CN211508741U - Inner stator cooling device, inner stator assembly and motor - Google Patents
Inner stator cooling device, inner stator assembly and motor Download PDFInfo
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- CN211508741U CN211508741U CN201922343340.5U CN201922343340U CN211508741U CN 211508741 U CN211508741 U CN 211508741U CN 201922343340 U CN201922343340 U CN 201922343340U CN 211508741 U CN211508741 U CN 211508741U
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Abstract
The utility model discloses an inner stator cooling device, inner stator subassembly and motor, an inner stator cooling device, include: the rotating shaft is divided into a first end part, a middle part and a second end part along the axial direction of the rotating shaft, the diameter of the middle part is larger than that of the first end part and that of the second end part, the first end part is provided with a liquid inlet, and the second end part is provided with a liquid outlet; the water channel shell is sleeved in the middle part, the outer peripheral surface of the water channel shell is suitable for being fixedly connected with the stator, a water channel is defined between the inner peripheral surface of the water channel shell and the outer peripheral surface of the middle part, and the water channel is communicated with the liquid inlet and the liquid outlet. According to the utility model discloses inner stator cooling device has advantages such as cooling efficiency height, simple structure, structural strength height.
Description
Technical Field
The utility model belongs to the technical field of the motor technique and specifically relates to a relate to an inner stator cooling device, have inner stator cooling device's inner stator subassembly and have inner stator subassembly's motor.
Background
The loss of the motor comprises copper loss, iron loss, stray loss and the like, wherein the copper loss and most of the iron loss are positioned at the side of the stator, so that the heat dissipation area of the inner stator is smaller than that of the outer stator structure for the motor with the inner stator structure, the heat in the motor is not easy to dissipate, the heat in the motor is gathered, and the temperature rise of the motor is too high and even the motor is burnt.
As shown in fig. 1, a stator assembly of the cooling device 100 ' of an internal stator motor in the related art mainly includes a first support 1 ', a connecting shaft 2 ', and a mounting seat 3, and a specific cooling manner is that a cooling liquid enters a sealed cavity 5 ' through a liquid inlet of the connecting shaft 2 ' and a liquid inlet pipe 21 ', and flows out from a liquid outlet pipe 22 ' at an upper end through a liquid outlet of the connecting shaft 2 ' after the sealed cavity 5 ' is filled with the cooling liquid. However, in the cooling device 100 ', the liquid inlet and the liquid outlet on the connecting shaft 2 ' are disposed at the same end, so that the apertures of the liquid inlet and the liquid outlet are limited, the flow resistance is easily increased, the cooling liquid is blocked, the cooling efficiency is affected, the space of the sealing cavity 5 ' is large, the overall structural strength is affected, the heat exchange area between the cooling liquid and the stator core is not increased, and the space of the sealing cavity 5 ' is large, so that the liquid inlet pipe 21 ' and the liquid outlet pipe 22 ' are required to be disposed in order to smoothly guide the cooling liquid into and out of the sealing cavity 5 ', so that more parts are required, and the structure is complicated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide an inner stator cooling device, which has the advantages of high cooling efficiency, simple structure, high structural strength, etc.
The utility model discloses still provide an interior stator subassembly that has above-mentioned interior stator cooling device.
The utility model discloses still provide one kind and have the motor of inner stator subassembly.
To achieve the above object, according to an embodiment of the first aspect of the present invention, there is provided an inner stator cooling device, including: the rotating shaft is divided into a first end part, a middle part and a second end part along the axial direction of the rotating shaft, the diameter of the middle part is larger than that of the first end part and that of the second end part, the first end part is provided with a liquid inlet, and the second end part is provided with a liquid outlet; the water channel shell is sleeved in the middle part, the outer peripheral surface of the water channel shell is suitable for being fixedly connected with the stator, a water channel is defined between the inner peripheral surface of the water channel shell and the outer peripheral surface of the middle part, and the water channel is communicated with the liquid inlet and the liquid outlet.
