KR100759598B1 - Bearing with the tilting pad supported by flexible web - Google Patents

Abstract

A bearing with a tilting pad supported by a flexible web is provided to more safely rotate a rotary shaft by absorbing vibration or overload. A bearing with a tilting pad(2) supported by a flexible web(21) includes a bearing housing(1) and a foil(3). An axis hole formed by penetrating an inside of the bearing is formed on the bearing housing. The web is formed inside of the bearing housing as one body. More than one tilting pad is formed on the web as one body to be installed to be elastically supported by the web. One end of one side of the foil is fixed on the tilting pad on an inner surface of the tilting pad to elastically support the rotary shaft(110). The foil is formed to be coupled with a foil plate(31) and a bumper(32). The foil plate in a shape of a plate body has the same curvature as the tilting pad. The bumper is installed between the foil plate and the tilting pad to have the same curvature as the foil plate.

Description

Bearing with tilting pad supported by flexible web {BEARING WITH THE TILTING PAD SUPPORTED BY FLEXIBLE WEB}

1 is a perspective view showing an example of a journal bearing having a tilting pad supported on a flexible web according to the present invention;

2 is a cross-sectional view of the journal bearing shown in FIG.

3 is a cross-sectional view showing an example of a journal bearing having a tilting pad supported on a flexible web according to the present invention;

4 is a side view showing an example of a bump foil provided in a journal bearing having a tilting pad supported on a flexible web according to the present invention;

5 is a perspective view showing an example of a thrust bearing with a tilting pad supported on a flexible web according to the present invention;

6 is a perspective view showing another example of a thrust bearing with a tilting pad supported on a flexible web according to the present invention;

7 is a perspective view showing another example of a thrust bearing with a tilting pad supported on a flexible web according to the present invention;

8 is a cross-sectional view showing an example of a journal bearing having a conventional tilting pad,

9 illustrates an example of a thrust bearing having a conventional tilting pad.

  9A is a full sectional view,

  FIG. 9B is a sectional view taken along the line A-A of FIG. 9A; FIG.

<Description of the symbols for the main parts of the drawings>

1: bearing housing 1 ': thrust plate

   11, 11 ': Free space

2, 2 ': tilting pad

    21, 21 ': elastic web

    22, 22 ': slope

3, 3 ': foil

    31, 31 ': foil plate

        311, 311 ': Fixed hole

    32, 32 ': bumper

        321, 321 ': fixing hole

        322, 322 ': wrinkle

The present invention relates to a bearing, and in particular, the tilting pad supporting the shaft is elastically supported in the direction in which the force acts, thereby achieving a damping effect, and improving the adaptation to the misalignment, while also improving the rotation axis at high speed. The present invention relates to a bearing having a tilting pad supported by a flexible web capable of stably supporting and effectively improving the stability of the bearing by effectively reducing vibration and vibration.

Furthermore, it relates to a bearing with a tilting pad supported by a flexible web with improved load carrying capacity.

In general, the bearing is a means for supporting the axis of rotational movement and the axis of reciprocating movement to keep the movement smoothly. These types of bearings can be classified into sliding bearings and rolling bearings according to the contact types of the shafts and bearings, and are classified into journal bearings and thrust bearings according to the load direction of the shafts.

The sliding bearing is a sliding friction bearing in which a thin oil film or a pressure gas is interposed between the shaft and the bearing metal to perform relative sliding movements. Bearing.

Such a journal bearing has a shaft hole formed in the center thereof, and is pressed and mounted in the bearing housing. In the journal bearing mounted on the bearing housing, a shaft is inserted into and mounted in a shaft hole formed in a longitudinal direction, wherein a proper gap is maintained between an inner surface of the shaft hole and an outer surface of the shaft, and a through hole formed in the bearing housing is formed in the gap between the shaft hole and the shaft. The oil supplied through the hole is applied to the inner circumferential surface of the journal bearing to form an oil film, and the formation of the oil film supports rotation without directly contacting the shaft hole and the shaft. However, for the high efficiency and light weight of the industrial machinery, the rotational speed of the industrial machinery is gradually developing at a high speed. As a result, the existing journal bearings are required to secure stability at high speeds. Bearing has been developed and used.

The bearing having such a tilting pad supports the rotating shaft with a tilting pad which is rotatably installed to compensate for the eccentricity or inclination of the rotating shaft so as to more stably rotate the rotating shaft.

