Axial field motor and cooling channel structure thereof

Abstract

The application discloses an axial magnetic field motor and a cooling flow channel structure thereof. The cooling flow channel structure is used for the axial magnetic field motor, the axial magnetic field motor comprises a shell and a stator core arranged in the shell, the cooling flow channel structure is surrounded by the shell and the stator core of the axial magnetic field motor, an installation surface of the shell for installing the stator core is provided with an open slot, the stator core is provided with an inlet and an outlet communicated with the open slot, so that the cooling liquid can enter and exit the cooling flow channel; the stator core is sealingly connected with the shell to cover the open slot and form the cooling flow channel structure; the cooling flow channel structure is surrounded by the stator core and the shell, only the open slot needs to be arranged on the shell, therefore, a forming sand core does not need to be manufactured and used in the process of producing and manufacturing the shell, and the shell can be directly formed by pouring in a mold, so that the production process of the motor shell can be simplified, the production cost is reduced, the production efficiency is improved, the consistency of the shell produced in each batch can be ensured, and the yield is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the axial magnetic field motor technical field, especially relates to an axial magnetic field motor and a cooling flow channel structure thereof. BACKGROUND

[0002] The motor generates copper loss and iron loss when operating, which are finally converted into heat. The higher the power of the motor, the more heat is generated, and a certain cooling method needs to be used to prevent the motor from burning out. The cooling methods include natural cooling, air cooling, water cooling and the like. For high-power motors, water cooling is generally used. A water channel is arranged in the motor shell, and circulating cooling liquid is introduced to achieve cooling of the motor.

[0003] In the prior art, as shown in Figure 1 and Figure 2 , the cooling water channel 02 in the axial magnetic field motor is located inside the shell 01. This kind of shell needs to use a shaped sand core when casting, is fixed in a casting mold, and then a metal liquid is poured. After the metal liquid is cooled and solidified, the sand core is shaken and broken out to form the cooling water channel in the shell. However, the production process of this kind of shell structure is complex, the yield is low, the shaped sand core is a consumable product, a new shaped sand core needs to be made every time of casting, which increases the production cost, increases the product manufacturing process, reduces the production efficiency, and makes the quality of each batch of products unstable and the yield low. SUMMARY

[0004] Therefore, the first object of the present application is to provide a cooling flow channel structure for an axial magnetic field motor to simplify the production process of the motor shell, reduce the production cost, improve the production efficiency and improve the yield.

[0005] The second object of the present application is to provide an axial magnetic field motor using the above cooling flow channel structure.

[0006] To achieve the above objects, the present application provides the following technical solutions.

[0007] A cooling flow channel structure applied to an axial magnetic field motor, the axial magnetic field motor comprising a shell and a stator core arranged in the shell, the cooling flow channel structure comprising:

[0008] An open slot arranged on a mounting surface of the shell for mounting the stator core;

[0009] An inlet and an outlet arranged in the shell and communicated with the open slot;

[0010] The stator core is sealingly connected with the shell to cover the open slot and form the cooling flow channel structure.

[0011] Preferably, the open slot is annular, and a partition is arranged along a radial direction of the open slot, and the partition forms a head end and a tail end of the open slot respectively on two sides of the partition, and the inlet and the outlet are connected to the two sides of the partition respectively.

[0012] Preferably, a bottom surface of the annular slot is circumferentially spaced with a plurality of support platforms, the support platforms are axially provided with first assembly holes, the stator core is axially provided with second assembly holes, and threaded fasteners are matched with the first assembly holes and the second assembly holes respectively to fix the stator core to the housing, and a sealing structure is arranged between a yoke bottom surface of the stator core and a top surface of the support platform.

[0013] Preferably, the sealing structure between the yoke bottom surface of the stator core and the top surface of the support platform comprises a first annular taper arranged between a side wall and a top surface of the support platform, and an annular groove arranged on the top surface of the support platform, and a sealing adhesive layer is filled between the first annular taper and the yoke bottom surface of the stator core and between the annular groove and the yoke bottom surface of the stator core.

[0014] Preferably, a plurality of sealing structures are arranged between the inner and outer rings of the stator core and the housing respectively.

[0015] Preferably, the inner ring of the stator core is provided with an inner ring boss protruding in a radial direction, the outer ring of the stator core is provided with an outer ring boss protruding in a radial direction, the inner and outer side wall surfaces of the open slot are respectively provided with an inner ring step surface and an outer ring step surface, and sealing structures are respectively formed between the yoke bottom surface of the stator core and the inner ring step surface, between the yoke bottom surface of the stator core and the outer ring step surface, between the inner ring boss and the top surface of the inner side wall of the open slot, and between the outer ring boss and the top surface of the outer side wall of the open slot.

