A self-circulating water cooling structure for a disc motor in a water pump

Abstract

This invention relates to the field of motor technology, and more particularly to a self-circulating water cooling structure for a disc motor used in water pumps. The structure includes a motor housing, with a water pump housing coaxially and sealed to the side of the motor housing. It also includes a motor body installed inside the motor housing, with a rotating shaft coaxially and sealed to its output end, the shaft coaxially and sealed through both the motor housing and the water pump housing; and a water cooling mechanism including an impeller. A water inlet chamber is provided within the water pump housing. This invention, through the water cooling mechanism, allows the impeller to circulate water through a negative pressure chamber, water inlet chamber, water inlet hole, heat dissipation channel, and water outlet pipe. The heat dissipation channel is meandering and twisted, narrow in the middle and wide at the sides, increasing the complexity of the water flow path and flow state, thus improving heat dissipation efficiency. Furthermore, the meandering channel conforms to the position of the coil assembly within the stator disc, concentrating heat conduction and further enhancing the heat dissipation effect of the stator disc.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a self-circulating water cooling structure for a disc motor used in water pumps. Background Technology

[0002] Disc motors are characterized by short axial dimensions, compact structure, low rotor eddy current losses, small electromechanical time constant, and high power density, making them widely used in drive motors for transportation equipment and servo systems. However, high-power-density motors, due to their smaller size, have higher heat dissipation requirements than traditional motors. Existing disc motors typically employ a liquid-cooled structure on both the axial and circumferential surfaces to improve heat dissipation.

[0003] In existing technologies, the cooling channels are composed of multiple longitudinally distributed and sequentially connected water channel units. Another method involves setting up a cooling space on the housing of a disc motor, using reinforcing ribs to divide the cooling space into multiple fan-shaped cooling sub-spaces, and connecting adjacent cooling sub-spaces through connecting slots to form a cooling flow channel. Furthermore, the use of relatively arranged Y-shaped and strip-shaped separators ensures that the water flow channels within the cooling sub-spaces have the same width, resulting in uniform water flow. However, both of these methods have relatively short water flow paths and simple flow patterns, which are not conducive to improving heat dissipation efficiency. Additionally, they do not correspond to the coil groups within the stator disc of the motor, hindering targeted improvement of heat dissipation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing cooling channel structures, such as short water flow paths and simple flow states, which are not conducive to improving heat dissipation efficiency, and the failure to correspond with the coil group in the stator disk of the motor, which is not conducive to improving the heat dissipation effect in a targeted manner. Therefore, this invention proposes a self-circulating water cooling structure for a disc motor used in water pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A self-circulating water cooling structure for a disc motor of a water pump includes a motor housing, wherein a water pump housing is coaxially and sealed to the side of the motor housing, and further includes:

[0007] The motor body is installed inside the motor housing, and the output end is coaxially and fixedly connected to a rotating shaft, which coaxially and sealedly penetrates the motor housing and the water pump housing.

[0008] The water-cooling mechanism includes an impeller, a water inlet chamber inside the water pump housing, a heat dissipation frame fixedly connected to the side of the water pump housing away from the motor housing, a negative pressure chamber inside the heat dissipation frame, the water inlet chamber and the negative pressure chamber being interconnected and filled with water, the impeller being coaxially fixedly connected to a portion of the shaft located inside the water inlet chamber, the impeller output direction being from the negative pressure chamber to the water inlet chamber, a heat dissipation channel being provided on the side of the water pump housing near the motor housing, the heat dissipation channel being meandering and twisted, narrow in the middle and wide at both sides, the heat dissipation channel being in sealed contact with the motor body, a water inlet hole on the water pump housing connecting the water inlet chamber and the heat dissipation channel, and a water outlet pipe connecting the end of the heat dissipation channel away from the water inlet hole to the negative pressure chamber.

[0009] Preferably, the motor housing has a rotating cavity, and the motor body is installed inside the rotating cavity.

