A vertical stamping multi-stage magnetic force pump for a liquid cooling system and a temperature control method thereof

Abstract

This invention discloses a vertical multi-stage magnetic pump for a liquid cooling system and its temperature control method, comprising a pump head, a magnetic coupling, and a motor. A connecting frame is provided between the pump head and the motor, and a chamber for mounting the magnetic coupling is formed inside the connecting frame. The pump head has a pump shaft inside, and the magnetic coupling includes an inner rotor body and an outer rotor body. The outer rotor body is located inside the inner rotor body and is fixed to the output shaft of the motor. The inner rotor body is fixed to the pump shaft. A connecting hole is provided on the connecting frame to connect the chamber to the inside of the pump head, and an exhaust hole is provided on the connecting frame to connect the chamber to the outside. The vertical structure has a small footprint, saving a lot of space. The use of a reverse magnetic coupling structure makes more rational use of the pump's internal space and solves the exhaust problem of vertical magnetic pumps, ensuring that the magnetic pump can work normally for a long time and effectively extending its service life.

Description

Technical Field

[0001] This invention relates to the field of magnetic pumps, and in particular to a vertical stamping multistage magnetic pump for liquid cooling systems and its temperature control method. Background Technology

[0002] Magnetic pumps are widely used in liquid cooling systems. A magnetic pump is mainly composed of a pump head, a magnetic drive, and a motor. The magnetic drive consists of an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic materials, driving the inner magnetic rotor connected to the impeller to rotate synchronously, thus realizing contactless synchronous power transmission.

[0003] Currently, horizontal magnetic pumps are widely used, but they occupy a large area, resulting in low space utilization. Therefore, vertical magnetic pumps have been designed to achieve a smaller footprint. A search revealed Chinese patent CN104047867A, which discloses a vertical multi-stage magnetic pump for pipelines, including a drive section and a flow section. The flow section has a vertical structure. The drive section includes an outer magnetic rotor, an isolation sleeve, an inner magnetic rotor, a connecting frame, rolling bearings, a drive shaft, and a bearing housing. The drive shaft is fixed to the bearing housing via rolling bearings, and the outer magnetic rotor is fixed to the drive shaft. The isolation sleeve is sealed to the upper bearing section of the flow section. The inner magnetic rotor is placed inside the isolation sleeve and fixedly connected to the main shaft of the flow section. The inner and outer magnetic rotors of the drive section are magnetically driven. An electric motor drives the outer magnetic rotor to rotate, and the magnetic force passes through the isolation sleeve to drive the inner magnetic rotor to rotate. The inner magnetic rotor drives the impeller to perform work through the main shaft. This design features a compact structure, low noise, and a small footprint.

[0004] However, existing vertical magnetic pumps have an unresolved issue with internal venting during actual use, which can affect their normal operation and lifespan over time. Summary of the Invention

[0005] To further address the exhaust problem, this application provides a vertical stamping multistage magnetic pump for a liquid cooling system.

[0006] This application provides a vertical stamping multistage magnetic pump for a liquid cooling system, employing the following technical solution:

[0007] A vertical stamping multistage magnetic pump for a liquid cooling system includes a pump head, a magnetic coupling, and a motor. A connecting frame is provided between the pump head and the motor to connect the two. The connecting frame has a chamber for mounting the magnetic coupling. The pump head has a pump shaft inside. The magnetic coupling includes an inner rotor body and an outer rotor body. The outer rotor body is located inside the inner rotor body and is fixed to the output shaft of the motor. The inner rotor body is fixed to the pump shaft. The connecting frame has a connecting hole that connects the chamber to the inside of the pump head. The connecting frame also has an exhaust hole that connects the chamber to the outside.

[0008] Optionally, an exhaust valve is provided at the exhaust port.

[0009] Optionally, the inner rotor body has an inner magnet, the outer rotor body has an outer magnet, and an isolation sleeve is provided between the inner magnet and the outer magnet.

[0010] Optionally, a base is provided between the connecting frame and the motor, and the isolation sleeve wraps around the outer rotor body and its end is fixed to the base.

[0011] Optionally, the pump shaft end is fixed with a mounting base for mounting the inner rotor body. The mounting base is provided with an inner sleeve on the side near the outer rotor body. The inner sleeve and the mounting base form a closed mounting cavity for mounting the inner rotor body and the inner magnet.

