Porous medium air bearing with uniform airflow distribution

Abstract

The utility model discloses a porous medium air bearing with uniform air flow distribution, which comprises a bearing seat, a plurality of air flow distribution holes, a plurality of air flow distribution holes and a plurality of air flow distribution holes, the air floatation main shaft is arranged in the air floatation cavity of the bearing seat, and a gap is formed between the air floatation main shaft and the air floatation cavity; an outer annular groove is formed in the outer surface of the air floating main shaft, an inner annular groove is formed in the inner surface of the air floating cavity, the outer annular groove corresponds to the inner annular groove in position, and an air floating structure is arranged between the inner annular groove and the outer annular groove. According to the air floatation structure, the air floatation holes are uniformly distributed in the inner side of the inner annular groove, and the air floatation holes correspond to the pneumatic grooves in position, so that the air floatation structure can realize uniform distribution of airflow; therefore, uniform stress of the air bearing main shaft in the whole operation process is guaranteed, vibration and deviation caused by uneven airflow are reduced, and the overall stability and the operation stability of the air bearing are improved.

Description

Technical Field

[0001] This utility model relates to an air bearing, specifically a porous medium air bearing with uniform airflow distribution. Background Technology

[0002] Air bearings, as crucial support and transmission components in modern mechanical engineering, are widely used in high-speed rotating equipment, aerospace, precision instruments, and high-performance motors. Their main working principle involves forming a stable air film between the shaft and the bearing housing, allowing the shaft to levitate and rotate on this film, thus achieving low friction, low wear, and high-precision operation. Compared to traditional rolling and sliding bearings, air bearings offer higher rotational speeds, longer service life, and superior operational smoothness, making them an indispensable key component in high-end equipment.

[0003] Traditional air bearings often struggle to achieve uniform airflow distribution within the bearing housing, leading to vibration, misalignment, or even malfunctions in the rotating shaft during operation, severely impacting equipment stability and measurement accuracy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a porous medium air bearing with uniform airflow distribution, so as to solve the problems existing in the background art.

[0005] This utility model of a porous medium air-bearing bearing with uniform airflow distribution is achieved through the following technical solutions, including:

[0006] The bearing housing has a hollow interior forming an air flotation cavity;

[0007] An air-bearing main shaft is disposed in the air-bearing cavity of the bearing housing, and there is a gap between the air-bearing main shaft and the air-bearing cavity;

[0008] The outer surface of the air flotation main shaft is provided with an outer annular groove, and the inner surface of the air flotation cavity is provided with an inner annular groove. The outer annular groove and the inner annular groove are positioned correspondingly, and an air flotation structure is provided between the inner annular groove and the outer annular groove.

[0009] As a preferred technical solution, the air flotation structure includes an air supply chamber provided on the bearing housing and a pneumatic groove provided on the air flotation main shaft;

[0010] The inner annular groove is provided with air flotation holes evenly distributed on its inner side, and the air flotation holes are connected to the internal air supply chamber of the bearing seat.

[0011] The air flotation holes correspond to the pneumatic grooves of the air flotation main shaft. Air is blown through the air flotation holes to make the air flotation main shaft in the air supply chamber float and rotate.

[0012] As a preferred technical solution, the pneumatic grooves are evenly arranged on the inner side of the outer ring, and the pneumatic grooves and the outer ring grooves are inclined, with an inclination angle between 5-20°.

[0013] As a preferred technical solution, one end of the bearing housing is provided with an air inlet and the other end is provided with an air outlet. The air supply chamber takes in air through the air inlet chamber and exits air through the air outlet chamber.

[0014] As a preferred technical solution, both ends of the air-bearing main shaft are provided with connecting shafts, and the connecting shafts pass through the sealing holes of the bearing housing.

[0015] As a preferred technical solution, the bottom of the bearing housing is provided with a mounting base, and the mounting base is fixed to the platform.

[0016] The beneficial effects of this utility model are:

[0017] This invention achieves uniform airflow distribution by uniformly distributing air-float holes on the inner side of the inner annular groove and ensuring that these air-float holes correspond to the positions of the pneumatic grooves. This ensures that the air-float main shaft is subjected to uniform force throughout the entire operation, reduces vibration and offset caused by uneven airflow, and improves the overall stability and smooth operation of the air-float bearing.

[0018] The pneumatic grooves of this invention are evenly arranged on the inner side of the outer annular groove and are inclined to the outer annular groove; the airflow guidance and distribution are optimized, and the pneumatic thrust is enhanced by the inclined angle, which effectively drives the rotation of the air-bearing main shaft, making the rotation of the main shaft smoother. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a cross-sectional structural diagram of the air-bearing main shaft of this utility model. Detailed Implementation

[0023] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0024] like Figures 1-3 As shown, the present invention provides a porous medium air-floating bearing with uniform airflow distribution, including a bearing housing 1, wherein the bearing housing 1 has a hollow interior forming an air-floating cavity 3.

