Passive air cooling heat dissipation device for magnetic suspension pump

Abstract

The utility model relates to a passive air-cooled heat dissipation device for a magnetic suspension pump, which 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, and N poles and S poles of the first permanent magnet are alternately arranged on the circumference. The first permanent magnets are driven by the second permanent magnets, so that the blades rotate to generate airflow, the gas flow rate on the surface of the machine shell is increased, 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, the number of heat dissipation system components is reduced, and the overall size and cost of the magnetic suspension pump are further reduced; the air cooling heat dissipation device is installed in the first groove, a power source and a power system are not needed, and an existing magnetic suspension bearingless pump (magnetic suspension pump) can be matched with the air cooling heat dissipation device without structural modification.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling a magnetic suspension pump, in particular to a passive air-cooling heat dissipation device for a magnetic suspension pump. Background Art

[0002] The magnetic levitation bearingless pump (magnetic levitation pump) is a 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 levitation and rotating magnetic field through the levitation and rotating coils of the motor stator, and then to perform non-contact control of the permanent magnet rotor in the centrifugal pump (pump head) through the magnetic field. Specifically, the levitation magnetic field actively controls the radial levitation of the rotor's X and Y2 degrees of freedom, and the rotating magnetic field controls the rotor's Z-axis rotation. Finally, the passive suspension control of the remaining 3 degrees of freedom is achieved with the help of permanent magnetic force and magnetic resistance principle.

[0003] Since the magnetic levitation motor has no main shaft, it is impossible to install a cooling fan on the main shaft to cool the motor like an ordinary motor. Therefore, existing magnetic levitation motors usually use passive cooling or active cooling systems with independent power, power supply and control units.

[0004] However, passive cooling is not enough, and the installation of an additional cooling system independent of the magnetic levitation bearingless pump requires a new power supply system, power system and control system. Sensors are also required to sense the heat of the magnetic levitation motor to adjust the speed of the cooling fan. The additional components of the independent cooling system increase the overall cost and size of the magnetic levitation bearingless pump, and the increase in components also causes a decrease in reliability (for example, if the independent cooling system fails and the speed decreases or stops, the magnetic levitation motor will be damaged due to overheating). Utility Model Content

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

[0006] A passive air-cooling heat dissipation device for a magnetic levitation pump comprises: a first permanent magnet, a rotor and a mounting frame, wherein the first permanent magnet rotates relative to the mounting frame, the rotor is fixedly connected to the first permanent magnet, the rotor comprises blades, and the N poles and S poles of the first permanent magnet are arranged alternately in a circle.

[0007] Furthermore, the mounting bracket includes a fixed shaft, and the first permanent magnet rotates around the fixed shaft.

[0008] Furthermore, the mounting frame also includes a base, and the base is integrally formed with the end of the fixed shaft.

[0009] Furthermore, the rotor further comprises a cylinder, the first permanent magnet is inserted into the cylinder and fixedly connected to the cylinder, and the cylinder is fixedly connected to the plurality of blades.

[0010] Furthermore, it also includes a bearing, which is located inside the cylinder and sleeved on the outside of the fixed shaft, and the inner ring and outer ring of the bearing are fixedly connected to the fixed shaft and the cylinder respectively.

[0011] Furthermore, it also includes a limit block, which is fixedly connected to the fixed shaft, the fixed shaft forms a limit surface, and the limit block and the limit surface are in contact with two ends of the bearing respectively.

[0012] Furthermore, it also includes an air duct block, the air duct block includes an air duct tube, and the blades are used to generate gas flow between the inside of the air duct tube and the outside of the air duct tube.

[0013] Furthermore, the air duct block also includes an air duct plate, the air duct tube and the air duct plate are integrally formed, and the air duct plate is located outside the air duct tube.

[0014] Furthermore, the blades are arranged uniformly in a circle, and the N poles and S poles of the first permanent magnet are arranged uniformly in a circle alternately.

[0015] Furthermore, the base is formed with a fixing through hole, and a screw passes through the fixing through hole for fixing.

