CN216278965U

CN216278965U - Reversible rotary air suspension thrust bearing

Info

Publication number: CN216278965U
Application number: CN202123144192.8U
Authority: CN
Inventors: 李志远; 赵振
Original assignee: Hainan Jirui Haohan Power System Technology Co ltd
Current assignee: Hainan Jirui Haohan Power System Technology Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-12
Anticipated expiration: 2031-12-14

Abstract

A reversible rotary air suspension thrust bearing belongs to the technical field of air suspension bearing design. The problem of among the prior art air suspension footstep bearing can only unidirectional rotation is solved. The technical points are as follows: the foil type thrust bearing comprises a thrust bearing back plate, a plurality of elastic supporting foils and upper foils, wherein the plurality of upper foils are annularly arrayed on the thrust bearing back plate, and each upper foil comprises a guide slope, a working surface and a reverse slope which are integrally manufactured clockwise; the guide slope is a fixed end and is fixed with the thrust bearing back plate; the reverse slope is a free end and is contacted with the thrust bearing back plate or a gap is reserved between the reverse slope and the thrust bearing back plate; an elastic supporting foil is arranged between the working surface and the thrust bearing back plate. The guide slope and the reverse slope designed on the upper foil form a double-gradient design, a new function of allowing the thrust bearing to reversely rotate is realized, and the damage to the air suspension bearing and the equipment is effectively prevented under the condition that the equipment reversely runs.

Description

Reversible rotary air suspension thrust bearing

Technical Field

The utility model relates to an air suspension thrust bearing, in particular to a reversible rotary air suspension thrust bearing, and belongs to the technical field of air suspension bearing design.

Background

The air suspension thrust bearing is a working mode that an air film is formed between the thrust bearing and a rotating part (usually a thrust disc on a main shaft) in a normal working state to bear axial load, and compared with a traditional oil bearing, the air suspension thrust bearing has the characteristics of high rotating speed, low noise, no need of oil circuit lubrication and no contact (non-start-stop state). The air suspension thrust bearing is widely applied to high-speed rotating machinery with tens of thousands of revolutions per minute and even hundreds of thousands of revolutions per minute.

Because of the current thrust bearing design, one end of the upper foil is fixed on the back plate and is called as a fixed end; the other end is not fixed and is called as a free end, only one gradient (from low to high) exists from the fixed end to the free end, the gradient conforms to the rotating direction, when the reverse rotation occurs, the air resistance generated by the reverse rotation can lift the upper foil of the bearing at the free end, contact friction is generated between the upper foil and the thrust disc, and finally the thrust bearing is damaged. The air suspension bearing thrust structure does not have reversible rotation characteristics, and under the condition that equipment is occasionally reversed or needs to be reversed, defects of the existing design are exposed, and unnecessary damage is caused to the bearing and the whole equipment.

SUMMERY OF THE UTILITY MODEL

In view of the above facts, the present invention aims to solve the problem that the air suspension thrust bearing in the prior art can only rotate in one direction, and further designs a reversible air suspension thrust bearing, and by utilizing the double-gradient design of the upper foil, a new function of allowing the thrust bearing to rotate reversely is realized.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the air suspension thrust bearing capable of rotating reversely comprises a thrust bearing back plate, a plurality of elastic supporting foils and a plurality of upper foils;

the number of the elastic supporting foils is consistent with that of the upper foils, and the plurality of upper foils are annularly arrayed on the thrust bearing back plate;

each upper foil comprises a guide slope, a working face and a reverse slope which are integrally manufactured clockwise;

the guide slope is a fixed end and is fixed with the thrust bearing back plate;

the reverse slope is a free end and is contacted with the thrust bearing back plate, or a gap is reserved between the reverse slope and the thrust bearing back plate;

and an elastic supporting foil is arranged between the working surface and the thrust bearing back plate.

Further, the elastic supporting foil is formed by pressing through a mold. So set up, be convenient for make the shaping.

Further, the elastic support foil is a corrugated foil.

