Electromagnetic shaftless water pump

Abstract

This invention discloses an electromagnetic shaftless water pump, aiming to solve the problems of low driving efficiency and limited functionality of traditional water pumps. The pump mainly includes a pump casing, a stator core, and a rotor core. The rotor core has a pump channel with a helical impeller at its center. The rotor core selectively transmits power to a bottom mounting ring via a transmission assembly. The mounting ring securely mounts cutting tools. The transmission assembly controls the sliding of a spline sleeve via an electromagnet, enabling the connection or disconnection of power between the rotor core and the mounting ring, thus flexibly switching between pure pumping mode and a combined pumping and cutting tool operation mode. This invention achieves integrated high-efficiency pumping and underwater treatment functions.

Description

Technical Field

[0001] This invention relates to the field of water pump technology, specifically to an electromagnetic shaftless water pump. Background Technology

[0002] In the field of fluid transport and underwater operations, water pumps are widely used as core equipment in various scenarios such as municipal sewage discharge, agricultural irrigation, river dredging, and industrial circulating water systems. Traditional water pumps typically use a structure in which an electric motor drives the impeller to rotate through a mechanical transmission shaft. This long shaft design has the following inherent defects: First, long shaft systems are prone to flexural deformation and vibration, which affects operational stability and reduces mechanical efficiency. Second, traditional structures have a single function, only capable of pumping fluid. If underwater cutting, stirring or crushing operations are required simultaneously, an independent drive device must be provided, resulting in a complex system, high cost and large space occupation. To address the aforementioned issues, shaftless pump technology has emerged. Some existing electromagnetic shaftless pumps integrate the motor stator and rotor into the pump casing and impeller components respectively, eliminating the physical drive shaft and simplifying the structure to some extent. However, the function of this type of pump is still limited to pumping operations and cannot meet the growing demand for integrated and complex operations. For example, in river dredging scenarios, operators often need to first use a crushing device to remove debris from the bottom mud and then use a water pump to suck up the slurry. The process is cumbersome and requires the coordination of multiple devices. Summary of the Invention

[0003] In view of the above-mentioned shortcomings in the existing technology, the purpose of this invention is to provide an electromagnetic shaftless water pump with high driving efficiency and multiple functions.

[0004] The technical solution adopted by the present invention to achieve the above objectives is as follows: an electromagnetic shaftless water pump, comprising a pump casing, a stator core, and a rotor core. The stator core is fixedly connected inside the pump casing, and the rotor core is disposed inside the stator core. A pump channel is provided in the middle of the rotor core, and multiple sets of impellers are fixedly connected to the inner wall of the pump channel. An upper bearing assembly is provided on the top of the pump casing in conjunction with the rotor core, and a lower bearing assembly is provided on the bottom of the pump casing in conjunction with the rotor core. The bottom end of the rotor core extends out of the pump casing, and a bottom cover is fixedly connected to the bottom of the pump casing. An installation ring is rotatably connected inside the bottom cover. The installation ring is rotatably connected to the bottom of the rotor core, and a transmission assembly is used to achieve power connection or power disconnection between the installation ring and the rotor core. The installation ring is used to install cutting tools.

[0005] In the above technical solution, the stator core includes a stator body and a stator winding disposed on the stator body; The rotor core includes a rotor body and multiple sets of permanent magnets disposed inside the rotor body.

[0006] In the above technical solution, the structure of the upper bearing assembly is as follows: the upper bearing assembly includes a fixed pressure ring, a first upper sealing bearing, and a second upper sealing bearing; the rotating core body is provided with multiple sets of mounting holes; each set of mounting holes is provided with the permanent magnet; the fixed pressure ring is fixedly connected to the rotating core body by bolts and seals the mounting holes. In addition, the top of the pump housing is provided with a bearing cavity, the fixed pressure ring is located in the bearing cavity, the fixed pressure ring includes an upper sealing part and a lower sealing part, a first upper sealing bearing is provided between the lower sealing part and the bearing cavity, and a second upper sealing bearing is provided between the upper sealing part and the bearing cavity; Furthermore, the lower bearing assembly structure includes a lower sealed bearing and a lower bearing platform. The lower bearing platform is fixedly connected to the bottom end of the pump housing, and the lower sealed bearing is provided on the lower bearing platform. The lower sealed bearing cooperates with the rotating core body. Furthermore, a pump cover is fixedly connected to the top of the pump casing, and a water outlet pipe is fixedly connected to the pump cover; The bottom cover is provided with a water inlet corresponding to the mounting ring, and a water inlet cover is detachably and fixedly connected to the bottom cover corresponding to the water inlet.

