Axial flux motor integrated pump

Abstract

The utility model discloses an axial magnetic flux motor integrated pump, and relates to the technical field of motor and water pump integrated machine equipment. The axial flux motor integrated pump comprises a shell, a rotor assembly and a stator assembly. The shell comprises a pipe orifice; the rotor assembly comprises a water flowing cavity and a sealing cavity, the water flowing cavity is communicated with a pipe opening of the shell, the sealing cavity is provided with a roller bearing, the roller bearing comprises an inner ring and an outer ring, and the inner ring and the outer ring can rotate relatively. A static ring is arranged on the side, facing the rotor assembly, of the stator assembly in the first direction, and the static ring is matched with an inner ring of the roller bearing in a concave-convex mode, so that the static ring and the inner ring can rotate synchronously, and the static ring and the outer ring can rotate relative to each other. By adopting the technology provided by the utility model, the stator assembly and the rotor assembly are effectively prevented from having a relatively large retardation phenomenon when the motor is started.

Description

Technical Field

[0001] The utility model relates to the technical field of motor-water pump integrated equipment, in particular to an axial magnetic flux motor-integrated pump. Background Art

[0002] Axial flux motor integrated pump refers to a device that integrates an axial flux motor and a pump body. It realizes the suction and discharge of liquid based on the magnetic characteristics of the axial flux motor. The axial flux motor integrated pump has the advantages of high efficiency and low noise, and is suitable for a variety of pump systems. The current axial flux motor integrated pump has a relatively complex structure and requires a higher initial cost.

[0003] Specifically, an embodiment of the structure of the current dynamic ring 50' and the static ring is shown in Figure 1 As shown, the cooperation between the moving ring 50' (the part connected to the motor rotor) and the stationary ring (the part connected to the stator or pump housing) of the axial flux motor integrated pump is very critical and requires precise matching to ensure the effective transmission of magnetic force and the stable operation of the equipment. The moving ring 50' inside the pump body needs to be sleeved on the stationary ring, and the stationary ring is stationary relative to the moving ring, so that when the motor starts, the mutual friction between the moving ring 50' and the stationary ring will cause greater resistance to the motor starting. Utility Model Content

[0004] The utility model provides an axial magnetic flux motor integrated pump to solve the problem of relatively large resistance between the stator assembly and the rotor assembly of the motor integrated pump in the prior art when the motor is started.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is to provide an axial flux motor integrated pump, and the axial flux motor integrated pump includes: a housing, a rotor assembly and a stator assembly.

[0006] The shell includes a pipe mouth; the rotor assembly includes a water flow chamber and a sealed chamber, the water flow chamber is connected to the pipe mouth of the shell, the sealed chamber is provided with a roller bearing, the roller bearing includes an inner ring and an outer ring, and the inner ring and the outer ring can rotate relative to each other.

[0007] The stator assembly is provided with a stationary ring along the first direction toward one side of the rotor assembly, and the stationary ring is matched with the inner ring of the roller bearing in a concave-convex manner, so that the stationary ring can rotate synchronously with the inner ring and can rotate relative to the outer ring.

[0008] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0009] Using roller bearings to replace the moving ring can effectively reduce the contact area between the moving ring and the stationary ring, so that the rolling friction between the inner and outer rings of the roller bearings replaces the sliding friction between the moving ring and the stationary ring, reducing the relative friction between the stator assembly and the rotor assembly. When the motor starts (that is, when the rotor assembly starts to rotate), the starting resistance is reduced and obvious blocking is avoided.

[0010] In some embodiments, the inner ring is provided with a first protrusion along the side facing the outer ring, and the first protrusion abuts against the ball; the outer ring is provided with a second protrusion along the side facing the inner ring, and the second protrusion abuts against the ball.

[0011] By adopting the above technical solution, the contact area with the ball can be increased by providing the first convex portion and the second convex portion, so that loads can be applied in both the axial direction (first direction) and the radial direction, and the ball can be prevented from falling out of the raceway.

[0012] In some embodiments, the inner ring is provided with a first arc contact surface to abut against the ball, and the outer ring is provided with a second arc contact surface to abut against the ball; wherein the projections of the first arc contact surface and the second arc contact surface along the second direction are larger than a quarter of the arc of the projection of the ball along the second direction. The first arc contact surface and the second arc contact surface are arranged to match the shape of the ball, and compared with the sliding friction between the current static ring and the dynamic ring, the rolling friction of the ball is smaller.

[0013] In some embodiments, the projected arc length of the first arc contact surface along the second direction is greater than the projected arc length of the second arc contact surface along the second direction.

