An air suspension bearing with an axial suspension self-correcting structure

Abstract

The present invention discloses an air suspension bearing with an axial suspension self-correcting structure, including an inner shaft and an outer shaft, a first air hole is distributed in a ring array along the inner circumferential wall of the outer shaft, a first concave ring is opened along the outer circumferential wall of the outer shaft, and the outer outlet of the first air hole is located in the first concave ring; the air suspension bearing also includes a bearing seat and a self-correcting component sleeved on the outer shaft. A second air hole is arranged on the column wall of the bearing seat, and the inner opening of the second air hole is communicated with the first concave ring. The bearing seat and the outer shaft are combined to form an outer shaft component. There are two groups of self-correcting components, which are sleeved on the outer shaft and separated at both ends of the bearing seat. The two groups of self-correcting components form elastic abutment structures with the outer shaft components respectively. The self-correcting components are also provided with air inlet channels. In the two air inlet channels, air pressure difference is formed by injecting gas of different air pressures to correct the position of the self-correcting components. The outer shaft of the present invention is adjustable so that the inner shaft can rotate to obtain better concentricity.

Description

Technical Field

[0001] The invention relates to an air bearing, in particular to an air suspension bearing with an axial suspension self-correcting structure. Background Art

[0002] Air suspension radial bearing is a type of air bearing (also called air floating bearing). Air bearing refers to a sliding bearing that uses gas (usually air, but it may also be other gases) as a lubricant. Air is less viscous than oil, is resistant to high temperatures, and is pollution-free. Therefore, it can be used in high-speed machines, instruments, and radioactive devices, but its load capacity is lower than that of oil. Air bearings are divided into three categories: air static pressure bearings, air dynamic pressure bearings, and squeeze film bearings. In general industry, air static pressure bearings are widely used.

[0003] After searching, it was found that the traditional air suspension bearing does not have a self-correcting structure. The traditional air suspension bearing only has an air intake channel, and the inner shaft and the outer shaft are fixed in position and cannot be adjusted. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an air suspension bearing with an axial suspension self-correcting structure. The purpose of designing the air suspension bearing is to make the outer shaft adjustable so that the inner shaft can rotate to obtain better concentricity.

[0005] In order to solve the above technical problems, the present invention is implemented by the following scheme: an air suspension bearing with an axial suspension self-correcting structure of the present invention comprises an inner shaft and an outer shaft sleeved outside the inner shaft, a plurality of first air holes communicating with each other are distributed in a ring array along the inner circumferential wall of the outer shaft, a first concave circle around the outer circumferential wall is opened along the outer circumferential wall of the outer shaft, and the outer outlet of the first air hole is located in the first concave circle;

[0006] The air suspension bearing also includes:

[0007] A bearing seat sleeved outside the outer shaft, a second air hole is provided on the column wall of the bearing seat, an inner opening of the second air hole is communicated with the first concave ring, and the bearing seat and the outer shaft are combined to form an outer shaft assembly;

[0008] The self-correcting component is provided with two groups. The two groups of self-correcting components are sleeved on the outer shaft and separated at the two ends of the bearing seat. The two groups of self-correcting components respectively form elastic abutment structures with the outer shaft component. The self-correcting component is also provided with an air intake channel. In the two air intake channels, a pressure difference is formed by injecting gas with different pressures to correct the position of the self-correcting component, and then the position of the outer shaft component is corrected by the thrust of the correction component. The two ends of the inner shaft are fixed with a disk body that limits the position of the self-correcting component.

[0009] Furthermore, the bearing seat is a flange structure seat.

[0010] Furthermore, the two groups of self-correcting components and the outer shaft component respectively form elastic abutment structures through springs.

[0011] Furthermore, a plurality of first blind holes are distributed in a circular array at both ends of the outer shaft assembly;

[0012] The self-correcting component includes a "convex" type structural disk, which is sleeved outside the outer shaft with the convex end facing the bearing seat. The convex end annular ring array of the "convex" type structural disk is distributed with second blind holes corresponding to and opposite to the first blind holes in number, and the spring is installed between the first blind hole and the second blind hole.

[0013] Furthermore, the self-correcting assembly further comprises an annular structural strip, and the annular structural strip is sleeved outside the convex portion of the "convex" type structural disc;

[0014] The outer side wall of the convex part of the "convex" type structural disk is provided with a second concave circle, the ring body of the annular structural strip is provided with a third air hole penetrating the inner and outer circles, the inner opening of the third air hole is communicated with the second concave circle, and the third air hole and the second concave circle constitute the air inlet channel;

[0015] The "convex" type structural disk (22) has a side facing away from the annular structural strip (21) with a plurality of fourth air holes (26) distributed in a ring array, one end of the fourth air holes (26) being connected to the second concave ring (23), and the other end thereof facing the disk body.

