Super-efficient permanent magnet direct drive pump

By introducing spherical guide chambers, concave rings, sealing rings and guide plates into the permanent magnet direct-drive pump and combining them with electromagnetic field drive, the problems of insufficient head, low flow and low efficiency of the permanent magnet pump are solved, achieving efficient fluid transportation and stable operation of the pump.

CN223424251UActive Publication Date: 2025-10-10ZHEJIANG YIMAIDA PUMP CO LTD
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Patent Information

Application Number
CN202422675142.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-04
Publication Date
2025-10-10
Estimated Expiration
2034-11-04

AI Technical Summary

Technical Problem

Existing permanent magnet pumps have problems with insufficient head, low flow and low efficiency when processing fluids. In particular, when the water flow channel is too short, turbulence is severe, resulting in high energy consumption.

Method used

An ultra-high-efficiency permanent magnet direct-drive pump was designed, including a pump body, impeller, magnetic capsule, pump shaft, bearings, drive mechanism and frame. A spherical guide cavity and a step-by-step expanding concave ring were provided in the pump body to reduce liquid retention and turbulence. A sealing ring, shaft frame and guide plate were combined to improve fluid flow stability. The electromagnetic field generated by the excitation winding and permanent magnet rotor drove the magnetic capsule to rotate, enhancing the connection strength and stability.

Benefits of technology

The head, flow rate and efficiency of the permanent magnet direct drive pump are improved, turbulence and disturbance are reduced, the working performance of the pump is improved, and the sealing structure prevents liquid from entering the drive mechanism and damaging the pump body, thereby enhancing safety and stability.

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Abstract

The utility model discloses a super-efficient permanent magnet direct drive pump, which belongs to the technical field of permanent magnet pumps and comprises a pump body, an impeller, a magnetic bag, a pump shaft, a bearing, a driving mechanism and a frame, the pump body comprises a front cover and a rear cover, the outer end of the front cover is connected with the outer end of the driving mechanism through a bolt, one end of the impeller is sleeved in a cavity of the front cover, and the other end of the impeller is fixedly connected with one end of the magnetic bag. The rear cover is cylindrical, the other end of the magnetic bag is sleeved with the rear cover cylinder, the pump shaft penetrates through the impeller and the magnetic bag, the two ends of the pump shaft are inserted into the front cover and the rear cover respectively, the pump shaft is sleeved with the bearing and located between an inner hole of the magnetic bag and the pump shaft, and the outer portion of the rear cover cylinder is installed in a cavity of the driving mechanism. A pump cavity is formed in the inner space of the front cover and the rear cover, a spherical flow guide cavity is formed in one side of the pump cavity, turbulence and disturbance are reduced, the kinetic energy of fluid is improved, and therefore the lift, flow and efficiency of the permanent magnet direct drive pump are improved, and the working performance of the pump is improved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of permanent magnet pumps, and more specifically relates to an ultra-high-efficiency permanent magnet direct-drive pump. Background Art

[0002] A permanent magnet pump is a pump that uses magnetic transmission to drive fluid. Its structural features enable it to perform well when handling corrosive, volatile or high-temperature fluids. A common permanent magnet pump is a pump body driven by magnetic field force. Its structure is composed of three parts: a pump head, a permanent magnet transmission device, and other components such as a motor. The pump head mainly uses a permanent magnet rotor as an internal magnet to connect to the impeller to drive the impeller. The magnetic drive device mainly consists of an external magnet, an isolation sleeve, and a motor. During the rotation of the impeller, a negative pressure is formed in the impeller cavity. Under the action of atmospheric pressure, water is pressed into the impeller cavity. Under the further push of the impeller blades, the water is transported to the destination from the outlet pipe on the pump body. When the water flow channel is too short, the impeller's push on the water will generate excessive turbulence in the impeller cavity. These turbulences cannot be buffered in the impeller cavity, and the energy will be offset by the violent agitation of the turbulence. This will affect the pump head and cause high power consumption of the pump. Therefore, an ultra-efficient permanent magnet direct drive pump is needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an ultra-high efficiency permanent magnet direct drive pump, which can meet the requirements of high head, large flow and high efficiency of the permanent magnet direct drive pump.