According to the utility model discloses inner stator cooling device has advantages such as cooling efficiency height, simple structure, structural strength height.
According to some embodiments of the utility model, feed liquor channel and liquid outlet channel have been constructed in the pivot, the water course passes through feed liquor channel with the inlet intercommunication, the water course passes through liquid outlet channel with the liquid outlet intercommunication.
Further, the liquid inlet channel comprises a liquid inlet main path and a plurality of liquid inlet branch paths, the liquid inlet main path extends to the middle part along the axial direction of the first end part, the plurality of liquid inlet branch paths are formed in the middle part and are communicated with the liquid inlet main path, each liquid inlet branch path extends along the radial direction of the middle part, and the plurality of liquid inlet branch paths are arranged at intervals along the circumferential direction of the middle part; the liquid outlet channel comprises a liquid outlet main path and a plurality of liquid outlet branch paths, the liquid outlet main path extends to the middle part along the axial direction of the second end part, the liquid outlet branch paths are formed in the middle part and are communicated with the liquid outlet main path, each liquid outlet branch path extends along the radial direction of the middle part, and the liquid outlet branch paths are arranged along the circumferential direction of the middle part at intervals.
Further, the intermediate portion is configured with a plurality of lightening holes, each lightening hole penetrates through the intermediate portion in the axial direction of the intermediate portion, the plurality of lightening holes are arranged at intervals in the circumferential direction of the intermediate portion, and each lightening hole is located between adjacent liquid inlet branches and between adjacent liquid outlet branches in the circumferential direction of the intermediate portion.
According to some embodiments of the invention, a water guide rib is provided on at least one of the inner peripheral surface of the water channel shell and the outer peripheral surface of the intermediate portion, the water guide rib being located in the water channel to define a shape of the water channel.
Further, the flow guiding ribs define the water channel into a U-shape, an S-shape or a spiral shape.
Further, in the inner stator cooling device, the number of the water passages is plural, each of the water passages is communicated in an axial direction of the middle portion, and the plural water passages are arranged in a circumferential direction of the middle portion.
According to some embodiments of the invention, the inner stator cooling device, the one end of water course shell have end wall and the other end open, the end wall backstop in the one end of intermediate part, the other end of intermediate part is constructed with the shaft shoulder, the shaft shoulder backstop the open one end of water course shell with the one end of stator, the back of end wall one side of intermediate part is equipped with the retaining ring, the retaining ring backstop the end wall with the other end of stator.
According to some embodiments of the invention, the one end of the water course shell has an end wall and the other end is open, the end wall backstop in the one end of intermediate part, the other end of intermediate part is constructed with the shaft shoulder, the shaft shoulder backstop the open one end of water course shell with the one end of stator, the shaft shoulder with the open one end welding of water course shell, the end wall with the second end welding.
According to the utility model discloses an embodiment of second aspect provides an interior stator subassembly, interior electronic component includes:
the inner stator cooling device according to the embodiment of the first aspect of the present invention; the stator is sleeved on the outer peripheral surface of the water channel shell.
According to the utility model discloses the inner stator subassembly, through utilizing according to the utility model discloses an embodiment of first aspect the inner stator cooling device, have advantages such as cooling efficiency height, simple structure, structural strength height.
According to the utility model discloses an embodiment of third aspect proposes a motor, the motor includes: an inner stator assembly according to an embodiment of the second aspect of the invention; a rotor rotatably surrounding an outer side of the stator.
According to the utility model discloses motor, through utilizing according to the utility model discloses an embodiment of second aspect the inner stator subassembly have advantages such as cooling efficiency height, simple structure, structural strength height.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a sectional view of a cooling apparatus of an inner stator of the related art.
Fig. 2 is a cross-sectional view of an electric machine according to an embodiment of the invention.
Figure 3 is a cross-sectional view of an inner stator assembly according to an embodiment of the present invention.