[0007] In the above technical solution, the transmission method between the mounting ring and the rotor core is as follows: the bottom end of the rotor core body is provided with a flange, and a transmission cylinder is fixedly connected to the flange by bolts. The transmission cylinder is coaxially arranged with the rotor core body, and the bottom end of the transmission cylinder is rotatably connected to the mounting ring. The transmission cylinder is coaxially arranged with the mounting ring. The transmission cylinder and the mounting ring are poweredly connected via the transmission assembly.

[0008] In the above technical solution, the specific structure of the transmission assembly is as follows: The transmission assembly includes an upper gear ring, a lower gear ring, a first gear, a second gear, and an electromagnet. The upper gear ring is fixedly connected to the transmission cylinder, and the lower gear ring is fixedly connected to the mounting ring. The first gear is rotatably connected to the lower gear ring inside the bottom cover via a first transmission shaft. The first gear meshes with the lower gear ring. The bottom cover contains a second gear located on one side of the upper gear ring, which is rotatably connected to the second gear via a second transmission shaft. The second gear meshes with the upper gear ring. The first transmission shaft and the second transmission shaft are coaxially arranged. The first drive shaft has a first spline portion at its top and a second spline portion at its bottom. A spline sleeve is provided between the first drive shaft and the second drive shaft. The spline sleeve has a spline hole, which is slidably splinedly connected to the first spline portion and the second spline portion. A spring is provided between the second gear and the spline sleeve. One end of the spring is fixedly connected to the spline sleeve, and the other end is fixedly connected to the second gear. A drive arm is rotatably connected to the spline sleeve, and the drive arm is slidably connected inside the bottom cover. The electromagnet is fixedly connected inside the bottom cover, and an adsorption platform is fixedly connected to the drive arm corresponding to the electromagnet. When the electromagnet adsorbs the adsorption platform, the spline hole disengages from the first spline part. Furthermore, a rotating ring is fixedly connected to the spline sleeve, and the drive arm includes a traction part and an adsorption part fixedly connected to the traction part. The traction part is provided with a rotating hole, and an annular groove is provided on the inner wall of the rotating hole. The spline sleeve is located in the rotating hole, and the rotating ring is located in the annular groove. A guide column is fixedly connected inside the bottom cover, the adsorption part is slidably connected to the guide column, and the adsorption platform is fixedly connected to the adsorption part.

[0009] In the above technical solution, the impeller is an integrally spiral impeller, which can be a single spiral or multiple spirals; Furthermore, when the spiral impeller is multi-spiral, the spiral impeller is a constant pitch impeller or a variable pitch impeller; Furthermore, the cross-section of the helical impeller is a rectangular cross-section or a trapezoidal cross-section.

[0010] In the above technical solution, the bottom of the bottom cover is provided with a mounting threaded groove, and the top of the water inlet cover is provided with a threaded part, which is threadedly connected to the mounting threaded groove. The water inlet cover can be replaced with a water inlet pipe.

[0011] In the above technical solution, a mounting ear is fixedly connected inside the mounting ring, and the cutting tool includes a tool holder and a cutting tool body fixedly connected to the tool holder. The tool holder and the mounting ear are fixedly connected by fasteners. The blade body is a spiral blade, a reamer, or a shredder.

