Two-lobe bump foil type radial bearing
By using a two-lobed corrugated radial bearing structure, the problems of high stress and jamming caused by the small deformation of the integral corrugated foil are solved, achieving stable rotor support and operation and improving the service life of the bearing.
Patent Information
- Application Number
- CN202322438130.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-08
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2033-09-08
AI Technical Summary
The small deformation of the integral corrugated foil leads to high stress, flexural deformation, and easy jamming, resulting in a loss of support for the rotor.
The bearing adopts a two-lobed corrugated foil radial bearing structure. The top foil and the bearing housing are provided with first and second corrugated foils. The two ends of the top foil are free ends. The ends of the corrugated foils are movably inserted into the grooves. The original curvature of the corrugated foils is greater than that of the assembled state. A wear-resistant coating is sprayed to improve service life.
The increased deformation of the corrugated foil prevents jamming, ensures the formation of the air film, provides stable rotor support, and improves bearing life and operational stability.
Smart Images
Figure CN223953076U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to air bearing technical field especially relates to a two-labium wave foil type radial bearing. BACKGROUND
[0002] The radial air bearing is supported by the compression effect of the wedge-shaped gap gas film between the top foil and the rotor for high-speed operation, mainly including the bearing seat, the wave foil and the top foil, wherein the wave foil and the top foil are generally in the integral structure, the wave foil in the integral structure has small deformation, when local deformation occurs, stress or flexural deformation of the whole wave foil is caused, resulting in that the whole wave foil cannot be used, when being pressed by the rotor, the integral wave foil cannot be adjusted by relying on the shape change, and the wave foil is easily stuck, so that the gas film cannot be formed, and the supporting effect on the rotor is lost.
[0003] In summary, the small deformation of the wave foil in the radial air bearing has become a technical problem to be solved in the industry. UTILITY MODEL CONTENTS
[0004] The utility model provides a two-labium wave foil type radial bearing to make up for the shortage of prior art, solve the problem of big stress, flexural deformation and easy sticking of the previous integral wave foil due to small deformation.
[0005] The utility model provides a two-labium wave foil type radial bearing to make up for the shortage of prior art, solve the problem of big stress, flexural deformation and easy sticking of the previous integral wave foil due to small deformation.
[0006] A two-labium wave foil type radial bearing, including the top foil that is integrally arranged in ring shape, the two ends of the top foil are free ends and are provided with top foil constraint edges, the top foil is installed in the bearing seat, the top foil constraint edges of the two ends of the top foil are respectively movably inserted in the first recess and the second recess in the bearing seat, the first wave foil and the second wave foil are arranged between the top foil and the bearing seat, each wave foil is pre-tightening assembly between the top foil and the bearing seat, the two ends of the first wave foil and the second wave foil are provided with wave foil constraint edges, one wave foil constraint edge of the first wave foil is movably inserted in the first recess, the other wave foil constraint edge of the first wave foil is movably inserted in the third recess opposite to the first recess, one wave foil constraint edge of the second wave foil is movably inserted in the second recess, and the other wave foil constraint edge of the second wave foil is movably inserted in the third recess.
[0007] The wave height of the first wave foil and the second wave foil is consistent.
[0008] The original radian of the first wave foil and the second wave foil is greater than the radian in the actual assembly state.
[0009] The first wave foil, the second wave foil and the top foil are integrally stamped and formed.
[0010] The first recess and the second recess are arranged close to each other.
[0011] The first groove, the second groove and the third groove are respectively arranged through the inner wall of the bearing seat in the axial direction.
[0012] The inner side of the two ends of the bearing seat is respectively provided with a check ring for limiting the axial displacement of the top foil, the first wave foil and the second wave foil.
[0013] The inner surface of the top foil is sprayed with a wear-resistant coating.
[0014] The wear-resistant coating comprises a molybdenum disulfide coating or a polytetrafluoroethylene coating.
[0015] The utility model has the following advantages by adopting the above scheme:
[0016] By arranging the first wave foil and the second wave foil between the top foil and the bearing seat, the two ends of the top foil, the first wave foil and the second wave foil are free ends, which is easier to assemble and has a larger deformation amount. When a wave foil is subjected to stress, the other wave foil will not be affected, and the overall use will not be affected. When the first wave foil or the second wave foil is subjected to rotor compression, it can be adjusted by relying on its own deformation to avoid the situation of being stuck, which is beneficial to the formation of the gas film and ensures the supporting effect on the rotor. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a three-dimensional structure schematic view of the utility model.
[0018] Figure 2 It is a structure schematic view of the utility model installed in the bearing seat.
[0019] Figure 3 It is a longitudinal section structure schematic view of the utility model. Figure 2
[0020] Figure 4 It is a transverse section structure schematic view of the utility model. Figure 2
[0021] In the figure, 1 is a top foil, 2 is a top foil constraint edge, 3 is a bearing seat, 4 is a first groove, 5 is a second groove, 6 is a first wave foil, 7 is a second wave foil, 8 is a wave foil constraint edge, 9 is a third groove, and 10 is a check ring. DETAILED DESCRIPTION
[0022] In order to clearly illustrate the technical features of the scheme, the utility model will be described in detail below through specific implementation modes and in combination with its drawings.
