Motor integrated with heat dissipation system

Abstract

The invention relates to the field of motor heat dissipation systems, in particular to a motor integrated with a heat dissipation system, which comprises a motor body, a stator assembly arranged in the motor body, and a rotor assembly arranged in the stator assembly, a plurality of through air holes are formed in the position, away from the winding, of the surface of the stator assembly, heat conduction air pipes are arranged in the air holes, the air inlet ends of the heat conduction air pipes are connected with heat insulation plates, and air inlets are formed between the air inlet ends of the heat conduction air pipes and the heat insulation plates. The air outlet end of the heat conduction air pipe penetrates through the outer surface of the motor body. Heat generated in the stator is transferred through the heat conduction air pipe penetrating through the stator assembly, the transferred heat can be blown to the outside along with airflow in the flow guide air pipe, and therefore the function of enhancing heat dissipation of the internal structure is achieved.

Description

Technical Field

[0001] The present invention relates to the field of motor heat dissipation systems, and in particular to a motor with an integrated heat dissipation system. Background Art

[0002] A motor generally refers to an electromagnetic device that realizes electrical energy conversion or transmission based on the law of electromagnetic induction. With the development of technology, the structure of motors has become more diverse. For a synchronous reluctance motor, there is no winding wrapped around the surface of its internal rotor, but only a plurality of stacked steel sheets. The stacked steel sheets are cylindrical and have several air magnetic barrier slots on the surface.

[0003] In order to improve the protection level of the motor, it is usually necessary to ensure the sealing of the internal structure, that is, the surface of the motor cover cannot be opened for heat dissipation, which results in the airflow being unable to enter the motor to provide heat dissipation for the internal structure. When the motor is in an abnormal operating state, such as the internal structure is offset or the winding is twisted, the winding may generate a lot of heat. Because the winding is in a fixed state, the heat cannot dissipate quickly, which will seriously affect the normal use of the motor. Summary of the invention

[0004] The present invention aims at the deficiencies in the prior art and provides the following technical solutions:

[0005] The motor with integrated heat dissipation system comprises a motor body, a stator assembly arranged inside the motor body, a winding wound on the inner wall of the stator assembly, and a rotor assembly arranged inside the stator assembly.

[0006] Specifically, a plurality of penetrating air holes are opened on the surface of the stator assembly away from the winding, a heat-conducting air pipe is arranged inside the air hole, an air inlet end of the heat-conducting air pipe is connected to a heat insulation board, an air inlet is provided between the air inlet end of the heat-conducting air pipe and the heat insulation board, and an air outlet end of the heat-conducting air pipe penetrates to the outer surface of the motor body.

[0007] The heat generated inside the stator is transferred through the heat-conducting air duct that runs through the stator assembly. The transferred heat can be blown to the outside along the air flow inside the heat-conducting air duct, thereby achieving the function of strengthening the heat dissipation of the internal structure.

[0008] As an improvement of the above technical solution, the motor body includes a protective shell and a front cover and a rear cover arranged at both ends of the protective shell, a central axis penetrating the front cover is arranged inside the protective shell, the other end of the central axis is rotatably connected to the inner wall of the rear cover, and a sealing plate is detachably connected to one end of the protective shell close to the rear cover, the heat insulation plate is fixed to the surface of the sealing plate, a partition cavity is present between the heat insulation plate and the sealing plate, and fans are fixed to the outside of both ends of the central axis.

[0009] The drive board is fixed on the heat insulation board, and the heat insulation board is used to separate the motor stator / rotor and the electronic drive board to prevent the heat generated between the two from affecting each other.

[0010] As an improvement of the above technical solution, the air inlet end of the heat-conducting air pipe is detachably connected with a positioning portion, the other end of the positioning portion is threadedly fixed to the surface of the insulation board, the air outlet end of the heat-conducting air pipe is detachably connected with an air outlet portion, the air inlet end of the heat-conducting air pipe is fixed with a deformable air inlet portion, the air outlet portion penetrates the surface of the protective shell, and the air inlet portion fits the surface of the insulation board.

