WO2022037263A1 - Système de moteur électrique de refroidissement combiné huile-eau, et véhicule - Google Patents

Système de moteur électrique de refroidissement combiné huile-eau, et véhicule Download PDF

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Publication number
WO2022037263A1
WO2022037263A1 PCT/CN2021/103018 CN2021103018W WO2022037263A1 WO 2022037263 A1 WO2022037263 A1 WO 2022037263A1 CN 2021103018 W CN2021103018 W CN 2021103018W WO 2022037263 A1 WO2022037263 A1 WO 2022037263A1
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WO
WIPO (PCT)
Prior art keywords
oil
rotor
channel
casing
rotor shaft
Prior art date
Application number
PCT/CN2021/103018
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English (en)
Chinese (zh)
Inventor
高一
赵慧超
徐德才
李全
刘金锋
文彦东
张颖
苍衍
王宏宝
侯毅鹏
Original Assignee
中国第一汽车股份有限公司
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Filing date
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Application filed by 中国第一汽车股份有限公司 filed Critical 中国第一汽车股份有限公司
Publication of WO2022037263A1 publication Critical patent/WO2022037263A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium

Definitions

  • the present application relates to the technical field of drive assemblies, for example, to an oil-water hybrid cooling motor system and a vehicle.
  • the water-cooled motor in the related art cools the stator core by cooling the casing, but the end of the stator winding with serious heat dissipation cannot be directly cooled, and the heat of the winding can only be conducted to the casing through the air for cooling, and the cooling effect is poor.
  • Most of the oil-cooled motors in the related art only cool the ends of the stator windings, but cannot effectively cool the stator iron core and rotor magnets.
  • the traditional oil-cooled motors also need to add a cooler to cool the oil, which is costly. , takes up a lot of space.
  • the present application provides an oil-water hybrid cooling motor system and a vehicle, which can simultaneously cool the stator iron core, the stator winding and the rotor magnetic steel, with good cooling effect, low cost and small occupied space.
  • An embodiment provides an oil-water hybrid cooling motor system, including: a casing; a stator inserted inside the casing, the stator including a stator core and end windings; and a rotor inserted into the stator
  • the inner side of the rotor includes a rotor shaft, a rotor iron core embedded on the rotor shaft, and a plurality of magnetic steels embedded in the rotor iron core, and the plurality of magnetic steels along the rotor iron core radially and away from the center of the rotor core; a first oil passage, opened on the casing and extending between the inner wall of the casing and the outer wall of the stator core; an oil injection member, provided On the inner side of the casing and at the end of the stator iron core, the oil injection member is provided with an oil injection hole communicating with the first oil passage, and the oil injection hole is set for cooling oil At least spray to the end winding; a water channel is opened on the casing, and the water channel and at least a part of
  • the first oil passages are distributed along the circumference of the casing, and the area of the casing where the water passages are opened accounts for two-thirds of the outer peripheral area of the casing.
  • the first oil passage includes:
  • each radial oil inlet flow channel is communicated with the circumferential oil inlet flow channel, and each radial oil inlet flow channel includes a first radial oil inlet groove opened on the casing and a first radial oil inlet channel opened on the stator iron core A second radial oil inlet groove on the outer wall of the radiator and corresponding to the first radial oil inlet groove, and the water channel is perpendicular to the radial oil inlet flow channel.
  • the oil guide is a dynamic balance plate
  • the dynamic balance plate is embedded on the casing
  • the dynamic balance plate is located at the end of the rotor core;
  • the oil guide is a rotor pressure ring, the rotor pressure ring is embedded on the casing, and the rotor pressure ring presses the rotor iron core axially on the rotor shaft; or,
  • the oil guiding member is a shaft shoulder on the rotor shaft, and the shaft shoulder is axially compressed with the rotor iron core.
  • the fuel injection member is annular, and the two fuel injection members are respectively disposed at both ends of the stator iron core.
  • the oil-water hybrid cooling motor system further includes a bearing, the rotor shaft is coupled to the housing through the bearing, and a first port communicating with the oil inlet channel is further opened on the housing.