[0016] Furthermore, the gas includes one of air and inert gas.

[0017] Compared with the prior art, the beneficial effect of the present invention is as follows: the air suspension bearing of the present invention is provided with self-correcting components at both ends of the outer shaft component, and the outer shaft component and the two self-correcting components are elastically abutted. An air inlet channel is provided on the self-correcting component, and a pressure difference is formed by injecting gas of different pressures to correct the position of the self-correcting component, and then the position of the outer shaft component is corrected by the thrust of the correction component. The outer shaft of the present invention is adjustable so that the inner shaft can rotate to obtain better concentricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic structural diagram of the air suspension bearing of the present invention after a part of the components are cut away.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the structure after removing the inner shaft.

[0020] Figure 3 for Figure 2 Exploded diagram.

[0021] Figure 4 It is a schematic diagram of the inner shaft structure of the present invention.

[0022] Figure 5 It is a schematic structural diagram of the self-correcting component of the present invention.

[0023] Figure 6 It is a schematic structural diagram of the outer shaft assembly of the present invention.

[0024] Figure 7 This is a schematic diagram of the position of the second air hole of the present invention.

[0025] Figure 8 This is a schematic diagram of the location of the third air hole of the present invention.

[0026] Fig. 9 This is a schematic diagram of the location of the fourth air hole of the present invention. DETAILED DESCRIPTION

[0027] 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, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the present invention. Obviously, the embodiments described in the present invention are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] 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.

[0029] 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, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Embodiment 1: The specific structure of the present invention is as follows:

[0032] Please refer to the attached Figure 1-9 The present invention provides an air suspension bearing with an axial suspension self-correcting structure, comprising an inner shaft 1 and an outer shaft 5 sleeved outside the inner shaft 1, a plurality of first air holes 51 communicating with each other are distributed in a ring array along the inner circumferential wall of the outer shaft 5, a first concave ring 35 is provided along the outer circumferential wall of the outer shaft 5, and the outer outlet of the first air hole 51 is located in the first concave ring 35;

[0033] The air suspension bearing also includes:

[0034] A bearing seat 3 sleeved outside the outer shaft 5, a second air hole 31 is provided on the column wall of the bearing seat 3, the inner opening of the second air hole 31 is communicated with the first concave ring 35, and the bearing seat 3 and the outer shaft 5 are combined to form an outer shaft assembly;

[0035] The self-correcting component 2 is provided with two groups. The two groups of self-correcting components 2 are sleeved on the outer shaft 5 and separated at the two ends of the bearing seat 3. The two groups of self-correcting components 2 respectively form elastic abutment structures with the outer shaft component. The self-correcting component 2 is also provided with an air intake channel. In the two air intake channels, a pressure difference is formed by injecting gases of different pressures to correct the position of the self-correcting component 2, and then the position of the outer shaft component is corrected by the thrust of the correction component 2. The two ends of the inner shaft 1 are fixed with a disk body for limiting the position of the self-correcting component 2.

[0036] A preferred technical solution of this embodiment: the bearing seat 3 is a flange structure seat.

[0037] A preferred technical solution of this embodiment: the two groups of self-correcting components 2 and the outer shaft component form elastic abutment structures through springs 4.

[0038] A preferred technical solution of this embodiment: a plurality of first blind holes 32 are distributed in a circular array at both ends of the outer shaft assembly;

[0039] The self-correcting component 2 includes a "convex" type structural disk 22, which is sleeved on the outside of the outer shaft 5 with the convex end facing the bearing seat 3. The convex end annular ring array of the "convex" type structural disk 22 is distributed with second blind holes 24 corresponding to and opposite to the first blind holes 32, and the spring 4 is installed between the first blind hole 32 and the second blind hole 24.

[0040] A preferred technical solution of this embodiment: the self-correcting component 2 further includes an annular structural bar 21, and the annular structural bar 21 is sleeved outside the convex part of the "convex" type structural disk 22;

[0041] The outer side wall of the convex part of the "convex" type structural disk 22 is provided with a circle of second concave ring 23, and the ring body of the annular structural strip 21 is provided with a third air hole 25 penetrating the inner and outer circles, and the inner opening of the third air hole 25 is communicated with the second concave ring 23, and the third air hole 25 and the second concave ring 23 constitute the air inlet channel;

[0042] The "convex" type structural disk (22) has a side facing away from the annular structural strip (21) with a plurality of fourth air holes (26) distributed in a ring array, one end of the fourth air holes (26) being connected to the second concave ring (23), and the other end thereof facing the disk body.

[0043] A preferred technical solution of this embodiment: the gas includes air and one of inert gases, and air is mostly used as a lubricant.

