Built-in water-cooling energy-multiplying permanent-magnet variable-frequency shielding intelligent circulating pump

Abstract

The invention belongs to the technical field of circulating pumps, and provides a built-in water-cooling energy-doubling permanent magnet frequency conversion shielding intelligent circulating pump, a sealed motor barrel and a frequency converter are mounted at the upper end of a pump body, a main shaft is movably mounted in the middle of the interior of the motor barrel, and an upper end silicon carbide guide sleeve is mounted between the outer side of the upper end of the main shaft and the inner wall of a connector; the lower end of the spindle is fixedly connected with the impeller; a constant pressure pump is installed in the frequency converter, the main shaft is sleeved with an integrated controller and a permanent magnet rotor, a frequency converter cooling sleeve is installed between the integrated controller and the main shaft, a shielding sleeve is installed between the permanent magnet rotor and the main shaft, and cooling channels which are communicated are formed in the main shaft and the upper end silicon carbide guide sleeve respectively. A lower end cover of the shielding sleeve is provided with a cooling outlet. By means of built-in water-cooling heat dissipation, the water pump is good in heat dissipation effect, small in size, low in noise, long in service life of electrical elements and low in energy consumption, and the maximum energy efficiency of the water pump can be achieved under the action of the low-power constant-pressure liquid supplementing pump.

Description

Technical Field

[0001] The present invention belongs to the technical field of circulating pumps, and in particular relates to a built-in water-cooled, energy-doubled, permanent-magnet, variable-frequency, shielded intelligent circulating pump. Background Art

[0002] The permanent magnet variable frequency shielded circulation pump is a new generation of fluid conveying equipment that combines the leak-free structure of a shielded pump with permanent magnet variable frequency technology. Its core advantages include the use of a permanent magnet synchronous motor instead of a traditional asynchronous motor, coupled with a variable frequency controller to adjust flow on demand; a stainless steel shield sleeve and ceramic bearing structure that extends service life and eliminates leakage without the need for mechanical seals. Its application scenarios cover areas such as floor heating, corrosion-resistant chemical transportation, and nuclear power circulating water systems. It is particularly suitable for complex working conditions requiring high-temperature media (below 110°C) or intelligent flow regulation, making it a key equipment for industrial energy-saving transformation and upgrades to residential heating systems.

[0003] However, the inverter of the traditional permanent magnet variable frequency shielded circulation pump is large in size and has poor heat dissipation effect, which makes the electrical components easy to age and have a short life. It also has loud operating noise, high energy consumption, high production cost and waste of materials. Summary of the Invention

[0004] The purpose of the present invention is to overcome the existing defects and provide a built-in water-cooled multi-energy permanent magnet variable frequency shielded intelligent circulating pump.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A built-in water-cooled, double-energy permanent magnet variable-frequency shielded intelligent circulation pump includes a pump body, wherein the two ends of the pump body are respectively connected with a water inlet and a water outlet, an impeller is installed in the middle of the fluid channel of the pump body, a sealed motor barrel is installed on the upper end of the pump body, an end cover is installed on the top of the motor barrel by bolts, a connecting port is provided in the middle of the lower end of the end cover, a main shaft is movably installed in the middle of the motor barrel, an upper silicon carbide guide sleeve is installed between the outer side of the upper end of the main shaft and the inner wall of the connecting port, and the lower end of the main shaft is fixedly connected to the impeller;

[0007] The side of the motor barrel is connected to a frequency converter, a constant pressure pump is installed inside the frequency converter, the upper end of the constant pressure pump is connected to the constant pressure pump inlet at the top of the frequency converter, and the constant pressure pump outlet at the lower end of the constant pressure pump is connected to the fluid channel of the pump body;

[0008] An integrated controller and a permanent magnet rotor are provided on the outer sleeve of the main shaft, a frequency converter cooling sleeve is installed between the integrated controller and the main shaft, a shielding sleeve that is coordinated with the frequency converter cooling sleeve is installed between the permanent magnet rotor and the main shaft, the main shaft is connected to the shielding sleeve through a silicon carbide guide sleeve at the lower end, and interconnected cooling channels are respectively provided inside the main shaft and the upper silicon carbide guide sleeve, a main shaft cooling inlet is provided at the lower end of the main shaft, and a cooling outlet is provided at the lower end cover of the shielding sleeve.

[0009] Furthermore, an operation panel is installed on the front and rear sides of the frequency converter respectively, and the operation panel is connected to the integrated controller via a connecting line.

[0010] Furthermore, a power interface connected to the inverter is provided on the side of the motor barrel, and a sealing ring is installed between the outer side of the power interface and the outer casing of the inverter.

[0011] Furthermore, the pump body is provided with a pressure sensor mounting hole on the side of the water inlet, and a pressure sensor is mounted in the pressure sensor mounting hole.