  • Two oil throwing flow channels, the second oil throwing flow channel is configured to spray the cooling oil at least to the bearing.
  • the oil-water hybrid cooling motor system further includes a bearing, the rotor shaft is coupled to the housing through the bearing, a flow guide is arranged on the rotor shaft, and a flow guide is arranged on the flow guide.
  • the flow guide is a rotor pressure ring embedded on the rotor shaft, and the rotor pressure ring is configured to axially press the rotor iron core on the rotor shaft.
  • the rotor shaft is a hollow shaft
  • the system further includes a conduit nested in the rotor shaft, the inner cavity of the conduit is the oil inlet channel, and the outer portion of the conduit is the oil inlet channel. diameter less than the inner diameter of said rotor shaft; or,
  • the rotor shaft is a hollow shaft, the inner cavity of the rotor shaft is the oil inlet channel, the inner wall of the rotor shaft is provided with a drainage groove, and the helical drainage groove is along the axial direction of the rotor shaft extend.
  • An embodiment provides a vehicle including the oil-water hybrid cooling motor system as described above.
  • FIG. 1 is a cross-sectional view of an oil-water hybrid cooling motor system provided by an embodiment of the application;
  • FIG. 2 is a schematic diagram of a first oil passage on a partial casing provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a water channel on a part of the casing provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a water channel and a first oil channel on a part of the casing provided by an embodiment of the present application;
  • FIG. 5 is a schematic structural diagram of a stator core provided by an embodiment of the application.
  • FIG. 6 is a schematic structural diagram of a fuel injection member provided by an embodiment of the application.
  • FIG. 7 is a side view of a rotor core provided by an embodiment of the application.
  • FIG. 8 is a side view of a dynamic balance plate provided by an embodiment of the present application.
  • FIG. 9 is a first structural schematic diagram of a rotor shaft according to another embodiment of an embodiment of the application.
  • FIG. 10 is a second structural schematic diagram of a rotor shaft according to another embodiment of an embodiment of the present application.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components.
  • this embodiment provides an oil-water hybrid cooling motor system, including a housing 1 , a stator 2 and a rotor 3 disposed in the housing 1 .
  • the stator 2 is fixedly inserted into the inner cavity of the housing 1
  • the rotor 3 is rotatably inserted into the inner ring of the stator 2 .
  • the stator 2 includes a stator core 21 and end windings 22 .
  • the stator core 21 is substantially annular, and the end windings 22 are wound around the inner peripheral surface of the stator core 21 .
  • the rotor 3 includes a rotor shaft 31 , a rotor iron core 32 and a plurality of magnetic steels 33 .
  • the rotor shaft 31 is rotatably supported on the housing 1 through the bearing 7 .
  • the rotor iron core 32 is fitted on the rotor shaft 31 and can rotate integrally with the rotor shaft 31 .
  • the outer peripheral surface of the rotor iron core 32 and the inner peripheral surface of the stator iron core 21 are provided opposite to each other with a predetermined gap therebetween.
  • the rotor core 32 is formed by stacking a plurality of rotor chips in the axial direction. Each rotor punch is in the shape of a disc. A magnet hole provided to embed the magnet steel 33 is formed inside the rotor core 32 . These magnet holes are distributed along the radial direction of the rotor iron core 32 and away from the center of the rotor iron core 32 , and each magnet hole is disposed through the rotor iron core 32 along the axial direction of the rotor iron core 32 .
  • the casing 1 is provided with a first oil passage 11 and a water passage 12 for cooling the stator core 21 and the end windings 22 .
  • the first oil passage 11 extends between the inner wall of the housing 1 and the outer wall of the stator core 21 .
  • the cooling oil is injected into the casing 1 and flows along the first oil passage 11 between the casing 1 and the stator core 21 to cool the stator core 21 with oil.
  • the fuel injector 4 , the housing 1 and the stator core 21 form an oil spray system for the end winding 22 .
