CN114374282A - Heat radiation structure and motor of stator core - Google Patents
Heat radiation structure and motor of stator core Download PDFInfo
- Publication number
- CN114374282A CN114374282A CN202210274561.5A CN202210274561A CN114374282A CN 114374282 A CN114374282 A CN 114374282A CN 202210274561 A CN202210274561 A CN 202210274561A CN 114374282 A CN114374282 A CN 114374282A
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- Prior art keywords
- oil passing
- stator core
- silicon steel
- mounting
- lug
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- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention provides a heat dissipation structure of a stator core and a motor, comprising a plurality of oil passing channels, wherein the oil passing channels are all arranged on an installation boss of the stator core, two ends of each oil passing channel are respectively communicated with two side spaces of the installation boss, and the flowing direction of a cooling medium at any end of each oil passing channel points to the outer surface of the stator core, so that the installation bosses on the stator core are communicated, and the cooling medium can flow through the installation bosses on the stator core and flow through the surface of the whole stator core. The stator core cooling structure has the advantages that the plurality of oil passing channels are arranged on the mounting boss of the stator core, so that the spaces on the two sides of the mounting boss are communicated through the oil passing channels, cooling media flowing on the outer circular surface of the stator core can pass through the oil passing channels, the cooling media can flow through the whole outer circular surface of the stator core, the flowing area of the cooling media is increased, the stator core is cooled, and the heat dissipation effect of a motor is improved.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a heat dissipation structure of a stator core and a motor.
Background
When a motor of an automobile works and the motor outputs peak torque, motor loss is mainly generated by winding, and a large amount of cooling medium is needed to directly cool the winding; when the motor outputs the peak rotating speed, the motor loss is mainly generated by the stator core, and a large amount of cooling medium is needed to directly cool the excircle of the stator core.
The cooling mode of present motor arranges the oil spout pipe and designs the nozzle opening on spouting the oil spout pipe near motor stator top and wire winding tip, and cooling medium sprays to stator core excircle face and winding wire tip from the nozzle opening. One of the stator cores in the structure is not provided with a mounting hole; one is provided with a mounting boss and is connected by using a bolt; the structure without the mounting boss is in interference fit with the shell during mounting, the stator core cannot be in full contact with a cooling medium, the heat dissipation performance is poor, and the overall temperature is increased; the structure with the mounting boss is shown in fig. 2, cooling medium flows along the outer surface of the iron core under the action of gravity, the protruding mounting boss can block the cooling medium, the outer diameter of the stator iron core cannot be fully contacted with the cooling medium, the heat dissipation performance is poor, and local hot spots can be formed.
Disclosure of Invention
In view of the above problems, the present invention provides a heat dissipation structure for a stator core and a motor, so as to solve the above or other former problems in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a stator core's heat radiation structure, includes a plurality of oily passageways of crossing, a plurality of oily passageways of crossing are all located stator core's installation boss, each both ends of crossing oily passageway respectively with the both sides space intercommunication of installation boss, and cross the directional stator core's of the direction that the coolant of arbitrary end of oily passageway flowed out surface to make a plurality of installation boss intercommunications on the stator core, so that coolant flows through a plurality of installation bosses on the stator core, flow through whole stator core surface.
Furthermore, the oil passing channel is arranged on the outer circle surface of the mounting boss close to the stator core.
Furthermore, the installation boss includes a plurality of installation lugs, and a plurality of installation lugs are coaxial to be set up, and each installation lug is located a stator core's silicon steel sheet, is provided with an oilhole on each installation lug at least, and a plurality of oilholes set gradually along installation lug one side to opposite side.
Furthermore, in a plurality of mounting lugs forming an oil passing channel, oil passing holes on two adjacent mounting lugs are arranged in a staggered mode, and one oil passing hole on one mounting lug is at least communicated with an adjacent oil passing hole on the other mounting lug.
Furthermore, any one of the two adjacent mounting lugs is at least provided with an oil passing hole which penetrates through one side and is communicated with the outside, so that two ends of the oil passing channel are respectively communicated with two sides of the mounting lug.
Furthermore, each silicon steel sheet is provided with a plurality of installation lugs, and a plurality of installation lugs set gradually along the circumference of silicon steel sheet, and a plurality of installation lug's of each silicon steel sheet position one-to-one when a plurality of silicon steel sheet closed assembly constructs a plurality of installation boss structure.
Further, stator core includes the multiunit silicon steel sheet, and the coaxial setting of multiunit silicon steel sheet is laminated in proper order along stator core's axis direction, and in each group silicon steel sheet, including multiple type silicon steel sheet, the oilhole setting position on the installation lug of the silicon steel sheet of different grade type is different.
Furthermore, each group of silicon steel sheets comprises a silicon steel sheet at least provided with an oil passing hole communicated with any side edge of the installation lug and a silicon steel sheet with the oil passing hole positioned in the middle of the installation lug, and when the silicon steel sheets are stacked, the silicon steel sheet with the oil passing hole communicated with one side edge of the installation lug, the silicon steel sheet with the oil passing hole positioned in the middle of the installation lug and the silicon steel sheet with the oil passing hole communicated with the other side edge of the installation lug are sequentially stacked.