[0012] Furthermore, a tapered shaft is provided at the lower end of the main shaft, the tapered shaft is located below the impeller installation position, and a locking cap is installed on the outer side of the tapered shaft.

[0013] Furthermore, a plurality of sealing rings are installed between the outer side of the connection port and the inverter cooling jacket.

[0014] Furthermore, a threaded countersunk hole is provided in the middle of the upper end of the connection port, and an exhaust bolt is installed in the threaded countersunk hole.

[0015] Furthermore, a motor flange is fixed to the lower end of the motor barrel, and the motor flange is connected to the upper end of the pump body through bolts.

[0016] In combination with the above technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0017] The present invention utilizes the principle of constant-pressure booster pump pressure to raise the water level to the required height, achieving a closed cycle and enabling the permanent magnet variable frequency pump to operate smoothly at maximum flow. Operating under constant pressure results in low noise, minimal cavitation, and a longer service life. The increased thermal conductivity of the pipe-liquid contact surface under constant pressure effectively improves thermal conductivity. The combination of the constant-pressure booster pump and the main pump can achieve high lift, large flow, and low energy consumption (for example, a lift of 180 meters would require significant power from existing high-flow pumps). This pump can be used as a hot and cold water circulation pump and is suitable for the air-to-air HVAC industry.

[0018] This invention utilizes built-in water cooling for excellent heat dissipation, compact size, low noise, minimal interference, long life of electrical components, low energy consumption, energy-saving aesthetics, and cost-effective production. It maximizes the efficiency of the water pump under the action of a low-power constant-pressure infusion pump (in a closed environment, the maximum head reaches 180 meters under the boost of a low-power constant-pressure infusion pump, enabling stable operation at maximum flow). This device is more efficient and energy-efficient, with a compact overall size and light weight, resulting in maximum material savings during manufacturing and greater environmental friendliness. Its dual-operation panel design facilitates operation in various installation environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a structural diagram of a built-in water-cooled, energy-doubled, permanent magnet, variable-frequency, shielded intelligent circulating pump provided by an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the motor barrel and the inverter provided by an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of a built-in water-cooled, energy-doubled, permanent magnet, variable frequency, shielded intelligent circulating pump provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of a shielding sleeve provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic structural diagram of a main shaft provided by an embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of an end cover provided by an embodiment of the present invention;

[0026] In the figure: 1. Pump body; 2. Water inlet; 3. Water outlet; 4. Frequency converter; 5. Operation panel; 6. Motor barrel; 7. Motor flange; 8. Constant pressure pump; 9. Constant pressure pump inlet; 10. Constant pressure pump outlet; 11. Impeller; 12. Main shaft; 13. Lower end cover; 14. Permanent magnet rotor; 15. UVW power supply; 16. Integrated controller; 17. Built-in radiator bracket; 18. End cover; 19. Shielding sleeve; 20. Exhaust bolt; 21. Pressure sensor mounting hole; 22. Frequency converter cooling jacket; 23. Upper silicon carbide guide sleeve; 24. Cooling channel; 25. Main shaft cooling inlet; 26. Cooling outlet; 27. Lower silicon carbide guide sleeve; 28. Power interface; 29. Connection port. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] like Figures 1 to 6 As shown, it is an embodiment of the built-in water-cooled double-energy permanent magnet variable frequency shielded intelligent circulation pump provided by the present invention, including a pump body 1, the two ends of the pump body 1 are respectively connected with a water inlet 2 and a water outlet 3, an impeller 11 is installed in the middle of the fluid channel of the pump body 1, a sealed motor barrel 6 is installed on the upper end of the pump body 1, an end cover 18 is installed on the top of the motor barrel 6 by bolts, a connecting port 29 is provided in the middle of the lower end of the end cover 18, a main shaft 12 is movably installed in the middle of the motor barrel 6, and the outer side of the upper end of the main shaft 12 is connected to the inner wall of the connecting port 29. An upper silicon carbide guide sleeve 23 is installed in the middle, and the lower end of the main shaft 12 is fixedly connected to the impeller 11; a frequency converter 4 is connected to the side of the motor barrel 6, and a constant pressure pump 8 is installed inside the frequency converter 4. The upper end of the constant pressure pump 8 is connected to the constant pressure pump inlet 9 at the top of the frequency converter 4, and the constant pressure pump outlet 10 at the lower end of the constant pressure pump 8 is connected to the fluid channel of the pump body 1; an integrated controller 16 and a permanent magnet rotor 14 are provided on the outer side of the main shaft 12, and the integrated controller 16 and the permanent magnet rotor 14 are connected through a UVW power supply 15 to power the coil of the permanent magnet rotor 14. A frequency converter cooling jacket 22 is installed between the integrated controller 16 and the main shaft 12, and a shielding jacket 19 that is connected to the frequency converter cooling jacket 22 is installed between the permanent magnet rotor 14 and the main shaft 12. The main shaft 12 is connected to the shielding jacket 19 through a lower silicon carbide guide sleeve 27. The main shaft 12 and the upper silicon carbide guide sleeve 23 are respectively provided with interconnected cooling channels 24. A main shaft cooling inlet 25 is provided at the lower end of the main shaft 12, and a cooling outlet 26 is provided at the lower end cover 13 of the shielding jacket 19.