8 and 9 illustrate a journal bearing and a trust bearing with a conventional tilting pad, respectively. First, referring to the journal bearing, a plurality of tilting pads 230 are provided in the circumferential direction in the axial hole 220 formed through the inside of the bearing housing 210. The tilting pad 230 has the same curvature as that of the bearing housing 210 to form an inner circumferential surface of the bearing housing 210, and a plurality of oil supply holes extending to the tilting pad 230 are provided in the bearing housing 210. The oil is supplied to the contact surface of the tilting pad 230 with the rotating shaft, and the tilting pad 230 flows in the centrifugal direction so as to be spaced apart from each other by a predetermined distance so as to smoothly rotate the rotating shaft. It is installed.

In addition, the tilting pad 230 is installed such that the outer peripheral center portion of the tilting pad 230 is supported by the pivot 230a so that one end thereof does not touch the inner surface of the bearing housing 210 or swing beyond a predetermined range.

However, the above-described tilting bearing has a damping effect when the rotating shaft is eccentric to one side because the tilting pad 230 is pivoted about the pivot 230a as described above, but damping the movement of the shaft up and down due to the vibration of the rotating shaft. There was a problem that was less effective.

Next, as shown in FIG. 8, the thrust bearing is formed by installing a tilting pad 130 between the thrust runner 111 and the thrust plate 120 formed integrally with the rotation shaft 110. The tilting pad 130 is installed so that the center portion is pivoted by the pivot 131. In the case of the thrust bearing configured as described above, a damping effect occurs when the tilting pad 130 is rotated by the pivot 131 and the rotating shaft is inclined, but the damping effect of vibration in the axial direction of the rotating shaft has a low problem.

That is, the conventional bearings configured as described above have a problem in that the load bearing ability is poor.

The present invention is to solve the above problems, it can not only support the rotation axis more stably, but also improved damping performance and adaptation to the misalignment to support the rotation axis more stably while effectively reducing the vibration phenomenon or vibration occurrence It is an object of the present invention to provide a bearing having a tilting pad supported by a flexible web capable of improving the stability of the bearing.

In particular, it is an object to provide a bearing with an increased load carrying capacity.

The present invention for achieving the above object is a bearing housing formed with a shaft hole formed therein; At least one tilting pad formed integrally with the web integrally formed in the bearing housing and installed to be elastically supported by the web; One end portion is fixed to the tilting pad on an inner surface of each of the tilting pads, and further includes a foil for elastically supporting the rotating shaft.

In addition, the thrust bearing according to another aspect of the present invention includes a thrust plate formed with a shaft hole in the center and at least one rod insertion hole in the upper surface; One or more tilting pads elastically supported by a web integrally formed on an upper portion of the trust plate and rotatably supporting a trust runner installed on a rotating shaft; One end is fixedly installed on an upper surface of the trust plate, and the upper surface includes one or more foils on which a trust runner formed on a rotating shaft is mounted.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

As described above, the present invention is characterized by having a web 21 for elastically supporting the tilting pad, which is applicable to both journal bearings and thrust bearings.

Hereinafter, the present invention will be described in detail, but first, the journal bearing will be described.

1 to 4 show the journal bearing and its components of the present invention, Figure 1 is a perspective view showing an example of a journal bearing having a tilting pad supported on a flexible web according to the present invention, Figure 2 1 is a cross-sectional view of the journal bearing shown in FIG. 1, FIG. 3 is a cross-sectional view showing an example of a journal bearing having a tilting pad supported on the flexible web according to the present invention, and FIG. 4 is a tilting supported on the flexible web according to the present invention. It is a side view which shows an example of the bump foil with which the journal bearing provided with the pad was provided.

As shown in the present invention, the journal bearing has a tilting bed 2 inside the bearing housing 1.

As shown in FIG. 1, the bearing housing 1 has a web 21 formed in a middle portion of a circular ring, and a foil 3 is provided on an inner surface of the tilting pad 2.

The tilting pad 2 is integrally installed in the web 21 formed in the bearing housing 1, and the free space 11 is formed by digging deeper than other portions around the web 21 as shown. It is.

That is, the web 21 formed in the bearing according to the present invention is formed integrally with the tilting pad 2 and the bearing housing 1 as shown in the figure to elastically support the tilting pad 2.

The clearance 11 formed in the bearing housing 1 is formed so that the periphery of the web 21 is deeply formed so that the web 21 can be sufficiently rotated from side to side.