Furthermore, on each silicon steel sheet of stator core, the setting position of the oil passing hole on two adjacent installation lugs is different, and at least one oil passing hole that is communicated with one side is included in a plurality of oil passing holes on one of the installation lugs, and a plurality of oil passing holes on the other installation lug are located in the middle part, and when a plurality of silicon steel sheets are stacked, two adjacent silicon steel sheets rotate an angle to be stacked, and the angle is the angle between two adjacent installation lugs.
Furthermore, each oil passing channel at least comprises two oil passing holes, and the oil passing holes are communicated in sequence.
Furthermore, when the number of the oil passing holes forming each oil passing channel is two, the length of any oil passing hole is larger than half of the width of the mounting lug, so that the two oil passing holes are communicated.
Furthermore, when the number of the oil passing holes forming each oil passing channel is three, the oil passing holes respectively communicated with the two side edges of the mounting lug and the oil passing hole positioned in the middle of the mounting lug are included, and the length of the oil passing hole positioned in the middle of the mounting lug is larger than the distance between the two oil passing holes respectively communicated with the two side edges of the mounting lug, so that the three oil passing holes are communicated.
Furthermore, when the number of the oil passing holes forming each oil passing channel is more than three, the oil passing holes respectively communicated with the two side edges of the mounting lug and the oil passing holes positioned in the middle of the mounting lug are included, and the oil passing holes communicated with one side edge of the mounting lug, the oil passing holes in the middle of the mounting lug and the oil passing holes communicated with the other side edge of the mounting lug are sequentially communicated.
Furthermore, the outer surface of the stator core is provided with a plurality of mutually staggered bulges.
A motor comprises the heat dissipation structure of the stator core.
By adopting the technical scheme, the installation boss of the stator core is provided with the plurality of oil passing channels, so that the spaces at the two sides of the installation boss are communicated through the oil passing channels, the cooling medium flowing on the outer circular surface of the stator core can pass through the oil passing channels, the cooling medium can flow through the whole outer circular surface of the stator core, the flowing area of the cooling medium is increased, the stator core is cooled, the heat dissipation capacity of the stator core is improved, and the heat dissipation effect of the motor is improved; the bulges are arranged on the outer circular surface of the stator core in a staggered mode, a cooling medium circulation channel can be formed on the outer circular surface of the stator core and is communicated with the oil passage, so that cooling medium flows along the cooling medium circulation channel and the oil passage and flows through the whole outer circular surface of the stator core, the heat dissipation capacity of the middle part of the stator core is improved, the flow of the cooling medium is increased, and the heat dissipation performance of the motor is improved.
Drawings
FIG. 1 is a schematic structural diagram of a stator according to an embodiment of the present invention;
FIG. 2 is a schematic view of a prior art stator mounted within a housing;
FIG. 3 is a schematic structural view of a stator mounted in a housing according to an embodiment of the present invention;
FIG. 4A is a schematic view of a mounting lug for an oil passage having two oil passages according to an embodiment of the present invention;
FIG. 4B is a schematic cross-sectional view of the oil passage hole of FIG. 4A;
FIG. 5A is a schematic structural view of another mounting lug when the oil passage has two oil passing holes according to an embodiment of the present invention;
FIG. 5B is a schematic cross-sectional view of the oil passage hole of FIG. 5A;
FIG. 6A is a schematic view of the mounting lug of FIG. 4A stacked with the mounting lug of FIG. 5A;
FIG. 6B is a schematic cross-sectional view of the oil passage hole of FIG. 6A;
FIG. 7A is a schematic view of a mounting lug for an oil passage having three oil passages according to an embodiment of the present invention;
FIG. 7B is a schematic cross-sectional view of the oil passage hole of FIG. 7A;
FIG. 8A is a schematic structural view of another installation lug when the oil passage has three oil passing holes according to an embodiment of the present invention;
FIG. 8B is a schematic cross-sectional view of the oil passage hole of FIG. 8A;
FIG. 9A is a schematic structural view of a third installation lug when the oil passage has three oil passing holes according to an embodiment of the present invention;
FIG. 9B is a schematic cross-sectional view of the oil passage hole of FIG. 9A;
FIG. 10A is a schematic view of the structure of the mounting lugs of FIGS. 7A, 8A and 9A stacked together;
FIG. 10B is a schematic cross-sectional view of the oil passage hole of FIG. 10A;
FIG. 11A is a schematic structural view of a mounting lug when the number of oil passing holes of the oil passing channel is more than three according to an embodiment of the present invention;
