A magnetically suspended shaftless hydrogen circulation pump

Abstract

The present invention relates to the technical field of circulating pumps, and in particular to a magnetic suspension shaftless hydrogen circulating pump, comprising: a housing, a high-speed motor, a magnetic suspension bearing assembly arranged inside the housing, and a rotor component arranged inside the magnetic suspension bearing assembly, wherein the magnetic suspension bearing assembly comprises two radial magnetic suspension bearings, wherein a plurality of air film assemblies are arranged inside the radial magnetic suspension bearings, wherein the plurality of air film assemblies form a ring shape inside the radial magnetic suspension bearings, and an air film is formed between the air film assembly and the radial magnetic suspension bearings; wherein the air film assembly comprises an arc block, wherein a mounting cavity is provided on a side of the arc block away from the radial magnetic suspension bearings, wherein an air film regulating assembly is arranged inside the mounting cavity, and wherein the air film regulating assembly comprises an regulating column and a guide plate. The present invention can quickly adjust the thickness of the air film, reduce the swing degree of the rotor component, and ensure the normal use of the circulating pump.

Description

Technical Field

[0001] The invention relates to the technical field of circulating pumps, and in particular to a magnetically suspended shaftless hydrogen circulating pump. Background Art

[0002] The magnetic levitation shaftless hydrogen circulation pump eliminates friction loss through magnetic levitation technology, achieves zero leakage through shaftless design, and ensures ultra-stable operation through intelligent control. It perfectly solves the high risk and precision transmission requirements of hydrogen media, and is widely used in hydrogen fuel cell systems, liquid hydrogen storage and transportation, aerospace and other fields.

[0003] The Chinese patent with patent number 202111039535.6 discloses a hydrogen circulation pump, including a pump casing and a rotating assembly located inside the pump casing, the pump casing is composed of a cooling casing and a volute, the cooling casing and the volute together constitute an inner cavity for accommodating the rotating assembly and sealed from the outside, the cooling casing and the volute are in gas communication, the rotating assembly includes a rotor shaft and an impeller, the rotating assembly forms a suspension support with the pump casing through a magnetic bearing; when working, the inner cavity is filled with a working medium, and the rotating assembly is suspended in the working medium. The above invention has the advantages of simple structure, hydrogen sealing, and the ability to increase the rotor shaft speed to ensure the hydrogen pressurization function, thereby achieving miniaturization.

[0004] However, during the use of the above-mentioned circulation pump, since the temperature of hydrogen changes due to compression, friction or external heat source during the circulation process, the density decreases as the temperature increases, resulting in the change of hydrogen density and causing the rotor to become unstable, thereby affecting the use efficiency of the circulation pump. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a magnetically suspended shaftless hydrogen circulation pump.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A magnetic suspension shaftless hydrogen circulation pump, comprising: a housing, a high-speed motor, a magnetic suspension bearing assembly arranged inside the housing, and a rotor component arranged inside the magnetic suspension bearing assembly, wherein the magnetic suspension bearing assembly comprises two radial magnetic suspension bearings, a plurality of air film assemblies are arranged inside the radial magnetic suspension bearings, the plurality of air film assemblies form a ring inside the radial magnetic suspension bearings, and an air film is formed between the air film assembly and the rotor component;

[0008] The air film assembly includes an arc block, a mounting cavity is provided on a side of the arc block away from the radial magnetic bearing, an air film adjustment assembly is arranged inside the mounting cavity, and the air film adjustment assembly includes an adjustment column and a guide plate, the adjustment column is fixedly connected to the top wall of the mounting cavity, the guide plate is fixedly connected to the end of the adjustment column, and the guide plate faces the opening position of the mounting cavity, and is used to adjust the thickness of the air film;

[0009] A control component is arranged on one side of the guide plate away from the adjusting column, and the control component is used to control the extension and retraction of the adjusting column.

[0010] Preferably, the magnetic bearing assembly further comprises two sensor rings and an axial magnetic bearing, wherein the axial magnetic bearing is arranged at the rear end of the housing, and the two sensor rings are respectively arranged on the sides of two radial magnetic bearings for detecting the position of the rotor component.

[0011] Preferably, the radial magnetic bearing includes two mounting rings of different diameters, a plurality of mounting columns and a plurality of first energized spiral wires, the two mounting rings are concentrically arranged, the plurality of mounting columns are evenly arranged between the two mounting rings and are connected to the two mounting rings, and the plurality of first energized spiral wires are respectively wound around the outer walls of the plurality of mounting columns to form a magnetic field, thereby forming a magnetic suspension support for the rotor component.

