Radial static pressure gas bearing adopting multi-micropore integrated structure

Abstract

The utility model discloses a radial static pressure gas bearing adopting a multi-micropore integrated structure, which relates to the technical field of mechanical engineering and comprises a shell, a bearing sleeve is fixedly connected in the shell, and two O-shaped rings are arranged at two ends of the bearing sleeve. External high-pressure gas enters the circumferential gas supply channel of the bearing through the gas nozzle connector, due to the fact that the circumferential gas supply channel and the axial gas supply channel are connected in a penetrating mode, the high-pressure gas can flow to each throttling structure, the throttling structures enable all the micropores to have the same diameter, and no matter how the number of the micropores changes, the diameter of the micropores can be adjusted. The total sum of the cross sectional areas of all micropores in the throttling structure is kept unchanged, so that the bearing can be kept stable under different loads, and the whole static pressure gas bearing realizes uniform supply and stable distribution of high-pressure gas through the throttling structure of the multi-micropore integrated structure and mutual matching of the circumferential gas supply channel and the axial gas supply channel.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, in particular to a radial static pressure gas bearing adopting a multi-microporous integrated structure. Background Art

[0002] Hydrostatic gas bearings are key components of ultra-precision and ultra-high-speed rotating machinery. They are widely used in ultra-high-speed and ultra-precision machining due to their advantages such as low friction power consumption, no pollution, high speed and operating accuracy. With the development of ultra-high-speed and ultra-precision machining technology, higher requirements are placed on the load-bearing, stiffness and stability of hydrostatic gas bearings. Due to the compressibility of gas, the load-bearing capacity and stiffness of hydrostatic gas bearings are relatively small. Therefore, improving the load-bearing capacity, height and stability of hydrostatic gas bearings has become a key research issue for current researchers.

[0003] The existing hydrostatic gas bearings improve the bearing capacity and stiffness by adjusting the air supply pressure through air film pressure feedback and opening pressure equalizing grooves. Although both methods can improve the performance of the bearing, the former has a complex structure and is difficult to process. Although the latter has a relatively simple structure, a high-pressure cyclone will be formed in the pressure equalizing groove, causing self-excited vibration of the air hammer, which does not meet the stability requirements under ultra-high-speed operation. In view of the above problems, a radial hydrostatic gas bearing with a multi-microporous integrated structure is proposed. Summary of the invention

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a radial static pressure gas bearing adopting a multi-microporous integrated structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a radial static pressure gas bearing adopting a multi-microporous integrated structure, comprising an outer shell, a bearing sleeve fixedly connected to the inside of the outer shell, two O-rings at both ends of the bearing sleeve, a group of annular grooves at the center of the bearing sleeve, an axial groove extending through the annular groove, four groups of throttling structures are arranged in the annular groove, and the annular groove and the axial groove cooperate with each other to form an axial air supply channel.

[0006] As mentioned above, the circumferential air supply channels are fixedly connected to both sides of the axial air supply channel, and an air nozzle joint is provided inside the top of the shell.

[0007] As mentioned above, an end cover is fixedly connected to the outer wall of one side of the shell, and a screw is fixedly connected to the inner side of the end cover.

[0008] As mentioned above, micropores are arranged inside the throttling structure, and the throttling structure is composed of a plurality of micropores.

[0009] As mentioned above, the air nozzle joint is opened along the radial direction of the housing, and one end of the air nozzle joint outlet is located in the middle of the annular groove on the bearing sleeve.

[0010] As mentioned above, the axial grooves are evenly distributed in four circumferential directions about the annular groove, and the axial grooves and the annular grooves are perpendicular to each other.

[0011] As mentioned above, the throttling structures are evenly distributed about the annular groove.

[0012] As mentioned above, the circumferential air supply channel is symmetrically distributed on both sides of the axial air supply channel, and the circumferential air supply channel is connected to the axial air supply channel through.

[0013] As mentioned above, the inner surface of one side of the end cover is tightly fitted with the outer surface of one side of the housing and the bearing sleeve, and the end cover is fixed to the housing and the bearing sleeve by screws.

[0014] As mentioned above, the diameter of each micropore is the same, the micropores are distributed in a ring shape, the number of micropores is between 4-8, and the micropores are evenly distributed on a circle with a radius of R. When the number of micropores changes, the total cross-sectional area of ​​all micropores in the throttling structure remains unchanged.