[0012] The beneficial effects of this invention are: 1. When the stator winding is energized, it generates a rotating magnetic field that acts directly on the permanent magnet in the rotor core, producing electromagnetic torque to drive the rotor to rotate. At this time, the impeller inside the pump channel rotates, thereby achieving the pumping effect. This structure eliminates the long chain mechanical transmission of motor, coupling, pump shaft, and impeller in traditional water pumps, greatly reducing mechanical transmission losses. Energy is directly converted from electrical energy into the mechanical energy of the impeller and the function of water flow, resulting in higher driving efficiency. Furthermore, the electromagnetic torque acts directly on the rotor core, and the response speed of starting, stopping, and speed changing is far superior to that of mechanical transmission, facilitating precise flow and pressure control. At the same time, the elimination of the long shaft system simplifies the overall structure and reduces the design and manufacturing difficulties caused by long shaft deflection and vibration. 2. The permanent magnets in the rotor core are completely enclosed and sealed in the rotor core body, while the stator core is fixed to the pump casing. The pumped medium only passes through the pump channel and the internal impeller, which completely isolates the core electromagnetic components such as the stator winding from the liquid. This avoids the risk of water leakage in the motor compartment faced by traditional submersible pumps, resulting in high reliability and safe transportation of liquids containing mud and sand and slightly corrosive substances. 3. The drive arm is controlled by an electromagnet, which moves the spline sleeve up and down, thereby realizing the power transmission or disconnection between the first and second drive shafts. When the electromagnet is energized, it attracts the adsorption platform, and the spring on the spline sleeve slides down, causing the first spline part to disengage from the spline sleeve. At this time, the rotor core rotates, while the bottom mounting ring and cutter remain stationary. All power is concentrated on increasing water pressure and flow. When the electromagnet is de-energized, the spring pushes the spline sleeve down, causing the spline sleeve to engage with the first spline part at the same time. The power of the rotor core simultaneously drives the upper impeller and the bottom mounting ring and its cutter, realizing the simultaneous operation of water pumping and stirring or crushing or cutting. In this way, users can flexibly switch modes by changing different cutters according to the on-site working conditions (such as whether dredging is required, whether impurities need to be crushed, whether mud or large particles in the water need to be stirred), maximizing the utilization rate of the equipment. It has diverse functions and good flexibility. 4. The impeller adopts a helical impeller composed of continuous or segmented helical lines. Compared with traditional discrete blades, the helical propulsion generates continuous and uniform axial flow, which significantly reduces the turbulence and pressure pulsation caused by traditional blades. It is quieter in operation and has less impact on pipelines and systems. At the same time, the flow channel inside the pump is wide and continuous, and it is not easily blocked by fibrous or particulate debris, making it especially suitable for sewage containing solids. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention after the cutting tool is installed; Figure 2 This is a schematic diagram of the structure of the present invention without the tool installed; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 This is an exploded view of the bottom cover and water inlet cover in this invention; Figure 5 This is an exploded view of the cutting tool and the mounting ring in this invention; Figure 6 This is a schematic diagram of the pump casing structure in this invention; Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of AA; Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure of BB; Figure 9 This is a schematic diagram of the structure of the transmission component in the present invention when it is powered. Figure 10 This is a schematic diagram of the transmission component in the present invention from another angle when it is powered. Figure 11 This is a schematic diagram of the transmission component when the power is cut off in this invention; Figure 12 This is an exploded structural diagram of the first drive shaft, the second drive shaft, and the spline sleeve in this invention.

