A compressor

Abstract

This invention relates to the field of gas compressor technology, specifically to a compressor comprising a housing with an internal cavity, an inlet and an outlet; a first air bearing and a second air bearing, both fixedly disposed within the housing, dividing the cavity along a first direction into interconnected first, second, and third chambers; the inlet connecting to the first chamber and the outlet connecting to the third chamber; and a drive assembly comprising a shaft, a first stator, a first rotor, and an impeller; the stator fixedly disposed within the second chamber; the shaft rotatably connected to the first and second air bearings; the first rotor fixedly disposed within the portion of the shaft located in the second chamber; and the impeller fixedly disposed within the portion of the shaft located in the third chamber. This invention avoids solid friction caused by mechanical contact, reduces the large amount of heat generated by friction, lowers power loss, improves overall efficiency, ensures operational stability, and overcomes the limitations of rotor speed limits and equipment lifespan.

Description

Technical Field

[0001] This invention relates to the field of gas compressor technology, and in particular to a gas compressor. Background Technology

[0002] In existing technologies, the performance of the compressor, as a core fluid power component, is highly dependent on the rotor's operating speed. To achieve higher exhaust pressure and flow rate, continuously increasing the rotational speed has become a key technological path. Existing patent document CN222254392U discloses a cooling air path structure for an air-cooled compressor, employing a traditional bearing structure. The solid friction from mechanical contact increases dramatically with increasing rotational speed, generating significant frictional heat, leading to a substantial increase in bearing temperature and requiring a complex cooling system. This also results in severe power loss, causing a decrease in overall machine efficiency. Furthermore, continuous mechanical wear not only alters the dynamic clearance of the bearing, affecting operational stability, but also fundamentally limits the rotor's maximum rotational speed and the equipment's lifespan. In addition, contact vibration and noise at high speeds are particularly prominent, impacting product reliability and user experience. Therefore, the inherent defects of ordinary mechanical bearings in terms of friction, wear, heat generation, and efficiency have become major obstacles restricting the development of compressors towards higher speeds, longer lifespans, and better efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a compressor that solves the problem of reduced efficiency and service life caused by traditional mechanical bearings in existing compressors.

[0004] The technical solution of the present invention is: a compressor, comprising: The housing has an internal cavity and an air inlet and an air outlet. The first air bearing and the second air bearing are both fixed inside the housing and divide the receiving cavity into a first chamber, a second chamber and a third chamber that are interconnected along the first direction. The air inlet is connected to the first chamber and the air outlet is connected to the third chamber. The drive assembly includes a rotating shaft, a first stator, a first rotor, and an impeller. The first stator is fixed in the second chamber. The rotating shaft is rotatably connected to the first air bearing and the second air bearing. The first rotor is fixed in the portion of the rotating shaft located in the second chamber. The impeller is fixed in the portion of the rotating shaft located in the third chamber. It is used to generate negative pressure in the third chamber, so that airflow enters from the air inlet, is compressed in the receiving chamber, and is output from the air outlet.

[0005] Preferably, a heat dissipation shroud is fixed inside the housing, and the heat dissipation shroud has a plurality of heat dissipation channels connecting the first chamber and the third chamber. The airflow at the air inlet is divided into at least two streams in the first chamber. One stream of airflow enters the third chamber through the first chamber and the second chamber, and the other stream of airflow flows from the first chamber through the heat dissipation channels and then enters the third chamber.

[0006] Preferably, the first air bearing includes a first bearing portion and a first connecting portion. The first bearing portion extends along a first direction. When airflow passes through the first bearing portion, the shaft is suspended and rotates on the first bearing portion. The first bearing portion is fixed to the heat sink through the first connecting portion. The first connecting portion is sealed to the heat sink. The first connecting portion is provided with a first heat dissipation hole communicating with the heat dissipation channel and an air guide hole communicating with the first chamber and the second chamber.

[0007] Preferably, the second air bearing includes a second bearing portion and a second connecting portion. The central axis of the first bearing portion is coaxial with the central axis of the second bearing portion. When the airflow passes through the second bearing portion, the rotating shaft is suspended and rotated on the second bearing portion. The second bearing portion is fixed on the heat sink through the second connecting portion. The second connecting portion is sealed to the heat sink. The second connecting portion is provided with a second heat dissipation hole communicating with the heat dissipation channel.

