An oil-cooled motor for preventing electrical corrosion of bearings

An electrical corrosion and bearing technology, applied in electromechanical devices, electrical components, electric components, etc., can solve the problems of electrical corrosion of bearings, affect the reliability of the motor, the noise performance of the motor, and affect the service life of the motor, and achieve the prevention of electrical corrosion and a simple structure. , Improve the effect of motor life

Active Publication Date: 2022-01-14
ZHEJIANG LEAPMOTOR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the phenomenon of electric corrosion of bearings in high-speed rotating motors in the prior art, which affects the service life of the motor, the reliability of the motor and the noise performance of the motor, the present invention provides an oil-cooled motor that prevents electric corrosion of bearings. Both ends of the motor shaft are connected to the motor casing, and the motor casing is grounded. The potential of the two ends of the motor shaft is the same, so no shaft current passes through the two bearings, preventing electric corrosion of the bearings, effectively protecting the bearings, and improving Motor life, improve the reliability of the motor

Method used

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  • An oil-cooled motor for preventing electrical corrosion of bearings
  • An oil-cooled motor for preventing electrical corrosion of bearings
  • An oil-cooled motor for preventing electrical corrosion of bearings

Examples

Experimental program
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Embodiment 1

[0024] like figure 1 As shown, an oil-cooled motor for preventing electrical corrosion of bearings includes a motor housing 1, a motor shaft 2, a bearing 3, a conductive oil seal 4 and an oil pump assembly 5, the motor housing 1 is grounded through a conductor, and the motor The housing 1 includes a motor front housing 1.1, a motor rear housing 1.2 and a motor rear end cover 1.3, and the motor front housing 1.1, the motor rear housing 1.2 and the motor rear end cover 1.3 are electrically connected.

[0025] The motor shaft 2 is rotationally connected with the motor housing 1 through two bearings 3, the conductive oil seal 4 and the oil pump assembly 5 are respectively arranged at both ends of the motor shaft 2, the conductive oil seal 4 is arranged outside the bearing 3, and the conductive oil seal 4 is set On the motor shaft 2 , one end of the motor shaft 2 is electrically connected to the motor housing 1 through the conductive oil seal 4 , and the other end of the motor shaf...

Embodiment 2

[0030] like Figure 4 As shown, on the basis of Example 1, the wear resistance of the material of the motor shaft 2 is greater than that of the conductive member 4.2, and the end surface of the contact part 4.2. Installation groove 4.2.3, there is an oil scraper 7 inside the installation groove 4.2.3, one end of the oil scraper 7 is fixed to the bottom surface of the installation groove 4.2.3, the other end of the oil scraper 7 is in contact with the motor shaft 2, and the oil scraper The sheet 7 and the contact portion 4.2.2 are on the same circumferential contour of the motor shaft 2 . The oil scraper 7 is arranged obliquely relative to the axis of the motor shaft 2 . The structure can scrape oil at the contact position between the motor shaft 2 and the contact part 4.2.2 through the oil scraper 7, so as to prevent the leaked oil from affecting the conduction of the contact part 4.2.2. The oil scraper 7 is arranged obliquely relative to the axis of the motor shaft 2 to scrap...

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PUM

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Abstract

The invention discloses an oil-cooled motor for preventing electrical corrosion of bearings, which comprises a motor casing, a motor shaft, a bearing, a conductive oil seal and an oil pump assembly, the motor casing is grounded through a conductor, and the motor shaft is connected to the motor through two bearings. The casing is connected in rotation, the conductive oil seal and the oil pump assembly are respectively arranged at both ends of the motor shaft, the conductive oil seal is arranged on the outside of the bearing, the conductive oil seal is set on the motor shaft, and one end of the motor shaft is electrically connected to the motor casing through the conductive oil seal. The other end of the motor shaft is electrically connected to the motor housing through the oil pump assembly. The invention provides an oil-cooled motor for preventing electrical corrosion of bearings. Both ends of the motor shaft are connected to the motor casing, and the motor casing is grounded. The two ends of the motor shaft have the same potential, so there is no shaft current from The two bearings pass through to prevent electric corrosion of the bearings, effectively protect the bearings, improve the life of the motor, and improve the reliability of the motor.

Description

technical field [0001] The invention relates to the technical field of oil-cooled motors, in particular to an oil-cooled motor for preventing electrical corrosion of bearings. Background technique [0002] As the core technology of new energy vehicles, the motor assembly is increasingly integrated, lightweight, and low-cost. The motor is a rotating part, and the application of bearings is an indispensable core part of the motor. Due to the non-uniform reluctance of the motor in the prior art, a potential difference is generated at both ends of the motor shaft during high-speed rotation, which is easy to break down the bearing, so that the shaft current passes through the bearing and causes the problem of electric corrosion in the bearing. Electric corrosion of bearings occurs in high-speed rotating motors, which affects the service life of the motor, the reliability of the motor and the noise performance of the motor. How to prevent the shaft current from causing electric co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/40H02K5/16H02K5/10H02K5/124H02K5/20H02K9/19
CPCH02K11/40H02K5/161H02K5/10H02K5/124H02K5/203H02K9/19
Inventor 熊雨超宋建军姚伟科骆忠贤钟梁钢
Owner ZHEJIANG LEAPMOTOR TECH CO LTD
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