[0010] Preferably, the motor body includes a rotor disk and a stator disk. The rotor disk is coaxially and fixedly connected to a portion of the rotating shaft located in the rotating cavity. The stator disk is fixedly connected to the water pump housing, and a waterproof insulating gasket is sealed and fixedly connected between the stator disk and the water pump housing. The side of the waterproof insulating gasket away from the stator disk forms a heat dissipation channel with the water pump housing.

[0011] Preferably, the shape of the heat dissipation channel corresponds to the shape of the coil group in the stator disk.

[0012] Preferably, the water pump housing has multiple external mounting holes and internal mounting holes. The multiple external mounting holes are spaced apart on the outer periphery of the heat dissipation channel, and the multiple internal mounting holes are spaced apart on the inner periphery of the heat dissipation channel. The stator plate and the waterproof insulating pad are sealed and fixedly connected to the water pump housing through the multiple external mounting holes and internal mounting holes.

[0013] Preferably, the surface of the waterproof insulating pad is integrally formed with multiple rubber protrusions. The diameter of the rubber protrusions away from the waterproof insulating pad has a structure that is wider at the beginning and narrower at the end. The water pump housing located outside the heat dissipation channel has multiple arc grooves. The diameter of the multiple arc grooves is narrower at the beginning and wider at the end. The multiple rubber protrusions are one-to-one corresponding to the multiple arc grooves and are pressed and engaged.

[0014] Preferably, the plurality of rubber protrusions are one-to-one correspondences and spaced apart in the narrower region of the heat dissipation channel twist structure.

[0015] Preferably, a sealing ring is fixedly connected to the inner side of the motor housing, and the sealing ring is pressed against the waterproof insulating pad and the outer periphery of the stator disk.

[0016] Preferably, the heat sink is made of graphene.

[0017] Preferably, a sealed bearing for the rotating shaft is installed at the end of the heat dissipation frame away from the water pump housing, and a connecting bearing for the rotating shaft is installed between the heat dissipation frame and the water pump housing, and the water inlet chamber and the negative pressure chamber are connected to each other through the connecting bearing.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] 1. This invention incorporates a water-cooling mechanism. When the rotating shaft is driven, it drives the impeller to rotate, circulating water in the negative pressure chamber, water inlet chamber, water inlet hole, heat dissipation channel, and water outlet pipe. The water then transfers the heat generated by the rotation of the rotor and stator discs to the circulating water in the heat dissipation channel through heat conduction via a waterproof insulating pad, creating a circulating cooling effect. Furthermore, the heat dissipation channel is meandering and twisted, narrow in the middle and wide at both sides, increasing the complexity of the water flow path and flow state, thereby improving heat dissipation efficiency. In addition, the meandering and twisted channel fits the position of the coil group inside the stator disc, concentrating heat conduction and further improving the heat dissipation effect of the stator disc.

[0020] 2. This invention integrates rubber protrusions into the surface of the waterproof insulating pad, which deform and engage with the arc groove on the water pump housing, improving installation stability. Furthermore, the rubber protrusions are positioned in areas with narrower heat dissipation channels, where the pressure of water flowing through these narrower areas is slightly greater than in wider areas, thus specifically enhancing waterproofing. Compared to simply increasing the number of external and internal mounting holes on the waterproof insulating pad, this invention avoids excessive porosity that could damage the pad's structure, thereby extending its lifespan. Attached Figure Description

[0021] Figure 1 This is an overall isometric structural diagram of a self-circulating water cooling structure for a disc motor used in a water pump, as proposed in this invention.

[0022] Figure 2 This is a schematic diagram of the back structure of the water pump housing, which is a self-circulating water cooling structure for a disc motor used in water pumps, as proposed in this invention.

[0023] Figure 3 This is a schematic diagram showing the fit between the waterproof insulating gasket and the sealing ring in a self-circulating water cooling structure for a disc motor used in a water pump, as proposed in this invention.

[0024] Figure 4 This is a schematic diagram of the shaft and its connection structure of a disc motor self-circulating water cooling structure for a water pump proposed in this invention.

[0025] Figure 5 This is a schematic diagram of the rotor disc and stator disc structure of a self-circulating water cooling structure for a disc motor used in a water pump, as proposed in this invention.