[0008] Preferably, a support member is fixedly provided on the side of the second connecting part facing the third chamber, the rotating shaft is movably inserted through the support member, and a gap for airflow is formed between the rotating shaft and the inner wall of the support member. A fourth chamber is formed between the support member and the second air bearing. A thrust member is provided in the fourth chamber. The thrust member is fixed on the outer periphery of the rotating shaft and is constrained between the second connecting part and the support member.

[0009] Preferably, the fourth chamber is further provided with two third air bearings, which are respectively disposed on both sides of the thrust member along its axial direction and fixed to the inner wall of the second connecting part and the support member, and an air film is formed between the third air bearings and the thrust member.

[0010] Preferably, the third air bearing comprises: The support platform is constructed in a ring shape, and its side is fixed to the second connecting part or the support member. Several support bars are fixed in a circumferential array on the side of the support platform facing the thrust member and extend radially along the support platform; Several air guide plates, arranged in a fan-shaped ring, are fixed on the corresponding support strips, and a gap is formed between the air guide plates and the support platform.

[0011] Preferably, the inner arc edge of the air guide plate overlaps with the inner wall of the support platform, and there is an inclination angle between the air guide plate and the support platform, so that a wedge-shaped gap is formed between the surface of the air guide plate and the disc surface of the thrust member.

[0012] Preferably, the first air bearing is provided with a rotary transformer, the rotary transformer including a second stator and a second rotor, the second stator being fixed to the side of the first air bearing facing the first chamber, and the second rotor being fixed to the portion of the shaft located in the first chamber.

[0013] Compared with the prior art, the advantages of the present invention are: Inside the housing, a first and a second air-bearing bearing divide the accommodating cavity into interconnected first, second, and third chambers. The drive assembly's shaft is rotatably connected to the two air-bearing bearings, positioning the stator, rotor, and impeller within their respective chambers. The air-bearing bearings replace traditional mechanical bearings, avoiding solid friction caused by mechanical contact. This significantly reduces frictional heat accumulation due to high-speed rotation, effectively controlling energy loss and improving overall machine efficiency. Simultaneously, it eliminates continuous mechanical wear, preserving the dynamic clearance of the bearings and ensuring operational stability, thus overcoming the limitations of rotor speed limits and equipment lifespan. Furthermore, it avoids contact vibration and noise at high speeds, enhancing product reliability and user experience. This effectively solves the main obstacles hindering the development of compressors towards higher speeds, longer lifespans, and higher efficiency in terms of friction, wear, heat generation, and efficiency associated with ordinary mechanical bearings. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of a compressor according to the present invention; Figure 2 This is a schematic diagram of the axial cross-sectional structure of a compressor according to the present invention; Figure 3 This is a radial cross-sectional view of a compressor according to the present invention. Figure 4 This is a schematic diagram of the structure of the first air bearing and the second air bearing described in this invention; Figure 5 This is a schematic diagram of the structure of the third air bearing described in this invention; Figure 6 This is an exploded structural diagram of the third air bearing described in this invention; Figure 7 This is a schematic diagram of the structure of the second air bearing and support member described in this invention; Figure 8 This is a schematic diagram of the air path of a compressor according to the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Housing; 11. Receiving cavity; 111. First chamber; 112. Second chamber; 113. Third chamber; 12. Air inlet; 13. Air outlet; 14. Heat sink; 141. Heat dissipation channel; 2. First air bearing; 21. First bearing part; 22. First connecting part; 23. First heat dissipation hole; 24. Air guide hole; 3. Second air bearing; 31. Second bearing part; 32. Second connecting part; 33. Second heat dissipation hole; 4. Drive assembly; 41. Rotating shaft; 42. First stator; 43. First rotor; 44. Impeller; 5. Rotary transformer; 51. Second stator; 52. Second rotor; 6. Support member; 61. Fourth chamber; 7. Thrust member; 8. Third air bearing; 81. Support platform; 82. Support bar; 83. Air guide plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0017] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] like Figures 1 to 4As shown, a compressor includes a housing 1, a first air bearing 2, and a second air bearing 3. The housing 1 has a receiving cavity 11. The first air bearing 2 and the second air bearing 3 are fixed inside the housing 1, together dividing the receiving cavity 11 into three interconnected spaces, which are sequentially arranged along a first direction as a first chamber 111, a second chamber 112, and a third chamber 113. The housing 1 has an air inlet 12 and an air outlet 13. The air inlet 12 connects to the first chamber 111, and the air outlet 13 connects to the third chamber 113. A drive assembly 4 is provided inside the housing 1 to generate negative pressure in the third chamber 113, causing airflow to enter through the air inlet 12 and compressing the airflow as it passes through the receiving cavity 11.

