Electric corrosion prevention rotor and production method thereof

Abstract

The invention discloses an electric corrosion prevention rotor and a production method thereof, and relates to a direct current high-voltage plastic package motor rotor and a production method thereof. At present, the electric corrosion phenomenon is normal for a direct current plastic package motor; an oil membrane is broken down by current between a bearing ball and an inner ring as well as an outer ring to discharge to produce high temperature, so that local surface of a bearing is melted to form spots and pits, and further, the hardness of the material of the inner ring and the outer ring of the bearing is reduced. The rotor comprises a rotating shaft, an iron core and a magnet, wherein the iron core is sleeved on the rotating shaft; the magnet is arranged outside the iron core; the rotor is characterized in that: the iron core comprises an inner yoke iron core and an outer yoke iron core which is arranged at the periphery of the inner yoke iron core and is concentric with the inner yoke iron core; and an insulating framework is arranged between the inner yoke iron core and the outer yoke iron core. According to the technical scheme, a current loop is cut off through the insulating framework which is arranged between the rotor inner yoke iron core and the rotor outer yoke iron core, so that the axial current flows to the bearing through the rotating shaft, and further, the electric corrosion of the bearing is effectively prevented, and the service life of the bearing of the direct current high-voltage plastic package motor is prolonged.

Description

technical field [0001] The invention relates to a DC high-voltage plastic-sealed motor rotor and a production method thereof. Background technique [0002] Galvanic corrosion is common in DC plastic-sealed motors, which is caused by current discharge. The existing DC plastic-sealed motors have insulating materials between the end cover and the stator core, and the end cover and the iron core are completely insulated. When the stator coil passes through When the voltage is modulated at high frequency, due to the coupling effect, a voltage difference is formed between the stator core and the metal end cover, and the current forms a loop through the metal part of the rotor, the inner and outer rings of the bearing, and the end cover matching the bearing. The current breaks down the oil film discharge between the bearing balls and the inner and outer rings, resulting in high temperature, which causes the local surface of the bearing to melt, forming spots and pits, resulting in ...

AI Technical Summary

Problems solved by technology

The current breaks down the oil film discharge between the bearing balls and the inner and outer rings, resulting in high temperature, causing the local surface of the bearing to melt, forming spots and pits, resulting in a decrease in the hardness of the material of the inner and outer rings of the bearing, accelerating the wear speed, generating noise, and shortening the service life of the bearing.

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