Bionic static and dynamic pressure mixed gas thrust bearing

Abstract

The invention relates to a bionic static and dynamic pressure mixed gas thrust bearing in the technical field of gas foil bearings. The bionic static and dynamic pressure mixed gas thrust bearing comprises a top foil, a wedge-shaped gasket, a support shaped like a Chinese character'tian ', a perforated base and a base. The support shaped like the Chinese character'tian 'comprises three layers of support elements shaped like the Chinese character'tian', and adjacent elements are fixedly connected through positioning pins. The top foil simulates the shape of a belief wing, the structure of the top foil can be continuously optimized, and flow field distribution of an air film layer is adjusted so as to adapt to complex and changeable working conditions of different bearing capacities, temperatures and rotating speeds. The wedge-shaped gasket is provided with two areas formed by integrated chemical etching to form a wedge-shaped high-pressure gas film, the support shaped like the Chinese character'tian 'forms an elastic supporting structure, a gas source is provided by a base gas supply hole before the wedge shape starts, and the bearing takes off without dry friction by adjusting the gas supply pressure. And for the same bearing clearance, more gas exists by increasing gas inflow, blocking gas outflow and gas radial escape, so that the purpose of increasing the bearing capacity and stability of the bearing is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of gas foil bearings, and more specifically to a bionic static and dynamic pressure mixed gas thrust bearing. Technical Background

[0002] Air foil bearings use flexible foil structures as elastic supports. They are dynamic pressure air bearings with good flexible surfaces. When the rotor rotates at high speed, it relies on the relative movement between the shaft and the bearing surface, and squeezes a certain viscosity of gas through the wedge effect to form a pressure lubricating gas film, so that the rotor is suspended in the bearing to achieve support and lubrication. Air foil bearings use gas as a lubricating medium. Its surface has a certain degree of flexibility, low friction power consumption, and stable operation. It can operate in extreme environments such as low and high temperatures and high speeds. It represents an advanced technological innovation with the advantages of high speed, high efficiency, and extremely low friction loss. These advantages make air foil bearings widely used in rotating machinery such as micro gas turbines, blowers, air compressors, air cycle machines, and oil-free turbochargers.

[0003] At present, the bump foil type air foil thrust bearing is widely used. Its structure is usually composed of three key components: top foil, bump foil and support base. The top box is installed on the bump foil and moves relative to the shaft surface. Through the wedge effect, it squeezes a certain viscosity of gas to form a pressure lubrication gas film. The bump foil plays an elastic supporting role and is the main source of bearing structural stiffness and damping. The top foil and the bump foil together constitute the flexible supporting surface of the bump foil type air foil thrust bearing. The bump foil is usually a corrugated structure. Like the top foil, one end is fixed on the support base and the other end can slide freely. The synergistic effect of these three components ensures that the bump foil type air foil thrust bearing can still maintain excellent dynamic stability under high-speed rotation conditions.

[0004] However, the existing corrugated foil type air foil thrust bearing still has some problems in application. When applied to high-power energy and power equipment, the corrugated foil type air foil bearing has the problems of poor load-bearing capacity, insufficient damping, poor stability and high energy consumption. Therefore, a new structure is needed to improve the flow field, enhance stability, increase load-bearing capacity and damping, and reduce energy consumption. Summary of the invention

[0005] The purpose of the present invention is to provide a bionic static and dynamic pressure mixed gas thrust bearing. Compared with the wave foil type air foil bearing in the prior art, the top foil is in the shape of an albatross wing. By changing the angle of the composition, the self-structure can be continuously optimized and the flow field distribution of the air film layer can be adjusted to adapt to the complex and changeable working conditions of different bearing capacities, temperatures and rotation speeds. The present invention not only hinders the radial escape of gas and the outflow of gas, but also increases the inflow of gas, so that there is more gas in the bearing gap, thereby achieving the purpose of increasing the bearing capacity and stability of the bearing. At the same time, the wedge-shaped gasket has two areas that are chemically etched in an integrated manner, the wedge-shaped area and the bearing area, and there is a height difference to form a wedge, which makes it easier to form a wedge-shaped air film, optimizes the gas flow shape and improves the gas lubrication effect, and the integrated chemical etching can more accurately control the height of the wedge. At the same time, the air supply hole of the base provides a gas source before the wedge starts, and the bearing can take off without dry friction by adjusting the air supply pressure. The many technical effects that can be produced by the technical solution provided by the new invention are described in detail below.

[0006] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0007] The invention provides a bionic static and dynamic pressure mixed gas thrust bearing, which comprises a top foil, a wedge-shaped gasket, a field-shaped support, a base with holes, and a base.

[0008] Preferably, the top foil imitates the shape of albatross wings, and the wedge-shaped gasket, the field-shaped support, the perforated base, and the base correspond to the shape of the top foil.

