CN117833507A - Stator circumference staggered oil way cooling motor - Google Patents
Stator circumference staggered oil way cooling motor Download PDFInfo
- Publication number
- CN117833507A CN117833507A CN202211193232.4A CN202211193232A CN117833507A CN 117833507 A CN117833507 A CN 117833507A CN 202211193232 A CN202211193232 A CN 202211193232A CN 117833507 A CN117833507 A CN 117833507A
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- oil
- cavity
- staggered
- stator
- cooling
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- 238000001816 cooling Methods 0.000 title claims abstract description 102
- 238000003475 lamination Methods 0.000 claims abstract description 63
- 238000002347 injection Methods 0.000 claims description 52
- 239000007924 injection Substances 0.000 claims description 52
- 238000003860 storage Methods 0.000 claims description 38
- 238000004804 winding Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 19
- 210000003734 kidney Anatomy 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 238000004080 punching Methods 0.000 abstract description 15
- 238000005507 spraying Methods 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- 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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a stator circumferential staggered oil way cooling motor, which comprises a shell component, an end cover component, a stator component and a rotor component, wherein the shell component is arranged on the shell; the shell component and the end cover component are mutually matched to form a cavity, and the stator component and the rotor component are arranged in the cavity and divide the cavity into a first cavity and a second cavity; the stator assembly comprises a plurality of lamination sections, wherein cooling channels are distributed in the circumferential direction of each lamination section, the cooling channels of adjacent lamination sections are communicated with each other and are staggered in the circumferential direction, and finally, staggered oil paths are formed; the staggered oil way is communicated with the first cavity and the second cavity. The invention has the advantages of simple structure, less types of punching sheets, good heat exchange effect, low cost and the like.
Description
Technical Field
The invention mainly relates to the technical field of motor cooling, in particular to a stator circumferential staggered oil way cooling motor.
Background
The trend of miniaturization of passenger car motors puts forward increasingly stringent conditions on motor design, and miniaturization of motors can significantly improve power density of motors and reduce weight of electric drive system assemblies, but simultaneously also provides challenges for heat dissipation of motors. The traditional water-cooled motor takes away the heat of the motor when the cooling water flows through the water jacket arranged outside the shell, the heat productivity inside the motor is firstly conducted to the surface of the shell or the water channel, and then the heat productivity is exchanged with the cooling water, and the cooling water can not directly cool the stator iron core, the winding, the rotor, the permanent magnet and other heat generating sources.
The cooling oil of the motor with the oil cooling structure is directly contacted with the heating component, so that the heating problem of the iron core, the winding and the rotor can be well solved, and the cooling component is a new direction for the development of a cooling mode of a motor of a passenger car.
The most serious of new forms of energy permanent magnet motor generates heat is winding and stator core region, and current oil cooling motor carries out refrigerated scheme mainly to stator core and winding simultaneously:
(1) An axial straight channel is arranged on a stator core of the motor, and cooling oil flows through the stator straight channel cooling core and then is sprayed to the end part of a stator winding. The problem of this scheme is that the straight channel disturbance is less, and is not good to stator core cooling effect.
(2) A complex stator core cooling channel is formed by stacking a plurality of types of lamination stack sections, and cooling oil flows through the stator complex channel cooling core and is sprayed to the stator winding end part. The problem of this scheme lies in, although it is effectual to stator cooling, stator punching kind is more, manufacturing cost is high, the material management and control is complicated.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the stator circumferential staggered oil-way cooling motor with simple structure and good heat exchange effect.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a stator circumferential staggered oil-way cooling motor comprises a shell component, an end cover component, a stator component and a rotor component; the shell component and the end cover component are mutually matched to form a cavity, and the stator component and the rotor component are arranged in the cavity and divide the cavity into a first cavity and a second cavity;
the stator assembly comprises a plurality of lamination sections, wherein cooling channels are distributed in the circumferential direction of each lamination section, the cooling channels of adjacent lamination sections are communicated with each other and are staggered in the circumferential direction, and finally, staggered oil paths are formed; the staggered oil way is communicated with the first cavity and the second cavity.
As a further improvement of the above technical scheme:
adjacent lamination stacks are staggered by a certain angle to enable the cooling channels to be communicated with each other and circumferentially staggered with each other.
The forming positions of the cooling channels of the adjacent lamination stack sections are staggered by a certain angle, so that the cooling channels of the adjacent lamination stack sections after being stacked are communicated with each other and are staggered circumferentially.