[0015] Compared with the prior art, the radial static pressure gas bearing adopting the multi-microporous integrated structure has the following beneficial effects:

[0016] 1. When the utility model starts working, external high-pressure gas enters the circumferential air supply channel of the bearing through the air nozzle joint. Since the circumferential air supply channel and the axial air supply channel are connected through, the high-pressure gas can flow to each throttling structure. The throttling structure makes each micropore have the same diameter, and the number of micropores is between 4 and 8. These micropores are evenly distributed on a circle with a radius of R. No matter how the number of micropores changes, the sum of the cross-sectional areas of all micropores in the throttling structure remains unchanged, which ensures that the bearing can remain stable under different loads;

[0017] Second, the high-pressure gas of the utility model flows into the inner surface of the static pressure gas bearing through the micropores in the throttling structure, forming a uniform and stable high-pressure gas film. This gas film provides effective support for the rotor, so that the rotor can run smoothly in the bearing, reducing friction and wear, and increasing the service life of the bearing. At the same time, due to the existence of the gas film, the rigidity and damping characteristics of the bearing are also enhanced, making the bearing more stable and reliable when subjected to impact and vibration;

[0018] 3. The O-rings of the utility model are installed in the installation grooves on the bearing sleeve. After the bearing sleeve and the outer shell are installed together, they seal the gas inside the bearing, effectively preventing the leakage of high-pressure gas, and ensuring that the bearing can maintain stable gas pressure and flow during operation, thereby ensuring the stability and reliability of the bearing. The entire static pressure gas bearing realizes the uniform supply and stable distribution of high-pressure gas through the throttling structure of the multi-microporous integrated structure and the mutual cooperation of the circumferential air supply channel and the axial air supply channel, which not only improves the bearing's load-bearing capacity and stability, but also reduces friction loss and maintenance costs, providing strong support for various high-precision, high-speed, and high-reliability mechanical equipment.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the radial static pressure gas bearing adopting a multi-microporous integrated structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the transverse cross-section structure of the radial static pressure gas bearing adopting a multi-microporous integrated structure of the utility model;

[0022] Figure 3 It is a schematic diagram of a half-section structure of a radial static pressure gas bearing adopting a multi-microporous integrated structure according to the utility model;

[0023] Figure 4 The utility model adopts a radial static pressure gas bearing with a multi-microporous integrated structure Figure 3 Schematic diagram of the structure at point A in the middle.

[0024] Figure 5 The utility model adopts a radial static pressure gas bearing with a multi-microporous integrated structure Figure 3 Schematic diagram of the structure at point B in the middle.

[0025] In the figure: 1. outer shell; 2. bearing sleeve; 3. O-ring; 301. annular groove; 302. axial groove; 303. throttling structure; 4. end cover; 5. screw; 6. air nozzle joint; 7. axial air supply channel; 8. circumferential air supply channel; 9. micropore. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-5 As shown, the utility model provides a technical solution: a radial static pressure gas bearing adopting a multi-microporous integrated structure, including an outer shell 1, a bearing sleeve 2 is fixedly connected inside the outer shell 1, two O-rings 3 are provided at both ends of the bearing sleeve 2, a group of annular grooves 301 are provided at the center of the bearing sleeve 2, and axial grooves 302 are penetrated and connected around the annular groove 301, four groups of throttling structures 303 are arranged in the annular groove 301, the annular groove 301 and the axial groove 302 cooperate with each other to form an axial air supply channel 7, and circumferential air supply channels 8 are fixedly connected on both sides of the axial air supply channel 7, a gas nozzle joint 6 is provided inside the upper top of the outer shell 1, an end cover 4 is fixedly connected to the outer wall of one side of the outer shell 1, and a screw 5 is fixedly connected to the inner side of the end cover 4, and micropores 9 are arranged inside the throttling structure 303, and the throttling structure 303 is composed of a plurality of micropores 9.

