An air thrust bearing structure capable of automatically adjusting positioning accuracy

Abstract

The present invention discloses an air thrust bearing structure capable of automatically adjusting positioning accuracy, comprising two thrust turntables that are coaxially butted and have a first gap between the disk bodies, two chucks clamped on both sides of the two thrust turntables, and a position sensor for sensing the positions of the two chucks. The disk body of the thrust turntable is provided with a plurality of rotating air pressure holes that penetrate through both sides of the disk body, and a plurality of rotating air pressure hole ring arrays are distributed on the disk body; the outer circumferences of the two chucks are connected by a cylinder, and the two chucks are provided with air holes that penetrate through both sides of the chucks, and the air holes, the orifices of which are away from the thrust turntable, are connected with a pressure relief air pipe, and an electromagnetic control regulating switch is installed on each pressure relief air pipe; the position sensor is installed between the two chucks and is arranged outside the outer circumferences of the two thrust turntables. The air thrust bearing structure of the present invention can automatically adjust the position of the thrust turntable and improve the service life of the air thrust bearing.

Description

Technical Field

[0001] The invention relates to an air bearing, in particular to an air thrust bearing structure capable of automatically adjusting positioning accuracy. 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] The principle of air suspension bearings: There is physical contact between the shaft and the bearing before starting. During startup, the shaft and the bearing move relative to each other to generate air pressure. When the shaft rotates, the air flow (speed energy) around the shaft is converted into pressure, causing the rotating shaft to rotate. When the shaft reaches a certain rotation speed (3000-5000RPM), the air pressure makes the shaft float and plays a lubricating role.

[0004] The thrust turntable position of the conventional air bearing is not provided with an adjustable structure. When the entire air bearing is installed, the turntable position is fixed and cannot be adjusted.

[0005] Therefore, it is necessary to improve the traditional air bearings. Summary of the invention

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an air thrust bearing structure that automatically adjusts the positioning accuracy. The purpose of designing the air thrust bearing structure is to achieve adjustable position of the turntable.

[0007] In order to solve the above technical problems, the present invention is implemented by the following scheme: An air thrust bearing structure for automatically adjusting positioning accuracy of the present invention comprises:

[0008] Two thrust turntables are coaxially butted with a first gap between the turntable bodies, wherein the turntable bodies are provided with a plurality of rotating air pressure holes penetrating through two sides of the turntable bodies, and the plurality of rotating air pressure holes are distributed in a ring array on the turntable bodies;

[0009] Two chucks are clamped on both sides of the two thrust turntables, the outer circumferences of the two chucks are connected by a cylinder, and the two chucks are provided with air holes that penetrate through both sides of the chucks, and the air holes are connected to pressure relief air pipes at one end of the holes away from the thrust turntable, and electromagnetic control adjustment switches are installed on each pressure relief air pipe;

[0010] A position sensor for sensing the positions of the two chucks is installed between the two chucks and arranged outside the outer circumferences of the two thrust turntables.

[0011] Furthermore, a second gap is left between the two thrust turntables and the two chucks.

[0012] Furthermore, the opposite sides of the two thrust turntables are each provided with a first annular groove, and the plurality of rotating wind pressure hole ring arrays are distributed in the first annular groove.

[0013] Furthermore, the inner ring and the outer ring of the first ring groove are both chamfered.

[0014] Furthermore, the air holes on the two chucks are coaxial air holes.

[0015] Furthermore, an outer convex ring is provided at the center of the opposite back surfaces of the two thrust turntables, and the shaft rings in the middle of the two chucks are sleeved outside the outer convex ring.

[0016] Furthermore, the two chucks have a second annular groove on one side facing the two thrust turntables, and the inner annular convex strips and the outer annular convex strips of the second annular groove are both chamfered.

[0017] Furthermore, a through hole is provided in the length direction of the cylinder, and a bolt is passed through the through hole.

[0018] Furthermore, the pores are oblique holes.

