Generator rotor structure and generator

Abstract

The invention relates to a generator rotor structure which comprises a balance plate arranged between a generator exciter rotor and a non-shaft extension end bearing and fixed to a generator rotatingshaft. The balance plate is provided with a balance groove having an opening oriented to the non-shaft extension end bearing. The balance groove is provided with an inlet for holding balance blocks. According to the needs of dynamic balance, balance blocks are fixed to the matching positions in the balance groove. Since the balance plate is installed on the outer side of the non-shaft extension end bearing of the generator, the maintainability and operability of the generator are not influenced. By adjusting the sizes and weights of the balance blocks in the balance groove, the dynamic balanceof the generator rotor is detected and adjusted on site, the residual unbalance of the generator is reduced, the vibration noise of the generator is reduced, and the performance of vibration reduction and noise reduction of the unit is improved. The invention also relates to a generator including such a generator rotor structure.

Description

technical field [0001] The invention relates to the field of motors, in particular to a generator rotor structure and a generator. Background technique [0002] For large generators, the dynamic balance of the rotor is very critical. At present, it is generally adopted to install a balance block on the fan impeller at the shaft extension end of the generator, and the non-shaft extension end, that is, the exciter end, is on the main pole rotor coil frame close to the exciter rotor. The balance slot is opened, and the dynamic balance adjustment is realized by installing a balance block on the balance slot and welding the balance block firmly in the balance slot. Since the outer diameter of the main pole rotor coil frame is small, the opened balance slot is relatively small. And because it is close to the main pole coil, it is difficult to weld the balance weight. In particular, because the coil frame cannot be replaced in this structure, it is impossible to realize the balance...

AI Technical Summary

Problems solved by technology

[0002] For large generators, the dynamic balance of the rotor is very critical. At present, it is generally adopted to install a balance block on the fan impeller at the shaft extension end of the generator, and the non-shaft extension end, that is, the exciter end, is on the main pole rotor coil frame close to the exciter rotor. The balance slot is opened, and the dynamic balance adjustment is realized by installing a balance block on the balance slot and welding the balance block firmly in the balance slot. Since the outer diameter of the main pole rotor coil frame is small, the opened balance slot is relatively small. And because it is close to the main pole coil, it is difficult to weld the balance weight. In particular, this structure cannot realize the balance adjustment of the unit during on-site commissioning because the coil frame cannot be replaced.

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