[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 airflow, which speeds up the gas flow rate on the surface of the casing. The rotation of the blades does not require additional power systems such as motors or power supply, which reduces the number of cooling system components, thereby reducing the overall volume and cost of the magnetic levitation pump;

[0018] 2. The first permanent magnet and the second permanent magnet move synchronously, so that the blades are adjusted synchronously according to the rotation speed of the second permanent magnet, thereby changing the heat dissipation speed according to the rotation speed of the second permanent magnet, and no additional sensors and control systems are needed to control the rotation speed of the blades;

[0019] 3. The air duct block and the casing form an air duct, so that the air moves in a directional manner along the air duct under the drive of the blades, so that the air in more areas of the casing is affected and flows faster;

[0020] 4. The air-cooled heat sink is installed in the first groove, and does not require a power supply or a power system. The existing magnetic levitation bearingless pump (magnetic levitation pump) can be adapted to the air-cooled heat sink without making structural changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] Figure 1 : Schematic diagram of the three-dimensional structure of the air-cooled heat dissipation device;

[0023] Figure 2 : Schematic diagram of the cross-sectional structure of the air-cooled heat dissipation device;

[0024] Figure 3 : Schematic diagram of the top view of the vertical magnetic levitation pump (the pump head is not shown);

[0025] Figure 4 : Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0026] Figure 5 : Schematic diagram of the three-dimensional structure of a vertical magnetic levitation pump (the pump head is not shown);

[0027] Figure 6 : Schematic diagram of the three-dimensional structure of the vertical magnetic levitation pump (the pump head is not shown);

[0028] Figure 7 : Schematic diagram of the three-dimensional structure of the vertical magnetic suspension pump without the air duct block (the pump head is not shown);

[0029] Figure 8 : Schematic diagram of the main structure of the horizontal magnetic levitation pump (the pump head is not shown);

[0030] Fig. 9 : Figure 8 Schematic diagram of the cross-sectional structure at the middle BB;

[0031] Fig.10 : Schematic diagram of the three-dimensional structure of a horizontal magnetic levitation pump (the pump head is not shown);

[0032] Fig.11 : Schematic diagram of the three-dimensional structure of the horizontal magnetic levitation pump without the air duct block (the pump head is not shown);

[0033] Fig.12 : Fig.11 Schematic diagram of the three-dimensional structure of the air duct block. DETAILED DESCRIPTION

[0034] The utility model is further described below with reference to the accompanying drawings and examples:

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] like Figure 1 and Figure 2 As shown, a passive air-cooling heat dissipation device for a magnetic levitation pump includes: a first permanent magnet 1, a rotor 2 and a mounting frame 3, wherein the first permanent magnet 1 rotates relative to the mounting frame 3, the rotor 2 is fixedly connected to the first permanent magnet 1, and the rotor 2 includes blades 22, the rotating blades 22 generate airflow, accelerate the gas flow on the surface of the pump head 9 and / or the housing 6 of the magnetic levitation motor, so that the heat of the magnetic levitation pump is quickly discharged with the airflow, and the magnetic levitation pump is prevented from overheating. The N pole and the S pole of the first permanent magnet 1 are arranged alternately in a circle. It should be noted that the first permanent magnet 1 can be a radially magnetized annular permanent magnet, or it can be a plurality of permanent magnets arranged in a circle. Preferably, the alternating circumferential arrangement is a uniform alternating circumferential arrangement. The number of pole pairs of the first permanent magnet 1 is consistent with the number of pole pairs of the second permanent magnet 91.

[0039] There are two driving modes for the rotation of the first permanent magnet 1. The first 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 magnetic force. At this time, the material of the air duct groove 64 needs to be non-ferromagnetic. The second 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 through the attraction of opposite poles. Figure 4 The following embodiments all adopt the second driving mode.

[0040] Furthermore, the mounting bracket 3 includes a fixed shaft 32 , and the first permanent magnet 1 rotates around the fixed shaft 32 , that is, the rotation axis of the first permanent magnet 1 and the axial direction of the fixed shaft 32 coincide with each other.

[0041] Furthermore, the mounting frame 3 further includes a base 31 , the base 31 and the end of the fixing shaft 32 are integrally formed, and the base 31 is used to be fixed to the housing 6 .

[0042] Furthermore, the rotor 2 further comprises a cylinder 21 , the first permanent magnet 1 is inserted into the cylinder 21 and fixedly connected to the cylinder 21 , the cylinder 21 provides a space for the first permanent magnet 1 to be installed and fixed, and the cylinder 21 is fixedly connected to a plurality of blades 22 .

[0043] Furthermore, it also includes a bearing 4, which is located inside the cylinder 21 and is mounted on the outside of the fixed shaft 32. The inner ring and outer ring of the bearing 4 are fixedly connected to the fixed shaft 32 and the cylinder 21 respectively. The bearing 4 is used to reduce friction resistance and also limits the first permanent magnet 1 and the cylinder 21 so that the first permanent magnet 1 and the cylinder 21 have only one degree of rotational freedom.

[0044] Furthermore, it also includes a limit block 5, the limit block 5 is fixedly connected to the fixed shaft 32, the fixed shaft 32 forms a limit surface 321, the limit block 5 and the limit surface 321 are in contact with both ends of the bearing 4 respectively, and the limit surface 321 plays a role in positioning and limiting the inner ring of the bearing 4. Preferably, the limit block 5 is threadedly connected to the fixed shaft 32.

