Magnetic suspension blower and magnetic suspension compressor

Abstract

The utility model provides a magnetic suspension air blower and a magnetic suspension compressor, the magnetic suspension air blower comprises a casing, a rotating shaft and an axial magnetic suspension bearing, an air inlet is arranged on the casing, and a heat dissipation flow channel communicated with the air inlet is arranged in the casing; the axial magnetic suspension bearing comprises a first axial stator, a second axial stator and a thrust disc, the thrust disc is located between the first axial stator and the second axial stator, and the thrust disc is fixedly arranged on the rotating shaft in a sleeving mode; an air outlet cavity is formed in the shell on the radial outer side of the thrust disc, and the shell is provided with a first air outlet communicated with the air outlet cavity, so that the air outlet cavity discharges air through the first air outlet; and the heat dissipation flow channel is used for introducing air of the air inlet and enabling the air flow to enter the air outlet cavity through the thrust disc. According to the technical scheme, the air outlet cavity is formed in the radial outer side of the thrust disc, so that air flowing through the thrust disc can flow into the air outlet cavity in time and then is exhausted from the first air outlet, the cooling effect of the thrust disc is improved, the temperature of the whole machine is reduced, and the energy efficiency ratio of the whole machine is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic suspension blowers, and in particular relates to a magnetic suspension blower and a magnetic suspension compressor. Background Art

[0002] Magnetic levitation blowers generate significant heat during operation. Excessive heat can cause motor malfunctions. When the motor is shut down, the cooling impeller fails to function properly, causing the motor to rapidly heat up, impacting its service life. Therefore, heat dissipation design is essential. Existing magnetic levitation blowers primarily use air cooling and water cooling. These utilize a series single-channel structure, where the cooling air absorbs heat as it passes through the axial stator windings, increasing the cooling air temperature. However, the thrust plate in existing magnetic levitation blowers exhibits poor cooling performance, requiring improvement. Utility Model Content

[0003] Therefore, the utility model provides a magnetic levitation blower and a magnetic levitation compressor, which can solve the technical problem of high temperature at the thrust plate of the magnetic levitation blower in the prior art.

[0004] In order to solve the above problems, the utility model provides a magnetic levitation blower, which includes a casing, a rotating shaft, a blower impeller, a motor assembly and an axial magnetic levitation bearing, wherein the casing is provided with an air inlet, and the interior of the casing has a heat dissipation flow channel connected to the air inlet; the air inlet includes an air blast port, the motor assembly is used to drive the rotating shaft to rotate, so that the rotating shaft drives the blower impeller to rotate, and the blower impeller drives air flow to enter the air from the air blast port; the axial magnetic levitation bearing includes a first axial stator, a second axial stator and a thrust plate, the thrust plate is located between the first axial stator and the second axial stator, and the thrust plate is sleeved on the rotating shaft;

[0005] An air outlet cavity is formed inside the housing on the radially outer side of the thrust plate, and the housing has a first air outlet connected to the air outlet cavity, so that the air outlet cavity discharges air through the first air outlet;

[0006] The heat dissipation channel is connected to both the air inlet and the air outlet cavity, and is used to introduce wind from the air inlet and allow the wind to flow through the thrust plate into the air outlet cavity.

[0007] In some embodiments, the first axial stator includes a first stator seat and a first annular flange provided on the first stator seat, wherein the first annular flange extends radially along the rotating shaft; the second axial stator includes a second stator seat and a second annular flange provided on the second stator seat, wherein the second annular flange extends radially along the rotating shaft;

[0008] The thrust plate is arranged between the first stator seat and the second stator seat; the first annular flange and the second annular flange are opposite to each other, and the space therebetween constitutes at least a part of the air outlet cavity.

[0009] In some embodiments, the first annular flange is located on a side of the first stator seat facing away from the second axial stator, and a first annular groove is formed between the first annular flange and the first stator seat;

[0010] And / or, the second annular flange is located on a side of the second stator seat facing away from the first axial stator, and a second annular groove is formed between the second annular flange and the second stator seat.

[0011] In some embodiments, the outer circumferential surface of the first annular flange and / or the outer circumferential surface of the second annular flange are in sealing cooperation with the inner wall of the casing.

[0012] In some embodiments, the inner wall of the casing has a cavity wall area, which constitutes a part of the cavity wall of the air outlet cavity, and the first air outlet passes through the cavity wall area to the outer wall of the casing to connect the first air outlet with the air outlet cavity.

[0013] In some embodiments, the housing is further provided with a through hole connected to the interior, and the rotating shaft is rotatably engaged with the through hole; the gap between the rotating shaft and the through hole forms an air inlet channel, and the air inlet also includes the air inlet channel.

[0014] In some embodiments, the first axial stator is closer to the through hole than the second axial stator, a first gap is defined between the thrust plate and the first axial stator, and the first gap is in communication with the air outlet cavity;

[0015] The heat dissipation channel includes a first heat dissipation channel, which is connected to the air inlet channel through the first heat dissipation channel. The first heat dissipation channel is used to guide the wind in the air inlet channel to the first gap, so that the wind flows through the thrust plate through the first gap and enters the air outlet cavity.

[0016] In some embodiments, the rotating shaft has a first section, a second section, and a third section connected in sequence along the axial direction, the rotating shaft is rotatably engaged with the through-hole through the first section, and the rotating shaft is sleeved on the axial magnetic bearing through the third section; the second section is sleeved with a bearing seat and a first radial magnetic bearing in sequence along the axial direction, and the first radial magnetic bearing is close to the axial magnetic bearing relative to the bearing seat;

[0017] The first heat dissipation channel is used to allow the wind flowing out of the air inlet channel to flow through the bearing seat and the first radial magnetic bearing in sequence, and then flow to the first gap.

[0018] In some embodiments, the radius of the widest part of the via hole is Rx, and the radius of the tuyere is R, wherein 0.21≤Rx / R≤0.22.

[0019] In some embodiments, the second axial stator is closer to the blast port than the first axial stator, a second gap is defined between the thrust plate and the second axial stator, and the second gap is in communication with the air outlet cavity;

[0020] The heat dissipation channel includes a second heat dissipation channel, which is connected to the air blast port through the second heat dissipation channel. The second heat dissipation channel is used to guide the wind from the air blast port to the second gap, so that the wind flows through the thrust plate through the second gap and enters the air outlet cavity.

[0021] In some embodiments, the second heat dissipation channel is further used to allow air to flow through the motor assembly to dissipate heat from the motor assembly;

[0022] In which, the magnetic levitation blower also includes an air outlet channel, and the casing also has a second air outlet connected to the air outlet channel. The air outlet channel is used to introduce a part of the wind flowing through the motor assembly in the second heat dissipation channel, so that the wind dissipates the heat to the motor assembly and is discharged through the second air outlet.

[0023] In some embodiments, a heat dissipation sleeve is provided between the motor assembly and the inner wall of the housing, and the heat dissipation sleeve is used to dissipate heat from the motor assembly;

[0024] The heat dissipation sleeve has heat dissipation holes inside, and the heat dissipation holes constitute a part of the air outlet flow channel, so that the air outlet flow channel dissipates heat to the motor component through the heat dissipation sleeve.

