Axial flux motor shield pump

Abstract

The utility model relates to the technical field of shield pumps, in particular to an axial flux motor shield pump. According to the utility model, metal parts such as the stator and rotor cores, the windings and the permanent magnets are isolated from a conveying medium through an integrated injection molding means of the stator shielding sleeve with a special structure and the rotor assembly, so that the problems of corrosion of the metal parts, insulation failure and the like caused by difficulty in isolation from the conveying medium when the axial magnetic flux motor is applied to a shield pump are solved; further, the axial flux motor is applied to the shield pump; meanwhile, rotor assembly unilateral magnetic pulling force generated by the single-stator single-rotor axial flux motor structure can balance part of axial force generated when the impeller operates, the axial force borne by the bearing is reduced, the service life of the bearing is prolonged, and then the service life of the whole pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of canned motor pumps, in particular to an axial flux motor canned motor pump. Background Art

[0002] In the prior art, the stator core of an axial flux motor is formed by stacking multiple silicon steel strips in sequence, and a winding is wound around the stator core to integrally form a stator. The silicon steel strips of the stator core are formed by stamping and shearing, which will cause the edges of the silicon steel strips to be usually sharp, and there will be many burrs at the edges. At this time, when directly winding the winding around the stator core, the sharp edges will wear the insulating layer of the winding, and at the same time, the burrs will pierce the insulating layer of the winding, thereby greatly reducing the insulating effect of the winding and causing the life of the motor to be damaged.

[0003] So, to solve the above problems, Patent CN212969228U discloses a method for preventing the winding from being worn or damaged. By providing an insulating chamfering component with a certain thickness and covering part of the edge of the silicon steel strip with the insulating chamfering component, the contact between the edge of the silicon steel strip and the winding is reduced, so that the stator core will not damage the insulating layer of the winding. However, since each insulating chamfering component is independent of each other, when winding the winding, it is necessary to attach each insulating chamfering component to the corresponding edge one by one first, and then wind it in circles to completely fix each insulating chamfering component on the stator core; and during the winding process, it is also necessary to try to avoid the insulating chamfering components not wound by the winding from falling off the stator core. The above process of winding with insulating chamfering components is relatively cumbersome, which increases the winding difficulty to a certain extent. At the same time, the insulating chamfering component cannot completely wrap the stator core, resulting in the risk of damaging the insulating layer of the winding at the edge of the stator core not wrapped by the insulating chamfering component during the winding process. Therefore, the current method of wrapping the stator core with insulating chamfering components needs to be improved. Summary of the Utility Model

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides an axial flux motor canned motor pump. Through the full wrapping effect of the coil skeleton, the stator core and the coil winding are separated from each other, avoiding the stator core from damaging the insulating layer of the coil winding.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An axial flux motor canned motor pump includes an axial flux motor with a stator assembly and a rotor assembly installed inside, and a pump body installed on the motor shaft of the axial flux motor. The stator assembly includes a plurality of stator blocks fixedly arranged evenly in the axial flux motor in sequence along the circumferential direction of the motor shaft. The stator block includes a stator core whose length direction is parallel to the axial direction of the motor shaft. The outer side of the stator core is completely covered with a coil skeleton, and a coil winding cooperating with the stator core is wound along the axial direction of the motor shaft on the outer side of the coil skeleton.

[0007] As a further scheme of the present utility model: the coil skeleton includes a wide skeleton and a narrow skeleton that can be buckled with each other along the width direction or the thickness direction of the stator core. A sealing cavity with the same shape as the stator core and used for encapsulating the stator core is formed inside the wide skeleton and the narrow skeleton after being buckled with each other.

[0008] As a further scheme of the present utility model: limiting plates extending outwards are arranged at both ends of the wide skeleton and the narrow skeleton; each limiting plate cooperates with the wide skeleton and the narrow skeleton when the wide skeleton and the narrow skeleton are buckled to form an annular groove for the coil winding to be wound on the outer sides of the wide skeleton and the narrow skeleton.