  • the inner side of the casing 1 is also inserted with an oil injection member 4 , and the oil injection member 4 is located at the end of the stator iron core 21 .
  • the fuel injection member 4 is provided with an injection hole 41 which communicates with the first oil passage 11 .
  • the cooling oil flowing along the first oil passage 11 to between the inner wall of the casing 1 and the outer wall of the stator core 21 can be sprayed at least to the end winding 22 from the oil injection hole 41 of the oil injection member 4 under the action of oil pressure , to oil-cool the end windings 22 at the same time.
  • the water channels 12 on the casing 1 and at least part of the first oil channels 11 are stacked and arranged in a staggered manner.
  • Oil-water mixed cooling is adopted, and oil-cooling is carried out at the same time as water-cooling to effectively cool the stator core 21 and the end windings 22, so as to avoid the temperature of the cooling oil after cooling the stator core 21 rising and the cooling of the end windings 22 being insufficient.
  • improve the cooling capacity of the motor and at the same time, the cooling oil is cooled by the cooling water, no additional cooler is required, the cost is reduced, and the occupied space of the entire motor system is reduced.
  • the first oil passages 11 are distributed along the circumferential direction of the casing 1 to uniformly cool the stator core 21 .
  • the local thickness of the casing 1 is increased due to the lamination of the water channel 12 and the first oil channel 11 .
  • the area of the casing 1 where the water channel 12 is opened accounts for two-thirds of the outer peripheral area of the casing 1, taking into account the cooling effect and the thickness and weight of the casing 1 to ensure the stator core 21 and the end windings. At the same time, the cooling effect of 22 is avoided, and the shell 1 is too thick and heavy.
  • the size of the area where the first oil channel 11 and the water channel 12 are arranged and the overlapping area of the water channel 12 and the first oil channel 11 can be adjusted according to factors such as motor power.
  • the area where the water channel 12 is provided may include multiple areas, and the multiple areas are arranged at intervals along the circumferential direction of the casing 1 , so as to uniformly cool the cooling oil on the entire casing 1 .
  • the first oil passage 11 includes a circumferential oil inlet flow passage 111 and a plurality of radial oil inlet flow passages 112 .
  • the circumferential oil inlet flow channel 111 is disposed in the axial middle portion of the housing 1 .
  • a plurality of radial oil inlet flow passages 112 are arranged at intervals along the circumferential direction of the housing 1 , and each radial oil inlet flow passage 112 communicates with the circumferential oil inlet flow passage 111 .
  • the cooling oil enters the circumferential oil inlet channel 111 from the oil inlet 131 of the oil channel 13 on the casing 1, and flows along the circumferential oil inlet channel 111 to the entire circumference of the casing 1.
  • the cooling oil in the circumferential oil inlet channel 111 Oil is split to each radial oil inlet runner 112 .
  • Each radial oil inlet channel 112 includes a first radial oil inlet groove 1121 formed on the housing 1 and a second radial oil inlet groove 1121 formed on the outer wall of the stator core 21 and corresponding to the first radial oil inlet groove 1121 .
  • Oil inlet 211 see Figure 5).
  • the water channel 12 is perpendicular to the radial oil inlet flow channel 112 to improve the heat exchange efficiency between the cooling water and the cooling oil.
  • the water channel 12 includes a first flow channel 121 and a second flow channel 122 that communicate with each other.
  • the first flow channel 121 is located upstream of the second flow channel 122 , and the first flow channel 121 and the second flow channel 122 are communicated through an intermediate flow channel 123 .
  • the first flow channel 121 includes a first branch 1211 and a second branch 1212 that are communicated.
  • the first branch 1211 and the second branch 1212 extend along the circumferential direction of the casing 1, and the first branch 1211 and the second branch 1212 are arranged side by side along the axial direction of the casing 1.
  • the cooling in the first branch 1211 and the second branch 1212 The water flows in the opposite direction, and the first branch 1211 is located upstream of the second branch 1212 .