[0019] Compared with the prior art, the beneficial effect of the present invention is that the air thrust bearing structure of the present invention can automatically adjust the position of the thrust turntable.

[0020] When the two thrust turntables rotate at high speed, air pressure will be formed between the two chucks respectively. When the two thrust turntables deviate, the air pressure on both sides of the two thrust turntables will form a pressure difference by adjusting the air outlet size of the two pressure relief air pipes, so that the two thrust turntables move toward the side with smaller air pressure. When reaching the preset position, the air pressure balance on both sides of the two thrust turntables is restored by adjusting the air outlet size of the two pressure relief air pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the air thrust bearing of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the chuck of the present invention.

[0023] Figure 3 It is a schematic diagram of the installation structure of two turntables of the present invention.

[0024] Figure 4 This is an enlarged view of a turntable structure of the present invention. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Embodiment 1: The specific structure of the present invention is as follows:

[0030] Please refer to the attached Figure 1-4 The present invention provides an air thrust bearing structure capable of automatically adjusting positioning accuracy, comprising:

[0031] Two thrust turntables 2 are coaxially butt-jointed and have a first gap between the turntables. The turntables 2 are provided with a plurality of rotating air pressure holes 21 penetrating through both sides of the turntables. The plurality of rotating air pressure holes 21 are distributed in a ring array on the turntables.

[0032] Two chucks 1 are clamped on both sides of the two thrust turntables 2, the outer circumferences of the two chucks 1 are connected by a cylinder 4, and the two chucks 1 are provided with air holes 112 that penetrate through both sides of the chucks 1. The air holes 112 are connected to a pressure relief air pipe 3 at one end away from the thrust turntable 2, and an electromagnetic control adjustment switch 6 is installed on each pressure relief air pipe 3;

[0033] A position sensor 7 for sensing the positions of the two chucks 1 is installed between the two chucks 1 and disposed outside the outer circumference of the two thrust turntables 2 .

[0034] A preferred technical solution of this embodiment is that a second gap is left between the two thrust turntables 2 and the two chuck plates 1 .

[0035] A preferred technical solution of this embodiment: the opposite back surfaces of the two thrust turntables 2 are both provided with a first annular groove, and the plurality of rotating wind pressure holes 21 are distributed in a ring array in the first annular groove.

[0036] A preferred technical solution of this embodiment: both the inner ring and the outer ring of the first ring groove are chamfered.

[0037] A preferred technical solution of this embodiment: the air holes 112 on the two chucks 1 are coaxial air holes.

[0038] A preferred technical solution of this embodiment: an outer convex ring is provided at the center of the opposite back surfaces of the two thrust turntables 2, and the shaft ring 12 in the middle of the two chucks 1 is sleeved outside the outer convex ring.

[0039] A preferred technical solution of this embodiment: the two chucks 1 have a second annular groove 11 on one side facing the two thrust turntables 2, and the inner annular convex strip 111 and the outer annular convex strip of the second annular groove 11 are both chamfered.

[0040] A preferred technical solution of this embodiment: a through hole is provided in the length direction of the cylinder 4, and a bolt 5 is passed through the through hole.

[0041] A preferred technical solution of this embodiment: the air hole 112 is an inclined hole.

[0042] Embodiment 2:

[0043] like Figure 1-4 As shown, the following is the principle of the air thrust bearing structure of the present invention to automatically adjust the position of the thrust turntable:

[0044] When the air thrust bearing of the present invention is started, the two thrust turntables 2 make adjustment rotational motion. When the two thrust turntables 2 rotate at high speed, high-speed airflow will be generated on both sides to form air compression, and the high-speed airflow will form a pressure zone between the two thrust turntables 2 and the two chucks 1. The pressure reacts on the two thrust turntables 2 to form a strong axial pressure on the shaft, which is much higher than that of the traditional axial thrust bearing. When the two thrust turntables 2 are not offset, the air pressure in the pressure zone at the second gap on both sides will be balanced.

