High-power variable-frequency shield pump

Abstract

The utility model relates to a high-power variable-frequency shield pump, which solves the problems in the prior art that a controller has many and complicated disassembly and assembly processes, a shielding sleeve is easy to generate eddy current and the like, and adopts the technical scheme that the high-power variable-frequency shield pump comprises a controller, a pump main body and a motor main body for driving the pump main body to work, the motor is characterized in that the controller is arranged at the outer end of the motor shell, an end cover is arranged between the outer end of the motor shell and the controller, a first direct-insertion connector is arranged on the end cover, a second direct-insertion connector is arranged at the bottom of the controller, and the first direct-insertion connector is matched with the second direct-insertion connector in an insertion mode, so that the motor and the controller are in electric signal connection. The motor has the advantages that the end cover is additionally arranged, and the first direct-insertion connector arranged on the end cover is matched with the second direct-insertion connector arranged on the controller in an insertion mode, so that the motor and the controller are easy to disassemble and assemble and convenient to operate, the work intensity of assembly and maintenance is reduced, and accidental damage in the disassembly and assembly process can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of water pumps, and in particular to a high-power variable frequency shielded pump. Background Technology

[0002] With the widespread application of canned motor pumps, the industry is gradually expanding from small-power canned motor pumps for household use to large-power canned motor pumps for commercial use, such as high-power circulating canned motor pumps used in the HVAC industry and high-power cooling canned motor pumps used in data centers.

[0003] High-power canned motor pumps (often high-power variable frequency canned motor pumps) used in the HVAC industry and data centers require long-term continuous operation, and have high power and large load. Therefore, high-power canned motor pumps have high requirements for pressure resistance, noise and efficiency, and also have high requirements for the overall size of the pumps.

[0004] The motors and controllers on current high-power canned motor pumps are quite large. Furthermore, the pre-installed wiring terminals on the motor housing are designed to connect to the control board in the controller, which presents a significant wiring challenge. Moreover, when maintaining a high-power canned motor pump, the connection between the pre-installed wiring terminals and the control board must first be disconnected before the controller can be removed for maintenance. In some cases, the control board may need to be removed first, and then the entire controller may need to be removed from the motor housing before maintenance can be performed on the controller and control board. This process involves numerous and complex disassembly and assembly steps.

[0005] In addition, most high-power canned motor pumps currently use stainless steel shielding sleeves. The stainless steel shielding sleeves between the motor rotor and stator are prone to generating eddy currents, which leads to a decrease in motor performance and a reduction in the efficiency of the canned motor pump. Summary of the Invention

[0006] The purpose of this utility model is to solve the above-mentioned problems existing in the prior art and provide a high-power variable frequency shielded pump. An end cover is added to the outer end of the motor housing, a first straight plug connector is set on the end cover, and a second straight plug connector is set on the controller. The first and second straight plug connectors are connected and cooperated, which makes the disassembly and assembly of the motor and the controller simple and convenient, which helps to reduce the intensity of assembly and maintenance work, and also helps to protect the controller and avoid accidental damage during disassembly and assembly.

[0007] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a high-power variable frequency shielded pump, comprising a controller, a pump body, and a motor body that drives the pump body. The motor body includes a motor housing. The controller is located at the outer end of the motor housing, and an end cover is provided between the outer end of the motor housing and the controller. The end cover has a first straight-through connector, and the bottom of the controller has a second straight-through connector. The first and second straight-through connectors are plugged in to form an electrical signal connection between the motor and the controller. The difference between this technical solution and the prior art is that an end cover is added to the outer end of the motor housing, a first straight-through connector is provided on the end cover, and a second straight-through connector is provided on the controller. In this technical solution, the plugging in of the first and second straight-through connectors simplifies the assembly and disassembly of the motor and controller, making operation convenient and reducing the workload of assembly and maintenance. Furthermore, it prevents accidental damage during assembly and disassembly, protecting the controller (especially the circuit control board), and further reducing assembly and maintenance costs.

[0008] As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures:

[0009] Preferably, the motor body includes a stator assembly and a rotor assembly disposed within the inner cavity of the motor housing, and a shielding sleeve with an open outer end disposed between the stator assembly and the rotor assembly, with an end cap closing the outer end of the shielding sleeve. Using an open-end shielding sleeve, compared to a closed-end shielding sleeve, helps reduce the amount of raw materials consumed. The combination of the shielding sleeve and the end cap effectively confines water in the canned pump within the pump body and motor body, ensuring the pump's operating efficiency. Furthermore, it allows for the placement of a first straight-through connector on the end cap, facilitating connection between the motor body and the controller, and simplifying assembly and maintenance. This improves worker efficiency and reduces labor intensity.