[0025] In some embodiments, the motor assembly includes a stator and a rotor, the rotor is fixedly connected to the rotating shaft, and the stator is used to drive the rotating shaft to rotate by driving the rotor; a gap between the stator and the rotor forms an air passage, and the air passage constitutes a part of the second heat dissipation flow channel, and the second heat dissipation flow channel allows air to flow through the motor assembly through the air passage;

[0026] The motor assembly is located between the second axial stator and the blower impeller. A second air gap is defined between the end of the stator facing away from the blower impeller and the second axial stator. The air outlet channel is connected to the second heat dissipation channel at the second air gap.

[0027] In some embodiments, when a heat dissipation sleeve is provided between the motor assembly and the inner wall of the housing, the motor assembly is sleeved in the heat dissipation sleeve via the stator, the heat dissipation sleeve is located between the second axial stator and the blower impeller, the heat dissipation sleeve has a second side and a third side opposite to each other in the axial direction, the second side is closer to the second axial stator relative to the third side, and the heat dissipation hole has a first opening on the second side;

[0028] There is a gap between the second side and the second axial stator, so that the air outlet channel is connected to the second air outlet gap through the first opening.

[0029] In some embodiments, the heat dissipation hole is a blind hole extending from the second side to the third side, an air outlet connected to the heat dissipation hole is provided on the outer wall of the heat dissipation sleeve, and the air outlet duct is connected to the second air outlet through the air outlet.

[0030] In some embodiments, when the heat dissipation channel includes a second heat dissipation channel, the motor assembly includes a stator and a rotor, the rotor is fixedly connected to the rotating shaft, and the stator is used to drive the rotating shaft to rotate by driving the rotor; the gap between the stator and the rotor forms an air passage, and the air passage constitutes a part of the second heat dissipation channel; the cross-sectional area of the air passage at its narrowest point in the cross section perpendicular to the axial direction of the rotating shaft is Sq, and the opening area of the air outlet is S; wherein, 0.12≤Sq / S≤0.21.

[0031] In some embodiments, in the axial direction along the rotating shaft, the housing has a first end and a second end opposite to each other, and the housing has a cylindrical section located between the first end and the second end, the outer radius of the cylindrical section at any point in the axial direction of the rotating shaft is Rt, and the inner radius is Rtn, 1.05≤Rt / Rtn≤1.1.

[0032] In some embodiments, the total air inlet area of the magnetic levitation blower is S 总进 The total outlet area (2) of the magnetic levitation blower is S 总出 , where 0.36≤S 总进 / S 总出 ≤0.62.

[0033] In some embodiments, the thrust plate is provided with an air hole structure running through both axial ends.

[0034] In some embodiments, when the heat dissipation channel includes a second heat dissipation channel, the motor assembly includes a stator and a rotor, the rotor is fixedly connected to the rotating shaft, and the stator is used to drive the rotating shaft to rotate by driving the rotor; the gap between the stator and the rotor forms an air passage, and the air passage constitutes a part of the second heat dissipation channel; the cross-sectional area of the air passage at the narrowest point in the cross section perpendicular to the axial direction of the rotating shaft is Sq; the total opening area of the air hole structure at either end of the axial direction of the thrust plate is St; wherein 0.6≤St / Sq≤0.8.

[0035] The utility model also provides a magnetic levitation compressor, which comprises any one of the magnetic levitation blowers described above.

[0036] In some embodiments, when the casing is further provided with a through hole communicating with the interior, and the rotating shaft is rotatably engaged with the through hole, the gap between the rotating shaft and the through hole forms an air inlet channel, and the air inlet further includes the air inlet channel, the magnetic levitation compressor further includes a volute and an impeller, the volute having a compression chamber, the impeller being rotatably disposed in the compression chamber, and the impeller being configured to compress the gas in the compression chamber when rotating; the impeller is located on a side of the casing facing away from the air blast port, the rotating shaft extends out of the through hole, and the rotating shaft is fixedly connected to the impeller so that the rotating shaft can drive the impeller to rotate;

[0037] The through hole is communicated with the compression chamber, wherein a comb tooth structure is provided on an inner wall of the through hole.

[0038] The magnetic levitation blower and magnetic levitation compressor provided by the utility model have the following beneficial effects:

[0039] 1. By setting an air outlet cavity on the radial outer side of the thrust disc, the wind flowing through the thrust disc can flow into the air outlet cavity in time and then be discharged from the first air outlet, which is beneficial to improving the cooling effect at the thrust disc, reducing the temperature of the whole machine, and improving the energy efficiency ratio of the whole machine.

[0040] 2. The air inlet channel formed between the rotating shaft and the through hole can assist the air intake and increase the air intake volume. The heat dissipation flow channel guides the wind in the air inlet channel to the thrust plate, thereby dissipating the heat of the thrust plate, which is beneficial to reducing the temperature of the thrust plate and achieving a better cooling effect of the thrust plate.

[0041] 3. Both the second heat dissipation channel and the air outlet channel can dissipate heat for the motor assembly. The second heat dissipation channel cooperates with the air outlet channel to perform secondary heat dissipation for the motor assembly, thereby improving the heat dissipation effect of the motor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. For those skilled in the art, other implementation drawings can be derived from the provided drawings without inventive effort.

[0043] Figure 1 This is an assembly structure diagram of the magnetic levitation blower of the present utility model;

[0044] Figure 2 This is a cross-sectional view of the magnetic levitation blower of the present utility model;

[0045] Figure 3 yes Figure 2 A magnified schematic diagram of point A in the middle;

[0046] Figure 4 It is a schematic diagram reflecting the air inlet channel between the rotating shaft and the via hole;

[0047] Figure 5 It is a schematic diagram reflecting the vias on the casing;

[0048] Figure 6 It is a schematic diagram reflecting the comb-tooth structure on the inner wall of the via.

[0049] The accompanying drawings are:

[0050] 1. Casing; 2. Second air outlet; 3. Blower impeller; 4. Rotating shaft; 5. Heat dissipation sleeve; 6. Motor assembly; 7. First air outlet; 8. Axial magnetic bearing; 9. Air outlet cavity; 10. Blower port; 11. Cavity wall area; 12. First radial magnetic bearing; 13. Second radial magnetic bearing; 16. Comb structure; 17. Bearing seat; 18. Current collector; 19. Air passage; 20. Support seat; 51. Heat dissipation hole; 61. Stator; 62. Rotor; 81. First axial stator; 82. Thrust plate; 83. Second axial stator; 91. First annular groove; 92. Second annular groove shaped slot; 9a, first gap; 9b, second gap; 101, first end; 102, second end; 103, cylindrical section; 160, through hole; 161, air inlet channel; 121, first radial stator; 122, first radial rotor; 131, second radial stator; 132, second radial rotor; 511, air outlet; 512, first opening; 611, stator core; 612, coil winding; 821, air outlet structure; 832, second air outlet gap; 81a, first stator seat; 81b, first annular flange; 83a, second stator seat; 83b, second annular flange. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0055] See also Figure 1-6As shown, according to an embodiment of the present invention, a magnetic levitation blower is provided, comprising a housing 1, a rotating shaft 4, a blower impeller 3, a motor assembly 6, and an axial magnetic bearing 8. The housing 1 is provided with an air inlet, and the interior of the housing 1 has a heat dissipation channel connected to the air inlet. The air inlet includes a blast port 10. The motor assembly 6 is configured to drive the rotating shaft 4 to rotate, which in turn drives the blower impeller 3 to rotate, and the blower impeller 3 drives airflow into the blast port 10.