[0045] The existing magnetic levitation motors all have a first groove 63, and the first groove 63 is located at the end of the second permanent magnet 91. The passive air-cooling heat dissipation device can be directly installed inside the first groove 63 of the existing magnetic levitation pump. During installation, the mounting frame 3 is fixedly connected to the bottom of the first groove 63, and the connection method can be threaded connection, brazing, clamping or bonding.

[0046] Furthermore, the blades 22 are arranged uniformly in a circumferential pattern, and the N poles and S poles of the first permanent magnet 1 are arranged uniformly in a circumferential pattern in an alternating pattern.

[0047] Furthermore, the base 31 is formed with a fixing through hole 311 , and a screw passes through the fixing through hole 311 for fixing.

[0048] During operation, the first permanent magnet 1 rotates synchronously with the second permanent magnet 91, and the rotating blades 22 generate airflow, which speeds up the gas exchange speed on the surface of the housing 6, thereby speeding up the heat dissipation. Since the rotation speed of the first permanent magnet 1 is the same as that of the second permanent magnet 91, the blade 22 rotates at a high speed when the second permanent magnet 91 rotates at a high speed (high heat generation of the magnetic levitation motor), and rotates at a low speed when the second permanent magnet 91 rotates at a low speed (low heat generation of the magnetic levitation motor), and the automatic adjustment of the rotation speed of the blade 22 is achieved without the need for a control system and a temperature sensor of the magnetic levitation motor.

[0049] The blades 22 rotate to accelerate the exchange of air inside the first groove 63 and the outside air, and dissipate heat out of the first groove 63, thereby reducing the temperature inside the magnetic levitation motor.

[0050] Furthermore, if Figure 4 and Fig.12 As shown, it also includes an air duct block 7, which includes an air duct cylinder 71, and the blades 22 are used to generate gas flow between the inside of the air duct cylinder 71 and the outside of the air duct cylinder 71.

[0051] During operation, an air duct tube 71 is added in the first groove 63 so that the air has an air duct, which can speed up the exchange of air inside and outside the first groove 63 and further speed up the heat dissipation.

[0052] Furthermore, the air duct block 7 further includes an air duct plate 72 , the air duct cylinder 71 and the air duct plate 72 are integrally formed, and the air duct plate 72 is located outside the air duct cylinder 71 .

[0053] When heat is dissipated by air cooling, the air duct block 7 forms an air duct so that air can flow through more areas of the casing 6, and the air duct plate 72 plays the role of fixing the casing and forming an air duct.

[0054] like Figures 1 to 12 As shown, a magnetic levitation pump includes a magnetic levitation motor and a pump head 9, wherein the magnetic levitation motor and the pump head 9 are fixedly connected, and further includes the air-cooled heat dissipation device, wherein the second permanent magnet 91 inside the pump head 9 is coaxial with the first permanent magnet 1, and the N pole and the S pole of the second permanent magnet 91 are arranged alternately in a circle, wherein the N pole of the second permanent magnet 91 corresponds to the S pole of the first permanent magnet 1, and the S pole of the second permanent magnet 91 corresponds to the N pole of the first permanent magnet 1, and the first permanent magnet 1 and the second permanent magnet 91 are basically relatively still (there may be a slight relative movement, but the corresponding magnetic poles will not change due to rotation) through the magnetic force of oppositely attracted magnetic poles. Preferably, the alternating arrangement of the circle is a uniform alternating arrangement of the circle.

[0055] Furthermore, a first groove 63 is formed at one end of the housing 6 of the magnetic levitation motor away from the pump head 9, the air-cooling heat dissipation device is located inside the first groove 63, and the mounting frame 3 is fixedly connected to the housing 6. Preferably, the mounting frame 3 and the housing 6 can be fixedly connected by conventional fixing methods such as threaded connection, brazing, clamping, or bonding.

[0056] Furthermore, it also includes an air duct block 7, the air duct block 7 includes an air duct cylinder 71 and an air duct plate 72, the air duct cylinder 71 and the air duct plate 72 are integrally formed, the air duct block 7 is inserted into the first groove 63, there is a first gap between the end of the air duct cylinder 71 and the bottom of the first groove 63, there is a second gap between the side of the air duct cylinder 71 and the side wall of the first groove 63, the air duct plate 72 is fixedly connected to the housing 6, the air duct plate 72 and the end of the housing 6 away from the pump head 9 form a third gap, the two ends of the second gap are respectively connected to the first gap and the third gap, a plurality of first heat sinks 61 are formed on the side of the housing 6, and the third gap is connected to the gap between the first heat sinks 61. The air duct block 7 allows the airflow flowing through the surface of the housing 6 to form an air duct, so that the air moves in a directional manner and the heat dissipation efficiency is accelerated.