  • the second flow channel 122 includes a third branch 1221 and a fourth branch 1222 that communicate with each other.
  • the third branch 1221 and the fourth branch 1222 extend along the circumferential direction of the casing 1 and are arranged side by side along the axial direction of the casing 1 .
  • the cooling water in the third branch 1221 and the fourth branch 1222 flow in opposite directions, and the third branch 1221 and the fourth branch 1222 flow in opposite directions.
  • the branch 1221 is located upstream of the fourth branch 1222 .
  • the cooling water in the water storage device (not shown) is pumped from the water inlet 14 on the first branch 1211 into the first branch 1211, then flows into the second branch 1212 through the first branch 1211, and then flows into the second branch 1212 through the intermediate flow channel 123.
  • the third branch 1221 flows into the fourth branch 1222 from the third branch 1221 , and finally flows back to the water storage device through the drain port 15 on the fourth branch 1222 .
  • the cooling water in the water storage device flows into the water channel 12 again, and circulates in this way to continuously cool the cooling oil in the first oil channel 11 .
  • the shape of the first oil passage 11 and the water passage 12 and the overlapping area of the first oil passage 11 and the water passage 12 can be adjusted according to factors such as motor power and working state, so as to adjust the exchange of cooling water and cooling oil.
  • Thermal efficiency is not limited here.
  • at least one of the first oil passage 11 and the water passage 12 may be provided in a shape spirally extending in the circumferential direction of the casing 1 .
  • the water channel 12 in this embodiment is disposed on the side of the first oil channel 11 away from the rotor iron core 32 , the cooling water cools the cooling oil, and the cooling oil cools the rotor iron core 32 and the end windings 22 .
  • the water channel 12 may also be provided on the side of the first oil channel 11 close to the rotor core 32 , or the water channel 12 may be provided on the inner and outer sides of the first oil channel 11 respectively.
  • the casing 1 provided with the first oil channel 11 and the water channel 12 adopts a split structure in FIGS. 2-4 .
  • the entire housing 1 can be a one-piece structure.
  • the first oil passage 11 and the water passage 12 may be integrally cast with the casing 1 .
  • the above-mentioned fuel injection member 4 is annular, and the fuel injection member 4 is inserted into the inner side of the housing 1 .
  • the two fuel injection members 4 are respectively disposed at both ends of the stator core 21 , and the axial direction of the fuel injection members 4 is perpendicular to the axial direction of the stator core 21 and the casing 1 .
  • the oil injection member 4 is provided with an oil injection groove 42 , and the oil injection groove 42 communicates with the first oil passage 11 located between the inner wall of the housing 1 and the outer wall of the stator core 21 .
  • the end face of the fuel injection member 4 is in sealing contact with the end face of the stator iron core 21 .
  • the fuel injection member 4, the casing 1 and the stator iron core 21 form a sealed fuel injection cavity.
  • the fuel injection hole 41 on the fuel injection member 4 communicates with the fuel injection cavity. Spray to the end windings 22 .
  • the fuel injection groove 42 extends along the circumferential direction of the annular fuel injection member 4 , and the extension length of the fuel injection groove 42 is approximately two-thirds of the circumferential direction of the fuel injection member 4 .
  • the oil injection groove 42 can also be arranged to extend along the entire circumference of the annular oil injection member 4 , so that the oil injection groove 42 communicates with each of the radial oil inlet flow passages 112 .
  • a plurality of oil injection holes 41 are arranged at intervals along the circumferential direction of the oil injection member 4 to ensure that the cooling oil is uniformly sprayed to each part of the end winding 22 .
  • a plurality of fuel injection holes 41 are arranged at intervals along the extending direction of the fuel injection member 4 to form a row of fuel injection holes 41 .
  • Multiple rows of oil injection holes 41 can be provided along the axial direction of the fuel injection member 4 , and the multiple rows of oil injection holes 41 can also be arranged in dislocation along the extending direction of the fuel injection member 3 to improve the uniformity of cooling oil injection.
  • the shape of the fuel injection hole 41 may be set in a cylindrical shape, a conical shape, or the like, which is not limited herein.