[0011] The driving board can be attached to the surface of the heat insulation board through the air inlet part, so that the heat on the surface of the driving board can be transferred to the air inlet part, and the heat sent from the air inlet part can be transferred to the outside through the air outlet part, so as to achieve the purpose of sufficient heat dissipation.

[0012] As an improvement of the above technical solution, the rotor assembly includes a plurality of silicon steel laminations stacked in a columnar shape, a plurality of penetrating magnetic barrier grooves are provided on the surface of the silicon steel laminations, the magnetic barrier grooves are arc-shaped, and a groove is provided on the inner wall of the magnetic barrier groove near the center of the silicon steel laminations, and a fastener is arranged inside the groove.

[0013] The fasteners are used to strengthen the fastening effect of the silicon steel laminations, enhance the axial stability of the silicon steel laminations, and prevent the silicon steel laminations from axial deflection.

[0014] As an improvement of the above technical solution, the fastener includes a positioning plate, the positioning plate passes through both ends of the groove, and both ends of the central axis are threadedly connected with sleeves, and the sleeves are tightened to limit the positioning plate.

[0015] The deflection of the silicon steel laminations is limited by the positioning plate, and the positioning plate is squeezed by the shaft sleeve, so that the positioning plate structure is stable and deviation is avoided.

[0016] As an improvement of the above technical solution, the magnetic barrier grooves are divided into several groups, and the magnetic barrier grooves of the several groups are evenly distributed in a ring shape on the surface of the rotor assembly, each group has several nested magnetic barrier grooves, and the magnetic barrier grooves of each group are equidistantly arranged. A positioning ring is arranged between the sleeve and the rotor assembly, and several protrusions are arranged on the outer side of the positioning ring. The other end of the protrusion is connected to a limiting portion, and the limiting portion is clamped with a positioning plate.

[0017] The position restriction of the positioning plate structure is further strengthened by the positioning ring to further ensure the stability of the structure.

[0018] As an improvement of the above technical solution, the positioning plates are two steel plates with an L-shaped cross-section, and a T-shaped groove is separated between the two steel plates. After the positioning plates are inserted into the interior of the groove, both ends of the positioning plates extend beyond the coverage of the groove, and the limiting portion is T-shaped, and the limiting portion and the T-shaped groove formed by the positioning plate are interference fit.

[0019] The stability of the structure is further enhanced by the T-slot, which ensures the tight connection between the structures and facilitates subsequent disassembly.

[0020] As an improvement of the above technical solution, a support base is provided at the bottom of the protective shell, and the support base is in a "J" shape.

[0021] The support base with a cross-shaped structure can ensure the supporting stability of the motor body to the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the front view of the overall structure of the present invention;

[0023] Figure 2 An exploded view of the present invention;

[0024] Figure 3 for Figure 2 A structural diagram of the rear view perspective;

[0025] Figure 4 for Figure 2 The enlarged structure diagram at A in the middle;

[0026] Figure 5 for Figure 2 The enlarged structure diagram at B in the middle;

[0027] Figure 6 for Figure 2 The enlarged structure diagram at C in the middle;

[0028] Figure 7 for Figure 3 Enlarged structural diagram at point D in the middle.

[0029] Figure numerals: 10, motor body; 11, protective shell; 111, stator assembly; 1111, air hole; 112, rotor assembly; 1121, magnetic barrier slot; 1122, groove; 12, front cover; 13, rear cover; 14, center axis; 141, positioning ring; 142, protrusion; 143, limit portion; 144, positioning plate; 145, bushing; 155, air inlet; 15, sealing plate; 151, heat insulation plate; 152, positioning portion; 153, heat-conducting air pipe; 154, air outlet; 16, support seat. DETAILED DESCRIPTION

[0030] 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 embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] Existing synchronous reluctance motors need to ensure their motor protection level in some usage environments, that is, the surface of the motor cover cannot have holes for heat dissipation. In this case, when the motor is in an abnormal operating state, such as when the internal structure is offset or the winding is twisted, the winding may generate a lot of heat. Because the winding is in a fixed state, the heat cannot dissipate quickly, which will seriously affect the normal use of the motor.