[0012] Preferably, the rotor component includes two protective bearings, a rotor shaft and an impeller, the two protective bearings are both sleeved on the rotor shaft, and the two protective bearings are respectively arranged at both ends of the magnetic bearing assembly, and the impeller is fixedly connected to the end of the rotor shaft to drive the hydrogen transfer.

[0013] Preferably, the air film assembly also includes two limit blocks, which are fixedly connected to both sides of the arc block. The cross-sections of the two limit blocks are triangular, and the tips are close to each other. An inward depression is formed between the two limit blocks and the arc block, and the depression is used to form an air film.

[0014] Preferably, the adjustment column includes a supporting outer tube, a second energized spiral wire and a power connection module, the supporting outer tube is fixedly connected between the top wall of the installation cavity and the guide plate, the second energized spiral wire is arranged inside the supporting outer tube, and the power connection module is fixedly connected to the inner side of the radial magnetic bearing.

[0015] Preferably, the side of the installation cavity is set to be arc-shaped, and the top is set to be spherical; the two sides of the adjustment column are set to be arc-shaped, and the middle is set to be a folded section; the outer side of the guide plate is set to be an arc-shaped side inclined toward the adjustment column, and is made of elastic material.

[0016] Preferably, the control assembly includes a piezoelectric ceramic sheet and a control module, the piezoelectric ceramic sheet is fixedly connected to a side of the guide plate away from the adjustment column, and the control module is arranged between the piezoelectric ceramic sheet and the guide plate for outputting signals.

[0017] Preferably, the surface of the piezoelectric ceramic sheet is configured to be conical, and the diameter of the piezoelectric ceramic sheet is smaller than the diameter of the opening position of the installation cavity.

[0018] Preferably, the arc block and the limit block are both made of non-magnetic material, which does not affect the interaction between magnetic fields and is used to ensure the use of the magnetic field of the radial magnetic bearing.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When the rotor component loses stability, it will cause the force of the air film to be unbalanced, squeezing the control component. At this time, the control component will control the adjustment column to expand and contract, driving the guide plate to separate from the opening of the installation cavity, and the air film will be supplemented and adjusted through the gas inside the installation cavity, so as to quickly adjust the thickness of the air film, reduce the swing degree of the rotor component, and ensure the normal use of the circulation pump;

[0021] 2. Radial and axial magnetic bearings are responsible for radial stability and axial balance in the magnetic suspension shaftless hydrogen circulation pump. The two work together to ensure reliable suspension and efficient operation of the rotor under high speed, high pressure and extreme temperature through high-precision sensor rings.

[0022] 3. By setting stoppers on both sides of the arc block, the inward depression can be blocked and squeezed on both sides after the gas film is squeezed, thereby reducing the amount of gas overflowing from both sides, ensuring the uniformity of the gas film, and reducing the tilting effect of the rotor shaft caused by the hydrogen density;

[0023] 4. After the second energized spiral wire is energized, it will shrink, thereby driving the guide plate to move into the installation cavity, and the hydrogen medium in the installation cavity is discharged from the installation cavity to replenish the lost air film, so that the air film can be quickly restored to avoid the deflection of the rotor shaft. At the same time, after the second energized spiral wire is energized, a magnetic field will be formed at both ends of the second energized spiral wire. The rotor shaft is adjusted through the magnetic poles at both ends of the second energized spiral wire, thereby accelerating the resetting of the rotor shaft, realizing precise control of the rotor shaft, and controlling the rotor offset within ±2μm;

[0024] 5. The piezoelectric ceramic piece is arranged on the surface of the guide plate and is in direct contact with the air film. The micron-level displacement is controlled by voltage to adjust the thickness of the air film in real time. When the surface pressure of the piezoelectric ceramic piece changes due to the change of the air film, the piezoelectric ceramic piece generates electricity, which is transmitted to the internal control module. The control module transmits a signal to simultaneously open and close the second energized spiral power supply, thereby realizing precise adjustment and control of the air film and ensuring rapid adjustment of the rotor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front structural schematic diagram of a magnetically suspended shaftless hydrogen circulation pump proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a magnetically suspended shaftless hydrogen circulation pump proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of a magnetically suspended shaftless hydrogen circulation pump proposed by the present invention;

