Cooling structure of air suspension radial air bearing
By setting up heat dissipation channels in the bearing housing and introducing cooling gas, combined with the elastic fin design, the problems of poor cooling effect and insufficient load-bearing capacity of radial air bearings are solved, achieving efficient cooling and improved stability, and extending service life.
Patent Information
- Application Number
- CN202520733763.0
- 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 poor cooling performance, short lifespan, low and uneven load-bearing capacity, and poor stability in high-speed centrifugal air compressors, making it difficult to meet the requirements of long-term operation.
A heat dissipation channel is provided in the bearing housing and cooling gas is introduced for cooling. The design of the first and second elastic fins is combined to enhance the load-bearing capacity and stability. By setting a heat dissipation channel between the inner hole of the bearing housing and the motor cavity, the radial air bearing is cooled by cooling gas, and the load-bearing capacity is improved by the superposition design of the first and second elastic fins.
It achieves efficient cooling, improves the life and load-bearing capacity of radial air bearings, enhances stability and consistency, and can meet the long-term working requirements of high-speed centrifugal air compressors.
Smart Images
Figure CN223953077U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to radial air bearing technical field especially relates to a cooling structure of 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 through the radial air bearing, the radial air bearing is a self-acting dynamic pressure air bearing using air as lubricating medium, and the structure mainly comprises a top foil and a wave foil, the wave foil is arranged in the inner hole of the bearing seat and adheres to the inner hole wall of the bearing seat in the circumferential direction, the top foil is arranged in the wave foil and adheres 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. The radial air bearing with the structure, on the one hand, mainly relies on the overall elastic deformation of the wave foil under extrusion stress when bearing the radial force, and the radial force bearing capacity is low, the stability is not good, the consistency is poor, and the bearing capacity is uneven; on the other hand, the cooling effect of the bearing in the working process is poor, mainly relying on the gap natural ventilation heat dissipation between the bearing and the inner hole of the bearing seat, the service life of the bearing is short, and the bearing is easy to be damaged, cannot meet the long-time working environment of the high-speed centrifugal air compressor, and 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 urgently to be solved in the industry. UTILITY MODEL CONTENTS
[0004] The utility model provides a cooling structure of air suspension radial air bearing to make up for the deficiency of prior art, solves the problems of poor cooling effect, short service life and easy damage of the previous radial air bearing.
[0005] The utility model adopts the technical scheme that:
[0006] A cooling structure of air suspension radial air bearing, including bearing seat, the inner hole of bearing seat is installed with radial air bearing, is equipped with the boss on the side wall of bearing seat close to motor cavity side, is equipped with a plurality of heat dissipation channels that are connected with motor cavity in the inner hole of bearing seat along the circumference in the boss, and the cooling gas in the motor cavity enters the inner hole of bearing seat through the heat dissipation channel and cools the radial air bearing.
[0007] The radial air bearing comprises a first elastic wave foil, a second elastic wave foil and a top foil which 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, a plurality of first elastic fins obliquely outward are arranged on the first elastic wave foil, a plurality of first elastic fins obliquely outward are arranged on the second elastic wave foil at positions corresponding to the first elastic fins, and the second elastic fins are stacked with the first elastic fins to improve the bearing capacity.
[0008] The inclination direction of the second elastic fin is opposite to that of the first elastic fin.
[0009] The size of the first elastic fin is larger than that of the second elastic fin.
[0010] The plurality of first elastic fins obliquely outward are arranged on the first elastic wave foil, a plurality of first elastic fins obliquely outward are arranged on the second elastic wave foil at positions corresponding to the first elastic fins, and the second elastic fins are stacked with the first elastic fins to improve the bearing capacity.
[0011] The bending part is provided with a fixing hole.
[0012] The first elastic wave foil, the second elastic wave foil and the top foil are provided with error-proof holes at corresponding positions.
[0013] The utility model discloses the above -mentioned scheme has the following advantages:
[0014] The bearing seat is provided with a convex table on the side wall close to the motor cavity, a plurality of heat dissipation channels for connecting the bearing seat inner hole and the motor cavity are arranged on the convex table in the circumferential direction, cooling gas is introduced into the motor cavity, the cooling gas can enter the bearing seat inner hole through the heat dissipation channels to cool the radial air bearing, the cooling effect is good, heat dissipation is fast, the failure rate is low, and the service life of the radial air bearing is prolonged.
[0015] The first elastic wave foil is provided with a plurality of first elastic fins obliquely outward, the second elastic wave foil is provided with a plurality of second elastic fins obliquely outward at positions corresponding to the first elastic fins, on one hand, the first elastic wave foil and the second elastic wave foil are elastically deformed to bear the radial force, on the other hand, the first elastic fins and the second elastic fins are elastically deformed to bear the radial force, the radial force bearing capacity is greatly improved, in addition, the first elastic fins and the second elastic fins are uniformly arranged on the first elastic wave foil and the second elastic wave foil, not only can make the bearing capacity more uniform, improve stability and consistency, but also the second elastic fins can greatly improve the bearing capacity after being stacked with the first elastic fins, and the long-time working environment requirement of the high-speed centrifugal air compressor can be met. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model.
[0017] Figure 2 It is the sectional view structural schematic drawing of the utility model.
[0018] Figure 3 It is the three-dimensional structure schematic drawing of the radial air bearing of the utility model.
[0019] Figure 4 It is the sectional view structural schematic drawing of the radial air bearing of the utility model.
[0020] Figure 5 It is the structure schematic drawing of the first elastic wave foil of the utility model.
[0021] Figure 6 It is the structure schematic drawing of the second elastic wave foil of the utility model.