[0020] The drive assembly 4 includes a shaft 41, a first stator 42, a first rotor 43, and an impeller 44. The first stator 42 is fixed in the second chamber 112. The shaft 41 is rotatably connected to the first air bearing 2 and the second air bearing 3. The first rotor 43 is fixed in the portion of the shaft 41 located in the second chamber 112, and the impeller 44 is fixed in the portion of the shaft 41 located in the third chamber 113. In this embodiment, the drive assembly 4 is a reluctance motor, which maintains high efficiency over a wide range of speeds and power. Similar to ordinary synchronous or asynchronous motors, it often employs two-phase or single-phase capacitor windings. The first rotor 43 is a stacked structure of double salient pole silicon steel sheets without windings or permanent magnets, and has single-phase or multi-phase excitation modes.

[0021] The housing 1 extends along a first direction. Preferably, the housing 1 containing the first chamber 111 is a thin-walled component with a gradually increasing inner diameter. The housing 1 containing the second chamber 112 is a column extending along the first direction. A heat dissipation shroud 14 is fixed inside the housing 1. The outer wall of the heat dissipation shroud 14 is integrally formed with the inner wall of the housing 1. One end of the heat dissipation shroud 14 forms a stepped structure with the housing 1 containing the first chamber 111. The heat dissipation shroud 14 has several heat dissipation channels 141 connecting the first chamber 111 and the second chamber 112. Preferably, the several heat dissipation channels 141 are circumferentially distributed around the central axis of the heat dissipation shroud 14. The airflow at the air inlet 12 is divided into at least two streams in the first chamber 111. One stream enters the second chamber 112 from the first chamber 111 and then enters the third chamber 113. The other stream flows from the first chamber 111 through the heat dissipation channels 141 and then enters the third chamber 113. Part of the diverted airflow flows through the heat dissipation channel 141, which can specifically cool the heat dissipation shroud 14 and the drive component 4 in the second chamber 112, significantly increasing the heat dissipation area and enhancing heat exchange. This effectively controls the temperature of the drive component 4 during the air compression process, improving the working stability and lifespan of the equipment.

[0022] The first air bearing 2 includes a first bearing portion 21 and a first connecting portion 22. The first bearing portion 21 extends along a first direction and is configured as a hollow cylindrical structure.

[0023] The first connecting portion 22 is constructed as a disc structure. The inner wall of the first connecting portion 22 is fixed to the outer wall of the first bearing portion 21, and the outer wall of the first connecting portion 22 abuts against the inner wall of the housing 1. The side of the first connecting portion 22 is sealed and fixedly connected to the heat sink 14. In this embodiment, the first connecting portion 22 is bolted to the end face of the heat sink 14. Preferably, the first connecting portion 22 is provided with a first sealing ring. The outer wall of the first sealing ring is sealed and connected to the inner wall of the heat sink 14 near its inlet, preventing the airflow of the first chamber 111 from leaking into the second chamber 112 at the inlet of the heat dissipation channel 141. The first connecting portion 22 is provided with a first heat dissipation hole 23 communicating with the heat dissipation channel 141, and the first heat dissipation hole 23 corresponds one-to-one with the heat dissipation channel 141. The first connecting portion 22 not only improves the controllability and consistency of heat dissipation efficiency, but also avoids the decrease in cooling performance caused by short circuit of leaked airflow. At the same time, the disc structure itself enhances the overall structural stability.

