Passive liquid cooling heat dissipation device for magnetic suspension pump

Abstract

The utility model relates to a passive liquid cooling heat dissipation device for a magnetic suspension pump, which comprises a water circulation device and a water tank, the water circulation device comprises a first permanent magnet, a rotor and a mounting rack, the first permanent magnet rotates relative to the mounting rack, the rotor is fixedly connected with the first permanent magnet, the rotor comprises blades, the N poles and the S poles of the first permanent magnet are alternately arranged in the circumference, and the water tank is arranged in the water tank. The blades are used for driving liquid in the water tank to flow. The first permanent magnets are driven by the second permanent magnets, so that the blades rotate to generate water flow, heat on the surface of the machine shell is transmitted to the box body and / or the radiator through liquid, rotation of the blades does not need to be driven by an extra power system such as a motor and does not need to be powered by a power source either, and then the liquid cooling cost of the magnetic suspension pump is reduced; the water circulation device is installed in the first groove, a power source and a power system are not needed, the water tank is fixed to the end of the machine shell, and the passive liquid cooling heat dissipation device can be installed on an existing magnetic suspension pump in a matched mode without structural modification.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic levitation pump cooling, in particular to a passive liquid cooling and heat dissipation device for a magnetic levitation pump. Background Technique

[0002] The magnetic levitation bearingless pump (magnetic levitation pump) belongs to the combination of a centrifugal pump (pump head), a permanent magnet synchronous motor (magnetic levitation motor), and magnetic levitation control. The main operating mechanism is to generate a suspension and rotation magnetic field through the suspension and rotation coils of the motor stator, and then perform non-contact control on the permanent magnet rotor in the centrifugal pump (pump head) through the magnetic field. Specifically, the suspension magnetic field actively controls the radial suspension of the rotor in the X and Y2 degrees of freedom, the rotation magnetic field controls the rotation of the rotor around the Z axis, and finally, the remaining 3 degrees of freedom of passive suspension control are realized by means of the permanent magnet force and the reluctance principle.

[0003] Since the magnetic levitation motor has no main shaft and cannot be cooled by installing a cooling fan on the main shaft like a common motor, some existing magnetic levitation motors adopt a water cooling method, and the water cooling system requires independent power, power supply, and control units. The additional components of the independent water cooling system increase the overall cost and volume of the magnetic levitation bearingless pump, and also reduce the reliability with the increase of components (for example, if the independent cooling system fails and the speed decreases or stops, it will cause the magnetic levitation motor to be damaged due to overheating).

[0004] The casing of the existing magnetic levitation motor is formed with an inwardly concave first groove, and the inwardly concave structure causes poor heat dissipation inside the first groove. Content of the Utility Model

[0005] The utility model aims to solve the above problems and provides a passive air cooling system for a magnetic levitation motor, which solves the above technical problems.

[0006] A passive liquid cooling and heat dissipation device for a magnetic levitation pump, comprising: a water circulation device and a water tank. The water circulation device includes a first permanent magnet, a rotor, and a mounting frame. The first permanent magnet rotates relative to the mounting frame. The rotor is fixedly connected to the first permanent magnet. The rotor includes blades. The N poles and S poles of the first permanent magnet are arranged alternately in a circular pattern. The blades are used to drive the liquid in the water tank to flow.

[0007] Further, the mounting frame includes a base and a fixed shaft. The first permanent magnet rotates around the fixed shaft, and the base is integrally formed with the end of the fixed shaft.

[0008] Further, the rotor further includes a cylinder body. The first permanent magnet is inserted into the cylinder body and fixedly connected to the cylinder body. The cylinder body is fixedly connected to a plurality of blades.

[0009] Further, the water circulation device further includes a bearing, which is located inside the cylinder body and sleeved outside the fixed shaft, and the inner ring and outer ring of the bearing are fixedly connected to the fixed shaft and the cylinder body respectively.

[0010] Further, the water circulation device further includes a limit block, which is fixedly connected to the fixed shaft. The fixed shaft is formed with a limiting surface, and the limit block and the limiting surface are respectively in contact with both ends of the bearing.

