Disc type motor cooling structure and disc type motor

Abstract

A disc type motor cooling structure disclosed by the present invention comprises a stator shell, a stator iron core and an upper cover plate, a lower cavity is arranged in the stator shell, an upper cavity is arranged in the upper cover plate, a coil is arranged outside the stator iron core to form a stator iron core assembly, and the stator iron core assembly is located in the lower cavity of the stator shell. The stator core assemblies are arranged in an annular array mode, gaps are reserved between the stator core assemblies and used for being communicated with cooling liquid, the stator shell is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are communicated with the lower cavity, a lower blocking plate is further arranged in the stator shell, and the lower blocking plate is located in the gap between the liquid inlet and the liquid outlet. According to the disc type motor, cooling liquid can make contact with the periphery of the stator iron core, and can make contact with the top and the bottom of the stator iron core, so that the cooling liquid makes contact with the stator iron core to the maximum extent, the heat dissipation efficiency of the stator iron core is improved, and the service life of the disc type motor is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of disc motors, and in particular to a disc motor cooling structure and a disc motor. Background Art

[0002] The disc motor is also called the axial magnetic field motor. The magnetic field direction inside the motor is along the axial direction. The axial magnetic field motor is generally flat in structure. The disc motor is particularly suitable for occasions with strict requirements on motor volume and weight due to its higher core utilization, greater power density and higher torque density. Due to the high power density of the disc motor, higher requirements are placed on the heat dissipation of the motor.

[0003] In order to improve the working efficiency of the disc motor, a cooling system must be designed for the disc motor. There are two main types of cooling systems, one is air cooling and the other is liquid cooling. Compared with air cooling, liquid cooling is more efficient. Existing liquid cooling systems mainly use indirect cooling and direct cooling; the indirect cooling method is that the coolant is in indirect contact with the cooled parts, and the cooling efficiency is low, which affects the service life of the disc motor; the direct cooling method is that the liquid refrigerant can fully contact the stator core directly for heat exchange to reduce the temperature of the stator core, thereby improving the heat dissipation efficiency of the stator core, but the existing direct cooling method only contacts the surface of the stator core, but cannot contact the top and bottom of the stator core, so it is impossible to achieve higher efficiency in the heat dissipation of the stator core. Summary of the invention

[0004] The object of the present invention is to provide a disc motor cooling structure and a disc motor in view of the defects and shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a disc motor cooling structure, comprising a stator shell, a stator core and an upper cover plate, wherein a lower cavity is provided inside the stator shell, and an upper cavity is provided inside the upper cover plate, and the innovation thereof lies in: a coil is arranged outside the stator core to form a stator core assembly, and the stator core assembly is located inside the lower cavity of the stator shell, and is arranged in an annular array, a gap is left between the stator core assemblies, and the gap is used to connect the coolant, a liquid inlet and a liquid outlet are arranged on the stator shell, and the liquid inlet and the liquid outlet are connected with the lower cavity, a lower baffle plate is also arranged inside the stator shell, and the lower baffle plate is located in the gap between the liquid inlet and the liquid outlet; the annular array on the lower cavity of the stator shell A plurality of lower through holes and lower inlet and outlet holes are provided, a lower flow channel of a U-shaped structure is provided inside the lower cavity, the lower through holes are located above the lower flow channel, and the two are interconnected, the lower through holes are located at the bottom of the stator core, the lower inlet and outlet holes are located in the outer ring of the lower cavity, and are connected to the lower flow channel; a plurality of upper through holes and upper inlet and outlet holes are provided in a circular array on the upper cavity of the upper cover plate, an upper flow channel of a U-shaped structure is provided inside the upper cavity, the upper through holes are located below the upper flow channel, and the two are interconnected, the upper through holes are located at the top of the stator core, the upper inlet and outlet holes are located in the outer ring of the upper cavity, and are connected to the upper flow channel, an upper baffle plate is provided inside the upper cavity of the upper cover plate, and after the stator shell and the upper cover plate are installed, the upper baffle plate corresponds to the lower baffle plate.

