An easily disassembled air bearing

Abstract

The invention discloses an easily detachable air-floating bearing, which belongs to the technical field of air-floating bearings. The structure thereof comprises a bearing base, a stator sleeve and a rotor; the stator sleeve is detachably fixedly installed in the bearing base, the rotor is rotatably installed in the stator sleeve, an exhaust gap is provided between the inner cylindrical surface of the stator sleeve and the outer cylindrical surface of the rotor, the exhaust gap is in a circular ring shape, and the thickness of the circular ring-shaped exhaust gap is consistent at all places; a rotor sleeve is fixedly installed in the middle part of the outer side of the rotor, and the rotor sleeve is located between two combined sleeves; the application can effectively reduce the direct contact surface between the rotor and the sleeve, optimize the structure of the airflow passage, and extend the service life of the equipment, and on this basis, improve the integrity and compactness of the internal structure of the bearing, simplify the bearing disassembly process, improve maintenance efficiency, and reduce maintenance time.

Description

Technical Field

[0001] The invention relates to the technical field of air bearings, in particular to an easily disassembled air bearing. Background Art

[0002] The working principle of air bearings is to support the rotating body through a gas film, so there is no direct contact during operation, which reduces wear and friction and extends the service life of the bearing;

[0003] An anti-disturbance air bearing with an existing application number of CN202210680029.3 is disclosed in the patent document. A method of installing a flexible sleeve at the throttling air hole is disclosed to alleviate the interference of air pressure fluctuations on the bearing movement stability. Specifically: after the small hole throttle is covered with the flexible sleeve, the impact energy of the gas on the throttling column can be consumed by the deformation of the flexible sleeve itself when the air pressure fluctuates, thereby greatly attenuating the air pressure fluctuation, which is equivalent to introducing an air pressure low-pass filter, so that the static pressure gas can smoothly reach the supporting air film gap, which can effectively reduce the influence of the air source pressure fluctuation on the movement accuracy of the air bearing;

[0004] However, when using the technical solution in the above-mentioned patent document, due to the large diameter of the axial support section, when no gas is introduced, the axial support section is in direct contact with the bearing base over a large area. After the gas is introduced, the axial support section moves relative to the bearing base, which will cause friction damage to the surface of the axial support section; and since there are many right-angle structures in the airflow passage inside the bearing base, when the airflow flows rapidly, the kinetic energy of the gas molecules will increase, accompanied by the friction between the gas molecules and the inner wall of the airflow passage, resulting in a higher temperature, and the long-term high temperature will cause thermal damage to the flexible sleeve, affecting the performance and service life of the bearing components. After the various components of the equipment are worn, they need to be disassembled and maintained; since the various components of the equipment are highly dispersed and independent of each other, the equipment maintenance efficiency is low. Therefore, the present application provides an easily removable air-floating bearing. Summary of the invention

[0005] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide an easily disassembled air-floating bearing, which can effectively reduce the direct contact area between the rotor and the sleeve, optimize the structure of the airflow passage, extend the service life of the equipment, and on this basis, improve the integrity and compactness of the internal structure of the bearing, simplify the bearing disassembly process, improve maintenance efficiency, and reduce maintenance time.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] Provided is an easily detachable air bearing, comprising a bearing base, a stator sleeve and a rotor; the stator sleeve is detachably fixedly mounted in the bearing base, the rotor is rotatably mounted in the stator sleeve, an exhaust gap is formed between the inner cylindrical surface of the stator sleeve and the outer cylindrical surface of the rotor, the exhaust gap is in a circular ring shape, and the thickness of the circular ring-shaped exhaust gap is consistent at all locations; a rotor sleeve is fixedly mounted in the middle of the outer side of the rotor, and the rotor sleeve is located between two combined sleeves.

[0008] Among them, a plurality of air flow passages I are arranged at equal angle intervals in the combined sleeve, the air flow passages I in the two combined sleeves extend to both ends of the rotor sleeve respectively, and an air injection pipe connected to the air flow passage I is arranged on the base.