The rotor assembly comprises a rotating shaft and a rotor core sleeved on the rotating shaft, a rotating shaft oil way in the axial direction is arranged in the rotating shaft, an oil throwing hole communicated with the rotating shaft oil way is formed in the rotating shaft, and the oil throwing hole is right opposite to the end winding.
The cooling channels of adjacent lamination stacks are offset from each other in the radial direction.
The first cavity is internally provided with a first oil injection ring, one end of the first oil injection ring is in sealing contact with the stator assembly, the other end of the first oil injection ring is in sealing contact with the shell assembly or the end cover assembly, and the first oil injection ring is used for dividing the first cavity into an external first oil storage cavity and an internal first cooling cavity; the first oil injection ring is provided with a first oil injection hole which is communicated with the first oil storage cavity and the first cooling cavity, wherein the staggered oil paths are communicated with the first oil storage cavity;
the second oil injection ring is arranged in the second cavity, one end of the second oil injection ring is in sealing contact with the stator assembly, the other end of the second oil injection ring is in sealing contact with the shell assembly or the end cover assembly, and the second oil injection ring is used for dividing the second cavity into an external second oil storage cavity and an internal second cooling cavity; and the second oil injection ring is provided with a second oil injection hole communicated with the second oil storage cavity and the second cooling cavity, wherein the staggered oil ways are communicated with the second oil storage cavity.
The first oil spraying holes on the first oil spraying ring and the second oil spraying holes on the second oil spraying ring are opposite to the stator winding end part of the stator assembly.
An oil inlet and an oil outlet are arranged on the shell component or the end cover component, and the oil inlet is directly communicated with the first oil storage cavity or the second oil storage cavity or the staggered oil way; the end cover assembly and the shell assembly are provided with mutually communicated channels to form a backflow channel, two ends of the backflow channel are respectively communicated with the first cooling cavity and the second cooling cavity, and the backflow channel is communicated with the oil outlet;
when the oil inlet is positioned on the shell component, the diameter of the lamination stack section opposite to the oil inlet is smaller than the inner diameter of the shell component, so that a circumferential annular space is formed between the lamination stack section and the inner wall of the shell component.
Each punching sheet lamination section comprises a plurality of laminated iron core punching sheets, each iron core punching sheet is provided with a through hole, and the through holes of each iron core punching sheet are laminated to form a cooling channel.
The through holes are close to the tooth parts of the iron core punching sheet.
The through holes are rectangular, round or kidney-shaped.
The shell assembly comprises a shell, openings are formed in two ends of the shell, the end cover assembly comprises a front end cover and a rear end cover, and the front end cover and the rear end cover are respectively connected with the openings in two ends of the shell in a sealing mode.
Compared with the prior art, the invention has the advantages that:
1. the first oil storage cavities, the staggered oil ways and the second oil storage cavities are connected, so that the utilization rate of a cooling medium is improved (the mode of connecting the first cavity and the second cavity in parallel is equivalent), and meanwhile, the cooling structure of the motor is simple, and the comprehensive cooling effect is good;
for a certain channel, the flatter the channel is, the flatter the liquid flows, the thicker the boundary layer formed by the corresponding liquid on the inner wall of the channel is, and the worse the heat exchange capability is; and if the turbulence level of the liquid is higher, the corresponding boundary layer is thinner, and the heat exchange capacity is stronger; according to the invention, through the arrangement of the staggered oil paths 304, the flow interference effect (high turbulence) of the oil in the staggered oil paths 304 can be enhanced, so that the corresponding boundary layer is thin, the heat exchange between the oil and the lamination stack 301 is enhanced, the cooling performance of the motor is effectively improved, and the power density of the motor is improved;
the mode that the processing positions of the cooling channels of the adjacent punching sheets are staggered after the rotation angle of the lamination sections is adopted, so that the cooling channels of the adjacent lamination sections are mutually communicated and circumferentially staggered, and finally an staggered oil way is formed, the complex staggered cooling channels can be stacked only through one or two kinds of punching sheets, the material types of the punching sheets are reduced, and the production cost of the punching sheets is reduced.