[0022] Figure 7 It is the sectional view structural schematic drawing of the utility model. Figure 3
[0023] In the drawing, 1, first elastic wave foil, 2, second elastic wave foil, 3, top foil, 4, bending part, 5, first elastic fin, 6, openwork, 7, second elastic fin, 8, fixing hole, 9, anti-error hole, 10, bearing seat, 11, radial air bearing, 12, boss, 13, heat dissipation channel. DETAILED DESCRIPTION
[0024] To clearly illustrate the technical features of the scheme, the utility model is described in detail below through specific implementation mode and in conjunction with its drawings.
[0025] As shown in Figures 1-7 A cooling structure of air suspension radial air bearing, including bearing seat 10, the inner hole of bearing seat 10 is installed with radial air bearing 11, the side wall of bearing seat 10 near motor cavity side is equipped with boss 12, and a plurality of heat dissipation channels 13 for connecting the inner hole of bearing seat 10 with motor cavity are arranged in the boss 12 along the circumference, and the cooling gas in motor cavity enters the inner hole of bearing seat 10 through heat dissipation channel 13 to cool radial air bearing 11.
[0026] The radial air bearing 11 includes first elastic wave foil 1, second elastic wave foil 2 and top foil 3 stacked in turn from outside to inside, one end of first elastic wave foil 1, second elastic wave foil 2 and top foil 3 is equipped with bending part 4 as fixed end, and the other end is free end, a plurality of outwardly inclined first elastic fins 5 are arranged on first elastic wave foil 1, openwork 6 is arranged on the periphery of each first elastic fin 5, outwardly inclined second elastic fin 7 is arranged on second elastic wave foil 2 corresponding to the position of each first elastic fin 5, and second elastic fin 7 is stacked with first elastic fin 5 to improve the carrying capacity.
[0027] The second elastic fin 7 is opposite to the inclined direction of the first elastic fin 5, when the first elastic fin 5 is extruded by the radial force and deformed, the first elastic fin 5 is displaced inward and can abut against the second elastic fin 7, at this time, the second elastic fin 7 is superimposed with the first elastic fin 5, and can bear greater radial load.
[0028] The size of the first elastic fin 5 is greater than the size of the second elastic fin 7, the first elastic fin 5 is in contact with the inner hole wall of the bearing seat 10 on the outside, and the second elastic fin 7 is located on the inside of the first elastic fin 5, and the first elastic fin 5 can completely cover the second elastic fin 7 on the inside.
[0029] The hole 6 is a square hole, two first elastic fins 5 are arranged in each square hole, the number of the first elastic fins 5 can be increased, thereby improving the bearing capacity, the inclined directions of the two first elastic fins 5 are opposite, the bearing capacity can be more uniform, and stability and consistency can be improved.
[0030] The bending part 4 is provided with a fixing hole 8, and after cooperation with the column pin, the bending part 4 can be fixed in the slot of the bearing seat.
[0031] 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-proof holes 9, which play a positioning role during assembly.
[0032] Working principle:
[0033] During work, the cooling gas inlet and outlet are arranged on the motor shell, the cooling gas can be introduced into the motor cavity, the cooling gas can enter the inner hole of the bearing seat 10 through the plurality of heat dissipation channels 13, the radial air bearing 11 is cooled, and the heat generated during work of the radial air bearing 11 is carried out of the motor outside, the cooling effect is good, heat dissipation is fast, and the service life of the radial air bearing 11 is prolonged.
[0034] During work of the radial air bearing 11, the plurality of first elastic fins 5 on the first elastic wave foil 1 are attached to the inner hole wall of the bearing seat, the plurality of second elastic fins 7 on the second elastic wave foil 2 are located on the inside 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 plurality of first elastic fins 5 is relied on to bear the radial force, when the radial force is too large, the first elastic fin 5 is extruded by the radial force and is displaced inward, can abut against the second elastic fin 7, at this time, the second elastic fin 7 is superimposed with the first elastic fin 5, the radial bearing capacity of the second elastic fin 7 is superimposed with the radial bearing capacity of the first elastic fin 5, thereby greatly improving the radial force bearing capacity.
[0035] The specific embodiments above cannot be used as a limitation to the protection scope of the utility model, and any alternative improvement or transformation made by the skilled in the art to the utility model embodiments falls within the protection scope of the utility model.
[0036] The parts not described in the utility model are the common technology of the skilled in the art.
Claims
1. A cooling structure of an air-suspension radial air bearing, characterized by: The bearing seat is provided with a boss on the side wall close to the motor cavity, and a plurality of heat dissipation channels for connecting the inner hole of the bearing seat and the motor cavity are arranged in the boss in a circumferential direction.
2. The cooling structure of an air levitated radial air bearing according to claim 1, characterized by: The radial air bearing comprises a first elastic wave foil, a second elastic wave foil and a top foil which are stacked in sequence 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, a plurality of first elastic fins are arranged on the first elastic wave foil and inclined outward, a perforated hole is arranged on the periphery of each first elastic fin, a second elastic fin is arranged on the second elastic wave foil corresponding to the position of each first elastic fin and inclined outward, and the second elastic fin is stacked with the first elastic fin to improve the bearing capacity.
3. A cooling structure for an air-levitated radial air bearing according to claim 2, characterized in that: The inclination direction of the second elastic fin is opposite to that of the first elastic fin.
4. The cooling structure of an air levitated radial air bearing according to claim 2, wherein: The size of the first elastic fin is larger than that of the second elastic fin.
5. The cooling structure of an air levitated radial air bearing according to claim 2, wherein: The perforated 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.
6. The cooling structure of an air levitated radial air bearing according to claim 2, wherein: The bending part is provided with a fixing hole.
7. The cooling structure of an air levitated radial air bearing according to claim 2, wherein: The corresponding positions of the first elastic wave foil, the second elastic wave foil and the top foil are provided with error-proof holes.