Motor cooling water channel structure

Abstract

This invention provides a motor cooling water channel structure, relating to the field of disc motors. The motor cooling water channel structure includes a motor housing, within which a stator assembly is installed. A support shaft is provided on one side wall of the motor housing. The stator support assembly includes a front support, a rear support, and an intermediate plate. The front and rear supports are respectively located on opposite sides of the intermediate plate. Support water channels are formed on the inner sides of both the front and rear supports, located at the front and rear disconnect slots near the core slot openings. An opening is provided at the edge of the intermediate plate, connecting the support water channels on the inner sides of the front and rear supports. The inlet and outlet ports at the shaft ends help reduce the size and weight of the motor. The split cooling water channel structure simplifies manufacturing. The stator support has front and rear disconnect slots, preventing the formation of closed loops around the core coil and thus avoiding eddy currents.

Description

Technical Field

[0001] This invention relates to the field of disc motor technology, specifically to a motor cooling water channel structure. Background Technology

[0002] A dual-rotor axial flux motor consists of one stator and two rotors. The stator is in the middle, and the rotors are on either side; both the stator and rotors are disc-shaped. Axial flux motors are also called disc motors, and their air gap magnetic field is distributed axially. During operation, the iron core and coils in the stator generate a large amount of heat, requiring a water channel structure on the stator to increase the motor's heat dissipation capacity. Existing technology, patent number CN216490056U, discloses a novel dual-rotor water-cooled motor. Its intermediate shaft is the output shaft, and the water inlet and outlet are located at the radial outer casing of the motor. This motor has the following disadvantages:

[0003] (1) The water channel of the above-mentioned motor is located outside the stator coil, and the inlet and outlet are located at the radial outer casing of the motor. The motor has a large diameter.

[0004] (2) The water channel of the aforementioned motor is located on the stator support, passing between two coils. This results in a low slot fill factor, reducing the motor's performance. Furthermore, the stator support is made of metal, forming a closed loop around the iron core coil, which generates eddy currents, causing greater losses and further reducing motor performance.

[0005] (3) The water channel is on the stator support. The stator support is integrally formed and can only be drilled in the radial direction, which makes processing difficult.

[0006] Currently, most mass-produced axial flux motors are single-rotor motors, with very few dual-rotor axial flux motors. The inlet and outlet of the motor's cooling water channels are generally located at the outer end of the radial housing, resulting in a relatively large motor diameter and weight, which is not conducive to miniaturization. Therefore, to address these shortcomings, this application proposes a motor cooling water channel structure. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a motor cooling water channel structure, which solves the problem.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: a motor cooling water channel structure, including a motor housing, a stator assembly installed inside the motor housing, a support shaft provided on one side wall of the motor housing, and the stator assembly including a stator support assembly and a coil wound on the stator support assembly;

[0009] The stator support assembly includes a front support, a rear support, and an intermediate plate. The intermediate plate is made of insulating material. The front support and the rear support are respectively disposed on both sides of the intermediate plate, and the three parts of the front support, the rear support, and the intermediate plate are clamped and fixed by pressure plates on both sides.

[0010] The stator support assembly has an inlet and an outlet on one side. The inner sides of the front and rear supports are provided with support water channels. The intermediate plate separates the support water channels on the inner sides of the front and rear supports. The support water channels are located at the front disconnect slot and the rear disconnect slot near the iron core slot. An opening is provided at the edge of the intermediate plate, which can connect the support water channels on the inner sides of the front and rear supports.

[0011] Preferably, the support shaft is provided with two water nozzle connectors, and the two water nozzle connectors are respectively connected to the water inlet and the water outlet.

[0012] Preferably, both the front support and the rear support have uniformly distributed iron core slots in the middle. The outer end of the iron core slot of the front support has a front disconnect slot, and the outer end of the iron core slot of the rear support has a rear disconnect slot. The front disconnect slot of the front support and the rear disconnect slot of the rear support are staggered. An insulating intermediate plate separates the front disconnect slot of the front support and the rear disconnect slot of the rear support.

[0013] Preferably, both the inlet and outlet are connected to the support waterway on one side.