[0006] Furthermore, the internal annular array of the stator housing is provided with a plurality of lower mounting grooves, the number of the lower mounting grooves is consistent with the number of the stator core, and the two are clearance-matched, and the lower mounting grooves are arranged above the lower flow channel, and the lower through holes are located in the lower mounting grooves.

[0007] Furthermore, a plurality of upper mounting grooves are provided in the inner annular array of the upper cover plate, the number of the upper mounting grooves is consistent with the number of the stator core, and the two are clearance-matched, and the upper mounting grooves are arranged below the upper flow channel, and the upper through holes are located in the upper mounting grooves.

[0008] Furthermore, the upper part and the lower part of the stator core protrude from the coil respectively, and the protruding parts are respectively consistent with the depth of the lower mounting groove and the upper mounting groove.

[0009] Furthermore, a positioning protrusion is arranged on the top of the lower blocking plate, and a positioning groove is provided on the bottom of the upper blocking plate, and the positioning groove cooperates with the positioning protrusion.

[0010] Furthermore, the lower baffle plate is integrally formed with the stator housing, and the upper baffle plate is integrally formed with the upper cover plate.

[0011] A disc motor, the innovation point of which is: comprising a disc motor cooling structure, in which two adjacent disc motor cooling structures, the liquid outlet of the upper disc motor cooling structure is connected to the liquid inlet of the lower disc motor cooling structure.

[0012] After adopting the above structure, the beneficial effects of the present invention are:

[0013] The present invention not only allows the coolant to be in direct contact with the four sides of the stator core through the gap, but also provides flow channels inside the stator shell and inside the upper cover plate respectively, and the flow channels are connected with the cavity through the through holes, so that the coolant can be in contact with the top and bottom of the stator core, thereby making contact with the stator core to the greatest extent, and being able to fully directly contact the stator core for heat exchange to reduce the temperature of the stator core, thereby improving the heat dissipation efficiency of the stator core and extending the service life of the disc motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the split structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention after removing the upper cover plate;

[0016] Figure 3 This is one of the structural schematic diagrams of the stator housing in the present invention;

[0017] Figure 4 This is the second structural schematic diagram of the stator housing in the present invention;

[0018] Figure 5 This is one of the structural schematic diagrams of the upper cover plate in the present invention;

[0019] Figure 6 This is the second structural schematic diagram of the upper cover plate in the present invention;

[0020] Figure 7 It is a schematic structural diagram of the lower baffle plate and the upper baffle plate in the present invention.

[0021] Description of reference numerals:

[0022] 1 stator housing, 11 liquid inlet, 12 liquid outlet, 13 lower baffle plate, 14 lower through hole, 15 lower liquid inlet and outlet hole, 16 lower flow channel, 17 lower mounting groove, 2 stator core, 3 upper cover plate, 31 upper through hole, 32 upper liquid inlet and outlet hole, 33 upper flow channel, 34 upper baffle plate, 35 upper mounting groove, 4 coil, 5 gap. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Example 1