[0011] Further, the water tank includes a box body and a pipe body, which are fixedly connected. A second cavity is formed on one side of the first end face of the box body close to the pipe body. A pipe inner cavity is formed inside the pipe body. The second cavity and the pipe inner cavity are communicated at the water circulation device, and the water circulation device is located at one end of the pipe body away from the box body.

[0012] Further, a radiator is further included. The water tank is formed with a water inlet and a water outlet, and the radiator is respectively communicated with the water inlet and the water outlet.

[0013] Further, a first cavity is formed inside the box body, and a connecting through hole is formed on the first end face. The connecting through hole connects the first cavity and the second cavity.

[0014] Further, a third heat sink is formed on the outer side of the box body.

[0015] Further, the blades are arranged in a uniform circular pattern, and the N poles and S poles of the first permanent magnets are arranged in a uniform circular alternating pattern.

[0016] The utility model has the following advantages:

[0017] 1. The first permanent magnet is driven by the second permanent magnet, so that the blades rotate to generate water flow, and the heat on the surface of the casing is transferred to the box body and / or the radiator through the liquid. The rotation of the blades does not require an additional power system such as a motor to drive and also does not require power supply, reducing the number of components of the heat dissipation system, and thus reducing the cost of liquid cooling of the magnetic levitation pump.

[0018] 2. The first permanent magnet and the second permanent magnet move synchronously, so that the blades are synchronously adjusted according to the rotation speed of the second permanent magnet, thereby changing the liquid flow rate according to the rotation speed of the second permanent magnet, and further changing the heat dissipation speed, without the need to adopt additional sensors and control systems to control the rotation speed of the blades.

[0019] 3. The heat is transferred to the box body and / or the radiator through the liquid, and the box body and / or the radiator dissipate the heat into the air, dissipating the heat in the first groove that is difficult to dissipate heat, and at the same time increasing the heat dissipation area, and thus increasing the heat dissipation efficiency.

[0020] 4. The water circulation device is installed in the first groove, without the need for a power supply and a power system. The water tank is fixed to the end of the casing, and the existing magnetic levitation bearingless pump (magnetic levitation pump) can be adapted to install the passive liquid cooling and heat dissipation device without structural modification. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0022] Figure 1 : Three-dimensional structure schematic diagram of the present invention;

[0023] Figure 2 : Cross-sectional structure schematic diagram of the water circulation device;

[0024] Figure 3 : Three-dimensional structure schematic diagram of the vertical magnetic levitation pump (the pump head is not shown);

[0025] Figure 4 : Figure 3 Three-dimensional structure schematic diagram after removing the water tank in;

[0026] Figure 5 : Top view structure schematic diagram of the vertical magnetic levitation pump (the pump head is not shown);

[0027] Figure 6 : Figure 5 Cross-sectional structure schematic diagram at A-A in;

[0028] Figure 7 : Three-dimensional structure schematic diagram of the horizontal magnetic levitation pump (the pump head is not shown);

[0029] Figure 8 : Figure 7 Three-dimensional structure schematic diagram after removing the water tank in;

[0030] Figure 9 : Figure 7 Three-dimensional structure schematic diagram of the water tank in;

[0031] Figure 10 : Rear view structure schematic diagram of the horizontal magnetic levitation pump;

[0032] Figure 11 : Figure 10 Cross-sectional structure schematic diagram at B-B in;

[0033] Figure 12 : Cross-sectional structure schematic diagram of the horizontal magnetic levitation pump. Detailed implementation mode

[0034] The following further describes the present utility model in conjunction with the accompanying drawings and examples:

[0035] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0038] As Figure 1 and Figure 2 shown, a passive liquid cooling and heat dissipation device for a magnetic levitation pump includes: a water circulation device and a water tank 7. The water circulation device includes a first permanent magnet 1, a rotor 2, and a mounting bracket 3. The first permanent magnet 1 rotates relative to the mounting bracket 3. The rotor 2 is fixedly connected to the first permanent magnet 1. The rotor 2 includes blades 22. The N poles and S poles of the first permanent magnet 1 are arranged alternately in a circle. The blades 22 are used to drive the liquid in the water tank 7 to flow. The liquid is between the water tank 7 and the housing 6 of the magnetic levitation pump, and the liquid contacts the housing 6 for heat exchange to transfer the heat of the housing 6 to the liquid.