[0009] Furthermore, the stator sleeve is composed of two combined sleeves spliced ​​in opposite directions, and a plurality of plug-in arms are fixedly installed at equal angular intervals on the side of the combined sleeve, and the plug-in arms on the two combined sleeves are plug-connected to each other, and an annular air cavity is formed between the inner side surface of the combined sleeve, the inner side surface of the plug-in arm, the outer side surface of the rotor and the outer side surface of the rotor sleeve, and the air flow passage I is connected to the exhaust gap through the annular air cavity.

[0010] Furthermore, annular grooves are respectively provided at both ends of the rotor sleeve, and annular ridges which can be plugged into the annular grooves are respectively provided on the two combined sleeves, and an air film gap is formed between the annular ridges and the annular grooves.

[0011] Furthermore, the multiple airflow passages I are divided into two groups, the ends of the two groups of airflow passages I respectively penetrate the upper and lower sides of the annular convex edge, and the two groups of airflow passages I are staggered.

[0012] Furthermore, inclined surfaces I are respectively arranged on upper and lower sides of the outer side of the annular convex edge, and inclined surfaces II are respectively arranged on upper and lower sides of the inner side of the annular groove, and a first conical exhaust channel is formed between inclined surfaces I and II.

[0013] Furthermore, a plurality of airflow passages II are arranged at equal angular intervals inside the rotor sleeve, and the airflow passage II extends in a zigzag path and passes through both ends of the rotor sleeve, one end of the airflow passage II is close to the inner side of the plug-in arm, and the other end of the airflow passage II is close to the outer side of the rotor.

[0014] Furthermore, the rotor shaft sleeve is composed of two semi-annular sleeves spliced ​​in opposite directions, a multi-ribbed shaft rod is integrally formed in the middle of the rotor, the semi-annular sleeve is inserted and installed on the side of the multi-ribbed shaft rod, and the two semi-annular sleeves are detachably fixed together by at least two studs.

[0015] Furthermore, a plurality of annular air inlet grooves are provided on the inner side surface of the base, and the air injection pipe is connected with a plurality of air flow passages I through the annular air inlet grooves corresponding to the positions.

[0016] Furthermore, bushings are detachably mounted on the outer sides of the two semi-annular sleeves, and the outer side surfaces of the semi-annular sleeves are provided with a concave edge I for accommodating the bushings to be embedded and placed.

[0017] Furthermore, a sealing ring is sleeved on the outer side of the combined sleeve, and a concave edge II is provided on the outer side of the combined sleeve for accommodating the sealing ring to be embedded and placed, and an air hole connected to the air flow passage I is provided on the sealing ring.

[0018] Furthermore, the width of the sealing ring is greater than the width of the annular air inlet groove.

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

[0020] 1. The easily detachable air-floating bearing of the example of the present invention. When the easily detachable air-floating bearing of the present application is used, the purified air is filled into the air injection pipe, and the air flow flows through the air flow passage I and the annular air cavity in turn, and is discharged from the exhaust gap. Since the thickness of the annular exhaust gap remains consistent at all places, the relative position of the rotor between the two combined sleeves remains dynamically constant, so that the rotor and the two combined sleeves will not be in direct contact, thereby avoiding wear and friction and extending the service life of the bearing; the corners inside the air flow passage I are all provided with smooth arc transition angles, which optimize the structure of the air flow passage and avoid the high temperature generated by the friction between the gas molecules and the inner wall of the air flow passage when the air flow flows rapidly in the right-angle structure of the air flow passage, which affects the service life of the equipment.

[0021] 2. The easily removable air bearing in the example of the present invention, when it is necessary to disassemble the air bearing as a whole, only the fasteners located on the outer side of the combined sleeves need to be rotated to disassemble the two combined sleeves and expose the rotor sleeves. At this time, there is a certain operating space between the inner side of the base and the outer side of the rotor sleeve, which can realize the inspection and maintenance of the use of the rotor sleeve. Using the above scheme, the bearing disassembly process is simplified, the maintenance efficiency is improved, the maintenance time is reduced, and potential operating errors are reduced.