[0056] The aforementioned axial magnetic bearing 8 includes a first axial stator 81, a second axial stator 83, and a thrust plate 82. The thrust plate 82 is located between the first axial stator 81 and the second axial stator 83. The thrust plate 82 is sleeved on the rotating shaft 4 so as to rotate together with the rotating shaft 4.

[0057] The housing 1 has an air outlet cavity 9 formed radially outward from the thrust plate 82. The housing 1 has a first air outlet 7 connected to the air outlet cavity 9, allowing air from the air outlet cavity 9 to be discharged through the first air outlet 7. The aforementioned heat dissipation channel is connected to both the air inlet and the air outlet cavity 9. The heat dissipation channel is used to draw air from the air inlet and direct it through the thrust plate 82 into the air outlet cavity 9.

[0058] In the above example, the air flowing into the air inlet can flow through the thrust plate 82 under the guidance of the heat dissipation flow channel, and then enter the air outlet cavity 9. The air in the air outlet cavity 9 is then discharged from the first air outlet 7. In particular, by providing the air outlet cavity 9 radially outside the thrust plate 82, the air flowing through the thrust plate 82 can flow into the air outlet cavity 9 in a timely manner and then be discharged from the first air outlet 7. This is conducive to improving the cooling effect at the thrust plate 82, reducing the temperature of the entire machine, and improving the energy efficiency ratio of the entire machine.

[0059] like Figure 2 As shown, the housing 11 may be provided with a collector 18 , which is trumpet-shaped, and a large opening of the collector 18 serves as the aforementioned air blast port 10 .

[0060] In order to form the aforementioned air outlet cavity 9, in some embodiments, as Figure 3 As shown, the aforementioned first axial stator 81 may include a first stator seat 81a and a first annular flange 81b provided on the first stator seat 81a, the first annular flange 81b extending radially along the rotating shaft 4. The first annular flange 81b may be integrally formed on the first stator seat 81a to improve the connection stability between the first annular flange 81b and the first stator seat 81a. The aforementioned second axial stator 83 may include a second stator seat 83a and a second annular flange 83b provided on the second stator seat 83a, the second annular flange 83b extending radially along the rotating shaft 4. The second annular flange 83b may be integrally formed on the second stator seat 83a to improve the connection stability between the second annular flange 83b and the second stator seat 83a.

[0061] The thrust plate 82 is disposed between the first stator seat 81a and the second stator seat 83a. The first annular flange 81b and the second annular flange 83b are opposite to each other, and the space between the first annular flange 81b and the second annular flange 83b constitutes at least a portion of the air outlet cavity 9.

[0062] In the above example, the wind in the air outlet chamber 9 can dissipate heat and cool down the first annular flange 81b and the second annular flange 83b, and then indirectly dissipate heat to the first axial stator 81 and the second axial stator 83 through the first annular flange 81b and the second annular flange 83b, and then indirectly dissipate heat to the thrust disk 82 through the first axial stator 81 and the second axial stator 83, which is beneficial to further improve the cooling effect of the thrust disk 82.

[0063] In some embodiments, as Figure 3 As shown, the aforementioned first annular flange 81b is located on the side of the first stator seat 81a facing away from the second axial stator 83, and a first annular groove 91 is formed between the first annular flange 81b and the first stator seat 81a. The formation of the first annular groove 91 can increase the contact and heat dissipation area between the first axial stator 81 and the air in the air outlet cavity 9, which is conducive to improving the heat dissipation effect of the first axial stator 81.

[0064] In some embodiments, as Figure 3 As shown, the aforementioned second annular flange 83b is located on the side of the second stator seat 83a facing away from the first axial stator 81, and a second annular groove 92 is formed between the second annular flange 83b and the second stator seat 83a. The formation of the second annular groove 92 can increase the contact and heat dissipation area between the second axial stator 83 and the air in the air outlet cavity 9, which is conducive to improving the heat dissipation effect of the second axial stator 83.

[0065] In some embodiments, the outer circumference of the first annular flange 81b seals against the inner wall of the housing 1 to facilitate the formation of the aforementioned air outlet cavity 9. Similarly, the outer circumference of the second annular flange 83b can also seal against the inner wall of the housing 1 to facilitate the formation of the aforementioned air outlet cavity 9.

[0066] In a specific application example, Figure 3 As shown, the first axial stator 81 is positioned relative to the second axial stator 83, away from the motor assembly 6. A bearing seat 17 is provided within the housing 1 to support the rotating shaft 4. This bearing seat 17 is secured to the inner wall of the housing 1. The bearing seat 17 is located on the side of the first axial stator 81 facing away from the second axial stator 83. The first annular flange 81b abuts against the bearing seat 17, providing a sealed fit between the bearing seat 17 and the inner wall of the housing 1.

[0067] In order to achieve the effect of the aforementioned first air outlet 7 being connected to the air outlet cavity 9, in some embodiments, as Figure 3 As shown, the inner wall of the housing 1 has a cavity wall area 11, which constitutes a portion of the cavity wall of the air outlet cavity 9. The first air outlet 7 extends from the cavity wall area 11 to the outer wall of the housing 1, so that the first air outlet 7 is connected to the air outlet cavity 9.

[0068] In a specific application example, the center line of the aforementioned first air outlet 7 passes through the center of the thrust disk 82, so that the first air outlet 7 is facing the radial direction of the thrust disk 82, which is conducive to the wind flowing through the thrust disk 82 being quickly drawn out from the first air outlet 7, and can improve the heat dissipation and cooling effect of the thrust disk 82.

[0069] In some embodiments, as Figure 2 and Figure 4 As shown, the housing 1 is further provided with a through hole 160 communicating with the interior, and the shaft 4 is rotatably engaged with the through hole 160. The gap between the shaft 4 and the through hole 160 forms an air inlet channel 161, which is also included in the air inlet.

[0070] In the above example, external air can enter the interior of the housing 1 through the air inlet duct 161. Specifically, the air can flow into the air inlet duct 161 driven by the external fan blades. The air inlet duct 161 formed between the rotating shaft 4 and the through hole 160 can assist in the air intake and increase the air intake volume. The heat dissipation flow channel guides the air from the air inlet duct 161 to the thrust plate 82, thereby dissipating heat from the thrust plate 82, which helps to reduce the temperature of the thrust plate 82 and improve the cooling effect of the thrust plate 82.