[0045] When the position sensor 7 detects that the two thrust turntables 2 are offset, it will send an offset signal to the control system of the air thrust bearing. The control system receives the offset signal and determines which side has a larger offset distance. Then the control system controls the electromagnetic control adjustment switch 6 on the side where the second gap becomes larger to open, and the pressure relief air pipe 3 of the opened electromagnetic control adjustment switch 6 exhausts and releases pressure. At this time, the second gaps on both sides form a negative pressure difference, and the side with higher air pressure will generate thrust on the two thrust turntables 2, and the two thrust turntables 2 move toward the side with lower air pressure. When the two thrust turntables 2 reach the non-offset position, the position sensor 7 will detect and generate a non-offset signal to the control system, and the control system controls the opened electromagnetic control adjustment switch 6 to close. At this time, the air pressure on both sides of the two thrust turntables 2 is restored to balance.

[0046] In summary, the air thrust bearing structure of the present invention can automatically adjust the position of the thrust turntable. When the two thrust turntables rotate at high speed, air pressure will be formed between the two clamping plates respectively. When the two thrust turntables deviate, the air pressure on both sides of the two thrust turntables will form a pressure difference by adjusting the air outlet size of the two pressure relief air pipes, thereby causing the two thrust turntables to move toward the side with smaller air pressure. When reaching the preset position, the air pressure balance on both sides of the two thrust turntables is restored by adjusting the air outlet size of the two pressure relief air pipes.

[0047] 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 thrust bearing structure capable of automatically adjusting positioning accuracy, characterized in that: include: Two thrust rotating discs (2) are coaxially butt-jointed and have a first gap between the disc bodies, wherein the disc bodies of the thrust rotating discs (2) are provided with a plurality of rotating air pressure holes (21) penetrating through two surfaces of the disc bodies, and the plurality of rotating air pressure holes (21) are distributed in a ring array on the disc bodies; Two chucks (1) are clamped on both sides of the two thrust turntables (2), the outer circumferences of the two chucks (1) are connected via a cylinder (4), the two chucks (1) are provided with air holes (112) penetrating through both sides of the chucks (1), the air holes (112) are connected to pressure relief air pipes (3) at one end of the opening away from the thrust turntable (2), and an electromagnetic control adjustment switch (6) is installed on each pressure relief air pipe (3); A position sensor (7) for sensing the position of the two chucks (1), the position sensor (7) being installed between the two chucks (1) and arranged outside the outer circumference of the two thrust turntables (2); The two thrust rotating discs (2) are both provided with a first annular groove on their opposite sides, and the plurality of rotating wind pressure holes (21) are distributed in a ring array in the first annular groove; The two chucks (1) have a second annular groove (11) on one side facing the two thrust rotating discs (2), and the inner annular convex strip (111) and the outer annular convex strip of the second annular groove (11) are both chamfered.

2. The air thrust bearing structure capable of automatically adjusting positioning accuracy according to claim 1, characterized in that: A second gap is left between the two thrust turntables (2) and the two clamping plates (1).

3. The air thrust bearing structure capable of automatically adjusting positioning accuracy according to claim 1, characterized in that: The inner ring and the outer ring of the first ring groove are both chamfered.

4. The air thrust bearing structure capable of automatically adjusting positioning accuracy according to claim 1, characterized in that: The air holes (112) on the two chucks (1) are coaxial air holes.

5. The air thrust bearing structure capable of automatically adjusting positioning accuracy according to claim 1, characterized in that: An outer convex ring is provided at the center of the opposite back surfaces of the two thrust rotating disks (2), and the shaft ring (12) in the middle of the two chucks (1) is sleeved outside the outer convex ring.

6. The air thrust bearing structure capable of automatically adjusting positioning accuracy according to claim 1, characterized in that: A through hole is provided in the length direction of the cylinder (4), and a bolt (5) is passed through the through hole.

7. The air thrust bearing structure capable of automatically adjusting positioning accuracy according to claim 1, characterized in that: The air holes (112) are oblique holes.

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