A high-strength radial air suspension bearing

Abstract

The present invention discloses a high-strength radial air suspension bearing, which includes a bearing bracket in a "U" shape structure. The top of the support plate on the left side thereof is provided with a shaft portion. The radial air suspension bearing further includes an upper bearing shell, a lower bearing shell and an inner shaft. One end of the upper bearing shell is sleeved on the shaft portion, and a first air inlet joint is provided at the arc top thereof. The other end of the upper bearing shell is adjustably installed at the top of the support plate on the right side of the bearing bracket. One side of the lower bearing shell is rotatably sleeved on the shaft portion. Its concave surface faces the concave surface of the upper bearing shell, and a cylindrical cavity is formed between the two concave surfaces. A second air inlet joint is provided at the arc top of the lower bearing shell. The other end of the lower bearing shell forms an elastic abutting structure with the upper bearing shell and the support plate on the right side respectively through an elastic structural member. The inner shaft is rotatably arranged in the cylindrical cavity. An elastic abutting structure is arranged between the upper bearing shell and the lower bearing shell of the present invention. The lower bearing shell and the support plate on the right side have an elastic abutting structure. The upper bearing shell and the lower bearing shell restrict each other, strengthening the strength of the upper bearing shell and the lower bearing shell.

Description

Technical Field

[0001] The present invention relates to an air bearing, and more particularly to a high-strength radial air suspension bearing. Background Art

[0002] An air suspension radial bearing is a type of air bearing (also known as an air-floating bearing). An air bearing refers to a sliding bearing that uses a gas (usually air, but it could also be other gases) as a lubricant. Air has a lower viscosity than oil, is heat-resistant, and is pollution-free, so it can be used in high-speed machines, instruments, and radioactive devices. However, its load capacity is lower than that of oil. Air bearings are divided into three categories: aerostatic bearings, aerodynamic bearings, and squeeze-film bearings. In general industry, aerostatic bearings are more widely used.

[0003] Principle of the air suspension bearing: Before starting, there is physical contact between the shaft and the bearing. When starting, the shaft and the bearing move relative to each other to generate air pressure. When the shaft rotates, the air flow (velocity energy) around the shaft is converted into pressure, causing the rotating shaft to rotate on its own. When the shaft reaches a certain rotational speed (3000 - 5000 RPM), the air pressure causes the shaft to float and acts as a lubricant.

[0004] An air suspension bearing requires high-strength structural components to support the high-speed rotation of the inner shaft. While the inner shaft is rotating at high speed, it is necessary to ensure the concentricity between the bearing bush and the inner shaft. Therefore, it is necessary to improve the traditional air bearing. Summary of the Invention

[0005] Aiming at the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a high-strength radial air suspension bearing. The purpose of designing this air suspension bearing is to improve the connection strength of the bearing bush.

[0006] To solve the above technical problem, the present invention is achieved through the following solutions: A high-strength radial air suspension bearing of the present invention includes a bearing bracket, and the bearing bracket is a "U"-shaped structural frame. The top of the support plate on the left side thereof is provided with a shaft portion.

[0007] The radial air suspension bearing further includes:

[0008] An upper bearing bush, one end of which is rotatably sleeved on the shaft portion. The top of its arc is provided with a first air inlet joint that penetrates the inner and outer surfaces of the upper bearing bush. The other end of the upper bearing bush is adjustably installed at the top of the support plate on the right side of the bearing bracket.

[0009] A lower bearing bush, one side of which is rotatably sleeved on the shaft portion. Its concave surface faces the concave surface of the upper bearing bush, and a cylindrical cavity is formed between the two concave surfaces. The top of the arc of the lower bearing bush is provided with a second air inlet joint that penetrates the inner and outer surfaces of the lower bearing bush. The other end of the lower bearing bush forms an elastic abutting structure with the upper bearing bush and the support plate on the right side through elastic structural members respectively.

[0010] The inner shaft is rotatably disposed within the cylindrical cavity.