Fig. 4 is a schematic view of a rotating shaft structure of an inner stator cooling device according to an embodiment of the present invention.
Fig. 5 is a schematic view of a waterway shell structure of an inner stator assembly according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a motor with a stator cooling device according to an embodiment of the present invention.
Fig. 7 is a schematic view of a rotating shaft structure of an inner stator cooling device according to an embodiment of the present invention.
Fig. 8 is a sectional view of an inner stator cooling device according to an embodiment of the present invention.
Reference numerals:
the prior art is as follows:
the inner stator cooling device 100 ', the first support 1 ', the connecting shaft 2 ', the mounting seat 3 ', the sealing cavity 5 ', the liquid inlet pipe 21 ' and the liquid outlet pipe 22 ';
the utility model discloses:
inner stator cooling device 100, inner stator assembly 200, motor 300,
The liquid inlet structure comprises a rotating shaft 1, a first end part 11, a liquid inlet 111, a liquid inlet channel 112, a liquid inlet main path 1121, a liquid inlet branch 1122, a second end part 12, a liquid outlet 121, a liquid outlet channel 122, a liquid outlet main path 1221, a liquid outlet branch 1222, a middle part 13, a flow guide rib 131, a lightening hole 14, a shaft shoulder 15, a liquid outlet main path 111, a liquid outlet main path,
A water channel shell 2, a water channel 20, an end wall 21, a retainer ring 211,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "a plurality" means two or more, and "a plurality" means one or more.
An inner stator cooling device 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 2 to 8, an inner stator cooling device 100 according to an embodiment of the present invention includes a rotation shaft 1 and a waterway housing 2.
The rotating shaft 1 is divided into a first end part 11, a middle part 13 and a second end part 12 along the axial direction of the rotating shaft, the diameter of the middle part 13 is larger than that of the first end part 11 and that of the second end part 12, the first end part 11 is provided with a liquid inlet 111, and the second end part 12 is provided with a liquid outlet 121. The water channel shell 2 is sleeved on the middle part 13, the outer peripheral surface of the water channel shell 2 is suitable for being fixedly connected with the stator 3, a water channel 20 is defined between the inner peripheral surface of the water channel shell 2 and the outer peripheral surface of the middle part 13, and the water channel 20 is communicated with the liquid inlet 111 and the liquid outlet 121.
For example, the rotating shaft 1 may be divided into three sections along the axial direction thereof, that is, a first end portion 11, an intermediate portion 13 and a second end portion 12, the intermediate portion 13 is connected between the first end portion 11 and the second end portion 12, the first end portion 11, the intermediate portion 13 and the second end portion 12 may be integrally formed, a central axis of the first end portion 11, a central axis of the intermediate portion 13 and a central axis of the second end portion 12 coincide with each other, a diameter of the first end portion 11 and a diameter of the second end portion 12 may be equal or unequal, and a diameter of the intermediate portion 13 is greater than a diameter of each of the first end portion 11 and the second end portion. The cooling liquid flows in from the liquid inlet 111 of the first end portion 11, enters the water channel 20 between the middle portion 13 and the water channel shell 2, exchanges heat with the stator 3, carries away heat of the stator 3, and then flows out from the liquid outlet 121 of the second end portion 12.
According to the utility model discloses inner stator cooling device 100, through setting up inlet 111 at first end 11, and set up liquid outlet 121 at second end 12, set up inlet 111 and liquid outlet 121 respectively at the both ends of pivot 1 from this, reduced the restriction that the bore of inlet 111 and liquid outlet 121 received, liquid outlet 121 and inlet 111 can set up the bore that is enough big to the smooth and easy circulation of coolant liquid of being convenient for has avoided the coolant liquid to block, thereby has improved cooling efficiency.