The tilting pad 2 is an arc-shaped plate that is bent at the same curvature as the internal curvature of the bearing housing 1 as shown, and can be rotated in the circumferential direction about the web 21. The tilting pad 2 may be provided in plural as shown in the drawing, and is provided to be spaced apart from each other by a predetermined distance so as not to hit each other when rotated.

The tilting pad 2 is formed to have the same thickness as shown in FIG. 3, or as shown in FIGS. 1 and 2, the inclined surface 22 is cut thinner than other portions by cutting out both ends facing outwards. Was formed to increase the range in which the tilting pad 2 can be rotated.

In addition, the bearing according to the present invention, as shown in Figs. 1 to 4, is provided with a foil (3) on the inner facing surface of each tilting pad (2) which is rotatably fixed to the inner peripheral surface of the bearing housing (1) have.

The foil 3 elastically supports the rotating shaft 110 to absorb the load applied to the rotating shaft 110 and to enable the smooth rotation of the rotating shaft 110. One end of the foil is tilted. It is fixed to the end of the pad (2) by fixing means such as rivets or screws, and the other end is freely prevented to support the rotating shaft 110 elastically around the fixing portion.

The foil 3 may be configured by combining the foil plate 31 and the bumper 32. The foil plate 31 is a plate body having the same curvature as the tilting pad 2 as shown in the drawing, and has a diameter smaller than the inner diameter of the tilting pad 2 so that a gap is formed between the tilting pad 2. One end, that is, the end fixed to the tilting pad 2 is bent toward the tilting pad 2 to form a fixing part, and one or more fixing holes 311 are formed in the fixing part.

As a method of fixing the foil plate 31 to the tilting pad 2, a fixing screw, a rivet, or a welding method may be used as described above, and one circular ring may be divided into quarters. It can be made into a shape made into two or divided, and can also be divided | segmented into more or less.

The bumper 32 may have a structure capable of simply supporting a part of the foil plate 31 as a means for enhancing the damping effect by reinforcing the elastic force of the foil plate 31, but as shown in FIG. By using the 322 formed along the circumferential surface, the foil plate 31 can be evenly supported.

One end of the bumper 32 is fixed to one end of the tilting pad 2 together with the fixing part of the foil plate 31 and the fixing means is as described above. The bumper 32 is installed at a position between the foil plate 31 and the tilting pad 2 as shown, and the unfixed end is left free to allow the foil plate 31 to be loaded by the rotating shaft 110. As a result, the wrinkles 322 are expanded and contracted to buffer the load that is erased on the foil plate 31.

The bumper 32 may also be configured by dividing a circular ring having a plurality of corrugations 322 into two or four or more or less or less, such as the foil plate 31, and the length of the foil plate 31. When the wrinkles 322 are increased by being pushed by the load by the rotating shaft 110, the freely left end should be made to a length such that it does not touch the other bumper 32.

The pleats 322 formed on the bumper 32 may be formed in the circumferential direction or may be formed in the longitudinal direction of the rotation shaft. In addition, the pleats 322 may have a plurality of rows, and the pleats 322 of different rows may be staggered with each other.

In addition, the bumper 32 constituting the foil 3 is configured to overlap the configuration as shown in Figure 4 can improve the rigidity control and damping function. That is, the bumper 32 is composed of the inner bumper 32a and the outer bumper 32b, and when the load is small, the rigidity is attenuated only by the inner bumper 32a. When the load is large, the bumper 32 is also applied to the outer bumper 32b. The load affects the double damping effect.

The following describes thrust bearings.

The thrust bearing is constructed as shown in Figs.

As shown and explained above, the thrust bearing also has a tilting pad 2 'having the same structure as the journal bearing on the top of the thrust plate 1'.

The thrust plate 1 'is a circular plate body as shown in Figs. 5 to 7 is formed in the center shaft hole through which the rotating shaft 110 is inserted, and at a position spaced a certain distance from the shaft hole formed in the center A plurality of webs 21 'are integrally formed, and a foil 3' is provided on the top of the trust plate 1 '.

The tilting pad 2 'is rotatably installed by the web 21' formed on the trust plate 1 ', and the web 21' is similar to the web 21 of the journal bearing described above. Description is omitted.

As described above, the bottom surface of the tilting pad 2 'installed to be elastically supported by the web 21' is formed with an inclined surface 22 'such that its thickness becomes gradually thinner from the center toward the edge, thereby forming the web 21'. The range that can be rotated around the center is widened, and many can be installed so as to be horizontal, and they are installed so as to be spaced apart from each other by a predetermined distance so that they do not collide with each other when rotated.