[0071] In some embodiments, as Figure 2 and Figure 3 As shown, the aforementioned first axial stator 81 is positioned closer to the through-hole 160 than the second axial stator 83. A first gap 9a is defined between the thrust plate 82 and the first axial stator 81, communicating with the air outlet cavity 9. The aforementioned heat dissipation flow path includes a first heat dissipation flow path, which communicates with the air inlet channel 161 through the first heat dissipation flow path. The first heat dissipation flow path is used to direct air from the air inlet channel 161 to the first gap 9a, allowing the air to flow through the first gap 9a, pass through the thrust plate 82, and enter the air outlet cavity 9.

[0072] In the above example, the first heat dissipation channel is provided to facilitate guiding the wind from the air inlet channel 161 to the thrust disk 82 to dissipate heat for the thrust disk 82 .

[0073] In some embodiments, the aforementioned rotating shaft 4 has a first section, a second section, and a third section connected in sequence along the axial direction. The rotating shaft 4 rotates with the through hole 160 through the first section, and the rotating shaft 4 is sleeved on the axial magnetic bearing 8 through the third section. The second section is sleeved with a bearing seat 17 and a first radial magnetic bearing 12 in sequence along the axial direction. The first radial magnetic bearing 12 is close to the axial magnetic bearing 8 relative to the bearing seat 17. Among them, the first heat dissipation flow channel is used to allow the wind flowing out of the air inlet channel 161 to flow through the bearing seat 17 and the first radial magnetic bearing 12 in sequence, and then flow to the first gap 9a.

[0074] In the above example, since the wind flowing out of the air inlet channel 161 flows through the bearing seat 17 and the first radial magnetic bearing 12 in sequence, and then flows to the first gap 9a, the above-mentioned first heat dissipation channel is a series heat dissipation channel, which can save costs while ensuring the cooling effect.

[0075] The first radial magnetic bearing 12 is used to provide radial support for the rotating shaft 4. In some embodiments, Figure 2 As shown, the first radial magnetic bearing 12 may include a first radial rotor 122 and a first radial stator 121 sleeved outside the first radial rotor 122. The first radial rotor 122 is sleeved on the rotating shaft 4. A gap channel is defined between the first radial rotor 122 and the first radial stator 121. The gap channel extends through both axial ends of the first radial magnetic bearing 12. This gap channel constitutes a portion of the aforementioned first heat dissipation channel.

[0076] In some embodiments, as Figure 2 and Figure 6 As shown, the radius of the widest part of the aforementioned through hole 160 is Rx, and the radius of the aforementioned tuyere 10 is R, wherein 0.21≤Rx / R≤0.22.

[0077] In the above example, Rx / R is between 0.21 and 0.22 because when the Rx / R ratio is too large, i.e., greater than 0.22, it could be that Rx is too large or the radius R of the tuyere 10 is too small. A large Rx reduces the efficiency of the impeller 33. A small radius R of the tuyere 10 can render the impeller 3 ineffective, resulting in a low gas flow rate entering the blower. Conversely, when the Rx / R ratio is too small, i.e., less than 0.21, when Rx is too small, the heat dissipation effect is ineffective, resulting in a low gas flow rate entering the blower. A large radius R of the tuyere 10 slows the gas flow rate and causes significant losses.

[0078] In some embodiments, as Figure 2 and Figure 3As shown, the aforementioned second axial stator 83 is positioned closer to the air blast port 10 relative to the first axial stator 81. A second gap 9b is defined between the thrust plate 82 and the second axial stator 83, which communicates with the air outlet cavity 9. The aforementioned heat dissipation flow path also includes a second heat dissipation flow path, which communicates with the air blast port 10 through the second heat dissipation flow path. The second heat dissipation flow path is used to direct air from the air blast port 10 to the second gap 9b, so that the air flows through the second gap 9b, passes through the thrust plate 82, and enters the air outlet cavity 9.

[0079] In the above example, the second heat dissipation channel is provided to facilitate guiding the wind from the air blowing port 10 to the thrust disk 82 to dissipate heat for the thrust disk 82 .

[0080] In some embodiments, as Figure 2 As shown, the housing 11 is further provided with a support base 20 for supporting the impeller 3. The support base 20 is located between the impeller 3 and the motor assembly 6. The second heat dissipation channel is configured to allow air flowing from the air blast port 10 to flow sequentially through the support base 20 and the motor assembly 6 before flowing into the second gap 9b.

[0081] In the above example, since the wind flowing out of the air blast port 10 flows through the support seat 20 and the motor assembly 6 in sequence, and then flows to the second gap 9b, the above-mentioned second heat dissipation channel is a series heat dissipation channel, which can save costs while ensuring the cooling effect.

[0082] In some embodiments, as Figure 2 As shown, the magnetic levitation blower of the present invention further includes a second radial magnetic bearing 13, which includes a second radial rotor 132 and a second radial stator 131 sleeved outside the second radial rotor 132. The second radial rotor 132 is sleeved on the rotating shaft 4. The second radial stator 131 is fixed to the support base 20. The second radial magnetic bearing 13 is used to provide radial support for the rotating shaft 4.

[0083] In some embodiments, as Figure 2 As shown, the aforementioned second heat dissipation channel is also used to allow air to flow through the motor assembly 6 to dissipate heat from the motor assembly 6. The magnetic levitation blower of the present invention also includes an air outlet channel, and the housing 1 further has a second air outlet 2 connected to the air outlet channel. The air outlet channel is used to draw in a portion of the air flowing through the motor assembly 6 in the second heat dissipation channel, dissipating the heat from the motor assembly 6 before being discharged through the second air outlet 2.

[0084] In the above example, the second heat dissipation channel and the air outlet channel can both dissipate heat for the motor assembly 6. The second heat dissipation channel cooperates with the air outlet channel to perform secondary heat dissipation for the motor assembly 6, thereby improving the heat dissipation effect of the motor assembly 6.

[0085] In order to realize the function of the aforementioned air outlet channel to dissipate heat for the motor assembly 6, in some embodiments, as Figure 2 As shown, a heat dissipation sleeve 5 is provided between the motor assembly 6 and the inner wall of the housing 1. The heat dissipation sleeve 5 is used to dissipate heat from the motor assembly 6. The heat dissipation sleeve 5 has heat dissipation holes 51 therein. The heat dissipation holes 51 constitute part of the aforementioned air outlet flow path, allowing the air outlet flow path to dissipate heat from the motor assembly 6 through the heat dissipation sleeve 5.

[0086] In the above example, by introducing the wind from the air outlet duct into the heat dissipation sleeve 5, the wind can dissipate heat and cool the heat dissipation sleeve 5 when flowing through the heat dissipation sleeve 5, and then indirectly dissipate heat to the motor assembly 6 through the heat dissipation sleeve 5, so that the temperature of the motor assembly 6 is reduced.

[0087] In some embodiments, the heat dissipation sleeve 5 may be a metal sleeve, such as an aluminum sleeve, etc. The heat dissipation sleeve 5 made of metal is beneficial to heat dissipation of the motor assembly 6 .

