CN215897411U - Motor heat radiation structure - Google Patents
Motor heat radiation structure Download PDFInfo
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- CN215897411U CN215897411U CN202122224754.3U CN202122224754U CN215897411U CN 215897411 U CN215897411 U CN 215897411U CN 202122224754 U CN202122224754 U CN 202122224754U CN 215897411 U CN215897411 U CN 215897411U
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Abstract
The utility model belongs to the field of motor heat dissipation, and particularly relates to a motor heat dissipation structure which comprises a rotor, a hollow rotating shaft and two oil guide plates, wherein the oil guide plates are respectively tightly attached to the side surface of the rotor and the circumferential surface of the hollow rotating shaft, oil outlet holes are arranged on the oil guide plates in a penetrating manner, an oil guide groove connected with an inner ring of the oil guide plate is arranged on one side close to the rotor, a cooling hole is arranged on the rotor, two ends of the cooling hole respectively correspond to the oil guide grooves and the oil outlet holes of the two oil guide plates, and an oil inlet hole communicated with the oil guide grooves is arranged on the hollow rotating shaft. Direct cooling of the hot spot is achieved.
Description
Technical Field
The utility model belongs to the field of motor heat dissipation, and particularly relates to a motor heat dissipation structure.
Background
With the requirement of new energy vehicles on the power density of a driving system becoming higher and higher, the heat dissipation of a motor faces great challenges, the insulation life is reduced due to overhigh temperature, and the performance of a permanent magnet is affected and even demagnetization occurs. At present, the heat dissipation inside the motor and the heat dissipation inside the motor by providing cooling oil through a hollow rotating shaft are realized, but how to reasonably and preferentially dissipate the heat of a rotor permanent magnet part and a stator winding part is still a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a motor heat dissipation structure capable of dissipating heat of a rotor and a stator accurately and preferentially.
The utility model comprises a rotor, a hollow rotating shaft matched with the rotor and two oil guide plates arranged on two end faces of the rotor, wherein the oil guide plates are respectively tightly attached to the side face of the rotor and the circumferential surface of the hollow rotating shaft, oil outlet holes are arranged on the oil guide plates in a penetrating manner, an oil guide groove connected with an inner ring of the oil guide plate is arranged on one side close to the rotor, cooling holes are arranged on the rotor in a penetrating manner, two ends of each cooling hole respectively correspond to the oil guide grooves and the oil outlet holes of the two oil guide plates, and an oil inlet hole communicated with the oil guide grooves is arranged on the hollow rotating shaft.
Furthermore, the cooling holes are provided with more than two, and the oil guide grooves and the oil outlet holes on the same side of the two cooling holes are arranged in a staggered mode.
Furthermore, the cooling hole is that the annular array is provided with eight, leads the oil groove on the oil deflector and respectively is provided with four with the oil outlet, and leads oil groove and oil outlet and be the annular array and set up in turn.
Furthermore, an oil collecting groove is formed in one side, close to the hollow rotating shaft, of the oil guide plate and is used for communicating the oil inlet hole with the oil guide grooves.
Furthermore, one side of the oil guide plate, which is far away from the hollow rotating shaft, is bent to be provided with a guide bevel edge, and the cooling oil is sprayed to the stator from the oil outlet spray opening along the guide bevel edge.
Furthermore, one side of the oil guide plate, which is close to the hollow rotating shaft, is provided with a mounting ring matched with the hollow rotating shaft.
Furthermore, a plurality of balance holes are formed in the positions, outside the oil guide plate, of the two end faces of the rotor in an annular array mode, and balance blocks are arranged in the balance holes as required.
The utility model also comprises a shell and an end cover, wherein two ends of the hollow rotating shaft are rotationally connected with the end cover and the shell through a first bearing, an oil guide pipe extending into the hollow rotating shaft is arranged at the axis position of the end cover, the oil guide pipe is connected with the inner wall of the hollow rotating shaft through a second bearing, and the shaft voltage of the hollow rotating shaft is grounded through the second bearing, the oil guide pipe and the end cover.
The oil guide shaft is characterized by further comprising a machine shell and an end cover, an oil guide pipe extending into the hollow rotating shaft is arranged at the axis position of the end cover, an oil inlet communicated with the oil guide pipe is further formed in the end cover, and an oil outlet is formed in the bottom of the machine shell.