[0004] The utility model discloses an ultra-high efficiency permanent magnet direct drive pump, comprising a pump body, an impeller, a magnetic capsule, a pump shaft, a bearing, a drive mechanism and a frame. The pump body comprises a front cover and a rear cover. The outer end of the front cover is connected to the outer end of the drive mechanism by bolts. One end of the impeller is sleeved in the front cover cavity, and the other end is fixedly connected to one end of the magnetic capsule. The rear cover is set in a cylindrical shape, and the other end of the magnetic capsule is sleeved inside the rear cover cylinder. The pump shaft passes through the impeller and the magnetic capsule, and the two ends of the pump shaft are respectively inserted into the front cover and the rear cover. The bearing sleeve is arranged outside the pump shaft and is located between the inner hole of the magnetic capsule and the pump shaft. The main body is installed in the driving mechanism cavity, the frame is fixedly connected to the lower end of the driving mechanism, the internal space of the front cover and the rear cover forms a pump cavity, and a liquid inlet and a liquid outlet are provided on the outside of the pump body. The liquid inlet is located in the central area of ​​the front cover, and the liquid outlet is located above the front cover. A spherical guide cavity is provided on the side of the pump cavity away from the liquid outlet to reduce liquid retention when the liquid enters the pump cavity, make the flow of the fluid in the pump cavity more stable, reduce turbulence and disturbance, and increase the kinetic energy of the fluid, thereby improving the head, flow rate and efficiency of the permanent magnet direct drive pump and improving the working performance of the pump.

[0005] As a further improvement of the utility model, the magnetic capsule is integrated with several permanent magnet rotors, the permanent magnet rotors generate fixed magnetic field when rotating, the driving mechanism comprises excitation winding, the several permanent magnet rotors and the excitation winding are uniformly distributed around the axis of the pump shaft, the electromagnetic field generated after the excitation winding is electrified corresponds to the magnetic field generated by the several permanent magnet rotors, the excitation winding generates electromagnetic field, the electromagnetic field interacts with the permanent magnet rotors in the magnetic capsule, thereby driving the magnetic capsule to rotate, the excitation winding is a silicon steel sheet enameled wire winding, the outer side of the excitation winding is coated with a sealed insulation layer, the inside and outside of the excitation winding are filled with epoxy resin glue, preventing the excitation winding from being damaged after liquid leakage and improving safety.

[0006] As a further improvement of the utility model, the driving mechanism further comprises a sealing ring, one end of the rear cover connected with the front cover is provided with a convex edge, and one sealing ring is sleeved on the convex edge; a sealing step is arranged on one end of the driving mechanism close to the excitation winding, and the sealing ring is sleeved on the sealing step, preventing liquid in the permanent magnet direct drive pump from flowing into the driving mechanism and causing damage to the pump body.

[0007] As a further improvement of the utility model, the front cover further comprises a shaft support, one end of the shaft support is fixedly connected with the liquid inlet, and the other end is provided with a slot matched with the pump shaft; the bottom of the rear cover cylinder is provided with a slot matched with the pump shaft, and the two ends of the pump shaft are inserted into the slots of the shaft support and the rear cover respectively, thereby enhancing the connection strength of the pump shaft and the front cover and the rear cover.

[0008] As a further improvement of the utility model, the inner cavity of the front cover is provided with several concave rings expanding step by step, the flow-through space of the inner cavity of the front cover is increased, and the lift, flow rate and efficiency of the permanent magnet direct drive pump are improved; three flow guide plates are arranged on the shaft support and protrude outward, the flow guide plates are connected with the inner wall of the liquid inlet and are symmetrically distributed with the shaft support slot as the center, the flow-through space of the liquid inlet is increased while the connection strength is ensured, and the lift, flow rate and efficiency of the permanent magnet direct drive pump are improved.

[0009] As a further improvement of the utility model, the driving mechanism further comprises a thrust ring, the thrust ring comprises a front thrust ring and a rear thrust ring, the impeller is provided with an interface ring, the front thrust ring is coupled and linked with the interface ring, the front thrust ring is installed on one concave ring close to the liquid inlet in the inner cavity of the front cover, the axial force resistance of the impeller is increased, the wear of the impeller and the front thrust ring is protected, the position of the impeller in the pump body is maintained, the precision of the excitation winding and the magnetic capsule is controlled to form a complete electromagnetic field, the rear thrust ring is sleeved on the pump shaft and located at the connection between the magnetic capsule and the rear cover, and the stability of the permanent magnet direct drive pump is improved.