FIG. 11B is a schematic cross-sectional view of FIG. 11A at the oil passage hole;
FIG. 12A is a schematic structural view of another mounting lug when the number of oil passing holes of the oil passing channel is more than three according to an embodiment of the invention;
FIG. 12B is a schematic cross-sectional view of the oil passage hole of FIG. 12A;
FIG. 13A is a schematic view of the mounting lugs of FIGS. 11A and 12A stacked together;
FIG. 13B is a schematic cross-sectional view of the oil passage hole of FIG. 13A;
FIG. 14 is a schematic cross-sectional view of a plurality of mounting lugs at an oil passage hole after stacking in accordance with an embodiment of the present invention;
fig. 15 is a schematic structural view of a silicon steel sheet of a stator core according to an embodiment of the present invention;
fig. 16 is a schematic structural view of a stator core according to an embodiment of the present invention, in which protrusions are formed on an outer circumferential surface of the stator core;
FIG. 17 is a front view schematic of the structure of FIG. 16;
FIG. 18 is a schematic view of the stator of FIG. 16 mounted in a housing;
FIG. 19 is a schematic view of the cross-sectional A-A configuration of FIG. 18;
FIG. 20 is a schematic view of the cross-sectional structure B-B of FIG. 18;
FIG. 21 is a cross-sectional view of a mounting boss according to an embodiment of the present invention;
FIG. 22 is a schematic diagram of a first oil passing channel configuration according to an embodiment of the present invention;
FIG. 23 is a schematic structural view of a second oil passage shape according to an embodiment of the present invention;
FIG. 24 is a schematic structural view of a third oil passage shape according to an embodiment of the present invention;
FIG. 25 is a schematic diagram of a fourth oil passage configuration in accordance with an embodiment of the present invention;
fig. 26 is a schematic structural view of a fifth oil passage shape according to an embodiment of the present invention.
In the figure:
1. oil spout pipe 2, nozzle opening 3, casing
4. Stator core 5, installation boss 6, oil passing hole
7. Oil passing channel 50, mounting lug 8 and protrusion.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Fig. 1 shows a schematic structural diagram of an embodiment of the present invention, and the embodiment relates to a heat dissipation structure of a stator core and a motor, which are used for heat dissipation of the motor, wherein an oil passage is arranged on an installation boss of the stator core, so that the installation boss is communicated with spaces on two sides, and a cooling medium flowing on the surface of the stator core can flow through the oil passage and flow through the outer surface of the whole stator core to cool the motor, thereby improving the heat dissipation effect of the motor.
A heat dissipation structure of a stator core is disclosed, as shown in figure 1, comprising a plurality of oil passing channels 7, wherein the plurality of oil passing channels 7 are all arranged on a mounting boss 5 of a stator core 4, two ends of each oil passing channel 7 are respectively communicated with two side spaces of the mounting boss 5, and the outflow direction of a cooling medium at any end of each oil passing channel 7 points to the outer surface of the stator core 4, so that the mounting bosses 5 on the stator core 4 are communicated, so that the cooling medium flows through the mounting bosses 5 on the stator core 4, flows through the surface of the whole stator core 4, the cooling medium flowing out from an oil injection hole 2 of an oil injection pipe 1 is directly sprayed onto the outer surface of the stator core 4 and is directly sprayed onto the outer surface of the stator core 4 between two adjacent mounting bosses 5, the cooling medium flows along the outer surface of the stator core 4 and flows through the oil passing channels 7 on the mounting bosses 5 under the action of gravity, the surface of whole stator core 4 of flowing through increases cooling medium's the region that sprays for stator core 4 fully contacts with cooling medium, improves the heat dispersion of motor, improves the radiating effect.
Adopt this stator core's heat radiation structure to dispel the heat to the motor, as shown in fig. 3, the stator is installed in casing 3, fixed mounting has oil spout pipe 1 on the casing 3, its coolant enters in oil spout pipe 1 from the outside, and spout from nozzle opening 2, spray on the outer disc of stator core 4, and flow along the outer disc, pass oil channel 7, the outer disc of whole stator core 4 of flowing through, stator coolant sprays the region and compares with current (as shown in fig. 2, current coolant sprays the back from nozzle opening 2, flow between two adjacent installation bosss 5, blockked by installation boss 5), spray regional increase.
Two ends of each oil passing channel 7 are respectively communicated with the spaces at two sides of the mounting boss 5, so that a cooling medium can flow along the oil passing channels 7 and pass through the oil passing channels 7, and the spaces at two sides of the mounting boss 5 are communicated. Therefore, the overall flow direction of each oil passing channel 7 is approximately in the direction from one side surface of the mounting boss 5 to the other side surface, so that each oil passing channel 7 can communicate with the spaces on both sides of the mounting boss 5.