[0039] There are two driving methods for the rotation of the first permanent magnet 1. The first one is that the stator of the magnetic levitation motor (not shown in the figure) is located radially outside the first permanent magnet 1, and the stator of the magnetic levitation motor drives the first permanent magnet 1 to rotate under the action of magnetic force; the second one is that the second permanent magnet 91 inside the pump head 9 is located at the end of the first permanent magnet 1, and the opposite magnetic poles of the first permanent magnet 1 and the second permanent magnet 91 correspond to each other. The first permanent magnet 1 rotates synchronously with the second permanent magnet 91 due to the attraction of opposite magnetic poles. AsFigure 6 and Figure 11 as shown. The second driving method is adopted in the following embodiments.

[0040] Furthermore, the mounting bracket 3 includes a base 31 and a fixed shaft 32. The first permanent magnet 1 rotates about the fixed shaft 32, and the base 31 is integrally formed with the end of the fixed shaft 32. Preferably, the fixed connection manner between the base 31 and the casing 6 can be conventional fixing methods such as threaded connection, brazing, clamping or bonding. Preferably, the base 31 is formed with a first fixed through hole 311, and a screw passes through the first fixed through hole 311 and is threadedly connected to the bottom surface of the first groove 63 of the casing 6 to fix the base 31 and the casing 6.

[0041] Furthermore, the rotor 2 further includes a cylinder body 21. The first permanent magnet 1 is inserted into the cylinder body 21 and fixedly connected to the cylinder body 21. The cylinder body 21 is fixedly connected to a plurality of blades 22. The cylinder body 21 provides a mounting and fixing space for the first permanent magnet 1, and the cylinder body 21 is fixedly connected to a plurality of blades 22.

[0042] Furthermore, the water circulation device further includes a bearing 4. The bearing 4 is located inside the cylinder body 21 and sleeved outside the fixed shaft 32. The inner ring and the outer ring of the bearing 4 are respectively fixedly connected to the fixed shaft 32 and the cylinder body 21. The bearing 4 is used to reduce the frictional resistance, and at the same time, it also limits the first permanent magnet 1 and the cylinder body 21, so that the first permanent magnet 1 and the cylinder body 21 have only one degree of rotational freedom.

[0043] Furthermore, the water circulation device further includes a limiting block 5. The limiting block 5 is fixedly connected to the fixed shaft 32. The fixed shaft 32 is formed with a limiting surface 321. The limiting block 5 and the limiting surface 321 are respectively in contact with both ends of the bearing 4. The limiting surface 321 plays a role in positioning and limiting the inner ring of the bearing 4. Preferably, the limiting block 5 is threadedly connected to the fixed shaft 32.

[0044] Furthermore, the water tank 7 includes a box body 71 and a pipe body 72. The box body 71 and the pipe body 72 are fixedly connected. A second cavity 702 is formed on one side of the first end face 710 of the box body 71 close to the pipe body 72. A pipe inner cavity 703 is formed inside the pipe body 72. The second cavity 702 and the pipe inner cavity 703 are connected and communicated at the water circulation device. The water circulation device is located at one end of the pipe body 72 away from the box body 71.

[0045] Furthermore, a radiator is further included. The water tank 7 is formed with a water inlet 73 and a water outlet 74. The radiator is respectively connected and communicated with the water inlet 73 and the water outlet 74.

[0046] There are three ways to dissipate heat of the liquid:

[0047] The first is to dissipate heat from the box body 71. A first cavity 701 is formed inside the box body 71, and the first cavity 701 communicates with a second cavity 702. The liquid exchanges heat and absorbs heat with the machine housing 6 in the second cavity 702, and then, driven by the rotating blade 22, the liquid flows into the inner cavity 703 of the pipe body. After passing through the inner cavity 703 of the pipe body, the liquid enters the first cavity 701, and the liquid exchanges heat and releases heat with the part of the box body 71 away from the machine housing 6, thereby transferring the heat to the box body 71, and the box body 71 dissipates the heat into the air. The cooled liquid flows back into the second cavity 702 from the connection through-hole 711, and the liquid circulates in this way to quickly export the heat of the machine housing 6.

