A stator heat dissipation structure and motor

Abstract

The present invention discloses a stator heat dissipation structure and a motor, wherein the stator heat dissipation structure is arranged in cooperation with the rotor, and comprises: a stator core and a winding. The winding is wound on the stator core in an alternate rotational manner parallel to the axial direction of the stator core, and the winding has a plurality of rotational portions extending from the end face of the stator core; at least one pair of adjacent rotational portions is arranged with unequal lengths away from the end face of the stator core. The stator heat dissipation structure of this structure is exposed to the outside of the stator core by staggered rotational portions of the winding, and has a pair of adjacent rotational portions arranged with unequal lengths, so that the lengths extending from the end face of the stator core are different, so that adjacent windings overlap at the rotational portions, thereby increasing the contact area and heat exchange area between the heat exchange winding and the outside, greatly improving the heat dissipation efficiency of the stator winding, and thus achieving control of temperature rise.

Description

Technical Field

[0001] The present invention relates to the technical field of motor heat dissipation, and in particular to a stator heat dissipation structure and a motor. Background Art

[0002] The motor is the power source of new energy vehicles, and the motor is the key component that converts power and mechanical energy into each other. During the use of the motor, the motor will generate a lot of heat, and the generation of heat often affects the performance of the motor. Therefore, due to the physical properties of the materials used to make the motor, there is an allowable temperature for the motor during operation.

[0003] The generation of the above heat and the setting of the allowable temperature usually depend on two aspects: on the one hand, it depends on the heating of the running components in the motor, and on the other hand, it comes from the heat dissipation of the internal components of the motor. In actual use, the excessive temperature of the motor has a great impact on the insulation material of the motor, causing the winding insulation to age and directly affecting the service life and energy efficiency of the motor. Severe heating will cause damage to the motor and shorten the life of the motor. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the heat dissipation effect of the internal parts of the motor in the prior art is poor, resulting in a high temperature rise, which shortens the service life of the motor.

[0005] Therefore, in the actual operation of the motor, the temperature of the motor winding end is the highest point of the motor temperature. Therefore, the temperature of the motor winding end determines the working performance of the whole machine.

[0006] The present invention provides a stator heat dissipation structure, which is arranged in cooperation with a rotor; comprising:

[0007] stator core,

[0008] and a winding, wherein the winding is wound around the stator core in an alternate rotational manner in a direction parallel to the axial direction of the stator core, and the winding has a plurality of rotational portions extending from an end surface of the stator core;

[0009] At least one pair of adjacent rotating parts has unequal lengths away from the end surface of the stator core.

[0010] Optionally, in the above-mentioned stator heat dissipation structure, the stator core is arranged in a cylindrical structure and is arranged inside or outside the rotor; the winding is rotationally wound on the inner wall surface or the outer wall surface of the stator core.

[0011] Optionally, in the above-mentioned stator heat dissipation structure, the inner wall surface of the stator core is provided with a plurality of stator slots, the stator slots extend parallel to the axial direction of the stator core, and the stator slots are recessed from inside to outside along the inner wall surface of the stator core; or

[0012] A plurality of stator slots are arranged on the outer wall surface of the stator core, and the stator slots are arranged concavely from the outside to the inside along the outer wall surface of the stator core.

[0013] Optionally, in the above-mentioned stator heat dissipation structure, any one of the rotating parts is in a U-shaped structure.

[0014] Optionally, in the above-mentioned stator heat dissipation structure, two ends of any of the rotating parts extend into adjacent stator slots; and / or

[0015] Both ends of any of the rotating parts extend into the spaced stator slots.

[0016] Optionally, in the above-mentioned stator heat dissipation structure, the rotating part includes a first rotating part and a second rotating part extending from the end surface of the stator core and arranged alternately;

[0017] The length of the end surface of the first turning portion extending from the stator core is greater than the length of the end surface of the second turning portion extending from the stator core.

[0018] Optionally, in the above-mentioned stator heat dissipation structure, the first rotating part and the second rotating part are alternately stacked and arranged along the radial direction of the stator core; and / or

[0019] The first turning portion and the second turning portion are arranged at intervals along the circumferential direction of the stator core.

[0020] A motor, comprising the above-mentioned stator heat dissipation structure;

[0021] and a housing and end covers arranged at both ends of the housing; the housing and the end covers enclose an installation space, and the installation space is installed with:

[0022] A rotor and a rotating shaft, wherein the rotating shaft and the rotor are fixedly arranged, and the rotor and the stator heat dissipation structure are cooperatively arranged.

