A concentrated winding brushless DC water pump motor

Abstract

The invention relates to the technical field of water pump motors, and proposes a concentrated winding brushless DC water pump motor, comprising a pump casing, a stator, a rotor and an impeller, wherein the impeller and the rotor are coaxially connected, and further comprising a cooling shell and an air cooling mechanism, wherein the cooling shell is sleeved on the outside of the pump casing, the water outlet of the pump casing is connected to the cooling shell, the top of the cooling shell is connected to a drain outlet, the air cooling mechanism is used for air cooling the pump casing, the air cooling mechanism comprises a cooling shell, a heat sink and a fan, the cooling shell is sleeved on the outside of the cooling shell, the heat sink is arranged on the outside of the cooling shell, the fan is connected to the rotor in a driving manner, the air outlet of the fan faces the cooling shell, and further comprising a cleaning component, the cleaning component comprises a cleaning plate and a brush, the cleaning plate is connected to one of a plurality of fans in a driving manner, the brush is arranged on the cleaning plate, and the brush is in contact with a filter screen; through the above technical scheme, the problem of poor heat dissipation effect of the water pump motor in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of water pump motors, and in particular to a concentrated winding brushless DC water pump motor. Background Art

[0002] The main working parts of the water pump are the rotating impeller and the fixed pump casing. The impeller is the part of the water pump that directly does work on the liquid. The impeller is driven by a motor to rotate at high speed, forcing the liquid between the blades to rotate as well. At the same time, due to the action of centrifugal force, the liquid moves radially from the center of the impeller to the outer edge. The liquid gains energy in the process of flowing through the impeller, and leaves the outer edge of the impeller at high speed and enters the volute pump casing. In the volute, the liquid slows down due to the gradual expansion of the flow channel, and part of the kinetic energy is converted into static pressure energy, reaching a higher pressure, and finally flows tangentially into the extrusion pipe.

[0003] The brushless DC water pump motor is mainly composed of a rotor made of permanent magnetic material and a stator with a coil winding. The stator is composed of stacked steel laminations with axial slots for winding. When current passes through the coil, a magnetic field is generated. The magnetic field is driven by the magnetic poles of the stator. The same polarities repel each other and the opposite polarities attract each other. The direction of the current in the coil is continuously changed, and the magnetic poles of the magnetic field induced by the rotor will also continue to change, and the rotor will keep rotating under the action of the magnetic field.

[0004] During the operation of the brushless DC water pump motor, the current generates resistance loss and core loss in the winding and core, resulting in heat. The current common motor cooling method is natural cooling. The heat generated inside the motor is mainly dissipated through convection and radiation of the heat sink, casing and surrounding air. The heat dissipation effect is poor, causing heat deformation or damage to the internal components and circuits of the water pump motor. Summary of the invention

[0005] The present invention provides a concentrated winding brushless DC water pump motor, which solves the problem of poor heat dissipation effect of the water pump motor in the prior art.

[0006] The technical solution of the present invention is as follows: A concentrated winding brushless DC water pump motor comprises a pump housing, a stator, a rotor and an impeller, wherein the impeller and the rotor are coaxially connected, and further comprises:

[0007] A cooling shell, wherein the cooling shell is sleeved on the outside of the pump shell, a water outlet of the pump shell is connected to the cooling shell, and a drain outlet is connected to the top of the cooling shell;

[0008] An air cooling mechanism, the air cooling mechanism is used to cool the pump casing by air, and the air cooling mechanism comprises:

[0009] A cooling shell, wherein the cooling shell is sleeved on the outside of the cooling shell;

[0010] A heat sink, the heat sink being arranged outside the cooling shell;

[0011] A fan is drivingly connected to the rotor, and an air outlet of the fan faces the cooling shell.

[0012] In order to reduce the impurities from entering the interior of the pump housing, a filter bin is provided at the water inlet of the pump housing, and a filter screen is provided inside the filter bin.