[0016] Preferably, the sealing structure between the inner ring boss and the top surface of the inner side wall of the open slot comprises a second annular taper arranged between the inner ring step surface and the inner side wall of the open slot, and a third annular taper arranged between the inner side wall of the open slot and an inner end surface of a slot opening of the open slot, and a sealing adhesive layer is filled between the second annular taper and the yoke bottom surface of the stator core and between the third annular taper and the inner ring boss.

[0017] The sealing structure between the outer ring boss and the top of the outer side wall surface of the open slot comprises a fourth annular taper surface arranged between the outer ring step surface and the outer side wall surface of the open slot and a fifth annular taper surface arranged between the outer side wall surface of the open slot and the slot opening outer end surface of the open slot, and the fourth annular taper surface and the fifth annular taper surface are filled with a sealing glue layer.

[0018] Preferably, the inner ring of the stator core and the outer ring are respectively provided with an insulation layer, the inner ring boss is formed in the insulation layer of the inner ring of the stator core, and the outer ring boss is formed in the insulation layer of the outer ring of the stator core.

[0019] Preferably, the bottom surface of the yoke of the stator core is provided with a shielding plate for shielding the gap on the bottom surface of the yoke of the stator core.

[0020] An axial magnetic field motor comprising the cooling flow channel structure according to any one of the preceding embodiments.

[0021] To achieve the above-mentioned purpose, the application provides a cooling flow channel structure for an axial magnetic field motor, the axial magnetic field motor comprising a shell and a stator core arranged in the shell, the cooling flow channel structure being surrounded by the shell and the stator core of the axial magnetic field motor, wherein the mounting surface of the shell of the stator core for mounting the stator core is provided with an open slot, the shell of the stator core is provided with an inlet and an outlet communicating with the open slot for the cooling liquid to enter and exit the cooling flow channel; the stator core and the shell are sealingly connected to cover the open slot to form the cooling flow channel structure; the cooling flow channel structure is surrounded by the stator core and the shell, only the open slot needs to be arranged on the shell, thus the forming sand core does not need to be manufactured and used in the process of producing the shell, and the shell can be directly formed by pouring in a mold, so that the production process of the motor shell can be simplified, the production cost can be reduced, the production efficiency can be improved, the consistency of the shells produced in each batch can be ensured, and the yield can be improved.

[0022] The application also provides an axial magnetic field motor comprising the cooling flow channel structure described above, the inlet and the outlet of the cooling flow channel structure are connected with the water inlet pipe of the cooling system of the axial magnetic field motor, since the cooling flow channel structure has the technical effects described above, the axial magnetic field motor adopting the cooling flow channel structure should also have the technical effects described above, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative work on the basis of these drawings.

[0024] Figure 1 Structure diagram of the shell of the axial magnetic field motor in the prior art;

[0025] Figure 2 Sectional view of the shell of the axial magnetic field motor in the prior art;

[0026] Figure 3 Assembly diagram of the shell and the stator core in the cooling flow channel structure provided by the embodiment of the present application;

[0027] Figure 4 Exploded view of the cooling flow channel structure provided by the embodiment of the present application;

[0028] Figure 5 Sectional view of the cooling flow channel structure provided by the embodiment of the present application;

[0029] Figure 6 Structure diagram of the shell of the axial magnetic field motor in the cooling flow channel structure provided by the embodiment of the present application;

[0030] Figure 7 Sectional view of the shell of the axial magnetic field motor in the cooling flow channel structure provided by the embodiment of the present application;

[0031] Figure 8 Structure diagram of the stator core of the axial magnetic field motor in the cooling flow channel structure provided by the embodiment of the present application;

[0032] Figure 9 Sectional view of the stator core of the axial magnetic field motor in the cooling flow channel structure provided by the embodiment of the present application;

[0033] Figure 10 Exploded view of the stator core of the axial magnetic field motor in the cooling flow channel structure provided by the embodiment of the present application.

[0034] Figure 1 And Figure 2 In the formula:

[0035] 01 is the shell; 02 is the cooling water channel;

[0036] Figures 3-10 In the formula:

[0037] 1 is the housing; 2 is the stator core; 3 is the open slot; 4 is the inlet or outlet; 5 is the support platform; 6 is the threaded fastener; 7 is the partition plate; 8 is the insulation layer; 9 is the inner ring boss; 10 is the outer ring boss; 11 is the first assembly hole; 12 is the first annular conical surface; 13 is the annular groove; 14 is the inner ring stepped surface; 15 is the second annular conical surface; 16 is the third annular conical surface; 17 is the outer ring stepped surface; 18 is the fourth annular conical surface; 19 is the fifth annular conical surface; 20 is the second assembly hole; 21 is the baffle plate. Detailed Implementation

[0038] One of the core aspects of this invention is to provide a cooling channel structure for an axial magnetic field motor. The design of this cooling channel structure can simplify the motor housing manufacturing process, reduce production costs, improve production efficiency, and increase the yield.