The mounting boss 5 comprises a plurality of mounting lugs 50, the mounting lugs 50 are coaxially arranged, each mounting lug 50 is arranged on a silicon steel sheet of the stator core 4, each mounting lug 50 is at least provided with an oil passing hole 6, the oil passing holes 6 are sequentially arranged from one side to the other side of the mounting lug 50, the mounting lugs 50 are sequentially stacked along the length direction of the mounting boss 5 to construct the structure of the mounting boss 5, each mounting lug 50 is arranged on one silicon steel sheet, the number of the mounting lugs 50 is consistent with the number of the silicon steel sheets forming the stator core 4, the mounting lugs 50 are respectively arranged on the corresponding silicon steel sheets, the oil passing holes 6 arranged on each mounting lug 50 are sequentially arranged along the width direction of the mounting lug 50, the number of the oil passing holes 6 is selected and arranged according to the width of the mounting lug 50 and the length of the oil passing hole 6, no particular requirement is made here. When a plurality of mounting lugs 50 are stacked, the oil passing holes 6 on two adjacent mounting lugs 50 are arranged in a staggered manner, so that in the plurality of mounting lugs 50 forming one oil passing channel 7, the oil passing holes 6 on two adjacent mounting lugs 50 are arranged in a staggered manner, and two adjacent oil passing holes 6 on two adjacent mounting lugs 50 are partially overlapped, so that one oil passing hole 6 on one mounting lug 50 is at least communicated with one adjacent oil passing hole 6 on the other mounting lug 50, and the plurality of communicated oil passing holes 6 form an oil passing channel 7 structure from one side of the mounting lug 5 to the other side. When the oil passing holes 6 of two adjacent mounting lugs 50 are arranged, one oil passing hole 6 of one mounting lug 50 can be communicated with an adjacent oil passing hole 6 of the other mounting lug 50, or one oil passing hole 6 of one mounting lug 50 can be communicated with two adjacent oil passing holes 6 of the other mounting lug 50, so as to control the shape and the flow direction of the formed oil passing channel 7, and the arrangement is selected according to actual requirements, which is not specifically required.
Meanwhile, any one of the two adjacent mounting lugs 50 is provided with at least one oil passing hole 6 which penetrates through one side and is communicated with the outside, so that two ends of the oil passing channel 7 are respectively communicated with two sides of the mounting lug 50, in the two adjacent mounting lugs 50, one oil passing hole 6 which penetrates through one side can be arranged on one mounting lug 50, or two oil passing holes 6 can be respectively arranged on one mounting lug 50, and the two oil passing holes 6 are respectively oil passing holes 6 which penetrate through two sides of the mounting lug 50 and are selectively arranged according to actual requirements, and no specific requirement is made here. The oil through hole 6 penetrating one side is arranged, so that the cooling medium flowing along the outer circumferential surface of the stator core 4 can enter the oil through hole 6 into the oil through channel 7 and flow along the oil through channel 7.
Each oil passing channel 7 at least comprises two oil passing holes 6, the oil passing holes 6 are sequentially communicated, and an oil passing channel 7 structure is constructed, namely, the number of the oil passing holes 6 forming each oil passing channel 7 can be two, three or more, and the oil passing channels are selected and arranged according to actual requirements, and no specific requirement is made here.
As shown in fig. 1 and 15, each silicon steel sheet is provided with a plurality of mounting lugs 50, the plurality of mounting lugs 50 are sequentially arranged along the circumferential direction of the silicon steel sheet, the positions of the plurality of mounting lugs 50 of each silicon steel sheet are in one-to-one correspondence when the plurality of silicon steel sheets are stacked, a plurality of mounting bosses 5 are constructed, and the plurality of mounting bosses 5 are sequentially arranged along the circumferential direction of the stator core 4.
According to constituting the position difference that sets up of crossing the oilhole 6 on the installation lug 50 of crossing oil passageway 7, stator core 4 includes multiunit silicon steel sheet, and multiunit silicon steel sheet is coaxial to be set up, and along stator core 4's axis direction stack dress in proper order, in each group silicon steel sheet, including multiple type silicon steel sheet, the oilhole 6 that crosses on the installation lug 50 of the silicon steel sheet of different grade type sets up the position difference to constitute a plurality of oil passageways 7 of crossing. Specifically, each group of silicon steel sheets comprises at least one silicon steel sheet with an oil passing hole 6 communicated with any side edge of the mounting lug 50 and a silicon steel sheet with the oil passing hole 6 positioned in the middle of the mounting lug 50, and when the silicon steel sheets are stacked, the silicon steel sheet with the oil passing hole 6 communicated with one side edge of the mounting lug 50, the silicon steel sheet with the oil passing hole 6 positioned in the middle of the mounting lug 50 and the silicon steel sheet with the oil passing hole 6 communicated with the other side edge of the mounting lug 50 are sequentially stacked, so that the oil passing holes 6 close to each other on the two adjacent mounting lugs 50 are communicated, and a plurality of oil passing channel 7 structures are formed.