[0088] In some embodiments, as Figure 2 As shown, the aforementioned heat dissipation holes 51 can extend along the axial direction of the rotating shaft 4 inside the heat dissipation sleeve 5 to increase the contact area between the airflow and the heat dissipation sleeve 5 and improve the heat dissipation effect.

[0089] In order to enable the air outlet channel to introduce a portion of the wind flowing through the motor assembly 6 in the second heat dissipation channel, in some embodiments, as shown in FIG. Figure 2 As shown, the aforementioned motor assembly 6 includes a stator 61 and a rotor 62. The rotor 62 is fixedly connected to the rotating shaft 4, and the stator 61 is used to drive the rotating shaft 4 to rotate by driving the rotor 62. The stator 61 includes a stator core 611 and a coil winding 612 arranged on the stator core 611. The gap between the stator 61 and the rotor 62 forms an air passage 19. The air passage 19 constitutes a part of the aforementioned second heat dissipation channel, and the second heat dissipation channel allows air to flow through the motor assembly 6 through the air passage 19. The aforementioned motor assembly 6 is located between the second axial stator 83 and the blower impeller 3, and a second air gap 832 is provided between the end of the stator 61 facing away from the blower impeller 3 and the second axial stator 83. The air outlet channel is connected to the second heat dissipation channel at the second air gap 832.

[0090] In the above example, the second heat dissipation channel introduces wind from the air blast port 10, and the wind flows through the motor assembly 6 from the above-mentioned air vent 19. After the wind flows out of the motor assembly 6 from the air vent 19, the wind enters the above-mentioned second air gap 832, and then part of the wind flows into the air outlet channel through the second air gap 832, and the other part of the wind flows into the above-mentioned second gap 9b from the gap between the second axial stator 83 and the rotating shaft 4.

[0091] In some embodiments, as Figure 2As shown, when a heat dissipation sleeve 5 is provided between the motor assembly 6 and the inner wall of the housing 1, the motor assembly 6 is sheathed within the heat dissipation sleeve 5 via the stator 61, and the heat dissipation sleeve 5 is located between the second axial stator 83 and the blower impeller 3. The heat dissipation sleeve 5 has a second side and a third side in an axial direction that are opposite to each other. The second side is closer to the second axial stator 83 than the third side. The heat dissipation hole 51 has a first opening 512 on the second side. A gap is provided between the second side and the second axial stator 83, allowing the air outlet passage to communicate with the second air outlet gap 832 through the first opening 512.

[0092] In the above example, by setting the first opening 512 on the second side of the heat dissipation hole 51, a part of the wind in the second heat dissipation channel flows into the heat dissipation hole 51 through the second air gap 832 to dissipate heat to the heat dissipation sleeve 5, and indirectly dissipate heat and cool the motor assembly 6 through the heat dissipation sleeve 5.

[0093] In some embodiments, as Figure 2 As shown, the heat dissipation hole 51 is a blind hole extending from the second side to the third side. An air outlet 511 communicating with the heat dissipation hole 51 is provided on the outer wall of the heat dissipation sleeve 5. The air outlet channel is communicated with the second air outlet 2 through the air outlet 511.

[0094] In the above example, since the heat dissipation hole 51 is a blind hole, the end of the heat dissipation hole 51 close to the third side is a closed end, for example, it can prevent the heat dissipation hole 51 and the second heat dissipation channel airflow on the side of the motor assembly 6 close to the blower impeller 3 from leaking gas.

[0095] In some embodiments, as Figure 2 As shown, when the heat dissipation channel includes a second heat dissipation channel, the motor assembly 6 includes a stator 61 and a rotor 62. The rotor 62 is fixedly connected to the rotating shaft 4, and the stator 61 is used to drive the rotating shaft 4 to rotate by driving the rotor 62. The gap between the stator 61 and the rotor 62 forms an air passage 19, which constitutes part of the second heat dissipation channel. The cross-sectional area of the air passage 19 at its narrowest point, perpendicular to the axial direction of the rotating shaft 4, is Sq, and the opening area of the air blast port is S; where 0.12≤Sq / S≤0.21.

[0096] In the above example, the cross-sectional area Sq of the narrowest part of the above-mentioned air passage 19 in the section perpendicular to the axial direction of the rotating shaft 4 is sometimes also referred to as the air gap area. In the above example, when the inlet area S is constant, when the ratio of the air gap area Sq to the opening area S of the air blast port is smaller, if Sq is smaller, the flow resistance in the air passage 19 increases, and the heat dissipation effect becomes worse. When the ratio of Sq to S is larger, if Sq is larger, that is, the gap between the stator 61 and the rotor 62 increases, resulting in a decrease in motor efficiency. Therefore, when 0.12≤Sq / S≤0.21, the motor efficiency and heat dissipation effect are optimal.

[0097] In some embodiments, as Figure 2 As shown, the housing 1 has a first end 101 and a second end 102, axially along the shaft 4, and a cylindrical section 103 located between the first end 101 and the second end 102. The cylindrical section 103 has an outer radius Rt and an inner radius Rtn at any point axially along the shaft 4. Here, 1.05 ≤ Rt / Rtn ≤ 1.1.

[0098] In the above example, by setting 1.05 ≤ Rt / Rtn ≤ 1.1, the thickness of the cylindrical section 103 can be limited, preventing the excessive thickness of the housing 1 from causing poor heat dissipation of the motor assembly 6. Since heat is transferred between the cylindrical section 103, the airflow, the motor assembly 6, and the like when dissipating heat from the motor assembly 6, an excessively thick cylindrical section 103 can result in poor airflow heat dissipation.

[0099] In some embodiments, the total air inlet area of the magnetic levitation blower of the present invention is S 总进 The total outlet area of the magnetic levitation blower of this utility model is S 总出 , where 0.36≤S 总进 / S 总出 ≤0.62.

[0100] In the above example, by making 0.36≤S 总进 / S 总出 ≤0.62, can make the heat dissipation effect of the magnetic levitation blower of the utility model better. Specifically, when the ratio of the total air inlet area to the total air outlet area is smaller, the total air inlet area is larger or the total air outlet area is smaller. According to the relationship between the inlet flow rate, the inlet area and the inlet speed, when the total air inlet area is larger, the air inlet speed is smaller, and the heat dissipation effect decreases; and when the total air outlet area is smaller, the air flow is difficult to flow out of the air outlet, and the heat cannot be taken away well, which affects the heat dissipation effect. Similarly, it can be seen that the larger the ratio of the total air inlet area to the total air outlet area, the lower the heat dissipation effect.

[0101] like Figure 4 As shown, the aforementioned air inlet channel 161 has an annular air inlet at one end of the housing 1. In a specific application example, the air inlet of the magnetic levitation blower of the present invention only includes the annular air inlet and the aforementioned air blast port 10. The area of the aforementioned air blast port 10 is S, and the area of the annular air inlet is Sx. Therefore, S 总进 =S+Sx.