[0028] Figure 4 This is a schematic diagram of the exploded structure of a magnetic suspension bearing assembly of a magnetic suspension shaftless hydrogen circulation pump proposed by the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the rotor component of a magnetically suspended shaftless hydrogen circulation pump proposed by the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of a radial magnetic bearing of a magnetic suspension shaftless hydrogen circulation pump proposed by the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of an air membrane component of a magnetically suspended shaftless hydrogen circulation pump proposed by the present invention;

[0032] Figure 8 This is a schematic diagram of the internal structure of the arc block of a magnetic suspension shaftless hydrogen circulation pump proposed by the present invention;

[0033] Fig. 9 This is a schematic structural diagram of an air film regulating component of a magnetically suspended shaftless hydrogen circulation pump proposed by the present invention;

[0034] Fig.10 This is a schematic diagram of the control component structure of a magnetically suspended shaftless hydrogen circulation pump proposed by the present invention.

[0035] In the figure: 1. casing; 2. high-speed motor; 3. magnetic bearing assembly; 31. radial magnetic bearing; 311. mounting ring; 312. mounting column; 313. first energized spiral wire; 32. sensor ring; 33. axial magnetic bearing; 4. rotor component; 41. protective bearing; 42. rotor shaft; 43. impeller; 5. air film assembly; 51. arc block; 52. limit block; 6. air film adjustment assembly; 61. adjustment column; 611. supporting outer tube; 612. second energized spiral wire; 613. power connection module; 62. guide plate; 7. control assembly; 71. piezoelectric ceramic sheet; 72. control module. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] The terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present invention are only for the convenience of description and are not used to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of the present invention without substantially changing the technical content.

[0038] Reference Figure 1-Figure 10 A magnetic suspension shaftless hydrogen circulation pump, comprising: a housing 1, a high-speed motor 2, a magnetic suspension bearing assembly 3 arranged inside the housing 1, and a rotor component 4 arranged inside the magnetic suspension bearing assembly 3, wherein the magnetic suspension bearing assembly 3 comprises two radial magnetic suspension bearings 31, a plurality of air film assemblies 5 are arranged inside the radial magnetic suspension bearing 31, and the plurality of air film assemblies 5 form a ring inside the radial magnetic suspension bearing 31, and an air film ring is formed between the air film assembly 5 and the rotor component 4;

[0039] The air film assembly 5 includes an arc block 51, and a mounting cavity is opened on a side of the arc block 51 away from the radial magnetic bearing 31. An air film adjustment assembly 6 is arranged inside the mounting cavity. The air film adjustment assembly 6 is arranged inside the mounting cavity. The air film adjustment assembly 6 includes an adjustment column 61 and a guide plate 62. The adjustment column 61 is fixedly connected to the top wall of the mounting cavity, and the guide plate 62 is fixedly connected to the end of the adjustment column 61, and the guide plate 62 faces the opening position of the mounting cavity, which is used to adjust the thickness of the air film;

[0040] A control component 7 is disposed on a side of the guide plate 62 away from the adjustment column 61 , and the control component 7 is used to control the extension and retraction of the adjustment column 61 .

[0041] In the embodiment of the application of the above technical solution, when the rotor component 4 rotates at a high speed inside the magnetic bearing assembly 3, the hydrogen medium inside will be brought into the narrow gap between the rotor component 4 and the magnetic bearing assembly 3 due to the viscosity, forming an air film with pressure distribution. When the hydrogen seal changes during the operation of the hydrogen pump, the rotor component 4 will become unstable and deviate, affecting the circulation efficiency of the hydrogen.

[0042] Before operation, the installation cavity is filled with hydrogen medium. When the rotor is working, suction is generated to move the guide plate 62 to seal the installation cavity. When the rotor component 4 becomes unstable, the force on the air film is unbalanced, squeezing the control component 7. At this time, the control component 7 controls the adjustment column 61 to extend and retract, driving the guide plate 62 to separate from the opening of the installation cavity. The air film is supplemented and adjusted by the gas inside the installation cavity, thereby quickly adjusting the thickness of the air film, reducing the swing degree of the rotor component 4, and ensuring the normal use of the circulation pump.