[0039] Another core aspect of this invention is to provide an axial magnetic field motor based on the aforementioned cooling channel structure.

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 3-5 , Figure 3 This is an assembly diagram of the shell and stator core in the cooling channel structure provided in an embodiment of the present invention. Figure 4 This is an exploded view of the cooling channel structure provided in an embodiment of the present invention. Figure 5 This is a cross-sectional view of the cooling channel structure provided in an embodiment of the present invention.

[0042] This invention provides a cooling channel structure applied to an axial magnetic field motor. The axial magnetic field motor includes a housing 1 and a stator core 2 disposed within the housing 1. The cooling channel structure is formed by the housing 1 and the stator core 2 of the axial magnetic field motor. The housing 1 of the stator core 2 has an open slot 3 on its mounting surface for mounting the stator core 2. This open slot 3 can be used in the embodiments described in this invention. Figure 4 The ring shown can also be of other shapes. The housing 1 of the stator core 2 is provided with an inlet and an outlet that communicate with the open slot 3 to connect with the cooling system of the axial magnetic field motor, so as to allow the coolant to enter and exit the cooling channel. The stator core 2 and the housing 1 are sealed together to cover the open slot 3 to form a cooling channel structure.

[0043] Compared with the prior art, the cooling flow channel structure provided by the application is surrounded by the stator core 2 and the shell 1, and only needs to be provided with the open slot 3 on the shell 1, so that the forming sand core does not need to be manufactured and used in the process of producing the shell 1, and the shell 1 can be directly cast in the mold, thereby the production process of the motor shell 1 can be simplified, the production cost is reduced, the production efficiency is improved, the consistency of the shell 1 produced in each batch can be ensured, and the yield is improved.

[0044] As preferred, as shown in Figure 6 and Figure 7 in the embodiment of the application, the open slot 3 is annular, the position of the open slot 3 is consistent with the position on the shell 1 for contacting the stator core 2, and the radial dimension of the annular open slot 3 is slightly smaller than the radial dimension of the yoke of the stator core 2, so that the yoke of the stator core 2 can block the slot opening of the open slot 3.

[0045] Further, as shown in Figure 6 , the open slot 3 is provided with a partition plate 7 in the radial direction, the partition plate 7 forms the head end and the tail end of the open slot 3 on the two sides respectively, so that the open slot 3 forms a structure with the head and the tail connected, and the inlet and the outlet are connected to the two sides of the partition plate 7, so that the cooling liquid can flow around the open slot 3 under the action of water pressure after entering from the inlet, and then flow out from the outlet, thereby avoiding the mixing of the cooling liquid before cooling and the cooling liquid after cooling, and ensuring the cooling effect.

[0046] As preferred, in order to facilitate the assembly of the stator core 2 and the shell 1, as shown in Figures 6-9 , the bottom surface of the annular slot is provided with a plurality of support platforms 5 in the circumferential direction, the support platform 5 is provided with a first assembly hole 11 in the axial direction, the stator core 2 is provided with a second assembly hole 20 in the axial direction, the threaded fastener 6 is matched with the first assembly hole 11 and the second assembly hole 20 respectively to fix the stator core 2 to the shell 1, the yoke bottom surface of the stator core 2 is in contact with the top of the support platform 5, and a sealing structure around the first assembly hole 11 and the second assembly hole 20 is arranged between the yoke bottom surface of the stator core 2 and the top of the support platform 5, so that the support platform 5 can provide support for the stator core 2 and realize the function of connection.

[0047] The support platform 5 can be arranged at any position of the bottom surface of the open slot 3, for example, the support platform 5 can be arranged on the two sides of the open slot 3 and be attached to the side wall surface of the open slot 3 or be spaced apart from the side wall surface of the open slot 3 by a certain gap, or the support platform 5 can be arranged in the middle of the open slot 3, and a gap for the cooling liquid to flow through is left between the two side walls of the open slot 3 and the support platform 5.

