A flexible rotor holographic synchronous dynamic balancing method and system

Abstract

The invention discloses a holographic synchronous dynamic balance method and system for a flexible rotor. First, the rotor balance speed under rigid conditions is selected through the first-order critical speed of the rotor system; , and decompose the force and force couple components, and calculate the critical ratio of the force and force couple components before and after the first-order critical speed; carry out the unbalanced test weight of the force and the force couple at the equilibrium speed, and solve the pure force and the pure force couple according to the three-dimensional holographic difference spectrum technology. The unbalanced response is obtained, and the unbalanced response of the unit force and the force couple is obtained; the unbalanced test weight response of the pure force and the pure force couple at the working speed is simulated, and the unbalanced components of the force and force couple of each balance disc are calculated; the total balance of each balance disc is calculated. Unbalance amount to get the final balance weight. The synchronous dynamic balance of the flexible rotor at low and high speed is realized, and the safety of dynamic balance operation is improved; at the same time, the improvement of the initial phase vector is taken as the balance target.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of rotating machinery, and in particular relates to a flexible rotor holographic synchronous dynamic balance method and system. Background technique [0002] Large-scale rotating machinery, such as fans and gas turbines, are important equipment in many industries such as petroleum, energy, and metallurgy. Vibration is the most severe challenge faced by various types of large-scale rotating machinery, and its adverse effects on mechanical performance account for a high proportion. According to statistics, more than 70% of the vibration problems are caused by the imbalance of the rotor, which will cause internal stress and repeated bending of the rotor, and even cause the rotor to break. Therefore, rotor dynamic balancing technology is very important. [0003] The traditional holographic dynamic balancing technology fuses the information of the two sensors on a single vibration measuring s...

AI Technical Summary

Problems solved by technology

[0003] The traditional holographic dynamic balancing technology fuses the information of two sensors on a single vibration-measuring surface, which can fully reflect the vibration of the rotor on the vibration-measuring surface and improve the balance accuracy, but ignores the possibility of adding a test weight during the balancing process. It is impossible to reach the working speed through the critical speed for dynamic balancing; the flexible rotor low-speed holographic dynamic balancing method realizes the second-order modal balance at the low speed of the rotor working speed (higher than the first-order critical speed), although compared with the traditional The holographic dynamic balancing method broadens the range of technical applications, but the traditional initial phase vector as the balance target in the balancing process cannot accurately represent the unbalance of the flexible rotor, and there are certain limitations

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