[0014] In the diagram: 100 Pump casing, 101 Pump cover, 102 Outlet pipe, 103 Bottom cover, 104 Inlet, 105 Mounting thread groove, 106 Bearing cavity, 107 Inlet cover, 1071 Threaded part; 200 stator core, 201 stator core body, 202 stator winding; 300 Rotor inner core, 301 Rotor core body, 3011 Flange, 302 Permanent magnet, 303 Fixed pressure ring, 3031 Upper sealing part, 3032 Lower sealing part, 304 Pump passage; 400 impeller; 500 Upper bearing assembly, 501 First upper sealed bearing, 502 Second upper sealed bearing; 600 Lower bearing assembly, 601 Lower bearing base, 602 Lower sealed bearing; 700 transmission cylinder; 800 mounting ring, 801 mounting lug; 900 cutting tool, 901 tool holder, 902 tool body; 1000 Transmission assembly, 1001 Upper gear ring, 1002 Lower gear ring, 1003 First gear, 1004 Second gear, 1005 Electromagnet, 1006 First drive shaft, 1007 Second drive shaft, 1008 First spline section, 1009 Second spline section, 1010 Spring, 1011 Drive arm, 1012 Traction section, 1013 Adsorption section, 1014 Rotating ring, 1015 Ring groove, 1016 Guide post, 1017 Spline sleeve. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figures 1-12 As shown, this embodiment discloses an electromagnetic shaftless water pump, including a pump casing 100, a stator core 200, and a rotor core 300. Please refer to... Figure 1 , Figure 4 , Figure 5 The pump casing 100 constitutes the main support and flow channel shell of the water pump. The pump casing 100 is cylindrical in shape. The top of the pump casing 100 is fixedly connected to the pump cover 101 by bolts. The center of the pump cover 101 is provided with a water outlet pipe 102 for connecting the water outlet pipe 102. The bottom of the pump casing 100 is fixedly connected to a bottom cover 103 to form a lower cavity. The bottom of the bottom cover 103 is provided with a water inlet 104. The water inlet 104 is provided with a mounting thread groove 105. A water inlet cover 107 is detachably installed in the mounting thread groove 105 by a threaded connection. Specifically, the top of the water inlet cover 107 is provided with a threaded part 1071, which is threadedly connected in the mounting thread groove 105. The water inlet cover 107 can be replaced with a directly connected water inlet pipe as needed. Furthermore, please refer to Figure 3 , Figures 6-8 The stator core 200 is fixedly installed in the middle of the inner wall of the pump casing 100. The stator core 200 includes an annular stator body 201 and stator windings 202 embedded in the slots of the stator body 201 according to a certain pattern. When multiphase alternating current is applied to the stator windings 202, a rotating magnetic field will be generated in its internal space. The rotor core 300 is coaxially disposed in the internal cavity of the stator core 200. The rotor core 300 includes a cylindrical rotating core body 301. Multiple sets of mounting holes are opened along the axial direction in the circumferential wall of the rotating core body 301. Each set of mounting holes is fixedly embedded with a high-performance permanent magnet 302 (such as neodymium iron boron magnet). These permanent magnets 302 interact with the rotating magnetic field generated by the stator winding 202. The opening end of the mounting hole is tightly sealed by a ring-shaped fixing pressure ring 303 with bolts to ensure that the permanent magnets 302 are completely sealed in the rotating core body 301, thereby isolating them from the pumping medium. Under the action of electromagnetic force, the rotor core 300 can rotate freely around its central axis relative to the fixed stator core 200 and pump casing 100. A pump channel 304 is provided in the middle of the rotor core 300. An impeller 400 is fixedly connected to the inner wall of the pump channel 304. To ensure stable and reliable high-speed rotation of the rotor core 300 and to achieve sealing, an upper bearing assembly 500 and a lower bearing assembly 600 are respectively provided at the top and bottom of the pump housing 100. Specifically, a bearing cavity 106 is provided at the top of the pump housing 100, and a fixing ring 303 is located in the bearing cavity 106. The fixing ring 303 includes an upper sealing part 3031 and a lower sealing part 3032. A second upper sealing bearing 502 is installed between the upper sealing part 3031 and the inner wall of the bearing cavity 106, and a first upper sealing bearing 501 is installed between the lower sealing part 3032 and the inner wall of the bearing cavity 106. These two bearings jointly bear radial force and a certain axial force, and form two sealing barriers for the cavity at the top of the pump housing 100 to prevent high-pressure liquid from flowing upward. In addition, a lower bearing base 601 is fixedly installed at the bottom of the pump casing 100, and a lower sealing bearing 602 is installed at the center of the lower bearing base 601. The bottom journal of the rotor inner core 300 is supported in the lower sealing bearing 602. The lower bearing base 601 and the bottom cover 103 together form the sealing and protection space of the bottom bearing. Furthermore, in order to efficiently and smoothly transport fluids, especially media that may contain solid particles, the impeller 400 is designed as an integrally helical impeller 400. Multiple helical impellers 400 are fixedly connected axially at intervals to the inner wall of the rotor core 300, i.e., the inner wall of the pump channel 304. The helical impeller 400 can be designed as a single helix or multiple helices. When the helical impeller 400 is multiple helices, it is a constant pitch impeller 400 or a variable pitch impeller 400. In addition, the cross-section of the helical impeller 400 is a rectangular cross-section or a trapezoidal cross-section. In an optimized scheme, a multi-head variable pitch helical impeller 400 is adopted, and its blade cross-section is trapezoidal. This design can generate continuous and uniform axial thrust, effectively reduce flow pulsation and local eddies, and at the same time, the wide flow channel is not easy to be blocked, improving the pump's throughput and working efficiency. Furthermore, please refer to Figure 3 , Figure 8The bottom end of the rotor core 300 extends downwards, passing through the pump housing 100 and the lower bearing base 601, forming a flange 3011 at the end. A cylindrical transmission cylinder 700 is coaxially fixed to this flange 3011 by bolts, thus rotating synchronously with the rotor core 300. The bottom end of the transmission cylinder 700 is rotatably supported in a mounting ring 800 at the bottom by a bearing. The mounting ring 800 itself is rotatably connected to the bottom cover 103 by another bearing, allowing the mounting ring 800 to rotate independently. The bottom cover 103 rotates freely but remains coaxial with the transmission cylinder 700. A mounting ear 801 is provided on the inner side of the mounting ring 800, which is used to install various functional cutters 900 by fasteners (such as bolts). Each cutter 900 includes a cutter holder 901 and a cutter body 902 fixedly connected to the cutter holder 901. The cutter holder 901 and the mounting ear 801 are fixedly connected by fasteners. The cutter body 902 can be a spiral cutter for stirring and propulsion, a reamer for cutting, or a pulverizer for crushing debris. In this embodiment, it is a spiral cutter. Please see Figures 9-12 Inside the base cover 103, a transmission assembly 1000 is provided between the transmission cylinder 700 and the mounting ring 800. The transmission assembly 1000 is used to realize the power connection or disconnection between the transmission cylinder 700 and the mounting ring 800. Specifically, the transmission assembly 1000 includes an upper gear ring 1001, a lower gear ring 1002, a first gear 1003, a second gear 1004, and an electromagnet 1005. An upper gear ring 1001 is fixedly sleeved on the outer wall of the transmission cylinder 700, and the outer wall of the mounting ring 800 is... A lower gear ring 1002 is fixedly sleeved inside the bottom cover 103. One side of the lower gear ring 1002 is rotatably supported by a first gear 1003 via a vertical first drive shaft 1006. The first gear 1003 meshes with the lower gear ring 1002. One side of the upper gear ring 1001 is rotatably supported by a second gear 1004 via a vertical second drive shaft 1007. The second gear 1004 meshes with the upper gear ring 1001. The first drive shaft 1006 and the second drive shaft 1007 are designed to be coaxially opposed. Furthermore, a first spline portion 1008 is machined at the top end of the first drive shaft 1006, and a second spline portion 1009 is machined at the bottom end of the second drive shaft 1007. A spline sleeve 1017 with an internal spline hole is slidably splinedly connected to both the first spline portion 1008 and the second spline portion 1009. A spring 1010 is fitted between the second gear 1004 and the spline sleeve 1017, with one end of the spring 1010 fixedly connected to the second gear 1004 and the other end fixedly connected to the spline sleeve 1017. Under normal conditions, the spring force of spring 1010 pushes spline sleeve 1017 to slide downward, so that its spline hole is simultaneously engaged with the first spline part 1008 and the second spline part 1009. At this time, the power transmission path is sequentially: transmission cylinder 700, upper gear ring 1001, second gear 1004, second transmission shaft 1007, transmission sleeve, first transmission shaft 1006, first gear 1003, lower gear ring 1002, and mounting ring 800, thereby realizing the transmission of power from rotor core 300 to cutter 900. To achieve power cut-off, a drive arm 1011 is rotatably connected to the outside of the transmission sleeve. The drive arm 1011 includes a traction part 1012 and an adsorption part 1013 fixedly connected to the traction part 1012. A rotating ring 1014 is fixedly connected to the spline sleeve 1017. The traction part 1012 is provided with a rotating hole. The inner wall of the rotating hole is provided with an annular groove 1015. The spline sleeve 1017 is located in the rotating hole, and the rotating ring 1014 is located in the annular groove 1015. A guide post 1016 is fixedly connected inside the bottom cover 103. The adsorption part 1013 is slidably connected to the guide post 1016. An adsorption platform made of ferromagnetic material is fixedly connected to the adsorption part 1013. An electromagnet 1005 is fixedly installed inside the bottom cover 103 at the position corresponding to the adsorption platform. When the electromagnet 1005 is energized, it generates a magnetic force to attract the adsorption platform to move upward. This causes the drive arm 1011 to overcome the elastic force of the spring 1010 and pull the spline sleeve 1017 upward until its spline hole is completely disengaged from the first spline part 1008. At this time, the power connection between the first drive shaft 1006 and the second drive shaft 1007 is cut off, the first gear 1003 and the lower gear ring 1002 stop rotating, the mounting ring 800 and the cutter 900 remain stationary, and the water pump enters the pure water pumping mode.