[0048] This method does not require an additional radiator. The heat of the machine housing 6 is transferred to the box body 71 by transferring heat through the liquid. Since the air exchange speed in the first groove 63 of the machine housing 6 in the prior art is very slow, it is difficult for the heat in the groove of the machine housing 6 to dissipate, resulting in too high a temperature. Moreover, the area of the machine housing 6 in contact with the air is fixed and difficult to increase, while the box body 71 can increase the area in contact with the air to improve the heat dissipation efficiency. Therefore, transferring the heat to the box body 71 through the liquid and then dissipating the heat is faster than dissipating the heat only by the surface of the machine housing 6.

[0049] Preferably, a connection through-hole 711 is formed on the first end face 710, and the connection through-hole 711 connects the first cavity 701 and the second cavity 702.

[0050] The second is to dissipate heat by a radiator (not shown in the figure), that is, the liquid enters the second cavity 702 to exchange heat and absorb heat with the machine housing 6 after passing through or not passing through the first cavity 701 from the water inlet 73, and then, driven by the rotating blade 22, the liquid flows into the inner cavity 703 of the pipe body. After passing through the inner cavity 703 of the pipe body, the liquid passes through the first cavity 701 (as Figure 11 shown) or does not pass through the first cavity 701 (as Figure 12 shown), and finally flows out of the water tank 71 from the first cavity 701, passes through or does not pass through and enters the radiator. The radiator exchanges heat with the air to conduct the heat into the air and cools the liquid. After the liquid is cooled, it returns to the water inlet 73 to complete the cycle. It should be noted that the radiator is a radiator of the prior art, and for example, a finned-tube heat exchanger can be used as the radiator.

[0051] Among them, when the first cavity 701 is not needed, the first cavity 701 can be omitted. The water inlet 73 communicates with the second cavity 702, and the water outlet 74 communicates with the inner cavity 703 of the pipe body. At this time, there is no inner cavity inside the box body 71, but an inner cavity is jointly formed with the machine housing 6. Preferably, the water inlet 73 is opened on the first end face 710, and the water inlet 73 is the end of the pipe body 72 away from the water circulation device.

[0052] The heat dissipation area of this method is larger than that relying only on the box body 71, and the heat dissipation effect is better, but the occupied volume is larger.

[0053] The third is combined heat dissipation, that is, the first and second heat dissipation methods are used simultaneously. As Figure 6 shown, the water inlet 73 and the water outlet 74 corresponding to the first cavity 701 are respectively connected to a radiator (not shown in the figure).

[0054] Furthermore, a third heat sink is formed on the outer side of the box body 71, and the third heat sink is used to increase the heat exchange area with air and accelerate the heat dissipation speed.

[0055] Furthermore, the blades 22 are arranged in a uniform circular distribution.

[0056] Furthermore, the N poles and S poles of the first permanent magnet 1 are arranged in a uniform circular alternating pattern, so as to match the second permanent magnet 91 with N poles and S poles arranged in a uniform circular alternating pattern in the existing technology pump head 9. The number of pole pairs of the first permanent magnet 1 is the same as that of the second permanent magnet 91.

[0057] Furthermore, the water tank 7 is formed with a second fixing through hole 712, and the screw passes through the second fixing through hole 712 and is threadedly connected to the machine shell 6 to fix the water tank 7 and the machine shell 6.

[0058] The passive liquid cooling heat dissipation device can be installed in a vertical magnetic levitation pump as Figures 3 to 6 shown, or can also be installed in a horizontal magnetic levitation pump as Figures 7 to 12 shown.

[0059] Furthermore, the machine shell 6 of the magnetic levitation pump is fixedly connected to the end cover 8 of the magnetic levitation motor, and the pump head 9 is inserted into the end cover 8. A protrusion 62 is formed at the end of the machine shell 6 away from the pump head 9, and a flow channel groove 621 is formed between the protrusions 62. The protrusion 62 increases the heat exchange area, and the flow channel groove 621 increases the flow distance during liquid heat exchange, so that more heat is exchanged between the machine shell 6 and the liquid.

[0060] It should be noted that some internal components of the pump head 9 and the internal components of the magnetic levitation motor are not shown in the figure and are all prior arts.