[0013] In order to reduce the clogging of the filter screen, a cleaning component is also included, and the cleaning component includes:

[0014] A cleaning plate, the cleaning plate being drivingly connected to one of the plurality of fans;

[0015] A brush is provided on the cleaning plate, and the brush is in contact with the filter screen.

[0016] In order to realize the transmission connection between the fan and the rotor, the fan is transmission-connected to the rotor via a transmission assembly, and the transmission assembly includes:

[0017] A driving rod, the driving rod being coaxially connected to an end of the rotor away from the impeller;

[0018] A driven rod, the driven rod is coaxially arranged on one side of the fan;

[0019] A transmission gear, wherein a plurality of transmission gears are provided, and the driven rod and the driving rod are connected in transmission through the transmission gears.

[0020] In order to realize the transmission connection between the cleaning plate and the fan, a connecting member is also included, and the connecting member includes:

[0021] A connecting rod, the connecting rod being connected to a side of one of the plurality of fans away from the driven rod;

[0022] A cleaning rod is connected to a side of the cleaning plate away from the brush, and the cleaning rod is transmission-connected to the connecting rod via a sprocket chain.

[0023] In order to avoid external influence on the fan and the transmission gear, it also includes a protective cover and a transmission shell. The protective cover is arranged on the cooling shell and is connected to the cooling shell. The fan and the transmission gear are both located inside the protective cover, and the driven rod and the driving rod are both rotatably matched with the transmission shell.

[0024] In order to replace the brush, a replacement plate is detachably connected to the cleaning plate, and the brush is arranged on the replacement plate.

[0025] In order to improve the cooling effect on the water pump motor, the side of the cooling housing away from the fan is set as an open structure.

[0026] In order to clean the impurities in the filter bin, a cleaning port is provided at the bottom of the filter bin, and a cleaning plate is provided at the cleaning port.

[0027] In order to replace the filter screen, the filter bin is a detachable structure.

[0028] The working principle and beneficial effects of the present invention are:

[0029] 1. In the present invention, the stator is energized to generate a magnetic field, driving the rotor to drive the impeller to rotate, thereby realizing water inlet and outlet of the water pump. After being discharged from the water outlet of the pump casing, the water enters the interior of the cooling casing, cools the exterior of the pump casing, and is then discharged through the drain port. In the process of pumping water, the pump casing is cooled, thereby cooling the internal components thereof and reducing their damage.

[0030] 2. In the present invention, the rotor will also drive the driving rod to rotate during the rotation process, and drive multiple fans to rotate under the action of the transmission gear to blow air into the interior of the cooling shell, dissipate heat to the pump shell and the cooling shell through the heat sink, and blow the hot air outward through the fan to improve the cooling effect of the water pump motor.

[0031] 3. In the present invention, impurities in the pumped water are filtered through the filter screen, and at the same time, the fan drives the connecting rod to rotate, and the cleaning rod and the cleaning plate are driven to rotate through the sprocket chain, driving the brush to clean the surface of the filter screen, sweeping away the impurities to avoid clogging the filter screen.

[0032] 4. Therefore, compared with the water pump motor in the prior art, the present invention first delivers the pumped water into the interior of the cooling shell, and uses water to cool the outside of the pump shell during the water delivery process. At the same time, the rotor drives the fan to rotate to air-cool the outside of the cooling shell, further improving the cooling effect of the pump shell. The incoming water is filtered through the filter, and the fan drives the cleaning plate and the brush to rotate to clean the filter to avoid clogging, thereby reducing damage to the water pump motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] Figure 1 It is a schematic structural diagram of the first viewing angle of the entire present invention;

[0035] Figure 2 It is a structural schematic diagram of the second viewing angle of the whole invention;

[0036] Figure 3 It is a schematic diagram of the structure of a partial cross-section of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the stator, rotor and impeller of the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of the cooling housing, the filter bin, the air cooling mechanism and the cleaning assembly of the present invention;

[0039] Figure 6 It is a schematic diagram of the structure of the air cooling mechanism and the cleaning assembly of the present invention;

