Stator core mechanism, motor and vehicle

Abstract

The invention provides a stator core mechanism, a motor and a vehicle, and relates to the technical field of motors. According to the stator iron core mechanism provided by the invention, on one hand, the stator iron core is cooled from the outer side of the stator iron core by utilizing the cooling sleeve arranged on the outer side of the stator iron core in a sleeving manner; on the other hand, a concave part is formed in the outer side of the stator iron core, a cooling groove extending towards the inner side of the stator iron core in the radial direction is formed in the concave part, cooling liquid is injected into the cooling groove through the first cooling ring, the cooling liquid is recycled from the cooling groove through the second cooling ring, and the stator iron core is cooled from the interior of the stator iron core. Compared with the prior art, the stator iron core mechanism provided by the invention has the advantages that the stator iron core is cooled from the outer side of the stator iron core and the interior of the stator iron core respectively, so that a better cooling effect is achieved, and the condition that the temperature of the stator iron core is too high can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator core mechanism, a motor and a vehicle. Background Art

[0002] With the rapid development of new energy vehicle technology, the power density of motors is increasingly required, and the cooling and heat dissipation of motors is an important factor that restricts the improvement of motor power density. The cooling and heat dissipation of motors directly affects the reliability and service life of motors. Therefore, improving the cooling and heat dissipation capacity of motors plays an important role in promoting high power density motors. In the current motor stator core cooling solution, the method of adding heat dissipation channels to the casing or increasing the area of ​​heat dissipation ribs is used to improve the cooling and heat dissipation capacity, but this heat transfer method is difficult to cool directly, resulting in the problem of excessive temperature of the motor stator core. Summary of the invention

[0003] In view of this, the present invention provides a stator core mechanism, a motor and a vehicle, the purpose of which is to solve the technical problems mentioned in the above background technology.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] In one aspect, the present invention provides a stator core mechanism, the stator core mechanism comprising a stator core, a cooling jacket, a first cooling ring, a second cooling ring, a first cooling channel, and a second cooling channel;

[0006] The stator core has axial, circumferential and radial directions. A plurality of recesses are arranged at intervals along the circumferential direction on the outer side of the stator core. A cooling groove extending radially inwardly of the stator core is provided at the bottom of the recess. Both ends of the cooling groove are open on both side end surfaces of the stator core in the axial direction.

[0007] The cooling jacket is sleeved on the outer side of the stator core, and a plurality of convex parts are arranged on the inner side of the cooling jacket, wherein the plurality of convex parts are arranged in one-to-one correspondence with the plurality of concave parts, and the convex parts are accommodated in the corresponding concave parts;

[0008] The first cooling ring and the second cooling ring are respectively abutted against two sides of the stator core in the axial direction, and the first cooling ring and the second cooling ring are provided with through holes at positions corresponding to the cooling grooves, so that the first cooling ring and the second cooling ring are both connected to the cooling grooves;

[0009] The first cooling channel is connected to the cooling jacket and the first cooling ring, the second cooling channel is connected to the cooling jacket and the second cooling ring, the first cooling channel is used to transport coolant to the cooling jacket, the first cooling ring and the second cooling ring, and the second cooling channel is used to receive return coolant from the cooling jacket and the second cooling ring.

[0010] Furthermore, in a preferred embodiment, there are multiple cooling sleeves, which are spaced apart in the axial direction.

[0011] Furthermore, in a preferred embodiment, two cooling sleeves located at the outermost sides in the axial direction of the cooling sleeves are respectively flush with the two side end surfaces of the stator core in the axial direction.

[0012] Furthermore, in a preferred embodiment, the cooling groove extends radially.

[0013] Furthermore, in a preferred embodiment, the first cooling channel, the second cooling channel, the cooling jacket, the first cooling ring and the second cooling ring are all integrated structures.

[0014] Furthermore, in a preferred embodiment, the recess is arranged between two pairs of poles of the stator core.

[0015] Furthermore, in a preferred embodiment, the first cooling channel and the second cooling channel are circumferentially spaced 180 degrees apart, the first cooling channel is located above the stator core, and the second cooling channel is located below the stator core.

[0016] On the other hand, the present invention further provides a motor, comprising the stator core mechanism described in any one of the above preferred embodiments.

[0017] Furthermore, in a preferred embodiment, the motor further comprises a winding wound around the stator core, and the first cooling ring and the second cooling ring are both sleeved and fixed on the outside of the winding.

[0018] On the other hand, the present invention further provides a vehicle, comprising the motor described in the above preferred embodiment.

