A dynamic balance test method for large hydroelectric units based on centrifugal force equation

Abstract

The invention discloses a large hydropower unit dynamic balance test method based on a centrifugal force equation, and relates to the technical field of safe and stable operation and fault diagnosis of rotating machinery. Aiming at the vibration problem caused by rotor mass imbalance of the large hydropower unit, the conventional empirical trial weight formula is modified by the regression analysis method on the basis of a large number of field tests, and the accurate regression coefficients are obtained; meanwhile, the analysis method of finding the equilibrium point of centrifugal force to construct the equation is put forward, and the dynamic unbalance mass is obtained finally by solving the centrifugal force equation. Compared with the existing method, the centrifugal force equation method only needs two times of loading weight blocks so that the purpose of accurate counterweight can be achieved.

Description

technical field [0001] The invention belongs to the technical field of safe and stable operation and fault diagnosis of rotating machinery, and in particular relates to the treatment of vibration problems caused by mass imbalance of a rotor of a large hydroelectric unit, specifically a method for dynamic balance testing and analysis of a large hydroelectric unit based on a centrifugal force equation. Background technique [0002] The vibration of hydro-generator unit is a very harmful phenomenon in the operation of the unit, which seriously threatens the power supply quality of the unit, the service life of the unit and the safe and economical operation. Excessive vibration and swing of the hydro-generator set will easily damage the components of the unit, threaten the safe operation of the unit, and shorten the maintenance cycle and service life of the hydro-generator set. According to the technical standards of the country and the electric power industry, the vibration mon...

AI Technical Summary

Problems solved by technology

The traditional three-time adaptive weight method has simple equipment, and only needs to use a dial gauge to measure the vibration amplitude of the frame without measuring the vibration phase, and the method is easy to master. The weight is more troublesome, time-consuming and the accuracy of the counterweight is also low

The influence coefficient method requires the ins

Images