Anisotropic rotor holographic dynamic balancing method based on equivalent initial phase vector

Abstract

The invention discloses an anisotropic rotor holographic dynamic balancing method based on equivalent initial phase vector. According to the method, the holographic spectrum principle is taken as the basis, vibration data in two directions are taken into account and are subjected to data fusion, so the anisotropic characteristic can be completely formulated, and the balance fault diagnosis is facilitated; furthermore, the rule of angular momentum conservation is utilized, a holographic spectrum ellipse is converted into an equivalent rotating frequency circle, the equivalent initial phase vector is taken as the characteristic for unbalanced vibration, and the requirement on fine balance is met. Through the equivalent initial phase vector, the defects of traditional initial phase vector on describing the amplitude of unbalance and phase position caused by anisotropy can be eliminated, the unbalance characteristic can be accurately characterized, and the spatial dynamic property of a rotor can be truly indicated. Therefore, the anisotropic rotor holographic dynamic balancing method based on the equivalent initial phase vector, provided by the invention, facilitates improving the accuracy and efficiency of on-site dynamic balance, so that the operating precision and service life of a rotary machine can be effectively improved and prolonged.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis and control of rotating machinery, and relates to an anisotropic rotor holographic dynamic balancing method based on an equivalent initial phase vector. Background technique [0002] Traditional dynamic balancing methods usually use a single vibration or displacement sensor to obtain the vibration information of the rotor, and perform balance identification based on the signal of the sensor. For an isotropic rotor-bearing system, its vibration signals are consistent along the circumferential direction, and a single sensor can well reflect the vibration state of the rotor. Therefore, the traditional single-sensor dynamic balancing method can often achieve satisfactory results. [0003] However, after a period of operation of the rotor-bearing system, the stiffness and damping of the bearings are generally anisotropic. In addition, the rotor itself may also have structural anisotropy due t...

AI Technical Summary

Problems solved by technology

However, only when the rotor is isotropic, the linear relationship between it and the unbalance is established. When the rotor is anisotropic, this relationship cannot be satisfied. Therefore, the traditional initial phasor for unbalanced The description of the response has certain flaws

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