[0012] Optionally, the pump head also includes an impeller and guide vanes, wherein the impeller, guide vanes, inner sleeve and isolation sleeve are all stamped and welded parts.

[0013] Optionally, a sealing ring is provided at the connection between the base and the connecting frame.

[0014] This application also provides a temperature control method for a vertical stamping multistage magnetic pump used in a liquid cooling system, comprising the following steps:

[0015] S1, set the normal operating temperature of the liquid cooling system to T0, and the maximum limit to T. max The initial speed of the pump is n0;

[0016] S2, the temperature value of the liquid cooling system is collected every once in a certain period of time, and the difference ΔT between the next temperature collection value and the previous temperature collection value is calculated;

[0017] S3, when the temperature T collected in S2 is less than T0, then judge the value of ΔT. If ΔT>0, the vertical stamping multi-stage magnetic pump maintains the current speed and returns to step S2. If ΔT<0, control the vertical stamping multi-stage magnetic pump to reduce the speed and return to step S2.

[0018] When the temperature T collected by S2 is greater than or equal to T0 and less than T maxAt this time, the vertical stamping multi-stage magnetic pump maintains the current speed and returns to step S2;

[0019] When the temperature T collected by S2 is greater than or equal to T max Then, determine the value of ΔT. If ΔT < 0, return to step S2. If ΔT > 0, control the vertical stamping multi-stage magnetic pump to increase the speed and return to step S2.

[0020] Optionally, the temperature acquisition interval in step S2 is 20-40 seconds.

[0021] Optionally, in step S3, the speed of the vertical stamping multi-stage magnetic pump after the speed decreases is controlled to be 0.95 times the current speed, and the speed of the vertical stamping multi-stage magnetic pump after the speed increases is controlled to be 1.1 times the current speed.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The vertical structure occupies a small area, saving a lot of space. It adopts a reverse magnetic coupling structure, which makes more reasonable use of the internal space of the pump and solves the exhaust problem of the vertical magnetic pump.

[0024] 2. The main parts inside the pump are stamped and welded components, which are lightweight and have low processing costs;

[0025] 3. By controlling the pump speed to change the flow rate, the heat dissipation effect of the liquid cooling system can be controlled. This method can ensure that the liquid cooling system remains within its normal operating temperature range for extended periods, avoiding unnecessary losses caused by excessively low or high temperatures. The pump achieves accurate temperature control of the liquid cooling system, reducing resource waste. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of Example 1.

[0027] Figure 2 This is a flowchart of Example 2.

[0028] Figure 3 This is a graph of time versus temperature from Example 2.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Pump head; 2. Magnetic coupling; 3. Motor; 4. Pump shaft; 5. Impeller; 6. Pump casing; 7. Connecting frame; 8. Chamber; 9. Inner rotor body; 10. Outer rotor body; 11. Mounting base; 12. Inner magnet; 13. Outer magnet; 14. Isolation sleeve; 15. Inner sleeve; 16. Base; 17. Fastener; 18. Connecting hole; 19. Vent hole; 20. Vent valve; 21. Sealing ring; 22. Bearing assembly; 23. Base; 24. Drain outlet; 25. Drain valve. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] Example 1

[0033] A vertical stamping multistage magnetic pump for liquid cooling systems, such as Figure 1 As shown, the pump head 1, magnetic coupling 2, and motor 3 are included. The motor 3 is vertically arranged and located above the pump head 1. The magnetic coupling 2 is located between the pump head 1 and the motor 3 and connects the two. The pump head 1 includes a pump shaft 4, an impeller 5, a guide vane, and a pump cylinder 6. The impeller 5 and the guide vane are both arranged inside the pump cylinder 6. The impeller 5 is fixed on the pump shaft 4 and rotates accordingly. One end of the pump shaft 4 is connected to the output end of the motor 3 through the magnetic coupling 2. A connecting frame 7 is provided between the motor 3 and the pump head 1 to connect the two. The connecting frame 7 is hollow inside and forms a chamber 8. The chamber 8 is used for the installation of the magnetic coupling 2.