[0032] To resolve this issue, see Figure 1-7 , provides a motor with an integrated heat dissipation system, including a motor body 10, and also including: a stator assembly 111 arranged inside the motor body 10, a winding wound on the inner wall of the stator assembly 111, and a rotor assembly 112 arranged inside the stator assembly 111.

[0033] Specifically, a plurality of penetrating air holes 1111 are provided on the surface of the stator assembly 111 away from the winding, a heat-conducting air pipe 153 is provided inside the air hole 1111, an air inlet end of the heat-conducting air pipe 153 is connected to a heat insulation plate 151, an air inlet is provided between the air inlet end of the heat-conducting air pipe 153 and the heat insulation plate 151, and an air outlet end of the heat-conducting air pipe 153 penetrates to the outer surface of the motor body 10.

[0034] The drive board of the motor is installed on the surface of the heat insulation board 151. The chip of the drive board will generate a certain amount of heat when working. In order to prevent this heat from affecting the rotor assembly 112 and the stator assembly 111 of the motor, the two are separated by the heat insulation board 151, and then the heat-conducting air pipe 153 is used to contact the heating position of the chip of the drive board. In this way, fans are generally installed at both ends of the rotor assembly 112. One side is used for air intake, so that the airflow enters the rotor assembly 112 to form an induced magnetic field inside the rotor assembly 112 to generate magnetic resistance torque. The air intake on the other side is used to cool the drive board. The airflow drives the cooling When the plate is installed, the airflow will no longer circulate inside the motor cover, but will be discharged to the outside of the motor body 10 along the heat-conducting air pipe 153. Since the airflow will not be accumulated inside the motor cover, the temperature of the airflow flowing in at one end of the driving plate is not high, and it will enter the interior of the stator assembly 111 during the flow. When the winding part of the stator assembly 111 generates heat, the heat will be transferred to the airflow through the inner wall of the heat-conducting air pipe 153, and the heat will flow to the outside along the internal airflow to achieve the purpose of cooling. A single heat-conducting air pipe 153 is used to cool down and guide the gas at two positions, thereby reducing the operating temperature of the motor.

[0035] In one embodiment, see Figure 2 , 3 7. The motor body 10 includes a protective shell 11 and a front cover 12 and a rear cover 13 arranged at both ends of the protective shell 11. A central axis 14 penetrating the front cover 12 is arranged inside the protective shell 11. The other end of the central axis 14 is rotatably connected to the inner wall of the rear cover 13. A sealing plate 15 is detachably connected to one end of the protective shell 11 close to the rear cover 13. A heat insulation plate 151 is fixed to the surface of the sealing plate 15. A partition cavity exists between the heat insulation plate 151 and the sealing plate 15. Fans are fixed to the outer sides of both ends of the central axis 14.

[0036] The internal structure is positioned by the central axis 14, such as Figure 2 As shown, there are two fans at both ends of the central axis 14, which are used to take in air. Since the fans do not have independent power, they rotate synchronously with the central axis 14. When combined with the aforementioned technical solution, they can rotate at a lower speed under low torque. This method generates a slower airflow speed and a slower heat transfer speed.

[0037] In one embodiment, see Figure 3 and Figure 7 The air inlet end of the heat-conducting air pipe 153 is detachably connected to the positioning portion 152, and the other end of the positioning portion 152 is threadedly fixed to the surface of the heat insulation board 151. The air outlet end of the heat-conducting air pipe 153 is detachably connected to the air outlet portion 154. The air inlet end of the heat-conducting air pipe 153 is fixed with a deformable air inlet portion 155. The air outlet portion 154 penetrates the surface of the protective shell 11, and the air inlet portion 155 adheres to the surface of the heat insulation board 151.

[0038] Since the driving board is to be fixed on the heat insulation board 151, the air inlet 155 is attached to the heat insulation board 151, so that it can be attached to the surface of the driving board for heat conduction. The position is adjusted according to the driving boards of different specifications, and the inlet position of the air inlet 155 is changed by stretching the air inlet 155 to produce deformation, so as to achieve the purpose of attaching to the surface of the driving board for heat conduction and taking in air at the inlet position of the air inlet 155. Since the heat is transferred to the surface of the air inlet 155, when the air flow flows from the inside of the air inlet 155, it will take away part of the heat. When the winding of the stator assembly 111 generates heat, its heat is transferred to the stator assembly 111. When the air flow enters the heat-conducting air pipe 153, it will take away the heat inside the stator assembly 111, forming a cooling function. It can not only avoid the heat generated by the winding and the heat generated by the driving board from affecting each other and causing the problem of internal heat accumulation, but also can directly guide the hot air flow to the outside to enhance the heat dissipation effect.