[0026] Figure 6This is a schematic diagram of the overall half-section structure of a self-circulating water cooling structure for a disc motor used in a water pump, as proposed in this invention.

[0027] In the diagram: 1. Motor housing, 2. Water pump housing, 3. Shaft, 4. Heat sink frame, 5. Sealed bearing, 6. Circular groove, 7. Water outlet pipe, 8. Rotating cavity, 9. Water inlet cavity, 10. Negative pressure cavity, 11. Connecting bearing, 12. Rubber convex shape, 13. Rotor disc, 14. Stator disc, 15. Waterproof insulating pad, 16. Sealing ring, 17. Impeller, 18. Heat dissipation channel, 19. Water inlet hole, 20. External mounting hole, 21. Internal mounting hole. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Reference Figures 1-6 A self-circulating water cooling structure for a disc motor used in a water pump includes a motor housing 1, a water pump housing 2 coaxially and sealed to the side of the motor housing 1, and further includes:

[0030] The motor body is installed inside the motor housing 1, and the output end is coaxially and fixedly connected to the rotating shaft 3. The rotating shaft 3 coaxially and sealedly penetrates the motor housing 1 and the water pump housing 2.

[0031] A rotating cavity 8 is provided inside the motor housing 1, and the motor body is installed inside the rotating cavity 8.

[0032] The motor body includes a rotor disk 13 and a stator disk 14. The rotor disk 13 is coaxially and fixedly connected to a portion of the rotating shaft 3 located in the rotating cavity 8. The stator disk 14 is fixedly connected to the water pump housing 2, and a waterproof insulating pad 15 is sealed and fixedly connected between the stator disk 14 and the water pump housing 2. The side of the waterproof insulating pad 15 away from the stator disk 14 forms a heat dissipation channel 18 between it and the water pump housing 2.

[0033] The water cooling mechanism includes an impeller 17, a water inlet chamber 9 inside the water pump housing 2, a heat dissipation frame 4 fixedly connected to the side of the water pump housing 2 away from the motor housing 1, a negative pressure chamber 10 inside the heat dissipation frame 4, the water inlet chamber 9 and the negative pressure chamber 10 are interconnected and filled with water, the impeller 17 is coaxially fixedly connected to a portion of the rotating shaft 3 located inside the water inlet chamber 9, and the output direction of the impeller 17 is from the negative pressure chamber 10 to the water inlet chamber 9.

[0034] Reference Figure 2The water pump housing 2 has a heat dissipation channel 18 on the side near the motor housing 1. The heat dissipation channel 18 is meandering and twisted, and the twisted structure is narrow in the middle and wide on both sides. The heat dissipation channel 18 is in sealed contact with the motor body. The water pump housing 2 has a water inlet hole 19 that connects the water inlet cavity 9 and the heat dissipation channel 18. The end of the heat dissipation channel 18 away from the water inlet hole 19 is connected to the negative pressure cavity 10 by a water outlet pipe 7.

[0035] The shape of the heat dissipation channel 18 corresponds to that of the coil group in the stator disk 14.

[0036] The water pump housing 2 has multiple external mounting holes 20 and internal mounting holes 21. The multiple external mounting holes 20 are spaced apart on the outer periphery of the heat dissipation channel 18, and the multiple internal mounting holes 21 are spaced apart on the inner periphery of the heat dissipation channel 18. The stator plate 14 and the waterproof insulating pad 15 are sealed and fixedly connected to the water pump housing 2 through the multiple external mounting holes 20 and internal mounting holes 21.

[0037] The surface of the waterproof insulating pad 15 is integrally formed with multiple rubber round protrusions 12. The diameter of the rubber round protrusions 12 away from the waterproof insulating pad 15 is wide at the beginning and narrow at the end. Multiple arc grooves 6 are opened on the water pump housing 2 located outside the heat dissipation channel 18. The multiple arc grooves 6 point inward and have a diameter that is narrow at the beginning and wide at the end. The multiple rubber round protrusions 12 correspond one-to-one with the multiple arc grooves 6 and are squeezed and engaged.

[0038] Multiple rubber protrusions 12 correspond one-to-one and are spaced apart in the narrower area of ​​the twisted structure of the heat dissipation channel 18.