[0023] Optionally, in the above-mentioned motor, the housing is provided with a first flow hole, and the cooling medium flows into the installation space through the first flow hole; and / or

[0024] The end cover is provided with a second flow hole, and the cooling medium flows into the installation space through the second flow hole.

[0025] Optionally, the above motor further comprises an air cooling component, wherein the air cooling component is arranged on the rotor end cover.

[0026] The air cooling assembly comprises a fan body and a cover body, and cooling wind is formed on both sides of the fan body to cool the air in the installation space.

[0027] The technical solution provided by the present invention has the following advantages:

[0028] 1. The stator heat dissipation structure provided by the present invention is arranged in cooperation with the rotor, and comprises: a stator core and a winding. The winding is wound on the stator core in an alternate rotational manner parallel to the axial direction of the stator core, and the winding has a plurality of rotational portions extending from the end surface of the stator core; at least one pair of adjacent rotational portions is arranged with unequal lengths away from the end surface of the stator core.

[0029] The stator heat dissipation structure of this structure is exposed outside the stator core through the stator core's rotating parts, and has a pair of adjacent rotating parts with unequal lengths, so that the lengths extending from the end surface of the stator core are different. Therefore, adjacent windings have overlapping areas at the rotating parts, increasing the contact area and heat exchange area between the heat exchange winding and the outside world, greatly improving the heat dissipation efficiency of the stator winding, thereby achieving control of temperature rise.

[0030] 2. The stator heat dissipation structure provided by the present invention is provided with a cylindrical stator core and is provided inside or outside the rotor; the winding is rotatably wound on the inner wall surface or the outer wall surface of the stator core. The stator heat dissipation structure of this structure can be applied to different forms of stator and rotor matching, and further adapted to the heat dissipation of the stator in different forms of inner rotor or outer rotor structure, thereby improving the adaptability of the stator heat dissipation structure in different rotor matching forms.

[0031] 3. The stator heat dissipation structure provided by the present invention is provided with a plurality of stator slots on the inner wall surface of the stator core, the stator slots extend parallel to the axial direction of the stator core, and the stator slots are recessed from the inside to the outside along the inner wall surface of the stator core; or a plurality of stator slots are provided on the outer wall surface of the stator core, and the stator slots are recessed from the outside to the inside along the outer wall surface of the stator core. In the stator heat dissipation structure of this structure, the stator slots are provided to reserve installation space for winding installation, thereby improving the overall integration without reducing the motor performance.

[0032] 4. The motor provided by the present invention includes a stator heat dissipation structure, a housing and end covers arranged at both ends of the housing; the housing and the end covers enclose an installation space, and the installation space is equipped with: a rotor and a rotating shaft, the rotating shaft is fixedly arranged with the rotor, and the rotor is arranged in cooperation with the stator heat dissipation structure. The housing is provided with a first flow hole, and the cooling medium is passed into the installation space through the first flow hole; and / or the end cover is provided with a second flow hole, and the cooling medium is passed into the installation space through the second flow hole. The air cooling component is arranged on the end cover, and the air cooling component includes a fan body and a cover body, and cooling wind is formed on both sides of the fan body to cool the air in the installation space.

[0033] The motor of this structure is designed for overall heat dissipation of motors with different cooling methods. For example, for motors with natural air cooling or oil cooling, the cooling medium is introduced through the first flow hole and the second flow hole to cool the installation space, and the heat at the winding is further removed by exchange with the external fluid, thereby achieving the purpose of cooling. In addition, the air cooling component can be used in air-cooled motors to enhance air agitation and improve the heat dissipation effect of the air-cooled motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 It is a structural schematic diagram of the stator heat dissipation structure provided in Example 1;

[0036] Figure 2 It is a structural schematic diagram of the stator heat dissipation structure provided in Example 2;

[0037] Figure 3 is a cross-sectional view of the motor provided in Example 1;

[0038] Figure 4 is a cross-sectional view of another implementation of the motor provided in Example 1;

[0039] Description of reference numerals:

[0040] 1- stator core;

[0041] 2-winding; 21-first rotating part; 22-second rotating part;

[0042] 31- rotor; 32- shaft

[0043] 41-housing; 411-first flow hole; 42-end cover; 421-second flow hole;

[0044] 51-fan body; 52-cover body; DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] Example 1

[0050] This embodiment provides a motor, taking an inner rotor motor as an example. Figure 1 , Figure 3 and Figure 4As shown, it includes: a housing 41 and end covers 42 arranged at both ends of the housing 41. The housing 41 and the end covers 42 enclose an installation space, and the installation space is installed with: a rotor 31, a rotating shaft 32, and a stator. Among them, the rotating shaft 32 is inserted into the rotor 31 and fixedly arranged with the rotor 31; the rotor 31 is arranged in cooperation with the stator, and the rotor 31 is sleeved in the stator. When the rotor 31 rotates under the action of the magnetic force of the coil winding 2 in the stator, the rotating shaft 32 rotates at the same time, thereby realizing the start of the motor.

