Method for determining unbalance amounts of rotor

Abstract

The invention provides a method for determining unbalance amounts of a rotor. The unbalance amounts of the rotor and the unbalance amount of a balancing machine are divided. The method includes the following steps: selecting two planes on the rotor; measuring the first named unbalance amount, on the planes, of the rotor through the balancing machine, wherein the first named unbalance amount is a vector sum of the unbalance amount of the balancing machine and the unbalance amount of the planes of the rotor; rotating the rotor relative to the balancing machine by a certain angle; moving an angle zero-degree reference point on the rotor by the same angle in the opposite rotation direction of the rotor; measuring the second named unbalance amount of the rotor through the balancing machine, wherein the second named unbalance amount is a vector sum of the unbalance amount of the balancing machine and the unbalance amount of the planes of the rotor after the rotor is rotated by the certain angle, in the first named unbalance amount and the second named unbalance amount, the unbalance amounts of the balancing machine are the same in size and direction, the unbalance amounts of the planes of the motor are the same, and the directions of the rotor are changed by the certain angle.

Description

technical field [0001] The invention relates to a method for determining the unbalance of a rotor. Background technique [0002] In the prior art, the existing international standard (ISO2953:1999 Balancing Machines–Description and evaluation) and the corresponding Chinese national standard (GB / T4201-2006 The description inspection and evaluation of the balancing machine), or the inspection and evaluation of the balancing machine by the existing balancing machine manufacturer, is a method inherited from history. The two indicators used are the minimum achievable residual unbalance Umar and the reduction of unbalance Rate Urr. The physical meaning of these two indicators is not clear. These two indicators are used to test and evaluate the balancing machine. The unbalanced amount obtained by the balancing machine from measuring the rotor is the vector sum of the unbalanced amount of the balancing machine itself and the unbalanced amount of the rotor. The zero reference of t...

AI Technical Summary

Problems solved by technology

[0003] When the user uses the balancing machine, when the user has doubts about whether the measurement result of a certain balancing machine is accurate, especially when the measurement results of two balancing machines for the same rotor are inconsistent, there is no way to prove and judge the balance machine. measurements are accurate

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