[0010] Preferably, the end cover is a heat dissipation end cover, which is inserted into the outer end of the shielding sleeve, and a sealing ring is provided at the insertion point between the end cover and the shielding sleeve. The end cover is preferably a heat dissipation end cover, which can be made of a good thermal conductor or plastic. Regardless of the material, since the inner wall of the end cover can directly contact the water flow in the motor body, the water flow carries away the heat from the end cover, thereby achieving a heat dissipation effect. This is beneficial for cooling the controller and improves the stability and service life of the controller.

[0011] Preferably, the shielding sleeve is a plastic shielding sleeve, and a pressure-resistant cylinder is fitted onto the shielding sleeve. The pressure-resistant cylinder is located outside the stator assembly and mates with one or both ends of the stator assembly. Using a plastic shielding sleeve reduces or even prevents the generation of eddies in the water flow within the motor body, thereby reducing water flow capacity loss, ensuring the working performance of the canned pump, and providing reliable energy efficiency.

[0012] Preferably, the outer wall of the pressure-resistant cylinder is provided with a reinforcing convex ring. Each pressure-resistant cylinder may be provided with at least one reinforcing convex ring. The provision of the reinforcing convex ring is beneficial to improving the pressure resistance of the pressure-resistant cylinder and to preventing the pressure-resistant cylinder from expanding, cracking, or bursting.

[0013] Preferably, the pressure-resistant cylinder and the reinforcing ring are an integral structure, both made of plastic. This facilitates production, processing, and assembly, reduces the number of parts, and further reduces the occurrence of eddies in the water flow within the motor body.

[0014] Preferably, the controller includes a control box and a circuit control board disposed within the control box. The bottom of the control box has a connection port through which a first or second plug-in connector passes, allowing the first and second plug-in connectors to engage. The control box has a fixed connection portion, which the circuit control board avoids. The fixed connection portion is used to fix the control box to the motor housing via a connector. Alternatively, the second plug-in connector can be directly disposed at the bottom of the control box (i.e., the side facing the end cover, or the inner end), with the inner end of the second plug-in connector connecting to its outer end, and the circuit control board connecting to the outer end of the second plug-in connector. The preferred embodiment is that the bottom of the control box has a connection port through which either the first or second plug-in connector passes. This arrangement improves connection reliability, facilitates disassembly of the circuit control board, and simplifies the structure. The circuit control board avoiding the fixed connection portion allows the entire controller to be removed from the motor body without disassembling the circuit control board, facilitating inspection and maintenance of the controller in a disassembled state.

[0015] Preferably, the stator assembly includes a yoke, teeth located inside the yoke, and coils disposed within the teeth. Grooves are formed between adjacent teeth, and pressure-resistant supports are provided within these grooves. The outer end of the pressure-resistant support engages with the yoke, and the inner end engages with the outer wall of the shielding sleeve, thereby enhancing the pressure resistance of the shielding sleeve. The outer end of the pressure-resistant support can rest against the inner wall of the yoke or be fixed to the yoke using connectors, adhesive bonding, welding, or other methods. The circumferential dimension of the inner end of the pressure-resistant support matches the circumferential dimension of the tooth groove. With the cooperation of the pressure-resistant supports, the two ends of the shielding sleeve are enhanced with pressure-resistant cylinders, and the middle section is further enhanced with pressure-resistant supports, ensuring that the shielding sleeve as a whole possesses sufficient pressure resistance.

[0016] Preferably, the length of the pressure-resistant bracket is adapted to the length of the teeth, and the inner surface of the inner end of the pressure-resistant bracket is adapted to the shape of the outer wall of the shielding sleeve. Preferably, the inner surface of the inner end of the pressure-resistant bracket and the inner surface of the teeth are both attached to the outer wall of the shielding sleeve, which helps to improve the pressure resistance of the shielding sleeve.

[0017] Preferably, the inner surface of the inner end of the pressure-resistant bracket and the inner surface of the tooth are both located on the same cylindrical surface. Typically, pressure-resistant brackets are made of plastic. When the pressure-resistant bracket presses against the outer wall of the pressure-resistant cylinder, it can undergo a certain degree of elastic deformation. Therefore, relatively speaking, the "same cylindrical surface" here does not refer to a strictly precise same cylindrical surface, but rather to roughly the same cylindrical surface.