[0022] 3. The easily removable air bearing of the example of the present invention utilizes the bushing as a buffer between the inner side of the combined sleeve and the outer side of the rotor sleeve when the air bearing is running, thereby avoiding friction damage caused by large-area contact between the combined sleeve and the rotor sleeve, thereby increasing the service life of the equipment; when the bushing is severely worn, it is only necessary to pull out the two combined sleeves from both sides of the inside of the base, and reach into the base to disassemble and replace the bushings, which is easy to operate and has high maintenance efficiency.

[0023] 4. In the example of the easily detachable air-floating bearing of the present invention, an air film gap is formed between the annular ridge and the annular groove; when the air flow flows through the air film gap, the surface of the annular ridge is separated from the surface of the annular groove, so that the annular ridge and the annular groove will not be in direct contact, thereby avoiding wear and friction and extending the service life of the bearing; in the process of the air flow being discharged from the end of the air flow passage I, the air flow exerts an axial driving force on the rotor sleeve. At the same time, under the action of the inclined surfaces I and II, the air flow can also exert a radial driving force on the rotor sleeve, and multiple air flow passages I are evenly distributed, so that the relative positions of the rotor and the rotor sleeve and the bearing base remain dynamically constant, thereby increasing the operating stability and anti-interference ability of the air-floating bearing.

[0024] 5. In the example of the easily detachable air bearing of the present invention, the first conical exhaust channel and the second conical exhaust channel are both configured to expand outward along the direction of the airflow flow; in this way, the pressure of the airflow can be reduced when it flows along the expansion direction of the conical opening, and the pressure can be increased when it flows against the expansion direction of the conical opening, thereby achieving effective guidance of the airflow flow direction; in addition, since the first conical exhaust channel and the second conical exhaust channel are connected through the annular air cavity, the airflow flows through the airflow path I, the first conical exhaust channel, the annular air cavity, the airflow path II and the second conical exhaust channel in sequence, thereby optimizing the airflow path to reduce convection and impact between each other, reduce vibration and noise, and ensure stable operation of the air bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 A schematic diagram of the overall structure of an easily detachable air bearing provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of a base, an annular air inlet groove and an air injection pipe provided in an embodiment of the present invention;

[0028] Figure 3 An exploded view of the structure of a combined sleeve, a rotor and a rotor sleeve provided in an embodiment of the present invention;

[0029] Figure 4 A cross-sectional view of a combined sleeve provided by an embodiment of the present invention;

[0030] Figure 5 An exploded view of the structure of the rotor, rotor sleeve and stud provided in an embodiment of the present invention;

[0031] Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle;

[0032] Figure 7 A schematic diagram of the structure of a combined shaft sleeve, a plug-in arm and an annular flange provided in an embodiment of the present invention;

[0033] Figure 8 A cross-sectional view of a combined sleeve and a rotor sleeve provided in an embodiment of the present invention Figure 1 ;

[0034] Fig. 9 A cross-sectional view of a rotor and a rotor sleeve provided in an embodiment of the present invention Figure 1 ;

[0035] Fig.10 A cross-sectional view of a combined sleeve and a rotor sleeve provided in an embodiment of the present invention Figure 2 ;

[0036] Fig.11 A cross-sectional view of a rotor and a rotor sleeve provided in an embodiment of the present invention Figure 2 .

[0037] In the figure: 1 bearing base, 11 base, 12 annular air inlet groove, 13 air injection pipe, 21 combined sleeve, 211 plug-in arm, 22 exhaust gap, 23 air flow passage I, 24 sealing ring, 25 annular convex edge, 26 air sealing edge I, 3 rotor, 41 rotor sleeve, 411 stud, 42 air flow passage II, 43 bushing, 44 annular groove, 45 air sealing edge II, 46 multi-corrugated connecting rod. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0039] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0040] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings.

[0044] Embodiment 1:

[0045] like Figure 1 , Figure 3 and Figure 8 As shown, this embodiment provides an easily detachable air-floating bearing, including a bearing base 1, a stator sleeve and a rotor 3; the stator sleeve is detachably fixedly installed in the bearing base 1, and the rotor 3 is rotatably installed in the stator sleeve. An exhaust gap 22 is formed between the inner cylindrical surface of the stator sleeve and the outer cylindrical surface of the rotor 3, and the exhaust gap 22 is annular, and the thickness of the annular exhaust gap 22 is consistent at all locations; a rotor sleeve 41 is fixedly installed in the middle of the outer side of the rotor 3, and the rotor sleeve 41 is located between the two combined sleeves 21.

