Self-heat-dissipation high-power-density water pump motor

Abstract

The invention relates to the technical field of water pump motors, in particular to a self-heat-dissipation high-power-density water pump motor which comprises a rotor assembly, a stator assembly and a shell assembly, the rotor assembly and the stator assembly are arranged in the shell assembly, the rotor assembly is arranged on the inner side of the stator assembly, and the stator assembly is arranged on the outer side of the shell assembly. A cooling groove structure is arranged between the shell assembly and the stator assembly; when the water pump motor is used, the rotor assembly and the stator assembly are installed on the shell assembly according to installation requirements, the water pump motor is started, and cooling water penetrates through the cooling groove structure under the action of pressure difference, so that the rotor assembly, the stator assembly and the shell assembly are cooled, and the self-heat-dissipation function is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of water pump motors, and in particular to a water pump motor with self-heat dissipation and high power density. Background Art

[0002] With the increasing requirements for energy conservation and environmental protection, motors as key power sources must also meet the standards of high efficiency and low energy consumption. The advantages of brushless DC motors, such as low noise, long life, no spark interference, and convenient centralized control, fully meet these requirements. With the increasing maturity of its speed regulation technology and higher cost performance, its structural manufacturing process must also be improved accordingly.

[0003] A brushless motor is a motor without carbon brushes and commutators. It drives the rotor to rotate by controlling the current in the coil through an electronic controller. It uses a set of electronic devices to sense the position of the permanent magnet poles through Hall elements or coil back electromotive force. Based on this perception, it uses electronic circuits to switch the direction of the current in the coil in a timely manner to ensure that the magnetic force in the correct direction is generated to drive the motor. Since there is no carbon brush friction, the brushless motor has a longer life, higher efficiency and lower noise. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a self-heating, high-power-density water pump motor that improves power density, has an automatic heat dissipation function during operation, can reduce the volume of the pump, and can meet the needs of severe overload conditions.

[0005] A self-heating, high-power-density water pump motor of the present invention comprises a rotor assembly, a stator assembly and a housing assembly, wherein the rotor assembly and the stator assembly are respectively arranged inside the housing assembly, the rotor assembly is on the inner side of the stator assembly, and a cooling groove structure is arranged between the housing assembly and the stator assembly; when in use, the rotor assembly and the stator assembly are installed on the housing assembly according to the installation requirements, and the water pump motor is started, and cooling water passes through the cooling groove structure under the action of the pressure difference, thereby cooling the rotor assembly, the stator assembly and the housing assembly, thereby realizing the function of self-heating.

[0006] Preferably, the rotor assembly includes a rolling bearing, an impeller upper cover, an impeller lower cover, a rotor core, a permanent magnet and a pin, the permanent magnet is placed inside the rotor core and fixed by the pin, the permanent magnet, the impeller lower cover and the rolling bearing are formed as a whole by injection molding, the whole is connected to the impeller upper cover by welding, and the permanent magnet is an annular block type; the rotor assembly is composed of a rolling bearing, an impeller upper cover, an impeller lower cover, a rotor core, a permanent magnet and a pin, the rotor assembly is fixedly connected to the magnetic tile, by adopting an annular block type permanent magnet, the magnetization direction is circumferential, the axial effective area is significantly increased compared with ordinary motors, and the volume of the magnetic tile is small, so it has a larger power density.

[0007] Preferably, the housing assembly includes a pump upper shell, a fixed shaft and a pump lower shell, the fixed shaft is injection-moldedly connected to the pump lower shell, the rotor assembly is placed on the fixed shaft with the cooperation of a gasket, the top cover of the pump lower shell is equipped with the pump upper shell, the pump upper shell and the pump lower shell are ultrasonically welded, the nut is connected to the fixed shaft, and the pump upper shell and the pump lower shell are assembled; the pump upper shell and the pump lower shell are ultrasonically welded, the permanent magnet and the iron core are fixed by pins, and then, together with the sliding bearing, the impeller lower cover is integrally molded to improve the connection sealing and convenience.

