KR100803378B1 - Tilting foil bearing with the groove - Google Patents

Abstract

According to the present invention, the groove is formed on the foil to improve the load supporting ability, and the tilting pad is elastically supported in the direction of the force to increase the damping effect, while improving the adaptability to misalignment at high speed rotation. The present invention relates to a bearing provided with a foil having grooves that can effectively reduce a vibration phenomenon and vibration, while supporting the rotation shaft more stably.

Such a journal bearing according to the present invention includes a bearing housing having a shaft hole formed therein; One end portion is fixedly installed on an inner surface of the housing, and includes one or more foils having a rotating shaft inserted therein, and a plurality of grooves are formed on an inner surface of the foil.

In addition, the thrust bearing according to another aspect of the present invention includes a thrust plate of a circular plate-shaped thrust formed in the center; One end is fixedly installed on the upper surface of the trust plate, and the upper surface includes one or more foils 2 'on which a trust runner formed on a rotating shaft is mounted, and a plurality of grooves are formed on the upper surface of the foil. It is done.

Tilting pad, foil, groove, bearing

Description

Tilting foil bearing with grooved foil {TILTING FOIL BEARING WITH THE GROOVE}

1 is a perspective view illustrating an example of a foil journal bearing having a grooved foil according to the present invention;

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

3 is a perspective view showing another example of a tilting foil journal bearing having a grooved foil according to the present invention;

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

5 is a perspective view showing another example of a tilting foil journal bearing having a grooved foil according to the present invention;

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

7 is a perspective view showing an example of a groove bearing foil having a groove according to the present invention;

8 is a perspective view showing another example of the groove-formed journal bearing foil according to the present invention;

Figure 9 is a side view showing another example of a groove-formed journal bearing foil according to the invention,

10 is a bottom perspective view of the tilting pad installed in the journal bearing according to the present invention;

11 is a perspective view illustrating one example of a foil trust bearing having a grooved foil according to the present invention;

12 is a perspective view showing another example of a tilting foil thrust bearing with a grooved foil according to the present invention;

13 is a perspective view showing another example of a tilting foil thrust bearing having a grooved foil according to the present invention;

14 is a perspective view showing an example of a groove for forming a thrust bearing foil according to the present invention;

15 is a perspective view showing another example of a groove for forming a thrust bearing foil according to the present invention;

16 is a bottom perspective view of a tilting pad installed in a thrust bearing according to the present invention;

17 is a cross-sectional view showing an example of a journal bearing having a conventional foil;

18 is a perspective view showing an example of a thrust bearing having a conventional foil.

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

1: bearing housing 1 ': thrust plate

   11, 11a: Pivot Groove

   11 ', 11a': road hole

2, 2 ': foil

    21, 21 ': foil plate

        211, 211 ': Groove 212, 212': Fixture

    22, 22 ': bumper

        221, 221 ': Fixed hole

        222, 222 ': wrinkles

3, 3 ': tilting pad

    31, 31 ', 32, 32': pivot

         321, 321 ': Rod 322, 322': Hinge plate 323, 323 ': Elastic body

    33, 33 ': slope

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 to obtain a damping effect, while also improving the load bearing capacity and adaptability to misalignment, while rotating at high speed. The present invention relates to a bearing having a grooved foil which can improve the stability of the bearing by effectively reducing the vibration phenomenon and the occurrence of vibration while supporting the rotating shaft more stably.

Furthermore, the invention relates to a bearing having a grooved foil with adjustable stiffness.

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 a high speed. ) 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.

17 and 18 show journal bearings and trust bearings having conventional foils, respectively. First, referring to the journal bearing, a sleeve 120 having a hollow portion 120a therein and a hollow portion between the sleeve 120 and the rotating shaft 110 so that the rotating shaft 110 is accommodated and rotated. There are a plurality of airfoils 130 arranged within 120a.