The utility model also comprises a machine shell and an end cover, wherein a cooling channel is arranged on the machine shell in a surrounding manner, and a water inlet and a water outlet are arranged at one section of the cooling channel.
The utility model has the advantages that the cooling oil enters the oil guide grooves of the oil guide plates through the oil inlet holes of the hollow rotating shaft and moves to the oil outlet holes of the oil guide plates on the other side along the cooling holes of the rotor in a single direction to be sprayed into the motor, the heat dissipation of the area near the rotor permanent magnet of the motor can be effectively carried out, the loss magnetic risk of the permanent magnet is reduced, the cooling oil is directly sprayed to the end part of the stator winding in the motor through the oil outlet holes after the heat dissipation of the interior of the rotor is carried out, the direct cooling of a hot point is realized, the heat dissipation efficiency of the winding is improved, the service life and the reliability of the motor are finally improved, in addition, the cooling heat dissipation of the motor bearing can be carried out after the heat dissipation of the stator winding, the cooling effect of the interior of the motor is greatly ensured, wherein two ends of the same cooling hole respectively correspond to the oil guide grooves and the oil outlet holes of the two oil guide plates, namely the flow direction of the cooling oil in the same cooling hole is consistent, the flow efficiency and the speed are effectively improved, in addition, the oil guide plate is tightly attached to the rotor and the hollow rotating shaft at the same time, and the rotor is limited to a certain extent.
Drawings
FIG. 1 is a sectional view taken along line A-A of the present invention;
FIG. 2 is a cross-sectional view taken along line B-B of the present invention;
FIG. 3 is a cross-sectional view taken along line C-C of the present invention;
FIG. 4 is a cross-sectional view taken along line D-D of the present invention;
FIG. 5 is a front view of the oil deflection plate of the present invention;
FIG. 6 is a schematic view of a first angular configuration of an oil deflection plate according to the present invention;
FIG. 7 is a second angular configuration of the oil deflection plate of the present invention;
FIG. 8 is a schematic structural view of an oil guide pipe according to the present invention;
FIG. 9 is a front view of the rotor of the present invention;
FIG. 10 is a cross-sectional view taken along line B-B of the present invention;
FIG. 11 is a schematic structural view of a hollow shaft according to the present invention.
In the figure, 1-stator; 2-a balance weight; 3, bearing one; 4, bearing II; 5-oil guide pipe; 51-oil outlet holes; 52-mounting a step; 53-a threaded portion; 54-a guide step; 6-end cover; 61-an oil inlet; 7-oil guide plate; 71-an oil sump; 72-oil guide groove; 73-oil outlet; 74-a guided bevel; 75-a mounting ring; 8-a hollow rotating shaft; 81-oil inlet hole; 9-a rotor; 91-cooling holes; 92-balance holes; 93-a permanent magnet; 94-pouring sealant; 95-permanent magnet placement grooves; 10-a housing; 101-an oil outlet; 102-a water inlet; 103-a water outlet; 104-cooling channels.
Detailed Description
As shown in fig. 1-11, the present invention comprises a rotor 9, a hollow rotating shaft 8 matching with the rotor 9, and two oil guide plates 7 arranged on two end faces of the rotor 9, the oil guide plate 7 is respectively tightly attached to the side surface of the rotor 9 and the circumferential surface of the hollow rotating shaft 8, an oil outlet 73 is arranged on the oil guide plate 7 in a penetrating way, an oil guide groove 72 connected with the inner ring of the oil guide plate 7 is arranged on one side of the oil guide plate 7 close to the rotor 9, cooling holes 91 are arranged on two penetrating end surfaces of the rotor 9, as shown in fig. 9, the cooling hole 91 is disposed near a permanent magnet placement groove 95 for installing the permanent magnet 93, the permanent magnet 93 is fixedly disposed in the permanent magnet placement groove through a potting adhesive 94, a cooling medium flows through the cooling hole 91 to effectively dissipate heat of the permanent magnet 93, two ends of the cooling hole 91 respectively correspond to the oil guide grooves 72 and the oil outlet 73 of the two oil guide plates 7, and the hollow rotating shaft 8 is provided with an oil inlet 81 communicating with the oil guide grooves 72.