[0014] By adopting the above technical solution, when the motor-integrated pump is operating, the outer ring rotates with the groove plate relative to the stator assembly, and the inner ring is stationary with the stator assembly. Therefore, the first arc contact surface is arranged on the inner ring with relatively large friction, which is beneficial to torque transmission, and the second arc contact surface is arranged on the outer ring with relatively small friction, which increases the service life of the roller bearing.

[0015] In some embodiments, the stationary ring is provided with a convex portion along the first direction toward the roller bearing, and the convex portion is embedded in the inner ring and has an interference fit with the inner ring. The mechanical connection method of interference fit can improve the connection stability between the inner ring and the stationary ring.

[0016] In some embodiments, the water flow chamber is further provided with a plurality of spiral grooves, and the plurality of spiral grooves are bent in a clockwise or counterclockwise direction.

[0017] By adopting the above technical solution, the spiral groove can form a spiral flow channel, so that when the rotor rotates, water can be continuously directed to the water outlet, replacing the water impeller of the traditional water pump.

[0018] In some embodiments, the shell further includes a first shell portion, a second shell portion and a plurality of connecting grooves, wherein the plurality of connecting grooves are circumferentially arranged on the shell and penetrate the first shell portion along the first direction to extend to the second shell portion, wherein the stator assembly is located in the first shell portion and the rotor assembly is located in the second shell portion.

[0019] By adopting the above technical solution, a connection groove is provided to insert a connection member to ensure a stable connection between the first shell and the second shell. Compared with the current bolt locking, the connection structure of the connection groove can reduce the contact area with the liquid.

[0020] In some embodiments, the shell also includes a base, which is connected to the first shell part and the second shell part respectively, wherein an arc-shaped boss is provided at the connection between the base and the second shell part, which can avoid stress concentration and reduce the impact of the rotation of the rotor assembly on the whole.

[0021] With the above technical solution, the rotor assembly will rotate continuously during the application of the motor-integrated pump, and the overall configuration of the rotor assembly is circular, which can reduce the rotation resistance. Therefore, an arc-shaped boss connected to the second shell is provided on the base.

[0022] In some embodiments, a heat sink is further provided on a side of the stator assembly away from the pipe opening along the first direction.

[0023] By adopting the above technical solution, a heat sink is provided at the connection between the stator assembly and the housing to prevent the coil of the stator assembly from burning due to overheating of the motor.

[0024] In some embodiments, the stationary ring is made of stainless steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:

[0026] Figure 1 It is a schematic diagram of a static ring and a dynamic ring of an embodiment of a motor-integrated pump in the prior art;

[0027] Figure 2 It is a cross-sectional view of an embodiment of an axial flux motor integrated pump provided by the utility model;

[0028] Figure 3 This is an exploded view of an embodiment of an axial flux motor integrated pump provided by the utility model;

[0029] Figure 4 This is a schematic diagram of a static ring and a roller bearing of an axial flux motor integrated pump provided by the utility model;

[0030] Figure 5 It is a cross-sectional view of a roller bearing of an axial flux motor integrated pump provided by the utility model;

[0031] Figure 6 It is a side view of an embodiment of an axial flux motor integrated pump provided by the utility model;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of a base of an embodiment of an axial flux motor integrated pump provided by the utility model.

[0033] In the figure:

[0034] Shell—10; pipe mouth—11; first shell part—12; second shell part—13; connecting groove—14; connecting piece—140; base—15; arc boss—150; rotor assembly—20; groove plate—21; sealing chamber—22; water flow chamber—23; spiral groove—230;

[0035] Roller bearing—30; inner ring—31; first protrusion—310; first contact surface—311; outer ring—32; second protrusion—320; second contact surface—321; ball—33; stator assembly—40; stationary ring—41; heat sink—42; dynamic ring—50'. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] For the convenience of subsequent description, before describing the specific structure of the axial flux motor integrated pump, this application first combines Figure 1 A first direction (X), a second direction (Z) and a third direction (Y) are defined. The first direction is the axial direction of the axial flux motor integrated pump when it is normally placed, such as the X direction; the second direction is the height direction of the axial flux motor integrated pump when it is normally placed, such as the Z direction.

[0038] See also Figures 1 to 4 As shown, in some embodiments, the axial flux motor integrated pump includes: a housing 10 , a rotor assembly 20 and a stator assembly 40 .

[0039] The shell 10 includes a pipe mouth 11; the rotor assembly 20 includes a water flow chamber 23 and a sealing chamber 22, the water flow chamber 23 is connected to the pipe mouth 11 of the shell 10, and the sealing chamber 22 is provided with a roller bearing 30, the roller bearing 30 includes an inner ring 31 and an outer ring 32, and the inner ring 31 and the outer ring 32 can rotate relative to each other.