[0024] The air film formed by the gap between the first air bearing 2 and the rotating shaft 41 hinders airflow through this gap. The first connecting part 22 is provided with an air guide hole 24 connecting the first chamber 111 and the second chamber 112. Since the normal operation of the air bearing depends on the thin and stable air film formed between it and the rotating shaft 41, if the airflow cannot flow smoothly through the air bearing area, it will cause the pressure on the first chamber 111 side to be too high and the pressure on the second chamber 112 side to be too low. This pressure imbalance will destroy the uniformity and rigidity of the air film. The air guide hole 24 directly balances the pressure on both sides of the bearing by diverting a portion of the airflow, providing a stable pressure environment for the air film.

[0025] A rotary transformer 5 is provided on the side of the first air bearing 2 facing the first chamber 111 for detecting the position and rotational speed of the shaft 41. The rotary transformer 5 includes a second stator 51 and a second rotor 52. The second stator 51 is fixed to the side of the first air bearing 2 facing the first chamber 111, and the second rotor 52 is fixed to the portion of the shaft 41 located in the first chamber 111. A high-frequency AC excitation signal is input to the second stator 51 fixed to the side of the first air bearing 2. This signal is transmitted to the second rotor 52 fixed to the shaft 41 via electromagnetic coupling. When the shaft 41 rotates, the change in angle of the second rotor 52 relative to the second stator 51 modulates the coupled signal, thereby generating induced voltages in the two orthogonal output windings of the second stator 51 with amplitudes related to the sine and cosine angles of the rotor, respectively. These signals are sent to an external decoding chip for processing, and finally the precise angular position and rotational speed of the shaft 41 are determined in real time.

[0026] The second air bearing 3 includes a second bearing portion 31 and a second connecting portion 32. The second bearing portion 31 extends along a first direction, and the central axis of the first bearing portion 21 is coaxial with the center line of the second bearing portion 31. A rotating shaft 41 is rotatably connected to the first bearing portion 21 and the second bearing portion 31. When the rotating shaft 41 moves relative to the bearing, fluid dynamic pressure is generated in the gap. No external air source is required. During high-speed rotation, due to the viscosity of air, the gas is carried into the contraction gap, the pressure increases and forms an air film bearing force, realizing the separation of the rotating shaft 41 from the bearing, reducing frictional heat generation, improving transmission efficiency, and the rotational speed can reach 1.3 million revolutions per minute.

[0027] The inner wall of the second connecting part 32 is fixed to the outer wall of the second bearing part 31. The second connecting part 32 is constructed as a disc structure, and its outer wall abuts against the inner wall of the housing 1. The side of the second connecting part 32 is sealed and fixedly connected to the heat sink 14. In this embodiment, the second connecting part 32 is bolted to the end face of the heat sink 14. Preferably, a second sealing ring is provided on the outlet side of the second connecting part 32 facing the heat sink 14. The outer wall of the second sealing ring is sealed and connected to the inner wall of the heat sink 14 near its outlet, thereby preventing the airflow of the second chamber 112 from leaking into the third chamber 113 at the outlet of the heat dissipation channel 141. The second connecting part 32 is provided with a second heat dissipation hole 33 communicating with the heat dissipation channel 141. The second heat dissipation hole 33 corresponds one-to-one with the heat dissipation channel 141. The second connecting part 32 ensures that the airflow flows in the heat dissipation channel 141 according to a predetermined path, improving the heat dissipation efficiency, while avoiding mutual interference of airflow between different chambers, ensuring the stability and independence of the operation of each part inside the housing 1.

[0028] like Figures 5 to 7 As shown, a support member 6 is fixedly mounted on the side of the second connecting part 32 facing the third chamber 113. A rotating shaft 41 is movably inserted through the support member 6, and a gap is formed between the rotating shaft 41 and the inner wall of the support member 6 to allow airflow. A fourth chamber 61 in the shape of an annulus is formed between the support member 6 and the second air bearing 3. The airflow of the second air bearing 3 passes through the fourth chamber 61 and then enters the third chamber 113.