The cooling oil enters the oil guide grooves 72 of the oil guide plates 7 through the oil inlet holes 81 of the hollow rotating shafts 8 and moves to the oil outlet holes 73 of the oil guide plates 7 on the other side along the cooling holes 91 of the rotors 9 in a single direction to be sprayed into the motor, so that the heat dissipation of the areas near the permanent magnets 93 of the rotors 9 of the motor can be effectively carried out, the loss magnetic risk of the permanent magnets 93 is reduced, the cooling oil is directly sprayed to the end parts of the stator windings in the motor through the oil outlet holes 73 after the heat dissipation of the interiors of the rotors 9, the direct cooling of hot spots is realized, the heat dissipation efficiency of the windings is improved, the service life and the reliability of the motor are finally improved, in addition, the cooling heat dissipation of the motor bearing I3 can be carried out after the heat dissipation of the stator windings, the cooling effect in the motor is greatly ensured, wherein two ends of the same cooling hole 91 respectively correspond to the oil guide grooves 72 and the oil outlet holes 73 of the two oil guide plates 7, namely the flow direction of the cooling oil in the same cooling hole 91 is consistent, effectively improve flow efficiency and speed, and then improve the radiating effect, lead oiled-plate 7 in addition and closely laminate with rotor 9 and hollow rotating shaft 8 simultaneously, carry out limiting displacement to rotor 9 to a certain extent.
The cooling holes 91 are provided with more than two, the oil guide grooves 72 and the oil outlet holes 73 on the same side of the two cooling holes 91 are arranged in a staggered manner, and by arranging the plurality of cooling holes 91 and enabling the flow directions of cooling oil in the groups of cooling holes 91 to be opposite, cooling oil is sprayed out from the oil outlet holes 73 of the oil guide plate 7 on both sides of the rotor 9, so that the balance of cooling effects of parts on both sides inside the motor is ensured, in the preferred mode of the utility model, as shown in fig. 5-7, the eight cooling holes 91 are arranged in an annular array manner, the four oil guide grooves 72 and the four oil outlet holes 73 are respectively arranged on the oil guide plate 7, the four oil guide grooves 72 are arranged in an adjacent manner at 90 degrees, the four oil outlet holes 73 are arranged in an adjacent manner at 90 degrees, the two adjacent oil guide grooves 72 and oil outlet holes 73 are arranged in a 45 degrees manner, namely, the oil guide grooves 72 and the oil outlet holes 73 are alternately arranged in an annular array manner, in the embodiment, the two oil guide plates 7 on both end faces of the rotor 9 are arranged in a staggered manner at 45 degrees, the two end faces of the rotor 9 are respectively provided with four oil outlet holes 73 which are arranged in a 90-degree crossed manner to spray cooling oil, so that the cooling effect and efficiency of the rotor 9 and the inside of the motor are greatly improved, and the cooling balance is ensured.
Lead oiled plate 7 and be close to hollow rotating shaft 8 one side and be provided with oil trap 71, oil trap 71 is used for communicateing inlet port 81 and a plurality of oil trap 72 of leading, lead a plurality of oil trap 72 and inlet port 81 through an oil trap 71 intercommunication, can lead oiled plate 7 to only set up an inlet port 81 and can carry out the fuel feeding for a plurality of oil trap 72 of leading on hollow rotating shaft 8, very big assurance hollow rotating shaft 8's structural strength, reduce and change the hole on hollow rotating shaft 8, this embodiment oil trap 71 for lead the oiled plate 7 and be close to the angle limit of hollow rotating shaft 8 and rotor 9 one side and carry out chamfer or fillet, the cell body of hollow rotating shaft 8 periphery and rotor 9 terminal surface formation oil trap 71, simplified the structural complexity of leading oiled plate 7.
One side of the oil guide plate 7, which is far away from the hollow rotating shaft 8, is bent to be provided with a guide bevel edge 74, and by arranging the guide bevel edge 74, cooling oil is sprayed to the winding part of the stator 1 from the oil outlet 73 along the guide bevel edge 74, so that the purpose of cooling the winding end part of the stator is achieved.
Lead that oil board 7 is close to 8 one sides of hollow rotating shaft and is provided with the collar 75 with 8 complex of hollow rotating shaft, in this embodiment, lead oil board 7 through collar 75 and 8 interference fit of hollow rotating shaft, connect simply reliably.
The two end faces of the rotor 9 are located outside the oil guide plate 7 and are provided with a plurality of balance holes 92 in an annular array, and balance blocks 2 are arranged in the balance holes 92 according to needs.