[0014] Working principle: The motor coolant flows into the bracket water channel through one of the water inlets and the water outlet. After passing through the bracket water channel, the coolant enters the bracket water channel on the other side through the opening. Then the coolant flows back to the outlet and flows out through the other water inlet. When the coolant circulates in the front and rear brackets, it carries away the heat generated by the stator assembly, thus cooling the motor.

[0015] This invention provides a motor cooling water channel structure. It has the following beneficial effects:

[0016] 1. This invention uses an intermediate shaft as the support shaft, with the inlet and outlet at the shaft end. This makes the motor diameter smaller, which helps to reduce the size and weight of the motor.

[0017] 2. This invention utilizes a cooling water channel structure and allows for the installation of water inlets and outlets at the motor shaft end.

[0018] 3. In this invention, the cooling water channel structure is a split type, which makes production and processing simpler and more convenient.

[0019] 4. In this invention, the stator support has a front disconnect slot and a rear disconnect slot, and the front support and the rear support are separated by an intermediate plate. The winding core coil does not form a closed loop and will not generate eddy currents. Attached Figure Description

[0020] Figure 1 This is a side view of the stator assembly of the present invention;

[0021] Figure 2This is a front view of the stator assembly of the present invention;

[0022] Figure 3 This is a plan view of the support waterway of the present invention;

[0023] Figure 4 This is a perspective view of the motor housing of the present invention;

[0024] Figure 5 This is a perspective view of the stator support assembly of the present invention;

[0025] Figure 6 This is a perspective view of the front support of the present invention;

[0026] Figure 7 This is a schematic diagram of the front support of the present invention;

[0027] Figure 8 This is a perspective view of the rear support of the present invention.

[0028] Among them, 1. Motor housing; 21. Stator assembly; 22. Stator support assembly; 24. Water nozzle connector; 221. Front support; 222. Rear support; 223. Intermediate plate; 224. Pressure plate; 225. Iron core slot; 226. Front disconnect slot; 227. Rear disconnect slot; 3. Support shaft; 31. Water inlet; 32. Water outlet; 33. Support water channel; 34. Opening. Detailed Implementation

[0029] 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.

[0030] Example:

[0031] like Figure 1-8 As shown, an embodiment of the present invention provides a motor cooling water channel structure, including a motor housing 1, a stator assembly 21 installed inside the motor housing 1, a support shaft 3 provided on one side wall of the motor housing 1, and the stator assembly 21 including a stator support assembly 22 and a coil wound on the stator support assembly 22.

[0032] The stator support assembly 22 includes a front support 221, a rear support 222, and an intermediate plate 223. The intermediate plate 223 is made of insulating material, while the front support 221 and the rear support 222 are both made of metal. The front support 221 and the rear support 222 are respectively located on both sides of the intermediate plate 223, and the three parts of the front support 221, the rear support 222, and the intermediate plate 223 are clamped and fixed by pressure plates 224 on both sides. The pressure plates 224 are used to install the front support 221, the rear support 222, and the intermediate plate 223 by bolts, thus ensuring good fixation.

[0033] Two water nozzle connectors 24 are provided on the support shaft 3. The two water nozzle connectors 24 are connected to the inlet 31 and the outlet 32 ​​respectively. The stator support assembly 22 has an inlet 31 and an outlet 32 ​​on one side. The inner sides of the front support 221 and the rear support 222 are both provided with support water channels 33. The intermediate plate 223 separates the support water channels 33 on the inner sides of the front support 221 and the rear support 222. The support water channels 33 are located at the front disconnect slot 226 and the rear disconnect slot 227 near the iron core slot 225. The edge of the intermediate plate 223 is provided with openings. Hole 34 connects the bracket water channel 33 inside the front bracket 221 and the rear bracket 222. The motor coolant flows into the bracket water channel 33 through one of the water nozzles 24 and the inlet 31. The coolant then enters the other bracket water channel 33 through the hole 34. After that, the coolant flows back to the outlet 32 ​​and then flows out through the other water nozzle 24. When the coolant circulates fully in the front bracket 221 and the rear bracket 222, it carries away the heat generated by the stator assembly 21 during operation, thus achieving motor cooling.

