CN114337114A - Oil-cooled flat wire motor with oil liquid driving spraying structure - Google Patents
Oil-cooled flat wire motor with oil liquid driving spraying structure Download PDFInfo
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- CN114337114A CN114337114A CN202111646796.4A CN202111646796A CN114337114A CN 114337114 A CN114337114 A CN 114337114A CN 202111646796 A CN202111646796 A CN 202111646796A CN 114337114 A CN114337114 A CN 114337114A
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- oil
- end cover
- rear end
- rotary
- flat wire
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- 238000005507 spraying Methods 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 title abstract description 5
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- REEBJQTUIJTGAL-UHFFFAOYSA-N 3-pyridin-1-ium-1-ylpropane-1-sulfonate Chemical group [O-]S(=O)(=O)CCC[N+]1=CC=CC=C1 REEBJQTUIJTGAL-UHFFFAOYSA-N 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 22
- 239000004020 conductor Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 208000019901 Anxiety disease Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The invention discloses an oil-cooled flat wire motor with an oil liquid driving spraying structure, which comprises a shell, a stator assembly arranged in the shell, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are arranged at two ends of the shell; the front end cover and the rear end cover are respectively provided with a front end oil cavity and a rear end oil cavity, and the top and the bottom of the front end cover and the rear end cover are respectively provided with an oil inlet nozzle and an oil outlet nozzle which are communicated with the front end oil cavity and the rear end oil cavity; and rotary injection mechanisms are respectively arranged on the outer walls of the bearing chambers of the front end cover and the rear end cover, and rotary injection oil cavities formed between the rotary injection mechanisms and the front end cover and between the rotary injection mechanisms and the rear end cover are communicated with the front end oil cavity and the rear end oil cavity. According to the motor, the rotary spraying mechanisms are arranged on the front end cover and the rear end cover of the motor, and the reaction force sprayed out of the oil spray nozzle by the cooling oil is utilized to drive the spraying assembly to rotate, so that the uniform spraying and cooling of the end winding of the flat wire motor are realized.
Description
Technical Field
The invention relates to the technical field of motors, in particular to an oil-cooled flat wire motor with an oil liquid driving spraying structure.
Background
In the new energy automobile industry development planning 2021-2035, the power density of a motor of a passenger vehicle reaches >4kW/kg by 2025, and the torque density of a motor of a commercial vehicle reaches the requirement of >19 N.m/kg. The development of the motor is in the direction of high power density and high torque density, the motor is tightly connected with a motor heat dissipation mode, and the continuous power, the continuous torque, the peak torque duration and the like of the motor can be improved through high-efficiency heat dissipation capacity.
At present, most oil-cooled motors represented by Model 3 have the winding end part cooled by two oil collecting rings which are respectively matched with the inner circle surface of a shell, the end surface of a stator core and the inner circle surface of a rear end cover in a sealing way, a plurality of oil spray holes are uniformly distributed on each oil collecting ring, and cooling oil is sprayed at the winding end part through the oil spray holes to permeate into the winding end part and take away a heat island of the end winding. However, most materials of the oil collecting ring are PPS + GF, the oil collecting ring is irregularly deformed when the oil collecting ring is heated in the installation process or in an oil bath environment, oil leaks from the contact surface of the oil collecting ring and the iron core or the contact surface of the end cover and the shell, and finally the pressure of an oil spray hole is insufficient, so that cooling oil cannot be sprayed to the end part of the winding.
Disclosure of Invention
The invention aims to provide an oil-cooled flat wire motor with an oil liquid driving spraying structure, which aims to overcome the defects of the prior art, and realizes the spraying and cooling of the end winding of the flat wire motor by arranging an oil cavity and a rotary spraying mechanism on the front end cover and the rear end cover of the motor and driving a spraying assembly to rotate by using the reaction force of cooling oil sprayed from an oil nozzle.