[0102] like Figure 2 As shown, the air outlet 2 of the magnetic levitation blower of the present invention only includes the aforementioned first air outlet 7 and the second air outlet 2. The opening area of the aforementioned first air outlet 7 is Sz, the opening area of the second air outlet 2 is Sd, and S 总出 =Sd+Sz.

[0103] It should be noted here that: Figures 2 to 4 As shown, the tuyere 10 is generally a circular tuyere, the radius of the tuyere 10 is R, and the area of the tuyere 10 is S=Π*R 2 The first air outlet 7 is generally a circular opening, the radius of the first air outlet 7 is r1, and the area of the first air outlet 7 is Sc=Π*r1 2 The second air outlet 2 is generally a circular opening, the radius of the second air outlet 2 is r2, and the area of the second air outlet 2 is Sc=Π*r2 2 The outer radius of the annular air inlet is r3, the inner diameter of the annular air inlet is r4, and the area of the annular air inlet is Sx = Π*(r3-r4) 2 .

[0104] In some embodiments, as Figure 2 and Figure 3 As shown, the thrust disk 82 may be provided with an air hole structure 821 running through both axial ends to facilitate airflow from one axial end to the other end of the thrust disk 82 , which is beneficial to heat dissipation and cooling of the thrust disk 82 .

[0105] In some embodiments, as Figure 2 As shown, when the heat dissipation channel includes a second heat dissipation channel, the motor assembly 6 includes a stator 61 and a rotor 62. The rotor 62 is fixedly connected to the rotating shaft 4, and the stator 61 is used to drive the rotating shaft 4 to rotate by driving the rotor 62. The gap between the stator 61 and the rotor 62 forms an air passage 19, and the air passage 19 constitutes a part of the second heat dissipation channel. The cross-sectional area of the air passage 19 at its narrowest point in the cross section perpendicular to the axial direction of the rotating shaft 4 is Sq. The total opening area of the air hole structure 821 at either end of the thrust plate 82 is St. Among them, 0.6≤St / Sq≤0.8.

[0106] It should be noted here that: Figure 2 As shown, along the axial direction of the rotating shaft 4, the gap between the stator 61 and the rotor 62 is larger at both ends and smaller in the middle. The narrowest part of the air passage 19 is located in the middle of the rotating shaft 4 in the axial direction.

[0107] In the above example, by making 0.6≤St / Sq≤0.8, it can be ensured that the thrust plate 82 has sufficient strength and heat dissipation gas can pass through, so that the magnetic levitation blower of the present invention has a better heat dissipation effect. Specifically, when the ratio of St / Sq exceeds 0.8, that is, St is too large or too small, or Sq is too large or too small. When St is too large, it will reduce performance and increase wind friction loss. When St is too small, it will affect the heat dissipation effect and cannot effectively reduce the temperature of the thrust plate 82. When Sq is too large, it is easy to reduce the efficiency of the motor; when Sq is too small, the flow rate flowing between the stator 61 and the rotor 62 becomes smaller, resulting in a worse heat dissipation effect.

[0108] In some embodiments, as Figure 2 As shown, the housing 1 has a first end 101 and a second end 102 opposite each other in the axial direction of the rotating shaft 4. The housing 1 has a side surface located between the first end 101 and the second end 102, on which the first air outlet 7 and the second air outlet 2 are both located. One of the aforementioned air blast port 10 and the air inlet passage 161 is located at the first end 101, and the other is located at the second end 102.

[0109] In the above example, the magnetic levitation blower of the present invention forms an axial air inlet at both ends and a radial air outlet. The air inlet and air outlet are arranged on different sides, which helps prevent wind from crossing.

[0110] In some embodiments, as Figure 2 As shown, the distance between the end surface of the first end 101 and the end surface of the second end 102 of the housing 1 is L, and the distance between the motor assembly 6 and the end surface of the first end 101 can be 1 / 4L to 1 / 2L. The distance between the axial magnetic bearing 8 and the end surface of the first end 101 is 1 / 2L to 2 / 3L.

[0111] The present invention further provides a magnetic levitation compressor, which may include any of the above-mentioned magnetic levitation blowers. Since the magnetic levitation compressor utilizes the above-mentioned magnetic levitation blower, by providing an air outlet cavity 9 radially outwardly of the thrust plate 82, air flowing through the thrust plate 82 can be promptly directed into the air outlet cavity 9 and then discharged from the first air outlet 7. This improves the cooling effect at the thrust plate 82, reduces the overall temperature of the compressor, and improves the overall energy efficiency.

[0112] In some embodiments, when the casing 1 is further provided with a through hole 160 connected to the interior, and the rotating shaft 4 is rotatably matched with the through hole 160, the gap between the rotating shaft 4 and the through hole 160 forms an air inlet channel 161, and the air inlet also includes the air inlet channel 161, the magnetic levitation compressor also includes a volute and an impeller, the volute has a compression chamber, and the impeller is rotatably arranged in the compression chamber. The impeller is used to compress the gas in the compression chamber when rotating. The impeller is located on the side of the casing 1 away from the air outlet 10. The rotating shaft 4 extends out of the through hole 160, and the rotating shaft 4 is fixedly connected to the impeller so that the rotating shaft 4 can drive the impeller to rotate. The through hole 160 is connected to the compression chamber, wherein, as Figure 5 and Figure 6 As shown, a comb structure 16 is provided on the inner wall of the through hole 160 .

[0113] When the rotating shaft 4 drives the impeller to rotate, the impeller draws external air into the compression chamber for compression. Part of the gas can flow into the interior of the casing 1 through the air inlet channel 161, and then flow to the thrust plate 82 through the first heat dissipation channel to dissipate heat for the thrust plate 82.

[0114] In the above example, the comb structure 16 can control the amount of air flowing from the compression chamber into the air inlet channel 161 to prevent the amount of air flowing into the air inlet channel 161 from being too large and affecting the compression efficiency of the compressor.

[0115] In some embodiments, when the radius of the widest part of the via hole 160 is Rx, Figure 6 As shown, the comb structure 16 is uneven in the axial direction of the rotating shaft 4, and the widest part of the through hole 160 is located at the concave part of the comb structure 16. In other words, the radius of the concave part of the comb structure 16 is the aforementioned Rx.

[0116] For ease of understanding, the overall structure of the present invention is described below, and its working principle is explained.

[0117] In the existing magnetic levitation blower structure, the air cooling and heat dissipation effect is poor, and the temperature of the internal components of the blower is high, which affects the service life of the motor. In addition, in the existing magnetic levitation blower, the temperature at the thrust plate 82 is high, resulting in a high overall temperature, which affects the service life of the internal parts. The magnetic levitation blower of the present invention, by adding an air outlet cavity 9, the air outlet cavity 9 can exhaust the thrust plate 82, which is more conducive to improving the cooling effect of the thrust plate 82, reducing the temperature of the entire machine, and improving the energy efficiency ratio of the entire machine. In addition, the magnetic levitation blower of the present invention, by adding an air inlet channel 161, can output a larger air volume as a whole without changing the speed of the blower impeller 3, further reducing the temperature at the thrust plate 82 position, achieving the purpose of reducing the temperature of the entire machine, and making the magnetic levitation blower of the present invention have better performance and application value.