[0011] Furthermore, the "U"-shaped structure frame includes a seat plate, and support plates vertically mounted on both sides of the upper surface of the seat plate. The shaft portion is mounted at the top end of the left support plate, and the shaft portion is composed of a long bolt and a set screw nut.

[0012] Furthermore, gussets are provided at the angles formed between the seat plate and the two support plates respectively.

[0013] Furthermore, one end of the upper bearing shell, which is connected to the left support plate, has two outwardly protruding sleeves. There is a gap between the two outwardly protruding sleeves, and the two outwardly protruding sleeves are sleeved on the shaft portion.

[0014] Furthermore, one end of the upper bearing shell, which is connected to the right support plate, is connected to a first L-shaped connecting plate, and the inner right-angle surface of the first L-shaped connecting plate faces upward. A first round convex column and a first round hole are respectively provided on the horizontal plane of the inner right-angle surface of the first L-shaped connecting plate;

[0015] A protruding extension plate protrudes outward from the middle of the top end of the right support plate, so that the top end of the right support plate forms a convex structural surface. Second round convex columns are respectively provided at the left and right ends of the convex structural surface, and a second round hole with internal threads is provided on the extension plate of the convex structural surface. The bolt is screwed into the second round hole, passes through the first round hole, and is then fixed by a nut;

[0016] One end of the lower bearing shell, which is away from the rotating end, is connected to two second L-shaped connecting plates, and the inner right-angle surfaces of the two second L-shaped connecting plates face downward. A third round convex column is provided on the horizontal plane of the inner right-angle surface of the second L-shaped connecting plate. A connecting plate is installed between the upper surfaces of the two second L-shaped connecting plates, and a fourth round convex column is provided in the middle of the lower surface of the connecting plate.

[0017] Even further, the first L-shaped connecting plate is located below the connecting plate, the elastic structural member is a spring, and 3 springs are provided. The 3 springs are respectively installed at:

[0018] Between the fourth round convex column and the first round convex column;

[0019] Between the second round convex column and the third round convex column.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The air suspension bearing of the present invention adopts the installation structure of the upper bearing shell and the lower bearing shell, ensuring that the rotation of the inner shaft can be coaxial with the upper bearing shell and the lower bearing shell.

[0021] An elastic abutment structure is provided between the upper bearing and the lower bearing of the present invention, and the lower bearing and the right support plate have an elastic abutment structure. The upper bearing and the lower bearing restrict each other, thereby enhancing the strength of the upper bearing and the lower bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an assembly diagram of the radial air suspension bearing of the present invention.

[0023] Figure 2 It is an exploded view of the radial air suspension bearing of the present invention. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Embodiment 1: The specific structure of the present invention is as follows:

[0029] Please refer to the attached Figure 1-2 , a high-strength radial air suspension bearing of the present invention includes a bearing bracket, and the bearing bracket is a "U"-shaped structural frame. The top of the support plate 2 on the left side thereof is provided with a shaft portion 9;

[0030] The radial air suspension bearing further includes:

[0031] An upper bearing shell 7, one end of which is rotatably sleeved on the shaft portion 9, and the top of its arc is provided with a first air inlet joint 8 penetrating through the inner and outer surfaces of the upper bearing shell 7. The other end of the upper bearing shell 7 is adjustably installed at the top of the support plate 2 on the right side of the bearing bracket;

[0032] A lower bearing shell 4, one side of which is rotatably sleeved on the shaft portion 9, and its concave surface is opposite to that of the upper bearing shell 7, and a cylindrical cavity is formed between the two concave surfaces. The top of the arc of the lower bearing shell 4 is provided with a second air inlet joint 11 penetrating through the inner and outer surfaces of the lower bearing shell 4. The other end of the lower bearing shell 4 forms an elastic abutting structure with the upper bearing shell 7 and the support plate 2 on the right side respectively through an elastic structural member;

[0033] An inner shaft 12, which is rotatably arranged in the cylindrical cavity.

