CN214788605U - Connection structure of bearing and axis body - Google Patents
Connection structure of bearing and axis body Download PDFInfo
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- CN214788605U CN214788605U CN202120918919.4U CN202120918919U CN214788605U CN 214788605 U CN214788605 U CN 214788605U CN 202120918919 U CN202120918919 U CN 202120918919U CN 214788605 U CN214788605 U CN 214788605U
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Abstract
The utility model provides a connection structure of bearing and axis body relates to fluid machinery tribology technical field, has solved among the prior art axis body and has stopped the in-process at work, can produce wearing and tearing rather than complex bearing, easily makes the technical problem that bearing life-span reduces. This connection structure includes the bearing, the axis body, first wearing layer and second wearing layer, the bearing has first connection face, the axis body has the second and connects the face, bearing and axis body are connected face cooperation with the second through first connection face and are connected, first wearing layer sets up on first connection face, and the second wearing layer sets up on the second is connected the face, first wearing layer and second wearing layer can carry out the contact cooperation, can make and carry out wearing and tearing stage by stage between bearing and the axis body, can greatly reduce the first connection face and the second and connect the face between frictional contact, reduce coefficient of friction between the two, thereby reduce the wearing and tearing of bearing, promote the life of bearing.
Description
Technical Field
The utility model belongs to the technical field of fluid machinery tribology technique and specifically relates to a connection structure of bearing and axis body is related to.
Background
The foil type gas bearing refers to a sliding bearing in which a shaft is suspended by hydrodynamic pressure or static pressure using an elastic foil, and has been used in the field of high-speed, non-lubricated turbomachinery in foreign countries. Compared with a rolling bearing and a common sliding bearing, the foil type gas bearing can bear higher rotating speed and temperature and is not limited by a lubricating system and a cooling system. Meanwhile, the bearing 1 takes the ambient air as a lubricating medium, so that the use requirement of oilless machinery can be met, and the environment is more environment-friendly.
Referring to fig. 1, which is a schematic view of a foil type gas bearing takeoff, when a shaft body 2 as a moving member forms a convergent gap with an inner surface of a bearing 1, and the moving direction of the moving member moves from one side of a larger gap to one side of a smaller gap (the gap is a distance space between an outer surface of the shaft body 2 and the inner surface of the bearing 1), an amount of air entering the gap is necessarily larger than an amount of air flowing out of the gap, and an excess amount of air entering the wedge-shaped gap is necessarily extruded from two cross sections of an inlet and an outlet, so that a flow driven by pressure is generated, and the flow becomes a pressure flow. At this time, the flow of the fluid in the wedge-shaped gap is formed by superposing shear flow and pressure flow, and the gas has certain compressibility, so that the velocity curve of the inlet gas flow is concave, and the outlet is convex. As long as the environment provides a gas medium with a certain viscosity and the relative speed between the shaft body 2 and the inner surface of the bearing 1 is sufficiently high, the dynamic pressure effect generated by the fluid flowing into the wedge-shaped gap can exist continuously and stably, i.e. the hydrodynamic pressure lubrication wedge effect, so that the shaft body 2 can take off smoothly after the rotating speed of the shaft body 2 reaches the take-off rotating speed. During the takeoff process of the shaft body 2, a wedge-shaped gap is formed between the bearing 1 and the shaft body 2 in the initial stage and a stable dynamic pressure air film 8 is formed, so that the friction torque between the shaft body 2 and the bearing 1 can be rapidly increased along with the increase of the rotating speed. With the continuous increase of the rotating speed, when the rotating speed reaches the takeoff rotating speed, the wedge-shaped clearance between the bearing 1 and the shaft body 2 is changed into stabilityThe lubrication between the bearing 1 and the shaft body 2 is changed to gas lubrication by the constant dynamic pressure gas film 8, so that the friction torque of the shaft body 2 is rapidly reduced. Thus, reference is made to fig. 2, which is a moment diagram of a shaft 2 for normal takeoff, t1-t2For takeoff phase, t3-t4For the stop phase, it is known that the moment of the shaft body 2 has a waveform which increases sharply at the beginning and then falls back quickly in both the take-off and stop phases.