[0043] The preferred technical solution in this embodiment is:

[0044] Reference Figure 2-4 The magnetic bearing assembly 3 further includes two sensor rings 32 and an axial magnetic bearing 33. The axial magnetic bearing 33 is arranged at the rear end of the housing 1. The two sensor rings 32 are respectively arranged on the sides of the two radial magnetic bearings 31 to detect the position of the rotor component 4.

[0045] The radial magnetic bearing 31 includes two mounting rings 311, a plurality of mounting columns 312 and a plurality of first energized spiral wires 313. The two mounting rings 311 of different diameters are concentrically arranged. The plurality of mounting columns 312 are evenly arranged between the two mounting rings 311 and are connected to the two mounting rings 311. The plurality of first energized spiral wires 313 are respectively wound around the outer walls of the plurality of mounting columns 312 to form a magnetic field, thereby forming a magnetic suspension support for the rotor component 4.

[0046] In the magnetic bearing assembly 3, two radial magnetic bearings 31 are used to control the radial position of the rotor perpendicular to the axial direction to prevent it from being offset due to gravity, centrifugal force or fluid disturbance, and to balance the radial load through electromagnetic force to keep the air gap between the rotor and the stator constant;

[0047] The axial magnetic bearing 33 is used to limit the axial movement of the rotor along the axis direction and offset the axial force caused by fluid pressure difference, thermal expansion or mechanical impact. In the hydrogen circulation pump, the pressure difference on both sides of the impeller 43 will produce significant axial thrust. The axial bearing needs to adjust the electromagnetic force in real time to balance this thrust.

[0048] The radial and axial magnetic bearings 33 respectively assume the core functions of radial stability and axial balance in the magnetically suspended shaftless hydrogen circulation pump. The two work together through the high-precision sensor ring 32 to ensure the reliable suspension and efficient operation of the rotor under high speed, high pressure and extreme temperature.

[0049] Reference Figure 5 The rotor component 4 includes two protective bearings 41, a rotor shaft 42 and an impeller 43. The two protective bearings 41 are both sleeved on the rotor shaft 42, and the two protective bearings 41 are respectively arranged at both ends of the magnetic bearing assembly 3. The impeller 43 is fixedly connected to the end of the rotor shaft 42 to drive the hydrogen to transfer.

[0050] The protective bearing 41 can play a temporary supporting role when the buoyancy disappears due to the start-up and shutdown of the equipment or a failure occurs, thereby protecting the safety of the equipment.

[0051] After being powered on, the high-speed motor 2 can drive the rotor shaft 42 to rotate, thereby driving the impeller 43 to rotate, and the hydrogen is compressed and discharged through the rotating impeller 43, thereby realizing the circulation of hydrogen.

[0052] Reference Figure 6-7 The air film assembly 5 also includes two limit blocks 52, which are fixedly connected to both sides of the arc block 51. The cross-sections of the two limit blocks 52 are triangular, and the tips are close to each other. An inward depression is formed between the two limit blocks 52 and the arc block 51, and the depression is used to form an air film.

[0053] When the rotor shaft 42 rotates at high speed, the gas will be brought into the narrow gap between the rotor shaft 42 and the limit block 52 due to the viscosity, forming a thin film layer with pressure distribution. This thin film layer is the air film. During the rotation of the rotor, the rotor gravity and external load are balanced by the air film pressure, while reducing friction (friction loss is reduced by more than 99%). At the same time, the damping characteristics of the air film suppress rotor vibration and prevent resonance instability.

[0054] However, when the density of the hydrogen on the impeller 43 changes due to external factors such as temperature, causing the rotor shaft 42 to shift, the gas film will be squeezed, and part of the gas medium will escape from both sides of the arc block 51, resulting in uneven distribution of the gas film, affecting the stability of the rotor shaft 42.

[0055] By setting limit blocks 52 for blocking on both sides of the arc block 51, the inward depression can be blocked and squeezed on both sides after the air film is squeezed, thereby reducing the amount of gas escaping from both sides, ensuring the uniformity of the air film, and reducing the tilting effect of the rotor shaft 42 caused by the hydrogen density.

[0056] Reference Figure 8-10The adjustment column 61 includes a supporting outer tube 611, a second energized spiral wire 612 and a power connection module 613. The supporting outer tube 611 is fixedly connected between the top wall of the installation cavity and the guide plate 62. The second energized spiral wire 612 is arranged inside the supporting outer tube 611. The power connection module 613 is fixedly connected to the inner side of the radial magnetic bearing 31.