2. According to the invention, the oil throwing holes communicated with the oil way of the rotating shaft are formed in the circumferential direction of the rotating shaft, the oil throwing holes are right opposite to the end winding, and cooling oil in the blind holes is sprayed to the inner annular surface of the end winding through the oil throwing holes when the rotating shaft rotates during the operation of the motor, so that the heat exchange effect of the inner annular surface of the end winding is enhanced.
3. The invention can cancel the corresponding oil injection ring and set the size of the through hole in the corresponding staggered oil way, so that the cooling oil can convert oil pressure into oil kinetic energy when flowing through the staggered oil way, and has a certain horizontal initial speed when flowing out of the staggered oil way, so that the oil can be injected to the end part along parabola, and the heat exchange effect of the end part winding is enhanced, thereby the whole structure is simpler, and the cost is low (the oil injection ring is cancelled). Of course, the horizontal initial velocity of the outflow staggered oil passages can also be adjusted by the size of the through holes in cooperation with the positions thereof in the radial direction.
4. According to the invention, the through holes on the punching sheet are close to the tooth parts of the punching sheet, so that the cooling channels are positioned on the tooth parts of the stator, and the heat exchange effect of the tooth parts of the stator can be enhanced when cooling liquid flows.
Drawings
Fig. 1 is a cross-sectional view of an embodiment of the motor of the present invention.
Fig. 2 is a perspective view of a stator assembly according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a punch according to the present invention in an embodiment (the punch facing the oil inlet).
Fig. 4 is a schematic structural view of a punched sheet according to the present invention (punched sheet having through holes) in an embodiment.
Fig. 5 is a schematic view of a circumferentially staggered oil passage formed by stacking lamination segments according to the present invention.
Fig. 6 is a perspective view of an oil spray ring of a stator assembly according to an embodiment of the present invention.
Legend description: 1. a housing assembly; 101. a housing; 2. an end cap assembly; 201. a front end cover; 202. a rear end cover; 3. a stator assembly; 301. lamination stacking sections; 3011. iron core punching; 30111. a through hole; 302. a stator winding; 303. a cooling channel; 304. staggered oil paths; 4. a rotor assembly; 401. a rotating shaft; 4011. a rotating shaft oil path; 4012. an oil throwing hole; 402. a rotor core; 5. a first oil injection ring; 501. a first oil injection hole; 6. the second oil spraying ring; 601. a second oil injection hole; 7. a cavity; 701. a first cavity; 7011. a first oil storage chamber; 7012. a first cooling chamber; 702. a second cavity; 7021. a second oil storage chamber; 7022. a second cooling chamber; 703. a return passage; 8. an oil inlet; 9. an oil outlet.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
Embodiment one:
as shown in fig. 1, the stator circumferential staggered oil-way cooling motor of the present embodiment includes a casing assembly 1, an end cover assembly 2, a stator assembly 3 and a rotor assembly 4, wherein the stator assembly 3 includes a stator winding 302 and a stator core (formed by stacking a plurality of lamination segments 301), and the rotor assembly 4 includes a rotating shaft 401 and a rotor core 402; the shell component 1 and the end cover component 2 are matched with each other to form a cavity 7, specifically, the shell component 1 comprises a shell 101, two ends of the shell 101 are open, the end cover component 2 comprises a front end cover 201 and a rear end cover 202, and the front end cover 201 and the rear end cover 202 are respectively connected with the two ends of the shell 101 in a sealing way; the stator assembly 3 and the rotor assembly 4 are installed inside the cavity 7, and divide the cavity 7 into a first cavity 701 and a second cavity 702; the stator assembly 3 comprises a plurality of lamination sections 301, wherein cooling channels 303 (the cooling channels 303 are staggered with corresponding grooves by a certain angle) corresponding to the number of grooves of the stator assembly 3 are distributed in the circumferential direction of each lamination section 301, the cooling channels 303 of adjacent lamination sections 301 are communicated with each other and are staggered with each other in the circumferential direction, and finally a circumferential staggered oil way 304 is formed; wherein the circumferentially staggered oil passages 304 communicate the first cavity 701 and the second cavity 702. Specifically, as shown in fig. 5, by reasonably setting the angle and the number of the cooling channels 303 on the lamination segment 301 and matching with the lamination segment 301 to rotate for a certain angle for stacking, a circumferential staggered oil path 304 is formed (for example, the stator slot number is 48, the lamination through holes 30111 number is 131, the alignment of stator slots can be realized after the lamination rotates for 90 degrees, but the cooling channels 303 are staggered for a certain angle, and at this time, the circumferential staggered oil path 304 can be formed between different lamination segments 301). Of course, in other embodiments, two types of lamination stacks 301 with staggered cooling passages 303 may be produced, and the circumferentially staggered oil passages 304 may also be formed during stacking.