[0008] Preferably, the stator assembly includes a stator core, a winding frame, a casing, motor terminals, a PCB board, casing terminals and a bottom cover, the stator core and the casing are formed as one piece by injection molding, the winding frame is injection molded on the casing, three groups of motor terminals are interference fit onto the back of the casing, the wire is wound on the winding frame, the free ends of the wires pass through the casing and are hung inside the three groups of motor terminals, the PCB board is installed on the back of the casing with the cooperation of the positioning columns, the fixed shaft is injection molded to the lower casing of the pump, and the bottom cover is assembled on the casing with the cooperation of the casing terminals.

[0009] Preferably, it further comprises a waterproof sleeve and a rubber ring, wherein the waterproof sleeve is sleeved on the stator assembly, and a rubber ring is arranged between the waterproof sleeve and the stator assembly; the waterproof sleeve and the rubber ring cooperate with each other to waterproof and seal the stator assembly, thereby improving the sealing performance.

[0010] Preferably, the cooling trough structure is composed of a circulating water inlet, a pressure water chamber, a circulating flow channel and a circulating water outlet, the pump upper shell is provided with a circulating water inlet and a pressure water chamber, the stator iron core is provided with a circulating flow channel, the pump upper shell is provided with a circulating water outlet, the circulating water inlet is communicated with the pressure water chamber, the pressure water chamber is communicated with the circulating flow channel, and the circulating flow channel is communicated with the circulating water outlet; when in use, the impeller composed of the impeller upper cover and the impeller lower cover rotates rapidly, and the circulating water enters the pressure water chamber through the circulating water inlet, the circulating water is thrown out of the pressure water chamber and the pressure increases, the circulating water pressure increases and under the action of the pressure difference, the rotor assembly and the stator assembly are cooled through the circulating flow channel and discharged through the circulating water outlet, because the water at the circulating water inlet is thrown out by the impeller, a low pressure area is formed at the circulating water inlet, thereby forming a water circulation, and the circulating water dissipates heat and cools the rotor assembly and the stator assembly.

[0011] Preferably, it also includes a rubber bushing insert and a rubber bushing, and the rubber bushing insert and the rubber bushing are arranged between the pump upper shell and the pump lower shell; the water pump motor is isolated from vibration and noise is reduced under the action of the rubber bushing insert and the rubber bushing.

[0012] Preferably, the stator core is provided with a slot, and the permanent magnet and the stator core are interference fit by screws; the stator core is provided with a slot, and the permanent magnet and the stator core are interference fit by screws, thereby improving the connection firmness.

[0013] Compared with the prior art, the present invention has the following beneficial effects: when in use, the rotor assembly and the stator assembly are installed on the shell assembly according to the installation requirements, the water pump motor is started, and the cooling water passes through the cooling groove structure under the action of the pressure difference, thereby cooling the rotor assembly, the stator assembly and the shell assembly, thereby realizing the function of self-heating. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0016] Figure 3 It is an axonometric schematic diagram of the present invention;

[0017] Figure 4 It is an enlarged structural schematic diagram of the stator core and the circulating flow channel structure;

[0018] Figure 5 It is an enlarged structural schematic diagram of the stator core and permanent magnet structure;

[0019] Figure 6 is a schematic diagram of the structure of the rotor assembly of the present invention;

[0020] Figure 7 It is an enlarged structural diagram of the winding frame and the waterproof cover structure;

[0021] Figure 8 It is an enlarged structural diagram of the housing terminal and bottom cover structure;

[0022] Fig. 9 It is a schematic diagram of the structure of the winding frame winding;

[0023] Fig.10 It is an enlarged structural diagram of the rubber bushing and the pump lower shell structure.

[0024] Markings in the attached figure: 1. Pump upper shell; 2. Nut; 3. Gasket; 4. Rolling bearing; 5. Impeller upper cover; 6. Impeller lower cover; 7. Rotor core; 8. Fixed shaft; 9. Permanent magnet; 10. Pin; 11. Pump lower shell; 12. Waterproof cover; 13. Rubber ring; 14. Stator core; 15. Winding frame; 16. Casing; 17. Motor terminal; 18. Rubber bushing insert; 19. Rubber bushing; 20. PCB board; 21. Casing terminal; 22. Bottom cover; 23. Circulating water inlet; 24. Water pressure chamber; 25. Circulating flow channel. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] Example 1