As shown in fig. 10, the present invention further includes a housing 10 and an end cover 6, two ends of the hollow rotating shaft 8 are rotatably connected to the end cover 6 and the housing 10 through a first bearing 3, an oil conduit 5 extending into the hollow rotating shaft 8 is disposed at an axial position of the end cover 6, the oil conduit 5 is connected to an inner wall of the hollow rotating shaft 8 through a second bearing 4, a shaft voltage of the hollow rotating shaft 8 is grounded through the second bearing 4, the oil conduit 5 and the end cover 6, specifically, the second bearing 4 is a bearing lubricated by conductive grease, so as to improve a conductive effect.
The oil guide pipe 5 is provided with an oil outlet hole 51 inside the hollow rotating shaft 8, the other end of the oil guide pipe is provided with a threaded part 53 which is in threaded connection with the end cover 6 and is directly communicated with an oil inlet 61 on the end cover 6, and in addition, the oil guide pipe 5 is also provided with an installation step 52 for positioning and a guide step 54 for installing the bearing II 4, so that the installation difficulty is simplified.
The oil-feeding device also comprises a shell 10 and an end cover 6, wherein an oil guide pipe 5 extending into the hollow rotating shaft 8 is arranged at the axis position of the end cover 6, an oil inlet 61 communicated with the oil guide pipe 5 is also arranged on the end cover 6, and an oil outlet 101 is arranged at the bottom of the shell 10.
The utility model also comprises a machine shell 10 and an end cover 6, wherein a cooling channel 104 is arranged on the machine shell 10 in a surrounding manner, and a water inlet 102 and a water outlet 103 are arranged on one section of the cooling channel 104.
The specific working principle of the utility model is as follows:
an oil cooling loop: the cooling oil preferably enters the oil guide pipe 5 through the oil inlet 61 of the end cover 6, and enters the inner cavity of the hollow rotating shaft 8 from the oil outlet hole 51 at the end of the oil guide pipe 5, when the motor works, the cooling oil enters the oil collecting groove 71 of the oil guide plate 7 from the oil inlet hole 81 arranged in the radial direction along the inner wall of the hollow rotating shaft 8 under the action of centrifugal force, enters the plurality of oil guide grooves 72 under the action of centrifugal force, then enters the cooling hole 91 of the rotor 9, flows out from the oil outlet hole 73 of the oil guide plate 7 at the other end, and flows to the winding part at the end of the stator 1 along the inclined guide edge 74 through centrifugal force, so as to achieve the purpose of cooling the permanent magnet 93 inside the rotor 9 and the winding end of the stator 1, as shown in fig. 1, the cooling oil entering the oil inlet hole 81 at the right side of the hollow rotating shaft 8 enters the plurality of cooling holes 91 through the oil collecting groove 71 and the oil guide groove 72 of the oil guide plate 7 at the right side, and is discharged to the winding end of the stator 1 at the oil guide plate 7 at the left side from the oil outlet hole 73, as shown in fig. 2, the cooling oil entering the oil inlet 81 on the left side of the hollow rotating shaft 8 enters the plurality of cooling holes 91 through the oil collecting groove 71 and the oil guiding groove 72 of the left oil guiding plate 7 and is discharged from the oil outlet 73 of the right oil guiding plate 7 to the winding head of the right stator 1, so that the winding head of the stator 1 and the two ends inside the motor are cooled in a balanced manner.
A water cooling loop: the cooling liquid enters the cooling channel 104 through the water inlet 102 on the machine shell 10, circles around the cooling channel 104, and then flows out of the water outlet 103 and enters the circulating system for circulation.
Claims (10)
1. The utility model provides a motor heat radiation structure, characterized by, include rotor (9), lead oiled-plate (7) with rotor (9) complex hollow rotating shaft (8) and two of setting at rotor (9) both ends face, lead oiled-plate (7) closely laminate with rotor (9) side and hollow rotating shaft (8) periphery respectively, it is provided with oil outlet (73) to run through on oiled-plate (7), is close to rotor (9) one side and sets up oil groove (72) of leading of connecting oil plate (7) inner ring, it is provided with cooling hole (91) to run through both ends face on rotor (9), and the both ends of cooling hole (91) correspond with oil groove (72) and oil outlet (73) of leading of two oil plates (7) respectively, be provided with oil inlet (81) that the intercommunication led oil groove (72) on hollow rotating shaft (8).
2. The heat dissipation structure of an electric motor according to claim 1, wherein the cooling holes (91) are provided with more than two, and the oil guide grooves (72) and the oil outlet holes (73) on the same side of the more than two cooling holes (91) are arranged in a staggered manner.