[0040] The stator assembly 40 is provided with a stationary ring 41 along the first direction toward the rotor assembly 20 . The stationary ring 41 is matched with the inner ring 31 of the roller bearing 30 in a concave-convex manner, so that the stationary ring 41 can rotate synchronously with the inner ring 31 and can rotate relative to the outer ring 32 .

[0041] In the embodiment of the present application, the use of roller bearings 30 to replace the moving ring 50' can effectively reduce the contact area between the moving ring 50' and the stationary ring 41, so that the rolling friction between the inner ring 31 and the outer ring 32 of the roller bearing 30 replaces the sliding friction between the moving ring 50' and the stationary ring 41, reducing the relative friction between the stator assembly 40 and the rotor assembly 20. When the motor starts (that is, when the rotor assembly 20 starts to rotate), the starting resistance is reduced to avoid obvious blocking.

[0042] Exemplarily, the material of the stationary ring 41 is stainless steel, so that it can be used in an environment where ceramic materials are not suitable, wherein the stainless steel material can fit with the roller bearing 30. In some embodiments, the protrusion size of the current stationary ring 41 can be adjusted so that it can fit with the roller bearing 30.

[0043] By dividing the two sides of the groove plate 21 of the rotor assembly 20 into a sealed chamber 22 and a water flow chamber 23, when the pump body is located in a fluid (such as water), the liquid can penetrate into the water flow chamber 23 through the multiple holes of the water flow chamber 23 and flow out from the pipe mouth 11. The electromagnet of the rotor assembly 20 is located in the sealed chamber 22. Thus, the rotor assembly 20 can realize the electromagnetic rotation and the water impeller function of a traditional water pump at the same time.

[0044] Exemplarily, the water flow chamber 23 is further provided with a plurality of spiral grooves 230, and the plurality of spiral grooves 230 are bent in a clockwise or counterclockwise direction. The spiral grooves 230 can be arranged inside the groove plate 21 and the housing 10, and adopt a centrifugal design so that when the rotor rotates at a high speed, the centrifugal force generated can extract the liquid.

[0045] In some embodiments, a heat sink 42 is further provided on the side of the stator assembly 40 away from the nozzle 11 along the first direction. The heat sink 42 is provided at the connection between the stator assembly 40 and the housing 10 to prevent the coil of the stator assembly 40 from burning due to overheating of the motor.

[0046] In some embodiments, the stationary ring 41 is provided with a convex portion along the first direction toward the roller bearing 30, and the convex portion is embedded in the inner ring 31 and has an interference fit with the inner ring 31. The mechanical connection method of interference fit can improve the connection stability between the inner ring 31 and the stationary ring 41.

[0047] In some embodiments, in combination Figure 5 As shown, the inner ring 31 is provided with a first protrusion 310 along the side facing the outer ring 32 , and the first protrusion 310 abuts against the ball 33 ; the outer ring 32 is provided with a second protrusion 320 along the side facing the inner ring 31 , and the second protrusion 320 abuts against the ball 33 .

[0048] The inner ring 31 is provided with a first arc contact surface 311 which abuts against the ball 33, and the outer ring 32 is provided with a second arc contact surface 321 which abuts against the ball 33; wherein the projection of the first arc contact surface 311 and the second arc contact surface 321 along the second direction is larger than a quarter arc of the projection of the ball 33 along the second direction.

[0049] In the embodiment of the present application, the first convex portion 310 and the second convex portion 320 are provided to increase the contact area with the ball 33, so that the load can be applied in both the axial direction (first direction) and the radial direction, and the ball 33 is prevented from slipping out of the raceway. The first arc contact surface 311 and the second arc contact surface 321 are formed to match the shape of the ball 33, and compared with the sliding friction between the current stationary ring 41 and the dynamic ring 50', the rolling friction of the ball 33 is smaller.

[0050] In some embodiments, the projected arc length of the first arc contact surface 311 along the second direction is greater than the projected arc length of the second arc contact surface 321 along the second direction.

[0051] In the embodiment of the present application, when the motor-integrated pump is operating, the outer ring 32 rotates with the groove plate 21 relative to the stator assembly 40, and the inner ring 31 is stationary with the stator assembly 40. Therefore, the first arc contact surface 311 is arranged on the inner ring 31 with relatively large friction, which is beneficial to torque transmission, and the second arc contact surface 321 is arranged on the outer ring 32 with relatively small friction, which increases the service life of the roller bearing 30.