The foil 3 ′ elastically supports the trust runner 111 formed integrally with the rotation shaft 110 to absorb the load applied to the rotation shaft 110 and to enable smooth rotation of the rotation shaft 110. As a function, one end is fixed to the end of the tilting pad 2 'by fixing means such as rivets or screws, and the other end is freely prevented to elastically support the rotating shaft 110 around the fixing part. do.

The foil 3 may be configured by combining the foil plate 31 'and the bumper 32'. The foil plate 31 'is a plate having an outer diameter that is the same as or similar to the tilting pad 2', and is fixed to one end, that is, the tilting pad 2 ', so that a gap is formed between the tilting pad 2' and the tilting pad 2 '. The end portion is bent toward the tilting pad 2 'to form a fixing portion, and one or more fixing holes 311' are formed in the fixing portion.

The method of fixing the foil plate 31 ′ to the tilting pad 2 ′ is as described above, and one disc may be made into a quarter shape or a six quarter shape. It can also divide and comprise it below.

The bumper 32 ′ is a means for enhancing the damping effect by reinforcing the elastic force of the foil plate 31 ′ and may have a structure capable of simply supporting a part of the foil plate 31 ′ as illustrated. By using the wrinkles 322 'of which the foil plate 31' can be supported evenly.

One end of the bumper 32 'is fixed to one end of the tilting pad 2' together with the fixing portion of the foil plate 31 ', and the fixing means is as described above. The bumper 32 ′ is installed at a position between the foil plate 31 ′ and the tilting pad 2 ′ as shown, and the unfixed end is left free to allow the foil plate 31 ′ to rotate. When it is pushed by the load by), the wrinkles 322 'portion is stretched to buffer the load erased on the foil plate 31'.

The bumper 32 ′ may also be configured by dividing a circular plate having a plurality of corrugations 322 ′, such as a foil plate 31 ′ into two or four quarters or more or less, and the width of the foil plate 31 ′. When the 31 'is pushed by the load by the rotating shaft 110, and the wrinkles 322' are increased, the freely left end should be made to a length such that it does not touch the other bumper 32 '.

The pleats 322 ′ formed in the bumper 32 ′ may be formed concentrically or may be radially or directed from one end to the other end, may have a plurality of rows, and may have different rows of pleats 322 ′. ) May cross each other.

In addition, the bumper 32 ′ of the bearing according to the present invention has a double overlapping configuration as shown in FIG. 7 to improve rigidity control and damping function. That is, the bumper 32 'is composed of the upper bumper 32a' and the lower pump 32b ', and when the load is small as shown, the rigidity is attenuated only by the upper bumper 32a' and the load is large. In this case, the load also affects the lower bumper 32b 'so that a double damping effect occurs.

Hereinafter, the operation of the bearing configured as described above is outlined.

First, the operation of the journal bearing will be described.

When the rotating shaft 110 is eccentrically or vibrates to one side by an external force, the web 21 is elastically operated to support the tilting pad 2 in a direction supporting the rotating shaft while being inclined in the direction in which the external force is applied. Rotating shaft 110 to maintain a stable state.

In addition, when the foil 3 is installed inside the tilting pad 2, when the rotary shaft 110 is eccentric to one side, the end of the foil plate 31 in the eccentric direction is in contact with the rotary shaft 110 and at the same time the foil plate 31 is provided. ) And the bumper 32 installed between the tilting pad 2 contracts to absorb the load, and at the same time, the tilting pad 2 is rotated about the web 21 to meet the rotating shaft 110. ), The opposite side is pulled to the center.

By doing so, the load of the rotary shaft 110 is absorbed and the rotary shaft 110 can achieve stable rotation.

In addition, when the eccentricity of the rotating shaft 110 or vibration of the rotating shaft occurs in this process, the vibrating rotating shaft strikes the foil plate 31 and is supported by the elasticity of the web 21 supporting the tilting pad 2. The vibration of the rotating shaft is absorbed to enable stable rotation of the rotating shaft.

Next, the operation of the trust bearing will be explained.

When the rotation shaft 110 is inclined to one side by an external force, the trust runner 111 integrally formed with the rotation shaft 110 is inclined, and is installed at a corresponding part of the tilting pads 2 'installed below the trust runner 111. Force is applied to the tilting pad 2 '.