Or, the types of the silicon steel sheets of the stator core 4 are the same, the oil passing holes 6 in two adjacent mounting lugs 50 are arranged at different positions on each silicon steel sheet, at least one oil passing hole 6 which is communicated with one side edge is formed in the oil passing holes 6 in one mounting lug 50, the oil passing holes 6 in the other mounting lug 50 are located in the middle, when the silicon steel sheets are stacked, the two adjacent silicon steel sheets rotate by an angle to be stacked, the angle is the angle between the two adjacent mounting lugs 50, and the structure of each silicon steel sheet is the same. When the silicon steel sheet is installed, the first silicon steel sheet is taken as a basis, the second silicon steel sheet is aligned with the first silicon steel sheet, then the second silicon steel sheet is rotated by the angle, and the second silicon steel sheet is stacked; then align third silicon steel sheet and second silicon steel sheet, later rotate the third silicon steel sheet, rotate an above-mentioned angle, carry out fourth silicon steel sheet closed assembly again, … …, analogize in proper order, until the installation of last silicon steel sheet, a plurality of oil holes 6 staggered arrangement are crossed on two adjacent installation lugs 50, and the oil holes 6 that cross that are close to on two adjacent installation lugs 50 are linked together to it constructs a plurality of oil channels 7 to be convenient for each installation boss 5.
As shown in fig. 21, the adjacent oil passing holes 6 on two adjacent mounting lugs 50 are communicated, the oil passing holes 6 are through holes, the depth a of each oil passing hole 6 is consistent with the thickness of the mounting lug 50, the oil passing hole 6 on one mounting lug 50 corresponds to the hole wall of the oil passing hole 6 on the other mounting lug 50, and the length of each oil passing hole 6 is greater than the thickness of the hole wall of the oil passing hole 6, so that the hole wall of each oil passing hole 6 cannot completely shield the oil passing hole 6, and a gap b is formed, so that the adjacent oil passing holes 6 on two adjacent mounting lugs 50 are communicated. The depth a of the oil passing hole 6 and the size of the gap b are selected according to the structural size of the motor, the flow rate of the cooling medium and other parameters, and no specific requirement is made here.
Specifically, as shown in fig. 4A to 6B, when the number of oil passing holes 6 constituting each oil passing passage 7 is two, the length of any one oil passing hole 6 is greater than half the width of the installation lug 50, so that the two oil passing holes 6 are communicated, the two oil passing holes 6 are respectively positioned on two adjacent mounting lugs 50, one mounting lug 50 is provided with one oil passing hole 6 communicated with one side edge, the other mounting lug 50 is provided with one oil passing hole 6 communicated with the other side edge, when the two mounting lugs 50 are stacked, because the length of the two oil passing holes 6 is more than half of the width of the mounting lug 50, therefore, the two oil passing holes 6 are partially overlapped, the overlapped portion makes the two oil passing holes 6 communicate with each other, and an oil passing channel 7 formed by the two oil passing holes 6 is a passage, so that the cooling medium flows in the oil passing channel 7.
As shown in fig. 7A-10B, when the number of the oil passing holes 6 forming each oil passing channel 7 is three, the oil passing holes 6 respectively communicating with two sides of the mounting lug 50 and one oil passing hole 6 located in the middle of the mounting lug 50 are included, the length of the oil passing hole 6 located in the middle of the mounting lug 50 is greater than the distance between the two oil passing holes 6 respectively communicating with two sides of the mounting lug 50, so that the three oil passing holes 6 are communicated, the three oil passing holes 6 can be respectively located on three adjacent mounting lugs 50, along the stacking direction of the three mounting lugs 50, the first mounting lug 50 is provided with one oil passing hole 6 passing through one side, the second mounting lug 50 is provided with one oil passing hole 6 in the middle, the third mounting lug 50 is provided with one oil passing hole 6 passing through the other side, and the length of the oil passing hole 6 on the second mounting lug 50 is greater than the length of the oil passing hole 6 on the first mounting lug 50 and the third mounting lug 50 The distance between the oil passing holes 6 on the mounting lugs 50 is such that the oil passing hole 6 on the second mounting lug 50 overlaps the oil passing hole 6 on the first mounting lug 50 and the oil passing hole 6 on the third mounting lug 50, so that the three oil passing holes 6 are communicated in sequence, and the oil passing channel 7 formed by the three oil passing holes 6 is a passage for the cooling medium to flow in the oil passing channel 7. Or, the three oil passing holes 6 are respectively located on two adjacent mounting lugs 50 on the same silicon steel sheet, one mounting lug 50 is provided with two oil passing holes 6, one of the two oil passing holes 6 is the oil passing hole 6 penetrating through one side edge of the mounting lug 50, the other is the oil passing hole 6 penetrating through the other side edge of the mounting lug 50, and one oil passing hole 6 on the other mounting lug 50 is located at the middle position of the mounting lug 50, when the oil passing channel 7 is constructed, the two silicon steel sheets are stacked, the mounting lugs 50 of the two silicon steel sheets are aligned, the first silicon steel sheet is taken as a base, the second silicon steel sheet rotates by an angle which is an angle between the two mounting lugs 50, so that the mounting lug 50 with one oil passing hole 6 on the second silicon steel sheet corresponds to the mounting lug 50 with the two oil passing holes 6 of the first silicon steel sheet, the three oil passing holes 6 are communicated, and the constructed oil passing channel 7 is a passage, so that the cooling medium can flow in the oil passing channel 7.