[0009] As a further scheme of the present utility model: the stator assembly further includes a stator shielding sleeve for fixedly installing each stator block. The stator shielding sleeve includes an inner layer stator shielding sleeve in a hollow cylindrical shape. An annular installation groove is coaxially opened on the outer circular surface of the inner layer stator shielding sleeve; positioning grooves are evenly opened along the circumferential direction of the inner layer stator shielding sleeve on the groove walls on both sides of the installation groove, and the groove length direction of each positioning groove extends along the radial direction of the inner layer stator shielding sleeve; positioning teeth are fixedly installed on the limiting plates at both ends of the wide skeleton and the narrow skeleton, and the positioning teeth are slidably embedded in the positioning grooves to sequentially and evenly install each positioning block on the inner layer stator shielding sleeve along the circumferential direction of the inner layer stator shielding sleeve;

[0010] An outer layer stator shielding sleeve is coaxially sleeved on the outer side of the inner layer stator shielding sleeve, and the inner circular surface of the outer layer stator shielding sleeve abuts against each stator block installed on the inner layer stator shielding sleeve to prevent each stator block from moving radially along the inner layer stator shielding sleeve;

[0011] As a further scheme of the present utility model: the rotor assembly includes a rotating shaft coaxially arranged and rotating inside the stator assembly, and the motor shaft is the rotating shaft; a disc-shaped rotor core is coaxially fixed on the rotating shaft, and a plurality of fan-shaped permanent magnets are evenly arranged in sequence along the circumferential direction of the rotor core on one side surface of the rotor core.

[0012] As a further solution of the present utility model: The pump body includes a casing for fixing the outer stator shielding sleeve and coaxially sleeved outside the outer stator shielding sleeve, and an impeller coaxially fixed to the front end of the rotating shaft; A front end cover is coaxially covered at the front end of the casing, and a water inlet hole is coaxially opened at the center of the front end cover; A rear end cover is coaxially covered at the rear end of the casing, and a water outlet hole is coaxially opened at the center of the rear end cover.

[0013] As a further solution of the present utility model: A front bearing seat is coaxially and fixedly installed inside the front end cover, and a front bearing is coaxially fixed at the center of the front bearing seat; A rear bearing seat is coaxially and fixedly installed inside the rear end cover, and a rear bearing is coaxially fixed at the center of the rear bearing seat; The front end of the rotating shaft is coaxially sleeved in the inner ring of the front bearing, and the rear end of the rotating shaft is coaxially sleeved in the inner ring of the rear bearing.

[0014] As a further solution of the present utility model: Internal threads are opened at the cover openings of the front end cover and the rear end cover, and external threads that are thread-mated with the internal threads are opened at both ends of the casing.

[0015] As a further solution of the present utility model: A plurality of front flow holes are sequentially opened along the circumferential direction of the front bearing seat; A plurality of rear flow holes are sequentially opened along the circumferential direction of the rear bearing seat; The water inlet hole, the front flow holes, the fitting clearance between the stator assembly and the rotor assembly, the rear flow holes, and the water outlet hole together cooperate to form a flow channel for the liquid to flow in the pump body.

[0016] As a further solution of the present utility model: A shielding sleeve wire outlet hole for the wiring of the coil winding to pass through is opened on the outer stator shielding sleeve, and a casing wire outlet hole that cooperates with the shielding sleeve wire outlet hole is opened on the casing.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] 1. Through the coil skeleton that completely wraps around the outside of the stator core, the present utility model can effectively separate the stator core and the coil winding from each other. Thus, when winding the coil winding, the edges and burrs of the stator core will not damage the insulating layer of the coil winding, thereby protecting the insulating performance of the coil winding to the greatest extent and maintaining a relatively long service life of the motor.

[0019] 2. By means of integrally injecting the inner and outer stator shielding sleeves and the rotor assembly, the present utility model completely isolates the metal part of the motor from the medium, avoiding the transport medium from corroding the metal part of the motor or affecting the insulation, so that the insulation performance and durability of the motor stator and rotor meet the requirements, enabling the transmission of some media such as corrosive, conductive or easily deteriorating media, and ensuring the safe operation of the pump at the same time.

[0020] 3. Compared with the conventional radial flux motor canned motor pump, the present utility model inherits the advantages of the axial flux motor compared with the radial flux motor, such as less material used, smaller volume, lighter weight, larger torque density and higher efficiency.

[0021] 4. The stator assembly and the rotor assembly of the present utility model can be completely exposed in the conveying medium, so that the medium directly carries away the heat generated by the coil winding, the stator and rotor cores and the permanent magnet during the transportation process, thereby stabilizing the working temperature, enabling the pump to operate at a higher working efficiency, improving the working stability of the pump, and reducing the energy consumption of the pump.