[0040] Figure 7 It is a schematic diagram of the structure of the fan and cleaning assembly of the present invention;

[0041] Figure 8 For the present invention Figure 5 A schematic diagram of the local enlarged structure at the center;

[0042] Fig. 9 This is a schematic diagram of the structure of the fan and cleaning assembly in the second embodiment of the present invention;

[0043] Fig.10 This is a schematic diagram of the structure of the fan and cleaning assembly in Embodiment 3 of the present invention;

[0044] Fig.11 It is a schematic diagram of the structure of the cleaning plate, brush and cleaning rod in the present invention.

[0045] In the figure:

[0046] 1. Pump casing; 2. Stator; 3. Rotor; 4. Impeller; 5. Water inlet; 6. Water outlet; 7. Cooling casing; 8. Filter chamber; 9. Filter screen; 10. Protective cover; 11. Transmission casing; 12. Drainage outlet;

[0047] 101. cooling housing; 102. heat sink; 103. fan;

[0048] 201, driving rod; 202, driven rod; 203, transmission gear;

[0049] 301, cleaning plate; 302, brush; 303, replacement plate;

[0050] 401. Connecting rod; 402. Cleaning rod. DETAILED DESCRIPTION

[0051] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Embodiment 1, as Figures 1 to 8 as well as Fig.11 As shown, this embodiment proposes a centralized winding brushless DC water pump motor, including a pump housing 1, a stator 2, a rotor 3 and an impeller 4. The impeller 4 and the rotor 3 are coaxially connected. The pump housing 1 is provided with a water inlet 5 and a water outlet 6. The impeller 4 is driven by the rotor 3 to rotate at a high speed, forcing the liquid between the blades to rotate accordingly. At the same time, due to the action of centrifugal force, the liquid moves radially from the center to the outer edge of the impeller 4. The water inlet 5 is located at the center of the impeller 4, and the water outlet 6 is located at the tangent position of the edge of the impeller 4. The liquid obtains energy in the process of flowing through the impeller 4, and leaves the outer edge of the impeller 4 at a high speed to enter the volute pump housing 1. In the volute, the liquid is decelerated due to the gradual expansion of the flow channel, and part of the kinetic energy is converted into static pressure energy to achieve a higher pressure. Finally, it flows into the extrusion pipe along the tangent direction. The brushless DC water pump motor is mainly composed of a rotor 3 made of permanent magnetic material and a stator 2 with a coil winding. The stator 2 is composed of stacked steel The invention is composed of stacked sheets and has axial grooves for winding. When current passes through the coil, a magnetic field is generated. The magnetic field is driven by the magnetic poles of the stator 2. Like polarities repel each other and opposite polarities attract each other. The direction of the current in the coil is continuously changed, and the magnetic poles of the magnetic field induced by the rotor 3 will also continue to change. The rotor 3 will keep rotating under the action of the magnetic field. It also includes a cooling shell 7 and an air cooling mechanism. Compared with the water pump motor in the prior art, the present invention first sends the pumped water into the interior of the cooling shell 7, and uses water to cool the outside of the pump shell 1 during the water delivery process. At the same time, the rotor 3 drives the fan 103 to rotate, and air cools the outside of the cooling shell 7, further improving the cooling effect of the pump shell 1, and filters the incoming water through the filter 9. The fan 103 drives the cleaning plate 301 and the brush 302 to rotate, and cleans the filter 9 to avoid blockage, thereby reducing damage to the water pump motor.

