Rotor non-trial-weight dynamic balancing method suitable for distributed unbalance

Abstract

The invention discloses a rotor non-trial-weight dynamic balancing method suitable for distributed unbalance. The method includes the steps that firstly, on the basis of an established rotor finite element dynamic model, correction of the dynamic model is achieved through experiments and simulation, and then finite element node stress is used for describing the distributed unbalance of a rotor; secondly, dimensions of a dynamic transfer matrix in a describing equation of the distributed unbalance are extended through increase of the test rotating speed, reversibility of the transfer matrix is achieved, and then solution of the distributed unbalance is achieved through matrix inverse operation; finally, precise dynamic balance of the rotor is achieved through a concentrated correction method of the distributed unbalance. According to the rotor non-trial-weight dynamic balancing method suitable for the distributed unbalance, the distributed unbalance can be recognized integrally, and the dynamic balance precision is improved; no test weight is needed in the dynamic balance process, dynamic balance can be completed with the only requirement that the speed is lower than a critical rotating speed, safety of dynamic balance operation is guaranteed, and the requirements of the high-speed rotor are met; the dynamic balance process is concise, and automatic control of computers is achieved conveniently.

Description

technical field [0001] The invention relates to a fault diagnosis and control method of a rotating machine, in particular to a rotorless dynamic balancing method suitable for distributed unbalanced quantities. The method can realize the complete identification of spatially continuous distributed unbalanced quantities without stopping the machine and adding test weights. . Background technique [0002] Rotating equipment plays an increasingly important role in machinery manufacturing, electric power, petrochemical, mining and many other industries. The vibration condition of rotating equipment is an important parameter to evaluate the health status of equipment operation, and the unbalanced rotor is the most important cause of excessive vibration of rotating machinery. When the rotor is rotating at high speed, even a slight unbalance will cause rotor deflection and internal stress, resulting in severe vibration of the rotor, directly affecting the processing quality, and eve...

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Problems solved by technology

And the dynamic balance method based on the lumped mass model assumption is not necessarily applicable to the processing of distributed unbalance

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