[0017] This embodiment discloses an electromagnetic shaftless water pump, which has two specific operating modes: In pure pumping mode, only fluid transportation is required. By controlling the electromagnet 1005 to be energized, the electromagnet 1005 attracts the adsorption platform on the drive arm 1011, which drives the spline sleeve 1017 to move upward and compress the spring 1010, so that the spline hole of the spline sleeve 1017 disengages from the first spline part 1008 of the first drive shaft 1006. At this time, the rotor core 300 rotates under the drive of the rotating magnetic field generated by the stator winding 202, which drives the spiral impeller 400 to work, drawing the fluid from the bottom inlet 104, pressurizing it through the pump channel 304, and discharging it from the top outlet pipe 102. Meanwhile, the mounting ring 800 and the cutter 900 at the bottom remain stationary because the power is cut off, avoiding idling losses. In the combined operation mode, pumping and underwater cutting or crushing are required. By controlling the electromagnet 1005 to be de-energized, the restoring force of the spring 1010 pushes the transmission sleeve to move down, so that its spline hole simultaneously engages with the first spline part 1008 and the second spline part 1009. At this time, the rotational power of the rotor core 300 drives the spiral impeller 400 to pump water on the one hand, and drives the mounting ring 800 and the cutter 900 mounted on it to rotate synchronously on the other hand, thereby realizing the integrated and synchronous operation of pumping and operation.