The first oil storage cavities 7011, the staggered oil ways 304 and the second oil storage cavities 7021 are connected, so that the utilization rate of a cooling medium is improved (the mode of connecting the first cavity 701 and the second cavity 702 in parallel is equivalent), and the comprehensive cooling effect is good;
for a certain channel, the flatter the channel is, the flatter the liquid flows, the thicker the boundary layer formed by the corresponding liquid on the inner wall of the channel is, and the worse the heat exchange capability is; and if the turbulence level of the liquid is higher, the corresponding boundary layer is thinner, and the heat exchange capacity is stronger; according to the invention, through the arrangement of the staggered oil paths 304, the flow interference effect (high turbulence) of the oil in the staggered oil paths 304 can be enhanced, so that the corresponding boundary layer is thin, the heat exchange between the oil and the lamination stack 301 is enhanced, the cooling performance of the motor is effectively improved, and the power density of the motor is improved;
by stacking the stacked lamination sections 301 after rotating the angles or staggering the processing positions of the cooling channels 303 of the adjacent lamination sections 301, the cooling channels 303 of the adjacent lamination sections 301 are mutually communicated and circumferentially staggered, and finally, a circumferentially staggered oil way 304 is formed, so that the complex staggered cooling channels 303 can be stacked by only one or two lamination sheets, the lamination sheet material types are reduced, and the production cost of the lamination sheets is reduced.
In a specific embodiment, as shown in fig. 1, a first oil injection ring 5 is disposed in the first cavity 701, one end of the first oil injection ring 5 is in sealing contact with the stator assembly 3, and the other end of the first oil injection ring 5 is in sealing contact with the casing assembly 1 or the end cover assembly 2, and the first oil injection ring 5 is used for separating the first cavity 701 into an external first oil storage cavity 7011 and an internal first cooling cavity 7012; the first oil injection ring 5 is provided with a first oil injection hole 501 which is communicated with a first oil storage cavity 7011 and a first cooling cavity 7012, wherein an interlaced oil way 304 is communicated with the first oil storage cavity 7011; the second cavity 702 is internally provided with a second oil spraying ring 6, one end of the second oil spraying ring 6 is in sealing contact with the stator assembly 3, the other end of the second oil spraying ring 6 is in sealing contact with the casing assembly 1 or the end cover assembly 2, and the second oil spraying ring 6 is used for separating the second cavity 702 into an external second oil storage cavity 7021 and an internal second cooling cavity 7022; the second oil injection ring 6 is provided with a second oil injection hole 601 which is communicated with the second oil storage cavity 7021 and the second cooling cavity 7022, wherein the staggered oil paths 304 are communicated with the second oil storage cavity 7021.
Wherein the first oil jet 501 on the first oil jet ring 5 and the second oil jet 601 on the second oil jet ring 6 are opposite to the end of the stator winding 302 of the stator assembly 3. The cooling oil in the first oil storage cavity 7011 is directly sprayed to the end of the stator winding 302 through the first oil spraying holes 501 on the first oil spraying ring 5, and the end of the stator winding 302 is directly cooled. Similarly, the cooling oil in the second oil storage chamber 7021 is directly sprayed to the end of the stator winding 302 through the second oil spraying holes 601 on the second oil spraying ring 6, and directly cools the end of the stator winding 302. The direct cooling of the ends of the stator windings 302 in the manner described above provides a good cooling effect.
Wherein the first oil spray holes 501 are uniformly distributed on the circumference of the first oil spray ring 5; the second injection holes 601 are uniformly distributed on the circumference of the second injection ring 6. Of course, the specific distribution forms of the first oil jet 501 and the second oil jet 601 are selected according to practical situations, and different pitches (non-uniform) may be selected for arrangement.
