Multi-air path-structure collector ring ventilating and cooling device of doubly-fed wind generator

Abstract

The invention discloses a multi-air path-structure collector ring ventilating and cooling device of a doubly-fed wind generator, relates to equipment for ventilating and cooling a doubly-fed wind generator collector ring and removing carbon powder. The multi-air path-structure collector ring ventilating and cooling device comprises a cylindrical hood, wherein at least one group of symmetrical air inlets are formed in the side wall of the upper end of the hood; an air inlet is formed in the bottom of the hood; a circular arc-shaped bent deflector plate is arranged inside each air inlet to divide each air inlet into two air paths; positions of deflector plates in the air inlets in the upper end of the hood are correspondingly regulated according to the number of carbon brushes and the arrangement way of the carbon brushes; the deflector plate in the air inlet in the bottom of the hood guides one air path into the end surface of a centrifugal fan, and vertically guides the other air path to the top end of the hood. The multi-air path-structure collector ring ventilating and cooling device reduces the fault probability effectively, improves the running reliability of the doubly-fed wind generator, and reduces the maintenance cost of the generator.

Description

technical field [0001] The invention relates to ventilation and cooling equipment for collector rings of double-fed wind power generators and carbon powder removal equipment, in particular to a collector ring ventilation and cooling device. Background technique [0002] The collector ring is an important part of the doubly-fed wind turbine. Its main function is to contact the excitation current with the collector ring through the carbon brush and conduct it to the rotor winding for excitation. Due to the high-speed rotation of the double-fed motor, the friction between the carbon brush and the collector ring will cause friction loss. The rotor current passes through the carbon brushes and slip rings, and also generates electrical losses. Therefore, in order to ensure the operation of the collector ring and carbon brush in the normal temperature range, the ventilation and cooling structure of the collector ring and carbon brush should be reasonably designed. The friction be...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method that solves the problems of uneven temperature of carbon brushes and slip rings, carbon powder deposition on carbon brushes, slip rings, and brush holders, especially carbon powder deposition on the bottom of the collector ring cover. The electric ring system realizes less maintenance or even maintenance-free, which improves the reliability of the doubly-fed wind turbine operation. The multi-air path structure collector ring ventilation and cooling device of the doubly-fed wind turbine

Images