[0048] The cross section of the support platform 5 can adopt various shapes, and the circumferential wall surface thereof should as far as possible adopt a structure without corners and edges to reduce the resistance to the cooling liquid, such as a circular shape, an oval shape, a boat shape, a drop shape and the like, and in the embodiment of the application, the cross section of the support platform 5 is circular.

[0049] It should be noted that the assembly of the stator core 2 and the housing 1 is not necessarily achieved by setting a support platform 5 in the open slot 3. Alternatively, a first assembly hole 11 can be set on the inner and outer sides of the open slot 3 on the housing 1. The first assembly hole 11 does not pass through the open slot 3. A second assembly hole 20 is opened at the corresponding position of the yoke of the stator core 2, and then the two are connected by a threaded fastener 6.

[0050] Preferably, to ensure the sealing effect of the cooling channel, the sealing structure between the bottom surface of the yoke of the stator core 2 and the top of the support platform 5 preferably includes multiple sealing positions, such as... Figure 7 As shown, in this embodiment of the invention, the sealing structure between the bottom surface of the yoke of the stator core 2 and the top of the support platform 5 includes two sealing positions, including a first annular conical surface 12 disposed between the side wall and the top surface of the support platform 5 and an annular groove 13 disposed on the top surface of the support platform 5. A sealing adhesive layer is filled between the first annular conical surface 12 and the bottom surface of the yoke of the stator core 2 and between the annular groove 13 and the bottom surface of the yoke of the stator core 2.

[0051] Preferably, the inner and outer rings of the stator core 2 also need to be well sealed with the housing 1. To improve the sealing effect, multiple sealing structures with staggered upper and lower positions are provided between the inner and outer rings of the stator core 2 and the housing 1.

[0052] like Figure 8 and Figure 9 As shown, in this embodiment of the invention, the inner ring of the stator core 2 is provided with a radially protruding inner ring boss 9, and the outer ring of the stator core 2 is provided with a radially protruding outer ring boss 10. The inner ring boss 9 and the outer ring boss 10 can be located on the same horizontal plane or on different horizontal planes. There is a certain height difference between the lower surfaces of the inner ring boss 9 and the outer ring boss 10, i.e., the surfaces away from the teeth of the stator core 2, and the ground of the yoke of the stator core 2. Correspondingly, the inner and outer walls of the open slot 3 are respectively provided with inner ring step surfaces 14 and outer ring step surfaces 17. Sealing structures are formed between the bottom surface of the yoke of the stator core 2 and the inner ring step surface 14, between the bottom surface of the yoke of the stator core 2 and the outer ring step surface 17, between the inner ring boss 9 and the top of the inner wall of the open groove 3, and between the outer ring boss 10 and the top of the outer wall of the open groove 3. In this way, two staggered sealing structures are formed between the two sides of the yoke of the stator core 2 and the two sides of the open groove 3. Combined with the double sealing structure between the bottom surface of the yoke of the stator core 2 and the support platform 5, the sealing effect between the stator core 2 and the housing 1 is better and more reliable, avoiding leakage problems.

[0053] Specifically, such as Figure 7As shown, the sealing structure between the inner ring boss 9 and the top of the inner side wall surface of the open slot 3 comprises a second annular taper surface 15 arranged between the inner ring step surface 14 and the inner side wall surface of the open slot 3 and a third annular taper surface 16 arranged between the inner side wall surface of the open slot 3 and the slot opening inner end surface of the open slot 3, the second annular taper surface 15 and the third annular taper surface 16 are filled with a sealing glue layer between the yoke bottom surface of the stator core 2 and the inner ring boss 9; the sealing structure between the outer ring boss 10 and the top of the outer side wall surface of the open slot 3 comprises a fourth annular taper surface 18 arranged between the outer ring step surface 17 and the outer side wall surface of the open slot 3 and a fifth annular taper surface 19 arranged between the outer side wall surface of the open slot 3 and the slot opening outer end surface of the open slot 3, the fourth annular taper surface 18 and the fifth annular taper surface 19 are filled with a sealing glue layer between the yoke bottom surface of the stator core 2 and the outer ring boss 10.

[0054] As preferred, in the embodiment of the present application, the inner ring and the outer ring of the stator core 2 are respectively provided with an insulation layer 8, which can be arranged on both inner and outer sides of the yoke of the stator core 2 or wrapped outside the yoke of the stator core 2, the inner ring boss 9 is formed on the insulation layer 8 of the inner ring of the stator core 2, and the outer ring boss 10 is formed on the insulation layer 8 of the outer ring of the stator core 2.