[0039] A sealing ring 16 is fixedly connected to the inner side of the motor housing 1. The sealing ring 16 is pressed against the waterproof insulating pad 15 and the outer periphery of the stator plate 14 to enhance the sealing performance and prevent water from flowing into the stator plate 14 from the gaps and causing damage to the device.

[0040] The heat dissipation frame 4 is made of graphene, which has excellent heat dissipation capabilities. The circulating water entering the heat dissipation frame 4 can dissipate heat into the air here.

[0041] A sealed bearing 5 for the rotating shaft 3 is installed at the end of the heat dissipation frame 4 away from the water pump housing 2. A connecting bearing 11 for the rotating shaft 3 is installed between the heat dissipation frame 4 and the water pump housing 2. The water inlet chamber 9 and the negative pressure chamber 10 are connected to each other through the connecting bearing 11.

[0042] In this invention, when the motor body is powered on, the rotor disk 13 starts to rotate, which drives the rotating shaft 3 to rotate, and the rotating shaft 3 drives the impeller 17 to rotate.

[0043] After the impeller 17 starts to rotate, it forms a vortex in the water inlet chamber 9, which generates suction in the negative pressure chamber 10, causing water in the negative pressure chamber 10 to enter the water inlet chamber 9, then enter the heat dissipation channel 18 through the water inlet hole 19, and finally return to the negative pressure chamber 10 through the water outlet pipe 7. The water circulates in this flow path. One side of the waterproof insulating pad 15 is in direct contact with the water in the heat dissipation channel 18, and the other side is in direct contact with the stator disk 14. The heat generated by the rotation of the rotor disk 13 and the stator disk 14 is transferred to the circulating water flow through heat conduction.

[0044] The winding and twisted design of the heat dissipation channel 18, which is narrow in the middle and wide on both sides, has the following advantages;

[0045] First: The winding and twisting design, like a mountain road, greatly extends the path of the water flow, allowing the water to fully contact the heat dissipation channel 18, thereby more effectively absorbing the heat generated by the stator plate 14 and improving the heat dissipation efficiency.

[0046] Second: The meandering and twisting channels make the flow of water more complex, forming turbulence. Water in turbulent flow can exchange heat better. Compared with laminar flow, its heat dissipation effect is more significant. Moreover, the structure that is narrow in the middle and wide on both sides will cause local acceleration and disturbance of the water flow at the point of change in width, further enhancing convective heat transfer and improving heat dissipation efficiency.

[0047] Third: The winding and twisting channel is exactly in line with the shape of the coil group, which is the source of heat generated when the stator disk 14 is working. It fits the position of the coil group, concentrates the heat conduction, and improves the heat dissipation effect of the stator disk 14.

[0048] The contact surface between the stator plate 14 and the water pump housing 2 is fixed by the external mounting hole 20 and the internal mounting hole 21 next to the heat dissipation channel 18. The positions of the external mounting hole 20 and the internal mounting hole 21 are just right to fix the area where water flows in the heat dissipation channel 18, reducing the risk of water leakage.

