Cooling device for magnetic suspension high-speed pump

Abstract

The invention relates to a cooling device for a magnetic suspension high-speed pump. The cooling device comprises a pump body, an inducer, a volute, an impeller, a pump cover, a sealing body, a shaft, a shaft sleeve, a magnetic suspension motor and a cooling jacket integrated in the pump body. A sleeve type cooling flow channel surrounding heating areas of the shaft and the shaft sleeve as well as the impeller and the sealing body is formed in the cooling jacket; a cooling medium inlet and a cooling medium outlet which are communicated with the sleeve type cooling flow channel are formed in the cooling jacket; and the cooling medium inlet and the cooling medium outlet are connected with an external cooling loop through pipe joints. The cooling flow channel is directly integrated in the pump cover, the overall structure is greatly simplified, the number of parts is reduced, and the manufacturing cost and potential fault points are reduced. The sleeve type flow channel design increases the heat exchange area, the turbulent flow structure strengthens the heat exchange process, and heat can be taken away rapidly and evenly. The magnetic suspension pump is compact in structure, small in change of an existing magnetic suspension pump and easy to adapt.

Description

Technical Field

[0001] This invention relates to a cooling device, specifically a highly integrated, efficient heat dissipation, uniform temperature control, and compact cooling device for a magnetic levitation high-speed pump. Background Technology

[0002] Magnetic levitation pumps, such as magnetic levitation bearingless pumps, magnetic levitation turbine vacuum pumps, and magnetic levitation molecular pumps, utilize magnetic levitation bearing technology to achieve contactless and frictionless levitation operation of the rotor. They offer significant advantages such as high efficiency, energy saving, and long lifespan, and are widely used in semiconductor, chemical, and vacuum production fields. However, magnetic levitation motors and pump bodies generate a large amount of heat during high-speed operation. If this heat cannot be dissipated in time, it will lead to excessive temperature rise in the device, affecting the control accuracy of the motor and the hydraulic performance of the impeller, and may even cause equipment failure or damage.

[0003] Currently, there are two main cooling methods for magnetic levitation pumps: air cooling and water cooling. Traditional air cooling solutions often use external fans, as shown in patent CN218542636U, which integrates the external fan with the pump body. While this simplifies installation, air cooling capacity is limited, especially under high-temperature or high-load conditions, making it difficult to meet the demand for rapid cooling. Traditional water cooling solutions, as shown in patent CN116950933B, typically require a separate circulating pump, water tank, radiator, and control system, forming a complex water cooling system. Although this solution has strong heat dissipation capacity, it introduces additional power units, control units, and numerous pipe joints, increasing the overall size, cost, and power consumption of the equipment. Furthermore, the increased number of components reduces the system's reliability. If the independent water cooling system fails (such as the water pump stopping), the magnetic levitation motor will be rapidly damaged due to overheating.

[0004] Furthermore, some magnetic levitation pumps have recessed structures (such as mounting slots) in their design, which hinder airflow and create heat dissipation dead zones, further exacerbating the risk of localized overheating. Therefore, there is an urgent need for a cooling solution that is simple in structure, highly efficient and reliable, and can be deeply integrated with the pump unit.

[0005] Therefore, we propose a cooling device for a magnetic levitation high-speed pump to solve the above problems. Summary of the Invention

[0006] To address the aforementioned problems, the main objective of this invention is to provide a highly integrated, efficient heat dissipation, uniform temperature control, and compact cooling device for magnetic levitation high-speed pumps.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution: a cooling device for a magnetic levitation high-speed pump, the cooling device for the magnetic levitation high-speed pump comprising: It includes the pump body, inducer, volute, impeller, pump cover, seal, shaft, bushing, magnetic levitation motor, and cooling jacket integrated into the pump body.

[0008] The cooling jacket has a sleeve-shaped cooling channel inside that surrounds the heating areas of the shaft, bushing, impeller, and seal.

[0009] The cooling jacket is provided with a cooling medium inlet and a cooling medium outlet that communicate with the sleeve-type cooling channel.

[0010] The cooling medium inlet and cooling medium outlet are connected to the external cooling circuit via pipe joints.