And, the pivot 1 has set up the great intermediate part 13 of diameter, utilizes intermediate part 13 and water course shell 2 to inject water course 20, under the condition that does not reduce heat transfer area, has reduced the space of water course 20 like this, so, has not only increased overall structure intensity, need not to set up structures such as feed liquor pipe 21 'and drain pipe 22', utilizes intermediate part 13 alright realize the transport to the coolant liquid moreover, and then has reduced the part quantity, has simplified the structure to the production technology has been simplified.
Therefore, the inner stator cooling device 100 according to the embodiment of the present invention has the advantages of high cooling efficiency, simple structure, high structural strength, etc.
In some embodiments of the present invention, as shown in fig. 2 and fig. 3, a liquid inlet channel 112 and a liquid outlet channel 122 are configured in the rotating shaft 1, the water channel 20 is communicated with the liquid inlet 111 through the liquid inlet channel 112, and the water channel 20 is communicated with the liquid outlet 121 through the liquid outlet channel 122, so that the liquid inlet channel 112 and the liquid outlet channel 122 are opened by the intermediate portion 13, the cooling liquid flowing from the liquid inlet 111 can be conveyed to the water channel 20, and the cooling liquid in the water channel 20 is conveyed to the liquid outlet 121 and flows out.
Specifically, as shown in fig. 2 and 3, the liquid inlet channel 112 includes a liquid inlet main path 1121 and a plurality of liquid inlet branch paths 1122. The main liquid inlet path 1121 extends to the intermediate portion 13 along the axial direction of the first end portion 11, the liquid inlet branches 1122 are formed in the intermediate portion 13 and are communicated with the main liquid inlet path 1121, each liquid inlet branch 1122 extends along the radial direction of the intermediate portion 13, and the plurality of liquid inlet branches 1122 are arranged at intervals along the circumferential direction of the intermediate portion 13.
The liquid outlet passage 122 comprises a main liquid outlet passage 1221 and a plurality of liquid outlet branches 1222. The liquid outlet main path 1221 extends to the intermediate portion 13 in the axial direction of the second end portion 12, the plurality of liquid outlet branches 1222 are formed in the intermediate portion 13 and communicate with the liquid outlet main path 1221, the plurality of liquid outlet branches 1222 extend in the radial direction of the intermediate portion 13, and the plurality of liquid outlet branches 1222 are arranged at intervals in the circumferential direction of the intermediate portion 13.
More specifically, the central axis of the main liquid inlet path 1121 coincides with the central axis of the first end portion 11, one end of the main liquid inlet path 1121 is communicated with the liquid inlet 111, the other end of the main liquid inlet path 1121 extends into the middle portion 13 and is communicated with the plurality of liquid inlet branches 1122, the plurality of liquid inlet branches 1122 are communicated with the peripheral wall of the main liquid inlet path 1121, each liquid inlet branch 1122 extends in the radial direction of the middle portion 13 and penetrates through the outer peripheral surface of the middle portion 13, the plurality of liquid inlet branches 1122 are arranged at equal intervals in the circumferential direction of the middle portion 13 and are adjacent to one end of the middle portion 13 connected with the first end portion 11, and the coolant in the main liquid inlet path 1121 can be uniformly distributed to the water channel 20.
The central axis of the main liquid outlet path 1221 coincides with the central axis of the second end portion 12, one end of the main liquid outlet path 1221 communicates with the liquid outlet port 121, the other end of the main liquid outlet path 1221 extends into the middle portion 13 to communicate with the plurality of liquid outlet branches 1222, the plurality of liquid outlet branches 1222 communicate with the peripheral wall of the main liquid outlet path 1221, each liquid outlet branch 1222 extends in the radial direction of the middle portion 13 and penetrates through the outer peripheral surface of the middle portion 13, the plurality of liquid outlet branches 1222 are arranged at equal intervals in the circumferential direction of the middle portion 13 and are adjacent to one end of the middle portion 13 connected with the second end portion 12, and the cooling liquid in the water channel 20 can be uniformly converged to the main liquid outlet path 1221 through the.