[0039] The synchronous reluctance motor disclosed in the prior art usually has a sleeve 145 disposed on the outside of the central shaft 14, and the sleeve 145 connected by thread is tightened to squeeze the silicon steel laminations inside, so that the position of the silicon steel laminations is fixed. However, when the torque is too large, there may be a slight angular offset between the silicon steel laminations, which may cause the risk of motor damage. To solve this problem, please refer to Figure 2 and Figure 6 The rotor assembly 112 includes a plurality of silicon steel laminations stacked in a columnar shape. A plurality of penetrating magnetic barrier grooves 1121 are provided on the surface of the silicon steel lamination. The magnetic barrier grooves 1121 are arc-shaped. A groove 1122 is provided on the inner wall of the magnetic barrier groove 1121 near the center of the silicon steel lamination. A fastener is arranged inside the groove 1122.

[0040] The cooperation between the groove 1122 and the fastener forms a limit on the axial deflection of the silicon steel lamination, which can always provide a fastening effect when the fastener is not damaged, and ensure the stability of the structure without affecting the change of the internal magnetic field.

[0041] In one embodiment, see Figure 2 , 5 6. The fastener includes a positioning plate 144 , which passes through both ends of the groove 1122 . Both ends of the central axis 14 are threadedly connected with shaft sleeves 145 , which are tightened to limit the positioning plate 144 .

[0042] Specifically, the fastener is configured as a positioning plate 144 , and the positioning plate 144 penetrates the groove 1122 to form a position limit on the axial rotation of the silicon steel lamination, thereby ensuring the stability of the structure.

[0043] For further information, see Figure 2 , 5 6. The magnetic barrier grooves 1121 are divided into several groups. The several groups of magnetic barrier grooves 1121 are evenly distributed in a ring shape on the surface of the rotor assembly 112. Each group has several nested magnetic barrier grooves 1121. Each group of magnetic barrier grooves 1121 is equidistantly arranged. A positioning ring 141 is arranged between the shaft sleeve 145 and the rotor assembly 112. Several protrusions 142 are arranged on the outer side of the positioning ring 141. The other end of the protrusion 142 is connected to the limiting portion 143, and the limiting portion 143 is clamped with the positioning plate 144.

[0044] The positioning ring 141 is squeezed by the shaft sleeve 145, and the squeezed positioning ring 141 squeezes the silicon steel laminates together, and then the limiting portion 143 provides a position limit for the positioning plate 144, so that the positioning plate 144 can always be inside the groove 1122, ensuring that the positioning plate 144 can always limit the silicon steel laminates, thereby enhancing the stability of the positioning plate 144.

[0045] In one embodiment, see Figure 2 , 5 6. The positioning plate 144 is two steel plates with an L-shaped cross-section, and a T-shaped groove is separated between the two steel plates. After the positioning plate 144 is inserted into the interior of the groove 1122, both ends of the positioning plate 144 exceed the coverage of the groove 1122, and the limiting portion 143 is T-shaped, and the T-shaped groove formed by the limiting portion 143 and the positioning plate 144 is interference fit.

[0046] The T-shaped groove 1122 is used to limit the L-shaped steel plate, and the L-shaped steel plate can also limit the silicon steel lamination with the groove 1122 to form a stable connection structure. Combined with the interference fit limit portion 143 and the positioning plate 144, a stable connection structure can be formed to ensure the stability of each structure in the motor rotor assembly 112 and prevent the internal silicon steel lamination from axial displacement.