[0051] In this embodiment, the stator includes a stator core 1 and a winding 2. Figure 1 As shown, the stator core 1 is provided in a cylindrical structure and is sleeved outside the rotor 31; the winding 2 is alternately rotated and wound on the inner wall surface of the stator along the axial direction parallel to the stator core 1, and the winding 2 has a first rotating part 21 and a second rotating part 22 alternately arranged at the end surface extending from the stator core 1; the end surface length of the first rotating part 21 extending from the stator core 1 is greater than the end surface length of the second rotating part 22 extending from the stator core 1, and the first rotating part and the second rotating part are arranged at intervals along the radial direction of the stator core. For example, any rotating part is a U-shaped structure. In addition, in this embodiment, the winding 2 is a flat copper wire winding 2.

[0052] In this embodiment, only two lengths of the first rotating part and the second rotating part are taken as examples. Of course, in fact, in other optional implementations, the length of each rotating part can be different, as long as the rotating parts set at intervals can increase the heat dissipation area.

[0053] In this embodiment, a plurality of stator slots are provided on the inner wall surface of the stator core 1, the stator slots extend parallel to the axial direction of the stator core 1, and are recessed from the inside to the outside along the inner wall surface of the stator core 1. The provision of the stator slots reserves installation space for the winding 2, thereby improving the overall integration without reducing the motor performance.

[0054] During specific installation and use, the two ends of any rotating part extend into adjacent stator slots respectively. Of course, in other optional embodiments, the two ends of any rotating part can extend into the spaced stator slots. The spaced stator slots can be spaced by one stator slot, two stator slots, or more stator slots.

[0055] In this embodiment, if Figure 3As shown, for naturally cooled motors with low requirements for airtightness, cooling air can be used as the cooling medium. A first flow hole 411 is provided on the housing 41, and cooling air is ventilated into the installation space through the first flow hole 411; correspondingly, a second flow hole 421 is provided on the end cover 42, and cooling air is ventilated into the installation space through the second flow hole 421. Both the first flow hole 411 and the second flow hole 421 can be circular through holes. In this way, the outside air enters the motor, and the ends of the staggered windings 2, namely the first rotating part 21 and the second rotating part 22, are fully in contact with the outside air, further improving the heat dissipation efficiency. For example, the first flow hole 411 and the second flow hole 421 are arranged opposite to the rotating part.

[0056] Of course, in other embodiments, such as Figure 4 As shown, the air-cooled motor is applied and also includes an air-cooling component installed. The air-cooling component is arranged on the end cover 42 of the rotor 31. The air-cooling component includes a fan body 51 and a cover body 52. ​​Cooling wind is formed on both sides of the fan body 51 to cool the air in the installation space.

[0057] Of course, the stator heat dissipation structure provided in this embodiment can be applied to oil-cooled motors, such as motors in which the first rotating part 21 and the second rotating part 22 at the end of the winding 2 are sprayed with oil, dripped with oil or immersed in oil. The staggered first rotating part 21 and the second rotating part 22 can increase the heat exchange area, thereby effectively controlling the temperature rise of the motor. At this time, the cooling medium can be cooling oil, for example, corresponding to Figure 3 The cooling oil is dripped downward along the first flow hole, or the cooling oil is dripped into the second flow hole. Of course, in other embodiments, the first flow hole and the second flow hole can be connected to the external cooling oil by spraying. Since the rate of oil spraying is faster than that of oil dripping, the circulation of the cooling medium can be accelerated to achieve further cooling optimization.

[0058] The stator heat dissipation structure of the present embodiment has the first turning portion 21 and the second turning portion 22 of different lengths extending out of the end surface of the stator core 1 through the winding 2, so that the first turning portion 21 and the second turning portion 22 are alternately exposed outside the stator core 1 in sequence, thereby increasing the contact area and heat exchange area between the winding 2 and the outside world, thereby greatly improving the heat dissipation efficiency of the stator winding 2, and further ensuring that the temperature rise of the motor is effectively controlled.

[0059] Example 2

[0060] This embodiment provides a motor, which is different from the motor provided in Embodiment 1 in that the arrangement of the coil winding is different, and the first rotating part and the second rotating part are arranged at intervals along the circumferential direction of the stator core. Figure 2 As shown, the second rotating parts are arranged on both sides of a first rotating part, and the first rotating parts are arranged on both sides of a second rotating part.

