Transient high-speed dynamic balancing method without trial weight based on acceleration response information of flexible rotor

Abstract

The invention provides a transient high-speed dynamic balancing method without test weight based on the acceleration response information of a flexible rotor. Firstly, the transient motion equation of the rotor system is established by using the transfer matrix method, and the transient motion response data is obtained by calculating the Newmark integral method; then, the unbalanced excitation force is calculated by using the combination method of load identification and modal coordinate conversion; then , based on the auxiliary angle formula combined with the characteristics of the unbalanced excitation force, the rotor unbalance is calculated. The present invention combines the characteristics of the actual operation of the engine rotor, does not need to add a test weight, only needs to obtain the transient response data of the rotor system during the acceleration start process, and can complete the balance of the rotor through mathematical methods, with high calculation efficiency and high balance accuracy. An accurate and efficient transient dynamic balance method without test weight can be extended and applied to engineering practice.

Description

technical field [0001] The invention belongs to the technical field of rotor balancing, and in particular relates to a transient high-speed dynamic balancing method without test weight based on the acceleration response information of a flexible rotor. Background technique [0002] Identifying the unbalanced distribution of the rotor and strictly balancing the rotor is an important measure to reduce engine vibration and improve the safety, reliability and life of the engine. It runs through all aspects of aero-engine manufacturing, installation, use and maintenance, and occupies a very important position in the development of aero-engines. [0003] The balance of the rotor can be divided into steady state balance and transient balance according to whether the speed changes during balance. The steady-state balancing method balances the rotor by holding it steady at one or more rotational speeds. The transient balance method is a method to balance the rotor in the process of...

AI Technical Summary

Problems solved by technology

At the same time, the steady-state balance method includes measuring the initial vibration of the rotor, adding a balance test weight, measuring the vibration of the rotor after adding the test weight, etc., to determine the unbalance amount after multiple test runs. The balance period is long, the balance efficiency is low, and the balance accuracy is poor.

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