[0028] According to the overall structure of the device, external high-pressure gas enters the circumferential air supply channel 8 of the bearing through the air nozzle joint 6. Since the circumferential air supply channel 8 and the axial air supply channel 7 are connected through, the high-pressure gas can flow to each throttling structure 303. The throttling structure 303 makes each micropore 9 have the same diameter, and the number of micropores 9 is between 4 and 8. These micropores 9 are evenly distributed on a circle with a radius of R. No matter how the number of micropores 9 changes, the sum of the cross-sectional areas of all micropores 9 in the throttling structure 303 remains unchanged, which ensures that the bearing can remain stable under different loads. The entire static pressure gas bearing realizes the uniform supply and stable distribution of high-pressure gas through the throttling structure 303 with an integrated structure of multiple micropores 9 and the mutual cooperation of the circumferential air supply channel 8 and the axial air supply channel 7, which not only improves the bearing's load-bearing capacity and stability, but also reduces friction loss and maintenance costs, providing strong support for various high-precision, high-speed, and high-reliability mechanical equipment.

[0029] like Figure 1-5 As shown, the air nozzle joint 6 is radially opened along the outer shell 1, and one end of the air nozzle joint 6 outlet is located in the middle of the annular groove 301 on the bearing sleeve 2, the axial groove 302 is evenly distributed in four circumferential directions about the annular groove 301, the axial groove 302 and the annular groove 301 are perpendicular to each other, and the throttling structure 303 is evenly distributed about the annular groove 301.

[0030] High-pressure gas flows into the inner surface of the static gas bearing through the micropores 9 in the throttling structure 303, forming a uniform and stable high-pressure gas film. This gas film provides effective support for the rotor, allowing the rotor to run smoothly in the bearing, reducing friction and wear, and increasing the service life of the bearing. At the same time, due to the existence of the gas film, the rigidity and damping characteristics of the bearing are also enhanced, making the bearing more stable and reliable when subjected to impact and vibration. The O-rings 3 are installed in the mounting grooves on the bearing sleeve 2. After the bearing sleeve 2 and the housing 1 are installed together, they seal the gas inside the bearing, effectively preventing the leakage of high-pressure gas, and ensuring that the bearing can maintain a stable gas pressure and flow during operation, thereby ensuring the stability and reliability of the bearing.

[0031] like Figure 1-5 As shown, the circumferential air supply channel 8 is symmetrically distributed on both sides of the axial air supply channel 7, the circumferential air supply channel 8 is connected to the axial air supply channel 7 through a through hole, the inner surface of one side of the end cover 4 is tightly fitted with the outer surface of one side of the outer shell 1 and the bearing sleeve 2, and the end cover 4 is fixed to the outer shell 1 and the bearing sleeve 2 through screws 5. The diameter of each micropore 9 is the same, and the micropores 9 are distributed in a ring shape. The number of micropores 9 is between 4 and 8, and the micropores 9 are evenly distributed on a circle with a radius of R. When the number of micropores 9 changes, the total cross-sectional area of ​​all micropores 9 in the throttling structure 303 remains unchanged.

[0032] When the static pressure gas bearing starts to work, the external high-pressure gas enters the circumferential gas supply channel 8 of the bearing through the gas nozzle joint 6. Since the circumferential gas supply channel 8 is connected to the axial gas supply channel 7 through penetration, the high-pressure gas can flow to each throttling structure 303. The throttling structure 303 makes each micropore 9 have the same diameter, and the number of micropores 9 is between 4 and 8. These micropores 9 are evenly distributed on a circle with a radius of R. No matter how the number of micropores 9 changes, the sum of the cross-sectional areas of all micropores 9 in the throttling structure 303 remains unchanged, which ensures that the bearing can remain stable under different loads. The high-pressure gas flows into the static pressure gas shaft through the micropores 9 in the throttling structure 303. A uniform and stable high-pressure air film is formed on the inner surface of the bearing. This air film provides effective support for the rotor, allowing the rotor to run smoothly in the bearing, reducing friction and wear, and increasing the service life of the bearing. At the same time, due to the existence of the air film, the rigidity and damping characteristics of the bearing are also enhanced, making the bearing more stable and reliable when subjected to impact and vibration. The O-rings 3 are installed in the mounting groove on the bearing sleeve 2. After the bearing sleeve 2 and the housing 1 are installed together, they seal the gas inside the bearing, effectively preventing the leakage of high-pressure gas, and ensuring that the bearing can maintain a stable gas pressure and flow during operation, thereby ensuring the stability and reliability of the bearing.