The air foils 130 are each formed in an arc shape and have an elastic force, and are arranged along the circumferential direction of the sleeve 120. That is, one end of the air foil 130 is fixed to the inner surface of the sleeve 120, the other end is installed in a state overlapping or spaced apart from the adjacent air foil (130). At this time, the fixing between the sleeve 120 and the air foil 130 is fixed to one end of the air foil 130 is inserted into the slot formed on the inner surface of the sleeve 120.

In the foil bearing configured as described above, when the rotating shaft 110 slowly rotates in the hollow portion of the sleeve 120, a high-pressure air layer is formed between the rotating shaft 110 and the air foil 130. As a result of the floating shaft 110, the rotating shaft 110 rotates while maintaining a constant distance from the air foil 130. In this case, the air foil 130 serves as a bumper for supporting the rotating shaft 110. Do it.

However, the conventional foil bearing configured as described above has a problem in that it is difficult to obtain stability at high speed while excellent in rigidity control and damping function.

The illustrated thrust bearing has a foil, and includes a foil 230 between the thrust runner 111 and the thrust plate 220 integrally formed on the rotating shaft 110, and the foil 230 has a fixed end portion at one side. 231 is fixed to the trust plate 220. The thrust bearing configured as described above allows one end of the foil 230 to elastically support the trust runner 111 to dampen a load applied to the rotation shaft 110 and to smoothly rotate the load.

However, the conventional thrust bearings configured as described above also have excellent rigidity control and damping functions, but have difficulty in obtaining stability at high speed.

The present invention is to solve the above problems, not only can support the rotating shaft more stably, but also the damping performance, load bearing capacity and the ability to adapt to the misalignment is improved to support the rotating shaft more stably while shaking or vibration It is an object of the present invention to provide a tilting foil bearing having a grooved foil which can effectively reduce the back and thus improve the stability of the bearing.

In particular, it is an object of the present invention to provide a bearing having improved load bearing capability by allowing friction to be reduced by grooves.

The present invention for achieving the above object is a bearing housing having a shaft hole formed therein; One end portion is fixedly installed on an inner surface of the housing, and includes one or more foils having a rotating shaft inserted therein, and a plurality of grooves are formed on an inner surface of the foil.

In addition, according to another aspect of the present invention the present invention is a thrust plate of a circular plate-shaped shaft hole is formed in the center; One end is fixedly installed on the upper surface of the trust plate, and the upper surface includes one or more foils 2 'on which a trust runner formed on a rotating shaft is mounted, and a plurality of grooves are formed on the upper surface of the foil. It is done.

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 in that the groove is formed on the foil, and this feature can be applied to both the journal bearing and the thrust bearing.

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

1 to 10 show a journal bearing having a tilting pad according to the present invention and its components, Figure 1 is a perspective view showing an example of a foil journal bearing having a grooved foil according to the present invention, 2 is a cross-sectional view of the journal bearing shown in FIG. 1, FIG. 3 is a perspective view showing an example of a tilting foil journal bearing having a grooved foil according to the present invention, and FIG. 4 is a view of the journal bearing shown in FIG. 5 is a perspective view illustrating another example of a tilting foil journal bearing having a grooved foil according to the present invention, and FIG. 6 is a cross-sectional view of the journal bearing shown in FIG. 5.

As shown in the present invention, the journal bearing is provided with a foil 2 inside the bearing housing 1, and an inner surface of the foil 2 is provided with a groove 211 having a groove shape. .

The groove 211 is a means for reducing the friction between the rotating shaft 110 and the foil 2 may be injected into the groove 211, such as oil.

The foil 2 elastically supports the rotating shaft 110 to absorb the load applied to the rotating shaft 110 and also serves to enable the smooth rotation of the rotating shaft 110, and one end of the housing It is fixed to one side of (1) 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 2 may be configured by combining the foil plate 21 and the bumper 22. The foil plate 21 is a plate having the same curvature as the inner surface of the housing 1 as shown in the diameter of the housing plate 1 so that a gap is formed between the inner surface and the inner surface of the housing 1. One small end, that is, the end fixed to the housing 1 is bent toward the housing 1 to form a fixing part, and one or more fixing holes 311 are formed in the fixing part.