[0018] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0019] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electromagnetic shaftless water pump, comprising a pump casing (100), a stator core (200), and a rotor core (300), characterized in that: The stator core (200) is fixedly connected inside the pump casing (100). The rotor core (300) is located inside the stator core (200). A pump channel (304) is located in the middle of the rotor core (300). Multiple impellers (400) are fixedly connected to the inner wall of the pump channel (304). An upper bearing assembly (500) is located at the top of the pump casing (100) in conjunction with the rotor core, and a lower bearing assembly (600) is located at the bottom of the pump casing (100) in conjunction with the rotor core. The bottom end of the rotor core (300) extends out of the pump housing (100). A bottom cover (103) is fixedly connected to the bottom of the pump housing (100). An mounting ring (800) is rotatably connected inside the bottom cover (103). The mounting ring (800) is rotatably connected to the bottom of the rotor core (300). The mounting ring (800) and the rotor core (300) are connected or disconnected by a transmission assembly (1000). The mounting ring (800) is used to install a cutting tool (900).

2. The electromagnetic shaftless water pump according to claim 1, characterized in that: The stator core (200) includes a stator body (201) and a stator winding (202) disposed on the stator body (201). The rotor core (300) includes a core body (301) and multiple sets of permanent magnets (302) disposed inside the core body (301).

3. The electromagnetic shaftless water pump according to claim 2, characterized in that: The upper bearing assembly (500) includes a fixed pressure ring (303), a first upper sealed bearing (501), and a second upper sealed bearing (502). The rotating core body (301) is provided with multiple sets of mounting holes, and each set of mounting holes is provided with a permanent magnet (302). The fixed pressure ring (303) is fixedly connected to the rotating core body (301) by bolts and seals the mounting holes. The top of the pump housing (100) is provided with a bearing cavity (106), and the fixed pressure ring (303) is located in the bearing cavity (106). The fixed pressure ring (303) includes an upper sealing part (3031) and a lower sealing part (3032). A first upper sealing bearing (501) is provided between the lower sealing part (3032) and the bearing cavity (106), and a second upper sealing bearing (502) is provided between the upper sealing part (3031) and the bearing cavity (106). The lower bearing assembly (600) includes a lower sealed bearing (602) and a lower bearing base (601). The lower bearing base (601) is fixedly connected to the bottom end of the pump housing (100). The lower sealed bearing (602) is provided on the lower bearing base (601). The lower sealed bearing (602) cooperates with the rotating core body (301).

4. The electromagnetic shaftless water pump according to claim 3, characterized in that: A pump cover (101) is fixedly connected to the top of the pump casing (100), and a water outlet pipe (102) is fixedly connected to the pump cover (101). The bottom cover (103) is provided with a water inlet (104) corresponding to the mounting ring (800), and a water inlet cover (107) is detachably and fixedly connected to the bottom cover (103) corresponding to the water inlet (104).