[0025] Air-bearing main shaft 2, wherein the air-bearing main shaft 2 is disposed in the air-bearing cavity 3 of the bearing seat 1, and there is a gap between the air-bearing main shaft 2 and the air-bearing cavity 3;

[0026] The outer surface of the air-float main shaft 2 is provided with an outer annular groove 4, and the inner surface of the air-float cavity 3 is provided with an inner annular groove 5. The outer annular groove 4 and the inner annular groove 5 are positioned correspondingly, and an air-float structure is provided between the inner annular groove 5 and the outer annular groove 4.

[0027] The air flotation structure includes an air supply chamber 6 provided on the bearing seat 1 and a pneumatic groove 7 provided on the air flotation main shaft 2.

[0028] The inner annular groove 5 is provided with air flotation holes 12 evenly distributed on its inner side, and the air flotation holes 12 are connected to the internal air supply chamber 6 of the bearing seat 1.

[0029] The air flotation hole 12 corresponds to the pneumatic groove 7 of the air flotation main shaft 2. Air is blown through the air flotation hole to make the air flotation main shaft 2 in the air supply chamber 6 float and rotate.

[0030] In order to drive the air-bearing main shaft to rotate, in this embodiment, the pneumatic grooves 7 are evenly arranged on the inner side of the outer annular groove 4, and the pneumatic grooves 7 and the outer annular groove 4 are inclined, with an inclination angle between 5-20°. When air enters through the air inlet, the gas in the air supply chamber is blown into the pneumatic groove of the outer annular groove through the air-bearing hole. Due to the setting of the inclination angle, the rotation of the main shaft is smoother. An inclination angle between 5-20 degrees can be applied in this embodiment.

[0031] To facilitate air intake and exhaust, in this embodiment, one end of the bearing housing 1 is provided with an air intake hole 8 and the other end is provided with an air outlet hole 9. The air supply chamber 6 takes in air through the air intake chamber and exhausts air through the air outlet chamber.

[0032] To facilitate bearing connection, in this embodiment, both ends of the air-bearing spindle 2 are provided with connecting shafts 10, and the connecting shafts 10 pass through the sealing holes of the bearing housing 1.

[0033] To facilitate bearing fixation, in this embodiment, a mounting base 11 is provided at the bottom of the bearing housing 1, and the mounting base 11 is fixed to the platform.

[0034] This invention achieves uniform airflow distribution by uniformly distributing air-floating holes on the inner side of the inner annular groove and ensuring that these air-floating holes correspond to the positions of the pneumatic groove. This ensures that the air-floating main shaft is subjected to uniform force throughout the entire operation, reduces vibration and offset caused by uneven airflow, and improves the overall stability and smooth operation of the air-floating bearing.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A porous medium air bearing with uniform airflow distribution, characterized in that, include: Bearing housing (1), the bearing housing (1) is hollow to form an air flotation cavity (3); Air-bearing main shaft (2), the air-bearing main shaft (2) is disposed in the air-bearing cavity (3) of the bearing seat (1), and there is a gap between the air-bearing main shaft (2) and the air-bearing cavity (3); The outer surface of the air flotation main shaft (2) is provided with an outer annular groove (4), the inner surface of the air flotation cavity (3) is provided with an inner annular groove (5), and the outer annular groove (4) and the inner annular groove (5) are positioned correspondingly, and an air flotation structure is provided between the inner annular groove (5) and the outer annular groove (4).

2. The porous medium air bearing with uniform airflow distribution according to claim 1, characterized in that: The air flotation structure includes an air supply chamber (6) provided on the bearing seat (1) and a pneumatic groove (7) provided on the air flotation main shaft (2); The inner annular groove (5) is provided with air flotation holes evenly distributed on the inner side, and the air flotation holes are connected to the internal air supply chamber (6) of the bearing seat (1). The air flotation hole corresponds to the pneumatic groove (7) of the air flotation main shaft (2). Air is blown through the air flotation hole to make the air flotation main shaft (2) in the air supply chamber (6) float and rotate.

3. The porous medium air bearing with uniform airflow distribution according to claim 1, characterized in that: The pneumatic groove (7) is evenly arranged on the inner side of the outer annular groove (4), and the pneumatic groove (7) and the outer annular groove (4) are inclined to each other, with an inclination angle between 520°.

4. The porous medium air bearing with uniform airflow distribution according to claim 1, characterized in that: One end of the bearing housing (1) is provided with an air inlet (8) and the other end is provided with an air outlet (9). The air supply chamber (6) receives air through the air inlet chamber and discharges air through the air outlet chamber.

5. The porous medium air bearing with uniform airflow distribution according to claim 1, characterized in that: Both ends of the air-bearing main shaft (2) are provided with connecting shafts (10), and the connecting shafts (10) pass through the sealing holes of the bearing seat (1).

6. The porous medium air bearing with uniform airflow distribution according to claim 1, characterized in that: The bearing housing (1) is provided with a mounting base (11) at its bottom, and the mounting base (11) is fixed on the platform.

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