  • the rotor 3 is provided with a second oil passage for cooling the magnetic steel 33 and the end windings 22 .
  • the second oil channel includes an oil inlet channel 311 , a magnetic steel cooling channel 321 , an oil guide channel 51 and a first oil throwing channel 52 .
  • the oil inlet channel 311 is formed on the rotor shaft 31 .
  • the rotor shaft 31 is a hollow shaft, and the inner cavity of the rotor shaft 31 is the oil inlet channel 311 .
  • the rotor shaft 31 is provided with an oil inlet hole 312 penetrating the thickness direction of the rotor shaft 31 .
  • the oil inlet hole 312 is a part of the oil inlet channel 311 .
  • the rotor shaft 31 is further provided with an oil guide member, and the oil guide member is located at the axial end of the rotor core 32 .
  • the oil guiding flow channel 51 and the first oil throwing flow channel 52 communicating with the oil guiding flow channel 51 are opened on the oil guiding member.
  • the oil guiding channel 51 on the oil guiding member communicates with the end of the oil inlet hole 312 away from the center of the rotor shaft 31 .
  • there are also two oil inlet holes 312 which are respectively communicated with the oil guide channels 51 on the two oil guide members.
  • the oil guide channel 51 is an oil guide groove formed on the oil guide member.
  • the first oil throwing channel 52 communicates with the oil guiding channel 51 and penetrates through the oil guiding member.
  • the magnetic steel cooling flow channel 321 is opened on the rotor iron core 32 and is located at the connection between the rotor iron core 32 and the magnetic steel 33 , that is, part of the surface of the magnetic steel 33 is exposed to the magnetic steel cooling flow channel 321 .
  • the magnetic steel cooling flow channel 321 axially extends through the rotor core 32 .
  • the oil guide channel 51 communicates the oil inlet channel 311 with the magnetic steel cooling channel 321 .
  • the cooling oil in the oil storage device is pumped to the oil inlet channel 311 , and enters the oil guide channel 51 of the oil guide member through the oil inlet hole 312 of the oil inlet channel 311 .
  • Part of the cooling oil in the oil guide channel 51 enters the magnetic steel cooling channel 321 to cool the magnetic steel 33 with oil.
  • Another part of the cooling oil in the oil guide channel 51 is thrown out obliquely in the radial direction of the rotor core 32 under the action of the rotational centrifugal force of the rotor 3 , and reaches the end winding 22 of the stator 2 to cool the end winding 22 with oil. .
  • the rotor iron core 32 is further provided with a magnetic steel reinforced cooling channel 322 to further oil-cool the magnetic steel 33 .
  • the magnetic steel reinforced cooling channel 322 axially penetrates the rotor core 32 and is disposed close to the magnetic steel 33 .
  • the cooling oil in the magnetic steel reinforced cooling channel 322 cools the magnetic steel 33 .
  • the oil guide flow channel 51 is disposed on the oil guide member in an annular shape, so that the oil guide flow channel 51 communicates with all the magnetic steel cooling flow channels 321 and the magnetic steel reinforcement cooling flow channels 322 .
  • a non-zero included angle is formed between the first oil slinger flow channel 52 and the axis of the rotor iron core 32 .
  • the first oil throwing channel 52 may also have other shapes, which are not limited herein.
  • the number of the first oil throwing channels 52 is also not limited.
  • the oil guide member is a dynamic balance plate 5 .
  • the dynamic balance plate 5 is provided with a mounting hole 53 , the dynamic balance plate 5 is embedded in the housing 1 through the mounting hole 53 , and is located at the end of the rotor core 32 , and is configured to adjust the dynamic balance of the rotor 3 .
  • the dynamic balance plate 5 is directly used as an oil guide, without adding a new structure, which reduces the quality and occupied space of the entire motor system.
  • two dynamic balance plates 5 are provided, and the two dynamic balance plates 5 are respectively provided at both ends of the rotor core 32 in the axial direction.