[0034] like Figure 1 As shown, the magnetic coupling 2 includes an inner rotor body 9 and an outer rotor body 10, which are concentrically arranged. The outer rotor body 10 is located inside the inner rotor body 9. The inner rotor body 9 has a mounting base 11 fixed thereto and is fixed to the end of the pump shaft 4 through the mounting base 11. The inner rotor body 9 has an inner magnet 12 on the side near the outer rotor body 10. The outer rotor body 10 is fixed to the output end of the motor 3. Similarly, the outer rotor body 10 has an outer magnet 13 on the side near the inner rotor body 9, and an isolation sleeve 1 is provided between the outer magnet 13 and the inner magnet 12 to isolate them. 4. The isolation sleeve 14 is U-shaped and covers the outer rotor body 10 and the outer magnet 13. An inner sleeve 15 is also provided on the mounting base 11 to seal and cover the inner rotor body 9 and the inner magnet 12. This can achieve good sealing protection for the outer rotor body 10 and the inner rotor body 9. A base 16 is provided between the connecting frame 7 and the motor 3. The motor 3 and the connecting frame 7 are tightened and fixed by fasteners 17. The base 16 is located between the motor 3 and the connecting frame 7 and is pressed and fixed synchronously. The fasteners 17 are tie bolts and nuts. Both ends of the isolation sleeve 14 are fixed on the base 16.

[0035] like Figure 1As shown, a connecting hole 18 is provided at the bottom of the connecting frame 7, connecting the chamber 8 and the inside of the pump cylinder 6. At the same time, an exhaust hole 19 is provided on the top side wall of the connecting frame 7, and an exhaust valve 20 is provided on the exhaust hole 19. The exhaust hole 19 connects the chamber 8 to the outside. In this way, when liquid is added before the pump is run, the gas inside the pump can be discharged through this hole, which effectively solves the exhaust problem of the vertical magnetic pump. During this process, the water in the pump head 1 can enter the chamber 8 through the connecting hole 18 to cool the magnetic coupling 2, thus simultaneously cooling down the magnetic coupling 2. This allows the magnetic coupling 2 to operate in a better state. The isolation sleeve 14 can effectively isolate the chamber 8 from the motor 3 and the outer rotor 10, preventing moisture in the chamber 8 from entering the motor 3 and the outer rotor 10. In addition, a sealing ring 21 is provided between the connecting frame 7 and the base 16. The sealing ring 21 can improve the sealing of the connection and effectively prevent liquid leakage in the pump. The above solution adopts a reverse magnetic coupling structure, which makes more reasonable use of the pump space and effectively solves the exhaust problem of the vertical magnetic pump.

[0036] like Figure 1 As shown, in this embodiment, the inner sleeve 15, the isolation sleeve 14, the impeller 5, and the guide vane are all stamped and welded parts, and the specific material can be stainless steel. They are fixed by welding. The two ends of the isolation sleeve 14 are welded and fixed to the base 16, and the inner sleeve 15 is welded and fixed to the mounting base 11, which greatly saves materials and parts processing time and effectively reduces the overall weight.

[0037] like Figure 1 As shown, bearing assemblies 22 are provided at both ends of the pump shaft 4 to provide radial support for it. The bearing assemblies 22 provide radial and axial support for the entire rotating shaft system, thereby improving the rotational stability of the pump shaft 4. In addition, there is a base 23 connected to the bottom of the pump cylinder 6. The interior of the base 23 is connected to the pump cylinder 6, and a drain port 24 is provided on one side of the base 23 to connect with the outside. The drain port 24 connects the interior of the base 23 with the outside. A drain valve 25 is provided at the drain port 24. In actual use, the residual liquid inside the pump head 1 can be discharged by opening the drain valve 25.

[0038] Example 2

[0039] A temperature control method for a vertical stamping multistage magnetic pump used in a liquid cooling system, such as... Figure 2 and Figure 3 As shown, Example 1 is applied to a liquid cooling system to achieve good temperature control. The heat dissipation method of the liquid cooling system is mainly forced convection cooling, and its heat dissipation effect is closely related to the liquid flow rate. In the liquid cooling system, the liquid flow rate is mainly controlled by the pump. As can be seen from the formula, the pump speed and flow rate have a linear relationship. When the structure of the liquid cooling system remains unchanged, the speed and flow rate also have a linear relationship. In the formula, n is the pump speed and Q is the flow rate.

