Bearing structure for oil cooling of outer rotor permanent-magnet synchronous motor

A permanent magnet synchronous motor and outer rotor technology, applied in the field of bearings, can solve the problems of inability to achieve complete sealing, affect the efficiency of the motor, and poor waterproof and oil-proof performance, and achieve the effects of simplifying the structure, prolonging the service life, and uniform cooling

Active Publication Date: 2019-05-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waterproof and oil-proof performance of ordinary bearings is relatively poor, or this performance is not considered, and complete sealing cannot be achieved, and the coolant is likely to overflow, which affects the efficiency of the motor.

Method used

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  • Bearing structure for oil cooling of outer rotor permanent-magnet synchronous motor
  • Bearing structure for oil cooling of outer rotor permanent-magnet synchronous motor
  • Bearing structure for oil cooling of outer rotor permanent-magnet synchronous motor

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0030] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0031] Such as figure 1 , figure 2 , image 3 As shown, the present invention discloses a bearing structure for oil cooling of an outer rotor permanent magnet synchronous motor, including a bearing housing, a first main bearing, a second main bearing, a first auxiliary bearing and a second auxiliary bearing;

[0032] Both the first main bearing and the second main bearing include an inner ring, an outer ring, a cage and two snap rings, wherein the outer wall of the inner ring and t...

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Abstract

The invention discloses a bearing structure for oil cooling of an outer rotor permanent magnet synchronous motor. The bearing structure comprises a bearing seat, a first main bearing, a second main bearing, a first auxiliary bearing and a second auxiliary bearing. Each of the first main bearing and the second main bearing comprises an inner ring, an outer ring, a retainer, two clamp springs and asealing ring. The first main bearing and the second main bearing adopt ball bearings. The first main bearing and the second main bearing are respectively arranged at the two sides of the bearing pedestal. Two sides of the bearing seat are respectively bonded with the inner rings of the first main bearing and the second main bearing. The first auxiliary bearing and the second auxiliary bearing areneedle bearings and are respectively arranged at the two sides. A cavity for the flowing of cooling liquid is formed between the first main bearing and the second main bearing, and a through hole allowing the cooling liquid to flow in and out is formed in the bearing pedestal. According to the technical scheme, the cooling device of the motor is greatly simplified in structure, the cooling efficiency is improved, and the service life of the motor is prolonged.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a bearing structure for oil cooling of an outer rotor permanent magnet synchronous motor. Background technique [0002] Among today's hybrid vehicles, the development of extended-range electric vehicles is in full swing. The motor of the extended-range electric vehicle generally adopts the outer rotor permanent magnet synchronous motor, and its cooling method is water cooling, and the spiral water channel is processed in the stator. The disadvantage of water cooling is mainly that the cooling is uneven, and it only has a significant effect on the cooling of the front end of the stator. At the same time, water cooling is used in order to connect with the engine of the extended-range electric vehicle, the structure is relatively complicated, and the resistance of water circulation increases. For this reason, we consider that an oil cooling system can be shared with the engine. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/08H02K5/173H02K9/193H02K1/20F16C19/49F16C19/52F16C33/78F16C37/00
Inventor 林棻王少博赵又群李剑垒蔡亦璋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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