[0026] See also Figure 1-6 A disc motor cooling structure includes a stator housing 1, a stator core 2 and an upper cover plate 3. A lower cavity is provided inside the stator housing 1, an upper cavity is provided inside the upper cover plate 3, a coil 4 is arranged outside the stator core 2 to form a stator core assembly, and the stator core assembly is located inside the lower cavity of the stator housing 1 and arranged in an annular array, a gap 5 is left between the stator core assemblies, and the gap 5 is used to connect the coolant, a liquid inlet 11 and a liquid outlet 12 are provided on the stator housing 1, and the liquid inlet 11 and the liquid outlet 12 are connected with the lower cavity, a lower baffle plate 13 is further provided inside the stator housing 1, and the lower baffle plate 13 is located in the gap 5 between the liquid inlet 11 and the liquid outlet 12; a plurality of lower through holes 14 and lower inlet and outlet holes 15 are arranged in an annular array on the lower cavity of the stator housing 1. A U-shaped lower flow channel 16 is arranged inside the lower cavity, the lower through hole 14 is located above the lower flow channel 16, and the two are interconnected, the lower through hole 14 is located at the bottom of the stator core 2, and the lower inlet and outlet hole 15 is located in the outer ring of the lower cavity and is connected with the lower flow channel 14; a plurality of upper through holes 31 and upper inlet and outlet holes 32 are arranged in a circular array on the upper cavity of the upper cover plate 3, an upper flow channel 33 of U-shaped structure is arranged inside the upper cavity, the upper through hole 31 is located below the upper flow channel 33, and the two are interconnected, the upper through hole 31 is located at the top of the stator core 2, the upper inlet and outlet hole 32 is located in the outer ring of the upper cavity and is connected with the upper flow channel 33, an upper baffle plate 34 is arranged inside the upper cavity of the upper cover plate 3, and after the stator housing 1 and the upper cover plate 3 are installed, the upper baffle plate 13 and the lower baffle plate 34 correspond to each other. Specifically, the coolant enters the lower cavity and the upper cavity from the liquid inlet 11, and on the one hand, flows in the gap 5, and is in direct contact with the four sides of the stator core 2 for heat exchange, thereby improving the heat dissipation efficiency of the stator core 2; on the other hand, the coolant enters the lower flow channel 14 and the upper flow channel 33 from the lower inlet and outlet holes 15 and the upper inlet and outlet holes 32, and contacts the bottom and the bottom of the stator core 2 through the lower through hole 14 and the upper through hole 31 for heat exchange, thereby further improving the heat dissipation efficiency of the stator core 2 and extending the service life of the disc motor; the coolant finally flows out from the lower inlet and outlet holes 15 and the upper inlet and outlet holes 32 on the other side, and is discharged through the liquid outlet 12.

[0027] It should be noted that in order to allow the coolant to completely enter the lower flow channel 16 and the upper flow channel 33, the flow rate and flow velocity of the coolant may be increased.

[0028] In this embodiment, a plurality of lower mounting grooves 17 are provided in an annular array inside the stator housing 1 (see Figure 2-4 ), the number of the lower mounting grooves 17 is the same as that of the stator core 2, and the two are clearance-matched, and the lower mounting grooves 17 are arranged above the lower flow channel 16, and the lower through hole 14 is located in the lower mounting grooves 17. The number of the lower mounting grooves 17 is the same as that of the stator core 2, and the lower through hole 14 is provided inside the lower mounting grooves 17, so that the coolant can be fully utilized to contact the bottom of the stator core 2, thereby avoiding the waste of the coolant and improving the utilization efficiency of the coolant.

[0029] In this embodiment, a plurality of upper mounting grooves 35 are formed in an annular array inside the upper cover plate 3 (see Figure 5-6 ), the number of the upper mounting grooves 35 is the same as that of the stator core 2, and the two are matched with each other, and the upper mounting grooves 35 are arranged below the upper flow channel 33, and the upper through hole 31 is located in the upper mounting grooves 35. The upper mounting grooves 35 and the lower mounting grooves 17 cooperate with each other to position and install the stator core assembly, which can prevent the stator core assembly from being separated during use; the number of the upper mounting grooves 35 is the same as that of the stator core 2, and the upper through hole 31 is provided in the upper mounting grooves 35, which can make full use of the coolant to contact the top of the stator core 2, avoid the waste of coolant, and improve the utilization efficiency of the coolant.

[0030] In this embodiment, the upper and lower parts of the stator core 2 protrude from the coil 4, and the protruding parts are respectively consistent with the depth of the lower mounting groove 17 and the upper mounting groove 35. That is, the upper and lower positions of the stator core assembly can be positioned, thereby further preventing the stator core assembly from being separated during use.

[0031] See also Figure 7 A positioning protrusion is arranged on the top of the lower baffle plate 13, and a positioning groove is arranged on the bottom of the upper baffle plate 34, and the positioning groove matches with the positioning protrusion. By installing and matching the positioning groove and the positioning protrusion, the sealing performance is improved, thereby ensuring the flow direction of the cooling oil.