Because foil type gas bearing all can have certain degree of wearing and tearing at the work in-process of opening and stopping, in the operating mode that equipment such as fuel cell air compressor machine stopped repeatedly, the life-span of bearing 1 can receive very big challenge. Although the wear of the bearing 1 or the shaft body 2 is reduced by adding a paint layer or other materials on the bearing 1 or the shaft body 2, the paint layer is worn away quickly, and the service life of the bearing 1 is still low.
Therefore, how to solve the technical problem that in the prior art, the shaft body can wear the bearing matched with the shaft body in the process of starting and stopping during work, so that the service life of the bearing is easily reduced becomes an important technical problem to be solved by the person in the field.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a connection structure of bearing and axis body has solved among the prior art axis body and has opened the start-stop in-process at work, can produce wearing and tearing rather than complex bearing, easily makes the technical problem that bearing life-span reduces. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a connection structure of bearing and axis body, include: the bearing and the shaft body are matched and connected with each other through the first connecting surface and the second connecting surface; the first connecting surface is provided with a first wear-resistant layer, the second connecting surface is provided with a second wear-resistant layer, and the first wear-resistant layer and the second wear-resistant layer can be in contact fit.
Preferably, the first wear-resistant layer and the second wear-resistant layer are made of wear-resistant materials, and the friction coefficient between the first wear-resistant layer and the second wear-resistant layer, the friction coefficient between the first wear-resistant layer and the second connection surface, and the friction coefficient between the second wear-resistant layer and the first connection surface are all smaller than the friction coefficient between the first connection surface and the second connection surface.
Preferably, the first wear-resistant layer and the second wear-resistant layer are made of the same wear-resistant material or different wear-resistant materials with different friction coefficients.
Preferably, the wear resistance of the first wear layer is higher than the wear resistance of the second wear layer.
Preferably, the first wear-resistant layer and the second wear-resistant layer are both coating structures coated on corresponding connecting surfaces.
Preferably, the material of the first wear-resistant layer and the material of the second wear-resistant layer are any one of teflon and molybdenum disulfide.
Preferably, the bearing is a radial foil type gas bearing, and the radial foil type gas bearing is sleeved outside the shaft body in a penetrating manner.
Preferably, the first connection surface is an inner circumferential surface of the radial foil gas bearing, and the second connection surface is an outer circumferential surface of the shaft body.
Preferably, the bearing is an axial foil type gas thrust bearing, a protruding shaft section extending radially outwards is arranged on the shaft body, and the axial foil type gas thrust bearing is arranged on two sides of the protruding shaft section.
Preferably, the first connecting surface is an outer side surface of a top foil of the axial foil gas thrust bearing, and the second connecting surface is two end surfaces of the boss section.
The utility model discloses compare in prior art and have following beneficial effect:
the utility model provides a connection structure of bearing and axis body, through add first wearing layer and second wearing layer between the first connection face of bearing and the second connection face of axis body, can turn into the wearing and tearing between first wearing layer and second wearing layer and between first wearing layer and second connection face or between second wearing layer and first connection face between first wearing layer and second wearing layer, can reduce the coefficient of friction between two connection faces, and in the course of the work, the first stage is the wearing and tearing between first wearing layer and second wearing layer at first, the second stage is the wearing and tearing between first wearing layer and second wearing layer and the corresponding connection face, the third stage is the wearing and tearing between first connection face and the second connection face, until finally damaging bearing and axis body, can reduce the frictional contact between first connection face and the second connection face very greatly, the friction coefficient between the bearing and the bearing is reduced, so that the abrasion of the bearing is reduced, the service life of the bearing is greatly prolonged, and the service life of the bearing is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an expanded view of a prior art foil gas bearing takeoff principle;
FIG. 2 is a moment diagram of a prior art shaft for normal takeoff;
fig. 3 is a schematic position diagram of the first wear-resistant layer and the second wear-resistant layer provided by the embodiment of the present invention;
fig. 4 is a schematic view of the installation of the bearing and the shaft according to the embodiment of the present invention;
fig. 5 is a schematic view illustrating an installation of a radial foil type gas bearing and a shaft body according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating an installation of an axial foil gas thrust bearing and a shaft body according to an embodiment of the present invention.