As the method of fixing the foil plate 21 to the housing 1, a fixing screw, a rivet, or the like 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 22 may have a structure capable of simply supporting a part of the foil plate 21 as a means for enhancing the damping effect by reinforcing the elastic force of the foil plate 21, but as shown in FIG. 222 is formed along the circumferential surface to allow the foil plate 21 to be evenly supported.

One end of the bumper 22 is fixed to one side of the housing 1 together with the fixing part of the foil plate 21 and the fixing means is as described above. The bumper 22 is installed at a position between the foil plate 21 and the housing 1 as shown in the drawing, and an unfixed end is left free to allow the foil plate 21 to be loaded by the load of the rotating shaft 110. When pushed back, the wrinkles 222 are stretched to buffer the loads that are erased on the foil plate 21.

The bumper 22 may also be configured by dividing a circular ring having a plurality of corrugations 222, such as a foil plate 21, into two, four, or more, or less, lengths of the foil plate 21. When the pleats 222 are stretched 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 22. 7 to 9 illustrate one example.

The pleats 222 formed on the bumper 22 may be formed in the circumferential direction or in the longitudinal direction of the rotating shaft. In addition, the pleats 222 may have a plurality of rows, and the pleats 222 of different rows may be staggered with each other. In addition, as shown in FIG. 7, the bumper 22 may be doubled to improve rigidity control and attenuation functions. That is, when the load is small, the rigidity is attenuated by only the internal bumper 22a, and when the load is large, the load also affects the external bumper 22b, thereby causing a double damping effect.

The journal bearing configured as described above may further include a tilting pad 3.

In the case where the tilting pad 3 is further installed, the bearing housing 1 is formed in a circular ring in a ring shape along the inner circumferential surface of the middle portion of the groove as shown in FIG. The pivot groove 11 was formed to allow the pivot 31 formed on the outer circumferential surface of the tilting pad 3 to be rotatable.

The tilting pad 3 is an arc-shaped plate that is bent at the same curvature as the inner curvature of the bearing housing 1, and a pivot 31 is formed on an outer circumferential surface of the tilting pad facing the bearing housing 1. It is coupled to the pivot groove 11 and rotated in the circumferential direction.

The tilting pad 3 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. In addition, the tilting pad 3 cuts both ends toward the outside to form an inclined surface 33 thinner than other portions to increase the range in which the tilting pad 3 can be rotated.

In addition, since the pivot 31 of the tilting pad 3 has an outer diameter smaller than the inner diameter of the pivot groove 11, the pivot 31 may flow in the pivot groove 11 to obtain a pumping effect. .

In addition, as shown in FIGS. 5 and 6, a plurality of rod grooves 11 may be formed in the housing 1, and the pivot pad 3 may be configured by installing a pivot 32 configured as follows. .

As shown in an enlarged view in FIG. 10, the pivot 32 has a rod 321 inserted into a rod groove 11a integrally formed at the center of the tilting pad 3, and a bottom surface of the tilting pad 3. And a hinge plate 322 hinged to the rod 321 and an elastic body 323 installed between the housing 1 and the tilting pad 3 to elastically support the tilting pad 3. .

The rod groove 11a formed in the bearing housing 1 is formed to be deeper than the length of the rod as shown in order to allow the rod 321 to be moved up and down sufficiently, and the rod 321 and the hinge plate 322. Is rotatably connected by a hinge pin. In addition, an elastic body 323 is installed between the tilting pad 3 and the bearing housing 1 so that the coil spring is wrapped around the rod 321 as shown as a means for elastically supporting the tilting pad 3. Can be installed and configured.

Although the elastic body 323 is illustrated as a coil spring in the drawing, as one embodiment, it may be provided with a synthetic resin or rubber having excellent elasticity having the same curvature as the inner surface of the housing 1.