3. The heat dissipation structure of an electric motor according to claim 2, wherein the number of the cooling holes (91) is eight in a circular array, the number of the oil guide grooves (72) and the number of the oil outlet holes (73) on the oil guide plate (7) are four, and the oil guide grooves (72) and the oil outlet holes (73) are alternately arranged in a circular array.
4. The heat dissipation structure of the motor as claimed in claim 2, wherein an oil collection groove (71) is formed in one side of the oil guide plate (7) close to the hollow rotating shaft (8), and the oil collection groove (71) is used for communicating the oil inlet hole (81) with the plurality of oil guide grooves (72).
5. The heat dissipation structure of the motor as claimed in claim 1, wherein the oil guide plate (7) is bent to form a beveled guide edge (74) on a side away from the hollow rotating shaft (8), and the cooling oil is sprayed from the oil outlet (73) to the stator (1) along the beveled guide edge (74).
6. The heat dissipation structure of the motor as claimed in claim 1, wherein a mounting ring (75) engaged with the hollow rotating shaft (8) is disposed on one side of the oil guide plate (7) close to the hollow rotating shaft (8).
7. The motor heat dissipation structure as defined in any one of claims 1 to 6, wherein a plurality of balancing holes (92) are formed in an annular array at positions on both end surfaces of the rotor (9) outside the oil guide plate (7), and the balancing blocks (2) are disposed in the balancing holes (92) as required.
8. The motor heat dissipation structure of any one of claims 1 to 6, further comprising a housing (10) and an end cover (6), wherein two ends of the hollow rotating shaft (8) are rotatably connected with the end cover (6) and the housing (10) through a first bearing (3), an oil guide pipe (5) extending into the hollow rotating shaft (8) is arranged at the axis position of the end cover (6), the oil guide pipe (5) is connected with the inner wall of the hollow rotating shaft (8) through a second bearing (4), and the shaft voltage of the hollow rotating shaft (8) is grounded through the second bearing (4), the oil guide pipe (5) and the end cover (6).
9. The motor heat dissipation structure of any one of claims 1 to 6, further comprising a housing (10) and an end cover (6), wherein an oil conduit (5) extending into the hollow rotating shaft (8) is disposed at an axial position of the end cover (6), an oil inlet (61) communicated with the oil conduit (5) is further disposed on the end cover (6), and an oil outlet (101) is disposed at the bottom of the housing (10).
10. The motor heat dissipation structure of any one of claims 1 to 6, further comprising a casing (10) and an end cover (6), wherein a cooling channel (104) is circumferentially arranged on the casing (10), and a water inlet (102) and a water outlet (103) are arranged on one section of the cooling channel (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122224754.3U CN215897411U (en) | 2021-09-14 | 2021-09-14 | Motor heat radiation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122224754.3U CN215897411U (en) | 2021-09-14 | 2021-09-14 | Motor heat radiation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215897411U true CN215897411U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122224754.3U Active CN215897411U (en) | 2021-09-14 | 2021-09-14 | Motor heat radiation structure |
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| Country | Link |
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| CN (1) | CN215897411U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115967208A (en) * | 2023-03-16 | 2023-04-14 | 四川宜宾力源电机有限公司 | New energy automobile hybrid cooling formula motor |
| WO2023198385A1 (en) * | 2022-04-13 | 2023-10-19 | Bayerische Motoren Werke Aktiengesellschaft | Cooling-fluid-guiding rotor shaft for a rotor of an electric machine with impact wall |
| EP4465496A1 (en) * | 2023-05-17 | 2024-11-20 | Xiaomi EV Technology Co., Ltd. | Balancing disk for motor, rotor assembly, motor and vehicle |
-
2021
- 2021-09-14 CN CN202122224754.3U patent/CN215897411U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023198385A1 (en) * | 2022-04-13 | 2023-10-19 | Bayerische Motoren Werke Aktiengesellschaft | Cooling-fluid-guiding rotor shaft for a rotor of an electric machine with impact wall |
| CN115967208A (en) * | 2023-03-16 | 2023-04-14 | 四川宜宾力源电机有限公司 | New energy automobile hybrid cooling formula motor |
| EP4465496A1 (en) * | 2023-05-17 | 2024-11-20 | Xiaomi EV Technology Co., Ltd. | Balancing disk for motor, rotor assembly, motor and vehicle |
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