[0032] In this embodiment, the lower baffle plate 13 is integrally formed with the stator housing 1, and the upper baffle plate 34 is integrally formed with the upper cover plate 3. From the production point of view, it is convenient to cast, and the service life of the lower baffle plate and the upper baffle plate can also be ensured.

[0033] Example 2

[0034] A disc motor includes the above disc motor cooling structure, wherein in two adjacent disc motor cooling structures, the liquid outlet of the upper disc motor cooling structure is connected to the liquid inlet of the lower disc motor cooling structure. Since the above disc motor cooling structure has the above beneficial effects, the disc motor including the disc motor cooling structure also has corresponding effects, which will not be elaborated here.

[0035] The above-mentioned disc motor is a single-stator disc motor, or a double-stator disc motor, or a multi-stator disc motor, which is not limited in the present application.

[0036] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A disc motor cooling structure, comprising a stator housing, a stator core and an upper cover plate, wherein a lower cavity is provided inside the stator housing, and an upper cavity is provided inside the upper cover plate, characterized in that: A coil is arranged outside the stator core to form a stator core assembly, and the stator core assembly is located inside the lower cavity of the stator shell and arranged in an annular array, a gap is left between the stator core assemblies, and the gap is used to connect the coolant, a liquid inlet and a liquid outlet are arranged on the stator shell, and the liquid inlet and the liquid outlet are connected with the lower cavity, and a lower baffle plate is also arranged inside the stator shell, and the lower baffle plate is located in the gap between the liquid inlet and the liquid outlet; a plurality of lower through holes and lower inlet and outlet holes are arranged in an annular array on the lower cavity of the stator shell, a lower flow channel of a U-shaped structure is arranged inside the lower cavity, and the lower through hole is located at the lower flow channel. The upper through hole is located at the bottom of the stator core, and the lower inlet and outlet holes are located at the outer ring of the lower cavity and are connected to the lower flow channel; a plurality of upper through holes and upper inlet and outlet holes are arranged in a circular array on the upper cavity of the upper cover plate, and an upper flow channel of a U-shaped structure is arranged inside the upper cavity, the upper through hole is located below the upper flow channel, and the two are connected to each other, the upper through hole is located at the top of the stator core, the upper inlet and outlet holes are located at the outer ring of the upper cavity, and are connected to the upper flow channel, an upper baffle plate is arranged inside the upper cavity of the upper cover plate, and after the stator shell and the upper cover plate are installed, the upper baffle plate corresponds to the lower baffle plate.

2. A disk motor cooling structure according to claim 1, characterized in that: The inner annular array of the stator housing is provided with a plurality of lower mounting grooves, the number of the lower mounting grooves is consistent with the number of the stator core, and the two are clearance-matched, and the lower mounting grooves are arranged above the lower flow channel, and the lower through holes are located in the lower mounting grooves.

3. A disk motor cooling structure according to claim 1, characterized in that: The inner annular array of the upper cover plate is provided with a plurality of upper mounting grooves, the number of the upper mounting grooves is consistent with the number of the stator core, and the two are clearance-matched, and the upper mounting grooves are arranged below the upper flow channel, and the upper through holes are located in the upper mounting grooves.

4. A disk-type motor cooling structure according to claim 2 or 3, characterized in that: The upper part and the lower part of the stator core protrude from the coil respectively, and the protruding parts are respectively consistent with the depth of the lower mounting groove and the upper mounting groove.

5. The disk motor cooling structure according to claim 1, characterized in that: A positioning protrusion is arranged on the top of the lower blocking plate, and a positioning groove is arranged on the bottom of the upper blocking plate, and the positioning groove matches with the positioning protrusion.

6. The disk-type motor cooling structure according to claim 1, characterized in that: The lower baffle plate is integrally formed with the stator housing, and the upper baffle plate is integrally formed with the upper cover plate. A disc motor, characterized in that: It comprises the disc motor cooling structure as claimed in any one of claims 1 to 6, wherein in two adjacent disc motor cooling structures, the liquid outlet of the upper disc motor cooling structure is communicated with the liquid inlet of the lower disc motor cooling structure.

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