[0022] 5. The present utility model uses a single stator and single rotor axial flux motor structure. The permanent magnet on the rotor assembly will continuously receive a unilateral magnetic pulling force pointing to the stator core, and the impeller will also receive a reaction force from the conveying medium during operation. By integrally injecting the two with the rotor core, the mechanical strength of the rotor assembly can be improved, deformation of the rotor assembly can be avoided, and the working stability of the pump is improved; in addition, the directions of the unilateral magnetic pulling force and the reaction force received by the impeller are opposite, which can offset a part of the reaction force received by the impeller, and the axial force received by the rotating shaft is reduced when transmitted to the rotating shaft, prolonging the service life of the bearing and further improving the working stability of the pump. Description of the Drawings

[0023] Figure 1 It is a schematic internal structure diagram of the axial flux canned motor pump according to the embodiment of the present utility model.

[0024] Figure 2 It is an exploded structure diagram of the axial flux canned motor pump according to the embodiment of the present utility model

[0025] Figure 3 It is an exploded structure diagram of the stator assembly in the embodiment of the present utility model.

[0026] Figure 4 It is an exploded structure diagram of the stator block in the embodiment of the present utility model.

[0027] Figure 5 It is an assembly structure diagram of the stator block and the inner layer shielding sleeve in the embodiment of the present utility model.

[0028] Figure 6 It is an exploded structure diagram of the rotor assembly in the embodiment of the present utility model.

[0029] Figure 7 It is a schematic diagram of the mechanism of the protrusion and the pit in the embodiment of the present utility model.

[0030] In the figure: 1. Pump body; 11. Housing; 111. Housing wire outlet hole; 12. Front end cover; 121. Water inlet hole; 122. Front bearing seat; 1221. Front flow-through hole; 123. Front bearing; 13. Rear end cover; 131. Water outlet hole; 132. Rear bearing seat; 1321. Rear flow-through hole; 133. Rear bearing; 2. Rotating shaft; 3. Stator assembly; 31. Stator block; 311. Stator core; 312. Coil skeleton; 3121. Wide skeleton; 3122. Narrow skeleton; 3123. Positioning teeth; 31231. Protrusion; 313. Coil winding; 32. Stator shielding sleeve; 321. Inner stator shielding sleeve; 3211. Positioning groove; 32111. Pit; 322. Outer stator shielding sleeve; 3221. Shielding sleeve wire outlet hole; 4. Rotor assembly; 41. Rotor core; 42. Permanent magnet; 43. Impeller. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1 to 6 , the present invention is an axial flux motor canned pump, including a coaxial pump body 1, a rotating shaft 2, a stator assembly 3 and a rotor assembly 4, adopting a single stator and single rotor structure. The rotating shaft 2, the stator assembly 3 and the rotor assembly 4 are all installed inside the pump body 1. The rotating shaft 2 is installed inside the pump body 1 through the front bearing 123 and the rear bearing 133, and is in a rotating state relative to the pump body 1.

[0033] As Figure 2 shown, the pump body 1 includes a coaxial housing 11, a front end cover 12 and a rear end cover 13. The front end cover 12 is provided with a water inlet hole 121, a front bearing seat 122 and a front bearing 123, and the front bearing seat 122 is provided with a front flow-through hole 1221. The rear end cover 13 is provided with a water outlet hole 131, a rear bearing seat 132 and a rear bearing 133, and the rear bearing seat 132 is provided with a rear flow-through hole 1321.

[0034] The stator assembly 3 includes a number of identical stator blocks 31 pointing to the same axis and a pair of stator shielding sleeves 32. The stator blocks 31 are installed inside the stator shielding sleeves 32, and the stator assembly 3 is installed on the inner wall of the housing 11 on one side of the rear end cover 13 of the pump body 1, and is in a stationary state relative to the pump body 1.