Further, the elastic supporting foil is an arc corrugated foil or a trapezoid corrugated foil. The device is suitable for different working condition requirements.

Further, the slope of the guide slope is 5 degrees to 30 degrees. The device is suitable for different working condition requirements.

Further, the gradient of the reverse slope is 5-45 degrees. The device is suitable for different working condition requirements.

Further, the clearance between the reverse slope and the thrust bearing back plate is less than or equal to 0.05 mm.

Further, the number of the upper foils is three, six, eight or twelve, and the upper foils are in a fan-shaped structure. The device is suitable for different working condition requirements.

Further, the working face is arranged in parallel with the thrust bearing back plate. Thus, in the high-speed operation of the device, the plane of the component corresponding to the device forms a suspended gas film.

Furthermore, the front end of the elastic support foil is a fixed end and is fixedly connected with the thrust bearing back plate; the back end of the elastic support foil is a free end and is contacted with the thrust bearing back plate, and the free end of the elastic support foil and the reverse slope are positioned on the same side.

The utility model achieves the following effects:

the reversible air suspension thrust bearing of the utility model, the guide slope and the reverse slope designed by the upper foil form a double-gradient design, realizes a new function of allowing the thrust bearing to reversely rotate, and effectively prevents the air suspension bearing and the equipment from being damaged under the condition of reverse operation of the equipment. If the gradient design (namely the reverse slope) of the free end of the upper foil is not available, the upper foil at the free end can be lifted by the reverse operation of the equipment, a stable gas film cannot be formed, the upper foil and the thrust disc generate heat through friction, and finally the upper foil is melted and damaged, so that the thrust bearing is completely failed. The utility model provides an air suspension bearing thrust structure capable of reversely rotating for an axial thrust part of high-speed running equipment.

Drawings

FIG. 1 is a schematic structural view of a reversible rotary air bearing of the present invention;

fig. 2 is a sectional view a-a of fig. 1.

Wherein:

1-thrust bearing backing plate; 2-an elastic support foil; 3-top foil; 31-a guide ramp; 32-a working surface; 33-reverse slope.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying fig. 1 in conjunction with an embodiment.

Preferred embodiments of the present invention are explained in detail below with reference to the accompanying drawings.

Example 1: the air suspension thrust bearing capable of rotating reversely comprises a thrust bearing back plate 1, three elastic supporting foils 2 and three upper foils 3; three upper foils 3 are annularly arrayed on the thrust bearing back plate 1, and the upper foils 3 are of a fan-shaped structure; each upper foil 3 comprises a guide slope 31, a working face 32 and a reverse slope 33 integrally manufactured clockwise; the guide slope 31 is a fixed end and is fixed with the thrust bearing back plate 1, and the gradient of the guide slope 31 is 5 degrees; the reverse slope 33 is a free end and is in contact with the thrust bearing back plate 1, and the gradient of the reverse slope 33 is 5 degrees; the working surface 32 is arranged in parallel with the thrust bearing back plate 1, an elastic supporting foil 2 is arranged between the working surface 32 and the thrust bearing back plate 1, and the elastic supporting foil 2 is an arc corrugated foil and is formed by pressing through a die; the front end of the elastic supporting foil 2 is a fixed end and is fixedly connected with the thrust bearing back plate 1; the back end of the elastic supporting foil 2 is a free end and is contacted with the thrust bearing back plate 1, and the free end of the elastic supporting foil 2 and the reverse slope 33 are positioned on the same side.

Example 2: the difference from the embodiment 1 is that the number of the elastic support foils 2 and the upper foils 3 is six, the elastic support foils 2 are trapezoidal corrugated foils, the slope of the guide slope 31 is 15 °, the reverse slope 33 is a free end, and the slope of the reverse slope 33 is 15 °.

Example 3: the difference from the

embodiment

1 or 2 is that the number of the elastic support foils 2 and the upper foils 3 is eight, the slope of the guide slope 31 is 30 °, and the slope of the reverse slope 33 is 30 °.