[0061] Of course, in other optional embodiments, a first rotating portion and a second rotating portion can be provided on both sides of a first rotating portion, as long as a heat dissipation space is retained between adjacent rotating portions to increase the heat dissipation area of ​​the stator coil end. Of course, the above-mentioned setting method is not unique and will not be listed in detail here.

[0062] Example 3

[0063] This embodiment provides a motor, which is different from the motor provided in Embodiment 1 or Embodiment 2 in that the arrangement of the coil winding is different. On the one hand, the first rotating part and the second rotating part are arranged at intervals along the circumferential direction of the stator core, and on the other hand, multiple layers of the first rotating part and the second rotating part are alternately arranged along the radial direction of the stator core. For example, a first rotating part is taken as an example, and its two sides along the radial direction are the second rotating parts, and its two sides along the circumferential direction are the second rotating parts. Therefore, the winding arrangement provided by this embodiment has a larger heat dissipation space left around the rotating part, so the heat dissipation effect of the motor using the method of this embodiment is better.

[0064] Example 4

[0065] This embodiment provides a motor, which is different from the motor provided in any one of Embodiments 1 to 3 in that the motor in this embodiment can be an outer rotor motor, and the stator core is arranged outside the motor rotor. In this embodiment, a plurality of stator slots are arranged on the outer wall surface of the stator core 1, and the stator slots extend parallel to the axial direction of the stator core 1, and are arranged concave from the inside to the outside along the inner wall surface of the stator core 1. The setting of the stator slots reserves installation space for the winding 2 when it is installed, and improves the overall integration without reducing the performance of the motor.

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A motor, characterized in that: The invention comprises a stator heat dissipation structure, a shell (41), and end covers (42) arranged at both ends of the shell (41); the shell (41) and the end covers (42) enclose an installation space, and the installation space is installed with: A rotor (31) and a rotating shaft (32), wherein the rotating shaft (32) and the rotor (31) are fixedly arranged, and the rotor (31) and the stator heat dissipation structure are cooperatively arranged; The stator heat dissipation structure comprises: The stator core (1) is arranged in cooperation with the rotor (31). and a winding (2), wherein the winding (2) is wound around the stator core (1) in an alternating rotational manner along an axial direction parallel to the stator core (1), and the winding (2) has a plurality of rotational portions extending from an end surface of the stator core (1); The turning part comprises a first turning part (21) and a second turning part (22) which extend out of the end surface of the stator core (1) and are arranged alternately; the length of the end surface of the first turning part (21) extending out of the stator core (1) is greater than the length of the end surface of the second turning part (22) extending out of the stator core (1); The first rotating parts (21) and the second rotating parts (22) are arranged at intervals along the circumferential direction of the stator core (1); each of the first rotating parts (21) is provided with a second rotating part (22) on both sides, and each of the second rotating parts (22) is provided with a first rotating part (21) on both sides; The housing (41) is provided with a first flow hole (411) penetrating along the radial direction of the stator core (1), and the end cover (42) is provided with a second flow hole (421) penetrating along the axial direction of the stator core (1), the first flow hole (411) and the second flow hole (421) being arranged opposite to the rotating part; the cooling medium flows into the installation space through the first flow hole (411) and the second flow hole (421).

2. The motor according to claim 1, characterized in that The stator core (1) is arranged in a cylindrical structure and is arranged inside the rotor (31) or outside the rotor (31); the winding (2) is rotatably wound on the inner wall surface or the outer wall surface of the stator core (1).

3. The motor according to claim 2, characterized in that: The inner wall surface of the stator core (1) is provided with a plurality of stator slots, the stator slots extending parallel to the axial direction of the stator core (1), and the stator slots being arranged concavely from the inside to the outside along the inner wall surface of the stator core (1); or A plurality of stator slots are arranged on the outer wall surface of the stator iron core (1), and the stator slots are arranged concavely from the outside to the inside along the outer wall surface of the stator iron core (1).

4. The motor according to claim 3, characterized in that Any of the rotating parts is in a U-shaped structure.

5. The motor according to claim 4, characterized in that Both ends of any of the rotating parts extend into adjacent stator slots; or Both ends of any of the rotating parts extend into the spaced stator slots.

6. The motor according to claim 1, characterized in that It also includes an air cooling component, which is arranged on the end cover (42). The air cooling assembly comprises a fan body (51) and a cover body (52), and cooling wind is formed on both sides of the fan body (51) to cool the air in the installation space.

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