FIG. 1-bearing; 2-a shaft body; 3-a first connection face; 4-a second connection face; 5-a first wear layer; 6-a second wear layer; 7-a camshaft section; 8-dynamic pressure gas film.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
An object of the utility model is to provide a connection structure of bearing and axis body has solved among the prior art axis body and has opened the start-stop in-process at work, can produce wearing and tearing rather than complex bearing, easily makes the technical problem that bearing life-span reduces.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.
Referring to fig. 3-4, the utility model provides a connection structure of bearing and axis body, including bearing 1, axis body 2, first wearing layer 5 and second wearing layer 6, bearing 1 has first connection face 3, and axis body 2 has the second and connects face 4, and bearing 1 and axis body 2 are connected face 4 cooperations through first connection face 3 and second and are connected, and in the actual course of working, the position that first connection face 3 and second are connected face 4 is confirmed according to bearing 1 and axis body 2's the cooperation mode of being connected, two are connected the face promptly and are two surfaces that can contact after bearing 1 and axis body 2 both are connected. The first connecting surface 3 is provided with a first wear-resistant layer 5, the second connecting surface 4 is provided with a second wear-resistant layer 6, the first wear-resistant layer 5 and the second wear-resistant layer 6 can be in contact fit, and the first wear-resistant layer 5 and the second wear-resistant layer 6 can be arranged into one layer or a plurality of layers, so that the utility model adds the first wear-resistant layer 5 and the second wear-resistant layer 6 between the connecting fit surfaces between the bearing 1 and the shaft body 2, can convert the abrasion between the first connecting surface 3 and the second connecting surface 4 into the abrasion between the first wear-resistant layer 5 and the second wear-resistant layer 6 and between the first wear-resistant layer 5 and the second connecting surface 4 or between the second wear-resistant layer 6 and the first connecting surface 3, can reduce the friction coefficient between the two connecting surfaces, and in the working process, the first stage is the abrasion between the first wear-resistant layer 5 and the second wear-resistant layer 6 and the corresponding connecting surface, and the second stage is the abrasion between the first wear-resistant layer 5 and the second wear-resistant layer 6 and the corresponding connecting surface, the third phase is the wearing and tearing between the first face 3 of being connected and the second face 4 until finally damaging bearing 1 and axis body 2, can greatly reduce the first face 3 of being connected and the second face of being connected between 4 frictional contact, reduce coefficient of friction between the two, thereby reduce the wearing and tearing of bearing 1, the live time of bearing 1 has greatly been prolonged, promote bearing 1's life, it stops the in-process at work to have solved the axis body among the prior art, can produce wearing and tearing to rather than complex bearing, easily make the technical problem that bearing life reduces.
The technical solution of the present invention will be described in detail with reference to the following specific embodiments.
Example 1:
referring to fig. 3-4, the connection structure of the bearing and the shaft body provided in this embodiment includes a bearing 1 and a shaft body 2, the bearing 1 has a first connection surface 3, the shaft body 2 has a second connection surface 4, and the bearing 1 and the shaft body 2 are connected to the second connection surface 4 through the first connection surface 3; wherein, be provided with first wearing layer 5 on the first connection face 3, and be provided with second wearing layer 6 on the second connection face 4, first wearing layer 5 and second wearing layer 6 can carry out the contact cooperation, wherein, first wearing layer 5 and second wearing layer 6 are wear-resisting material, the coefficient of friction between first wearing layer 5 and the second wearing layer 6, the coefficient of friction between first wearing layer 5 and the second connection face 4, the coefficient of friction between second wearing layer 6 and the first connection face 3 all is less than the coefficient of friction between first connection face 3 and the second connection face 4, can greatly reduce the coefficient of friction between first connection face 3 and the second connection face 4, reduce and wear to bearing 1.