In addition, as shown in fig. 6, the first oil injection ring 5 is in a circular ring shape as a whole, and two ends of the first oil injection ring are respectively in sealing contact with the stator core and the front end cover 201; similarly, the second oil injection ring 6 is in an annular shape as a whole, and both ends thereof are respectively in sealing contact with the stator core and the rear end cover 202. In other embodiments, the cross sections of the first oil injection ring 5 and the second oil injection ring 6 are L-shaped, and one ends of the first oil injection ring 5 and the second oil injection ring 6 are in sealing contact with the stator core of the stator assembly 3, while the other ends are in sealing contact with the housing assembly 1. Of course, in other embodiments, the cross-sections of the first injection ring 5 and the second injection ring 6 may be selected to have other suitable shapes.
In a specific embodiment, each lamination stack 301 includes a plurality of lamination core laminations 3011, through holes 30111 are formed in each core lamination 3011, after the through holes 30111 of each core lamination 3011 are laminated, cooling channels 303 are formed, and cooling oil can directly contact with the stator core through the cooling channels 303 to cool the stator core, so that the cooling effect is good. The positions of the through holes 30111 can be set at different radial positions of the core sheet 3011, so long as the adjacent sheet stacking sections 301 are ensured to form staggered oil paths 304, so that cooling oil can flow inside the stator core conveniently. Wherein the preferred location is close to the teeth of the core plate 3011 so that the cooling channels 303 are located in the stator teeth to enhance the heat exchange effect of the stator teeth when the cooling fluid is circulated. Wherein the shape of the through holes 30111 may be rectangular, circular, waist-hole type, or other shapes. Of course, in other embodiments, grooves may be provided on the peripheral edge of the core sheet 3011, and the cooling channels 303 may be formed by stacking the grooves of the core sheets 3011.
In a specific embodiment, the shell assembly 1 or the end cover assembly 2 is provided with an oil inlet 8 and an oil outlet 9, and the oil inlet 8 is directly connected with the first oil storage cavity 7011 or the second oil storage cavity 7021 or the staggered oil way 304; the end cover assembly 2 and the shell assembly 1 are provided with mutually communicated channels to form a backflow channel 703, two ends of the backflow channel 703 are respectively communicated with the first cooling cavity 7012 and the second cooling cavity 7022, and the backflow channel 703 is communicated with the oil outlet 9. When the oil inlet 8 is located on the front end cover 201 or the rear end cover 202, the oil inlet 8 is directly connected to the first oil storage chamber 7011 or the second oil storage chamber 7021. By the arrangement mode of the oil inlet 8, the stator core with the laminated lamination sections 301 is structurally provided with only one type of core lamination 3011, so that the production process of the stator core is simplified, and the production cost is reduced. When the oil inlet 8 is located in the middle of the casing 101, the diameter of the lamination stack 301 opposite to the oil inlet 8 is smaller than the inner diameter of the casing 101, so that a circumferential annular space is formed between the lamination stack 301 and the inner wall of the casing 101, as shown in fig. 2. In this structural form, only two types of core sheets 3011 are needed, so that the production process of the stator core is simplified, and the production cost is reduced. Of course, in the above embodiments, the positions of the oil inlet 8 and the oil outlet 9 are not particularly limited, and the installation positions thereof may be selected to be suitable positions of the integral casing formed by the casing assembly 1 and the end cap assembly 2.
In one embodiment, the stator core of the stator assembly 3 is in an interference fit with the housing 101; wherein the matching between the housing 101 and the front end cover 201 and the rear end cover 202 can be realized by machining, welding or casting, and the manufacturing process is simple and low in cost. The front end cover 201 and the corresponding first oil injection ring 5 can be designed as a whole; correspondingly, the rear end cap 202 and the corresponding second injection ring 6 can also be designed as one piece. The housing 101 may be designed independently, integrally with the front cover 201, or integrally with the rear cover 202.
In the cooling process of the motor, after entering from the oil inlet 8, cooling oil flows to the circumferential annular space of the corresponding lamination stack section 301 to form a circumferential oil ring, then flows to the first oil storage cavity 7011 and the second oil storage cavity 7021 through the staggered oil paths 304 (the stator core is cooled through flowing through the staggered oil paths 304), is sprayed to the stator winding 302 through the oil spraying holes on the corresponding oil spraying rings, cools the end part of the stator winding 302, and then is partially dripped on the surface of the rotor core 402 to cool the rotor core 402, is collected at the bottom of the cavity 7 under the action of gravity, and flows to the oil outlet 9 through the backflow channel 703.