[0010] Compared with the existing technology, the beneficial effects of the present invention are: a spherical guide cavity is provided under the pump cavity to reduce liquid retention when the liquid enters the pump cavity, so that the flow of the fluid in the pump cavity is smoother, turbulence and disturbance are reduced, and the kinetic energy of the fluid is increased, thereby improving the head, flow rate and efficiency of the permanent magnet direct drive pump and improving the working performance of the pump; a sealing ring is provided on the convex edge and the sealing step to prevent the liquid in the permanent magnet direct drive pump from flowing into the drive mechanism and causing damage to the pump body; a shaft frame and a guide plate on the shaft frame are provided to ensure the connection strength while increasing the flow space of the liquid inlet, thereby improving the head, flow rate and efficiency of the permanent magnet direct drive pump; a thrust ring is provided to protect the wear of the impeller and the front thrust ring, maintain the position of the impeller in the pump body, and control the vertical and horizontal accuracy of the excitation winding and the magnetic capsule to form a complete electromagnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a half-section schematic diagram of the pump body structure of the present utility model;

[0012] Figure 2 It is a structural diagram of the utility model;

[0013] Figure 3 This is a schematic diagram of the explosion of the pump body of the utility model;

[0014] Figure 4 This is a schematic diagram of the front cover structure of the utility model;

[0015] Figure 5 This is a front cross-sectional view of the pump body structure of the present utility model;

[0016] Figure 6 This is a schematic diagram of the connection structure between the impeller and the pump shaft of the utility model;

[0017] Figure 7 This is a formal cross-sectional view of the drive mechanism of the present utility model.

[0018] Description of the numbers in the figure:

[0019] Pump body 1; front cover 11; shaft frame 111; guide plate 112; concave ring 113; convex edge 114; rear cover 12; pump chamber 13; spherical guide chamber 131; liquid inlet 14; liquid outlet 15; impeller 2; interface ring 21; magnetic capsule 3; pump shaft 4; bearing 5; drive mechanism 6; excitation winding 61; sealing step 62; frame 7; thrust ring 8; front thrust ring 81; rear thrust ring 82; sealing ring 9. DETAILED DESCRIPTION

[0020] Specific embodiment 1: Please refer to Figure 1-Figure 7The utility model relates to an ultra-high-efficiency permanent magnet direct-drive pump, comprising a pump body 1, an impeller 2, a magnetic capsule 3, a pump shaft 4, a bearing 5, a drive mechanism 6 and a frame 7. The pump body 1 comprises a front cover 11 and a rear cover 12. The outer end of the front cover 11 is connected to the outer end of the drive mechanism 6 by bolts. One end of the impeller 2 is sleeved in the cavity of the front cover 11, and the other end is fixedly connected to one end of the magnetic capsule 3. The rear cover 12 is designed to be cylindrical, and the other end of the magnetic capsule 3 is sleeved inside the rear cover 12. The pump shaft 4 passes through the impeller 2 and the magnetic capsule 3, and the two ends of the pump shaft 4 are respectively inserted into the front cover 11 and the rear cover 12. The bearing 5 is sleeved outside the pump shaft 4 and is located between the inner hole of the magnetic capsule 3 and the pump shaft 4. The outside of the rear cover 12 is installed in the cavity of the driving mechanism 6, and the frame 7 is fixedly connected to the lower end of the driving mechanism 6. The internal space of the front cover 11 and the rear cover 12 forms a pump cavity 13. The outside of the pump body 1 is provided with a liquid inlet 14 and a liquid outlet 15. The liquid inlet 14 is provided in the central area of ​​the front cover 11, and the liquid outlet 15 is provided above the front cover 11. A spherical guide cavity 131 is provided on the side of the pump cavity 13 away from the liquid outlet 15 to reduce liquid retention when the liquid enters the pump cavity, make the flow of the fluid in the pump cavity more stable, reduce turbulence and disturbance, and increase the kinetic energy of the fluid, thereby improving the head, flow rate and efficiency of the permanent magnet direct drive pump and improving the working performance of the pump.

