Insulating transmission shaft for connecting with motor and gear case

Abstract

The invention provides an insulating transmission shaft for connecting with a motor and a gear case, wherein the shaft comprises: an A shaft of which a first end is connected with a motor main shaft; a B shaft of which a first end is connected with the gear case; a second end of the A shaft and a second end of the B shaft are connected; and an insulating layer covers the second end of the A shaft and / or the second end of the B shaft. The insulating layer between the second end of the A shaft and the second end of the B shaft solves an electro-corrosion problem on tooth surface and a bearing of the gear case caused by shaft current which is generated on the motor side in an integrated motor and gear case structure and passes through a transmission shaft, the damage from the shaft current to the integration is prevented, the service life of the integration can be greatly prolonged, and the reliability of the integration is improved.

Description

technical field [0001] The invention relates to an insulating transmission shaft connected with a motor and a gear box. Background technique [0002] In the connection design between the existing motor and the gearbox, in order to avoid the electric corrosion caused by the shaft current to the gear and spline surface in the gearbox, the main form of protection against the shaft current is: add a grounding carbon on the shaft at the end of the motor near the gearbox Brush, but the ground carbon brush is a consumable part and needs to be replaced regularly, and the worn carbon powder cannot be collected, which will cause pollution to the engine room and the unit. [0003] For the integrated motor and gearbox structure, the space at the end of the motor next to the gearbox is compact, and there is no space for installing grounding carbon brushes, and once the integrated motor and gearbox structure is assembled, it cannot be disassembled on the wind turbine. Parts here cannot b...

AI Technical Summary

Problems solved by technology

[0002] In the connection design between the existing motor and the gearbox, in order to avoid the electric corrosion caused by the shaft current to the gear and spline surface in the gearbox, the main form of protection against the shaft current is: add a grounding carbon on the shaft at the end of the motor near the gearbox brush, but the grounding carbon brush is a consumable part and needs to be replaced regularly, and the worn carbon powder cannot be collected, which will cause pollution to the engine room and unit

[0003] For the integrated motor and gearbox structure, the space at the end of the motor next to the gearbox is compact, and there is no space for installing grounding carbon brushes, and once the integrated motor and gearbox structure is assembled, it cannot be disassembled on the wind turbine. Parts here cannot be maintained

Therefore, the motor and gearbox of this structure cannot overcome the problem of electric corrosion of the gears in the gearbox and the surface of the gear shaft by the shaft current

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