[0035] The number of stator blocks 31 can be determined according to actual requirements. In the embodiment of the present utility model, the number of stator blocks 1 is 12. Each stator block 31 includes a stator core 311, a pair of coil skeletons 312, and a coil winding 313. The stator core 311 is installed inside the coil skeleton 312, and the coil winding 313 is wound outside the coil skeleton 312. The top view shape of the stator core 311 is a trapezoid with chamfers according to requirements, which conforms to the characteristics of the inner diameter of the ring being small and the outer diameter being large, making full use of the space to accommodate silicon steel sheets with a larger volume and reducing the magnetic resistance of the magnetic circuit. The stator core 311 is formed by chamfering after connecting silicon steel sheets with the same height and gradually decreasing width layer by layer while maintaining the same center line. Each layer of silicon steel sheet is formed by stamping or wire cutting of silicon steel sheets of the same grade and is connected by welding, snap points, gluing, etc.

[0036] One coil skeleton 312 includes a wide skeleton 3121 and a narrow skeleton 3122. The coil skeleton 312 can be made by injection molding, 3D printing, machining, etc. The internal space size and shape are the same as the external dimensions of the stator core 311 after the wide skeleton 3121 and the narrow skeleton 3122 are spliced. The inside of the wide skeleton 3121 is closely attached to the bottom of the stator core 311, and the inside of the narrow skeleton 3122 is closely attached to the rest of the stator core 111. The two need to completely wrap the stator core 311 to prevent the insulation layer of the coil winding 313 from being damaged during the winding of the coil winding 313, resulting in unqualified insulation.

[0037] Limit plates extending outward are arranged at both ends of the wide skeleton 3121 and the narrow skeleton 3122. When the wide skeleton 3121 and the narrow skeleton 3122 are buckled, each limit plate cooperates with the wide skeleton 3121 and the narrow skeleton 3122 to form an annular groove for the coil winding 313 to wind around the outside of the wide skeleton 3121 and the narrow skeleton 3122. And the height of this annular groove is greater than the height of the wire package of the coil winding 313 to limit the coil winding 313 to be flush with the stator core 311. The coil winding 313 is wound in the winding groove of the coil skeleton 312. Specifically, the winding method can choose manual winding or winding machine winding.

[0038] The stator shielding sleeve 32 includes an inner stator shielding sleeve 321 and an outer stator shielding sleeve 322. The middle section of the inner stator shielding sleeve 321 is recessed inward to form a mounting groove, and is provided with a plurality of positioning grooves 3211. The positioning grooves 3211 have the same size as the positioning teeth 3123 protruding along the center line on both sides of the coil bobbin 312. The number of the positioning grooves 3211 is equal to the number of stator blocks 31 and is evenly distributed at the same mechanical angle intervals. The stator blocks 31 are installed and fixed through the cooperation of the positioning teeth 3211 and the positioning grooves 3123, so that the stator blocks are evenly distributed. The number of stator blocks 31 is 12, so there are 12 rectangular positioning grooves 3211 in the middle section of the inner stator shielding sleeve 321. The center lines of adjacent grooves are spaced at a mechanical angle of 30° for installing and fixing the stator blocks 31. The rectangular positioning grooves 3211 are also used to bear the radial force received by the stator blocks 31, and other positions in the middle section of the inner stator shielding sleeve 321 are used to bear the axial force received by the stator blocks 31.

[0039] The cross-section of the positioning teeth 3123 is T-shaped, and the cross-section of the positioning grooves 3211 is T-shaped that matches the positioning teeth 3123. The cooperation of the T-shaped groove and the T-shaped block can effectively improve the connection strength between the positioning teeth 3123 and the positioning grooves 3211.

[0040] As Figure 7 shown, the tooth surface of the positioning teeth 3123 is provided with protruding protrusions 31231, and the bottom of the positioning grooves 3211 is recessed with pits 32111 that cooperate with the protrusions 31231. During installation, when the positioning teeth 3123 are inserted into the positioning grooves 3211, the protrusions 31231 are elastically embedded into the pits 32111, thereby improving the connection strength between the positioning teeth 3123 and the positioning grooves 3211. Thus, when the outer stator shielding sleeve 322 is removed, the positioning teeth 3123 on the inner stator shielding sleeve 321 will not slide off the inner stator shielding sleeve 321 under the action of gravity due to the engagement of the pits 32111 and the protrusions 31231, improving the stability and safety of disassembly and assembly.

