CN213585483U - Motor refrigerant cooling structure - Google Patents
Motor refrigerant cooling structure Download PDFInfo
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- CN213585483U CN213585483U CN202022998421.1U CN202022998421U CN213585483U CN 213585483 U CN213585483 U CN 213585483U CN 202022998421 U CN202022998421 U CN 202022998421U CN 213585483 U CN213585483 U CN 213585483U
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Abstract
The utility model discloses a motor refrigerant cooling structure, including frame, stator core and rotor core, stator core pass through interference fit assemble in the inside of frame, rotor core locates stator core's inside, the frame be equipped with the refrigerant entry and with the refrigerant entry links to each other, is used for the refrigerant to flow with the cooling the refrigerant runner of the outer disc of location iron core, stator core's first side is equipped with and is used for acceping the follow the first cavity of the refrigerant of refrigerant runner's export outflow, stator core with be formed with between the rotor core and be used for supplying refrigerant in the first cavity flows in with the cooling stator core's interior disc with the air gap of the outer disc of rotor core. Above-mentioned motor refrigerant cooling structure, assembly structure is simple, through the flow of refrigerant, not only can realize the even cooling to the stator, can realize the even cooling to the rotor moreover.
Description
Technical Field
The utility model relates to a motor heat dissipation technical field, in particular to motor refrigerant cooling structure.
Background
The stator and the rotor are core components for energy conversion of the high-speed permanent magnet motor, the stator consists of a stator winding and a stator iron core, and the rotor consists of a rotating shaft, a rotor iron core and a permanent magnet. When alternating symmetrical three-phase current is introduced into the stator three-phase winding, the stator winding can generate heat; when the motor runs, the stator iron core generates alternating magnetic flux to cause loss in the iron core to generate heat, and meanwhile, the stator iron core generates electromagnetic induction current to form eddy current to generate heat; in addition, the rotor core and the permanent magnets generate heat due to the generation of loss. If the internal temperature of the stator core of the motor is too high, the coil and other parts of the stator winding are easy to age, the electrical insulation performance is influenced, the internal temperature of the rotor is too high, and the rotor permanent magnet works in a high-temperature environment for a long time, so that the demagnetization phenomenon can be caused. Therefore, cooling of the stator and rotor needs to be considered during the motor design process.
At present, there are various cooling methods for the stator and the rotor, for example, there are a water cooling channel arranged at the upper end of the base and a water cooling jacket arranged in the base and corresponding to the water cooling channel, and there are also motor bases using water cooling, which include an inner cylinder, an outer cylinder, a water inlet and a water outlet arranged in the outer cylinder, and water-proof ribs arranged in the inner cylinder and in a mirror image arrangement, wherein the outer cylinder is hermetically sleeved on the inner cylinder to form a flow channel for cooling water. However, the cooling structure designed in the prior art and the motor cooling area with the cooling structure are only limited to the outer circle of the stator, and for a motor with large power and large heat generation amount, the motor stator cannot be uniformly cooled, and the motor rotor cannot be cooled, and if cooling is required, another motor cooling mode needs to be combined, so that the cooling system of the motor is quite complicated.
Therefore, how to avoid the problem that the motor cannot meet the cooling requirement of the stator and the rotor is a technical problem to be solved by those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a motor refrigerant cooling structure, assembly structure is simple, can realize the even cooling to stator and rotor.
In order to achieve the above object, the utility model provides a motor refrigerant cooling structure, including frame, stator core and rotor core, stator core pass through interference fit assemble in the inside of frame, rotor core locates stator core's inside, the frame be equipped with the refrigerant entry and with the refrigerant entry links to each other, is used for the refrigerant to flow in order to cool off stator core's outer disc refrigerant runner, stator core's first side is equipped with and is used for acceping the follow the first cavity of the refrigerant of refrigerant runner's export outflow, stator core with be formed with between the rotor core and be used for supplying refrigerant in the first cavity flows in with the cooling stator core's interior disc with the air gap of the outer disc of rotor core.
Optionally, a front end bearing and a front end cover fixedly connected to the base are disposed on a first side of the stator core, the front end cover and the front end bearing form the first cavity, and a first shaft end seal for preventing leakage of a refrigerant in the first cavity is disposed on a side of the front end bearing away from the stator core.
Optionally, a rear end bearing and a rear end cover fixedly connected to the base are disposed on a second side of the stator core, and a second cavity for receiving the refrigerant flowing out of the air gap is formed between the rear end cover and the rear end bearing.
Optionally, a second shaft end seal for preventing leakage of the refrigerant in the second cavity is disposed on one side of the rear end bearing, which is far away from the stator core.