[0046] like Figure 4 , Figure 7 , Figure 8As shown, a plurality of air flow passages Ⅰ23 are arranged at equal angle intervals in the combined sleeve 21, and the air flow passages Ⅰ23 in the two combined sleeves 21 extend to the two ends of the rotor sleeve 41 respectively, and an air injection pipe 13 connected to the air flow passage Ⅰ23 is arranged on the base 11. In this embodiment, the number of the air injection pipes 13 is consistent with the number of the air flow passages Ⅰ23; an annular air cavity is formed between the inner side surface of the combined sleeve 21, the inner side surface of the plug-in arm 211, the outer side surface of the rotor 3 and the outer side surface of the rotor sleeve 41, and the air flow passage Ⅰ23 is connected to the exhaust gap 22 through the annular air cavity.

[0047] When using the easily removable air-floating bearing of the present application, the purified air is filled into the air injection pipe 13, and the air flow passes through the air flow passage Ⅰ23 and the annular air cavity in turn, and is discharged from the exhaust gap 22. Since the thickness of the annular exhaust gap 22 remains consistent at all locations, the relative position of the rotor 3 between the two combined shaft sleeves 21 remains dynamically constant, so that the rotor 3 and the two combined shaft sleeves 21 will not be in direct contact, thereby avoiding wear and friction and extending the service life of the bearing.

[0048] like Figure 8 and Fig.10 As shown, the corners inside the airflow passage Ⅰ23 are all provided with smooth arc transition angles, which optimize the structure of the airflow passage and avoid affecting the service life of the equipment due to high temperature generated by friction between gas molecules and the inner wall of the airflow passage when the airflow flows rapidly in the right-angle structure of the airflow passage.

[0049] like Figure 3 As shown, the stator sleeve is composed of two combined sleeves 21 spliced ​​in opposite directions, and a plurality of plug-in arms 211 are fixedly installed at equal angles on the side of the combined sleeve 21, and the plug-in arms 211 on the two combined sleeves 21 are plug-connected to each other, and the shoulder on the inner side of the end of the combined sleeve 21 abuts against the end surface of the base 11, and the two combined sleeves 21 are detachably fixedly installed on both sides of the bearing base 1 by fasteners respectively;

[0050] The bearing base 1, the rotor 3, the rotor sleeve 41 and the two combined sleeves 21 constitute the main body of the air bearing of the present application. Compared with the technical solution used in the background technology patent document, the number of internal components of the air bearing is reduced, and the relatively fragmented components are integrated on the combined sleeve 21, so that the internal structure of the air bearing of the present application is compact and the overall effect is good.

[0051] When the air bearing needs to be disassembled, just rotate Figure 1As shown, the fasteners located on the outer side of the combined sleeves 21 can be used to disassemble the two combined sleeves 21 to expose the rotor sleeve 41. At this time, there is a certain operating space between the inner side of the base 11 and the outer side of the rotor sleeve 41, which can be used to inspect and maintain the use of the rotor sleeve 41. Using the above solution, the bearing disassembly process is simplified, the maintenance efficiency is improved, the maintenance time is reduced, and potential operating errors are reduced.

[0052] Embodiment 2:

[0053] The features of this embodiment that are the same as those of the first embodiment are not described in detail. The difference between this embodiment and the first embodiment is that: Figure 3 As shown, in this embodiment, a bushing 43 is detachably installed on the outer side of the rotor sleeve 41. The bushing 43 is made of elastic and wear-resistant materials such as polytetrafluoroethylene or polyurethane that can be purchased on the market. The outer side surface of the rotor sleeve 41 is provided with a concave edge Ⅰ for accommodating the bushing 43 to be embedded and placed.

[0054] When the annular air inlet groove 12 is not filled with gas, the rotor sleeve 41 rests on the upper side of the bottom of the combined sleeve 21 under the influence of the weight of the rotor 3 and the rotor sleeve 41.