[0029] The fourth chamber 61 contains a thrust member 7 and two third air bearings 8. The thrust member 7 is constructed as a disc, and its inner wall is fixed to the outer periphery of the rotating shaft 41. The thrust member 7 is constrained by the second air bearing 3 and the support member 6 to limit the axial movement of the rotating shaft 41. Two sets of third air bearings 8 are respectively disposed on both sides of the thrust member 7 along its axial direction. One third air bearing 8 is fixed to the inner wall of the second connecting part 32, and the other third air bearing 8 is fixed to the inner wall of the support member 6. An air film is formed between both third air bearings 8 and the thrust member 7, meaning that the thrust member 7 is in a suspended state when airflow passes through it. In this embodiment, the airflow directions on both sides of the thrust member 7 are parallel, and the airflow directions on both sides of the thrust member 7 are perpendicular to the airflow direction within the second air bearing 3.

[0030] Specifically, the third air bearing 8 includes a support platform 81, several support bars 82, and several air guide plates 83. The support platform 81 is constructed in a ring shape, and the inner wall of the support platform 81 forms a gap with the rotating shaft 41. The side of the support platform 81 is fixed to the second connecting part 32.

[0031] A plurality of support strips 82 are arranged in a circumferential array and fixed on the side of the support platform 81 away from the second connecting part 32, and the plurality of support strips 82 extend radially along the support platform 81. The air guide plate 83 is configured as a fan ring and is fixed on the support strips 82, so that a gap is formed between the air guide plate 83 and the support strips 82.

[0032] Preferably, the inner arc edge of the air guide plate 83 overlaps with the inner wall of the support platform 81, and the straight edge of one side of the air guide plate 83 is flush with the support strip 82, so that the air guide plate 83 forms a cantilever structure. More preferably, there is a slight inclination angle between the air guide plate 83 and the support platform 81, so that a wedge-shaped gap with varying distances is formed between the surface of the air guide plate 83 and the disc surface of the thrust member 7.

[0033] Each set of bearing bars 82 and air guide plates 83 generates a local high-pressure zone. The high pressure generated by all the circumferentially distributed bearing bar 82 / air guide plate 83 units is aggregated to form a uniform, stable, and highly rigid air film. During the high-speed rotation of the thrust member 7, the thrust member 7 and the two third air bearings 8 are completely out of axial contact. The two air films formed by the two air bearings and the thrust member 7 are dynamically balanced, thus providing axial thrust resistance to the drive shaft.

[0034] In this embodiment, the shell 1 portion constituting the third chamber 113 is a turbine shell 1 structure to reduce gas turbulence, reduce energy loss, reduce drag loss, and improve gas energy conversion rate.

[0035] Implementation principle: like Figure 8As shown, the stator and rotor, through electromagnetic effect, cause the rotor to drive the rotating shaft 41 to rotate. The rotating shaft 41 drives the impeller 44 located in the third chamber 113 to rotate, causing the third chamber 113 to generate negative pressure and forcing air inlet 12 to enter. After entering the first chamber 111, the airflow is divided into three streams. The first stream flows into the heat dissipation channel 141, dissipates heat from the heat sink 14 and drive assembly 4, and then flows into the third chamber 113. The second stream enters the second chamber 112 from the first chamber 111 through the air guide hole 24 of the first air bearing 2. Part of the airflow in the second chamber 112 enters the third chamber 113 through the air guide hole 24 of the second air bearing 3 to balance the air pressure between the first chamber 111, the second chamber 112, and the third chamber 113. Airflow enters the second chamber 112 through the gap between the first air bearing 2 and the rotating shaft 41, causing the rotating shaft 41 to levitate and rotate relative to the first air bearing 2. Part of the airflow in the second chamber 112 enters the gap between the second air bearing 3 and the rotating shaft 41, and then passes through the gaps between the two third air bearings 8 and the thrust member 7 before entering the third chamber 113. On the one hand, this causes the rotating shaft 41 to levitate and rotate relative to the second air bearing 3, and on the other hand, it restricts the axial movement of the rotating shaft 41, ensuring that the rotating shaft 41 can rotate stably and efficiently.