As shown in fig. 11A-14, when the number of the oil passing holes 6 forming each oil passing channel 7 is greater than three, the oil passing holes 6 include two oil passing holes 6 respectively communicating with both side edges of the mounting lug 50 and a plurality of oil passing holes 6 located in the middle of the mounting lug 50, the oil passing holes 6 communicating with one side edge of the mounting lug 50, the oil passing holes 6 in the middle of the mounting lug 50 and the oil passing holes 6 communicating with the other side edge of the mounting lug 50 in sequence, the oil passing holes 6 may be located on the same silicon steel sheet, and the oil passing holes 6 are arranged in two groups, one group includes the oil passing hole 6 passing through one side edge of the mounting lug 50, the oil passing hole 6 passing through the other side edge of the mounting lug 50 and the oil passing holes 6 located between the two oil passing holes 6, the other group includes the oil passing holes 6 located at the middle of the mounting lug 50, the two groups of oil passing holes 6 are respectively located on two adjacent mounting lugs 50 of the silicon steel sheet, when the two adjacent silicon steel sheets are stacked, the two silicon steel sheets are aligned, the mounting lugs 50 correspond to one another, the first silicon steel sheet is taken as a basis, the second silicon steel sheet is rotated by an angle relative to the first silicon steel sheet for stacking, the oil passing holes 6 on the two adjacent mounting lugs 50 are arranged in a staggered manner, and are communicated with each other, the oil passing channels 7 are constructed as passages, the third silicon steel sheet rotates the same angle relative to the second silicon steel sheet, the oil passing channels 7 on the three adjacent mounting lugs 50 are arranged in a staggered way, and the oil passing holes 6 which are close to each other along the length and the width direction of the mounting boss 5 are communicated, the fourth silicon steel sheet rotates by the same angle relative to the third silicon steel sheet, … …, and the oil passing channels 7 which are close to each other on the adjacent mounting lugs 50 are communicated to form a plurality of communicated oil passing channels 7. Or, a plurality of oilholes 6 are located respectively on two silicon steel sheets, when two silicon steel sheets stacked, on two installation lugs 50 of adjacent silicon steel sheet, set up a plurality of oilholes 6 on an installation lug 50, including a through oilhole 6 that passes an installation lug 50 side, a through oilhole 6 that passes another side of installation lug 50 and a plurality of oilholes 6 that are located between two oil holes 6, another installation lug 50's middle part position sets up a plurality of oilholes 6 of passing, two silicon steel sheets are a set of, have multiunit silicon steel sheet, after the stack dress in proper order, the oilhole 6 that passes that is close to mutually on two adjacent installation lugs 50 is linked together, construct a plurality of oily passageways 7 of passing that are linked together. In a plurality of oil passing holes 6 located in the middle of the mounting lug 50, the lengths of the oil passing holes 6 can be the same or different, and the oil passing holes are selected according to actual requirements without specific requirements.
In a further optimized scheme, as shown in fig. 16-20, a plurality of protrusions 8 are arranged on the outer surface of the stator core 4 in a staggered manner, so that heat dissipation in the middle of the stator core 4 is increased, the flow of the cooling medium is increased, and the heat dissipation performance of the motor is improved. Specifically, a plurality of protrusions 8 are arranged on the outer circle portion of the silicon steel sheet of the stator core 4 (that is, the outer circle portion of the silicon steel sheet between two adjacent mounting lugs 50), the plurality of protrusions 8 are arranged at intervals, the distance between two adjacent protrusions 8 is greater than the length of the protrusion 8, when the plurality of silicon steel sheets are stacked, the protrusions 8 of the corresponding outer circle portions on two adjacent silicon steel sheets are arranged in a staggered manner, the gap between two adjacent protrusions 8 of one silicon steel sheet is shielded by one protrusion 8 at the corresponding position on the other silicon steel sheet, and because the size of the gap is greater than the size of the protrusion 8, the gap is communicated with the gaps on two sides of the protrusion 8 corresponding to the gap, so as to form a flow channel for the cooling medium, so that the cooling medium flows along the flow channel and flows through the oil flow channel 7 on the mounting lug 5, the circulation channel is communicated with the oil passage 7 and flows through the whole stator core 4, so that the heat dissipation performance of the stator core 4 is improved. The arrangement of the protrusion 8 is selected according to parameters such as the installation structure of the motor stator and the loss of the motor, and the like, and is not specifically required here.
As shown in fig. 22, after a plurality of silicon steel sheets constituting the stator core 4 are stacked, each mounting boss 5 has a plurality of oil passing channels 7, the plurality of oil passing channels 7 are communicated with each other, and a cooling medium enters from an oil passing hole 6 on one side of any one of the mounting lugs 50, flows to the oil passing holes 6 on both sides of the oil passing hole 6, and flows out from the other side of the mounting boss 5, so that the oil passing channels 7 are in a shape of a Chinese character 'ba'.