[0049] A rubber protrusion 12 is integrally formed on the surface of the waterproof insulating pad 15. The rubber protrusion 12 is wider at the beginning and narrower at the end. During installation, it fits perfectly with the arc groove 6 on the outer side of the heat dissipation channel 18, which is narrower at the beginning and wider at the end. The deformation of the rubber protrusion 12 is used to snap it into the arc groove 6, which not only improves the stability of the installation, but also the position of the rubber protrusion 12 is exactly in the narrower area of ​​the heat dissipation channel 18. The pressure of water flowing through the narrower area is slightly greater than that in the wider area, which specifically improves the waterproofing ability. Moreover, compared with simply increasing the number of external mounting holes 20 and internal mounting holes 21 on the waterproof insulating pad 15, it avoids the damage to the structure of the waterproof insulating pad 15 by too many holes, and improves the service life of the waterproof insulating pad 15.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-circulating water cooling structure for a disc motor used in a water pump, comprising a motor housing (1), wherein a water pump housing (2) is coaxially and sealed to the side of the motor housing (1), characterized in that, Also includes: The motor body is installed inside the motor housing (1), and the output end is coaxially fixedly connected to a rotating shaft (3). The rotating shaft (3) coaxially and sealed through the motor housing (1) and the water pump housing (2). The water cooling mechanism includes an impeller (17), an inlet chamber (9) is provided inside the water pump housing (2), a heat dissipation frame (4) is fixedly connected to the side of the water pump housing (2) away from the motor housing (1), a negative pressure chamber (10) is provided inside the heat dissipation frame (4), the inlet chamber (9) and the negative pressure chamber (10) are interconnected and filled with water, the impeller (17) is coaxially fixedly connected to a portion of the rotating shaft (3) located inside the inlet chamber (9), and the output direction of the impeller (17) is from the negative pressure chamber (10). The water pump housing (2) is provided with a heat dissipation channel (18) on the side near the motor housing (1). The heat dissipation channel (18) is meandering and twisted, and the twisted structure is narrow in the middle and wide on both sides. The heat dissipation channel (18) is in sealed contact with the motor body. The water pump housing (2) is provided with a water inlet hole (19) that connects the water inlet chamber (9) and the heat dissipation channel (18). The end of the heat dissipation channel (18) away from the water inlet hole (19) is connected to the negative pressure chamber (10) by a water outlet pipe (7). The motor housing (1) has a rotating cavity (8) inside, and the motor body is installed inside the rotating cavity (8); The motor body includes a rotor disk (13) and a stator disk (14). The rotor disk (13) is coaxially and fixedly connected to a portion of the rotating shaft (3) located in the rotating cavity (8). The stator disk (14) is fixedly connected to the water pump housing (2), and a waterproof insulating pad (15) is sealed and fixedly connected between the stator disk (14) and the water pump housing (2). The side of the waterproof insulating pad (15) away from the stator disk (14) forms a heat dissipation channel (18) between the water pump housing (2). The shape of the heat dissipation channel (18) corresponds to the shape of the coil group in the stator disk (14); The surface of the waterproof insulating pad (15) is integrally formed with multiple rubber round protrusions (12). The diameter of the rubber round protrusions (12) away from the waterproof insulating pad (15) is wide at first and then narrow. Multiple arc grooves (6) are opened on the water pump housing (2) located outside the heat dissipation channel (18). The diameter of the multiple arc grooves (6) pointing to their interior is narrow at first and then wide. The multiple rubber round protrusions (12) are squeezed and engaged with the multiple arc grooves (6) one by one. The multiple rubber protrusions (12) are one-to-one and spaced apart in the narrower region of the twisted structure of the heat dissipation channel (18).

2. The self-circulating water cooling structure for a disc motor used in a water pump according to claim 1, characterized in that, The water pump housing (2) has multiple external mounting holes (20) and internal mounting holes (21). The multiple external mounting holes (20) are spaced apart on the outer periphery of the heat dissipation channel (18), and the multiple internal mounting holes (21) are spaced apart on the inner periphery of the heat dissipation channel (18). The stator plate (14) and the waterproof insulating pad (15) are sealed and fixedly connected to the water pump housing (2) through the multiple external mounting holes (20) and internal mounting holes (21).

3. The self-circulating water cooling structure for a disc motor used in a water pump according to claim 1, characterized in that, A sealing ring (16) is fixedly connected to the inner side of the motor housing (1), and the sealing ring (16) is pressed against the waterproof insulating pad (15) and the outer periphery of the stator plate (14).

4. The self-circulating water cooling structure for a disc motor used in a water pump according to claim 1, characterized in that, The heat sink (4) is made of graphene.

5. The self-circulating water cooling structure for a disc motor used in a water pump according to claim 1, characterized in that, A sealing bearing (5) for the rotating shaft (3) is installed at the end of the heat dissipation frame (4) away from the water pump housing (2). A connecting bearing (11) for the rotating shaft (3) is installed between the heat dissipation frame (4) and the water pump housing (2). The water inlet chamber (9) and the negative pressure chamber (10) are connected to each other through the connecting bearing (11).

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