[0036] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A compressor, characterized in that, include: The housing (1) has an internal cavity (11) and an air inlet (12) and an air outlet (13). The first air bearing (2) and the second air bearing (3) are both fixed inside the housing (1) and divide the receiving cavity (11) into a first chamber (111), a second chamber (112) and a third chamber (113) that are connected to each other along the first direction. The air inlet (12) is connected to the first chamber (111) and the air outlet (13) is connected to the third chamber (113). The drive assembly (4) includes a rotating shaft (41), a first stator (42), a first rotor (43), and an impeller (44). The first stator (42) is fixed in the second chamber (112). The rotating shaft (41) is rotatably connected to the first air bearing (2) and the second air bearing (3). The first rotor (43) is fixed in the portion of the rotating shaft (41) located in the second chamber (112). The impeller (44) is fixed in the portion of the rotating shaft (41) located in the third chamber (113) and is used in the third chamber (113). A negative pressure is generated, causing the airflow to enter from the air inlet (12), be compressed in the receiving cavity (11), and be output from the air outlet (13). The second air bearing (3) includes a second bearing part (31) and a second connecting part (32). The second connecting part (32) is fixedly provided with a support member (6) on the side facing the third chamber (113). A fourth chamber (61) is formed between the support member (6) and the second air bearing (3). A thrust member (7) is provided in the fourth chamber (61). The fourth chamber (61) is also provided with two third air bearings (8). The third air bearing (8) includes: The support platform (81) is constructed as a ring-shaped structure; Several support bars (82) are fixed in a circumferential array on the side of the support platform (81) facing the thrust member (7) and extend radially along the support platform (81); Several air guide plates (83), in the shape of fan rings, are fixed on the corresponding support strips (82), and a gap is formed between the air guide plates (83) and the support platform (81); The inner arc edge of the air guide plate (83) overlaps with the inner wall of the support platform (81), and there is an inclination angle between the air guide plate (83) and the support platform (81), so that a wedge-shaped gap is formed between the surface of the air guide plate (83) and the disk surface of the thrust member (7).

2. The compressor according to claim 1, characterized in that: The housing (1) is fixedly provided with a heat dissipation shroud (14). The heat dissipation shroud (14) has a plurality of heat dissipation channels (141) connecting the first chamber (111) and the third chamber (113). The airflow at the air inlet (12) is divided into at least two streams in the first chamber (111). One stream of airflow enters the third chamber (113) through the first chamber (111) and the second chamber (112), while the other stream of airflow flows from the first chamber (111) through the heat dissipation channels (141) and then enters the third chamber (113).

3. A compressor according to claim 2, characterized in that: The first air bearing (2) includes a first bearing part (21) and a first connecting part (22). The first bearing part (21) extends along a first direction. When the airflow passes through the first bearing part (21), the rotating shaft (41) is suspended and rotates on the first bearing part (21). The first bearing part (21) is fixed on the heat sink (14) through the first connecting part (22). The first connecting part (22) is sealed to the heat sink (14). The first connecting part (22) is provided with a first heat dissipation hole (23) communicating with the heat dissipation channel (141) and an air guide hole (24) communicating with the first chamber (111) and the second chamber (112).

4. A compressor according to claim 3, characterized in that: The central axis of the first bearing part (21) is coaxial with the central axis of the second bearing part (31). When the airflow passes through the second bearing part (31), the rotating shaft (41) is suspended and rotated on the second bearing part (31). The second bearing part (31) is fixed on the heat sink (14) through the second connecting part (32). The second connecting part (32) is sealed to the heat sink (14). The second connecting part (32) is provided with a second heat dissipation hole (33) that communicates with the heat dissipation channel (141).

5. A compressor according to claim 4, characterized in that: The rotating shaft (41) is movably inserted through the support member (6), and a gap is formed between the rotating shaft (41) and the inner wall of the support member (6) for airflow to pass through. The thrust member (7) is fixed on the outer periphery of the rotating shaft (41) and is constrained between the second connecting part (32) and the support member (6).

6. A compressor according to claim 5, characterized in that: Two third air bearings (8) are respectively disposed on both sides of the thrust member (7) along its axial direction and are respectively fixed to the inner wall of the second connecting part (32) and the support member (6), and an air film is formed between the third air bearings (8) and the thrust member (7).

7. A compressor according to claim 2, characterized in that: The first air bearing (2) is provided with a rotary transformer (5), the rotary transformer (5) includes a second stator (51) and a second rotor (52), the second stator (51) is fixed on the side of the first air bearing (2) facing the first chamber (111), and the second rotor (52) is fixed on the part of the rotating shaft (41) located in the first chamber (111).

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