CN210141269U - Tilting pad thrust bearing of tail gas expander - Google Patents

Abstract

The utility model provides a tail gas expander tilting pad thrust bearing, with the skew a bit of the supporting muscle at tile piece back symmetry center, skew direction is the terminal position of tile piece for thrust disc rotation, and the bearing during operation is used in the bearing surface and the axle journal surface formation bearing oil wedge with the help of the fluid dynamic pressure of lubricating oil film, and it makes two surfaces break away from the contact completely. The oil film thickness at the inlet and outlet of the oil wedge is a main parameter influencing the bearing capacity of the tile. After the position of the supporting rib is adjusted, along with the change of the working condition of the bearing, the inclination of the tile surface and the thickness of an oil film can be changed, and more heat generated by friction can be taken away, so that the temperature between the bearing tile and the thrust disc is reduced, the carbon deposition phenomenon of the bearing tile is reduced, and the bearing tile is also superior to other thrust bearings.

Description

Tilting pad thrust bearing of tail gas expander

Technical Field

The utility model relates to a thrust bearing technical field particularly, especially, relate to tail gas expander tilting pad thrust bearing.

Background

The air compressor is the core of PTA device moves equipment, and thrust bearing is the key spare part of mechanical rotation, and bearing once the problem can cause the air compressor machine to jump and stop, PTA device production compelled to terminate, and economic loss is difficult to estimate. In order to realize the long-term stable operation of the core equipment of the whole PTA device, namely an air compressor, the impact on the production of the PTA device caused by equipment problems is reduced.

The basic structure of old-fashioned bearing has the supporting rib of a symmetric center at the tile back, and the tile is inclined around the supporting rib swing under the oil pressure effect to form the wedge clearance between thrust dish and thrust tile, when the rotor was rotatory, the wedge clearance was constantly taken into to oil, formed the dynamic pressure oil film that has compressive capacity, in order to bear the axial thrust of tail gas expander, and transmit thrust for the bearing frame.

The actual operation on site proves that: the old design can not meet the requirement of long-term stable operation and can generate carbon deposition phenomenon. The bearing needs to be cleaned once every year of operation.

Disclosure of Invention

According to the technical problem, after analysis, the carbon deposit is caused by high temperature, the lubricating oil quantity of a pressure oil film needs to be adjusted when the bearing runs for a long time, the heat generated by the bearing can be taken away by increasing the oil quantity, so that the carbon deposit phenomenon is avoided, and the tilting pad thrust bearing of the tail gas expander with a new structure is developed. The utility model discloses under the prerequisite that does not change the expander bearing frame size, above-mentioned problem is solved through the structure of adjustment bearing tile piece in final decision.

The utility model discloses a technical means as follows:

a tail gas expander tilting pad thrust bearing comprising: the fuel injection device comprises a base, pads assembled inside the base, a mirror plate arranged above the pads and a high-pressure fuel injection nozzle arranged between adjacent pads and used for injecting fuel to the pads;

the position of the supporting rib of the pad is arranged in a manner of offsetting towards the rotating terminal direction of the pad relative to the thrust disc.

The extending direction of the supporting ribs of the pad is the radial direction which takes the geometric center of the thrust bearing as the central point.

The supporting ribs deviate from the middle position to the end point direction of the rotation of the tile relative to the thrust disc according to the golden section line.

Adopt above-mentioned technical scheme the utility model discloses, the bearing rib at tile piece back symmetry center is skew a bit, and skew direction is the terminal position of tile piece for the thrust disk is rotatory, and the bearing during operation is used in the fluid dynamic pressure of lubricating film and is formed between tile face and axle journal surface and bear the weight of the oil wedge, and it makes two surfaces break away from the contact completely. The oil film thickness at the inlet and outlet of the oil wedge is a main parameter influencing the bearing capacity of the tile. After the position of the supporting rib is adjusted, along with the change of the working condition of the bearing, the inclination of the tile surface and the thickness of an oil film can be changed, and more heat generated by friction can be taken away, so that the temperature between the bearing tile and the thrust disc is reduced, the carbon deposition phenomenon of the bearing tile is reduced, and the bearing tile is also superior to other thrust bearings.