Optionally, a refrigerant outlet for flowing out of the refrigerant is formed at the bottom of the second cavity.
Optionally, the refrigerant inlet is disposed at the bottom of the base and located at an end of the base close to the refrigerant outlet, and the outlet of the refrigerant flow channel is disposed at the top of the base and located at an end of the base away from the refrigerant outlet.
Optionally, an axis of the refrigerant inlet is parallel to an axis of the refrigerant outlet.
Optionally, the refrigerant channel is specifically a channel with a serpentine structure.
Optionally, the inner wall of the stator core is provided with a plurality of axial channels distributed along the circumferential direction and used for allowing a cooling medium to flow so as to cool the stator core.
Optionally, the coolant channel of the base is integrally formed by casting.
Compared with the prior art, the embodiment of the utility model provides a motor refrigerant cooling structure, the test platform comprises a support, stator core and rotor core, stator core passes through interference fit and assembles in the inside of frame, stator core's inside is located to rotor core, furtherly, the frame is equipped with refrigerant entry and refrigerant runner, wherein, the refrigerant runner links to each other with the refrigerant entry, the refrigerant runner is used for supplying the refrigerant to flow with the outer disc of cooling positioning core, and simultaneously, stator core's first side is equipped with first cavity, first cavity is used for acceping the refrigerant that flows from the export of refrigerant runner, be formed with the air gap between stator core and the rotor core, the air gap is arranged in supplying the refrigerant inflow in the first cavity with the interior disc of cooling stator core and the outer disc of rotor core. It can be seen that the coolant enters the base from the coolant inlet, flows along the coolant channel to cool the whole outer circumferential surface of the stator core, then enters the first cavity from the channel outlet and cools the front end surfaces of the stator core and the rotor, and then flows into the air gap between the stator core and the rotor core, so that the cooling of the inner circumferential surface of the stator core and the outer circumferential surface of the rotor core is realized. So, compare and can only realize the refrigerated mode that sets up to the stator among the prior art, the embodiment of the utility model provides a motor refrigerant cooling structure, assembly structure is simple, through the flow of refrigerant, not only can realize the even cooling to the stator, can realize the even cooling to the rotor moreover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a cooling schematic view of a cooling structure of a motor refrigerant according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a-a in fig. 1.
Wherein:
1-first shaft end seal, 2-rotor, 3-front end cover, 4-base, 5-coolant channel, 51-outlet, 6-stator core, 7-rotor core, 8-rear end bearing, 9-rear end cover, 10-coolant outlet, 11-coolant inlet, 12-front end bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a motor refrigerant cooling structure, assembly structure is simple, can realize the even cooling to stator and rotor.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic cooling diagram of a cooling structure of a motor coolant according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional view of a-a in fig. 1. In fig. 1, the direction of the arrow is the flowing direction of the refrigerant.
The embodiment of the utility model provides a motor refrigerant cooling structure, including frame 4, stator core 6 and rotor core 7, stator core 6 assembles in frame 4's inside through interference fit, and rotor core 7 is coaxial to be set up in stator core 6's inside.
It should be noted that the inner hole of the base 4 is a cylindrical surface, which is an assembly surface with the stator core 6, and the diameter of the inner hole is smaller than that of the outer cylindrical surface of the stator core 6, the base 4 needs to be heated during assembly, so that the inner hole of the base 4 is heated and expanded, after the stator core 6 is assembled, when the temperature is cooled to normal temperature, a certain interference magnitude is formed between the inner hole of the base 4 and the stator core 6, and the interference magnitude at this time needs to meet the requirement of being capable of transmitting the maximum torque during the working process of the motor, and a sufficient safety margin needs to be provided.
Further, the base 4 is provided with a refrigerant inlet 11 and a refrigerant flow channel 5, wherein the refrigerant flow channel 5 is connected to the refrigerant inlet 11, the refrigerant flow channel 5 is used for allowing a refrigerant to flow to cool the outer circular surface of the positioning iron core, the refrigerant flow channel 5 is preferably a groove formed in the inner wall of the base 4, the groove is distributed on the inner circular cylindrical surface of the base 4 by 360 degrees, and the groove is preferably a serpentine bending structure or a reciprocating structure formed by combining a plurality of S-shaped structures.
It should be noted that the coolant channel 5 provided on the base 4 may be integrally formed by casting. When the stator core 6 is assembled on the base 4 in an interference fit manner, the stator core 6 and the refrigerant channel 5 together form a cavity for the refrigerant to flow.