[0009] Preferably, the wedge-shaped gasket is an integrated structure, divided into a wedge-shaped area and a bearing area, and there is a height difference.

[0010] Preferably, the base comprises an air supply port, a radial groove and an annular groove.

[0011] Preferably, the top foil, wedge-shaped gasket, field-shaped support, perforated base, and base edge are all provided with positioning holes and are fixedly connected by positioning pins.

[0012] The present invention provides a bionic static and dynamic pressure mixed gas thrust bearing, which relates to the technical field of gas foil bearings, including a top foil, a wedge-shaped gasket, a field-shaped support, a base with holes, and a base. The field-shaped support includes three layers of field-shaped support elements, and adjacent elements are fixedly connected by positioning pins. The top foil imitates the shape of the wings of an albatross, and is composed of carpal metacarpal bones, radius, elbow joint, and humerus. By changing the angles of the radius, elbow joint, and humerus, its own structure can be continuously optimized, and the flow field distribution of the air film layer can be adjusted to adapt to the complex and changeable working conditions of different bearing capacities, temperatures, and rotation speeds. The wedge-shaped gasket, the field-shaped support, the base with holes, and the base correspond to the shape of the top foil. At the same time, the wedge-shaped gasket has two areas that are chemically etched in an integrated manner, and there is a height difference to form a wedge-shaped high-pressure air film. The field-shaped support forms an elastic support structure, and the base with holes is combined with the base. The air supply hole of the base provides a gas source before the wedge starts, and the air supply pressure is adjusted to enable the bearing to take off without dry friction. For the same bearing clearance, more gas can be present by increasing the gas inflow, hindering the gas outflow and radial gas escape, thereby increasing the bearing's load capacity and stability. At the same time, it is easier to form a wedge-shaped gas film, optimize the gas flow shape and enhance the gas lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other features and advantages of the present invention will be more clearly understood from the following detailed description in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the exploded structure of a bionic static and dynamic pressure mixed gas thrust bearing in a new embodiment of the present invention;

[0015] Figure 2 A three-dimensional schematic diagram of a bionic static and dynamic pressure mixed gas thrust bearing in a novel embodiment of the present invention;

[0016] Figure 3 A bionic New Zealand albatross in a novel embodiment of the present invention;

[0017] Figure 4 A schematic top view of a top foil in a novel embodiment of the present invention;

[0018] Figure 5 A schematic top view of a wedge-shaped gasket in a new embodiment of the present invention;

[0019] Figure 6 It is a partial schematic diagram of the combination of the wedge-shaped gasket, the top foil and the thrust plate in the new embodiment of the present invention;

[0020] Figure 7 A partial three-dimensional schematic diagram of a wedge-shaped gasket in a new embodiment of the present invention;

[0021] Figure 8 It is a top view schematic diagram of the first layer of the zigzag support in the new embodiment of the present invention;

[0022] Fig. 9 It is a top view schematic diagram of the second layer of the zigzag support in the new embodiment of the present invention;

[0023] Fig.10 It is a top view schematic diagram of the third layer of the zigzag support in the new embodiment of the present invention;

[0024] Fig.11 It is a top view schematic diagram of a base with holes in a new embodiment of the present invention;

[0025] Fig.12 A schematic top view of a base in a new embodiment of the present invention;

[0026] Figure 1-Figure 12 Middle: 1. Top foil; 2. Wedge-shaped gasket; 3. Field-shaped support; 4. Base with holes; 5. Base; 6. Positioning hole; 7. Thrust plate; 11. First layer of field-shaped support; 12. Second layer of field-shaped support; 13. Third layer of field-shaped support; 20. Carpal metacarpal bone; 21. Radius; 22. Elbow joint; 23. Humerus; 24. Cantilever; 25. Wedge-shaped area; 26. Bearing area; 27. Air inlet; 28. Air supply hole; 29. ​​Radial groove; 30. Annular groove DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the purpose, technical solution and advantages of the present invention, the technical solution of the present invention will be described in detail below. It should be clear that the embodiments described only represent some embodiments of the present invention, not all embodiments. According to different embodiments of the present invention, professionals in the field can obtain various other implementation methods without creative work, and these methods all fall within the protection scope of the present invention.

[0028] The purpose of this specific embodiment is to provide a bionic static and dynamic pressure mixed gas thrust bearing, which increases the bearing's load-bearing capacity and stability, while making it easier to form a wedge-shaped gas film, optimize the gas flow shape and enhance the gas lubrication effect.

[0029] The following is a detailed explanation of the embodiments in conjunction with the accompanying drawings. It should be emphasized that the embodiments listed below will not impose any restrictions on the invention content contained in the claims. In addition, the content covered by the following embodiments is not only applicable to the solutions of the invention stated in the claims.