Further, first wearing layer 5 and second wearing layer 6 adopt the same kind of wear-resisting material that has different coefficient of friction to make or both adopt the different kind of wear-resisting material that has different coefficient of friction to make and form, first wearing layer 5 and second wearing layer 6 can use the different models of the same kind of wear-resisting material promptly, the surface can set up different roughness, it corresponds different coefficient of friction, or, first wearing layer 5 and second wearing layer 6 are the wear-resisting material of different kinds, can have more stable and different coefficient of friction, two kinds of implementation modes all can realize wear-resisting effect stage by stage.
Further, the wearability of first wearing layer 5 is higher than the wearability of second wearing layer 6, so set up, in the course of the work, first stage mainly is the contact between two wearing layers for second wearing layer 6 on the second connection face 4 of axis body 2 wears earlier, the second stage is the contact between first wearing layer 5 on the first connection face 3 of bearing 1 and the second connection face 4, makes the first wearing layer 5 of bearing 1 wear again, can protect bearing 1 by bigger degree.
Further, first wearing layer 5 and second wearing layer 6 are the coating structure of coating on the face is connected in the correspondence, and processing convenient to use more can adapt to the shape of axis body 2 and bearing 1, and wear-resisting effectual.
Furthermore, the material of the first wear-resistant layer 5 and the material of the second wear-resistant layer 6 are both any one of teflon and molybdenum disulfide, and teflon, namely Polytetrafluoroethylene (PTFE), has an extremely low friction coefficient, is high-temperature resistant, and has a better lubricating effect. The molybdenum disulfide has extremely low friction coefficient, small friction resistance generated between contact surfaces and good wear resistance.
Example 2:
referring to fig. 3-5, the connection structure of the bearing and the shaft body provided in this embodiment includes a bearing 1 and a shaft body 2, the bearing 1 has a first connection surface 3, the shaft body 2 has a second connection surface 4, and the bearing 1 and the shaft body 2 are connected to the second connection surface 4 through the first connection surface 3; wherein, be provided with first wearing layer 5 on the first connection face 3 to be provided with second wearing layer 6 on the second connection face 4, first wearing layer 5 and second wearing layer 6 can carry out the contact cooperation, and wherein, bearing 1 is radial foil formula gas bearing 1, and the axis body 2 wears to overlap in radial foil formula gas bearing 1's inboard, and bearing 1 can effectively support the radial of axis body 2.
Further, the first connecting surface 3 is the inner side circumferential surface of the radial foil type gas bearing 1, the second connecting surface 4 is the outer side circumferential surface of the shaft body 2, and the first wear-resistant layer 5 and the second wear-resistant layer 6 are respectively coated on the first connecting surface 3 and the second connecting surface 4, so that the wear resistance between the inner side circumferential surface of the radial foil type gas bearing 1 and the outer side circumferential surface of the shaft body 2 can be increased, and the wear is reduced.
Example 3:
referring to fig. 3-4 and fig. 6, the connection structure of the bearing and the shaft body provided in this embodiment includes a bearing 1 and a shaft body 2, the bearing 1 has a first connection surface 3, the shaft body 2 has a second connection surface 4, and the bearing 1 and the shaft body 2 are connected with the second connection surface 4 through the first connection surface 3; wherein, be provided with first wearing layer 5 on the first connection face 3 to be provided with second wearing layer 6 on the second connection face 4, first wearing layer 5 and second wearing layer 6 can contact the cooperation, and wherein, bearing 1 is axial foil formula gas thrust bearing 1, is provided with radial outside protruding axle section 7 that extends on the axis body 2, and axial foil formula gas thrust bearing 1 sets up in the both sides of protruding axle section 7, can effectively support the axial direction of axis body 2.