[0029] Preferably, an operation panel 5 is installed on the front and rear sides of the frequency converter 4 in the embodiment of the present invention, respectively. The operation panel 5 is connected to the integrated controller 16 via a connecting line.

[0030] The embodiment of the present invention is provided with two operating panels 5 with different orientations, which can facilitate the adjustment operation of the circulation pump at different angles, is suitable for use in different installation scenarios, and has high flexibility.

[0031] Preferably, a power interface 28 connected to the inverter 4 is provided on the side of the motor barrel 6 in the embodiment of the present invention, and a sealing ring is installed between the outer side of the power interface 28 and the outer shell of the inverter 4.

[0032] The embodiment of the present invention can ensure the firm connection between the motor barrel 6 and the inverter 4 through the power interface 28, while facilitating the installation of the connection line.

[0033] Preferably, the pump body 1 in the embodiment of the present invention has a pressure sensor mounting hole 21 on the side of the water inlet 2, and a pressure sensor is installed in the pressure sensor mounting hole 21. The pressure sensor can collect pressure data in the pump body in real time, facilitating intelligent control of the constant pressure pump.

[0034] Preferably, the main shaft 12 in the embodiment of the present invention is provided with a tapered shaft at its lower end, the tapered shaft being located below the mounting position of the impeller 11, and a locking cap being mounted on the outer side of the tapered shaft. The tapered shaft and the locking cap ensure a secure connection with the impeller 11 and prevent loosening.

[0035] Preferably, a plurality of sealing rings are installed between the outer side of the connection port 29 and the inverter cooling jacket 22 in the embodiment of the present invention.

[0036] Preferably, a threaded countersunk hole is provided in the middle of the upper end of the connection port 29 in the embodiment of the present invention, and an exhaust bolt 20 is installed in the threaded countersunk hole.

[0037] Preferably, a motor flange 7 is fixed to the lower end of the motor barrel 6 in the embodiment of the present invention, and the motor flange 7 is connected to the upper end of the pump body 1 by bolts.

[0038] The operating principle of the present invention is described below in conjunction with the specific structure of the embodiment of the present invention.

[0039] 1. Fluid drive and pressure regulation mechanism:

[0040] Impeller power transmission: When permanent magnet rotor 14 generates a rotating magnetic field driven by the variable frequency current output by inverter 4, main shaft 12 achieves contactless transmission through magnetic coupling, driving impeller 11 to rotate at high speed. The centrifugal force of the impeller causes fluid to enter the fluid channel of pump body 1 from water inlet 2 and be discharged from water outlet 3 after acceleration.

[0041] Constant pressure maintenance system: Constant pressure pump 8 draws cooling medium from the top of the inverter 4 via constant pressure pump inlet 9 and injects the pressure-stabilized medium into the pump fluid channel through constant pressure pump outlet 10. Integrated controller 16 dynamically adjusts the inverter output frequency based on real-time pressure data fed back from pressure sensor mounting hole 21 to maintain system pressure at the set value.

[0042] 2. Water cooling circulation path:

[0043] Spindle cooling channel: The cooling water flows in from the spindle cooling inlet 25, flows through the cooling channel 24 of the spindle 12 and the upper silicon carbide guide sleeve 23 in sequence, and then enters the internal cavity of the inverter cooling sleeve 22 and the shielding sleeve 19. After absorbing the operating heat of the integrated controller 16 and the permanent magnet rotor 14, it is discharged from the cooling outlet 26 at the lower end of the shielding sleeve 19, forming forced convection cooling.

[0044] 3. Intelligent control and monitoring system:

[0045] Pressure closed-loop control: The pressure sensor installed in the pressure sensor mounting hole 21 monitors the water inlet pressure in real time. After the data is processed by the integrated controller 16, the inverter output parameters are automatically adjusted to achieve accurate matching of the pressure-flow characteristic curve.

[0046] Operator Interface Interaction: The dual operator panel 5 communicates with the integrated controller 16 via the CAN bus, supporting parameter settings, fault diagnosis, and operating status display. During initial startup, exhaust bolts 20 on the end cap 18 are used to vent system air to ensure proper cooling circulation.

