Rotor field dynamic balance multi-objective optimization method and system

Abstract

The invention discloses a rotor field dynamic balance multi-objective optimization method and system, and the method comprises the steps: obtaining an original vibration signal, a key phase signal, a vibration signal after trial weight addition and a key phase signal of a rotor, and carrying out the calculation through a cross-correlation algorithm, and obtaining the amplitude and phase of an original unbalance signal and an unbalance signal after trial weight addition of the rotor; constructing an optimization function which takes the minimum sum of squares of the residual vibration displacement amplitudes of all the measuring points at all the balance rotating speeds and the minimum maximum residual vibration displacement amplitude as optimization targets; performing rotor dynamic balance optimization calculation on the target function through a multi-target particle swarm algorithm based on speed limitation; and taking the maximum balance efficiency sum of each measuring point at each balance rotating speed as a decision-making target to obtain an optimal counterweight scheme. According to the method, the optimal dynamic balance weight scheme can be obtained, long-term stable operation of the rotor is ensured, and the method can be used for field dynamic balance of rigid rotors and flexible rotors of various rotating machines.

Description

Technical field [0001] The present invention relates to the field of rotating mechanical rotor balancing, and more particularly to a multi-objective optimization method and system for rotor field dynamic balance. Background technique [0002] Rotating machinery such as centrifugal compressors, steam turbines generators, wind turbines, gas turbines, etc., are key equipment in industrial sectors such as oil, chemical, metallurgy, power, supporting the development of industrial technology. The rotor is the most important and core component of the rotating machine. With the development of the industry, the rotor is required to be more speedy, precision, and the speed of the rotor also requires increasingly high, some rotors have even reached more than 10,000 to every minute. When the working speed of the rotor is greater than the first-order critical speed, the rotor self-deflection deformation is not negligible during operation, and the flexural deformation produces quality eccentri...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the ill-conditioned coefficient matrix and the difficulty in guaranteeing the uniformity of residual vibration in the existing rotor dynamic balance method, the present invention proposes a multi-objective optimization method for the rotor dynamic balance in order to achieve the optimal counterweight of the rotor during the dynamic balance of the rotor Fast and accurate calculation to improve dynamic balance efficiency

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