In addition, a front end bearing 12 and a front end cover 3 fixedly connected with the base 4 are arranged on a first side (the left side as shown in fig. 1) of the stator core 6, the front end cover 3 and the front end bearing 12 form a first cavity, the first cavity on the first side of the stator core 6 is used for accommodating a refrigerant flowing out from an outlet 51 of the refrigerant flow channel 5, meanwhile, a first shaft end seal 1 is arranged on one side, away from the stator core 6, of the front end bearing 12, and the first shaft end seal 1 is used for preventing the refrigerant in the first cavity from leaking, so that air tightness is ensured.
Further, an air gap is formed between the stator core 6 and the rotor core 7, and the air gap is used for the refrigerant in the first cavity to flow in to cool the inner circular surface of the stator core 6 and the outer circular surface of the rotor core 7. The air gap is formed between the inner circumferential surface of the stator core 6 and the outer circumferential surface of the rotor core 7, and the size can be determined by the assembling relationship of the stator and the rotor 2 in the prior art.
It can be seen that the refrigerant enters the base 4 from the refrigerant inlet 11, flows along the refrigerant flow channel 5 to cool the outer circumferential surface of the stator core 6360 °, then enters the first cavity from the flow channel outlet 51 to cool the front end surfaces of the stator core 6 and the rotor 2, and then flows into the air gap between the stator core 6 and the rotor core 7, thereby cooling the inner circumferential surface of the stator core 6 and the outer circumferential surface of the rotor core 7.
So, compare and can only realize the refrigerated mode that sets up to the stator among the prior art, the embodiment of the utility model provides a motor refrigerant cooling structure, assembly structure is simple, through the flow of refrigerant, not only can realize the even cooling to the stator, can realize the even cooling to rotor 2 moreover.
Correspondingly, a rear end bearing 8 and a rear end cover 9 fixedly connected with the base 4 are arranged on a second side (right side as shown in fig. 1) of the stator core 6, a second cavity is formed by the rear end cover 9 and the rear end bearing 8, the second cavity is used for accommodating a refrigerant flowing out from the air gap, and the refrigerant entering the second cavity can cool the stator core 6 and the rear end face of the rotor 2. In addition, the bottom of the second cavity is further provided with a refrigerant outlet 10 for flowing out of the refrigerant, and the refrigerant outlet 10 can be arranged at the rear end of the base 4. In this way, the refrigerant flowing out of the air gap between the stator core 6 and the rotor core 7 may enter the second cavity and then be discharged out of the motor through the refrigerant outlet 10.
In order to ensure air tightness, a second shaft end seal is arranged on one side of the rear end bearing 8, which is far away from the stator core 6, and is used for preventing the refrigerant in the second cavity from leaking.
Of course, according to actual requirements, the refrigerant inlet 11 may be disposed at the bottom of the base 4 and located at one end of the base 4 close to the refrigerant outlet 10, an axis of the refrigerant inlet 11 is disposed along a vertical direction, and the outlet 51 of the refrigerant flow channel 5 is disposed at the top of the base 4 and located at one end of the base 4 far from the refrigerant outlet 10. In the process that the refrigerant entering from the refrigerant inlet 11 passes through the refrigerant flow channel 5 and flows out from the outlet 51 of the refrigerant flow channel 5, the outer circumferential surface of the stator core 6 at 360 degrees can be cooled along the peripheral direction of the stator core 6. Of course, the axis of the refrigerant outlet 10 may be disposed parallel to the axis of the refrigerant inlet 11.
In order to optimize the above embodiment, the inner wall of the stator core 6 is provided with a plurality of axial channels distributed along the circumferential direction, any one of the axial channels penetrates along the axial direction of the stator core 6, and the axial channel is used for allowing a cooling medium to flow so as to cool the stator core 6.
Specifically speaking, during the preparation, at the suitable position punching of arbitrary stator punching the hole of circle along circumference equipartition, stator core 6 that is formed by such stator punching stack will form the axial passageway of circle along circumference equipartition, and like this, the refrigerant flows through, can also cool off stator core 6's inside, can improve the cooling effect greatly like this.
It should be noted that the refrigerant is typically R134a (1, 1, 1, 2-tetrafluoroethane), which is one of the most widely used medium-low temperature environment-friendly refrigerants, and has good combination properties, including easy evaporation and non-conductive properties.