[0034] A preferred technical solution of this embodiment: The "U"-shaped structural frame includes a seat plate 1 and support plates 2 vertically installed on both sides of the upper plate surface of the seat plate 1. The shaft portion 9 is installed at the top of the left support plate 2, and the shaft portion 9 is composed of a long bolt and a set screw nut.

[0035] A preferred technical solution of this embodiment: Angle braces 10 are provided at the angles formed between the seat plate 1 and the two support plates 2 respectively.

[0036] A preferred technical solution of this embodiment: For the upper bearing shell 7, one end thereof connected to the left support plate 2 has two outer convex sleeves 71. There is a gap between the two outer convex sleeves 71, and the two outer convex sleeves 71 are sleeved on the shaft portion 9. For the lower bearing shell 4, one end thereof connected to the shaft portion 9 has an outer convex sleeve column 41, and the outer convex sleeve column 41 is arranged in the gap between the two outer convex sleeves 71.

[0037] A preferred technical solution of this embodiment: For the upper bearing shell 7, one end thereof connected to the right support plate 2 is connected with a first L-shaped connecting plate 5, and the inner right angle surface of the first L-shaped connecting plate 5 faces upward. On the horizontal plane of the inner right angle surface of the first L-shaped connecting plate 5, a first round convex column 51 and a first round hole 52 are respectively arranged;

[0038] An extension plate protrudes outward from the middle of the top end of the right support plate 2 so that the top end of the right support plate 2 forms a convex structural surface, and second round convex columns are respectively provided at the left and right ends of the convex structural surface, and a second circular hole with an internal thread is provided on the extension plate of the convex structural surface, and the bolt 3 is screwed into the second circular hole, passes through the first circular hole 52, and is then fixed by a nut;

[0039] The lower bearing 4, at its end away from the rotating end, is connected to two second L-shaped connecting plates 14 with the inner right-angled surfaces of the two second L-shaped connecting plates 14 facing downward, a third circular boss is arranged on the horizontal plane of the inner right-angled surface of the second L-shaped connecting plate 14, a connecting plate 13 is installed between the upper plate surfaces of the two second L-shaped connecting plates 14, and a fourth circular boss 131 is arranged in the middle of the lower plate surface of the connecting plate 13.

[0040] A preferred technical solution of this embodiment: the first L-shaped connecting plate 5 is located below the connecting plate 13, the elastic structural member is a spring 6, and the spring 6 is provided with three springs, and the three springs 6 are respectively installed at:

[0041] between the fourth round protrusion 131 and the first round protrusion 51;

[0042] between the second circular convex column and the third circular convex column.

[0043] Embodiment 2:

[0044] like Figure 1-2 As shown, before the inner shaft 12 of the radial air suspension bearing of the present invention works, air is first input from the first air inlet joint 8 and the second air inlet joint 11, and the air enters the gap between the upper bearing bush 7, the lower bearing bush 4 and the inner shaft 12. The inner shaft 12 rotates at a high speed to form a suspension structure, and the strong airflow generated by the high-speed rotation of the inner shaft 12 spreads the upper bearing bush 7 and the lower bearing bush 4 at an angle. At this time, the inner shaft 12 and the upper bearing bush 7 and the lower bearing bush 4 do not generate friction, thereby generating very little heat.

[0045] The greater the strong airflow, the tighter the three springs 6 are compressed. The three springs 6 increase the stability of the entire radial air suspension bearing and have a good shock absorption effect. Especially in the starting stage of the inner shaft 12, the shock absorption effect of the three springs 6 is very obvious.

[0046] Embodiment 3:

[0047] like Figure 1-2 As shown, the first L-shaped connecting plate (5) on the upper bearing shell 7 moves on the rod body of the bolt 3, and the movable range of the first L-shaped connecting plate (5) is adjusted by adjusting the height of the nut.

