating machinery. According to the actually measured rotor vibration amplitude, a written finite element rotor dynamics program is utilized, and a nonlinear particle swarm optimization algorithm is adopted to optimize the position of the unbalance amount. Phase information is not needed, and the balance weight can be accurately obtained through one-time original vibration measurement at any rotating speed. Two possible positions of the counterweight can be calculated through one trial weight of any phase or weight.

Description

technical field [0001] The invention belongs to the technical field of vibration active control and artificial intelligence, and specifically relates to a keyless phase virtual dynamic balance method based on finite element dynamic response and particle swarm algorithm. The invention is aimed at dynamic balance of aeroengine rotors or fans, and other rotating machinery The field of rotor dynamic balancing. Background technique [0002] Under the action of high speed, high temperature and high load of aero-engine, the rotor system will undergo deformation, wear and concentricity changes, which will cause the rotor to vibrate due to the deviation of the center of mass from the center of rotation, which will lead to large vibration of the whole machine. Unbalance is the main cause of engine vibration, and the vibration fault caused by mass unbalance is one of the common and harmful faults. In the actual dynamic balancing operation on site, the influence coefficient method is m...

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Problems solved by technology

[0006] At present, in the algorithm for the virtual dynamic balance of the rotor, the patent with the publication number CN106644272A proposes a "virtual dynamic balance machine and dynamic balance design method for non-axisymmetric complex curved surface rotary parts", which is different from this patent. It mainly It is used to solve the dynamic balance design problem of non-axisymmetric complex curved surface rotating parts such as worm, and does not involve the trimming problem of unbalanced amount of rotating machinery

The patent with the publication number CN104535262A proposes "a virtual dynamic balancing method for a turbomachinery N+1 supporting shaft system without test weight". Meta-solid model, after unbalanced excitation is applied, the shafting steady-state synchronous response analysis is carried out, and the size and angle of the shafting counterweight of the unit are obtained by using the least square method to solve the equation. The difference from this patent is that it uses the influence coefficient method , needs the key phase signal to measure the phase, and cannot be used in the occasion of no key phase

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