High-speed flexible rotor dynamic balance method

Abstract

The invention discloses a high-speed flexible rotor dynamic balance method. The method comprises the following steps of: firstly, establishing a finite element model of a rotor, obtaining 1-order to n-order mode values and an r-order critical rotating speed of the rotor from numerical simulation results, and taking the axial rotor position corresponding to the r-order maximum mode value as a reference position of the rotor; secondly, arranging two mutually vertical vibration transducers at the reference position, acquiring transient response of the rotor from the 0rpm uniform acceleration to the maximum rotating speed in the permitted range of the rotor to obtain mode damping of the rotor, stabilizing the rotor at the balanced rotating speed, acquiring stationary response of the rotor at the balanced rotating speed, and calculating sizes and azimuths of the rotor on n balanced planes which need adding correcting values; and finally, adding the correcting values on the rotor, acquiringthe transient response of the rotor during uniform acceleration, and checking whether the rotor reaches the required balance precision. The method has no risk of added trial mass, saves the balancingprocess of the added trial mass, simplifies the balancing step, and improves the balance efficiency and the balance precision.

Description

technical field [0001] The invention belongs to the dynamic balancing technology in the field of vibration and control of rotating machines, and specifically relates to a dynamic balancing method for a high-speed flexible rotor. Background technique [0002] At present, rotating machinery is widely used in various aspects of industry. Due to the unbalanced rotor, the rotating machinery produces severe vibrations, and damage to the machinery often occurs, causing many unnecessary losses in engineering. In order to reduce these unnecessary losses and reduce the vibration of the rotor, the rotor must be balanced. At present, the balance of the rigid rotor has been basically solved, but the high-speed dynamic balance of the flexible rotor is still a difficult problem. The unbalanced vibration response of a flexible rotor is not only related to the magnitude and phase of its unbalance, but also closely related to the characteristics of the rotor itself (elasticity, damping, sha...

AI Technical Summary

Problems solved by technology

[0005]In order to solve the defects and deficiencies of traditional dynamic balancing method that need to add test weight and drive multiple times, and may get incorrect correction amount, this invention proposes a high-speed flexible rotor The dynamic balancing method saves the balancing process of adding a test weight, avoids the divergence problem affecting the coefficient matrix during multi-plane balancing, reduces the number of times the rotor is started, and simplifies the dynamic balancing steps of the rotor

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