[0023] For example, Figures 1-4 The two-cantilever foil type radial bearing comprises a top foil 1 arranged in a ring shape, both ends of the top foil 1 are free ends and provided with top foil constraint edges 2, the top foil 1 is installed in a bearing seat 3, the top foil constraint edges 2 at both ends of the top foil 1 are movably inserted in a first groove 4 and a second groove 5 in the bearing seat 3 respectively, a first wave foil 6 and a second wave foil 7 are arranged between the top foil 1 and the bearing seat 3, each wave foil is pre-tighteningly assembled between the top foil 1 and the bearing seat 3, both ends of the first wave foil 6 and the second wave foil 7 are provided with wave foil constraint edges 8, one wave foil constraint edge 8 of the first wave foil 6 is movably inserted in the first groove 4, the other wave foil constraint edge 8 of the first wave foil 6 is movably inserted in a third groove 9 opposite to the first groove 4, one wave foil constraint edge 8 of the second wave foil 7 is movably inserted in the second groove 5, the other wave foil constraint edge 8 of the second wave foil 7 is movably inserted in the third groove 9.
[0024] The wave heights of the first wave foil 6 and the second wave foil 7 are consistent, and there is no need to distinguish the positive and negative conversion, and the use is more convenient.
[0025] The original radii of the first wave foil 6 and the second wave foil 7 are greater than the radii in the actual assembly state, after the assembly is completed, the first wave foil 6 and the second wave foil 7 are tightly attached to the bearing seat 3 on the outside and tightly matched with the top foil 1 on the inside under the constraint of the top foil 1.
[0026] The first wave foil 6, the second wave foil 7 and the top foil 1 are integrally stamped and formed.
[0027] The first groove 4 and the second groove 5 are arranged close to each other, and the first groove 4, the second groove 5 and the third groove 9 are used for constraining the radial rotation of the top foil 1 and the wave foils.
[0028] The first groove 4, the second groove 5 and the third groove 9 are respectively arranged through the inner wall of the bearing seat 3 along the axial direction.
[0029] The inner sides of both ends of the bearing seat 3 are respectively provided with a stop ring 10 for limiting the axial displacement of the top foil 1, the first wave foil 6 and the second wave foil 7.
[0030] The inner surface of the top foil 1 is sprayed with a wear-resistant coating, the wear-resistant coating comprises a molybdenum disulfide coating or a polytetrafluoroethylene coating, which can reduce wear and improve service life.
[0031] The utility model discloses a first wave foil 6 both ends' wave foil restraint edge 8 respectively inserts in first recess 4 and third recess 9, and the second wave foil 7 both ends' wave foil restraint edge 8 respectively inserts in second recess 5 and third recess 9, then again top foil 1 both ends' top foil restraint edge 2 respectively inserts in first recess 4 and second recess 5, finally installs the baffle ring 10 in bearing seat 3 both ends inboard, and top foil 1, first wave foil 6 and second wave foil 7 both ends are free end, more easily assemble, and deformation amount is bigger, when certain wave foil is stressed, another wave foil will not be influenced, and the whole use is not affected, when radial air bearing works, first wave foil 6 and second wave foil 7 will take place slight elastic deformation under the gas film force, and first wave foil 6 and second wave foil 7 take place slight sliding between bearing seat 3 and top foil 1, provide enough damping for bearing high -speed operation, and the stability of rotor operation is guaranteed to support the rotor of center.
[0032] The above detailed description cannot be regarded as the limitation of the protection scope of the utility model, and any alternative improvement or change made by the person skilled in the art to the embodiment of the utility model falls within the protection scope of the utility model.
[0033] The utility model is not detailed, and it is the known technology of the person skilled in the art.
Claims
1. A two-cusp wave foil radial bearing characterized by: The top foil is integrally arranged in a ring shape, both ends of the top foil are free ends and provided with top foil constraint edges, the top foil is installed in the bearing seat, the top foil constraint edges of both ends of the top foil are respectively movably inserted in the first groove and the second groove in the bearing seat, the first wave foil and the second wave foil are provided between the top foil and the bearing seat, each wave foil is respectively pre-tightly assembled between the top foil and the bearing seat, both ends of the first wave foil and the second wave foil are provided with wave foil constraint edges, one wave foil constraint edge of the first wave foil is movably inserted in the first groove, the other wave foil constraint edge of the first wave foil is movably inserted in the third groove opposite to the first groove, one wave foil constraint edge of the second wave foil is movably inserted in the second groove, the other wave foil constraint edge of the second wave foil is movably inserted in the third groove.
2. A two-lobe wave foil radial bearing according to claim 1, wherein: The wave heights of the first wave foil and the second wave foil are consistent.
3. A two-lobe wave foil radial bearing according to claim 1, wherein: The original radii of the first wave foil and the second wave foil are greater than the radii in the actual assembly state.
4. A two-lobe wave foil radial bearing according to claim 1, wherein: The first wave foil, the second wave foil and the top foil are integrally stamped and formed.
5. A two-lobe wave foil radial bearing according to claim 1, wherein: The first groove and the second groove are arranged close to each other.
6. A two-chop wave foil type radial bearing according to claim 1, characterized in that: The first groove, the second groove and the third groove are respectively arranged along the axial direction and penetrate the inner wall of the bearing seat.
7. A two-chop wave foil type radial bearing according to claim 1, characterized in that: The inner sides of both ends of the bearing seat are respectively provided with stop rings for limiting the axial displacement of the top foil, the first wave foil and the second wave foil.
8. A two-chop wave foil type radial bearing according to claim 1, characterized in that: The inner surface of the top foil is sprayed with a wear-resistant coating.
9. A two-chop wave foil type radial bearing according to claim 8, characterized in that: The wear-resistant coating comprises a molybdenum disulfide coating or a polytetrafluoroethylene coating.