From this, can make in coolant liquid evenly distributed to water course 20 to evenly cool off stator 3 in stator 3's circumference, avoid stator 3's the difference in temperature too big, prevent that local temperature is too high.
The diameters and lengths of the main liquid inlet path 1121 and the main liquid outlet path 1221 may be respectively equal, the diameters and lengths of each liquid inlet branch 1122 and each liquid outlet branch 1222 may be respectively equal, and the number of the liquid inlet branches 1122 may be equal to the number of the liquid outlet branches 1222.
In some embodiments of the present invention, as shown in fig. 4, the middle portion 13 is configured with a plurality of lightening holes 14, each lightening hole 14 penetrates through the middle portion 13 along an axial direction of the middle portion 13, the plurality of lightening holes 14 are arranged at intervals, for example, at equal intervals, along a circumferential direction of the middle portion 13, and each lightening hole 14 is located between adjacent inlet branch 1122 and between adjacent outlet branch 1222 in the circumferential direction of the middle portion 13. The cross-sectional shape of the lightening holes 14 may be arranged according to the actual situation, for example substantially sector-shaped as shown in the figures. Thus, the weight and material consumption of the intermediate portion 13 can be reduced, and the weight-reducing holes 14 are provided so as to avoid the liquid inlet branch 1122 and the liquid outlet branch 1222, thereby not affecting the conveyance of the coolant. In addition, the lightening holes 14 penetrate axially along the middle part 13, so that the machining is convenient.
In some embodiments of the present invention, as shown in fig. 4 and 5, at least one of the inner circumferential surface of the waterway shell 2 and the outer circumferential surface of the middle portion 13 is provided with a flow guide rib 131, and the flow guide rib 131 is located in the waterway 20 to define the shape of the waterway 20.
Specifically, fig. 4 shows an example in which the air guide ribs 131 are provided on the outer peripheral surface of the intermediate portion 13, and fig. 5 shows an example in which the air guide ribs 131 are provided on the inner peripheral surface of the waterway shell 2, but it is needless to say that the air guide ribs 131 may be provided on both the outer peripheral surface of the intermediate portion 13 and the inner peripheral surface of the waterway shell 2.
Alternatively, the flow guide ribs 131 define the water passage 20 in a U shape, an S shape, or a spiral shape, and fig. 4 and 7 show examples of the S shape, but the present invention is not limited thereto as long as the space of the water passage 20 is efficiently utilized.
Therefore, the cooling liquid in the water channel 20 can fully exchange heat with the stator 3, the cooling liquid fully absorbs the heat of the stator 3, and the cooling effect is improved.
Further, for the rotating shaft 1 having a large diameter, as shown in fig. 4, the water passage 20 is plural, each water passage 20 is communicated in the axial direction of the intermediate portion 13, and the plural water passages 20 are arranged in the circumferential direction of the intermediate portion 13. Each water channel 20 may be communicated with one or more liquid inlet branch 1122 and liquid outlet branch 1222, so that the cooling liquid forms a plurality of flow paths, thereby making the circulation of the cooling liquid smooth, avoiding the blockage caused by the overlarge circumferential distance, and ensuring that all parts in the circumferential direction of the stator 3 are effectively cooled.
Of course, as shown in fig. 7, only one water channel 20 may be provided for the rotating shaft 1 with a smaller diameter, that is, the stator 3 may be cooled in the entire circumferential direction by using one water channel 20, and smooth flow of the coolant may be ensured.
In some embodiments of the present invention, as shown in fig. 2, 3 and 5, one end of the waterway shell 2 has an end wall 21 and the other end is open, the end wall 21 is stopped at one end of the middle portion 13, the other end of the middle portion 13 is configured with a shoulder 15, the shoulder 15 is stopped at the open end of the waterway shell 2 and one end of the stator 3, one side of the end wall 21 facing away from the middle portion 13 is provided with a retaining ring 211, and the retaining ring 211 is stopped at the other end of the end wall 21 and the other end of the stator 3.