[0055] When the air bearing is running, the bushing 43 is used as a buffer between the inner side of the combined sleeve 21 and the outer side of the rotor sleeve 41 to avoid friction damage caused by large-area contact between the combined sleeve 21 and the rotor sleeve 41, thereby increasing the service life of the equipment; when the bushing 43 is severely worn, it is only necessary to pull out the two combined sleeves 21 from both sides of the inside of the base 11, and reach into the base 11 to disassemble and replace the bushing 43, which is easy to operate and has high maintenance efficiency.

[0056] Embodiment three:

[0057] The features of this embodiment that are the same as those of the first embodiment are not described in detail. The difference between this embodiment and the first embodiment is that: Figure 4 and Figure 8 As shown, in this embodiment, annular grooves 44 are respectively provided at both ends of the rotor sleeve 41, and annular ridges 25 that can be plugged into the annular grooves 44 are respectively provided on the two combined sleeves 21, and an air film gap is formed between the annular ridge 25 and the annular groove 44; when the air flow flows through the air film gap, the surface of the annular ridge 25 is separated from the surface of the annular groove 44, so that the annular ridge 25 and the annular groove 44 will not be in direct contact, thereby avoiding wear and friction and extending the service life of the bearing.

[0058] like Figure 7 , Figure 8 and Fig.10As shown, multiple air flow passages Ⅰ23 are divided into two groups, and the ends of the two groups of air flow passages Ⅰ23 respectively pass through the upper and lower sides of the annular convex edge 25, and the two groups of air flow passages Ⅰ23 are staggered; the upper and lower sides of the outer side of the annular convex edge 25 are respectively provided with inclined surfaces Ⅰ, and the upper and lower sides of the inner side of the annular groove 44 are respectively provided with inclined surfaces Ⅱ, and a first conical exhaust channel is formed between inclined surfaces Ⅰ and Ⅱ.

[0059] In the process of the airflow being discharged from the end of the airflow passage Ⅰ23, the airflow exerts an axial driving force on the rotor sleeve 41. At the same time, under the action of the inclined planes Ⅰ and Ⅱ, the airflow can also exert a radial driving force on the rotor sleeve 41. In addition, multiple airflow passages Ⅰ23 are evenly distributed, so that the relative positions of the rotor 3 and the rotor sleeve 41 and the bearing base 1 remain dynamically constant, thereby increasing the operating stability and anti-interference performance of the air bearing.

[0060] In order to maintain smooth airflow inside the equipment, Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, a plurality of airflow passages II42 are arranged at equal angular intervals inside the rotor sleeve 41. The airflow passage II42 extends in a zigzag path and passes through both ends of the rotor sleeve 41. One end of the airflow passage II42 is close to the inner side of the plug-in arm 211, and the other end of the airflow passage II42 is close to the outer side of the rotor 3. Under the action of the airflow passage II42, the airflow in the airflow passage I23 that passes through the end portion and the upper side of the annular convex edge 25 is guided out, thereby maintaining the smooth flow of the airflow inside the equipment and the operating stability of the air bearing.

[0061] like Fig. 9 and Fig.11 As shown, the plurality of air flow passages II 42 are divided into two groups, and the two groups of air flow passages II 42 are arranged opposite to each other, corresponding to the two groups of air flow passages I 23 in the two combined shaft sleeves 21 .

[0062] Embodiment 4:

[0063] The features common to the fourth embodiment are not described in detail here. The difference between the third embodiment and the present embodiment is as follows: Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, in this embodiment, annular edges for extending the path of the airflow passage Ⅱ42 are respectively provided on both sides of the rotor sleeve 41, and a gas sealing edge Ⅱ45 is provided at the end of the annular edge. A gas sealing edge Ⅰ26 is provided on the inner side of the combined sleeve 21 at a position corresponding to the gas sealing edge Ⅱ45, and a second conical exhaust channel is formed between the gas sealing edge Ⅰ26 and the gas sealing edge Ⅱ45, and the first conical exhaust channel and the second conical exhaust channel are connected through the annular air cavity.