[0027] like Figure 1 As shown in the pin 10 of the figure, a water pump motor with self-heat dissipation and high power density of the present invention comprises a rotor assembly, a stator assembly and a housing assembly, wherein the rotor assembly and the stator assembly are respectively arranged inside the housing assembly, the rotor assembly is on the inner side of the stator assembly, and a cooling groove structure is arranged between the housing assembly and the stator assembly;

[0028] The rotor assembly includes a rolling bearing 4, an impeller upper cover 5, an impeller lower cover 6, a rotor core 7, a permanent magnet 9 and a pin 10. The permanent magnet 9 is placed inside the rotor core 7 and fixed by the pin 10. The permanent magnet 9, the impeller lower cover 6 and the rolling bearing 4 are formed into a whole by injection molding, and the whole is connected to the impeller upper cover 5 by welding. The permanent magnet 9 adopts an annular block type;

[0029] The housing assembly includes a pump upper shell 1, a fixed shaft 8 and a pump lower shell 11, the fixed shaft 8 is connected to the pump lower shell 11 by injection molding, the rotor assembly is placed on the fixed shaft 8 with the cooperation of the gasket 3, the top cover of the pump lower shell 11 is equipped with the pump upper shell 1, the pump upper shell 1 and the pump lower shell 11 are connected by ultrasonic welding, the nut 2 is connected to the fixed shaft 8, and the pump upper shell 1 and the pump lower shell 11 are assembled;

[0030] The stator assembly includes a stator core 14, a winding frame 15, a casing 16, a motor terminal 17, a rubber bushing insert 18, a rubber bushing 19, a PCB board 20, a casing terminal 21 and a bottom cover 22. The stator core 14 and the casing 16 are formed as a whole by injection molding. The winding frame 15 is injection molded on the casing 16. The three groups of motor terminals 17 are interference fit to the back of the casing 16. The wire is wound on the winding frame 15. The free end of the wire passes through the casing 16 and is hung inside the three groups of motor terminals 17. The PCB board 20 is installed on the back of the casing 16 with the cooperation of the positioning column. The fixed shaft 8 is injection molded and connected to the pump lower casing 11. The bottom cover 22 is assembled on the casing 16.

[0031] In this embodiment, the rotor assembly is composed of a rolling bearing 4, an impeller upper cover 5, an impeller lower cover 6, a rotor core 7, a permanent magnet 9 and a pin 10. The rotor assembly is fixedly connected to the magnetic tile. By adopting an annular block-type permanent magnet 9, the magnetization direction is circumferential, the axial effective area is significantly increased relative to that of an ordinary motor, and the volume of the magnetic tile is small, so it has a larger power density. The pump upper shell 1 and the pump lower shell 11 are ultrasonically welded, and the permanent magnet and the core are fixed by pins. Together with the sliding bearing, the impeller lower cover is integrally molded, and the water pump motor is started. The cooling water passes through the cooling groove structure under the action of the pressure difference, thereby cooling the rotor assembly, the stator assembly and the housing assembly to achieve the function of self-heating.

[0032] Example 2

[0033] like Figure 1 As shown in the pin 10 of the figure, a water pump motor with self-heat dissipation and high power density of the present invention comprises a rotor assembly, a stator assembly and a housing assembly, wherein the rotor assembly and the stator assembly are respectively arranged inside the housing assembly, the rotor assembly is on the inner side of the stator assembly, and a cooling groove structure is arranged between the housing assembly and the stator assembly;

[0034] The rotor assembly includes a rolling bearing 4, an impeller upper cover 5, an impeller lower cover 6, a rotor core 7, a permanent magnet 9 and a pin 10. The permanent magnet 9 is placed inside the rotor core 7 and fixed by the pin 10. The permanent magnet 9, the impeller lower cover 6 and the rolling bearing 4 are formed into a whole by injection molding, and the whole is connected to the impeller upper cover 5 by welding. The permanent magnet 9 adopts an annular block type;