[0019] The beneficial effects of the present invention are:

[0020] The stator core mechanism provided by the present invention, on the one hand, utilizes a cooling sleeve sleeved on the outside of the stator core to cool the stator core from the outside of the stator core. On the other hand, a recess is provided on the outside of the stator core, a cooling groove extending radially inward of the stator core is provided in the recess, a coolant is injected into the cooling groove through a first cooling ring, and the coolant is recovered from the cooling groove through a second cooling ring, so as to realize cooling of the stator core from the inside of the stator core.

[0021] Compared with the prior art, the stator core mechanism provided by the present invention cools the stator core from the outside and the inside of the stator core respectively, thereby having a better cooling effect and being able to effectively prevent the stator core from overheating.

[0022] In addition, the present invention also reduces the weight of the stator core by providing a recessed portion on the outer side of the stator core and a cooling groove on the bottom of the recessed portion.

[0023] In addition, the present invention can accommodate the convex portion on the inner side of the cooling jacket by providing a concave portion on the outer side of the stator core, so that the convex portion of the cooling jacket is equivalent to being embedded in the outer side of the stator core, thereby achieving the cooling jacket and the stator core to cooperate without increasing the outer diameter of the overall structure formed by the cooling jacket and the stator core too much, which is beneficial to reducing the volume of the stator core.

[0024] The invention is applicable to a stator core mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a three-dimensional schematic diagram of a motor structure provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a plan view of a stator core of a stator core mechanism provided in an embodiment of the present invention;

[0028] Figure 3 is a plan view of a cooling jacket of a stator core mechanism provided by an embodiment of the present invention;

[0029] Figure 4 is a plan view of an axial cooling channel of a stator core mechanism provided by an embodiment of the present invention;

[0030] Figure 5 It is a three-dimensional structural schematic diagram of the cooperation between the axial cooling channel and the cooling ring of the stator core mechanism provided by an embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the flow direction of the coolant of the stator core mechanism provided in an embodiment of the present invention.

[0032] Among them, 1-stator core; 2-recess; 3-cooling groove; 4-cooling jacket; 5-axial cooling channel; 6-first cooling ring; 6-second cooling ring; 7-winding. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] According to a first aspect of an embodiment of the present invention, a stator core 1 structure is provided. Figures 1 to 6 The structure and working principle of the stator core 1 mechanism are described in detail.

[0038] According to the stator core 1 mechanism provided in the embodiment of the present invention, the stator core 1 mechanism includes a stator core 1, a cooling sleeve 4, a first cooling ring 6, a second cooling ring 6, a first cooling channel and a second cooling channel. In the embodiment, the stator core 1 has axial, circumferential and radial directions, and a plurality of recesses 2 are arranged at intervals along the circumferential direction on the outer side of the stator core 1, and a cooling groove 3 extending radially inwardly of the stator core 1 is provided at the bottom of the recess 2, and both ends of the cooling groove 3 are open on both side end faces of the stator core 1 in the axial direction.

[0039] In the embodiment, the cooling jacket 4 is sleeved on the outer side of the stator core 1 , and a plurality of convex portions are arranged on the inner side of the cooling jacket 4 . The plurality of convex portions are arranged in one-to-one correspondence with the plurality of concave portions 2 , and the convex portions are accommodated in the corresponding concave portions 2 .

[0040] In the embodiment, the first cooling ring 6 and the second cooling ring 6 are respectively abutted against two sides of the stator core 1 in the axial direction, and the first cooling ring 6 and the second cooling ring 6 both have through holes arranged corresponding to the cooling groove 3, so that the first cooling ring 6 and the second cooling ring 6 are both connected to the cooling groove 3.

[0041] In an embodiment, the first cooling channel is connected to the cooling jacket 4 and the first cooling ring 6, the second cooling channel is connected to the cooling jacket 4 and the second cooling ring 6, the first cooling channel is used to transport coolant to the cooling jacket 4, the first cooling ring 6 and the second cooling ring 6, and the second cooling channel is used to receive reflux coolant from the cooling jacket 4 and the second cooling ring 6.

[0042] Thus, according to the stator core 1 mechanism provided by the embodiment of the present invention, on the one hand, the cooling sleeve 4 sleeved on the outside of the stator core 1 is used to cool the stator core 1 from the outside of the stator core 1. On the other hand, a recess 2 is provided on the outside of the stator core 1, and a cooling groove 3 extending radially inwardly of the stator core 1 is provided in the recess 2, and a coolant is injected into the cooling groove 3 through the first cooling ring 6, and the coolant is recovered from the cooling groove 3 through the second cooling ring 6, so that the stator core 1 is cooled from the inside of the stator core 1.