[0034] Both the front support 221 and the rear support 222 have iron core slots 225 evenly distributed in the middle. The outer end of the iron core slot 225 of the front support 221 has a front disconnect slot 226, and the outer end of the iron core slot 225 of the rear support 222 has a rear disconnect slot 227. The front disconnect slot 226 of the front support 221 and the rear disconnect slot 227 of the rear support 222 are staggered. The front disconnect slot 226 of the front support 221 and the rear disconnect slot 227 of the rear support 222 are separated by an insulating intermediate plate 223 to prevent the support from forming a closed loop around the iron core and generating eddy currents.

[0035] Both the inlet 31 and the outlet 32 ​​are connected to the support channel 33 on one side, which facilitates the full flow of coolant to cool the motor.

[0036] In summary, the intermediate shaft of the motor serves as the supporting structure for the motor. The inlet 31 and outlet 32 ​​of the motor cooling bracket water channel 33 are located at the shaft end, with a relatively small diameter. This structure is advantageous for placement on the hub, making it suitable for a hub motor. If the coolant flows from the inlet 31 into the stator bracket water channel 33, it will flow from one side of the stator bracket water channel 33 through the insulating intermediate plate 223 to the other side, finally flowing back to the outlet 32. The stator bracket contains multiple water channel loops for cooling the motor stator.

[0037] The stator assembly 21 is located between the iron core and the coil, and does not occupy the radial space of the iron core and the coil, resulting in a higher slot fill factor for the motor.

[0038] Both the front bracket 221 and the rear bracket 222 are made of metal. The iron core slot 225 has a front disconnect slot 226 and a rear disconnect slot 227. The front bracket 221 and the rear bracket 222 are separated by an insulating plate. Eddy currents will not be formed at the stator bracket assembly 22, which is beneficial to improving motor performance.

[0039] The bracket water channel 33 and the front and rear stator water channels have openings 34 at the connection of the middle insulation plate to connect the water channels, so that the motor can form one or more unidirectional cooling circuits, which is beneficial to the heat dissipation of the motor.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor cooling water channel structure, comprising a motor housing (1), wherein a stator assembly (21) is installed inside the motor housing (1), and a support shaft (3) is provided on one side wall of the motor housing (1), characterized in that: The stator assembly (21) includes a stator support assembly (22) and a coil wound on the stator support assembly (22); The stator support assembly (22) includes a front support (221), a rear support (222), and an intermediate plate (223). The intermediate plate (223) is made of insulating material. The front support (221) and the rear support (222) are respectively disposed on both sides of the intermediate plate (223), and the three parts of the front support (221), the rear support (222), and the intermediate plate (223) are clamped and fixed by pressure plates (224) on both sides. The stator support assembly (22) has an inlet (31) and an outlet (32) on one side. The front support (221) and the rear support (222) both have support water channels (33) on their inner sides. The intermediate plate (223) separates the support water channels (33) on the inner sides of the front support (221) and the rear support (222). The support water channels (33) are located at the front disconnect slot (226) and the rear disconnect slot (227) near the iron core slot (225). The intermediate plate (223) has an opening (34) at its edge. The opening (34) can connect the support water channels (33) on the inner sides of the front support (221) and the rear support (222).

2. The motor cooling water channel structure according to claim 1, characterized in that: Two water tap connectors (24) are provided on the support shaft (3), and the two water tap connectors (24) are respectively connected to the inlet (31) and the outlet (32).

3. The motor cooling water channel structure according to claim 1, characterized in that: Both the front support (221) and the rear support (222) have uniformly distributed iron core slots (225) in the middle. The outer end of the iron core slot (225) of the front support (221) is provided with a front disconnect slot (226), and the outer end of the iron core slot (225) of the rear support (222) is provided with a rear disconnect slot (227). The front disconnect slot (226) of the front support (221) and the rear disconnect slot (227) of the rear support (222) are staggered. An insulating intermediate plate 223 separates the front disconnect slot (226) of the front support (221) and the rear disconnect slot (227) of the rear support (222).

4. The motor cooling water channel structure according to claim 1, characterized in that: Both the inlet (31) and outlet (32) are connected to the support waterway (33) on one side.

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