In order to achieve the purpose, the invention adopts the technical scheme that: an oil-cooled flat wire motor with an oil-driven spraying structure comprises a shell, a stator assembly arranged in the shell, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are arranged at two ends of the shell; the front end cover and the rear end cover are respectively provided with a front end oil cavity and a rear end oil cavity, the top and the bottom of the front end cover and the rear end cover are respectively provided with an oil inlet nozzle and an oil outlet nozzle, the front end oil inlet nozzle is communicated with the oil outlet nozzle through the front end oil cavity, and the rear end oil inlet nozzle is communicated with the oil outlet nozzle through the rear end oil cavity; the rotary injection mechanism is arranged on the outer wall of the bearing chamber of each of the front end cover and the rear end cover, a rotary injection oil cavity is formed between the rotary injection mechanism and the front end cover and between the rotary injection mechanism and the rear end cover, and the rotary injection oil cavity is communicated with the front end oil cavity and the rear end oil cavity.
Preferably, the rotary injection mechanism comprises a dynamic sealing device, an outer shell and a plurality of injection nozzles, the dynamic sealing device is installed in the outer shell, and the injection nozzles are uniformly distributed in the circumferential direction of the outer shell.
Preferably, the dynamic sealing device in the rotary injection mechanism is a combination of an ultrathin sealing deep groove ball bearing and a sealing ring.
Preferably, the material of the outer shell in the rotary spraying mechanism is PPS, carbon fiber or aluminum alloy.
Preferably, the number of the spray nozzles in the rotary spray mechanism is six or eight, and the spray nozzles are uniformly distributed on the outer shell in the circumferential direction.
Preferably, the spray nozzle in the rotary spray mechanism is irregular and is provided with a certain bending angle.
Preferably, the central axis of the spray nozzle in the rotary spray mechanism is aligned with the position of the U pin welding point of the end winding end surface of the motor.
Preferably, the injection section of the injection nozzle in the rotary injection mechanism is smaller than the flow passage of the oil inlet cavity.
Compared with the prior art, the invention has the following advantages:
1. cooling oil is sprayed to the end winding of the flat wire through the rotary spraying mechanism, and the cooling oil can be carburized into the end part of the winding due to the large gap between the conductors at the end part of the winding to take away heat on each conductor, so that the temperature of the winding is reduced by more than 70%; meanwhile, the cooling efficiency is improved by directly cooling the heat source, the stability of the product is improved, and the cost is reduced.
2. The cooling oil sprayed by the rotary spraying mechanism can be uniformly sprayed to each welding point and each conductor of the end winding; and meanwhile, the continuous impact of the fixed injection of the end winding is solved by the rotary injection.
3. The rotating speed of the rotary injection mechanism is controlled by adjusting the pressure and the flow of the external oil pump, so that the highest cooling efficiency of the motor under each working condition is realized, the energy consumption of the whole vehicle is reduced, and the problem of cruising anxiety of a client is solved.
Drawings
FIG. 1 is a schematic cross-sectional view of an oil-cooled flat wire motor according to the present invention;
FIG. 2 is an exploded perspective view of the oil-cooled flat wire motor of the present invention;
fig. 3 is an exploded perspective view of the rotary spray mechanism in the oil-cooled flat wire motor of the present invention.
In the figure: 1-an oil inlet nozzle; 2-a housing; 21-a circumferential flow channel; 3-front end cover; 31-front end oil chamber; 4-rear end cap; 41-rear end oil chamber; 5-a stator assembly; 6-a rotary spraying mechanism; 61-dynamic sealing means; 62-an outer shell; 63-a spray nozzle; 64-a rotary injection oil chamber; 7-oil outlet nozzle.
Detailed Description
The invention will be further described in detail with reference to examples of embodiments shown in the drawings to which, however, the invention is not restricted.
As shown in fig. 1 and 2, the oil-cooled flat wire motor with an oil-driven spraying structure provided by the invention comprises a casing 2, a stator assembly 5 installed in the casing 2, and a front end cover 3 and a rear end cover 4 installed at two ends of the casing 2, wherein two groups of circumferential flow channels 21 are arranged on the inner circular surface of the casing 2 and respectively flow to the front end cover 3 and the rear end cover 4, and an oil inlet nozzle 1 is installed at the center position of the outer surface of the casing 2 and is communicated with the circumferential flow channels 21; the front end cover 3 and the rear end cover 4 are respectively provided with a front end oil cavity 31 and a rear end oil cavity 41, the top and the bottom of the front end cover 3 and the bottom of the rear end cover 4 are respectively provided with an oil inlet nozzle 1 and an oil outlet nozzle 7, the front end oil inlet nozzle is communicated with the oil outlet nozzle through the front end oil cavity 31, and the rear end oil inlet nozzle is communicated with the oil outlet nozzle through the rear end oil cavity 41.