According to the oil-cooled motor, the first oil storage cavity 7011, the staggered oil way 304 and the second oil storage cavity 7021 are connected, so that the utilization rate of a cooling medium is improved (the mode of connecting the first cavity 701 and the second cavity 702 in parallel is equivalent), and meanwhile, the cooling structure of the motor is simple, and the comprehensive cooling effect is good; the cooling medium is directly sprayed to the stator winding 302 and the rotor assembly 4 through each oil spray hole, so that heat generated by the component can be effectively taken away; in addition, the above structural form only needs one or two types of core punching sheets 3011, thereby simplifying the production process of the stator core and reducing the production cost.
The invention can effectively cool the stator core, the stator winding and the rotor, reduce the temperature rise of the stator core and the winding of the motor and improve the reliability of the motor.
Embodiment two:
the difference between this embodiment and the first embodiment is that: the rotating shaft 401 of the rotor assembly 4 is a hollow shaft, a blind hole (rotating shaft oil path 4011) for flowing cooling oil is axially formed, an oil throwing hole 4012 communicated with the rotating shaft oil path 4011 is formed in the circumferential direction of the rotating shaft 401, and the oil throwing hole 4012 is opposite to the end part of the stator winding. When the motor rotates, the rotating shaft 401 sprays cooling oil in the blind hole to the inner annular surface of the end part of the stator winding through the oil throwing hole 4012, the heat exchange effect of the inner annular surface of the end part of the stator winding is enhanced, and then the cooling oil is collected at the bottom of the cavity 7 and flows out through the oil outlet 9. Other matters not described are the same as those of the first embodiment, and are not described herein.
Embodiment III:
the difference between this embodiment and the first embodiment is that: the corresponding oil injection ring is canceled, and the size of the through hole 30111 in the corresponding staggered oil way 304 is set, so that the cooling oil can be converted into oil kinetic energy when flowing through the staggered oil way 304, and a certain horizontal initial speed is realized when flowing out of the staggered oil way 304, so that the oil can be injected to the end part along a parabola, the heat exchange effect of the end part winding is enhanced, the integral structure is simpler, and the cost is low (the oil injection ring is canceled). Of course, the horizontal initial velocity of the outflow-staggered oil passages 304 may be adjusted by the size of the through holes 30111 in cooperation with the positions thereof in the radial direction. Other matters not described are the same as those of the first embodiment, and are not described herein.
Embodiment four:
in this embodiment, the cooling channels 303 of the adjacent lamination stack sections 301 are staggered in the circumferential direction and also staggered in the radial direction, so as to further enhance the flow interference effect of the oil in the staggered oil paths 304 and strengthen the heat exchange between the oil and the lamination stack sections 301. Other matters not described are the same as those of the first embodiment, and are not described herein.
As used in this disclosure and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (12)
1. The stator circumferential staggered oil-way cooling motor is characterized by comprising a shell component (1), an end cover component (2), a stator component (3) and a rotor component (4); the shell component (1) and the end cover component (2) are matched with each other to form a cavity (7), the stator component (3) and the rotor component (4) are arranged inside the cavity (7), and the cavity (7) is divided into a first cavity (701) and a second cavity (702);
the stator assembly (3) comprises a plurality of lamination sections (301), wherein cooling channels (303) are distributed in the circumferential direction of each lamination section (301), the cooling channels (303) of adjacent lamination sections (301) are communicated with each other and are staggered in the circumferential direction, and finally a staggered oil way (304) is formed; the staggered oil way (304) is communicated with the first cavity (701) and the second cavity (702).
2. The stator circumferentially staggered oil cooled motor of claim 1 wherein adjacent lamination stacks (301) are angularly staggered so that the cooling passages (303) are in communication with each other and are circumferentially staggered.
3. The stator circumferential staggered oil cooled electric machine as recited in claim 1, wherein the cooling channels (303) of adjacent lamination stacks (301) are angularly offset so that the cooling channels (303) of adjacent lamination stacks (301) are in communication with each other and are circumferentially offset from each other.
4. The stator circumferential staggered oil-way cooling motor according to claim 1, 2 or 3, wherein the rotor assembly (4) comprises a rotating shaft (401) and a rotor core (402) sleeved on the rotating shaft (401), a rotating shaft oil way (4011) in the axial direction is arranged in the rotating shaft (401), an oil throwing hole (4012) communicated with the rotating shaft oil way (4011) is formed in the rotating shaft (401), and the oil throwing hole (4012) is opposite to the end winding.