[0011] In a specific embodiment of the present invention, the cross-section of the sleeve-type cooling channel is two rectangles that are symmetrical about the axis and have one corner rounded, and the channel wall is provided with turbulence ribs that cause the cooling medium to generate vortices.

[0012] In a specific embodiment of the present invention, the shape of the turbulence rib is cylindrical or conical.

[0013] In a specific embodiment of the present invention, the cooling jacket is made of a metal material with good thermal conductivity, and is fixedly connected to the pump cover by integral molding, and is fixedly connected to the shaft, impeller, sealing body and magnetic levitation motor on the same axial surface.

[0014] In a specific embodiment of the present invention, the cooling jacket and the pump cover are fused together, and both the cooling medium inlet and the cooling medium outlet are fitted with standard pipe fittings via threaded connections.

[0015] In a specific embodiment of the present invention, the device further includes temperature sensors distributed inside the volute, pump cover, and sealing body. The temperature sensors are electrically connected to an external control system and are used to monitor the motor temperature in real time and adjust the flow rate of the external cooling circuit.

[0016] In a specific embodiment of the present invention, the cooling medium inlet and cooling medium outlet are directly connected to the factory's centralized cooling water network to form a closed-loop system.

[0017] The positive and progressive effects of this invention are as follows: The cooling device for a magnetic levitation high-speed pump provided by this invention has the following advantages: 1. High integration and simplified structure: The cooling channel is directly integrated into the pump cover, eliminating the need for independent rotating blades, permanent magnet drive units, or complex external air-water mixing systems. This greatly simplifies the overall structure, reduces the number of parts, and lowers manufacturing costs and potential failure points.

[0018] 2. High-efficiency heat dissipation and uniform temperature control: The sleeve-type flow channel design increases the heat exchange area, and the turbulence structure enhances the heat exchange process, which can quickly and evenly remove heat, effectively solving the heat dissipation problem in dead corners such as device recesses, and ensuring that the temperature rise of core components is controlled within a safe range.

[0019] 3. High adaptability and flexible application: The device has a compact structure, requires minimal modification to existing magnetic levitation pumps, and is easy to adapt. It can form an independent system with a simple radiator, or it can be easily connected to the existing cooling network in the factory, making it suitable for a wide range of scenarios. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the pump cover, cooling jacket, and sleeve-type flow channel in this invention.

[0022] Figure 3-1 This is one of the structural schematic diagrams of the turbulence rib in this invention.

[0023] Figure 3-2 This is the second schematic diagram of the turbulence rib in this invention.

[0024] The following are the names corresponding to the reference numerals in this invention: In the diagram: 1. Pump body; 2. Inducer wheel; 3. Volute; 4. Impeller; 5. Pump cover; 6. Cooling jacket; 7. Sleeve-type flow channel; 8. Pipe joint; 9. Cooling medium inlet; 10. Cooling medium outlet; 11. Seal; 12. Shaft; 13. Shaft sleeve; 14. Magnetic levitation motor; 15. Turbulence rib. Detailed Implementation

[0025] The preferred embodiments of the present invention are given below with reference to the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 2 This is a schematic diagram of the structure of the pump cover, cooling jacket, and sleeve-type flow channel in this invention. Figure 3-1 This is one of the structural schematic diagrams of the turbulence rib in this invention. Figure 3-2 The second schematic diagram of the turbulence rib in this invention is shown in the figure above. The core of the cooling device for the magnetic levitation high-speed pump proposed in this invention is to deeply integrate the cooling function into the pump cover 5 and to fit tightly with the impeller 4, the sealing body 11 and other components.

[0027] The pump cover 5 has flow-through components such as an impeller 4 at its front end, and its rear end is fixedly connected to the housing of the sealing body 11 and the magnetic levitation motor 14 by bolts. The cooling jacket 6 is essentially a cavity structure formed within the wall of the pump cover 5 through precision machining or casting. This cavity is designed as a sleeve-type cooling channel 7 surrounding the heat-generating areas such as the bushing 13, impeller 4, and sealing body 11. The channel cross-section is preferably a rectangle with one rounded corner, and multiple staggered turbulence ribs 15 are integrally formed on its upper and lower walls to disturb the coolant flow and improve heat exchange efficiency. The turbulence ribs 15 can be cylindrical or conical, as shown in the reference. Figure 3-1 and 3-2 .