[0041] The shape of the outer stator shielding sleeve 322 is cylindrical, and the height is the same as that of the inner stator shielding sleeve 321. A shielding sleeve wire outlet hole 3221 is provided at the position corresponding to the middle section of the outer stator shielding sleeve 322 and the inner stator shielding sleeve 321. The housing 11 is provided with a housing wire outlet hole 111 at the installation position corresponding to the stator assembly 3 for leading out the power line.

[0042] In the embodiment of the present utility model, one end of the narrow skeletons 3122 of several stator blocks 31 points to the same center of the circle. Through the cooperation of the positioning teeth 3123 protruding along the center line on the upper and lower surfaces of the coil skeleton 312 and the positioning grooves 3211 of the inner stator shielding sleeve 321, they are inserted into the middle section of the inner stator shielding sleeve 321 at the same mechanical angle intervals. Then, according to the winding expansion diagram, both ends of the coil windings 313 of several stator blocks 31 are welded, and three-phase lead-out wires are welded to obtain a complete motor stator. After 12 stator blocks 31 are installed inside the middle section of the inner stator shielding sleeve 321, both ends of the coil windings 313 of each stator block are welded according to requirements, and the three-phase power supply wires are fixed at the same position and laid flat. Then, the middle section inside the inner stator shielding sleeve 321 is potted with epoxy resin or other curable and good heat-conducting materials to improve the heat dissipation performance of the high stator assembly 3.

[0043] The outer stator shielding sleeve 322 is installed outside the inner stator shielding sleeve 321 and the motor stator, and both ends are in full contact with both ends of the inner stator shielding sleeve 321. The inner circular surface of the outer stator shielding sleeve 322 abuts against each stator block 31 installed on the inner stator shielding sleeve 321 to prevent each stator block 31 from moving radially along the inner stator shielding sleeve 321. Specifically, the welded motor stator and the inner stator shielding sleeve 321 are installed together into the outer stator shielding sleeve 322. There is a circular ring protrusion on the outer side of the leftmost end of the inner stator shielding sleeve 321, and its outer diameter is the same as the outer diameter of the outer stator shielding sleeve 322. There is a circular ring protrusion on the inner side of the rightmost end of the outer stator shielding sleeve 322. These two protrusions play a positioning role and are convenient for subsequent welding. The positions of the three-phase power supply wires are aligned with the shielding sleeve wire outlet holes 3221, and the shielding sleeve wire outlet holes 3221 are aligned with the housing wire outlet holes 111 to facilitate the lead-out of the power supply wires. After the stator blocks 31 and the stator shielding sleeve 32 are installed, the two ends of the outer stator shielding sleeve 322 and the inner stator shielding sleeve 321 are completely welded. Except for the shielding sleeve wire outlet holes 3221, the stator blocks 31 have no contact with the outside.

[0044] After the two ends of the stator shielding sleeve 32 are completely welded, during the operation of the motor, the stator shielding sleeve 32 can effectively isolate the contact between the conveyed medium and the motor stator, avoiding the conveyed medium from corroding metal parts such as the stator iron core 311 and the coil windings 313 or affecting the insulation, so that the insulation performance and durability of the stator assembly meet the requirements, realizing the transmission of some media such as corrosive, conductive or easily deteriorating media, and at the same time ensuring the safe operation of the pump.

[0045] The rotor core 41 is formed by connecting or directly rolling multiple silicon steel sheets with the same height while maintaining the same center line, and its outer shape is circular. A number of permanent magnets 42 are evenly fixed on one side of the rotor core 41 at the same mechanical angle intervals. The distance from the permanent magnet 42 to the rotating shaft 2 is close to the distance from the stator core 311 to the rotating shaft, and the radial length of the permanent magnet 42 is close to the radial length of the stator core 311. Specifically, the number of permanent magnets 42 is 10, and its distance to the rotating shaft 2 and radial length are the same as those of the stator core 311, so as to reduce the magnetic resistance of the motor magnetic circuit, improve the power density and load-carrying capacity of the pump. After the 10 permanent magnets 42 are fixed on one side of the rotor core 41, they are fixed in a mold for injection molding, and the impeller 43 is injection molded on the other side of the rotor core 41. The injection molding material can be selected according to different requirements for corrosion resistance and insulation performance. The means of integrated injection molding can isolate the permanent magnet 42 and the rotor core 41 from the conveying medium, improve the corrosion resistance of the rotor assembly, realize the transmission of some media such as corrosive, conductive or easily deteriorated media, and ensure the safe operation of the pump at the same time.