[0052] In some embodiments, in combination Figure 6 As shown, the shell 10 also includes a first shell portion 12, a second shell portion 13 and a plurality of connecting grooves 14, wherein the plurality of connecting grooves 14 are circumferentially arranged on the shell 10 and penetrate the first shell portion 12 along a first direction to extend to the second shell portion 13, wherein the stator assembly 40 is located in the first shell portion 12 and the rotor assembly 20 is located in the second shell portion 13.

[0053] In the present application embodiment, combined Figure 3As shown, a connection groove 14 is provided to insert a connection member 140 to ensure a stable connection between the first shell 12 and the second shell 13. The connection groove 14 is a cavity arranged circumferentially of the shell 10, so that the first shell 10 and the second shell 10 can be sealed after being connected to avoid contact with liquid when the water pump is placed in water.

[0054] In some embodiments, see Figure 7 As shown, the housing 10 also includes a base 15, which is connected to the first shell portion 12 and the second shell portion 13 respectively, wherein an arc-shaped boss 150 is provided at the connection between the base 15 and the second shell portion 13, which can avoid stress concentration and reduce the impact of the rotation of the rotor assembly 20 on the whole.

[0055] In the embodiment of the present application, during the use of the motor-integrated pump, the rotor assembly 20 will rotate continuously, and the rotor assembly 20 is set as a circle as a whole to reduce the rotation resistance. Therefore, an arc-shaped boss 150 connected to the second shell 13 is set on the base 15. Exemplarily, the base 15 is also provided with a connecting groove 14.

[0056] The above description is only an implementation method of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present utility model, or directly or indirectly used in other related technical fields, should be included in the protection scope of the present utility model.

Claims

1. An axial flux motor integrated pump, characterized in that: include: a housing, the housing comprising a nozzle; A rotor assembly, the rotor assembly comprising a slotted plate, a sealed chamber and a water flowing chamber, the sealed chamber and the water flowing chamber being located on both sides of the slotted plate along a first direction, and the water flowing chamber being communicated with the pipe opening; A roller bearing, the roller bearing comprising an inner ring, an outer ring and a plurality of balls, the plurality of balls being embedded between the inner ring and the outer ring, the inner ring and the outer ring being able to rotate relative to each other, wherein the sealing chamber is arranged around the outer ring of the roller bearing; A stator assembly is provided with a stationary ring along the first direction toward the sealing chamber, and the stationary ring is matched with the inner ring of the roller bearing in a concave-convex manner, so that the stationary ring can rotate synchronously with the inner ring.

2. The axial flux motor integrated pump according to claim 1, characterized in that: The inner ring is provided with a first convex portion along a side facing the outer ring, and the first convex portion abuts against the ball; the outer ring is provided with a second convex portion along a side facing the inner ring, and the second convex portion abuts against the ball.

3. The axial flux motor integrated pump according to claim 1, characterized in that: The inner ring is provided with a first arc contact surface for abutting against the ball, and the outer ring is provided with a second arc contact surface for abutting against the ball; wherein the projections of the first arc contact surface and the second arc contact surface along the second direction are larger than a quarter arc of the projection of the ball along the second direction.

4. The axial flux motor integrated pump according to claim 3, characterized in that: The projected arc length of the first arc contact surface along the second direction is greater than the projected arc length of the second arc contact surface along the second direction.

5. The axial flux motor integrated pump according to claim 1, characterized in that: The stationary ring is provided with a convex portion along the first direction toward the roller bearing. The convex portion is embedded in the inner ring and has an interference fit with the inner ring.

6. The axial flux motor integrated pump according to claim 1, characterized in that: The water flow chamber is also provided with a plurality of spiral grooves, and the plurality of spiral grooves are bent in a clockwise or counterclockwise direction.

7. The axial flux motor integrated pump according to claim 1, characterized in that: The shell body also includes a first shell portion, a second shell portion and a plurality of connecting grooves, wherein the plurality of connecting grooves are circumferentially arranged on the shell body and penetrate the first shell portion along the first direction to extend to the second shell portion, wherein the stator assembly is located in the first shell portion and the rotor assembly is located in the second shell portion.

8. The axial flux motor integrated pump according to claim 1 or 7, characterized in that: The shell further comprises a base, which is connected to the first shell portion and the second shell portion respectively, wherein an arc-shaped boss is provided at the connection between the base and the second shell portion.

9. The axial flux motor integrated pump according to claim 1, characterized in that: The stator assembly is also provided with a heat sink on one side away from the pipe opening along the first direction.

10. The axial flux motor integrated pump according to claim 1, characterized in that: The material of the stationary ring is stainless steel.

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