[0035] The housing assembly includes a pump upper shell 1, a fixed shaft 8 and a pump lower shell 11, the fixed shaft 8 is connected to the pump lower shell 11 by injection molding, the rotor assembly is placed on the fixed shaft 8 with the cooperation of the gasket 3, the top cover of the pump lower shell 11 is equipped with the pump upper shell 1, the pump upper shell 1 and the pump lower shell 11 are connected by ultrasonic welding, the nut 2 is connected to the fixed shaft 8, and the pump upper shell 1 and the pump lower shell 11 are assembled;

[0036] The stator assembly includes a stator core 14, a winding frame 15, a housing 16, a motor terminal 17, a PCB board 20, a housing terminal 21 and a bottom cover 22. The stator core 14 and the housing 16 are formed by injection molding. The winding frame 15 is injection molded on the housing 16. The three groups of motor terminals 17 are press-fitted to the back of the housing 16. The winding frame 15 is used for winding. The free ends of the wires pass through the housing 16 and are hung inside the three groups of motor terminals 17. The PCB board 20 is installed on the back of the housing 16 with the cooperation of the positioning column. The fixed shaft 8 is injection-molded and connected to the lower housing 11 of the pump. The bottom cover 22 is assembled on the housing 16.

[0037] It also includes a waterproof cover 12 and a rubber ring 13, wherein the waterproof cover 12 is sleeved on the stator assembly, and the rubber ring 13 is arranged between the waterproof cover 12 and the stator assembly;

[0038] The cooling tank structure is composed of a circulating water inlet 23, a water pressure chamber 24, a circulating flow channel 25 and a circulating water outlet. The pump upper shell 1 is provided with a circulating water inlet 23 and a water pressure chamber 24, the stator core 14 is provided with a circulating flow channel 25, and the pump upper shell 1 is provided with a circulating water outlet. The circulating water inlet 23 is communicated with the water pressure chamber 24, the water pressure chamber 24 is communicated with the circulating flow channel 25, and the circulating flow channel 25 is communicated with the circulating water outlet.

[0039] It also includes a rubber bushing insert 18 and a rubber bushing 19 , which are arranged between the pump upper shell 1 and the pump lower shell 11 .

[0040] In this embodiment, the rotor assembly is composed of a rolling bearing 4, an impeller upper cover 5, an impeller lower cover 6, a rotor core 7, a permanent magnet 9 and a pin 10. The rotor assembly is fixedly connected to the magnetic tile. By adopting an annular block-type permanent magnet 9, the magnetization direction is circumferential, the axial effective area is significantly increased compared with ordinary motors, and the volume of the magnetic tile is small, so it has a larger power density. The pump upper shell 1 and the pump lower shell 11 are ultrasonically welded, and the permanent magnet and the core are fixed by pins. Together with the sliding bearing, the impeller lower cover is integrally molded, and the waterproof cover 12 is connected to the rubber ring 13. They cooperate with each other to waterproof and seal the stator assembly. When in use, the impeller composed of the impeller upper cover 5 and the impeller lower cover 6 rotates rapidly, and the circulating water enters the water pressure chamber 24 through the circulating water inlet 23. The circulating water is thrown out of the water pressure chamber 24 and the pressure increases. The circulating water pressure increases and cools the rotor assembly and the stator assembly through the circulating flow channel 25 under the action of the pressure difference and is discharged through the circulating water outlet. Since the water at the circulating water inlet 23 is thrown out by the impeller, a low-pressure area is formed at the circulating water inlet 23, thereby forming a water circulation, and the circulating water dissipates heat and cools the rotor assembly and the stator assembly.

[0041] The main functions achieved by the present invention are:

[0042] 1. With its own pressurized circulation channel, the pump increases the fluid pressure to make the fluid flow from high pressure to low pressure. There are guide grooves in the flow channel to reduce the generation of turbulence and achieve self-circulation heat dissipation.

[0043] 2. Plate rotor pump head, axial magnetic pad and pump head integrated design, reducing volume while increasing power density

[0044] 3. The straight-out stator of the circular or directional stator makes the nozzle no longer restricted by the inner diameter of the slot motor during winding. During normal winding, the nozzle is inside the circular or directional stator and is restricted by the inner diameter, while the straight-out type is not restricted.

[0045] 4. The winding wires are concentrated inside the stator bottom disc, and the wire slots are opened inside to ensure that the wires are accurately fixed in the slots.