As shown in fig. 3, a rotary injection mechanism 6 is mounted on the outer wall of the bearing chamber of each of the front and rear end covers 3 and 4, a rotary injection oil chamber 64 is formed between the rotary injection mechanism 6 and the front and rear end covers 3 and 4, and the rotary injection oil chamber 64 is communicated with the oil chambers 31 and 41 of the front and rear end covers 3 and 4.
The rotary injection mechanism 6 comprises a dynamic sealing device 61, an outer shell 62 and a plurality of injection nozzles 63, wherein the dynamic sealing device 61 is installed in the outer shell 62, and the injection nozzles 63 are uniformly distributed in the circumferential direction of the outer shell 62.
The dynamic sealing device 61 in the rotary injection mechanism 6 is a combination of an ultrathin sealing deep groove ball bearing and a sealing ring; the ultrathin sealed deep groove ball bearing has the advantages of small resistance, reliable performance, long service life and good sealing performance.
The material of the outer shell 62 in the rotary spraying mechanism 6 is PPS, carbon fiber or aluminum alloy.
The number of the spray nozzles 63 in the rotary spray mechanism 6 is six or eight, and the spray nozzles are uniformly distributed on the outer shell 62 in the circumferential direction.
The spray nozzles 63 in the rotary spray mechanism 6 are irregular in shape and are provided with a certain bending angle, so that the efficient cooling of the end winding and the loss in the rotation of the end winding are realized.
The central axis of the injection nozzle 63 in the rotary injection mechanism 6 is aligned with the position of a U pin welding point on the end face of the end winding of the motor, and the injection section of the injection nozzle 63 is smaller than a flow channel of an oil inlet cavity.
As shown in fig. 1, when the motor works, cooling oil pumped from the outside is divided into three paths, and the three paths enter a machine shell 2, a front end cover 3 and a rear end cover 4 from three oil inlets 1 respectively; the cooling oil flowing to the shell 2 enters the circumferential flow channel 21 under the pushing action of pressure, the structural design of the circumferential flow channel 21 has the characteristics of large heat transfer contact area of the axial flow channel and small flow resistance of the spiral flow channel, and has strong heat dissipation capacity, and the cooling oil entering the circumferential flow channel 21 is in contact with the stator core, so that the heat on the stator core can be quickly reduced; the cooling oil flowing toward the front end cover 3 and the rear end cover 4 enters the front end oil chamber 31 and the rear end oil chamber 41, respectively, and then enters the rotary injection oil chamber 64 under the urging action of pressure.
The cooling oil enters the rotary injection oil cavity 64 through the front and rear end oil cavities 31 and 41 and is then sprayed out from the injection nozzle 63, the rotary injection mechanism 6 is driven to rotate due to the reaction force generated when the oil is sprayed out of the injection nozzle 63, the cooling oil can be uniformly sprayed to each welding point and each conductor of the front and rear end windings, the front and rear end windings of the motor are cooled, the problem of high local temperature is solved, the stability of the product is improved, and the service life of the product is prolonged.
After the three paths of cooling oil comprehensively cool the stator core, the front end winding and the rear end winding, the cooling oil after heat exchange is collected to the bottom of the end cover under the action of gravity, flows out of the motor from the oil outlet nozzle 7, is cooled by the heat exchanger outside the motor, and is pumped into the motor again through the external oil pump to form oil cooling circulation and reduce the temperature of the motor.
Claims (8)
1. The utility model provides a cold flat line motor of oil with fluid drive sprays structure, includes the casing, installs the stator assembly in the casing and installs front end housing and the rear end cap at the casing both ends, its characterized in that: two groups of circumferential flow channels are arranged on the inner circular surface of the shell and respectively flow to the front end cover and the rear end cover, and an oil inlet nozzle is arranged at the center of the outer surface of the shell and is communicated with the circumferential flow channels; the front end cover and the rear end cover are respectively provided with a front end oil cavity and a rear end oil cavity, the top and the bottom of the front end cover and the rear end cover are respectively provided with an oil inlet nozzle and an oil outlet nozzle, the front end oil inlet nozzle is communicated with the oil outlet nozzle through the front end oil cavity, and the rear end oil inlet nozzle is communicated with the oil outlet nozzle through the rear end oil cavity; the rotary injection mechanism is arranged on the outer wall of the bearing chamber of each of the front end cover and the rear end cover, a rotary injection oil cavity is formed between the rotary injection mechanism and the front end cover and between the rotary injection mechanism and the rear end cover, and the rotary injection oil cavity is communicated with the front end oil cavity and the rear end oil cavity.