[0118] The magnetic levitation blower of the present invention simultaneously takes in air through the blast port 10 and the air inlet channel 161. The blast port 10 draws in air by rotating the blast impeller 3, and the air inlet channel 161 obtains part of the air volume through leakage from the compression chamber. The blast port 10 and the air inlet channel 161 cooperate to increase the overall air volume of the present invention compared to the previous one. In addition, the first air outlet 7 of the present invention is located in the radial direction of the thrust plate 82, so that the airflow can take away as much heat from the thrust plate 82 as possible when it flows out. Among them, the present invention can give full play to the air cooling and heat dissipation effect while changing the air volume and the airflow outflow position, thereby reducing the overall temperature.

[0119] The working principle of this utility model is as follows: Figure 2 As shown, external air flows from the air blast port 10 through the collector 18 into the interior of the housing 1. The air flows through the support base 20, and the gap between the stator 61 and the rotor 62 forms an air passage 19. The air flows through the air passage 19 to dissipate heat and cool the motor assembly 6, and the air flow takes away the heat. Part of the air flowing out of the air passage 19 flows to the thrust plate 82, further reducing the temperature at the axial magnetic bearing 8, and part of the air flows into the heat dissipation holes 51 in the heat dissipation sleeve 5, and then is discharged through the second air outlet 2. After the air flows to the thrust plate 82, it will flow to the air outlet cavity 9 and be discharged from the first air outlet 7. The air entering from the air inlet channel 161 enters the interior of the housing 1 and flows directly into the gap in the first radial magnetic bearing 12, effectively reducing the temperature there, and then flows to the axial magnetic bearing 8, further reducing the temperature at the axial magnetic bearing 8, and finally flows out from the first air outlet 7 and the second air outlet 2 respectively.

[0120] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. Such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A magnetic suspension blower, comprising a housing (1), a rotating shaft (4), a blower impeller (3), a motor assembly (6) and an axial magnetic suspension bearing (8), wherein the housing (1) is provided with an air inlet, and the housing (1) has a heat dissipation channel connected to the air inlet; the air inlet includes an air blast port (10), the motor assembly (6) is used to drive the rotating shaft (4) to rotate, so that the rotating shaft (4) drives the blower impeller (3) to rotate, and the blower impeller (3) drives air flow to enter from the air blast port (10); the axial magnetic suspension bearing (8) comprises a first axial stator (81), a second axial stator (83) and a thrust plate (82), the thrust plate (82) is located between the first axial stator (81) and the second axial stator (83), and the thrust plate (82) is sleeved on the rotating shaft (4); and the characteristics are: An air outlet cavity (9) is formed inside the housing (1) on the radially outer side of the thrust plate (82), and the housing (1) has a first air outlet (7) connected to the air outlet cavity (9), so that the air outlet cavity (9) discharges air through the first air outlet (7); The heat dissipation channel is connected to both the air inlet and the air outlet cavity (9), and the heat dissipation channel is used to introduce wind from the air inlet and allow the wind to flow through the thrust disk (82) into the air outlet cavity (9).

2. The magnetic levitation blower according to claim 1, characterized in that: The first axial stator (81) includes a first stator seat (81a) and a first annular flange (81b) provided on the first stator seat (81a), wherein the first annular flange (81b) extends radially along the rotating shaft (4); the second axial stator (83) includes a second stator seat (83a) and a second annular flange (83b) provided on the second stator seat (83a), wherein the second annular flange (83b) extends radially along the rotating shaft (4); The thrust plate (82) is arranged between the first stator seat (81a) and the second stator seat (83a); the first annular flange (81b) and the second annular flange (83b) are opposite to each other, and the space between them constitutes at least a part of the air outlet cavity (9).

3. The magnetic levitation blower according to claim 2, characterized in that: The first annular flange (81b) is located on a side of the first stator seat (81a) facing away from the second axial stator (83), and a first annular groove (91) is formed between the first annular flange (81b) and the first stator seat (81a); And / or, the second annular flange (83b) is located on the side of the second stator seat (83a) facing away from the first axial stator (81), and a second annular groove (92) is formed between the second annular flange (83b) and the second stator seat (83a).

4. The magnetic levitation blower according to claim 2, characterized in that: The outer peripheral surface of the first annular flange (81b) and / or the outer peripheral surface of the second annular flange (83b) are in sealing cooperation with the inner wall of the casing (1).

5. The magnetic levitation blower according to any one of claims 1 to 4, characterized in that: The inner wall of the housing (1) has a cavity wall area (11), and the cavity wall area (11) constitutes a part of the cavity wall of the air outlet cavity (9). The first air outlet (7) passes through the cavity wall area (11) to the outer wall of the housing (1), so that the first air outlet (7) is connected to the air outlet cavity (9).

6. The magnetic levitation blower according to any one of claims 1 to 4, characterized in that: The housing (1) is further provided with a through hole (160) communicating with the interior, and the rotating shaft (4) is rotatably engaged with the through hole (160); a gap between the rotating shaft (4) and the through hole (160) forms an air inlet channel (161), and the air inlet also includes the air inlet channel (161).

7. The magnetic levitation blower according to claim 6, characterized in that: The first axial stator (81) is closer to the through hole (160) relative to the second axial stator (83), a first gap (9a) is provided between the thrust plate (82) and the first axial stator (81), and the first gap (9a) is communicated with the air outlet cavity (9); The heat dissipation flow channel comprises a first heat dissipation flow channel, the heat dissipation flow channel is connected to the air inlet channel (161) through the first heat dissipation flow channel, and the first heat dissipation flow channel is used to guide the wind of the air inlet channel (161) to the first gap (9a), so that the wind flows through the thrust plate (82) through the first gap (9a) and enters the air outlet cavity (9).

8. The magnetic levitation blower according to claim 7, characterized in that: The rotating shaft (4) has a first section, a second section, and a third section connected in sequence along the axial direction; the rotating shaft (4) is rotatably engaged with the through hole (160) through the first section, and the rotating shaft (4) is sleeved on the axial magnetic suspension bearing (8) through the third section; a bearing seat (17) and a first radial magnetic suspension bearing (12) are sleeved in sequence on the second section along the axial direction; the first radial magnetic suspension bearing (12) is close to the axial magnetic suspension bearing (8) relative to the bearing seat (17); The first heat dissipation channel is used to allow the wind flowing out of the air inlet channel (161) to flow through the bearing seat (17) and the first radial magnetic bearing (12) in sequence, and then flow to the first gap (9a).

9. The magnetic levitation blower according to claim 6, characterized in that: The radius of the widest part of the through hole (160) is Rx, and the radius of the blast port (10) is R, wherein 0.21≤Rx / R≤0.

22.

