Slip ring brush holder of wind turbine

Abstract

The present invention discloses a slip ring brush holder of a wind turbine. The slip ring brush holder includes a slip ring, main brush grips, a brush holder apparatus, and copper binding posts mounted on the slip ring. The slip ring consists of insulating bodies and main slip rings that are alternately mounted on a slip ring shaft tube. The main brush grips are mounted on the brush holder apparatus by using support rods so as to be in contact with the main slip rings. The main brush grips are provided with constant pressure springs. The slip ring brush holder further includes an insulating end cover mounted on an upper end of the slip ring. The insulating body is formed by molding an SMC material. The insulating body of the present invention uses the SMC material, thereby having good insulating performance and good mechanical property. The diameter of the constant pressure spring is increased from an original diameter of 23.5 mm to a maximum diameter of 24.3 mm, so that pressure is more stable. An original single grounded protection apparatus is replaced by a double grounded slip ring protection manner, so that an expensive insulating bearing of a large wind power motor is protected in a more reliable manner. Due to the unique connection manner of nine copper posts of the slip ring of the slip ring brush holder, a contact area of the copper posts and the slip ring is greatly increased by 2.27 times compared with that of old products.

Description

technical field [0001] The invention belongs to the technical field of wind power generators, and in particular relates to a wind power generator slip ring brush holder. Background technique [0002] The slip ring brush holders currently used for wind power generators have the following disadvantages: the existing insulator material for 1.5MW slip rings is BMC material, its glass fiber is short, its mechanical properties are poor, and its strength cannot meet the needs of larger power slip rings Use; the pressure change of the carbon brush compression spring is unstable, and it may drop or rise suddenly during operation, which is not linearly proportional to the working length of the compression spring. In this way, the carbon brush cannot conduct electricity stably, and poor contact is extremely easy to burn the surface of the slip ring; The single grounding protection device is not reliable, and once it fails, it will cause damage to the insulating bearing; the three coppe...

AI Technical Summary

Problems solved by technology

[0002] The slip ring brush holders currently used for wind power generators have the following disadvantages: the existing insulator material for 1.5MW slip rings is BMC material, its glass fiber is short, its mechanical properties are poor, and its strength cannot meet the needs of larger power slip rings Use; the pressure change of the carbon brush compression spring is unstable, and it may drop or rise suddenly during operation, which is not linearly proportional to the working length of the compression spring. In this way, the carbon brush cannot conduct electricity stably, and poor contact is extremely easy to burn the surface of the slip ring; The single grounding protection device is not reliable, and once it fails, it will cause damage to the insulating bearing; the three copper pillars are not safe enough for high-power slip rings, and their conductivity is weak

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