[0048] In summary, the air suspension bearing of the present invention adopts the installation structure of the upper bearing bush 7 and the lower bearing bush 4 to ensure that the rotation of the inner shaft 1 can be coaxial with the upper bearing bush 7 and the lower bearing bush 4. An elastic abutment structure is provided between the upper bearing bush 7 and the lower bearing bush 4 of the present invention, and the lower bearing bush 4 and the right support plate 2 have an elastic abutment structure, and the upper bearing bush 7 and the lower bearing bush 4 restrict each other, thereby strengthening the strength of the upper bearing bush 7 and the lower bearing bush 4.

[0049] 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. A high-strength radial air suspension bearing, comprising a bearing bracket, characterized in that: The bearing support is a "U"-shaped structural frame, and the top of the support plate (2) on the left side thereof is provided with a shaft portion (9); The radial air suspension bearing further includes: an upper bearing shell (7), one end of which is rotatably sleeved on the shaft portion (9), and the top of the arc of which is provided with a first air inlet joint (8) penetrating through the inner and outer surfaces of the upper bearing shell (7), and the other end of the upper bearing shell (7) is adjustably installed at the top of the support plate (2) on the right side of the bearing support; a lower bearing shell (4), one side of which is rotatably sleeved on the shaft portion (9), and the concave surface of which faces the concave surface of the upper bearing shell (7) and a cylindrical cavity is formed between the two concave surfaces, and the top of the arc of the lower bearing shell (4) is provided with a second air inlet joint (11) penetrating through the inner and outer surfaces of the lower bearing shell (4), and the other end of the lower bearing shell (4) forms an elastic abutting structure with the upper bearing shell (7) and the support plate (2) on the right side respectively through an elastic structural member; an inner shaft (12), which is rotatably arranged in the cylindrical cavity; The "U"-shaped structural frame includes a seat plate (1) and support plates (2) vertically installed on both sides of the upper plate surface of the seat plate (1), and the shaft portion (9) is installed at the top of the support plate (2) on the left side, and the shaft portion (9) is composed of a long bolt and a set screw nut; For the upper bearing shell (7), one end thereof connected to the support plate (2) on the right side is connected with a first L-shaped connecting plate (5) and the inner right-angle surface of the first L-shaped connecting plate (5) faces upward, and a first round convex column (51) and a first round hole (52) are respectively arranged on the horizontal plane of the inner right-angle surface of the first L-shaped connecting plate (5); In the middle of the top of the support plate (2) on the right side, an extension plate protrudes outwards so that the top of the support plate (2) on the right side forms a convex structural surface, second round convex columns are respectively arranged at the left and right ends of the convex structural surface, and a second round hole with an internal thread is arranged on the extension plate of the convex structural surface, and a bolt (3) is screwed into the second round hole, passes through the first round hole (52), and is then fixed by a nut; For the lower bearing shell (4), two second L-shaped connecting plates (14) are connected to the end far from the rotating end, and the inner right-angle surfaces of the two second L-shaped connecting plates (14) face downward, and a third round convex column is arranged on the horizontal plane of the inner right-angle surface of the second L-shaped connecting plate (14), and a connecting plate (13) is installed between the upper plate surfaces of the two second L-shaped connecting plates (14), and a fourth round convex column (131) is arranged in the middle of the lower plate surface of the connecting plate (13); 2. A high-strength radial air suspension bearing according to claim 1, characterized in that: Angle braces (10) are arranged at the angles formed between the seat plate (1) and the two support plates (2) respectively; 3. A high-strength radial air suspension bearing according to claim 1, characterized in that: For the upper bearing shell (7), the end thereof connected to the support plate (2) on the left side has two outer convex sleeves (71), there is a gap between the two outer convex sleeves (71), and the two outer convex sleeves (71) are sleeved on the shaft portion (9); 4. A high-strength radial air suspension bearing according to claim 1, characterized in that: The first L-shaped connecting plate (5) is located below the connecting plate (13), the elastic structural member is a spring (6), and 3 springs (6) are provided, and the 3 springs (6) are respectively installed at: between the fourth round convex column (131) and the first round convex column (51); between the second round convex column and the third round convex column.

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