[0053] like Figures 1 to 5As shown, the cooling shell 7 is sleeved on the outside of the pump shell 1, the water outlet 6 of the pump shell 1 is connected to the cooling shell 7, and the top of the cooling shell 7 is connected to a drain port 12. The coil in the stator 2 is energized to generate an electromagnetic field, driving the rotor 3 to rotate, and the rotor 3 drives the impeller 4 to rotate. The liquid between the blades of the impeller 4 also rotates accordingly. At the same time, due to the action of centrifugal force, the liquid moves radially from the center to the outer edge of the impeller 4. The liquid gains energy in the process of flowing through the impeller 4, and leaves the outer edge of the impeller 4 at a high speed to enter the volute pump shell 1. In the volute, the flow passage is gradually expanded and decelerated, and part of the kinetic energy is converted into static energy. The pressure energy reaches a higher pressure, and finally flows into the extrusion pipe tangentially to realize the pumping of water. The water first enters the interior of the cooling shell 7 through the water outlet 6. After the water covers the cooling shell 7, it is discharged from the drain port 12 on the top. In this process, the water cools the outside of the pump shell 1. At the same time, the water is in a flowing state, which can keep the low temperature of the water in the cooling shell 7. When working, that is, when the water pump motor is energized, the water pump pumps the water, and the water enters the cooling shell 7 to cool the water pump motor. When not working, the water is in a static state and does not have a cooling effect, thereby realizing automatic cooling of the water pump motor.

[0054] like Figures 1 to 6As shown, the air cooling mechanism is used to cool the pump casing 1 with air, and the air cooling mechanism includes a cooling casing 101, a heat sink 102 and a fan 103. The cooling casing 101 is sleeved on the outside of the cooling casing 7, and the heat sink 102 is arranged on the outside of the cooling casing 7. The fan 103 is connected to the rotor 3 in a transmission manner, and the air outlet of the fan 103 faces the cooling casing 101. The pump casing 1 and the cooling casing 7 dissipate heat outwardly through the heat sink 102. In order to realize the transmission connection between the fan 103 and the rotor 3, the fan 103 is connected to the rotor 3 in a transmission manner through a transmission assembly. The transmission assembly includes a driving rod 201, a driven rod 202 and a transmission gear 203. The driving rod 201 is coaxially connected to one end of the rotor 3 away from the impeller 4, and the driven rod 202 is coaxially arranged on one side of the fan 103. A plurality of transmission gears 203 are arranged, and the driven rod 202 and the driving rod 201 are connected in a transmission manner through the transmission gear 203. The driven rod 202 and the driving rod 201 are coaxially provided with a transmission gear 203, and the two transmission gears 203 are meshed with each other. In the process of pumping water, the rotor 3 drives the driving rod 201 to rotate, and the transmission action of the transmission gear 203 drives multiple driven rods 202 to rotate, that is, drives multiple fans 103 to rotate, and the cold air generated by the fan 103 is blown into the interior of the cooling shell 101, accelerating the air flow rate in the cooling shell 101, so that the heat dissipated by the heat sink 102 is quickly dissipated to the outside, thereby realizing air cooling and cooling of the water pump motor. In order to improve the cooling effect of the water pump motor, the side of the cooling shell 101 away from the fan 103 is set to an open structure, which is convenient for further improving the air flow in the cooling shell 101 and enhancing the heat dissipation and cooling effect. At the same time, the blown air can cool the position corresponding to the impeller 4 on the pump shell 1 and the water outlet 6.

[0055] like Figures 1 to 8 As shown, in order to reduce the amount of impurities entering the pump casing 1, a filter bin 8 is provided at the water inlet 5 of the pump casing 1, a filter screen 9 is provided inside the filter bin 8, and the filter bin 8 is connected to a water inlet pipe. The suction force generated by the water pump draws water into the filter bin 8 through the water inlet pipe, and the impurities in the water are blocked by the filter screen 9 to prevent the impurities from entering the impeller 4 and causing damage to the water pump. The filtered impurities are retained in the filter bin 8, and a cleaning port is provided at the bottom of the filter bin 8, and a cleaning plate is provided at the cleaning port. The cleaning plate is opened regularly to clean the impurities in the filter bin 8.