For example, the water channel housing 2 and the rotating shaft 1 may be welded and interference-fitted with the stator 3. The end of the waterway shell 2 facing the first end portion 11 is open, the end wall 21 is arranged at the end of the waterway shell 2 facing the second end portion 12, and the end wall 21 is provided with through holes for the second end portion 12 to pass through and avoidance holes corresponding to the plurality of lightening holes 14 one to one. The end of the intermediate portion 13 adjacent the first end portion 11 is configured with a shoulder 15 and a retaining ring 211 is fitted over the second end portion 12 and abuts the end wall 21.
In some embodiments of the present invention, the end of the waterway shell 2 has an end wall 21 and the other end is open, the end wall 21 stops at one end of the middle portion 13, the other end of the middle portion 13 is configured with a shoulder 15, the shoulder 15 stops at the open end of the waterway shell and the one end of the stator, the shoulder 15 is welded with the open end of the waterway shell, and the end wall 21 is welded with the second end 12.
Therefore, the stator 3 and the water channel shell 2 are axially limited by the shaft shoulder 15 and the retainer ring 211 respectively, so that the stability of the relative positions of the water channel shell 2 and the stator 3 and the rotating shaft 1 is ensured, on one hand, the sealing effect on cooling liquid is improved, and on the other hand, the accuracy of the cooling position is ensured.
In addition, in order to further improve the reliability of the retainer ring 211 on the rotating shaft 1, a shrink-ring may be further provided outside the retainer ring 211.
An inner stator assembly according to an embodiment of the present invention is described below.
As shown in fig. 3, the inner stator assembly according to the embodiment of the present invention includes the inner stator cooling device 100 and the stator 3 according to the above embodiment of the present invention, and the stator 3 is sleeved on the outer peripheral surface of the water channel housing 2.
According to the utility model discloses the inner stator subassembly is through utilizing according to the utility model discloses above-mentioned embodiment's inner stator cooling device 100 has advantages such as cooling efficiency height, simple structure, structural strength height.
An electric machine according to an embodiment of the present invention is described below.
As shown in fig. 2 and 6, the motor according to the embodiment of the present invention includes the inner stator assembly and the rotor 4 according to the above-described embodiment of the present invention, and the rotor 4 is rotatably wound around the outside of the stator 3.
According to the utility model discloses motor, through utilizing according to the utility model discloses the inner stator subassembly of above-mentioned embodiment has advantages such as cooling efficiency height, simple structure, structural strength height.
Other constructions and operations of the inner stator assembly and the motor according to embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "particular embodiment," "particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An inner stator cooling device, comprising:
the rotating shaft is divided into a first end part, a middle part and a second end part along the axial direction of the rotating shaft, the diameter of the middle part is larger than that of the first end part and that of the second end part, the first end part is provided with a liquid inlet, and the second end part is provided with a liquid outlet;
the water channel shell is sleeved in the middle part, the outer peripheral surface of the water channel shell is suitable for being fixedly connected with the stator, a water channel is defined between the inner peripheral surface of the water channel shell and the outer peripheral surface of the middle part, and the water channel is communicated with the liquid inlet and the liquid outlet.
2. The inner stator cooling device as claimed in claim 1, wherein a liquid inlet passage and a liquid outlet passage are formed in the rotation shaft, the water passage is communicated with the liquid inlet through the liquid inlet passage, and the water passage is communicated with the liquid outlet through the liquid outlet passage.