5. A stator circumferential staggered oil cooled electric machine according to claim 1 or 2 or 3, characterized in that the cooling channels (303) of adjacent lamination stacks (301) are mutually staggered in radial direction.
6. A stator circumferential staggered oil circuit cooling motor according to claim 1, 2 or 3, wherein a first oil injection ring (5) is arranged in the first cavity (701), one end of the first oil injection ring (5) is in sealing contact with the stator assembly (3), the other end of the first oil injection ring is in sealing contact with the casing assembly (1) or the end cover assembly (2), and the first oil injection ring (5) is used for dividing the first cavity (701) into an external first oil storage cavity (7011) and an internal first cooling cavity (7012); the first oil injection ring (5) is provided with a first oil injection hole (501) which is communicated with the first oil storage cavity (7011) and the first cooling cavity (7012), wherein an interlaced oil way (304) is communicated with the first oil storage cavity (7011);
a second oil injection ring (6) is arranged in the second cavity (702), one end of the second oil injection ring (6) is in sealing contact with the stator assembly (3), the other end of the second oil injection ring is in sealing contact with the shell assembly (1) or the end cover assembly (2), and the second oil injection ring (6) is used for dividing the second cavity (702) into an external second oil storage cavity (7021) and an internal second cooling cavity (7022); the second oil injection ring (6) is provided with a second oil injection hole (601) which is communicated with the second oil storage cavity (7021) and the second cooling cavity (7022), wherein the staggered oil way (304) is communicated with the second oil storage cavity (7021).
7. The stator circumferential staggered oil cooled electric machine of claim 6, wherein the first oil jet (501) on the first oil jet ring (5) and the second oil jet (601) on the second oil jet ring (6) are each opposite to the stator winding (302) ends of the stator assembly (3).
8. The stator circumferential staggered oil way cooling motor according to claim 6, wherein an oil inlet (8) and an oil outlet (9) are arranged on the casing assembly (1) or the end cover assembly (2), and the oil inlet (8) is directly communicated with the first oil storage cavity (7011) or the second oil storage cavity (7021) or the staggered oil way (304); the end cover assembly (2) and the shell assembly (1) are provided with mutually communicated channels to form a backflow channel (703), two ends of the backflow channel (703) are respectively communicated with the first cooling cavity (7012) and the second cooling cavity (7022), and the backflow channel (703) is communicated with the oil outlet (9);
when the oil inlet (8) is positioned on the shell component (1), the diameter of the lamination stack section (301) opposite to the oil inlet (8) is smaller than the inner diameter of the shell component (1), so that a circumferential annular space is formed between the lamination stack section (301) and the inner wall of the shell component (1).
9. A stator circumferential staggered oil cooling motor according to claim 1, 2 or 3, wherein each lamination stack (301) comprises a plurality of lamination core laminations (3011), each core lamination (3011) is provided with a through hole (30111), and the through holes (30111) of each core lamination (3011) are laminated to form a cooling channel (303).
10. The stator circumferential staggered oil cooled electric machine of claim 9 wherein the through holes (30111) are proximate to teeth of the core laminations (3011).
11. The stator circumferential staggered oil cooled electric machine of claim 9, wherein the through holes (30111) are rectangular, circular, or kidney shaped.
12. A stator circumferential staggered oil cooled electric machine according to claim 1 or 2 or 3, characterized in that the housing assembly (1) comprises a housing (101), both ends of the housing (101) are open, the end cap assembly (2) comprises a front end cap (201) and a rear end cap (202), and the front end cap (201) and the rear end cap (202) are respectively in sealing connection with both ends of the housing (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211193232.4A CN117833507A (en) | 2022-09-28 | 2022-09-28 | Stator circumference staggered oil way cooling motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211193232.4A CN117833507A (en) | 2022-09-28 | 2022-09-28 | Stator circumference staggered oil way cooling motor |
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| Publication Number | Publication Date |
|---|---|
| CN117833507A true CN117833507A (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211193232.4A Pending CN117833507A (en) | 2022-09-28 | 2022-09-28 | Stator circumference staggered oil way cooling motor |
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| CN (1) | CN117833507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118263998A (en) * | 2024-05-28 | 2024-06-28 | 小米汽车科技有限公司 | Stator, motor and vehicle |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118263998A (en) * | 2024-05-28 | 2024-06-28 | 小米汽车科技有限公司 | Stator, motor and vehicle |
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