When the load is applied to the tilting pad 2 ', the web 21' supporting the tilting pad 2 'is inclined to one side and absorbs the load so that the trust runner 111 is in a stable state, even when vibration is generated. The rotation shaft 110 finds stability by absorbing the generated vibrations of the web 21 ′.

In addition, when the foil 3 'is provided on the upper part of the tilting pad 2', a force is applied to the foil plate 31 'installed at a corresponding portion of the foil plates 31' installed below the trust runner 111. All. At this time, the bumper 32 'installed between the foil plate 31' and the tilting pad 2 'contracts to absorb the load, and the tilting pad 2' rotates around the web 21 'while the web ( 21 '), the load is absorbed.

By doing so, the load of the rotary shaft 110 is absorbed and the rotary shaft 110 can achieve stable rotation.

While the invention has been described with reference to the preferred embodiments, many modifications and variations are possible without departing from the scope and spirit of the invention as set forth by the claims below.

As described in detail above, the present invention has an effect that the tilting pad is elastically supported by the web to absorb the vibration or the overload, so that the rotating shaft can be rotated more stably.

In addition, by installing the tilting pad and the foil overlapping, the damping effect can be increased, and the load supporting ability and the adaptation to misalignment can be improved, and the effect of effectively reducing the vibration and vibration while supporting the rotating shaft more stably is provided. have.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Accordingly, the invention can only be construed limited by the words of the appended claims.

Claims (12)

A bearing housing 1 having a shaft hole formed therein; At least one tilting pad (2) integrally formed in the web (21) integrally formed in the bearing housing (1) and installed to be elastically supported by the web (21); One end portion is fixedly installed on the tilting pad 2 on the inner surface of each of the tilting pads 2, and further includes a foil 3 elastically supporting the rotating shaft 110. The foil 3 is installed between the foil plate 31 having a plate shape having the same curvature as the tilting pad 2, the foil plate 31 and the tilting pad 2, and the foil plate 31. Combining the bumper 32 having the same curvature, The bumper 32 has a plurality of corrugations 322, the bumper 32 is provided with a tilting pad supported by a flexible web characterized in that the formed corrugation is formed in the circumferential direction or in the longitudinal direction of the rotation axis. One tilting foil journal bearing. The method of claim 1, Tilting foil journal bearing with a tilting pad supported by a flexible web, characterized in that the outer side of both ends of the tilting pad (2) is formed to be thinner than the suspension. delete delete The method according to claim 1 or 2, Tilting foil journal with a tilting pad supported by a flexible web, characterized in that the plurality of corrugations 322 formed in the bumper 32 has a plurality of rows, the corrugations 322 of different rows are staggered from each other bearing. The method of claim 5, The bumper 32 is a tilting foil journal bearing supported by a flexible web, characterized in that it has a dual structure of the inner pump (32a) and the outer pump (32b). A thrust plate 1 'having a shaft hole formed at the center thereof and at least one rod insertion hole 11' formed at an upper surface thereof; One or more tilting pads 2 'installed to be elastically supported by a web 21' integrally formed on the top of the trust plate 1 'to rotatably support the runner 111 installed on the rotation shaft 110. ) And; One end is fixedly installed on the upper surface of the trust plate 1 ', and the upper surface includes one or more foils 3' on which a trust runner 111 'formed on the rotating shaft 110 is mounted. Tilting foil thrust bearing supported by a flexible web, characterized in that the inclined surface (22 ') is further formed on the outside of both ends of the tilting pad (2') than the middle. delete The method of claim 7, wherein The foil 3 'is composed of a flat plate-shaped foil plate 31' and a bumper 32 'provided between the foil plate 31' and the tilting pad 2 '. Tilting foil thrust bearing with a tilting pad supported by. The method of claim 9, The bumper 32 ′ has a plurality of pleats 322 ′, and the pleats formed on the bumper 32 ′ are tilting pads supported by the flexible web, characterized in that they are formed concentrically or radially. Tilting foil thrust bearings. The method according to claim 9 or 10, The plurality of corrugations 322 'formed on the bumper 32' have a plurality of rows, and the corrugations 322 'of different rows are staggered from each other, with a tilting pad supported by a flexible web. Tilting foil thrust bearings. The method of claim 11, Tilting foil thrust bearing with a tilting pad supported by a flexible web, characterized in that the bumper (32 ') has a dual structure of the inner pump (32a') and the outer pump (32b ').

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