  • the oil guide channel 51 includes a plurality of radial grooves 511 and annular grooves 512 formed on the dynamic balance plate 5 .
  • One end of the radial groove 511 is communicated with the mounting hole 53 , and the cooling oil in the oil inlet hole 312 of the rotor shaft 31 flows into the annular groove 512 along the radial groove 511 .
  • a rotor pressure ring 6 is embedded on the rotor shaft 31 , and the rotor pressure ring 6 presses the rotor iron core 32 and the two dynamic balance plates 5 axially on the shoulder 313 of the rotor shaft 31 .
  • the dynamic balance plate 5 may not be provided, but the rotor pressing ring 6 may be fitted with the rotor iron core 32 , and in this case, the rotor pressing ring 6 may be used as an oil guide.
  • the dynamic balance plate 5 at the rear end of the rotor shaft 31 is cancelled, and the rotor pressing ring 6 presses the rotor iron core 32 and the dynamic balance plate 5 at the front end of the rotor shaft 31 axially on the rotor shaft 31.
  • At least one of the rotor pressure ring 6 and the dynamic balance plate 5 is used as an oil guide.
  • the rotor shaft 31 of this embodiment is provided with a shoulder 313 for positioning the dynamic balance plate 5 .
  • the dynamic balance plate 5 may not be provided, the shaft shoulder 313 and the rotor iron core 32 are pressed axially, and the shaft shoulder 313 is directly used as an oil guide.
  • the oil guide member may also be other structures disposed on the rotor shaft 31, which is not limited herein.
  • the rotor shaft 31 is also provided with a second oil throwing flow channel 315 that communicates with the oil inlet flow channel 311, and the cooling oil can be sprayed at least to the bearing 7 from the second oil throwing flow channel 315, so as to cool the oil and cool it down.
  • the second oil throwing channel 315 communicates with the inner cavity of the rotor shaft 31 and penetrates the wall thickness of the rotor shaft 31 .
  • the second oil throwing channel 315 is disposed at the rear end of the rotor shaft 31 close to the bearing 7 .
  • the second oil throwing channel 315 forms a non-zero included angle with the axis of the rotor shaft 31 to guide the cooling oil to be thrown to the bearing 7 as much as possible.
  • the number and shape of the second oil throwing channels 315 are not limited.
  • the rotor shaft 31 is provided with a flow guide member, and the flow guide member is provided with at least one flow guide structure of an oil guide slope 61 and an oil guide groove.
  • the cooling oil sprayed onto the end winding 22 by the oil injection hole 41 of the fuel injection member 4 and the cooling oil thrown onto the end winding 22 by the first oil throwing channel 52 on the dynamic balance plate 5 partially drop to the end winding 22 .
  • the flow guide member is the rotor pressure ring 6
  • the rotor pressure ring 6 is provided with an oil guide slope 61 .
  • oil guiding structures such as oil guiding grooves may also be provided on the rotor pressure ring 6 .
  • the deflector may also be a dynamic balance plate 5 or other structures, which are not limited herein.
  • the inner cavity of the rotor shaft 31 is set larger.
  • the oil intake at low speed will be insufficient, and the inner cavity of the rotor shaft 31 cannot be filled, resulting in the second oil throwing channel 315 .
  • the cooling oil thrown to the bearing 7 is insufficient, which affects the cooling and lubrication of the bearing 7.
  • a conduit 8 can be nested in the rotor shaft 31 , the inner cavity of the conduit 8 is the oil inlet channel 311 , and the outer diameter of the conduit 8 is smaller than the inner diameter of the rotor shaft 31 , so as to It is ensured that the cooling oil can effectively fill the inner cavity of the conduit 8 , thereby improving the cooling effect on the bearing 7 .
  • the conduit 8 is provided with a through hole, so that the inner cavity of the conduit 8 is communicated with the oil guiding channel 51 of the oil guiding member.
  • a drainage groove 314 may also be provided on the inner wall of the rotor shaft 31 , the drainage groove 314 is helical, and the helical drainage groove 314 extends along the axial direction of the rotor shaft 31 to cool the front end of the rotor shaft 31 .