The following describes thrust bearings.

11 to 15 illustrate a thrust bearing and its constituent elements, FIG. 11 is a perspective view showing an example of a foil thrust bearing with a grooved foil according to the present invention, and FIG. 12 is a groove according to the present invention. Is a perspective view showing another example of a tilting foil trust bearing having a foil formed with a foil, FIG. 13 is a perspective view showing another example of a tilting foil trust bearing having a grooved foil according to the present invention, and FIG. Fig. 15 is a perspective view showing an example of the groove for forming a thrust bearing foil, according to the present invention, Fig. 15 is a perspective view showing another example of the groove for forming a thrust bearing foil, Fig. 16 is a trust according to the present invention Bottom perspective view of a tilting pad mounted on a bearing.

As shown and explained above, the thrust bearing is also provided with the foil 2 'in which the groove 211' which has a structure similar to a journal bearing is formed in the upper part of the thrust plate 1 '.

As shown in FIG. 11, the thrust plate 1 'is a circular plate body, and a shaft hole through which a rotating shaft 110 is inserted is formed in the center thereof, and a foil 2' is fixed to the upper portion thereof.

The foil 2 ′ 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 thrust plate 1 'by fixing means such as rivets or screws, and the other end is freely left to support the rotating shaft 110 elastically around the fixing part. do.

The foil 2 may be configured by combining the foil plate 21 'and the bumper 22'.

The foil plate 21 'is a plate having an outer diameter that is the same as or similar to that of the thrust plate 1' and is fixed to one end, that is, the thrust plate 1 'such that a gap is formed between the thrust plate 1'. The end is bent toward the trust plate 1 'to form a fixing part, and one or more fixing holes 211' are formed in the fixing part.

The method for fixing the foil plate 21 'to the trust plate 1' is as described above, and one original plate may be made into a quarter shape or may be formed into a second shape, or more It can also divide and comprise it below.

The groove 211 'of the groove shape is formed on the foil plate 21' configured as described above.

The bumper 22 'is provided in the lower part of the foil board 21' comprised as mentioned above.

The bumper 22 ′ is a means for enhancing the damping effect by reinforcing the elastic force of the foil plate 21 ′ and may have a structure capable of simply supporting a part of the foil plate 21 ′ as illustrated. By using the wrinkles 222 'of which the foil plate 21' can be supported evenly.

One end of the bumper 22 'is fixed to one end of the tilting pad 2' together with the fixing part of the foil plate 21 ', and the fixing means is as described above. The bumper 22 'is installed at a position between the foil plate 21' and the tilting pad 3 ', as shown, and the unfixed end is left free to allow the foil plate 21' to rotate. When pushed by the load, the wrinkles 222 'portion is stretched to buffer the load erased on the foil plate 21'.

The bumper 22 'may also be formed by dividing a circular plate having a plurality of corrugations 222', such as a foil plate 21 ', into two or four quarters or more or less, and the width of the foil plate. If 21 'is pushed by the load by the rotating shaft 110, and the wrinkles 222' are extended, it should be made to such a length that the freely left end does not touch the other bumper 22 '.

The pleats 222 ′ formed in the bumper 22 ′ 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 222 ′. ) May cross each other.

In addition, the bumper 22 ′ may improve the stiffness control and attenuation functions by forming a double stack as shown in FIG. 15.

A tilting pad 3 'may be further installed between the lower portion of the foil 2' configured as described above, that is, between the foil 2 'and the trust plate 1'.

In order to install the tilting pad 3 'as described above, a pivot or a pivot groove is formed in the trust plate 1', and a tilting pad 3 'having a corresponding pivot groove or pivot is formed on the bottom thereof. Install and configure.

The tilting pad 3 'is formed with an inclined surface 33' such that the bottom surface of the thrust plate 1 'is gradually thinner while the bottom surface of the thrust plate 1' faces the edge from the central pivot portion, so that the tilting pad 3 'can rotate about the pivot portion. The range was widened. The tilting pad 3 '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 that they do not collide with each other when rotated.