10. The magnetic levitation blower according to any one of claims 1 to 4 and 7 to 9, characterized in that: The second axial stator (83) is closer to the air blast port (10) relative to the first axial stator (81), a second gap (9b) is provided between the thrust plate (82) and the second axial stator (83), and the second gap (9b) is communicated with the air outlet cavity (9); The heat dissipation flow channel includes a second heat dissipation flow channel, the heat dissipation flow channel is connected to the air blast port (10) through the second heat dissipation flow channel, and the second heat dissipation flow channel is used to guide the wind from the air blast port (10) to the second gap (9b), so that the wind flows through the thrust plate (82) through the second gap (9b) and enters the air outlet cavity (9).

11. The magnetic levitation blower according to claim 10, characterized in that: The second heat dissipation channel is further used to allow air to flow through the motor assembly (6) to dissipate heat from the motor assembly (6); The magnetic levitation blower further comprises an air outlet channel, and the housing (1) further comprises a second air outlet (2) connected to the air outlet channel, wherein the air outlet channel is used to introduce a portion of the wind flowing through the motor assembly (6) in the second heat dissipation channel, so that the wind dissipates heat from the motor assembly (6) and is then discharged through the second air outlet (2).

12. The magnetic levitation blower according to claim 11, characterized in that: A heat dissipation sleeve (5) is provided between the motor assembly (6) and the inner wall of the housing (1), and the heat dissipation sleeve (5) is used to dissipate heat from the motor assembly (6); The heat dissipation sleeve (5) has heat dissipation holes (51) inside, and the heat dissipation holes (51) constitute a part of the air outlet flow channel, so that the air outlet flow channel dissipates heat from the motor assembly (6) through the heat dissipation sleeve (5).

13. The magnetic levitation blower according to claim 11 or 12, characterized in that: The motor assembly (6) includes a stator (61) and a rotor (62), wherein the rotor (62) is fixedly connected to the rotating shaft (4), and the stator (61) is used to drive the rotating shaft (4) to rotate by driving the rotor (62); a gap between the stator (61) and the rotor (62) forms an air passage (19), and the air passage (19) constitutes a part of the second heat dissipation flow channel, and the second heat dissipation flow channel allows air to flow through the motor assembly (6) through the air passage (19); The motor assembly (6) is located between the second axial stator (83) and the blower impeller (3); a second air gap (832) is provided between the end of the stator (61) facing away from the blower impeller (3) and the second axial stator (83); and the air outlet channel is connected to the second heat dissipation channel at the second air gap (832).

14. The magnetic levitation blower according to claim 13, characterized in that: When a heat dissipation sleeve (5) is sleeved between the motor assembly (6) and the inner wall of the housing (1), the motor assembly (6) is sleeved in the heat dissipation sleeve (5) through the stator (61), the heat dissipation sleeve (5) is located between the second axial stator (83) and the blower impeller (3), the heat dissipation sleeve (5) has a second side and a third side opposite to each other in the axial direction, the second side is close to the second axial stator (83) relative to the third side, and the heat dissipation hole (51) has a first opening (512) on the second side; There is a gap between the second side and the second axial stator (83), so that the air outlet channel is connected to the second air outlet gap (832) through the first opening (512).

15. The magnetic levitation blower according to claim 14, characterized in that: The heat dissipation hole (51) is a blind hole extending from the second side to the third side; an air outlet (511) communicating with the heat dissipation hole (51) is provided on the outer wall of the heat dissipation sleeve (5); and the air outlet channel is communicated with the second air outlet (2) through the air outlet (511).

16. The magnetic levitation blower according to any one of claims 1 to 4, 7 to 9, 11, 12, 14, and 15, characterized in that: When the heat dissipation channel includes a second heat dissipation channel, the motor assembly (6) includes a stator (61) and a rotor (62), the rotor (62) is fixedly connected to the rotating shaft (4), and the stator (61) is used to drive the rotating shaft (4) to rotate by driving the rotor (62); the gap between the stator (61) and the rotor (62) forms an air passage (19), and the air passage (19) constitutes a part of the second heat dissipation channel; the cross-sectional area of the air passage (19) at its narrowest point in the cross section perpendicular to the axial direction of the rotating shaft (4) is Sq, and the opening area of the air blast port (10) is S; wherein 0.12≤Sq / S≤0.

21.

17. The magnetic levitation blower according to any one of claims 1 to 4, 7 to 9, 11, 12, 14, and 15, characterized in that: In the axial direction of the rotating shaft (4), the housing (1) has a first end (101) and a second end (102) opposite to each other, and the housing (1) has a cylindrical section (103) located between the first end (101) and the second end (102). The outer radius of the cylindrical section (103) at any point in the axial direction of the rotating shaft (4) is Rt, and the inner radius is Rtn, and 1.05≤Rt / Rtn≤1.

1.

18. The magnetic levitation blower according to any one of claims 1 to 4, 7 to 9, 11, 12, 14, and 15, characterized in that: The total air inlet area of the magnetic levitation blower is S 总进 The total outlet area of the magnetic levitation blower is S 总出 , where 0.36≤S 总进 / S 总出 ≤0.

62.

19. The magnetic levitation blower according to any one of claims 1 to 4, 7 to 9, 11, 12, 14, and 15, characterized in that: The thrust plate (82) is provided with an air hole structure (821) that passes through both axial ends.

20. The magnetic levitation blower according to claim 19, characterized in that: When the heat dissipation channel includes a second heat dissipation channel, the motor assembly (6) includes a stator (61) and a rotor (62), the rotor (62) is fixedly connected to the rotating shaft (4), and the stator (61) is used to drive the rotating shaft (4) to rotate by driving the rotor (62); the gap between the stator (61) and the rotor (62) forms an air passage (19), and the air passage (19) constitutes a part of the second heat dissipation channel; the cross-sectional area of the air passage (19) at the narrowest point in the cross section perpendicular to the axial direction of the rotating shaft (4) is Sq; the total opening area of the air hole structure (821) at either end of the axial ends of the thrust plate (82) is St; wherein 0.6≤St / Sq≤0.

8.

21. A magnetic levitation compressor, characterized in that: The invention comprises the magnetic levitation blower according to any one of claims 1 to 20.

22. The magnetic levitation compressor according to claim 21, characterized in that: When the casing (1) is further provided with a through hole (160) communicating with the interior, and the rotating shaft (4) is rotatably engaged with the through hole (160), the gap between the rotating shaft (4) and the through hole (160) forms an air inlet channel (161), and the air inlet further includes the air inlet channel (161), the magnetic levitation compressor further includes a volute and an impeller, the volute having a compression chamber, the impeller being rotatably arranged in the compression chamber, and the impeller being used to compress the gas in the compression chamber when rotating; the impeller is located on a side of the casing (1) facing away from the air blast port (10), the rotating shaft (4) extends out of the through hole (160), and the rotating shaft (4) is fixedly connected to the impeller so that the rotating shaft (4) can drive the impeller to rotate; The through hole (160) is in communication with the compression chamber, wherein a comb tooth structure (16) is provided on the inner wall of the through hole (160).

Images