[0047] In one embodiment, see Figure 1 A support base 16 is provided at the bottom of the protective shell 11, and the support base 16 is in a "J" shape. The support base 16 in the "J" shape provides stability on both sides. When installation is required, holes can be opened on the two side branches of the support base 16 and fixed with bolts.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A motor with an integrated heat dissipation system, comprising a motor body (10), characterized in that: Also includes: A stator assembly (111) is arranged inside the motor body (10), and a winding is wound on the inner wall of the stator assembly (111); and A rotor assembly (112) disposed inside the stator assembly (111); A plurality of penetrating air holes (1111) are provided on the surface of the stator assembly (111) at a position away from the winding, a heat-conducting air pipe (153) is provided inside the air hole (1111), an air inlet end of the heat-conducting air pipe (153) is connected to a heat insulation board (151), an air inlet is provided between the air inlet end of the heat-conducting air pipe (153) and the heat insulation board (151), and an air outlet end of the heat-conducting air pipe (153) penetrates to the outer surface of the motor body (10).

2. The motor with integrated heat dissipation system according to claim 1, characterized in that: The motor body (10) comprises a protective shell (11) and a front cover (12) and a rear cover (13) arranged at both ends of the protective shell (11); a central axis (14) penetrating the front cover (12) is arranged inside the protective shell (11); the other end of the central axis (14) is rotatably connected to the inner wall of the rear cover (13); one end of the protective shell (11) close to the rear cover (13) is detachably connected to a sealing plate (15); the heat insulation plate (151) is fixed to the surface of the sealing plate (15); a partition cavity exists between the heat insulation plate (151) and the sealing plate (15); fans are fixed to the outer sides of both ends of the central axis (14).

3. The motor with integrated heat dissipation system according to claim 2, characterized in that: The air inlet end of the heat-conducting air pipe (153) is detachably connected to a positioning portion (152), the other end of the positioning portion (152) is threadedly fixed to the surface of the heat insulation board (151), the air outlet end of the heat-conducting air pipe (153) is detachably connected to an air outlet portion (154), the air inlet end of the heat-conducting air pipe (153) is fixed with a deformable air inlet portion (155), the air outlet portion (154) penetrates the surface of the protective shell (11), and the air inlet portion (155) is in contact with the surface of the heat insulation board (151).

4. The motor with integrated heat dissipation system according to claim 2, characterized in that: The rotor assembly (112) comprises a plurality of silicon steel laminations stacked in a columnar shape, a plurality of penetrating magnetic barrier grooves (1121) are provided on the surface of the silicon steel lamination, the magnetic barrier grooves (1121) are arc-shaped, a groove (1122) is provided on the inner wall of the magnetic barrier groove (1121) near the center of the silicon steel lamination, and a fastener is arranged inside the groove (1122).

5. The motor with integrated heat dissipation system according to claim 4, characterized in that: The fastener comprises a positioning plate (144), the positioning plate (144) passes through both ends of the groove (1122), and both ends of the central shaft (14) are threadedly connected with shaft sleeves (145), and the shaft sleeves (145) are tightened to limit the positioning plate (144).

6. The motor with integrated heat dissipation system according to claim 5, characterized in that: The magnetic barrier grooves (1121) are divided into a plurality of groups. The plurality of groups of magnetic barrier grooves (1121) are evenly distributed in a ring shape on the surface of the rotor assembly (112). Each group has a plurality of nested magnetic barrier grooves (1121). Each group of magnetic barrier grooves (1121) are arranged at equal intervals. A positioning ring (141) is arranged between the shaft sleeve (145) and the rotor assembly (112). The outer side of the positioning ring (141) is provided with a plurality of protrusions (142). The other end of the protrusion (142) is connected to a limiting portion (143). The limiting portion (143) is clamped with a positioning plate (144).

7. The motor with integrated heat dissipation system according to claim 6, characterized in that: The positioning plate (144) is two steel plates with an L-shaped cross-section, and a T-shaped groove is separated between the two steel plates. After the positioning plate (144) is inserted into the interior of the groove (1122), both ends of the positioning plate (144) exceed the coverage of the groove (1122), and the limiting portion (143) is T-shaped, and the T-shaped groove formed by the limiting portion (143) and the positioning plate (144) is interference fit.

8. The motor with integrated heat dissipation system according to claim 2, characterized in that: A support seat (16) is provided at the bottom of the protective shell (11), and the support seat (16) is in the shape of a "J".

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