Power motor sealing structure for new energy automobile

Abstract

The invention provides a power motor sealing structure for a new energy automobile, and aims at enabling a connection position between a motor shaft and a motor end cap has high lubrication performance and ensuring the sealing performance in the connection position. The power motor sealing structure comprises the motor shaft and the motor end cap, the motor shaft penetrates a central hole in the motor end cap, the motor end cap is provided with inner oil sealing and outer oil sealing corresponding to the inner ring in the two sides of the central hole of the motor shaft, there is an interval distance between the inner oil sealing and outer oil sealing, the motor shaft penetrates the inner oil sealing and outer oil sealing, part, positioned between the inner oil sealing and outer oil sealing, of the motor shaft is sleeved by a pump blade rotor, the motor end cap is provided with a pump cavity corresponding to the peripheral area of the pump blade rotor, the pump cavity is enclosed by the inner oil sealing and outer oil sealing, the pump cavity is connected with the corresponding ends of an oil outlet pipe and an oil return pipe, and an external oil storage box is included.

Description

technical field [0001] The invention relates to the technical field of motor sealing, in particular to a power motor sealing structure for new energy vehicles. Background technique [0002] The power motors for new energy vehicles have higher and higher requirements for sealing. In addition to the high sealing requirements for the products when they leave the factory, it is also necessary to keep the motors in a sealed state for a long time to ensure the safety and reliability of the power motors; Use single oil seal or double oil seal for sealing, but in the actual operation process, because the motor speed is very high, and most of the motor oil seals can only be lubricated with grease, the frictional heat at the contact position between the oil seal and the motor shaft cannot be effectively taken away by the grease, resulting in extreme It is prone to bluish ablation on the surface of the shaft and ablation of the oil seal lip, resulting in failure of the oil seal and mot...

AI Technical Summary

Problems solved by technology

[0002] The power motors for new energy vehicles have higher and higher requirements for sealing. In addition to the high sealing requirements for the products when they leave the factory, it is also necessary to keep the motors in a sealed state for a long time to ensure the safety and reliability of the power motors; Use single oil seal or double oil seal for sealing, but in the actual operation process, because the motor speed is very high, and most of the motor oil seals can only be lubricated with grease, the frictional heat at the contact position between the oil seal and the motor shaft cannot be effectively taken away by the grease, resulting in extreme It is prone to bluish ablation on the surface of the shaft and ablation of the oil seal lip, resulting in failure of the oil seal and motor seal, which in turn leads to failure of the power motor; at the same time, due to the high heat generated by the friction between the shaft and the oil seal, the grease lubrication of the oil seal lip is also damaged. not long-term effective

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