[0018] The beneficial effects of this utility model are as follows: 1. An end cover is added to the outer end of the motor housing, with a first straight-through connector on the end cover and a second straight-through connector on the controller. The connection between the first and second straight-through connectors simplifies the assembly and disassembly of the motor and controller, making operation convenient and reducing the workload of assembly and maintenance. It also protects the controller from accidental damage during assembly and disassembly. 2. The shielding sleeve is made of plastic, reducing or even preventing the formation of eddies in the water flow within the motor body. This reduces water flow capacity loss and ensures the reliable performance and energy efficiency of the shielded pump. 3. To enhance the pressure resistance of the shielding sleeve, a pressure-resistant cylinder is fitted onto it. To ensure the strength of the pressure-resistant cylinder, a reinforcing convex ring is added. This reinforcing ring improves the pressure resistance of the cylinder and prevents it from bursting or rupturing. 4. To further improve the pressure resistance of the shielding sleeve, a pressure-resistant bracket is installed in the toothed groove of the stator assembly. The outer end of the pressure-resistant bracket abuts against the yoke, and the inner end rests against the outer wall of the shielding sleeve. This allows the two ends of the shielding sleeve to be enhanced with pressure resistance through the pressure-resistant cylinders, and the middle part to be enhanced with pressure resistance through the pressure-resistant bracket, ensuring that the shielding sleeve as a whole has sufficient pressure resistance. 5. The circuit control board avoids the fixed connection part on the control box, ensuring not only convenient direct disassembly of the circuit control board but also convenient disassembly of the control box without removing the circuit control board, further facilitating the operation of the control box for testing and maintenance. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural schematic diagram of this utility model.

[0020] Figure 2 This is an exploded structural diagram of the motor body and controller involved in this utility model.

[0021] Figure 3 This is a schematic diagram of a shielding sleeve involved in this utility model.

[0022] Figure 4 This is a structural schematic diagram of a pressure-resistant cylinder involved in this utility model.

[0023] Figure 5 This is a schematic diagram of a stator assembly involved in this utility model.

[0024] In the diagram: 1. Controller; 2. Pump body; 3. Motor body; 4. End cover; 5. First straight connector; 6. Stator assembly; 7. Shielding sleeve; 8. Sealing ring; 9. Pressure-resistant cylinder; 10. Reinforcing convex ring; 11. Control box; 12. Circuit control board; 13. Connection port; 14. Yoke; 15. Gear; 16. Coil; 17. Gear groove; 18. Pressure-resistant bracket; 19. Rotor assembly; 20. Motor housing. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0026] Example: Figures 1-5 As shown, a high-power variable frequency shielded pump includes a controller 1, a pump body 2, and a motor body 3 that drives the pump body 2 to work. The motor body 3 includes a motor housing 20.

[0027] The main difference between this technical solution and the prior art is that: the controller 1 is located at the outer end of the motor housing 20, and an end cover 4 is provided between the outer end of the motor housing 20 and the controller 1. The end cover 4 is provided with a first straight plug 5, and the bottom of the controller 1 is provided with a second straight plug 5. The first straight plug 5 and the second straight plug 5 are plugged in and cooperate to form an electrical signal connection between the motor and the controller 1.

[0028] In this technical solution, an end cover 4 is added to the outer end of the motor housing 20, a first direct-connector 5 is provided on the end cover 4, and a second direct-connector is provided on the controller 1. In this technical solution, the connection between the first direct-connector 5 and the second direct-connector makes the disassembly and assembly of the motor and the controller 1 simple and convenient, which helps to reduce the workload of assembly and maintenance. Moreover, it can prevent accidental damage during disassembly and assembly, which helps to protect the controller 1 (especially the circuit control board 12), and thus also helps to further reduce assembly and maintenance costs.

[0029] Next, the above technical solution will be explained in detail:

[0030] In practical applications, the motor body 3 includes a stator assembly 6 and a rotor assembly 19 disposed in the inner cavity of the motor housing 20, a shielding sleeve 7 with an open outer end disposed between the stator assembly 6 and the rotor assembly 19, and an end cap 4 that closes the outer end of the shielding sleeve 7.

[0031] In this technical solution, an open-ended shielding sleeve 7 is used. Compared with a closed-ended shielding sleeve 7, this reduces the amount of raw materials consumed by the shielding sleeve 7. The shielding sleeve 7 and the end cover 4 work together to shield the water in the shielded pump inside the pump body 2 and the motor body 3, ensuring the working efficiency of the shielded pump. It also allows for the installation of a first straight-through connector 5 on the end cover 4, facilitating the connection between the motor body 3 and the controller 1, and making assembly, maintenance, and other work easier. This not only improves the work efficiency of the staff but also reduces their labor intensity.