[0030] like Figures 1 to 11As shown, this embodiment provides a bionic static and dynamic pressure mixed gas thrust bearing, including a top foil (1), a wedge-shaped gasket (2), a field-shaped support (3); a base with holes (4); and a base (5), wherein the field-shaped support includes three layers of field-shaped support elements, and adjacent elements are fixedly connected by positioning pins. The top foil imitates the shape of the albatross wings and is composed of carpal metacarpal bones, radius, elbow joint, and humerus. By changing the angles of the radius, elbow joint, and humerus, its own structure can be continuously optimized and the flow field distribution of the air film layer can be adjusted to adapt to complex and changeable working conditions with different load-bearing capacities, temperatures, and rotation speeds. The wedge-shaped gasket, the field-shaped support, the base with holes, and the base correspond to the shape of the top foil. This shape increases the bearing capacity of the bearing by hindering the radial escape of gas. At the same time, the wedge-shaped gasket has two integrated chemically etched areas, the wedge-shaped area and the bearing area. There is a height difference to form a wedge-shaped high-pressure air film, and the field-shaped support forms an elastic support structure. The perforated base is combined with the base. The base air supply hole provides a gas source before the wedge starts, and the air supply pressure is adjusted to allow the bearing to take off without dry friction. The annular groove of the base connects the radial grooves, allowing the gas to flow between the radial grooves and flow into the field-shaped support through the perforated base air inlet.

[0031] For the same bearing clearance, more gas can be present by increasing the gas inflow, hindering the gas outflow and radial gas escape, thereby increasing the bearing's load capacity and stability. At the same time, it is easier to form a wedge-shaped gas film, optimize the gas flow shape and enhance the gas lubrication effect.

[0032] The manufacturing process of the traditional corrugated foil type air foil bearing is complicated, including multiple processes such as stamping, heat treatment, welding, and assembly. Not only does it require highly precise assembly, but it is also difficult to ensure manufacturing consistency. However, the present invention provides a new technical solution, in which the top foil is stamped, the wedge-shaped gasket and the elastic foil assembly can be chemically etched, and the thrust plate is machine pressed. The role of this technical solution is to simplify the manufacturing process of the corrugated foil type air foil bearing, improve the consistency of manufacturing, and reduce the complexity of the assembly process, thereby expected to reduce manufacturing costs and improve production efficiency.

[0033] Specifically, the wedge-shaped gasket (2) is located between the top foil (1) and the field-shaped support (3), and the top foil (1), the wedge-shaped gasket (2), the field-shaped support (3), the perforated base (4) and the base (5) have a through hollow structure along the axis to allow the shaft to penetrate and connect.

[0034] Furthermore, the top foil (1), the wedge-shaped gasket (2), the field-shaped support (3), the perforated base (4), and the outer edges of the base (5) are all provided with positioning holes and can be fixed by positioning pins.

[0035] The above paragraphs indicate the mutual reference and complementarity of the contents between different embodiments. There may be similar or identical parts between the embodiments, and the contents not described in detail in some embodiments may be found in other embodiments. The multiple solutions provided by the present invention are independent of each other and do not restrict each other, but can also be combined with each other without conflict to achieve multiple effects.

[0036] The description of the disclosed embodiments enables a person skilled in the art to implement or apply the present invention. Various modifications to these embodiments will be apparent to a person skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is limited to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A bionic static and dynamic mixed gas thrust bearing, characterized in that: It comprises a top foil (1), a wedge-shaped gasket (2), a field-shaped support (3), a base with holes (4), and a base (5). The field-shaped support (3) comprises three layers of field-shaped support elements, and adjacent elements are fixedly connected by positioning pins.

2. A bionic static and dynamic mixed gas thrust bearing as claimed in claim 1, characterized in that: The top foil (1) is shaped like an albatross wing and is composed of a carpal metacarpal bone (20), a radius (21), an elbow joint (22), and a humerus (23). By changing the angles of the radius (21), the elbow joint (22), and the humerus (23), the top foil (1) can continuously optimize its structure and adjust the flow field distribution of the air film layer to adapt to complex and changeable working conditions with different load capacities, temperatures, and rotation speeds.

3. A bionic static and dynamic mixed gas thrust bearing as claimed in claim 1, characterized in that: The wedge-shaped gasket (2) has two areas, a wedge-shaped area and a bearing area, which are formed by integrated chemical etching. There is a height difference to form a wedge shape, and the integrated chemical etching can more accurately control the height of the wedge.

4. A bionic static and dynamic mixed gas thrust bearing as claimed in claim 1, characterized in that: An air supply hole (28) of the base (5) provides a gas source through a combination of an annular groove (30) and a radial groove (29) before the wedging starts, and the bearing can take off without dry friction by adjusting the air supply pressure.

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