2. The oil-cooled flat wire motor with an oil-driven spraying structure according to claim 1, characterized in that: the rotary injection mechanism comprises a dynamic sealing device, an outer shell and a plurality of injection nozzles, wherein the dynamic sealing device is arranged in the outer shell, and the injection nozzles are uniformly distributed in the circumferential direction of the outer shell.
3. The oil-cooled flat wire motor with an oil-driven spraying structure according to claim 2, characterized in that: the dynamic sealing device in the rotary injection mechanism is a combination of an ultrathin sealing deep groove ball bearing and a sealing ring.
4. The oil-cooled flat wire motor with an oil-driven spraying structure according to claim 2, characterized in that: the material of the outer shell in the rotary spraying mechanism is PPS, carbon fiber or aluminum alloy.
5. The oil-cooled flat wire motor with an oil-driven spraying structure according to claim 2, characterized in that: the number of the spray nozzles in the rotary spray mechanism is six or eight, and the spray nozzles are uniformly distributed on the outer shell in the circumferential direction.
6. The oil-cooled flat wire motor with an oil-driven spraying structure according to claim 2, characterized in that: the spray nozzle in the rotary spraying mechanism is irregular in shape and is provided with a certain bending angle.
7. The oil-cooled flat wire motor with an oil-driven spraying structure according to claim 2, characterized in that: and the central axis of the spray nozzle in the rotary spray mechanism is aligned with the U pin welding point on the end surface of the end winding of the motor.
8. The oil-cooled flat wire motor with an oil-driven spraying structure according to claim 2, characterized in that: and the injection section of an injection nozzle in the rotary injection mechanism is smaller than a flow passage of the oil inlet oil cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646796.4A CN114337114A (en) | 2021-12-30 | 2021-12-30 | Oil-cooled flat wire motor with oil liquid driving spraying structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646796.4A CN114337114A (en) | 2021-12-30 | 2021-12-30 | Oil-cooled flat wire motor with oil liquid driving spraying structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114337114A true CN114337114A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111646796.4A Pending CN114337114A (en) | 2021-12-30 | 2021-12-30 | Oil-cooled flat wire motor with oil liquid driving spraying structure |
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| Country | Link |
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| CN (1) | CN114337114A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115189520A (en) * | 2022-07-25 | 2022-10-14 | 重庆长安汽车股份有限公司 | Electricity drives cold motor of oil and car |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB170946A (en) * | 1920-07-31 | 1921-10-31 | Kantaro Nobuhara | Improvements in and relating to the cooling of dynamo-electric machines |
| CN113162299A (en) * | 2021-04-02 | 2021-07-23 | 华南理工大学 | Oil-cooled motor with liquid-driven rotary spraying structure |
| WO2021209285A1 (en) * | 2020-04-16 | 2021-10-21 | Renault S.A.S | System for oil cooling an electric motor |
| CN113675966A (en) * | 2021-09-14 | 2021-11-19 | 宁波吉利罗佑发动机零部件有限公司 | Stator assembly, motor and motor cooling system |
-
2021
- 2021-12-30 CN CN202111646796.4A patent/CN114337114A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB170946A (en) * | 1920-07-31 | 1921-10-31 | Kantaro Nobuhara | Improvements in and relating to the cooling of dynamo-electric machines |
| WO2021209285A1 (en) * | 2020-04-16 | 2021-10-21 | Renault S.A.S | System for oil cooling an electric motor |
| CN113162299A (en) * | 2021-04-02 | 2021-07-23 | 华南理工大学 | Oil-cooled motor with liquid-driven rotary spraying structure |
| CN113675966A (en) * | 2021-09-14 | 2021-11-19 | 宁波吉利罗佑发动机零部件有限公司 | Stator assembly, motor and motor cooling system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115189520A (en) * | 2022-07-25 | 2022-10-14 | 重庆长安汽车股份有限公司 | Electricity drives cold motor of oil and car |
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