[0056] like Figure 5 , Figure 8 and Fig.11As shown, in order to reduce the clogging of the filter 9, a cleaning component is also included, the cleaning component includes a cleaning plate 301 and a brush 302, the cleaning plate 301 is connected to one of the multiple fans 103 by transmission, the brush 302 is arranged on the cleaning plate 301, the brush 302 is in contact with the filter 9, and in order to achieve the transmission connection between the cleaning plate 301 and the fan 103, a connecting member is also included, the connecting member includes a connecting rod 401 and a cleaning rod 402, the connecting rod 401 is connected to one side of the multiple fans 103 away from the driven rod 202 The cleaning rod 402 is connected to the side of the cleaning plate 301 away from the brush 302, and the cleaning rod 402 is connected to the connecting rod 401 through the sprocket chain. When the rotor 3 drives the impeller 4 to rotate to pump water, the driving rod 201 drives the multiple fans 103 to rotate for air cooling. One of the multiple fans 103 drives the connecting rod 401 to rotate, and the cleaning rod 402 is driven to rotate under the transmission action of the sprocket chain, thereby driving the cleaning plate 301 and the brush 302 to rotate, cleaning the surface of the filter 9 to reduce the blockage of the filter 9, and the chain A protective cover 10 is provided on the outside of the wheel chain to prevent the sprocket chain from being stuck due to external impurities. In order to replace the brush 302, a replacement plate 303 is detachably connected to the cleaning plate 301 by bolts. The brush 302 is arranged on the replacement plate 303. The replacement plate 303 and the brush 302 can be replaced regularly to ensure the cleaning effect of the brush 302 and prevent impurities from accumulating between the brush 302 and the filter 9. In order to replace the filter 9, the filter bin 8 is a detachable structure. The filter bin 8 includes a large bin and a small bin. The filter 9 is detachably installed on the filter 9. The interior of the small bin is at the junction of the large bin and the small bin. The large bin and the small bin are detachably connected by bolts. A cleaning port is opened on the large bin. Impurities filtered out by the filter 9 fall at the bottom of the large bin. The impurities in the large bin can be cleaned out by opening the cleaning plate. When replacing the filter 9, the cleaning plate 301 is rotated to a vertical state, the cleaning plate is opened, the bolts are loosened to disassemble the large bin and the small bin, and the large bin is moved upward. The cleaning plate 301 is moved out of the large bin through the cleaning port to avoid obstruction to the disassembly of the large bin, and then the filter 9 can be replaced.

[0057] like Figure 1 to Figure 2 As shown, in order to avoid external influence on the fan 103 and the transmission gear 203, a protective cover 10 and a transmission shell 11 are also included. The protective cover 10 is arranged on the cooling shell 101 and is connected to the cooling shell 101. The fan 103 and the transmission gear 203 are both located inside the protective cover 10. The driven rod 202 and the driving rod 201 are both rotatably matched with the transmission shell 11. The fan 103 and the transmission gear 203 are protected by the protective cover 10 and the transmission shell 11 to avoid external impurities from hindering the rotation of the fan 103 and the transmission gear 203.

[0058] The working principle or use process of this concentrated winding brushless DC water pump motor is as follows:

[0059] The coil on the stator 2 is energized to generate an electromagnetic field, which drives the rotor 3 and the impeller 4 to rotate and pump water. The water enters the pump housing 1 through the water inlet 5 and enters the cooling housing 7 through the water outlet 6. The filter 9 filters the impurities in the water. The cold water cools the pump housing 1, thereby cooling the stator 2, rotor 3 and circuits inside the pump housing 1. Then the water is discharged through the drain 12.

[0060] While the rotor 3 rotates, the driving rod 201 drives the driven rod 202 and the fan 103 to rotate, delivering cold air into the cooling shell 101 to cool the water pump motor. At the same time, the corresponding fan 103 drives the connecting rod 401 and the cleaning rod 402 to rotate, drives the cleaning plate 301 and the brush 302 to rotate, and cleans the filter 9. The cleaning plate is opened regularly to clean the impurities in the filter bin 8.