[0057] When the rotor shaft 42 is offset, the control component 7 sends a signal to energize the second energized spiral wire 612. After the second energized spiral wire 612 is energized, it will contract, thereby driving the guide plate 62 to move into the installation cavity, and the hydrogen medium in the installation cavity is discharged from the installation cavity to replenish the lost air film, thereby quickly restoring the air film and preventing the rotor shaft 42 from deflecting.

[0058] At the same time, after the second energized spiral wire 612 is energized, a magnetic field will be formed at both ends of the second energized spiral wire 612. The rotor shaft 42 is adjusted by the magnetic poles at both ends of the second energized spiral wire 612, thereby accelerating the resetting of the rotor shaft 42, achieving precise control of the rotor shaft 42, and controlling the rotor offset within ±2μm.

[0059] Reference Figure 8 The side of the installation cavity is set to be arc-shaped, and the top is set to be spherical, the two sides of the adjustment column 61 are set to be arc-shaped, and the middle is set to be a folded section, the outer side of the guide plate 62 is set to be an arc-shaped side inclined toward the adjustment column 61, and is made of elastic material.

[0060] Before work, hydrogen will be introduced as the medium for air film forming. When hydrogen is used as a medium, it has low viscosity, which can reduce shear resistance; high thermal conductivity, which is conducive to the heat dissipation of the air film; low density; reducing the gas inertia effect and improving the dynamic response speed.

[0061] During the process of hydrogen introduction, the interior of the installation cavity will be filled with hydrogen. At the same time, the introduced gas will squeeze the guide plate 62 during the movement because the side of the installation cavity is set to an arc shape and the top is set to a sphere, so that the guide plate 62 moves toward the opening position of the installation cavity. When the rotor shaft 42 rotates, an inward suction force is generated, so that the guide plate 62 is adsorbed and fixed at the opening position of the installation cavity, thereby ensuring the formation of an air film.

[0062] When the rotor shaft 42 is slightly offset, the gas film will be squeezed, resulting in an unbalanced force on both sides of the guide plate 62, causing the guide plate 62 to move inward to discharge the hydrogen inside the installation cavity to balance the gas film.

[0063] Reference Figure 8 and Fig.10The control component 7 includes a piezoelectric ceramic sheet 71 and a control module 72. The piezoelectric ceramic sheet 71 is fixedly connected to a side of the guide plate 62 away from the adjustment column 61. The control module 72 is arranged between the piezoelectric ceramic sheet 71 and the guide plate 62 for outputting signals.

[0064] The surface of the piezoelectric ceramic piece 71 is configured to be conical, and the diameter of the piezoelectric ceramic piece 71 is smaller than the diameter of the opening of the installation cavity.

[0065] The arc block 51 and the limit block 52 are both made of non-magnetic material and do not affect the interaction between magnetic fields, and are used to ensure the use of the magnetic field of the radial magnetic bearing 31.

[0066] The piezoelectric ceramic piece 71 is arranged on the surface of the guide plate 62 and is in direct contact with the air film. The micron-level displacement is controlled by voltage to adjust the thickness of the air film in real time. When the surface pressure of the piezoelectric ceramic piece 71 changes due to the change of the air film, the piezoelectric ceramic piece 71 generates electricity, which is transmitted to the internal control module 72. The control module 72 transmits a signal to simultaneously open and close the power supply of the second energized spiral wire 612, thereby realizing precise adjustment and control of the air film and ensuring rapid adjustment of the rotor shaft 42.

[0067] Setting the surface of the piezoelectric ceramic sheet 71 to be conical can reduce the resistance of hydrogen during movement and increase the speed of air film adjustment.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A magnetically suspended shaftless hydrogen circulation pump, comprising: A housing (1), a high-speed motor (2), a magnetic suspension bearing assembly (3) arranged inside the housing (1), and a rotor component (4) arranged inside the magnetic suspension bearing assembly (3), characterized in that the magnetic suspension bearing assembly (3) comprises two radial magnetic suspension bearings (31), a plurality of air film assemblies (5) are arranged inside the radial magnetic suspension bearings (31), the plurality of air film assemblies (5) form a ring inside the radial magnetic suspension bearings (31), and an air film ring is formed between the air film assembly (5) and the rotor component (4); The air film assembly (5) comprises an arc block (51), a mounting cavity is provided on a side of the arc block (51) away from the radial magnetic bearing (31), an air film adjustment assembly (6) is arranged inside the mounting cavity, and the air film adjustment assembly (6) comprises an adjustment column (61) and a guide plate (62), the adjustment column (61) is fixedly connected to the top wall of the mounting cavity, the guide plate (62) is fixedly connected to the end of the adjustment column (61), and the guide plate (62) faces the opening position of the mounting cavity, and is used to adjust the thickness of the air film; A control component (7) is provided on a side of the guide plate (62) away from the adjustment column (61), and the control component (7) is used to control the extension and retraction of the adjustment column (61).

