A semi-direct drive wind turbine integrated braking and grounding device

By integrating the motor brake disc with the grounding slip ring into one unit, and using welding and bolting of different materials, the problem of insufficient space in semi-direct drive wind turbines is solved, resulting in cost reduction, simplified assembly, and improved assembly accuracy and functional integration.

CN115276308BActive Publication Date: 2026-05-26CRRC XIAN YONGE JIELI WIND ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CRRC XIAN YONGE JIELI WIND ENERGY CO LTD
Filing Date
2022-08-04
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing semi-direct drive wind turbines cannot simultaneously install the motor brake disc and grounding slip ring due to insufficient space, resulting in high processing costs. Furthermore, the inability to install speed measuring devices and the complexity of single-blade hoisting affect assembly accuracy.

Method used

The motor brake disc and grounding slip ring are integrated into one unit. The outer circular friction ring and inner ring mounting plate of different materials are welded together and connected with bolts. The speed sensor is installed and gears are machined on the outer circumference to achieve multi-functional integration.

Benefits of technology

It reduced processing costs, lowered the cost of grounding slip rings, simplified the assembly process, improved assembly accuracy and consistency, and achieved space utilization and functional integration.

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Abstract

This invention discloses an integrated braking and grounding device for a semi-direct-drive wind turbine, comprising a motor brake disc and a grounding slip ring. The motor brake disc and the grounding slip ring are detachably connected as one unit in the axial direction via a stop and bolts to shorten the axial space. Simultaneously, the axial cross-section of the grounding slip ring is an "L-shaped" structure, consisting of an outer friction ring and an inner mounting plate made of different materials, to significantly reduce costs. Furthermore, this invention installs a speed sensor on the motor brake disc and machines its outer circumference into a gear shape to achieve single-blade turning function. This invention fully utilizes the space at the rear end of the motor by axially integrating the motor brake disc and the grounding slip ring, and significantly reduces manufacturing costs while maintaining performance by changing the material of the grounding slip ring.
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