[0055] At present, the stator core 2 is generally formed by punching and rolling silicon steel sheets or adopts a split structure, and the yoke and the tooth are assembled to form, no matter what structure the stator core 2 adopts, a gap may exist in the yoke of the stator core 2, in order to avoid the gap causing the leakage of the cooling liquid, in the embodiment of the present application, as shown, Figure 10 the yoke bottom surface of the stator core 2 is provided with a shielding plate 21 for blocking the gap on the yoke bottom surface of the stator core 2, of course, even if the yoke of the stator core 2 does not have a gap, the shielding plate 21 can also be arranged, which not only can shield the gap of the yoke of the stator core 2, but also can avoid the direct contact of the stator core 2 with the cooling liquid.

[0056] The embodiment of the present application also provides an axial magnetic field motor, which comprises the cooling flow channel structure as described in the above embodiment, and the inlet and outlet of the cooling flow channel structure are respectively connected with the water inlet pipe of the cooling system of the axial magnetic field motor, since the axial magnetic field motor adopts the cooling flow channel structure in the above embodiment, the technical effects of the axial magnetic field motor please refer to the above embodiment.

[0057] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0058] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling passage structure applied to an axial field motor including a housing and a stator core provided in the housing, characterized by, The cooling flow channel structure comprises: An open slot arranged on a mounting surface of the housing for mounting the stator core; An inlet and an outlet arranged on the housing and communicated with the open slot; The stator core is sealingly connected with the housing to cover the open slot and form the cooling flow channel structure; The open slot is annular, and a partition plate is arranged on the open slot in the radial direction, and the partition plate forms a head end and a tail end of the open slot respectively on two sides of the partition plate, and the inlet and the outlet are connected with the open slot on two sides of the partition plate respectively; A plurality of support tables are arranged on the bottom surface of the open slot in the circumferential direction, the support tables are provided with first assembly holes in the axial direction, the stator core is provided with second assembly holes in the axial direction, threaded fasteners are matched with the first assembly holes and the second assembly holes respectively to fix the stator core to the housing, and a sealing structure is arranged between the bottom surface of the yoke of the stator core and the top of the support table and surrounds the first assembly hole and the second assembly hole; The sealing structure between the bottom surface of the yoke of the stator core and the top of the support table comprises a first annular taper surface arranged between the side wall and the top surface of the support table and an annular groove arranged on the top surface of the support table, and a sealing adhesive layer is filled between the first annular taper surface and the bottom surface of the yoke of the stator core and between the annular groove and the bottom surface of the yoke of the stator core; A plurality of sealing structures are arranged between the inner and outer rings of the stator core and the housing respectively and are arranged in an up-down staggered manner; The bottom surface of the yoke of the stator core is provided with a shielding plate for blocking the gap on the bottom surface of the yoke of the stator core.

2. The cooling runner structure according to claim 1, characterized by The inner ring of the stator core is provided with an inner ring boss protruding in the radial direction, the outer ring of the stator core is provided with an outer ring boss protruding in the radial direction, the inner and outer side wall surfaces of the open slot are respectively provided with an inner ring step surface and an outer ring step surface, and sealing structures are respectively formed between the bottom surface of the yoke of the stator core and the inner ring step surface, between the bottom surface of the yoke of the stator core and the outer ring step surface, between the inner ring boss and the top of the inner side wall surface of the open slot, and between the outer ring boss and the top of the outer side wall surface of the open slot.

3. The cooling runner structure according to claim 2, characterized by The sealing structure between the inner ring boss and the top of the inner side wall surface of the open slot comprises a second annular taper surface arranged between the inner ring step surface and the inner side wall surface of the open slot and a third annular taper surface arranged between the inner side wall surface of the open slot and the inner end surface of the slot of the open slot, and a sealing adhesive layer is filled between the second annular taper surface and the bottom surface of the yoke of the stator core and between the third annular taper surface and the inner ring boss; The sealing structure between the outer ring boss and the top of the outer side wall surface of the open slot comprises a fourth annular taper surface arranged between the outer ring step surface and the outer side wall surface of the open slot and a fifth annular taper surface arranged between the outer side wall surface of the open slot and the outer end surface of the slot of the open slot, and a sealing adhesive layer is filled between the fourth annular taper surface and the bottom surface of the yoke of the stator core and between the fifth annular taper surface and the outer ring boss.

4. The cooling runner structure according to claim 2 or 3, characterized by The inner circle and the outer circle of the stator core are respectively provided with an insulation layer, the inner ring boss is formed on the insulation layer of the inner circle of the stator core, and the outer ring boss is formed on the insulation layer of the outer circle of the stator core.

5. An axial field electric machine characterized by A cooling channel structure as claimed in any one of claims 1 to 4.

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