2. A magnetically suspended shaftless hydrogen circulation pump according to claim 1, characterized in that: The magnetic suspension bearing assembly (3) further comprises two sensor rings (32) and an axial magnetic suspension bearing (33), wherein the axial magnetic suspension bearing (33) is arranged at the rear end of the housing (1), and the two sensor rings (32) are respectively arranged on the sides of two radial magnetic suspension bearings (31) for detecting the position of the rotor component (4).

3. The magnetic suspension shaftless hydrogen circulation pump according to claim 1, characterized in that: The radial magnetic suspension bearing (31) comprises two mounting rings (311) of different diameters, a plurality of mounting columns (312) and a plurality of first energized spiral wires (313); the two mounting rings (311) are concentrically arranged; the plurality of mounting columns (312) are evenly arranged between the two mounting rings (311) and are all connected to the two mounting rings (311); and the plurality of first energized spiral wires (313) are respectively wound around the outer walls of the plurality of mounting columns (312) to form a magnetic field, thereby forming a magnetic suspension support for the rotor component (4).

4. The magnetic suspension shaftless hydrogen circulation pump according to claim 1, characterized in that: The rotor component (4) comprises two protective bearings (41), a rotor shaft (42) and an impeller (43); the two protective bearings (41) are sleeved on the rotor shaft (42), and the two protective bearings (41) are respectively arranged at two ends of the magnetic suspension bearing assembly (3); the impeller (43) is fixedly connected to the end of the rotor shaft (42) and is used to drive the transfer of hydrogen.

5. The magnetic suspension shaftless hydrogen circulation pump according to claim 1, characterized in that: The air film assembly (5) further comprises two limit blocks (52), the two limit blocks (52) being fixedly connected to two sides of the arc block (51), the cross-sections of the two limit blocks (52) being triangular, and the tips of the two limit blocks (52) being close to each other, and an inward depression being formed between the two limit blocks (52) and the arc block (51), and the depression being used to form an air film.

6. The magnetic suspension shaftless hydrogen circulation pump according to claim 1, characterized in that: The adjustment column (61) comprises a supporting outer tube (611), a second energized spiral wire (612) and a power connection module (613); the supporting outer tube (611) is fixedly connected between the top wall of the installation cavity and the guide plate (62); the second energized spiral wire (612) is arranged inside the supporting outer tube (611); and the power connection module (613) is fixedly connected to the inside of the radial magnetic suspension bearing (31).

7. The magnetic suspension shaftless hydrogen circulation pump according to claim 1, characterized in that: The side edges of the installation cavity are arranged in an arc shape, and the top is arranged in a spherical shape; the two sides of the adjustment column (61) are arranged in an arc shape, and the middle is arranged in a folded section; the outer side of the guide plate (62) is arranged in an arc-shaped side edge inclined towards the adjustment column (61), and is made of an elastic material.

8. The magnetic suspension shaftless hydrogen circulation pump according to claim 1, characterized in that: The control component (7) comprises a piezoelectric ceramic sheet (71) and a control module (72); the piezoelectric ceramic sheet (71) is fixedly connected to a side of the guide plate (62) away from the adjustment column (61); and the control module (72) is arranged between the piezoelectric ceramic sheet (71) and the guide plate (62) for outputting signals.

9. A magnetically suspended shaftless hydrogen circulation pump according to claim 8, characterized in that: The surface of the piezoelectric ceramic sheet (71) is arranged to be conical, and the diameter of the piezoelectric ceramic sheet (71) is smaller than the diameter of the opening position of the installation cavity.

10. The magnetic suspension shaftless hydrogen circulation pump according to claim 1, characterized in that: The arc block (51) and the limit block (52) are both made of non-magnetic material and do not affect the interaction between magnetic fields, and are used to ensure the use of the magnetic field of the radial magnetic suspension bearing (31).

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