[0046] The permanent magnet 42 is continuously subjected to a unilateral magnetic pull force directed towards the stator core 311, and the impeller 43 is also subjected to a reaction force from the conveying medium during operation; the rotor core 41 can not only be used as part of the magnetic circuit to reduce the magnetic resistance, but also improve the mechanical strength of the rotor assembly, avoid deformation of the rotor assembly, and improve the working stability of the pump. The above-mentioned unilateral magnetic pull force and reaction force are in opposite directions, and when transmitted to the rotating shaft 2, it is manifested as a reduction in the axial force received by the rotating shaft 2, extending the service life of the bearing and further improving the working stability of the pump.

[0047] The flow direction of the medium conveyed through the flow passage in the pump is: water inlet hole 121 → front flow hole 1221 → impeller 43 → outside the rotor assembly 4 → flow gap between the stator assembly 3 and the rotor assembly 4 → inside the stator assembly 3 → rear flow hole 1321 → water outlet hole 131. During the flow of the medium, the stator assembly 3 and the rotor assembly 4 are completely exposed in the conveying medium, so that the medium directly carries away the heat generated by the coil winding 313, the stator core 311, the rotor core 41 and the permanent magnet 42 during transportation, thereby stabilizing the working temperature, enabling the pump to operate at a higher working efficiency, improving the working stability of the pump, and reducing the energy consumption of the pump.

[0048] The axial flux shielded pump of the embodiment of the present utility model inherits the advantages of the axial flux motor, such as less material used, small volume, light weight, large torque density and high efficiency. And because the speed and output torque of the permanent magnet motor can be adaptively adjusted, by adjusting the speed of the permanent magnet motor, the adjustment of the output flow rate of the pump can be realized, so as to meet the adjustment requirements of consumers for the water output during use.

[0049] In summary, the axial flux motor canned pump described in the embodiments of the present utility model applies a novel shielding structure for the stator assembly 3, which meets the insulation performance requirements of the pump for the stator assembly 3, enables the axial flux motor to be applied in the canned pump of the embodiments of the present utility model, realizes the transmission of some media such as corrosive, conductive or easily deteriorating media, ensures its safe operation, improves the working stability, reduces the energy consumption during use, and enables the pump to inherit the advantages of the axial flux motor such as less material consumption, small volume, light weight, large torque density and high efficiency. And it cleverly uses the unidirectional magnetic pull generated by the axial flux motor structure of a single stator and a single rotor to balance part of the axial force generated during the operation of the impeller 43, further improving the operation stability of the pump.

[0050] The above is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An axial flux motor shielded pump, characterized in that, An axial flux motor including a stator assembly (3) and a rotor assembly (4) installed inside, and a pump body (1) installed on the motor shaft of the axial flux motor. The stator assembly (3) includes a plurality of stator blocks (31) fixedly arranged circumferentially along the motor shaft inside the axial flux motor in sequence and evenly. The stator block (31) includes a stator core (311) whose length direction is parallel to the axial direction of the motor shaft. The outer side of the stator core (311) is completely covered with a coil skeleton (312). The outer side of the coil skeleton (312) is wound with a coil winding (313) that cooperates with the stator core (311) along the axial direction of the motor shaft.

2. The axial flux motor shield pump according to claim 1, characterized in that, The coil skeleton (312) includes a wide skeleton (3121) and a narrow skeleton (3122) that can be snapped together along the width direction or the thickness direction of the stator core (311). After being snapped together, a sealing cavity is formed inside the wide skeleton (3121) and the narrow skeleton (3122), which has the same shape as the stator core (311) and is used to encapsulate the stator core (311).

3. The axial flux motor shielded pump according to claim 2, wherein, Limiting plates extending outward are arranged at both ends of the wide skeleton (3121) and the narrow skeleton (3122). When the wide skeleton (3121) and the narrow skeleton (3122) are snapped together, each limiting plate cooperates with the wide skeleton (3121) and the narrow skeleton (3122) to form an annular groove for the coil winding (313) to be wound on the outer sides of the wide skeleton (3121) and the narrow skeleton (3122).

