Beam type rigidity self-adjusting air suspension radial air bearing
By incorporating a beam-type stiffness self-adjusting structure with inclined fins in the radial air bearing, the problems of low load-bearing capacity and uneven stability are solved, achieving higher load-bearing capacity and stability, making it suitable for high-speed centrifugal air compressors.
Patent Information
- Application Number
- CN202520733972.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-17
AI Technical Summary
Existing radial air bearings have low load-bearing capacity, poor stability, and uneven load distribution in high-speed centrifugal air compressors, and cannot meet the requirements of long-term operation.
The structure employs a beam-type stiffness self-adjusting air-suspended radial air bearing, which enhances load-bearing capacity and stability by setting inclined fins on the first and second elastic corrugated foils and stacking them between the first and second elastic fins.
It significantly improves radial force bearing capacity and stability, enabling it to meet the long-term working requirements of high-speed centrifugal air compressors.
Smart Images
Figure CN223953079U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to radial air bearing technical field especially relates to a beam type stiffness self -adjusting air suspension radial air bearing. BACKGROUND
[0002] At present, the radial force of the main shaft in the high-speed centrifugal air compressor is mainly borne by the radial air bearing, the radial air bearing is a self-acting dynamic pressure air bearing using air as the lubricating medium, the structure mainly includes the top foil and the wave foil, the wave foil is arranged in the inner hole of the bearing seat and is attached to the inner hole wall of the bearing seat in the circumferential direction, the top foil is arranged in the wave foil and is attached to the wave foil in the circumferential direction, and the main shaft is located in the top foil, and a high-pressure gas layer is formed between the main shaft and the top foil. When the radial force is borne, the radial air bearing with the structure mainly relies on the elastic deformation of the wave foil as a whole when being extruded under stress, and the radial force bearing capacity is low, the stability is not good, the consistency is poor, the bearing capacity is uneven, and the long-time working environment of the high-speed centrifugal air compressor cannot be met. At present, there is no good way to solve the above problems.
[0003] In summary, the above problems of the radial air bearing in the use process have become a technical problem that needs to be solved in the industry. UTILITY MODEL CONTENTS
[0004] The utility model provides a beam type stiffness self -adjusting air suspension radial air bearing to make up for the deficiency of prior art, and solve the problems of low radial force bearing capacity, poor stability and uneven bearing capacity of the previous radial air bearing.
[0005] The utility model adopts the technical scheme that:
[0006] A beam type stiffness self -adjusting air suspension radial air bearing, including first elastic wave foil, second elastic wave foil and top foil that are stacked in sequence from outside to inside, one end of first elastic wave foil, second elastic wave foil and top foil is equipped with the bending part as fixed end, and the other end is all free end, be equipped with a plurality of first elastic fin that tilt outward on first elastic wave foil, the periphery of each first elastic fin is equipped with the openwork, the position of each first elastic fin on second elastic wave foil is equipped with the second elastic fin that tilt outward, and the second elastic fin is superimposed with first elastic fin for improving bearing capacity.
[0007] The inclination direction of the second elastic fin is opposite to that of the first elastic fin.
[0008] The size of the first elastic fin is greater than that of the second elastic fin.
[0009] The openwork is a square hole, two first elastic fins are arranged in each square hole, and the inclination directions of the two first elastic fins are opposite.
[0010] The bending part is provided with a fixing hole.
[0011] Corresponding positions of the first elastic wave foil, the second elastic wave foil and the top foil are provided with error-proof holes.
[0012] The above scheme has the following advantages:
[0013] By providing a plurality of outwardly inclined first elastic fins on the first elastic wave foil and a second elastic fin outwardly inclined corresponding to the position of each first elastic fin on the second elastic wave foil, on the one hand, the first elastic wave foil and the second elastic wave foil rely on the elastic deformation of the whole to bear the radial force, on the other hand, the elastic deformation of the plurality of first elastic fins and the second elastic fins bears the radial force, so that the radial force bearing capacity is greatly improved, in addition, the first elastic fins and the second elastic fins are evenly arranged on the first elastic wave foil and the second elastic wave foil, which not only makes the bearing capacity more uniform, improves the stability and consistency, and the second elastic fin can greatly improve the bearing capacity after being superimposed with the first elastic fin, which can meet the long-time working environment requirements of the high-speed centrifugal air compressor. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a three-dimensional structure schematic diagram of the utility model.
[0015] Figure 2 It is a sectional structure schematic diagram of the utility model.
[0016] Figure 3 It is a structure schematic diagram of the first elastic wave foil of the utility model.
[0017] Figure 4 It is a structure schematic diagram of the second elastic wave foil of the utility model.
[0018] Figure 5 It is Figure 1 The local enlarged structure schematic diagram in
[0019] In the figure, 1, first elastic wave foil, 2, second elastic wave foil, 3, top foil, 4, bending part, 5, first elastic fin, 6, fret, 7, second elastic fin, 8, fixing hole, 9, error-proof hole. DETAILED DESCRIPTION
[0020] In order to clearly illustrate the technical features of the scheme, the utility model will be described in detail below through specific implementation mode, and combined with its drawings.