[0047] 4. Mechanical seal and installation structure:

[0048] Multiple seal design: O-rings provide a static seal between the motor flange 7 and the pump body 1. Double-face mechanical seals, using silicon carbide guide sleeves, provide a contactless seal between the main shaft 12 and the motor barrel 6. A sealing ring at the power interface prevents liquids from invading the inverter 4.

[0049] Quick maintenance structure: The bolt connection method of the motor flange 7 facilitates the disassembly of the pump body. The lower end cover 13 adopts a quick-opening design. The tapered shaft and locking cap structure of the impeller 11 realize quick disassembly and assembly without tools.

[0050] This invention utilizes built-in water cooling for excellent heat dissipation, compact size, low noise, minimal interference, long life of electrical components, low energy consumption, energy-saving aesthetics, and cost-effective production. It maximizes the efficiency of the water pump under the action of a low-power constant-pressure infusion pump (in a closed environment, the maximum head reaches 180 meters under the boost of a low-power constant-pressure infusion pump, enabling stable operation at maximum flow). This device is more efficient and energy-efficient, with a compact overall size and light weight, resulting in maximum material savings during manufacturing and greater environmental friendliness. Its dual-operation panel design facilitates operation in various installation environments.

[0051] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A built-in water-cooled, double-energy permanent magnet variable-frequency shielded intelligent circulation pump, comprising a pump body, wherein the two ends of the pump body are respectively connected to a water inlet and a water outlet, and an impeller is installed in the middle of the fluid channel of the pump body, characterized in that: A sealed motor barrel is installed at the upper end of the pump body, an end cover is installed on the top of the motor barrel by bolts, a connecting port is provided in the middle of the lower end of the end cover, a main shaft is movably installed in the middle of the motor barrel, an upper silicon carbide guide sleeve is installed between the outer side of the upper end of the main shaft and the inner wall of the connecting port, and the lower end of the main shaft is fixedly connected to the impeller; The side of the motor barrel is connected to a frequency converter, a constant pressure pump is installed inside the frequency converter, the upper end of the constant pressure pump is connected to the constant pressure pump inlet at the top of the frequency converter, and the constant pressure pump outlet at the lower end of the constant pressure pump is connected to the fluid channel of the pump body; An integrated controller and a permanent magnet rotor are provided on the outer sleeve of the main shaft, a frequency converter cooling sleeve is installed between the integrated controller and the main shaft, a shielding sleeve that is coordinated with the frequency converter cooling sleeve is installed between the permanent magnet rotor and the main shaft, the main shaft is connected to the shielding sleeve through a silicon carbide guide sleeve at the lower end, and interconnected cooling channels are respectively provided inside the main shaft and the upper silicon carbide guide sleeve, a main shaft cooling inlet is provided at the lower end of the main shaft, and a cooling outlet is provided at the lower end cover of the shielding sleeve.

2. The built-in water-cooled, energy-doubled permanent magnet variable frequency shielded intelligent circulating pump according to claim 1 is characterized in that: An operation panel is installed on the front and rear sides of the frequency converter respectively, and the operation panel is connected to the integrated controller through a connecting line.

3. The built-in water-cooled, energy-doubled permanent magnet variable frequency shielded intelligent circulating pump according to claim 1 is characterized in that: A power interface connected to the frequency converter is provided on the side of the motor barrel, and a sealing ring is installed between the outer side of the power interface and the outer shell of the frequency converter.

4. The built-in water-cooled, energy-doubled permanent magnet variable frequency shielded intelligent circulating pump according to claim 1 is characterized in that: The pump body is provided with a pressure sensor mounting hole on the side of the water inlet, and a pressure sensor is mounted in the pressure sensor mounting hole.

5. The built-in water-cooled, energy-doubled permanent magnet variable frequency shielded intelligent circulating pump according to claim 1 is characterized in that: A tapered shaft is provided at the lower end of the main shaft, the tapered shaft is located below the impeller installation position, and a locking cap is installed on the outer side of the tapered shaft.

6. The built-in water-cooled, energy-doubled permanent magnet variable frequency shielded intelligent circulating pump according to claim 1 is characterized in that: A plurality of sealing rings are installed between the outer side of the connection port and the inverter cooling jacket.

7. The built-in water-cooled, energy-doubled permanent magnet variable frequency shielded intelligent circulating pump according to claim 1 is characterized in that: A threaded countersunk hole is provided in the middle of the upper end of the connection port, and an exhaust bolt is installed in the threaded countersunk hole.

8. The built-in water-cooled, energy-doubled permanent magnet variable frequency shielded intelligent circulating pump according to claim 1 is characterized in that: A motor flange is fixed to the lower end of the motor barrel, and the motor flange is connected to the upper end of the pump body through bolts.

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