[0021] In a further embodiment, Figure 6-Figure 7 As shown, a plurality of permanent magnet rotors are integrated on the magnetic capsule 3. When rotating, the permanent magnet rotors generate a fixed magnetic field. The driving mechanism 6 includes an excitation winding 61. The plurality of permanent magnet rotors 41 and the excitation winding 61 are evenly distributed around the axis of the pump shaft 4. The electromagnetic field generated by the excitation winding 61 after being energized corresponds to the magnetic field generated by the plurality of permanent magnet rotors 41. The excitation winding 61 generates an electromagnetic field, which interacts with the permanent magnet rotor 41 in the magnetic capsule 3, thereby driving the magnetic capsule 3 to rotate. The excitation winding 61 is a silicon steel sheet enameled wire winding. The outside of the excitation winding 61 is covered with a sealed insulating layer. The inside and outside of the excitation winding 61 are filled with epoxy resin glue to prevent damage to the excitation winding 61 after leakage, thereby improving safety.

[0022] In a further embodiment, Figure 5 and Figure 7 As shown, it also includes a sealing ring 9, and a convex edge 114 is provided at one end where the rear cover 12 is connected to the front cover 11, and a sealing ring 9 is sleeved on the convex edge 114; a sealing step 62 is provided on one end of the driving mechanism 6 close to the excitation winding 61, and the sealing ring 9 is sleeved on the sealing step 62 to prevent the liquid in the permanent magnet direct drive pump from flowing into the driving mechanism 6 and causing damage to the pump body.

[0023] In a further embodiment, Figure 4-Figure 5As shown, the front cover 11 also includes a shaft bracket 111, one end of which is fixedly connected with the liquid inlet 14, and the other end is provided with a slot matched with the pump shaft 4. The bottom of the barrel of the rear cover 12 is provided with a slot matched with the pump shaft 4. The two ends of the pump shaft 4 are respectively inserted into the slots of the shaft bracket 111 and the rear cover 12, thereby enhancing the connection strength of the pump shaft 4 with the front cover 11 and the rear cover 12.

[0024] In further embodiments, as shown in Figure 4 The inner cavity of the front cover 11 is provided with a plurality of recessed rings 113 which are gradually expanded, thereby increasing the flow space in the inner cavity of the front cover 11 and improving the lift, flow rate and efficiency of the permanent magnet direct drive pump. The shaft bracket 111 is provided with three extended flow guides 112 which are connected with the inner wall of the liquid inlet 14 and symmetrically distributed about the shaft bracket 111 slot, thereby ensuring the connection strength and increasing the flow space of the liquid inlet 14 and improving the lift, flow rate and efficiency of the permanent magnet direct drive pump.

[0025] In further embodiments, as shown in Figure 6 The front cover 11 is also provided with a thrust ring 8 which includes a front thrust ring 81 and a rear thrust ring 82. The front end of the impeller 2 is provided with an interface ring 21. The front thrust ring 81 is coupled to the interface ring 21. The front thrust ring 81 is installed in the inner cavity of the front cover 11 and located on one of the recessed rings 113 close to the liquid inlet 14, thereby increasing the axial force resistance of the impeller 2, protecting the impeller 2 and the front thrust ring 81 from wear, maintaining the position of the impeller 2 in the pump body, and controlling the precision of the verticality of the excitation winding 61 and the magnetic capsule 3 to form a complete electromagnetic field. The rear thrust ring 82 is sleeved on the pump shaft 4 and located at the connection between the magnetic capsule 3 and the rear cover 12, thereby improving the stability of the permanent magnet direct drive pump.

[0026] When started, the external power supply is powered on through the driving mechanism 6. The excitation winding 61 generates an electromagnetic field which interacts with the permanent magnet rotor on the magnetic capsule 3, thereby driving the permanent magnet rotor in the magnetic capsule 3 to rotate. The permanent magnet rotor directly drives the impeller 2 to rotate along the central axis of the bearing 5. The impeller 2 discharges the air in the front cover 11 from the liquid outlet 15. The atmospheric pressure in the front cover 11 is lower than the atmospheric pressure outside. A pressure difference is formed between the inside and outside of the front cover 11. The liquid flows into the pump cavity 13 from the liquid inlet 14 and then flows to the liquid outlet 15 through the ball-shaped flow guide cavity 131.