[0021] For example Figures 1-5As shown, a beam type stiffness self-adjusting air suspension radial air bearing, comprising a first elastic wave foil 1, a second elastic wave foil 2 and a top foil 3 stacked in turn from outside to inside, one end of the first elastic wave foil 1, the second elastic wave foil 2 and the top foil 3 is provided with a bending part 4 as a fixed end, the other end is a free end, a plurality of outwardly inclined first elastic fins 5 are arranged on the first elastic wave foil 1, a perforated hole 6 is arranged on the periphery of each first elastic fin 5, an outwardly inclined second elastic fin 7 is arranged on the second elastic wave foil 2 corresponding to the position of each first elastic fin 5, and the second elastic fin 7 is stacked with the first elastic fin 5 for improving the bearing capacity.
[0022] The inclination direction of the second elastic fin 7 is opposite to that of the first elastic fin 5, when the first elastic fin 5 is extruded and deformed by radial force, the first elastic fin 5 can be in contact with the second elastic fin 7 after displacement inward, at this time, the second elastic fin 7 is stacked with the first elastic fin 5, which can bear greater radial load.
[0023] The size of the first elastic fin 5 is larger than that of the second elastic fin 7, the first elastic fin 5 is in contact with the inner hole wall of the bearing seat on the outside, and the second elastic fin 7 is located on the inside of the first elastic fin 5, the first elastic fin 5 can completely cover the second elastic fin 7 on the inside.
[0024] The perforated hole 6 is a square hole, two first elastic fins 5 are arranged in each square hole, which can increase the number of first elastic fins 5 and improve the bearing capacity, the inclination directions of the two first elastic fins 5 are opposite, which can make the bearing capacity more uniform, improve stability and consistency.
[0025] The bending part 4 is provided with a fixing hole 8, which can be fixed in the slot of the bearing seat after cooperating with the column pin.
[0026] The corresponding positions of the first elastic wave foil 1, the second elastic wave foil 2 and the top foil 3 are provided with error prevention holes 9, which play a positioning role when assembling.
[0027] Working principle:
[0028] When working, the first elastic fins 5 on the first elastic wave foil 1 are attached to the inner hole wall of the bearing seat, and the second elastic fins 7 on the second elastic wave foil 2 are located on the inner side of each first elastic fin 5. When the radial force is not large, on the one hand, the elastic deformation of the first elastic wave foil 1, the second elastic wave foil 2 and the top foil 1 as a whole is relied on to bear the radial force, and on the other hand, the elastic deformation of the first elastic fins 5 themselves is relied on to bear the radial force. When the radial force is too large, the first elastic fins 5 are displaced inward under the extrusion of the radial force and can be in abutment with the second elastic fins 7. At this time, the second elastic fins 7 are superimposed on the first elastic fins 5, the radial bearing capacity of the second elastic fins 7 is superimposed on the radial bearing capacity of the first elastic fins 5, so that the radial force bearing capacity is greatly improved.
[0029] The above specific embodiments cannot be regarded as the limitation of the protection scope of the utility model, and any alternative improvement or transformation made by the person skilled in the art to the utility model embodiments falls within the protection scope of the utility model.
[0030] The parts not described in the utility model are the known technology of the person skilled in the art.
Claims
1. A beam stiffness self-adjusting aerodynamic radial air bearing, characterized by: The first elastic wave foil, the second elastic wave foil and the top foil are sequentially stacked from outside to inside, one end of the first elastic wave foil, the second elastic wave foil and the top foil is provided with a bending part as a fixed end, and the other end is a free end, the first elastic wave foil is provided with a plurality of first elastic fins outwardly inclined, the periphery of each first elastic fin is provided with a hollow hole, the second elastic wave foil is provided with a second elastic fin outwardly inclined at a position corresponding to each first elastic fin, and the second elastic fin is stacked with the first elastic fin to improve the bearing capacity.
2. A beam stiffness self-adjusting aerodynamic radial air bearing according to claim 1, characterized in that: The inclination direction of the second elastic fin is opposite to that of the first elastic fin.
3. A beam stiffness self-adjusting aerodynamic radial air bearing according to claim 1, characterized in that: The size of the first elastic fin is greater than that of the second elastic fin.
4. A beam stiffness self-adjusting aerodynamic radial air bearing according to claim 1, characterized in that: The hollow hole is a square hole, two first elastic fins are arranged in each square hole, and the inclination directions of the two first elastic fins are opposite.
5. A beam stiffness self-adjusting aerodynamic radial air bearing according to claim 1, wherein: The bending part is provided with a fixing hole.
6. A beam stiffness self-adjusting aerodynamic radial air bearing according to claim 1, characterized in that: The first elastic wave foil, the second elastic wave foil and the top foil are provided with an error-proof hole at a corresponding position.