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Oil cooling structure of traction motor

A traction motor and cooling structure technology, applied in the direction of motors, electric vehicles, electric components, etc., can solve the problems of affecting the service life of bearings, temperature sensitivity, and the failure of the motor to operate normally, and achieve the effect of improving efficiency and working performance.

Pending Publication Date: 2021-01-15
盖耀辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For most traction motors with a closed structure, if no effective heat dissipation measures are taken, the heat dissipation efficiency of the bearings is often not high
In addition, the bearing is more sensitive to temperature, and the high temperature rise of the bearing will affect the service life of the bearing and even cause the motor to fail to operate normally.

Method used

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  • Oil cooling structure of traction motor
  • Oil cooling structure of traction motor
  • Oil cooling structure of traction motor

Examples

Experimental program
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Effect test

Embodiment 1

[0030] combine Figure 1-Figure 6, an oil cooling structure of a traction motor provided in an embodiment of the present invention, the traction motor includes: a stator core 21, a coil winding 22, a stator end winding 23, a rotor core 24, a non-drive end bearing 25, a drive end bearing 9. Rotor hollow shaft 4, casing 5, drive end cover 6 and non-drive end cover 7, the casing 5, drive end cover 6 and non-drive end cover 7 constitute a closed structure, and casing 5 is provided with The first cooling pipeline 12, the oil cooling cooling structure includes: an oil inlet 1 opened on the upper end of the driving end cover, an oil outlet 2 opened on the lower end of the casing, and an oil outlet 2 opened on the lower end of the non-driving end cover The oil outlet 3, the second cooling pipeline 8 opened on the driving end cover 6, the third cooling pipeline 15 opened on the non-driving end cover 7, the axial center of the non-driving end cover 7 Temporary storage oil tank 17, a co...

Embodiment 2

[0035] As an optional embodiment of the present invention, in combination with figure 1 , figure 2 , figure 2 as well as Figure 4 , the oil outlet 10 of the second cooling pipeline 8 communicates with the inlet 11 of the first cooling pipeline 12, the oil outlet 13 of the first cooling pipeline 12 communicates with the inlet 14 of the third cooling pipeline 15, and the outlet of the third cooling pipeline 15 The oil port 16 communicates with a temporary storage oil tank 17 , and the temporary storage oil tank 17 communicates with a cooling pipeline 19 .

[0036] Such as image 3 As shown, the cooling oil enters the cooling passage 8 through the oil inlet 1 opened on the end cover 6 of the driving end, and circulates in the cooling passage 8 .

[0037] Such as Figure 4 as shown, Figure 4 It is a perspective view of the cooling pipeline in the casing of the oil-cooled traction motor in the embodiment. The cooling oil enters the cooling passage inlet 11 in the casing 5...

Embodiment 3

[0039] As an optional embodiment of the present invention, refer to figure 2 , the storage tank 17 is provided with a rotary seal 18 for preventing the cooling oil in the storage tank 17 from leaking.

[0040] Such as Figure 5 As shown, the cooling oil flows out through the oil outlet 13 of the casing and enters the pipeline inlet 14 of the non-driving end cover, then enters the non-driving end cover pipeline 15 to circulate, and finally flows out through the oil outlet 16 of the non-driving end cover pipeline And enter the temporary storage oil tank 17, then the cooling oil enters the inner pipeline 19 of the rotor hollow shaft 4 through the storage oil tank 17.

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Abstract

The invention relates to an oil cooling structure of the traction motor and the traction motor with the oil cooling structure provided by the embodiment of the invention, the cooling pipelines are spirally arranged in the axial directions of the driving end cover and the non-driving end cover respectively, and meanwhile, the cooling pipeline is arranged in the center of the axial direction of therotor hollow shaft; through holes are formed in the two ends of each cooling pipeline, the cooling pipelines are communicated in sequence, a temporary oil storage groove in the axial center of the non-driving end cover is communicated with the cooling pipelines of the non-driving end cover, and after cooling oil enters the cooling pipelines of the machine shell, the cooling oil circulates in the cooling pipelines respectively and flows out of the cooling pipelines under the action of centrifugal force of rotation of the rotor. Cooling oil is sprayed through the through holes to cool surrounding parts, and finally flows out of the oil outlet under the action of gravity to enter an external pipeline, so circulating cooling is realized. Therefore, each heat source structure in the traction motor can be fully cooled, the heat dissipation capability of each heat source structure is improved, and the highest hot spot temperature of the traction motor is reduced.

Description

technical field [0001] The invention belongs to the field of new energy electric vehicles, and in particular relates to an oil cooling structure for a traction motor. Background technique [0002] The design of traction motors for new energy electric vehicles has been pursuing smaller volume and higher power density. This will cause the overall heat dissipation of the traction motor to be difficult when it is running under rated conditions, and the temperature rise of the motor will increase. In addition, the working environment of the traction motor is harsh, and the external environment temperature changes greatly. Excessive temperature rise will not only reduce the performance of the motor but also affect the safety of the motor operation. [0003] At present, the commonly used cooling method for traction motors is casing cooling. Cooling pipes are designed in the motor stator casing, and the purpose of cooling the motor is achieved through the circulation of coolant in ...

Claims

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Application Information

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IPC IPC(8): H02K9/19H02K5/20H02K9/193
CPCH02K9/19H02K5/20H02K9/193Y02T10/64
Inventor 盖耀辉
Owner 盖耀辉
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