[0064] In the present application, the first conical exhaust channel and the second conical exhaust channel are both configured to expand outward along the direction of airflow flow; in this way, the pressure of the airflow can be reduced when it flows along the expansion direction of the conical opening, and the pressure can be increased when it flows against the expansion direction of the conical opening, thereby effectively guiding the flow direction of the airflow; in addition, since the first conical exhaust channel and the second conical exhaust channel are connected through the annular air cavity, the airflow flows through the airflow path I23, the first conical exhaust channel, the annular air cavity, the airflow path II42 and the second conical exhaust channel in sequence, thereby optimizing the airflow path to reduce convection and impact between each other, reduce vibration and noise, and ensure stable operation of the air bearing.

[0065] Embodiment five:

[0066] The features of this embodiment that are the same as those of the first embodiment are not described in detail. The difference between this embodiment and the first embodiment is that: Figure 5 and Figure 6 As shown, in this embodiment, the rotor sleeve 41 is composed of two semi-annular sleeves spliced ​​in opposite directions, the middle part of the rotor 3 is integrally formed with a multi-ribbed shaft rod 46, the semi-annular sleeve is inserted and installed on the side of the multi-ribbed shaft rod 46, and the two semi-annular sleeves are detachably fixed together by at least two studs 411; the studs 411 are inserted between the two semi-annular sleeves in an inclined state to avoid the air flow passage II42 inside the rotor sleeve 41; the bushing 43 is sleeved on the outside of the two semi-annular sleeves to block the mounting hole of the stud 411.

[0067] Compared with the solution in the first embodiment, the above arrangement of this embodiment can reduce the processing and manufacturing cost of the rotor 3, and after the rotor sleeve 41 is worn, the air bearing can be maintained by simply disassembling and replacing the two semi-annular sleeves, which is highly convenient to operate.

[0068] Embodiment six:

[0069] The features of this embodiment that are the same as those of the first embodiment are not described in detail. The difference between this embodiment and the first embodiment is that: Figure 2 As shown, in this embodiment, a plurality of annular air inlet grooves 12 are provided on the inner side surface of the base 11, and the air injection pipe 13 is connected with a plurality of air flow passages Ⅰ23 through the annular air inlet grooves 12 at corresponding positions.

[0070] Compared with the solution in the first embodiment, the above arrangement of this embodiment can significantly reduce the number of gas injection pipes 13 and reduce the equipment processing and manufacturing cost.

[0071] In order to ensure the stability of the connection between the annular air inlet groove 12 and the plurality of air flow passages I 23, as shown in FIG. Figure 3 , Figure 4 and Figure 7As shown, a sealing ring 24 is sleeved and installed on the outer side of the combined sleeve 21, and a recessed edge II is provided on the outer side of the combined sleeve 21, the recessed edge II is used to accommodate the sealing ring 24 to be embedded and placed, and an air hole connected to the air flow passage Ⅰ23 is provided on the sealing ring 24; the sealing ring 24 plays a sealing role, so that the gas pressure at various places inside the annular air inlet groove 12 remains consistent, and the gas in the annular air inlet groove 12 is evenly introduced into multiple air flow passages Ⅰ23, thereby ensuring that the connection state between the annular air inlet groove 12 and multiple air flow passages Ⅰ23 is stable.

[0072] The width of the sealing ring 24 is greater than the width of the annular air inlet groove 12 , thereby further increasing the sealing effect between the annular air inlet groove 12 and the outer side surface of the combined shaft sleeve 21 .

[0073] In the present application, the spacing size at the narrowest point of the air film gap is larger than the spacing size between the outer side surface of the bushing 43 and the inner side surface of the plug-in arm 211. When gas is not filled into the annular air inlet groove 12, the annular protrusion 25 and the annular groove 44 only start to contact after the bushing 43 has produced a certain degree of wear; at this time, since the contact surface between the annular protrusion 25 and the annular groove 44 is relatively small, friction damage caused by large-area contact between the combined sleeve 21 and the rotor sleeve 41 can also be avoided, thereby achieving double protection and further increasing the service life of the equipment.