5. An electromagnetic shaftless water pump according to claim 4, characterized in that: The bottom end of the rotating core body (301) is provided with a flange (3011), and a transmission cylinder (700) is fixedly connected to the flange (3011) by bolts. The transmission cylinder (700) is coaxially arranged with the rotating core body (301), and the bottom end of the transmission cylinder (700) is rotatably connected to the mounting ring (800). The transmission cylinder (700) and the mounting ring (800) are coaxially arranged. The transmission cylinder (700) and the mounting ring (800) are poweredly connected through the transmission assembly (1000).

6. An electromagnetic shaftless water pump according to claim 5, characterized in that: The transmission assembly (1000) includes an upper gear ring (1001), a lower gear ring (1002), a first gear (1003), a second gear (1004), and an electromagnet (1005). The upper gear ring (1001) is fixedly connected to the transmission cylinder (700), and the lower gear ring (1002) is fixedly connected to the mounting ring (800). The first gear (1003) is rotatably connected to the lower gear ring (1002) on one side inside the bottom cover (103) via a first transmission shaft (1006). The first gear (1003) meshes with the lower gear ring (1002). The bottom cover (103) is located on one side of the upper gear ring (1001) and is rotatably connected to the second gear (1004) via the second transmission shaft (1007). The second gear (1004) meshes with the upper gear ring (1001). The first transmission shaft (1006) and the second transmission shaft (1007) are coaxially arranged. The first drive shaft (1006) has a first spline portion (1008) at its top, and the second drive shaft (1007) has a second spline portion (1009) at its bottom. A spline sleeve (1017) is provided between the first drive shaft (1006) and the second drive shaft (1007). The spline sleeve (1017) has a spline hole, which is slidably splinedly connected to the first spline portion (1008) and the second spline portion (1009). A spring (1010) is provided between the second gear (1004) and the spline sleeve (1017). One end of the spring (1010) is fixedly connected to the spline sleeve (1017), and the other end is fixedly connected to the second gear (1004). A drive arm (1011) is rotatably connected to the spline sleeve (1017). The drive arm (1011) is slidably connected inside the bottom cover (103). The electromagnet (1005) is fixedly connected inside the bottom cover (103). An adsorption platform is fixedly connected to the drive arm (1011) corresponding to the electromagnet (1005). When the electromagnet (1005) adsorbs the adsorption platform, the spline hole disengages from the first spline part (1008).

7. An electromagnetic shaftless water pump according to claim 6, characterized in that: A rotating ring (1014) is fixedly connected to the spline sleeve (1017). The drive arm (1011) includes a traction part (1012) and an adsorption part (1013) fixedly connected to the traction part (1012). The traction part (1012) is provided with a rotating hole, and an annular groove (1015) is provided on the inner wall of the rotating hole. The spline sleeve (1017) is located in the rotating hole, and the rotating ring (1014) is located in the annular groove (1015). A guide post (1016) is fixedly connected inside the bottom cover (103), the adsorption part (1013) is slidably connected to the guide post (1016), and the adsorption stage is fixedly connected to the adsorption part (1013).

8. An electromagnetic shaftless water pump according to claim 4, characterized in that: The impeller (400) is an integrally spiral impeller, which can be a single spiral or multiple spirals; When the spiral impeller is multi-spiral, the spiral impeller is a constant pitch impeller or a variable pitch impeller; The cross-section of the spiral impeller is rectangular or trapezoidal.

9. An electromagnetic shaftless water pump according to claim 4, characterized in that: The bottom of the bottom cover (103) is provided with a mounting thread groove (105), and the top of the water inlet cover (107) is provided with a threaded part (1071), which is threadedly connected to the mounting thread groove (105). The water inlet cover (107) can be replaced by a water inlet pipe.

10. An electromagnetic shaftless water pump according to claim 4, characterized in that: The mounting ring (800) is fixedly connected to a mounting ear (801), and the cutting tool (900) includes a tool holder (901) and a cutting tool body (902) fixedly connected to the tool holder (901). The tool holder (901) and the mounting ear (801) are fixedly connected by fasteners. The blade body (902) is a spiral blade, a reamer, or a shredder.

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