[0043] Compared with the prior art, the stator core 1 mechanism provided in the embodiment of the present invention cools the stator core 1 from the outside of the stator core 1 and the inside of the stator core 1 respectively, thereby having a better cooling effect and being able to effectively prevent the stator core 1 from overheating.

[0044] Furthermore, in the embodiment, the recess 2 provided on the outer side of the stator core 1 and the cooling groove 3 provided on the bottom of the recess 2 can also play a role in reducing the weight of the stator core 1 .

[0045] In addition, in the embodiment, the recessed portion 2 provided on the outer side of the stator core 1 can accommodate the convex portion on the inner side of the cooling jacket 4, so that the convex portion of the cooling jacket 4 is equivalent to being embedded in the outer side of the stator core 1, thereby achieving the cooperation between the cooling jacket 4 and the stator core 1 without increasing the outer diameter of the overall structure formed by the cooling jacket 4 and the stator core 1 too much, which is beneficial to reducing the volume of the stator core 1.

[0046] According to the stator core 1 structure provided by the embodiment of the present invention, in the embodiment, the first cooling channel and the second cooling channel may both be straight tube structures extending along the axial direction of the stator core 1 .

[0047] According to the stator core 1 structure provided by the embodiment of the present invention, the cooling groove 3 is open on both side end faces of the stator core 1 in the axial direction, that is, the cooling groove 3 axially penetrates the stator core 1. In addition, the recess 2 mentioned in the above description can also extend from one side end face of the stator core 1 in the axial direction to the other side end face.

[0048] According to the stator core 1 structure provided by the embodiment of the present invention, the number of cooling sleeves 4 can be multiple, and can be arranged at intervals along the axial direction. In the embodiment, the number of cooling sleeves 4 is multiple, which can increase the cooling area of ​​external cooling provided by the cooling sleeves 4 for the stator core 1, thereby improving the cooling effect.

[0049] In addition, compared with the sleeve structure completely covering the outside of the stator core 1, the multiple cooling sleeves 4 arranged at intervals along the axial direction can effectively form a circumferential flow channel due to the smaller size in the axial direction, so that the coolant flows along the predetermined circumferential trajectory in the cooling sleeve 4, thereby obtaining a stable and relatively uniform cooling effect. On the other hand, the sleeve structure completely covering the outside of the stator core 1 requires a large amount of coolant to fill the sleeve structure, and the flow direction of the coolant inside the sleeve structure is difficult to predict and control, which easily results in poor local cooling effect of the stator core 1.

[0050] According to the stator core 1 structure provided by the embodiment of the present invention, as an example, the cooling jackets 4 may include 4, 5, 6 or even more cooling jackets.

[0051] According to the stator core 1 structure provided by the embodiment of the present invention, the two cooling jackets 4 located at the outermost sides in the axial direction of the cooling jackets 4 are respectively flush with the two side end surfaces in the axial direction of the stator core 1. In this way, the assembly and positioning of the cold plate jacket is facilitated. In addition, in the embodiment, the intervals between adjacent cooling jackets 4 can be the same.

[0052] According to the stator core 1 structure provided in an embodiment of the present invention, the cooling groove 3 extends radially, so that the coolant flowing through the cooling groove 3 can exchange heat with the interior of the stator core 1 in a regular manner, thereby ensuring that the stator core 1 is cooled from the inside in a uniform manner. In addition, the cooling groove 3 extending radially is also easy to process.

[0053] According to the stator core 1 structure provided in the embodiment of the present invention, the first cooling channel, the second cooling channel, the cooling sleeve 4, the first cooling ring 6 and the second cooling ring 6 are an integrated structure, so that these structures for the circulation and circulation of the coolant have better integrity and sealing performance.

[0054] According to the stator core 1 structure provided by the embodiment of the present invention, the recess 2 can be provided between two pairs of poles of the stator core. Taking a 6-pole 54-slot motor as an example, when the motor is powered on, a closed loop is formed between one pair of poles (i.e., the N pole and the S pole) of the magnetic circuit of the stator core 1, and a recess 2 is provided between the two pairs of poles, i.e., a semi-elliptical material is removed to form the recess 2, and the magnetic circuit between the two pairs of poles forms a closed loop along both sides of each, so that even if slots are provided on the stator core 1, the electromagnetic performance of the motor is not affected.

[0055] Then, a cooling groove 3 can be further opened below the recess 2. According to its position and shape, the cooling groove 3 can be called a "I"-shaped hole (groove) of the yoke. As described above, the cooling groove 3 reduces the weight of the stator core 1 while ensuring the motor's operating performance and structural requirements. In the embodiment, the number of poles of the motor is p, and the number of recesses 2 and cooling grooves 3 is also p. The size of the recess 2 and the cooling groove 3 can be reasonably selected according to the motor's operating magnetic circuit.