[0033] Working principle: When the static pressure gas bearing starts to work, the external high-pressure gas enters the circumferential gas supply channel 8 of the bearing through the gas nozzle joint 6. Since the circumferential gas supply channel 8 is connected to the axial gas supply channel 7 through penetration, the high-pressure gas can flow to each throttling structure 303. The throttling structure 303 makes each micropore 9 have the same diameter, and the number of micropores 9 is between 4 and 8. These micropores 9 are evenly distributed on a circle with a radius of R. No matter how the number of micropores 9 changes, the sum of the cross-sectional areas of all micropores 9 in the throttling structure 303 remains unchanged, which ensures that the bearing can remain stable under different loads;

[0034] The high-pressure gas flows into the inner surface of the static pressure gas bearing through the micropores 9 in the throttling structure 303, forming a uniform and stable high-pressure gas film. This gas film provides effective support for the rotor, allowing the rotor to run smoothly in the bearing, reducing friction and wear, and increasing the service life of the bearing. At the same time, due to the existence of the gas film, the rigidity and damping characteristics of the bearing are also enhanced, making the bearing more stable and reliable when subjected to impact and vibration;

[0035] The O-rings 3 are installed in the mounting grooves on the bearing sleeve 2. After the bearing sleeve 2 and the housing 1 are installed together, they seal the gas inside the bearing, effectively preventing the leakage of high-pressure gas, ensuring that the bearing can maintain a stable gas pressure and flow during operation, thereby ensuring the stability and reliability of the bearing;

[0036] The entire static pressure gas bearing realizes the uniform supply and stable distribution of high-pressure gas through the throttling structure 303 with integrated structure of multiple micropores 9 and the mutual cooperation of circumferential gas supply channel 8 and axial gas supply channel 7, which not only improves the bearing capacity and stability, but also reduces friction loss and maintenance cost, providing strong support for various high-precision, high-speed and high-reliability mechanical equipment.

[0037] It should be noted that, in this article, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 a limitation on the utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected", and "connected" should be understood in a broad sense. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "connected" can be a direct connection, an indirect connection through an intermediate medium, or a connection between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A radial static pressure gas bearing with a multi-microporous integrated structure, comprising a housing (1), characterized in that: A bearing sleeve (2) is fixedly connected to the interior of the housing (1), two O-rings (3) are provided at both ends of the bearing sleeve (2), a group of annular grooves (301) are provided at the center of the bearing sleeve (2), axial grooves (302) are connected and penetrated around the annular groove (301), four groups of throttling structures (303) are provided in the annular groove (301), and the annular groove (301) and the axial groove (302) cooperate with each other to form an axial air supply channel (7).

2. A radial static pressure gas bearing with a multi-microporous integrated structure according to claim 1, characterized in that: Circumferential air supply channels (8) are fixedly connected to both sides of the axial air supply channel (7), and an air nozzle joint (6) is provided inside the top of the housing (1).

3. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 1, characterized in that: An end cover (4) is fixedly connected to an outer wall of one side of the housing (1), and a screw (5) is fixedly connected to the inner side of the end cover (4).

4. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 1, characterized in that: A micropore (9) is arranged inside the throttling structure (303), and the throttling structure (303) is composed of a plurality of micropores (9).

5. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 2, characterized in that: The air nozzle joint (6) is opened radially along the outer shell (1), and one end of the outlet of the air nozzle joint (6) is located in the middle of the annular groove (301) on the bearing sleeve (2).

6. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 1, characterized in that: The axial grooves (302) are evenly distributed in four circumferential directions with respect to the annular groove (301), and the axial grooves (302) and the annular groove (301) are perpendicular to each other.

7. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 1, characterized in that: The throttling structures (303) are evenly distributed with respect to the annular groove (301).

8. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 2, characterized in that: The circumferential air supply channel (8) is symmetrically distributed on both sides of the axial air supply channel (7), and the circumferential air supply channel (8) is connected to the axial air supply channel (7) through a through hole.

9. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 3, characterized in that: The inner surface of one side of the end cover (4) is tightly fitted with the outer surface of one side of the housing (1) and the bearing sleeve (2), and the end cover (4) forms a fixed structure with the housing (1) and the bearing sleeve (2) via screws (5).

10. The radial static pressure gas bearing with a multi-microporous integrated structure according to claim 4, characterized in that: The diameter of each micropore (9) is the same, and the micropores (9) are distributed in a ring shape.

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