[0057] The direction of the airflow is from the gap between the first heat sink fins 61 through the third gap, the second gap and the first gap in sequence, and is sucked in from the side by the rotor 2 and then discharged from the axial direction. The airflow passes through the air duct cylinder 71 and is discharged outward.

[0058] Furthermore, if Figures 3 to 7 As shown, the end of the housing 6 away from the pump head 9 is the bottom and is formed with a base 62, the air duct plate 72 is fixedly connected to the base 62, the base 62 is formed with a first through hole 621, the first through hole 621 is connected to the gap between the first heat sink 61, and the first through hole 621 is connected to the third gap;

[0059] A plurality of legs 622 are formed below the base 62 , and a fourth gap exists between the legs 622 . The fourth gap is connected to the inside of the air duct tube 71 .

[0060] The above vertical magnetic levitation pump has the following airflow direction: Figure 4 As shown by the hollow arrow in the figure. Under the suction of the rotating blades 22, the air enters the gap between the first heat sink 61 from the side or the top, then passes downward through the first through hole 621, and then passes through the third gap between the air duct plate 72 and the base 62 and moves upward, and the air passes through the second gap from bottom to top. After passing through the first gap, the air moves downward through the inside of the air duct cylinder 71, and finally is discharged horizontally outward from the gap between the legs 622.

[0061] Furthermore, if Figures 8 to 12As shown, an air duct groove 64 is formed at one end of the casing 6 away from the pump head 9, and the air duct groove 64 and the air duct plate 72 constitute a third gap. The air duct block 7 also includes a wind shield 73, and the wind shield 73 is integrally formed with the air duct plate 72, and the wind shield 73 contacts the outer end of the first heat sink 61.

[0062] The above-mentioned horizontal magnetic levitation pump has the following airflow direction: Fig. 9 As shown by the hollow arrow in FIG. 2 . Under the suction of the rotating blades 22, the air enters the gap between the first heat sink 61 from the side or end, and then enters the air duct groove 64 from the inner side of the wind shield 73, and the air enters the first groove 63 along the air duct groove 64. After passing through the blades 22, the air leaves the air duct cylinder 71 outward along the air duct cylinder 71.

[0063] Furthermore, a second heat sink 631 is formed on the inner side of the side wall of the first groove 63 to further increase the heat dissipation area of ​​the housing 6 .

[0064] It should be noted that some internal components of the pump head 9 and the internal components of the magnetic suspension motor are not shown in the figure and are all prior art. Among them, the end of the housing 6 is fixedly connected to the end cover 8 of the magnetic suspension motor, and the pump head 9 is inserted into the end cover 8 and fixed.

[0065] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A passive air-cooling heat dissipation device for a magnetic levitation pump, characterized in that: include: A first permanent magnet (1), a rotor (2) and a mounting frame (3), wherein the first permanent magnet (1) rotates relative to the mounting frame (3), the rotor (2) is fixedly connected to the first permanent magnet (1), the rotor (2) comprises blades (22), and the N poles and S poles of the first permanent magnet (1) are arranged alternately in a circle.

2. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 1, characterized in that: The mounting frame (3) comprises a fixed shaft (32), and the first permanent magnet (1) rotates around the fixed shaft (32).

3. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 2, characterized in that: The mounting frame (3) further comprises a base (31), wherein the base (31) and the end of the fixed shaft (32) are integrally formed.

4. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 2, 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).

5. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 4, characterized in that: It also includes 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 outer ring of the bearing (4) being fixedly connected to the fixed shaft (32) and the cylinder (21) respectively.

6. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 5, characterized in that: It also comprises a limit block (5), the limit block (5) being fixedly connected to the fixed shaft (32), the fixed shaft (32) forming a limit surface (321), and the limit block (5) and the limit surface (321) respectively contacting two ends of the bearing (4).

7. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 1, characterized in that: It also comprises an air duct block (7), wherein the air duct block (7) comprises an air duct cylinder (71), and the blades (22) are used to generate gas flow between the inside of the air duct cylinder (71) and the outside of the air duct cylinder (71).

8. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 7, characterized in that: The air duct block (7) further comprises an air duct plate (72); the air duct cylinder (71) and the air duct plate (72) are integrally formed; and the air duct plate (72) is located outside the air duct cylinder (71).

9. The passive air-cooling heat dissipation 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.

10. The passive air-cooling heat dissipation device for a magnetic suspension pump according to claim 3, characterized in that: The base (31) is formed with a fixing through hole (311), and a screw passes through the fixing through hole (311) for fixing.

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