[0028] The cooling jacket 6 in this invention is cast from an alloy with high thermal conductivity and is integrally cast with the pump cover 5 to ensure the shortest heat conduction path and the lowest thermal resistance. At the ends of the cooling jacket 6, a cooling medium inlet 9 and a cooling medium outlet 10 are machined, and a standard pipe connector 8 is installed via a threaded connection for connecting to external cooling pipes. The cooling jacket 6 is fixedly connected to the shaft 13, impeller 4, sealing body 11, and magnetic levitation motor 14 on the same axial surface.

[0029] In a preferred embodiment, a PT100 temperature sensor (not shown in the figure) is embedded in the pump cover 5 and other devices, with its signal line led out to the motor junction box. This sensor is connected to a PLC control system. When the motor temperature exceeds a set threshold, the PLC can adjust the external cooling medium delivery frequency, increasing the coolant flow rate to achieve dynamic, on-demand cooling, thus achieving energy savings while ensuring effective heat dissipation.

[0030] The external cooling circuit directly connects the cooling medium inlet 9 and outlet 10 to the plant's cooling water supply and return network, forming a closed-loop unit. Both the cooling medium inlet 9 and outlet 10 are fitted with standard pipe fittings 8 via threaded connections. In this invention, the cooling medium inlet 9 and outlet 10 are directly connected to the plant's centralized cooling water network, forming a closed-loop system.

[0031] During operation, the cooling medium, driven by external power, flows from the cooling medium inlet 9 into the sleeve-type cooling channel 7. The cooling medium flows closely to the heated components such as the bushing, efficiently absorbing the heat generated by high-speed rotation through the metal walls. The turbulence ribs 15 in the channel create vortices in the cooling medium, breaking up the laminar flow layer and greatly enhancing heat transfer. The heated cooling medium flows out from the outlet 10, carrying the heat to an external heat dissipation device for dissipation. After cooling, it recirculates back in, thus continuously and stably carrying away the heat generated by the magnetic levitation pump.

[0032] This invention achieves efficient, reliable, and low-cost cooling of magnetic levitation high-speed pumps through the above-mentioned integrated design without built-in power components, making it particularly suitable for applications with stringent requirements for reliability, size, and cost.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A cooling device for a magnetically levitated high-speed pump, characterized in that: The cooling device for the magnetic levitation high-speed pump: It includes the pump body, inducer, volute, impeller, pump cover, seal, shaft, bushing, magnetic levitation motor, and cooling jacket integrated into the pump body; The cooling jacket has a sleeve-type cooling channel that surrounds the heating areas of the shaft, bushing, impeller, and seal. The cooling jacket is provided with a cooling medium inlet and a cooling medium outlet that communicate with the sleeve-type cooling channel; The cooling medium inlet and cooling medium outlet are connected to the external cooling circuit via pipe joints.

2. The cooling device for a magnetic levitation high-speed pump according to claim 1, characterized in that: The cross-section of the sleeve-type cooling channel is two rectangles that are symmetrical about the axis and have one corner rounded. Turbulence ribs are provided on the channel wall to generate vortices in the cooling medium.

3. The cooling device for a magnetic levitation high-speed pump according to claim 2, characterized in that: The ribs are cylindrical or conical in shape.

4. The cooling device for a magnetic levitation high-speed pump according to claim 1, characterized in that: The cooling jacket is made of a metal material with good thermal conductivity. It is fixedly connected to the pump cover by integral molding and is fixedly connected to the shaft, impeller, sealing body and magnetic levitation motor on the same axial surface.

5. The cooling device for a magnetic levitation high-speed pump according to claim 1, characterized in that: The cooling jacket and pump cover are fused together as one piece, and both the cooling medium inlet and outlet are fitted with standard pipe fittings via threaded connections.

6. The cooling device for a magnetically levitated high-speed pump according to claim 1, characterized in that: The device also includes temperature sensors distributed inside the volute, pump cover, and seal. The temperature sensors are electrically connected to an external control system and are used to monitor the motor temperature in real time and adjust the flow rate of the external cooling circuit.

7. The cooling device for a magnetic levitation high-speed pump according to claim 1, characterized in that: The cooling medium inlet and outlet are directly connected to the factory's centralized cooling water network, forming a closed-loop system.

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