Compared with the prior art, the utility model discloses utensil beneficial effect: through the improvement of structure, the oil film volume of front and back bearing is improved, and improved version bearing is 12 times of old-fashioned bearing oil film volume, and the lubricated oil mass that can see through in the bearing unit per hour of improved version is obviously more than old-fashioned bearing is big, realizes the lubricated oil mass of long-term operation increase pressure oil film, and the heat that the increase oil mass can produce the bearing is taken away to avoid the carbon deposit phenomenon. And carbon deposition is relieved, and the long-term stable operation of the core equipment of the whole PTA device is realized. The cost is greatly saved, and the time and the labor are saved; the thrust bearing is more diversified; the bearing can be applied to all equipment using a thrust bearing, such as a pump, a compressor and the like in the industrial field, and the stable operation of a long period is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic perspective view of an old tilting pad thrust bearing pad.

FIG. 2 is a partial cross-sectional view of the overall structure of an old tilting pad thrust bearing.

Fig. 3 is a schematic perspective view of the tile of the present invention.

Fig. 4 is a partial sectional view of the overall structure of the present invention.

Fig. 5 is a schematic diagram showing the comparison between the oil film generated by the present invention and the oil film generated by the old tilting pad thrust bearing.

In the figure: 1. a base; 2. a tile; 21. supporting ribs; 22. a pin hole; 3. a high pressure fuel injector.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 3 and 4, the utility model provides a tilting pad thrust bearing of tail gas expander, include: the device comprises a base 1, a tile 2 assembled in the base, a mirror plate arranged above the tile and a high-pressure oil nozzle 3 arranged between adjacent tiles and used for spraying oil to the tile;

the support rib 21 of the pad is arranged to be offset in the direction of the end point of rotation of the pad with respect to the thrust plate.

Example 1

As shown in fig. 1 and 2, the basic structure of the old bearing is that a supporting rib with a symmetrical center is arranged on the back of a pad, the pad swings and inclines around the supporting rib under the action of oil pressure, so that a wedge-shaped gap is formed between a thrust disc and the thrust pad, and when a rotor rotates, oil is continuously brought into the wedge-shaped gap to form a dynamic pressure oil film with pressure resistance to bear the axial thrust of a tail gas expander and transmit the thrust to a bearing seat.

As shown in fig. 3 and 4, the present invention provides a tilting pad thrust bearing of a tail gas expander, wherein the extending direction of the support rib of the pad is the radial direction which takes the geometric center of the thrust bearing as the central point; the supporting ribs deviate from the middle position to the end point direction of the rotation of the tile relative to the thrust disc according to the golden section line; the integral structure of the bearing is unchanged, including the arrangement position of the pin hole 22 on the pad;

adopt above-mentioned technical scheme the utility model discloses, the bearing rib 21 at tile piece back symmetry center is skew a bit, and skew direction is tile piece 2 for the rotatory final position of thrust disc, and the bearing during operation forms between tile face and axle journal surface with the help of the fluid dynamic pressure effect of lubricating oil film and bears the weight of the oil wedge, and it makes two surfaces break away from the contact completely. The oil film thickness at the oil wedge inlet and outlet is the main parameter affecting the bearing capacity of the tile 2. After the position of the supporting rib 21 is adjusted, along with the change of the working condition of the bearing, the inclination of the tile surface and the thickness of an oil film can be changed, and more heat generated by friction can be taken away, so that the temperature between the bearing tile 2 and a thrust disc is reduced, the carbon deposition phenomenon of the bearing tile is reduced, and the bearing tile is also superior to other thrust bearings.

As shown in fig. 5 (A stands for old-fashioned tilting pad thrust bearing, B stands for the utility model discloses a bearing structure), through the improvement of structure, the oil film volume of bearing before and after the improvement, the bearing of improved edition is 12 times old-fashioned bearing oil film volume, can see out the lubricated oil mass that passes through in the bearing unit per hour of improved edition obviously than old-fashioned bearing will be big many, realize the lubricated oil mass of long-term operation increase pressure oil film, the heat that the increase oil mass can produce the bearing is taken away to avoid the carbon deposit phenomenon.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (3)

1. A tail gas expander tilting pad thrust bearing comprising: the fuel injection device comprises a base, pads assembled inside the base, a mirror plate arranged above the pads and a high-pressure fuel injection nozzle arranged between adjacent pads and used for injecting fuel to the pads;

the method is characterized in that:

the position of the supporting rib of the pad is arranged in a manner of offsetting towards the rotating terminal direction of the pad relative to the thrust disc.

2. The exhaust gas expander tiltable pad thrust bearing of claim 1, wherein:

the extending direction of the supporting ribs of the pad is the radial direction which takes the geometric center of the thrust bearing as the central point.

3. The exhaust gas expander tilting pad thrust bearing of claim 2, wherein:

the supporting ribs deviate from the middle position to the end point direction of the rotation of the tile relative to the thrust disc according to the golden section line.

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