[0074] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0075] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. An easily disassembled air bearing, comprising a bearing base (1) and a rotor (3), characterized in that: A stator sleeve is detachably fixedly mounted in the bearing base (1), and the rotor (3) is rotatably mounted in the stator sleeve, with an exhaust gap (22) having a uniform wall thickness formed between the inner cylindrical surface of the stator sleeve and the outer cylindrical surface of the rotor (3); The stator shaft sleeve is composed of two combined shaft sleeves (21) connected in opposite directions, a plurality of plug-in arms (211) are fixedly mounted at equal angles on the side of the combined shaft sleeve (21), the plug-in arms (211) on the two combined shaft sleeves (21) are plug-connected to each other, a rotor shaft sleeve (41) is fixedly mounted on the middle of the outer side of the rotor (3), and the rotor shaft sleeve (41) is located between the two combined shaft sleeves (21); A plurality of air flow passages I (23) are arranged at equal angle intervals in the combined sleeve (21), the air flow passages I (23) in the two combined sleeves (21) respectively extending to both ends of the rotor sleeve (41), and an air injection pipe (13) connected to the air flow passages I (23) is arranged on the base (11); An annular air cavity is formed between the inner side surface of the combined shaft sleeve (21), the inner side surface of the plug arm (211), the outer side surface of the rotor (3) and the outer side surface of the rotor shaft sleeve (41), and the air flow passage I (23) is connected to the exhaust gap (22) through the annular air cavity.

2. The easily dismantled air bearing according to claim 1, characterized in that: An annular groove (44) is respectively provided at both ends of the rotor shaft sleeve (41), and an annular ridge (25) capable of being plugged into the annular groove (44) is respectively provided on the two combined shaft sleeves (21), and an air film gap is formed between the annular ridge (25) and the annular groove (44).

3. The easily dismantled air bearing according to claim 2, characterized in that: The plurality of air flow passages I (23) are divided into two groups, the ends of the two groups of air flow passages I (23) respectively penetrate the upper and lower sides of the annular convex edge (25), and the two groups of air flow passages I (23) are arranged in a staggered manner.

4. The easily dismantled air bearing according to claim 3, characterized in that: The annular convex edge (25) is provided with inclined surfaces I on the upper and lower sides of the exterior, and the annular groove (44) is provided with inclined surfaces II on the upper and lower sides of the interior, respectively, and a first conical exhaust passage is formed between inclined surfaces I and II.

5. The easily dismantled air bearing according to claim 4, characterized in that: A plurality of airflow passages II (42) are arranged at equal angular intervals inside the rotor shaft sleeve (41); the airflow passage II (42) extends in a zigzag path and passes through both ends of the rotor shaft sleeve (41); one end of the airflow passage II (42) is close to the inner side surface of the plug arm (211), and the other end of the airflow passage II (42) is close to the outer side surface of the rotor (3).

6. The easily dismantled air bearing according to claim 1, characterized in that: The rotor shaft sleeve (41) is composed of two semi-annular sleeves spliced ​​in opposite directions, the middle part of the rotor (3) is integrally formed with a multi-ribbed shaft rod (46), the semi-annular sleeve is inserted and installed on the side of the multi-ribbed shaft rod (46), and the two semi-annular sleeves are detachably fixedly connected together by at least two studs (411).

7. The easily dismantled air bearing according to claim 1, characterized in that: The inner side surface of the base (11) is provided with a plurality of annular air inlet grooves (12), and the air injection pipe (13) is connected to a plurality of air flow passages I (23) through the annular air inlet grooves (12) at corresponding positions.

8. The easily dismantled air bearing according to claim 6, characterized in that: Bushings (43) are detachably mounted on the outer sides of the two semi-annular sleeves, and the outer sides of the semi-annular sleeves are provided with a concave edge I for accommodating the bushings (43) to be embedded and placed.

9. The easily dismantled air bearing according to claim 7, characterized in that: The outer side of the combined shaft sleeve (21) is sleeved with a sealing ring (24), the outer side surface of the combined shaft sleeve (21) is provided with a concave edge II for accommodating the sealing ring (24) to be embedded and placed, and the sealing ring (24) is provided with an air hole connected to the air flow passage I (23).

10. The easily dismantled air bearing according to claim 9, characterized in that: The width of the sealing ring (24) is greater than the width of the annular air inlet groove (12).

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