[0056] According to the stator core 1 mechanism provided by the embodiment of the present invention, the first cooling channel and the second cooling channel are 180 degrees apart in the circumferential direction, the first cooling channel is located above the stator core 1, and the second cooling channel is located below the stator core 1. In this way, the first cooling channel serves as a liquid inlet channel, the coolant flows into the cooling jacket 4, flows downward, and flows back from the second cooling channel; the coolant also enters the first cooling ring 6, and then flows into the axial cooling channel 5 defined by the inner wall of the cooling groove 3 through the first cooling ring 6, and then further flows into the second cooling ring 6, and then flows downward and flows back into the second cooling channel.

[0057] According to a second aspect of an embodiment of the present invention, a motor is provided. The motor includes the stator core 1 structure as described above, and also includes the above beneficial effects, which will not be described in detail here.

[0058] According to the motor provided in the embodiment of the present invention, the motor may further include a winding 7 wound around the stator core 1, and the first cooling ring 6 and the second cooling ring 6 are both sleeved and fixed on the outside of the winding 7. For example, the first cooling ring 6 and the second cooling ring 6 may fit with the winding 7 in an interference fit manner, thereby achieving the fixation of the first cooling ring 6 and the second cooling ring 6.

[0059] According to a third aspect of an embodiment of the present invention, a vehicle is provided, which includes the above motor and the above beneficial effects, which will not be repeated here. The vehicle can be, for example, a new energy vehicle, which at least uses electric energy as a driving force.

[0060] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent structural changes made by using the contents of the specification and drawings of the present invention under the innovative concept of the present invention, or directly / indirectly applied in other related technical fields are included in the protection scope of the present invention.

Claims

1. A stator core mechanism, characterized in that: The stator core mechanism comprises a stator core, a cooling jacket, a first cooling ring, a second cooling ring, a first cooling channel and a second cooling channel; The stator core has axial, circumferential and radial directions. A plurality of recesses are arranged at intervals along the circumferential direction on the outer side of the stator core. A cooling groove extending radially inwardly of the stator core is provided at the bottom of the recess. Both ends of the cooling groove are open on both side end surfaces of the stator core in the axial direction. The cooling jacket is sleeved on the outer side of the stator core, and a plurality of convex parts are arranged on the inner side of the cooling jacket, wherein the plurality of convex parts are arranged in one-to-one correspondence with the plurality of concave parts, and the convex parts are accommodated in the corresponding concave parts; The first cooling ring and the second cooling ring are respectively abutted against two sides of the stator core in the axial direction, and the first cooling ring and the second cooling ring are provided with through holes at positions corresponding to the cooling grooves, so that the first cooling ring and the second cooling ring are both connected to the cooling grooves; The first cooling channel is connected to the cooling jacket and the first cooling ring, the second cooling channel is connected to the cooling jacket and the second cooling ring, the first cooling channel is used to transport coolant to the cooling jacket, the first cooling ring and the second cooling ring, and the second cooling channel is used to receive return coolant from the cooling jacket and the second cooling ring.

2. The stator core structure according to claim 1, characterized in that: The cooling jackets are multiple in number and are arranged at intervals along the axial direction.

3. The stator core structure according to claim 2, characterized in that: The two cooling sleeves located at the outermost sides in the axial direction of the cooling sleeves are respectively flush with the two side end surfaces of the stator core in the axial direction.

4. The stator core structure according to claim 1, characterized in that: The cooling groove extends in a radial direction.

5. The stator core structure according to claim 1, characterized in that: The first cooling channel, the second cooling channel, the cooling jacket, the first cooling ring and the second cooling ring are all integrated structures.

6. The stator core structure according to claim 1, characterized in that: The recess is arranged between two pairs of poles of the stator core.

7. The stator core structure according to claim 1, characterized in that: The first cooling channel and the second cooling channel are spaced 180 degrees apart in the circumferential direction. The first cooling channel is located above the stator core, and the second cooling channel is located below the stator core.

8. A motor, characterized in that: The electric motor comprises the stator core structure according to any one of claims 1 to 7.

9. The motor according to claim 8, characterized in that The motor further comprises a winding wound around the stator core, and the first cooling ring and the second cooling ring are both sleeved and fixed on the outer side of the winding.

10. A vehicle, characterized in that: The vehicle comprises an electric machine as claimed in claim 8 or 9.

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