[0061] Embodiment 2, as Fig. 9 As shown, the transmission component adopts a sprocket chain structure, and the two sprockets are coaxially arranged on the driving rod 201 and the driven rod 202 respectively. The two sprockets are connected by a chain transmission. In the process of pumping water, the rotor 3 drives the driving rod 201 to rotate, and drives the multiple driven rods 202 to rotate under the transmission action of the sprocket chain, that is, drives the multiple fans 103 to rotate.

[0062] Embodiment three, as Fig.10 As shown, the transmission component adopts belt drive, and two pulleys are coaxially arranged on the driving rod 201 and the driven rod 202 respectively. The two pulleys are driven by a belt. When the rotor 3 drives the driving rod 201 to rotate, the belt can drive multiple driven rods 202 to rotate, that is, drive multiple fans 103 to rotate.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concentrated winding brushless DC water pump motor, comprising a pump housing (1), a stator (2), a rotor (3) and an impeller (4), wherein the impeller (4) and the rotor (3) are coaxially connected, characterized in that: Also includes: A cooling shell (7), the cooling shell (7) being sleeved on the outside of the pump shell (1), the water outlet (6) of the pump shell (1) being in communication with the cooling shell (7), and the top of the cooling shell (7) being in communication with a drain outlet (12); An air cooling mechanism, the air cooling mechanism is used to cool the pump casing (1) by air, and the air cooling mechanism comprises: A cooling shell (101), wherein the cooling shell (101) is sleeved on the outside of the cooling shell (7); A heat sink (102), the heat sink (102) being arranged outside the cooling shell (7); A fan (103), the fan (103) being drivingly connected to the rotor (3), and an air outlet of the fan (103) facing the cooling housing (101); A filter chamber (8) is provided at the water inlet (5) of the pump housing (1), and a filter screen (9) is provided inside the filter chamber (8); Also included is a cleaning assembly, the cleaning assembly comprising: A cleaning plate (301), the cleaning plate (301) being drivingly connected to one of the fans (103) among the plurality of fans (103); a brush (302), the brush (302) being arranged on the cleaning plate (301), the brush (302) being in contact with the filter screen (9); The fan (103) is transmission-connected to the rotor (3) via a transmission assembly, wherein the transmission assembly comprises: A driving rod (201), the driving rod (201) being coaxially connected to an end of the rotor (3) away from the impeller (4); A driven rod (202), the driven rod (202) being coaxially arranged on one side of the fan (103); A transmission gear (203), wherein a plurality of the transmission gears (203) are provided, and the driven rod (202) and the driving rod (201) are transmission-connected via the transmission gears (203); Also included is a connecting piece, the connecting piece comprising: A connecting rod (401), the connecting rod (401) being connected to a side of one of the plurality of fans (103) that is away from the driven rod (202); A cleaning rod (402), the cleaning rod (402) being connected to a side of the cleaning plate (301) away from the brush (302), the cleaning rod (402) being transmission-connected to the connecting rod (401) via a sprocket chain.

2. The concentrated winding brushless DC water pump motor according to claim 1, characterized in that: It also includes a protective cover (10) and a transmission housing (11), wherein the protective cover (10) is disposed on the cooling housing (101) and is in communication with the cooling housing (101), the fan (103) and the transmission gear (203) are both located inside the protective cover (10), and the driven rod (202) and the driving rod (201) are both rotatably matched with the transmission housing (11).

3. The concentrated winding brushless DC water pump motor according to claim 2, characterized in that: The cleaning plate (301) is detachably connected to a replacement plate (303), and the brush (302) is arranged on the replacement plate (303).

4. The concentrated winding brushless DC water pump motor according to claim 3, characterized in that: A side of the cooling housing (101) away from the fan (103) is configured as an open structure.

5. The concentrated winding brushless DC water pump motor according to claim 4, characterized in that: The bottom of the filter bin (8) is provided with a cleaning port, and a cleaning plate is provided at the cleaning port.

6. The concentrated winding brushless DC water pump motor according to claim 5, characterized in that: The filter bin (8) is a detachable structure.

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