3. The inner stator cooling device according to claim 2, wherein the liquid inlet passage includes a liquid inlet main path extending to the intermediate portion in an axial direction of the first end portion and a plurality of liquid inlet branch paths formed at the intermediate portion and communicating with the liquid inlet main path, each of the liquid inlet branch paths extending in a radial direction of the intermediate portion and a plurality of the liquid inlet branch paths being provided at intervals in a circumferential direction of the intermediate portion;
the liquid outlet channel comprises a liquid outlet main path and a plurality of liquid outlet branch paths, the liquid outlet main path extends to the middle part along the axial direction of the second end part, the liquid outlet branch paths are formed in the middle part and are communicated with the liquid outlet main path, each liquid outlet branch path extends along the radial direction of the middle part, and the liquid outlet branch paths are arranged along the circumferential direction of the middle part at intervals.
4. The inner stator cooling device as claimed in claim 3, wherein the intermediate portion is configured with a plurality of weight-reducing holes, each of which penetrates the intermediate portion in an axial direction thereof, a plurality of which are provided at intervals in a circumferential direction thereof, each of which is located between adjacent ones of the liquid inlet branches and between adjacent ones of the liquid outlet branches in the circumferential direction thereof.
5. The inner stator cooling device according to any one of claims 1 to 4, wherein a flow guide rib is provided on at least one of an inner circumferential surface of the water passage housing and an outer circumferential surface of the middle portion, the flow guide rib being positioned in the water passage to define a shape of the water passage.
6. The inner stator cooling device according to claim 5, wherein the number of the water passages is plural, each of the water passages is communicated in an axial direction of the middle portion, and the plural water passages are arranged in a circumferential direction of the middle portion.
7. An inner stator cooling device according to any one of claims 1-4, characterized in that one end of the waterway shell has an end wall and the other end is open, the end wall is stopped at one end of the middle part, the other end of the middle part is configured with a shoulder which stops the open end of the waterway shell and one end of the stator, and the side of the end wall facing away from the middle part is provided with a retaining ring which stops the end wall and the other end of the stator.
8. The inner stator cooling device according to any one of claims 1 to 4, wherein one end of the waterway shell has an end wall and the other end is open, the end wall is stopped at one end of the middle portion, the other end of the middle portion is configured with a shoulder stopping the open end of the waterway shell and one end of the stator, the shoulder is welded with the open end of the waterway shell, and the end wall is welded with the second end portion.
9. An inner stator assembly, comprising:
an inner stator cooling device according to any one of claims 1-8;
the stator is sleeved on the outer peripheral surface of the water channel shell.
10. An electric machine, comprising:
the inner stator assembly of claim 9;
a rotor rotatably surrounding an outer side of the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922343340.5U CN211508741U (en) | 2019-12-23 | 2019-12-23 | Inner stator cooling device, inner stator assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922343340.5U CN211508741U (en) | 2019-12-23 | 2019-12-23 | Inner stator cooling device, inner stator assembly and motor |
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| Publication Number | Publication Date |
|---|---|
| CN211508741U true CN211508741U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922343340.5U Active CN211508741U (en) | 2019-12-23 | 2019-12-23 | Inner stator cooling device, inner stator assembly and motor |
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| CN (1) | CN211508741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851792A (en) * | 2023-08-31 | 2023-10-10 | 山东豪迈数控机床有限公司 | Motorized spindle and preparation method thereof |
-
2019
- 2019-12-23 CN CN201922343340.5U patent/CN211508741U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851792A (en) * | 2023-08-31 | 2023-10-10 | 山东豪迈数控机床有限公司 | Motorized spindle and preparation method thereof |
| CN116851792B (en) * | 2023-08-31 | 2023-11-03 | 山东豪迈数控机床有限公司 | Motorized spindle and preparation method thereof |
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Effective date of registration: 20230118 Address after: No. 3009, BYD Road, Pingshan District, Shenzhen, Guangdong 518118 Patentee after: BYD Co.,Ltd. Patentee after: NANJING BYD AUTOMOBILE Co.,Ltd. Address before: 518118 BYD Road, Pingshan New District, Shenzhen, Guangdong 3009 Patentee before: BYD Co.,Ltd. |