  • the oil is guided to the rear end of the rotor shaft 31, and the filling capacity of the cooling oil is improved.
  • the drainage groove 314 may also have other shapes, which are not limited herein.
  • the casing 1 is provided with a first oil passage 11 and a water passage 12 for cooling the stator iron core 21 and the end windings 22 .
  • the cooling oil in the first oil passage 11 on the casing 1 and the stator core 21 cools the stator core 21 .
  • the fuel injection member 4 , the casing 1 and the stator core 21 form an oil spray system for the end winding 22 to cool the end winding 22 .
  • the water channel 12 on the housing 1 and at least part of the first oil channel 11 are stacked and alternately arranged, and oil-water mixed cooling is adopted, and oil cooling is performed at the same time as water cooling, so as to effectively cool the stator iron core 21 and the end windings 22 and avoid cooling the stator iron.
  • the rotor 3 is provided with a second oil passage, wherein the cooling oil in the oil inlet passage 311 of the rotor shaft 31 enters the magnetic steel on the rotor iron core 32 under the guidance of the oil guiding passage 51 of the oil guiding member In the cooling channel 321 , the magnetic steel 33 is cooled, and at the same time, part of the cooling oil is thrown to the end winding 22 through the first oil throwing channel 52 of the oil guide to further cool the end winding 22 .
  • the housing 1 is also provided with a second oil slinger runner 315 that communicates with the oil inlet runner 311 , and the cooling oil in the oil inlet runner 311 is sprayed to the bearing 7 through the second oil slinger runner 315 to cool and cool the oil.
  • the oil-water hybrid cooling motor system of this embodiment can simultaneously cool the stator iron core 21 , the end windings 22 , the magnetic steel 33 and the bearing 7 , and the stator iron core 21 and the end windings 22 are cooled by water cooling Cooling, the cooling effect is good, and at the same time, there is no need to set up an additional cooler, which reduces the cost and reduces the occupied space of the entire motor system.
  • This embodiment also provides a vehicle, including the above-mentioned oil-water hybrid cooling motor system, which has good cooling effect and high continuous power of the motor system.

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  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un système de moteur électrique de refroidissement combiné huile-eau et un véhicule. Le système de moteur électrique comprend un boîtier, un stator et un rotor. Un premier canal d'huile est disposé dans le boîtier et s'étend jusqu'à une position entre le boîtier et un noyau de stator ; un élément de pulvérisation d'huile est disposé sur un côté interne du boîtier et situé à une extrémité du noyau de stator, et l'élément de pulvérisation d'huile est pourvu d'un trou de pulvérisation d'huile qui est en communication avec le premier canal d'huile ; un canal d'eau est disposé dans le boîtier et est chevauché et décalé par rapport à au moins une partie du premier canal d'huile ; un élément de guidage d'huile est disposé sur un arbre de rotor et situé à une extrémité d'un noyau de fer de rotor ; et un deuxième canal d'huile comprend un canal d'écoulement d'entrée d'huile sur l'arbre de rotor, un canal d'écoulement de refroidissement d'aimant entre le noyau de fer de rotor et un aimant, et un canal d'écoulement de guide d'huile et un premier canal d'écoulement de jet d'huile qui sont disposés dans l'élément de guidage d'huile, le canal d'écoulement de guide d'huile étant conçu pour être en communication avec le canal d'écoulement d'entrée d'huile et le canal d'écoulement de refroidissement d'aimant, et le premier canal d'écoulement de jet d'huile étant conçu pour envoyer au moins de l'huile de refroidissement à un enroulement d'extrémité.
PCT/CN2021/103018 2020-08-18 2021-06-29 Système de moteur électrique de refroidissement combiné huile-eau, et véhicule WO2022037263A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010833898.6A CN111969791B (zh) 2020-08-18 2020-08-18 一种油水混合冷却电机系统及车辆
CN202010833898.6 2020-08-18

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