As shown in fig. 23, after a plurality of silicon steel sheets constituting the stator core 4 are stacked, each of the mounting bosses 5 has a plurality of oil passing passages 7, the plurality of oil passing passages 7 are communicated with each other, and the cooling medium flows into each of the oil passing passages 7 from one side surface of the mounting boss 5, flows in the mounting boss 5 in a crossing manner, forms a mesh shape, and flows out from the other side surface of the mounting boss 5, so that the oil passing passages are in the mesh shape.
As shown in fig. 24, after a plurality of silicon steel sheets constituting the stator core 4 are stacked, each mounting boss 5 has a plurality of oil passing channels 7, the plurality of oil passing channels 7 are communicated with each other, a cooling medium enters from one oil passing hole 6 of one side of any mounting lug 50, then enters into an oil passing hole adjacent to the oil passing hole 6 of another mounting lug 50 adjacent to the mounting lug 50, and flows in sequence from the oil passing hole 6 and then enters into the oil passing hole adjacent to the oil passing hole 6 on the previous mounting lug 50, so that the oil passing channels 7 are in a serpentine shape.
As shown in fig. 25, after a plurality of silicon steel sheets constituting the stator core 4 are stacked, each mounting boss 5 has a plurality of oil passing channels 7, the plurality of oil passing channels 7 are communicated with each other, any oil passing hole 6 on any mounting lug 50 is communicated with two adjacent oil passing holes 6 on the mounting lugs 50 on both sides, a cooling medium enters from one oil passing hole 6 on any mounting lug 50 through one side, and sequentially flows into the communicated oil passing holes 6 on each mounting lug 50 on one side of the mounting lug 50, and the oil passing holes 6 are sequentially arranged toward the other side of the mounting boss, so that the oil passing channels 7 are in an inclined linear shape.
As shown in fig. 26, after a plurality of silicon steel sheets constituting the stator core 4 are stacked, each of the mounting bosses 5 has a plurality of oil passing passages 7, the oil passing passages 7 are not communicated with each other, the oil passing passages 7 are separated from each other, and each of the oil passing passages 7 has an inclined straight line shape.
The shape of the oil passing hole 6 can be square, circular, oval or rhombic, and the oil passing hole is selected according to actual requirements and is not specifically required.
A motor includes the heat radiation structure of the stator core 4 as described above.
When the motor works, a cooling medium enters the oil injection pipe 1 from the outside, flows in the oil injection pipe 1, is sprayed out from the oil injection hole 2, is sprayed onto the outer circumferential surface of the stator core 4, flows along the outer circumferential surface of the stator core 4, and flows to the mounting boss 5, enters the oil passing channel 7 from the oil passing hole 6 on one side surface of the mounting boss 5 facing the cooling medium, flows in the oil passing channel 7, flows out from the other side surface of the mounting boss 5, continues to flow along the outer circumferential surface of the stator core 4 until flowing through the whole stator core 4, the mounting boss 5 is provided with a plurality of oil passing channels 7, the cooling medium is not blocked any more, the cooling medium can flow through the outer circumferential surface of the whole stator core 4 under the action of gravity, and the heat dissipation capacity of the stator core 4 is enhanced.
By adopting the technical scheme, the installation boss of the stator core is provided with the plurality of oil passing channels, so that the spaces at the two sides of the installation boss are communicated through the oil passing channels, the cooling medium flowing on the outer circular surface of the stator core can pass through the oil passing channels, the cooling medium can flow through the whole outer circular surface of the stator core, the flowing area of the cooling medium is increased, the stator core is cooled, the heat dissipation capacity of the stator core is improved, and the heat dissipation effect of the motor is improved; the bulges are arranged on the outer circular surface of the stator core in a staggered mode, a cooling medium circulation channel can be formed on the outer circular surface of the stator core and is communicated with the oil passage, so that cooling medium flows along the cooling medium circulation channel and the oil passage and flows through the whole outer circular surface of the stator core, the heat dissipation capacity of the middle part of the stator core is improved, the flow of the cooling medium is increased, and the heat dissipation performance of the motor is improved.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (15)
1. The utility model provides a stator core's heat radiation structure which characterized in that: including a plurality of oily passageways of crossing, a plurality of oily passageways of crossing are all located stator core's installation boss, each the both ends of crossing oily passageway respectively with the both sides space intercommunication of installation boss, just it is directional to cross the direction that the coolant of arbitrary end of oily passageway flows the surface of stator core, so that it is a plurality of on the stator core installation boss intercommunication, so that coolant flows through a plurality of on the stator core installation boss flows through wholly the stator core surface.
2. The heat dissipation structure of a stator core according to claim 1, characterized in that: the oil passing channel is arranged on the outer circle surface of the mounting boss close to the stator core.