[0032] In practical applications, the end cover 4 is a heat dissipation end cover 4. The end cover 4 is inserted into the outer end of the shielding sleeve 7, and a sealing ring 8 is provided at the insertion part between the end cover 4 and the shielding sleeve 7.

[0033] In this technical solution, the end cover 4 is preferably a heat dissipation end cover 4. The end cover 4 can be made of a material that is a good conductor of heat or plastic. Regardless of the material, since the inner wall of the end cover 4 can directly contact the water flow in the motor body 3, the heat on the end cover 4 is carried away by the flow of water, thereby achieving a heat dissipation effect. This is beneficial for heat dissipation of the controller 1 and for improving the stability and service life of the controller 1.

[0034] In practical applications, the shielding sleeve 7 is a plastic shielding sleeve 7, and a pressure-resistant cylinder 9 is fitted on the shielding sleeve 7. The pressure-resistant cylinder 9 is located outside the stator assembly 6 and cooperates with one or both ends of the stator assembly 6.

[0035] In this embodiment, pressure-resistant cylinders 9 are preferably provided at both ends of the shielding sleeve 7.

[0036] In this technical solution, a plastic shielding sleeve 7 is used to reduce or even prevent the occurrence of eddies in the water flow inside the motor body 3, thereby reducing water flow capacity loss, ensuring the working performance of the shielded pump, and providing reliable energy efficiency.

[0037] In practical applications, the outer wall of the pressure-resistant cylinder 9 is provided with a reinforcing convex ring 10. Each pressure-resistant cylinder 9 may be provided with at least one reinforcing convex ring 10. The provision of the reinforcing convex ring 10 is beneficial to improving the pressure resistance of the pressure-resistant cylinder 9.

[0038] In practical applications, the pressure-resistant cylinder 9 and the reinforcing ring 10 are an integral structure, both made of plastic. This facilitates production, processing, and assembly, reduces the number of parts, and further reduces the occurrence of eddies in the water flow within the motor body 3.

[0039] In this embodiment, it is preferable that each pressure-resistant cylinder 9 is provided with two or more reinforcing convex rings 10.

[0040] In practical applications, the controller 1 includes a control box 11 and a circuit control board 12 disposed inside the control box 11. The bottom of the control box 11 has a connection port 13. The first straight connector 5 or the second straight connector passes through the connection port 13, so that the first straight connector 5 and the second straight connector are plugged in and engaged. The control box 11 has a fixed connection part, and the circuit control board 12 avoids the fixed connection part. The fixed connection part is used to fix the control box 11 to the motor housing 20 through a connector.

[0041] In this technical solution, alternatively, a second plug-in connector can be directly installed at the bottom of the control box 11 (i.e., the side facing the end cover 4, or the inner end). The inner end of the second plug-in connector is connected to the outer end of the second plug-in connector, and the circuit control board 12 is connected to the outer end of the second plug-in connector. A preferred solution is that the bottom of the control box 11 has a connection port 13, through which either the first plug-in connector 5 or the second plug-in connector passes. This arrangement improves connection reliability, facilitates the disassembly of the circuit control board 12, and simplifies the structure. The circuit control board 12 avoids the fixed connection portion, allowing the entire controller 1 to be directly removed from the motor body 3 without disassembling the circuit control board 12, facilitating inspection and maintenance of the controller 1 in a disassembled state.

[0042] In practical applications, the stator assembly 6 includes a yoke 14, teeth 15 located inside the yoke 14, and coils 16 disposed in the teeth 15. There are tooth grooves 17 between adjacent teeth 15. A pressure-resistant bracket 18 is provided in the tooth groove 17. The outer end of the pressure-resistant bracket 18 cooperates with the yoke 14, and the inner end of the pressure-resistant bracket 18 cooperates with the outer wall of the shielding sleeve 7 to enhance the pressure resistance of the shielding sleeve 7.

[0043] In this technical solution, with the cooperation of the pressure-resistant bracket 18, the two ends of the shielding sleeve 7 are enhanced with pressure resistance by the pressure-resistant cylinder 9, and the middle part is enhanced with pressure resistance by the pressure-resistant bracket 18, so that the shielding sleeve 7 as a whole has sufficient pressure resistance.

[0044] In this technical solution, the outer end of the pressure-resistant bracket 18 can rest against the inner wall of the yoke 14, or it can be fixed to the yoke 14 by means of connectors, adhesive bonding, welding, etc. The circumferential dimension of the inner end of the pressure-resistant bracket 18 is adapted to the circumferential dimension of the toothed groove 17.