Claims

1. An ultra-high efficiency permanent magnet direct drive pump, characterized by: The pump body (1) comprises a pump body (1), an impeller (2), a magnetic capsule (3), a pump shaft (4), a bearing (5), a driving mechanism (6) and a frame (7). The pump body (1) comprises a front cover (11) and a rear cover (12). The outer end of the front cover (11) is connected to the outer end of the driving mechanism (6) by bolts. One end of the impeller (2) is fitted into the cavity of the front cover (11), and the other end is fixedly connected to one end of the magnetic capsule (3). The rear cover (12) is set to be cylindrical. The other end of the magnetic capsule (3) is fitted into the interior of the rear cover (12) cylinder. The pump shaft (4) passes through the impeller (2) and the magnetic capsule (3), and the two ends of the pump shaft (4) are respectively inserted into the front cover (11) and the rear cover (1 2) inside, the bearing (5) is sleeved on the outside of the pump shaft (4) and is located between the inner hole of the magnetic capsule (3) and the pump shaft (4), the outer side of the rear cover (12) is installed in the cavity of the driving mechanism (6), the frame (7) is fixedly connected to the lower end of the driving mechanism (6), the internal space of the front cover (11) and the rear cover (12) forms a pump cavity (13), the outer side of the pump body (1) is provided with a liquid inlet (14) and a liquid outlet (15), the liquid inlet (14) is provided in the central area of ​​the front cover (11), the liquid outlet (15) is provided above the front cover (11), and a spherical guide cavity (131) is provided on the side of the pump cavity (13) away from the liquid outlet (15).

2. The ultra-high efficiency permanent magnet direct drive pump according to claim 1, characterized in that: The front cover (11) further includes a shaft frame (111), one end of the shaft frame (111) is fixedly connected to the liquid inlet (14), and the other end is provided with a slot matching the pump shaft (4), and the bottom of the rear cover (12) is provided with a slot matching the pump shaft (4), and the two ends of the pump shaft (4) are respectively inserted into the slots of the shaft frame (111) and the rear cover (12).

3. The ultra-high efficiency permanent magnet direct drive pump according to claim 2, characterized in that: The inner cavity of the front cover (11) is provided with a plurality of concave rings (113) that expand step by step. The shaft frame (111) is provided with three protruding guide plates (112). The guide plates (112) are connected to the inner wall of the liquid inlet (14) and are symmetrically distributed with the shaft frame (111) slot as the center.

4. The ultra-high efficiency permanent magnet direct drive pump according to claim 1, characterized in that: A plurality of permanent magnet rotors are integrated on the magnetic capsule (3). When the permanent magnet rotors rotate, the permanent magnet rotors generate a fixed magnetic field. The driving mechanism (6) includes an excitation winding (61). The plurality of permanent magnet rotors and the excitation winding (61) are evenly distributed around the axis of the pump shaft (4). When the excitation winding (61) is energized, the electromagnetic field generated corresponds to the magnetic field generated by the plurality of permanent magnet rotors. The excitation winding (61) generates an electromagnetic field, and the electromagnetic field interacts with the permanent magnet rotor in the magnetic capsule (3), thereby driving the magnetic capsule (3) to rotate.

5. The ultra-high efficiency permanent magnet direct drive pump according to claim 1, characterized in that: The invention also includes a thrust ring (8), the thrust ring (8) including a front thrust ring (81) and a rear thrust ring (82), an interface ring (21) is provided at the front end of the impeller (2), the front thrust ring (81) and the interface ring (21) are coupled and linked, the front thrust ring (81) is installed on a concave ring (113) near the liquid inlet (14) in the inner cavity of the front cover (11), and the rear thrust ring (82) is sleeved on the pump shaft (4) and is located at the connection between the magnetic capsule (3) and the rear cover (12).

6. The ultra-high efficiency permanent magnet direct drive pump according to claim 1, characterized in that: The drive mechanism (6) further comprises a sealing ring (9), a convex edge (114) is provided at one end where the rear cover (12) is connected to the front cover (11), and a sealing ring (9) is sleeved on the convex edge (114); a sealing step (62) is provided at one end of the interior of the drive mechanism (6) near the excitation winding (61), and the sealing ring (9) is sleeved on the sealing step (62).