[0040] The normal operating temperature of the liquid cooling system is set to T0, and the maximum limit is T. max The pump's initial speed is n0, and the temperature is collected every 30 seconds. Control flow. Figure 2 As shown, ΔT = TT represents the difference between the previous and subsequent temperature acquisition values. A positive value indicates that the temperature is continuously rising, while a negative value indicates that the temperature is continuously falling.

[0041] When the collected temperature T is less than T0, the value of ΔT is determined. If it is not negative, it means that the temperature is continuously rising but has not yet reached the normal operating temperature of the liquid cooling system. At this time, the current speed is maintained and the process returns to the beginning of the loop. If it is negative, it means that the temperature is continuously decreasing. At this time, in order to avoid unnecessary waste of resources, the speed is changed to 0.95 times the current speed and the process returns to the beginning of the loop.

[0042] When the collected temperature T is greater than or equal to T0 and less than T max At this time, the liquid cooling system is in its normal operating range. To avoid frequent changes in the pump's operating conditions, the pump maintains its current speed during this interval.

[0043] When the collected temperature T is greater than or equal to T max When the time is right, check the value of ΔT. If it is negative, it means that the temperature is continuously decreasing. At this time, do not change the speed and return to the beginning of the loop. If it is not negative, it means that the temperature is continuously increasing. This indicates that the heat dissipation at this speed is not enough. The speed needs to be increased to increase the flow rate. Therefore, the speed becomes 1.1 times the current speed and return to the beginning of the loop.

[0044] The aforementioned temperature control method controls the flow rate by adjusting the pump speed, thereby controlling the heat dissipation effect of the liquid cooling system. This method ensures that the liquid cooling system remains within its normal operating temperature range for extended periods, avoiding unnecessary losses caused by excessively low or high temperatures. Accurate temperature control of the liquid cooling system is achieved through a vertical, multi-stage magnetic pump, reducing resource waste.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A temperature control method for a vertical stamping multistage magnetic pump used in a liquid cooling system, characterized in that, The vertical stamping multistage magnetic pump for liquid cooling system includes a pump head (1), a magnetic coupling (2), and a motor (3). A connecting frame (7) is provided between the pump head (1) and the motor (3) to connect the two. The connecting frame (7) forms a chamber (8) for installing the magnetic coupling (2). The pump head (1) has a pump shaft (4) inside. The magnetic coupling (2) includes an inner rotor body (9) and an outer rotor body (10). The outer rotor body (10) is located inside the inner rotor body (9). The outer rotor body (10) is fixed to the output shaft of the motor (3). The inner rotor body (9) is fixed to the pump shaft (4). The connecting frame (7) has a connecting hole (18) that connects the chamber (8) and the inside of the pump head (1). The connecting frame (7) has an exhaust hole (19) that connects the chamber (8) to the outside. The pump head (1) also includes the following steps: S1, set the normal operating temperature of the liquid cooling system to T0, the maximum limit to Tmax, and the initial pump speed to n0; S2, periodically collects the temperature value of the liquid cooling system and calculates the difference between the next collected temperature value and the previous collected temperature value. ; S3, when the temperature T collected by S2 is less than T0, then make a judgment. Value, if If >0, the vertical multi-stage magnetic pump maintains its current speed and returns to step S2. <0, control the vertical stamping multi-stage magnetic pump to reduce speed and return to step S2; When the temperature T collected by S2 is greater than or equal to T0 and less than Tmax, the vertical stamping multi-stage magnetic pump maintains the current speed and returns to step S2; When the temperature T collected by S2 is greater than or equal to Tmax, then a judgment is made. value, If < 0, return to step S2. >0, control the vertical stamping multi-stage magnetic pump to increase the speed and return to step S2.

2. The temperature control method for a vertical stamping multistage magnetic pump for a liquid cooling system according to claim 1, characterized in that: The temperature acquisition interval in step S2 is 20-40 seconds.

3. The temperature control method for a vertical stamping multistage magnetic pump for a liquid cooling system according to claim 1, characterized in that: In step S3, the speed of the vertical stamping multi-stage magnetic pump after decreasing its speed is controlled to be 0.95 times the current speed, and the speed of the vertical stamping multi-stage magnetic pump after increasing its speed is controlled to be 1.1 times the current speed.

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