Further, the first connection surface 3 is the outer side surface of the top foil of the axial foil gas thrust bearing 1, and the second connection surface 4 is the two end surfaces of the protruding shaft section 7, so that the wear resistance between the outer side surface of the top foil of the axial foil gas thrust bearing 1 and the two end surfaces of the protruding shaft section 7 can be increased, and the wear can be reduced.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A connection structure of a bearing and a shaft body is characterized by comprising the bearing (1) and the shaft body (2), wherein the bearing (1) is provided with a first connection surface (3), the shaft body (2) is provided with a second connection surface (4), and the bearing (1) and the shaft body (2) are connected with the second connection surface (4) in a matching mode through the first connection surface (3);
the first connecting surface (3) is provided with a first wear-resistant layer (5), the second connecting surface (4) is provided with a second wear-resistant layer (6), and the first wear-resistant layer (5) and the second wear-resistant layer (6) can be in contact fit.
2. The connecting structure of a bearing and a shaft body according to claim 1, wherein the first wear-resistant layer (5) and the second wear-resistant layer (6) are made of wear-resistant materials, and a friction coefficient between the first wear-resistant layer (5) and the second wear-resistant layer (6), a friction coefficient between the first wear-resistant layer (5) and the second connecting surface (4), and a friction coefficient between the second wear-resistant layer (6) and the first connecting surface (3) are smaller than a friction coefficient between the first connecting surface (3) and the second connecting surface (4).
3. The connecting structure of a bearing and a shaft body according to claim 2, wherein the first wear-resistant layer (5) and the second wear-resistant layer (6) are made of the same wear-resistant material or different wear-resistant materials with different friction coefficients.
4. A bearing and shaft connection according to claim 3, characterised in that the wear resistance of the first wear resistant layer (5) is higher than the wear resistance of the second wear resistant layer (6).
5. A bearing and shaft body connection according to claim 2, characterized in that the first wear resistant layer (5) and the second wear resistant layer (6) are both coated structures coated on the corresponding connection surfaces.
6. A connection structure of a bearing and a shaft body according to any one of claims 1 to 5, wherein the material of the first wear-resistant layer (5) and the material of the second wear-resistant layer (6) are both any one of Teflon and molybdenum disulfide.
7. The connection structure of the bearing and the shaft body is characterized in that the bearing (1) is a radial foil type gas bearing which is sleeved on the outer side of the shaft body (2).
8. A bearing and shaft body connection according to claim 7, characterised in that the first connection face (3) is the inner circumferential face of the radial foil gas bearing and the second connection face (4) is the outer circumferential face of the shaft body (2).
9. A bearing and shaft body connecting structure according to claim 1, wherein the bearing (1) is an axial foil type gas thrust bearing (1), a protruding shaft section (7) extending radially outwards is arranged on the shaft body (2), and the axial foil type gas thrust bearing (1) is arranged on two sides of the protruding shaft section (7).
10. A bearing and shaft connection according to claim 9, characterised in that the first connection surface (3) is the outer side surface of the top foil of the axial foil gas thrust bearing (1) and the second connection surface (4) is the two end surfaces of the camshaft section (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918919.4U CN214788605U (en) | 2021-04-29 | 2021-04-29 | Connection structure of bearing and axis body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918919.4U CN214788605U (en) | 2021-04-29 | 2021-04-29 | Connection structure of bearing and axis body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214788605U true CN214788605U (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120918919.4U Active CN214788605U (en) | 2021-04-29 | 2021-04-29 | Connection structure of bearing and axis body |
Country Status (1)
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|---|---|
| CN (1) | CN214788605U (en) |
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2021
- 2021-04-29 CN CN202120918919.4U patent/CN214788605U/en active Active
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