[0045] In practical applications, the length of the pressure-resistant bracket 18 is adapted to the length of the tooth 15, and the inner surface of the inner end of the pressure-resistant bracket 18 is adapted to the shape of the outer wall of the shielding sleeve 7.

[0046] In this technical solution, preferably, the inner surface of the inner end of the pressure-resistant bracket 18 and the inner surface of the tooth 15 are both attached to the outer wall of the shielding sleeve 7, which helps to improve the pressure resistance of the shielding sleeve 7.

[0047] In practical applications, the inner surface of the inner end of the pressure-resistant bracket 18 and the inner surface of the tooth 15 are both located on the same cylindrical surface.

[0048] In this technical solution, the pressure-resistant bracket 18 is usually made of plastic. When the pressure-resistant bracket 18 presses against the outer wall of the pressure-resistant cylinder 9, it can produce a certain degree of elastic deformation. Therefore, relatively speaking, the same cylindrical surface here is not a very precise same cylindrical surface in the strict sense, but refers to roughly the same cylindrical surface.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations can be made to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-power variable frequency shielded pump, comprising a controller (1), a pump body (2), and a motor body (3) for driving the pump body (2), wherein the motor body (3) includes a motor housing (20), characterized in that... The controller (1) is located at the outer end of the motor housing (20). An end cover (4) is provided between the outer end of the motor housing (20) and the controller (1). The end cover (4) is provided with a first direct connector (5), and the controller (1) is provided with a second direct connector. The first direct connector (5) and the second direct connector are plugged in and cooperated to form an electrical signal connection between the motor and the controller (1).

2. The high-power variable frequency shielded pump according to claim 1, characterized in that... The motor body (3) includes a stator assembly (6) and a rotor assembly (19) disposed in the inner cavity of the motor housing (20), a shielding sleeve (7) with an open outer end disposed between the stator assembly (6) and the rotor assembly (19), and an end cap (4) closing the outer end of the shielding sleeve (7).

3. The high-power variable frequency shielded pump according to claim 2, characterized in that... The end cap (4) is a heat dissipation end cap (4). The end cap (4) is inserted into the outer end of the shielding sleeve (7). A sealing ring (8) is provided at the insertion part between the end cap (4) and the shielding sleeve (7).

4. The high-power variable frequency shielded pump according to claim 2, characterized in that... The shielding sleeve (7) is a plastic shielding sleeve (7), and a pressure-resistant cylinder (9) is fitted on the shielding sleeve (7). The pressure-resistant cylinder (9) is located outside the stator assembly (6) and cooperates with one or both ends of the stator assembly (6).

5. The high-power variable frequency shielded pump according to claim 4, characterized in that... The outer wall of the pressure-resistant cylinder (9) is provided with a reinforcing protrusion ring (10).

6. The high-power variable frequency shielded pump according to claim 5, characterized in that... The pressure-resistant cylinder (9) and the reinforcing convex ring (10) are an integral structure and are both made of plastic.

7. The high-power variable frequency shielded pump according to any one of claims 1-6, characterized in that... The controller (1) includes a control box (11) and a circuit control board (12) disposed inside the control box (11). The bottom of the control box (11) has a connection port (13). A first plug-in connector (5) or a second plug-in connector passes through the connection port (13) to allow the first plug-in connector (5) and the second plug-in connector to be plugged in and engaged. The control box (11) has a fixed connection part. The circuit control board (12) avoids the fixed connection part. The fixed connection part is used to fix the control box (11) to the motor housing (20) by means of a connector.

8. The high-power variable frequency shielded pump according to any one of claims 2-6, characterized in that... The stator assembly (6) includes a yoke (14), teeth (15) located inside the yoke (14), and coils (16) disposed on the teeth (15). There are tooth grooves (17) between adjacent teeth (15). A pressure-resistant bracket (18) is provided in the tooth groove (17). The outer end of the pressure-resistant bracket (18) cooperates with the yoke (14), and the inner end of the pressure-resistant bracket (18) cooperates with the outer wall of the shielding sleeve (7) to enhance the pressure resistance of the shielding sleeve (7).

9. The high-power variable frequency shielded pump according to claim 8, characterized in that... The length of the pressure-resistant bracket (18) is adapted to the length of the tooth (15), and the inner surface of the inner end of the pressure-resistant bracket (18) is adapted to the shape of the outer wall of the shielding sleeve (7).

10. The high-power variable frequency shielded pump according to claim 9, characterized in that... The inner surface of the inner end of the pressure-resistant bracket (18) and the inner surface of the tooth (15) are both located on the same cylindrical surface.

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