4. The axial flux motor shield pump according to claim 3, characterized in that, The stator assembly (3) further includes a stator shield sleeve (32) for fixedly installing each stator block (31). The stator shield sleeve (32) includes an inner layer stator shield sleeve (321) in the shape of a hollow cylinder. An annular installation groove is coaxially opened on the outer circular surface of the inner layer stator shield sleeve (321). Positioning grooves (3211) are evenly opened along the circumferential direction of the inner layer stator shield sleeve (321) on both side walls of the installation groove, and the groove length direction of each positioning groove (3211) extends along the radial direction of the inner layer stator shield sleeve (321). Positioning teeth (3123) are fixedly installed on the limiting plates at both ends of the wide skeleton (3121) and the narrow skeleton (3122). The positioning teeth (3123) are slidably inserted into the positioning grooves (3211) to sequentially and evenly install each positioning block on the inner layer stator shield sleeve (321) along the circumferential direction of the inner layer stator shield sleeve (321). An outer layer stator shield sleeve (322) is coaxially sleeved on the outer side of the inner layer stator shield sleeve (321), and the inner circular surface of the outer layer stator shield sleeve (322) abuts against each stator block (31) installed on the inner layer stator shield sleeve (321) to prevent each stator block (31) from moving radially along the inner layer stator shield sleeve (321).

5. The axial flux motor shielded pump according to claim 4, characterized in that, The cross-section of the positioning tooth (3123) is T-shaped, and the cross-section of the positioning groove (3211) is T-shaped and matches the positioning tooth (3123). A convex protrusion (31231) is arranged on the tooth surface of the positioning tooth (3123), and a concave pit (32111) matching the protrusion (31231) is recessed at the bottom of the positioning groove (3211).

6. An axial flux motor shielded pump according to any one of claims 1-5, characterized in that The rotor assembly (4) includes a rotating shaft (2) coaxially and rotatably arranged inside the stator assembly (3), and the motor shaft is the rotating shaft (2); a disc-shaped rotor core (41) is coaxially and fixedly connected to the rotating shaft (2), and a plurality of sector-shaped permanent magnets (42) are sequentially and evenly arranged along the circumferential direction of the rotor core (41) on one side surface of the rotor core (41).

7. The axial flux motor canned pump according to claim 6, wherein The pump body (1) includes a pump housing (11) for fixing the outer stator shielding sleeve (322) and coaxially sleeved outside the outer stator shielding sleeve (322), and an impeller (43) coaxially and fixedly connected to the front end of the rotating shaft (2); a front end cover (12) is coaxially covered at the front end of the pump housing (11), and a water inlet hole (121) is coaxially opened at the center of the front end cover (12); a rear end cover (13) is coaxially covered at the rear end of the pump housing (11), and a water outlet hole (131) is coaxially opened at the center of the rear end cover (13).

8. The axial flux motor shielded pump according to claim 7, characterized in that, A front bearing seat (122) is coaxially and fixedly installed inside the front end cover (12), and a front bearing (123) is coaxially and fixedly connected to the center of the front bearing seat (122); a rear bearing seat (132) is coaxially and fixedly installed inside the rear end cover (13), and a rear bearing (133) is coaxially and fixedly connected to the center of the rear bearing seat (132); the front end of the rotating shaft (2) is coaxially sleeved in the inner ring of the front bearing (123), and the rear end of the rotating shaft (2) is coaxially sleeved in the inner ring of the rear bearing (133); internal threads are opened at the cover openings of the front end cover (12) and the rear end cover (13), and external threads that are thread-mated with the internal threads are opened at both ends of the pump housing (11).

9. The axial flux motor shielded pump according to claim 8, characterized in that, A plurality of front flow holes (1221) are sequentially opened along the circumferential direction of the front bearing seat (122); a plurality of rear flow holes (1321) are sequentially opened along the circumferential direction of the rear bearing seat (132); the water inlet hole (121), the front flow holes (1221), the clearance between the stator assembly (3) and the rotor assembly (4), the rear flow holes (1321), and the water outlet hole (131) jointly cooperate to form a flow channel for the liquid to flow inside the pump body (1).

10. The axial flux motor shield pump according to claim 8, characterized in that, A shielding sleeve wire outlet hole (3221) for the wiring of the coil winding (313) to pass through is opened on the outer stator shielding sleeve (322), and a pump body wire outlet hole (111) that cooperates with the shielding sleeve wire outlet hole (3221) is opened on the pump housing (11).

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