Example 4: the difference from the embodiment 1, the embodiment 2 or the embodiment 3 is that the number of the elastic supporting foils 2 and the upper foils 3 is twelve, and a gap is left between the reverse slope 33 and the thrust bearing back plate 1, and the gap is 0.05 mm.

Example 5: the difference from example 4 is that the gap is 0.03mm

The working surface 32 in the above embodiment is parallel to the upper plane of the thrust bearing back plate 1, and the plane of the component corresponding to the device forms a suspended air film during high-speed operation of the device. The guiding slope 31 is fixed on the thrust bearing back plate 1 at the cut-in end of the working surface 32 in the device running direction, and is in the same direction as the fixed end of the elastic supporting foil 2, and corresponding components are guided into the working surface 32 when the device starts to run at high speed. Said counter-slope 33, distributed at the other end of the work plane 32, acts as a free end, co-existing with the free end of the flexible support foil 2, guiding the corresponding components of the device along the slope into the work plane in case of occasional and required retrograde movements of the device.

When the equipment is in forward operation, the tangential force of the equipment operation is cut into from the fixed end of the air suspension thrust bearing which can rotate reversely, and is guided into the working surface by the guide slope, and the normal equipment operation is started. When the equipment occasionally runs reversely or needs to run reversely, the reverse speed of the equipment is cut into the working face from the free end, and the equipment can run along the reverse slope without obstruction in the reverse running due to the existence of the reverse slope at the free end.

The above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. Reversible pivoted air suspension footstep bearing, its characterized in that: the air suspension thrust bearing capable of rotating reversely comprises a thrust bearing back plate (1), a plurality of elastic supporting foils (2) and a plurality of upper foils (3);

the number of the elastic supporting foils (2) is consistent with that of the upper foils (3), and the plurality of upper foils (3) are annularly arrayed on the thrust bearing back plate (1);

each upper foil (3) comprises a guide slope (31), a working face (32) and a reverse slope (33) which are integrally manufactured clockwise;

the guide slope (31) is a fixed end and is fixed with the thrust bearing back plate (1);

the reverse slope (33) is a free end and is contacted with the thrust bearing back plate (1), or a gap is reserved between the reverse slope and the thrust bearing back plate (1);

an elastic supporting foil (2) is arranged between the working surface (32) and the thrust bearing back plate (1).

2. A reversible air suspension thrust bearing according to claim 1, wherein: the elastic supporting foil (2) is formed by pressing through a die.

3. A reversible air suspension thrust bearing according to claim 1, wherein: the elastic supporting foil (2) is a corrugated foil.

4. A reversible air suspension thrust bearing according to claim 3, wherein: the elastic supporting foil (2) is an arc corrugated foil or a trapezoid corrugated foil.

5. A reversible air suspension thrust bearing according to claim 1, wherein: the gradient of the guide slope (31) is 5-30 degrees.

6. A reversible air suspension thrust bearing according to claim 5, wherein: the gradient of the reverse slope (33) is 5-45 degrees.

7. A reversible air suspension thrust bearing according to claim 1, wherein: the clearance between the reverse slope (33) and the thrust bearing back plate (1) is less than or equal to 0.05 mm.

8. A reversible air suspension thrust bearing according to claim 1, wherein: the number of the upper foils (3) is three, six, eight or twelve, and the upper foils (3) are of a fan-shaped structure.

9. A reversible air suspension thrust bearing according to claim 1, wherein: the working surface (32) and the thrust bearing back plate (1) are arranged in parallel.

10. A reversible air suspension thrust bearing according to any one of claims 1 to 9, wherein: the front end of the elastic supporting foil (2) is a fixed end and is fixedly connected with the thrust bearing back plate (1); the rear end of the elastic supporting foil (2) is a free end and is in contact with the thrust bearing back plate (1), and the free end of the elastic supporting foil (2) and the reverse slope (33) are located on the same side.