In summary, when the motor operates, a refrigerant enters the refrigerant channel 5 from the refrigerant inlet 11 below the base 4 (the refrigerant can be pumped from the refrigerant inlet 11), cools the stator core 6 and the stator winding along the refrigerant channel 5, flows out of the outlet 51 of the channel located at the front end of the motor to the first cavity, then passes through the air gap between the stator core 6 and the rotor core 7 to cool the stator core 6, the rotor core 7 and the permanent magnet, and finally converges in the second cavity at the rear end of the motor to flow out of the refrigerant outlet 10 at the rear end of the base 4, so that the whole cycle can be completed. Therefore, the stator core 6 and the rotor 2 of the whole motor can be uniformly cooled, and the problem that the performance of the motor is influenced due to overhigh local temperature is avoided.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
It is right above the utility model provides a motor refrigerant cooling structure has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the solution and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. A motor refrigerant cooling structure comprises a machine base (4), a stator iron core (6) and a rotor iron core (7), the stator core (6) is assembled in the machine base (4) in an interference fit manner, the rotor core (7) is arranged in the stator core (6), it is characterized in that the base (4) is provided with a refrigerant inlet (11) and a refrigerant flow channel (5) which is connected with the refrigerant inlet (11) and is used for cooling the outer circular surface of the stator core (6) by the flowing of the refrigerant, a first cavity for accommodating the refrigerant flowing out of the outlet (51) of the refrigerant channel (5) is arranged at the first side of the stator core (6), an air gap for allowing the refrigerant in the first cavity to flow into so as to cool the inner circular surface of the stator core (6) and the outer circular surface of the rotor core (7) is formed between the stator core (6) and the rotor core (7).
2. The cooling medium cooling structure of the motor according to claim 1, wherein a front end bearing (12) and a front end cover (3) fixedly connected to the base (4) are disposed on a first side of the stator core (6), the front end cover (3) and the front end bearing (12) form the first cavity, and a first shaft end seal (1) for preventing a cooling medium in the first cavity from leaking is disposed on a side of the front end bearing (12) away from the stator core (6).
3. The cooling structure of refrigerant in motor according to claim 2, wherein a rear end bearing (8) and a rear end cover (9) fixed to the housing (4) are disposed on a second side of the stator core (6), and a second cavity for receiving refrigerant flowing out of the air gap is formed between the rear end cover (9) and the rear end bearing (8).
4. The cooling structure of refrigerant in motor according to claim 3, wherein a second shaft end seal for preventing refrigerant in the second cavity from leaking is provided on a side of the rear end bearing (8) away from the stator core (6).
5. The cooling structure of refrigerant in motor according to claim 4, wherein the bottom of the second cavity is provided with a refrigerant outlet (10) for flowing out of refrigerant.
6. The cooling medium cooling structure of claim 5, wherein the cooling medium inlet (11) is disposed at a bottom of the base (4) and located at an end of the base (4) close to the cooling medium outlet (10), and the outlet (51) of the cooling medium flow channel (5) is disposed at a top of the base (4) and located at an end of the base (4) far away from the cooling medium outlet (10).
7. The cooling structure of refrigerant for electric motor according to claim 6, wherein the axis of the refrigerant inlet (11) is parallel to the axis of the refrigerant outlet (10).
8. The cooling medium cooling structure of an electric machine according to any one of claims 1 to 7, wherein the cooling medium flow channel (5) is a flow channel with a serpentine structure.
9. The cooling structure of the cooling medium for the motor according to any one of claims 1 to 7, wherein the inner wall of the stator core (6) is provided with a plurality of axial channels distributed along the circumferential direction for the cooling medium to flow to cool the stator core (6).
10. The cooling medium cooling structure of an electric machine according to claim 8, wherein the cooling medium flow passage (5) of the housing (4) is integrally formed by casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022998421.1U CN213585483U (en) | 2020-12-14 | 2020-12-14 | Motor refrigerant cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022998421.1U CN213585483U (en) | 2020-12-14 | 2020-12-14 | Motor refrigerant cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213585483U true CN213585483U (en) | 2021-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022998421.1U Active CN213585483U (en) | 2020-12-14 | 2020-12-14 | Motor refrigerant cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213585483U (en) |
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- 2020-12-14 CN CN202022998421.1U patent/CN213585483U/en active Active
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| GR01 | Patent grant | ||
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Effective date of registration: 20230508 Address after: Room 1108, 11th Floor, Building 1, Hunan (Zhuzhou) Employment and Entrepreneurship Guidance Center, Yunlong Demonstration Zone, Zhuzhou City, Hunan Province, 412000 Patentee after: Hunan CRRC Shangqu Electric Co.,Ltd. Address before: 412000 Tianxin hi tech park, Shifeng District, Zhuzhou City, Hunan Province Patentee before: CRRC Zhuzhou Electric Co.,Ltd. |
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| TR01 | Transfer of patent right |