[0046] 5. The terminal is designed to be claw-type, which can be directly pressed onto the PCB board through the claw elastic force without welding

[0047] 6. The outside of the pump body is equipped with a rubber ring, and there is a corrugated groove inside the ring to isolate the vibration noise of the pump body.

[0048] The rotor core 7 and stator core 14 of the self-heating, high-power-density water pump motor of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual without the need for creative work by technicians in this field.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A self-heating, high-power-density water pump motor, comprising a rotor assembly, a stator assembly and a housing assembly, wherein the housing assembly is provided with a rotor assembly and a stator assembly respectively, wherein the rotor assembly is on the inner side of the stator assembly, It is characterized in that A cooling groove structure is arranged between the housing assembly and the stator assembly.

2. A self-heating, high power density water pump motor as claimed in claim 1, It is characterized in that The rotor assembly comprises a rolling bearing (4), an impeller upper cover (5), an impeller lower cover (6), a rotor core (7), a permanent magnet (9) and a pin (10); the permanent magnet (9) is placed inside the rotor core (7) and fixed by the pin (10); the permanent magnet (9) is formed into a whole with the impeller lower cover (6) and the rolling bearing (4) by injection molding; the whole is connected to the impeller upper cover (5) by welding; and the permanent magnet (9) is an annular block type.

3. A self-heating, high power density water pump motor as claimed in claim 2, It is characterized in that The housing assembly comprises a pump upper housing (1), a fixed shaft (8) and a pump lower housing (11); the fixed shaft (8) and the pump lower housing (11) are connected by injection molding; the rotor assembly is placed on the fixed shaft (8) with the cooperation of a gasket (3); the top end cover of the pump lower housing (11) is provided with the pump upper housing (1); the pump upper housing (1) and the pump lower housing (11) are connected by ultrasonic welding to connect a nut (2) to the fixed shaft (8), so that the pump upper housing (1) and the pump lower housing (11) are assembled.

4. A self-heating, high power density water pump motor as claimed in claim 3, It is characterized in that The stator assembly comprises a stator core (14), a winding frame (15), a casing (16), a motor terminal (17), a PCB board (20), a casing terminal (21) and a bottom cover (22). The stator core (14) and the casing (16) are integrally formed by injection molding. The winding frame (15) is injection molded on the casing (16). Three groups of motor terminals (17) are interference fit onto the back of the casing (16). Wires are wound on the winding frame (15). The free ends of the wires pass through the casing (16) and are hung inside the three groups of motor terminals (17). The PCB board (20) is installed on the back of the casing (16) in cooperation with a positioning column. The fixed shaft (8) is injection molded and connected to the pump lower casing (11). The bottom cover (22) is assembled on the casing (16) in cooperation with the casing terminal (21).

5. A self-heating, high power density water pump motor as claimed in claim 4, It is characterized in that It also comprises a waterproof sleeve (12) and a rubber ring (13); the waterproof sleeve (12) is sleeved on the stator assembly, and the rubber ring (13) is arranged between the waterproof sleeve (12) and the stator assembly.

6. A self-heating, high power density water pump motor as claimed in claim 5, It is characterized in that The cooling tank structure is composed of a circulating water inlet (23), a water pressure chamber (24), a circulating flow channel (25) and a circulating water outlet. The pump upper shell (1) is provided with a circulating water inlet (23) and a water pressure chamber (24), the stator core (14) is provided with a circulating flow channel (25), and the pump upper shell (1) is provided with a circulating water outlet. The circulating water inlet (23) is communicated with the water pressure chamber (24), the water pressure chamber (24) is communicated with the circulating flow channel (25), and the circulating flow channel (25) is communicated with the circulating water outlet.

7. A self-heating, high power density water pump motor as claimed in claim 3, It is characterized in that It also comprises a rubber bushing insert (18) and a rubber bushing (19), wherein the rubber bushing insert (18) and the rubber bushing (19) are arranged between the pump upper shell (1) and the pump lower shell (11).

8. A self-heating, high power density water pump motor as claimed in claim 4, It is characterized in that The stator core is provided with a slot, and the permanent magnet (9) and the stator core (14) are interference-fitted by screws.

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