[0044] Embodiment 2:

[0045] The following is the correction principle of the air suspension bearing self-correction structure of the present invention:

[0046] like Figure 1-8 As shown, taking air as the injected gas as an example, the air enters the first concave circle 35 from the second air hole 31, and then enters the gap between the inner wall of the outer shaft 5 and the outer wall of the inner shaft 1 through the first air hole 51. After the inner shaft 1 rotates at a high speed, axial suspension is formed, and the inner shaft 1 and the outer shaft 5 do not contact each other, thereby making the friction force generated by the inner shaft 1 and the outer shaft 5 extremely small.

[0047] In order to achieve better concentricity between the inner shaft 1 and the outer shaft 5, self-correcting components 2 are installed on both sides of the outer shaft component. The self-correcting component 2 and the outer shaft component are abutted by a spring.

[0048] After the air enters the second concave ring 23 from the third air hole 25, it is discharged from the fourth air hole 26. Since the air outlet of the fourth air hole 26 faces the disk body, a reverse thrust is generated. The two sets of self-correcting components 2 control the injection speed of the air to control the magnitude of the reverse thrust. The greater the reverse thrust, the outer shaft component moves in the direction of the smaller reverse thrust, thereby achieving the purpose of automatically correcting the coaxiality between the inner shaft 1 and the outer shaft 5.

[0049] The springs 4 on both sides have a buffering effect to avoid rigid contact between the outer shaft component and the self-correcting component 2. The ring array structure composed of multiple springs 4 is coaxial and concentric with the outer shaft 5.

[0050] The first air holes 51 of the present invention are distributed on the middle circumference of the outer shaft 5 in a ring array distribution structure.

[0051] In summary, the air suspension bearing of the present invention is provided with self-correcting components at both ends of the outer shaft component, and the outer shaft component and the two self-correcting components are elastically abutted. An air inlet channel is provided on the self-correcting component, and a pressure difference is formed by injecting gas of different pressures to correct the position of the self-correcting component, and then the position of the outer shaft component is corrected by the thrust of the correction component. The outer shaft of the present invention is adjustable so that the inner shaft can rotate to obtain better concentricity.

[0052] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An air suspension bearing with an axial suspension self-correcting structure, comprising an inner shaft (1) and an outer shaft (5) sleeved outside the inner shaft (1), characterized in that: A plurality of first air holes (51) communicating with each other are arranged in a ring array along the inner circumferential wall of the outer shaft (5); a first concave ring (35) surrounding the outer circumferential wall is provided along the outer circumferential wall of the outer shaft (5); and the outer outlets of the first air holes (51) are located within the first concave ring (35); The air suspension bearing also includes: A bearing seat (3) sleeved outside the outer shaft (5), a second air hole (31) being provided on the cylindrical wall of the bearing seat (3), an inner opening of the second air hole (31) being communicated with the first concave ring (35), and the bearing seat (3) and the outer shaft (5) being combined to form an outer shaft assembly; The self-correcting component (2) is provided with two groups. The two groups of self-correcting components (2) are sleeved on the outer shaft (5) and are located at two ends of the bearing seat (3). The two groups of self-correcting components (2) respectively form elastic abutment structures with the outer shaft component. The self-correcting component (2) is also provided with an air intake channel. In the two air intake channels, a pressure difference is formed by injecting gas with different air pressures to correct the position of the self-correcting component (2), and then the position of the outer shaft component is corrected by the thrust of the correction component (2). The two ends of the inner shaft (1) are fixed with a disk body for limiting the position of the self-correcting component (2); The bearing seat (3) is a flange structure seat; The two groups of self-correcting components (2) respectively form elastic abutment structures with the outer shaft component via springs (4); A plurality of first blind holes (32) are distributed in a circular array at both ends of the outer shaft assembly; The self-correcting component (2) comprises a "convex" type structural disk (22) which is sleeved outside the outer shaft (5) and has a convex end facing the bearing seat (3); a corresponding number of second blind holes (24) and opposite to the first blind holes (32) are distributed in an annular ring array on the convex end of the "convex" type structural disk (22); and the spring (4) is installed between the first blind hole (32) and the second blind hole (24); The self-correcting component (2) further comprises an annular structural strip (21), wherein the annular structural strip (21) is sleeved outside the convex portion of the "convex" type structural disc (22); The outer wall of the convex portion of the "convex" type structural disk (22) is provided with a second concave circle (23); the ring body of the annular structural strip (21) is provided with a third air hole (25) penetrating the inner and outer circles; the inner opening of the third air hole (25) is in communication with the second concave circle (23); The third air hole (25) and the second concave ring (23) form the air intake channel; The "convex" type structural disk (22) has a side facing away from the annular structural strip (21) with a plurality of fourth air holes (26) distributed in a ring array, one end of the fourth air holes (26) being in communication with the second concave ring (23), and the other end thereof facing the disk body.

2. The air suspension bearing with an axial suspension self-correcting structure according to claim 1, characterized in that: The gas includes air and an inert gas.

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