3. The heat dissipation structure of a stator core according to claim 2, characterized in that: the mounting boss comprises a plurality of mounting lugs, the mounting lugs are coaxially arranged, each mounting lug is arranged on one silicon steel sheet of the stator core, each mounting lug is at least provided with an oil passing hole, and the oil passing holes are sequentially arranged from one side edge to the other side edge of the mounting lug.
4. The heat dissipation structure of a stator core according to claim 3, characterized in that: in a plurality of the mounting lugs forming one oil passing channel, the oil passing holes on two adjacent mounting lugs are arranged in a staggered mode, and one oil passing hole on one mounting lug is communicated with at least one adjacent oil passing hole on the other mounting lug.
5. The heat dissipation structure of a stator core according to claim 4, characterized in that: and at least one oil passing hole which penetrates through one side edge and is communicated with the outside is formed in any one of the two adjacent mounting lugs, so that two ends of the oil passing channel are respectively communicated with two sides of the mounting lugs.
6. The heat dissipation structure of a stator core according to any one of claims 3 to 5, wherein: each silicon steel sheet is provided with a plurality of installation lugs, and is a plurality of installation lugs set gradually along the circumference of silicon steel sheet, and is a plurality of when silicon steel sheet closed assembly each a plurality of the position one-to-one of installation lug of silicon steel sheet constructs a plurality ofly installation boss structure.
7. The heat dissipation structure of a stator core according to claim 6, characterized in that: the stator core comprises a plurality of groups of silicon steel sheets, the silicon steel sheets are coaxially arranged and sequentially stacked along the axis direction of the stator core, each group of silicon steel sheets comprises a plurality of types of silicon steel sheets, and the oil passing holes in the installation lugs are different in arrangement position.
8. The heat dissipation structure of a stator core according to claim 7, characterized in that: each group of silicon steel sheets comprises a silicon steel sheet at least provided with an oil passing hole communicated with any side edge of the installation lug and a silicon steel sheet at the middle part of the installation lug, and when the silicon steel sheets are stacked, the silicon steel sheet provided with the oil passing hole communicated with one side edge of the installation lug, the silicon steel sheet at the middle part of the installation lug and the silicon steel sheet provided with the oil passing hole communicated with the other side edge of the installation lug are sequentially stacked.
9. The heat dissipation structure of a stator core according to claim 6, characterized in that: on each silicon steel sheet of stator core, two adjacent on the installation lug the oil hole that crosses sets up the position inequality, one of them a plurality of on the installation lug include at least one with a side oil hole that crosses that link up mutually, another a plurality of on the installation lug the oil hole that crosses is located the middle part, it is a plurality of when the silicon steel sheet is closed assembly, two adjacent silicon steel sheet rotation an angle closed assembly, the angle is two adjacent angle between the installation lug.
10. The heat dissipation structure of a stator core according to any one of claims 3 to 5 and 7 to 9, wherein: each oil passing channel at least comprises two oil passing holes, and the oil passing holes are communicated in sequence.
11. The heat dissipation structure of a stator core according to claim 10, characterized in that: when the number of the oil passing holes forming each oil passing channel is two, the length of any oil passing hole is larger than half of the width of the mounting lug, so that the two oil passing holes are communicated.
12. The heat dissipation structure of a stator core according to claim 10, characterized in that: when the number of the oil passing holes forming each oil passing channel is three, the oil passing holes respectively communicated with the two side edges of the mounting lug and the oil passing hole positioned in the middle of the mounting lug are included, and the length of the oil passing hole positioned in the middle of the mounting lug is larger than the distance between the two oil passing holes respectively communicated with the two side edges of the mounting lug, so that the three oil passing holes are communicated.
13. The heat dissipation structure of a stator core according to claim 10, characterized in that: when the number of the oil passing holes forming each oil passing channel is more than three, the oil passing holes respectively communicated with the two side edges of the mounting lug, the oil passing holes positioned in the middle of the mounting lug, the oil passing holes communicated with one side edge of the mounting lug, the oil passing holes positioned in the middle of the mounting lug and the oil passing holes communicated with the other side edge of the mounting lug are sequentially communicated.
14. The heat dissipation structure of a stator core according to any one of claims 1 to 5, 7 to 9, and 11 to 13, wherein: the surface of stator core is provided with a plurality of mutual crisscross archs that set up.
15. An electric machine characterized by: a heat dissipating structure comprising the stator core as recited in any one of claims 1 to 14.
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Cited By (1)
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|---|---|---|---|---|
| CN116613907A (en) * | 2023-06-29 | 2023-08-18 | 小米汽车科技有限公司 | Stator core, driving motor and vehicle |
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| CN114374282B (en) | 2022-07-12 |
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Address after: Free House R&D Building, No. 69, West 11th Road, Tianjin Binhai New Area Pilot Free Trade Zone (Airport Economic Zone), 300308 Patentee after: BorgWarner Powertrain (Tianjin) Co.,Ltd. Address before: No.1, Xishi Road, Tianjin Binhai New Area pilot free trade zone (Airport Economic Zone), 300308 Patentee before: Tianjin Songzheng Auto Parts Co.,Ltd. |