[0061] During installation, first fix the base 31 to the bottom surface (end surface) of the first groove 63 of the machine shell 6, and then insert the pipe body 72 into the first groove 63, as Figure 6 and Figure 11 shown. Finally, fixedly connect and seal the ends of the box body 71 and the machine shell 6 away from the pump head 9.

[0062] When a radiator needs to be used, connect the inlet and outlet of the radiator to the water outlet 74 and the water inlet 73 of the water tank 7 respectively.

[0063] It should be noted that some internal components of the pump head 9 and the internal components of the magnetic levitation motor are not shown in the figure and are all prior arts. Among them, the end of the housing 6 is fixedly connected to the end cover 8 of the magnetic levitation motor, and the pump head 9 is inserted into the end cover 8 and fixed.

[0064] The present utility model has been described by way of example above, but the present utility model is not limited to the above specific embodiments, and any modification or variation based on the present utility model falls within the scope of protection required by the present utility model.

Claims

1. A passive liquid cooling device for a magnetic levitation pump, characterized in that: include: A water circulation device and a water tank (7), the water circulation device comprising a first permanent magnet (1), a rotor (2) and a mounting frame (3), the first permanent magnet (1) rotating relative to the mounting frame (3), the rotor (2) being fixedly connected to the first permanent magnet (1), the rotor (2) comprising blades (22), the N poles and S poles of the first permanent magnet (1) being arranged alternately in a circle, and the blades (22) being used to drive the flow of liquid in the water tank (7).

2. The passive liquid cooling device for a magnetic suspension pump according to claim 1, characterized in that: The mounting frame (3) comprises a base (31) and a fixed shaft (32); the first permanent magnet (1) rotates around the fixed shaft (32); and the base (31) and the end of the fixed shaft (32) are integrally formed.

3. The passive liquid cooling device for a magnetic suspension pump according to claim 2 is characterized in that: The rotor (2) further comprises a cylinder (21), the first permanent magnet (1) being inserted into the cylinder (21) and fixedly connected to the cylinder (21), and the cylinder (21) being fixedly connected to a plurality of blades (22).

4. The passive liquid cooling device for a magnetic suspension pump according to claim 3 is characterized in that: The water circulation device further comprises a bearing (4), the bearing (4) being located inside the cylinder (21) and sleeved on the outside of the fixed shaft (32), the inner ring and the outer ring of the bearing (4) being fixedly connected to the fixed shaft (32) and the cylinder (21) respectively.

5. The passive liquid cooling device for a magnetic suspension pump according to claim 4 is characterized in that: The water circulation device further comprises a limit block (5), wherein the limit block (5) is fixedly connected to the fixed shaft (32), the fixed shaft (32) forms a limit surface (321), and the limit block (5) and the limit surface (321) are in contact with two ends of the bearing (4) respectively.

6. The passive liquid cooling device for a magnetic suspension pump according to claim 1, characterized in that: The water tank (7) comprises a box body (71) and a tube body (72); the box body (71) and the tube body (72) are fixedly connected; a second cavity (702) is formed on a side of a first end surface (710) of the box body (71) close to the tube body (72); a tube body inner cavity (703) is formed inside the tube body (72); the second cavity (702) and the tube body inner cavity (703) are connected at a water circulation device; the water circulation device is located at an end of the tube body (72) away from the box body (71).

7. The passive liquid cooling device for a magnetic suspension pump according to claim 6, characterized in that: It also includes a radiator, the water tank (7) is formed with a water inlet (73) and a water outlet (74), and the radiator is respectively connected to the water inlet (73) and the water outlet (74).

8. The passive liquid cooling device for a magnetic suspension pump according to claim 6, characterized in that: A first cavity (701) is formed inside the box body (71), and a connecting through hole (711) is formed on the first end surface (710), wherein the connecting through hole (711) connects the first cavity (701) and the second cavity (702).

9. The passive liquid cooling device for a magnetic suspension pump according to claim 6, characterized in that: A third heat sink is formed on the outer side of the box body (71).

10. The passive liquid cooling device for a magnetic suspension pump according to claim 1, characterized in that: The blades (22) are arranged in a uniform circumferential arrangement, and the N poles and S poles of the first permanent magnet (1) are arranged in a uniform circumferential alternating arrangement.

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