In addition, the tilting pad 3 'may be supported by a pivot 32' having a structure capable of lifting up and down as shown in FIGS. 13 and 16. The structure of the pivot 32 'which can be lifted and lowered is configured as described in the journal bearing, and a detailed description thereof will be omitted.

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

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

The groove 211 formed on the foil plate 21 constituting the foil 2 lubricates the contact surface with the rotation shaft 110 to smoothly rotate the rotation shaft 110. In addition, when a load in the vertical direction is applied to the rotating shaft 110 during the rotation, the elastic body 213 is contracted to repeatedly tilt and tilt the tilting pad 3 to absorb the vibration of the rotating shaft.

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 3 in a direction supporting the rotating shaft while being inclined in the direction in which the external force is applied. The rotating shaft 110 is maintained in a stable state.

In addition, when the ascending pivot 32 is installed, when the load in the vertical direction is applied to the rotating shaft 110, the elastic body 323 is contracted, and the tilting pad 3 is struck down and restored to repeat the vibration of the rotating shaft. At this time, the bumper 22 provided between the foil plate 21 and the tilting pad 3 contracts to absorb the load, and the tilting pad 3 is rotated about the pivot 21.

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

In this process, when the rotating shaft 110 is tilted or when the rotating shaft vibrates, the vibrating rotating shaft strikes the foil plate 21 and the tilting pad 3 rotates to rotate the foil plate 21 in the direction in which the rotating shaft is inclined. ), The bumper 22 and the tilting pad 3 rotate so that they can be prevented from being damaged by the rotating shaft which vibrates.

When the rotating shaft 110 is eccentric to one side by an external force, the rotating shaft 110 is opposed to the end of the foil plate 21 in the eccentric direction to apply a force to the end of the foil plate 21, wherein the foil plate 21 And the bumper 22 installed between the and the tilting pad 3 contracts to absorb the load, and at the same time, the tilting pad 3 rotates around the hinge pin at the end of the pivot 21 to meet the rotating shaft 110. Is pushed toward the housing 1 side, and the opposite side is pulled toward 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 hits the foil plate 21 and the tilting pad 3 rotates at the same time to the foil plate 21 in the direction of the rotating shaft. ), The bumper 22 and the tilting pad 3 rotate so that they can be prevented from being damaged by the rotating shaft which vibrates.

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

In the case of a thrust bearing, the groove 211 'serves to reinforce lubrication similarly to the journal.

When a force in the vertical direction is applied to the rotation shaft 110, the elastic body 323 ′ contracts to repeatedly tilt and restore the tilting pad 3 ′ to absorb vibration of the rotation shaft.

When the rotary shaft 110 is inclined to one side by an external force, the trust runner 111 integrally formed with the rotary shaft 110 is inclined, and is installed at a corresponding portion of the foil plates 21 ′ installed under the trust runner 111. Force is applied to the foil plate 21 '.

At this time, the bumper 22 'installed between the foil plate 21' and the tilting pad 3 'contracts to absorb the load and the tilting pad 3' is rotated about the hinge pin of the pivot 21 '. do.

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

In this process, when the rotating shaft 110 is inclined or when the rotating shaft vibrates, the vibrating rotating shaft hits the foil plate 21 'and the tilting pad 2' is rotated to rotate the foil plate in the inclined direction. By rotating the 21 ', the bumper 22' and the tilting pad 3 ', they can be prevented from being damaged by the oscillating axis of 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 can increase the damping effect by overlapping the tilting pad and the foil, the load bearing capacity and the ability to adapt to misalignment is improved to support the rotating shaft more stably while generating a vibration phenomenon or vibration There is an effect that can effectively reduce the back.

In addition, the elastic body such as the rubber or the spring has an effect of increasing the damping effect to improve the rigidity adjusting ability.

While 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 (18)

A bearing housing 1 having a shaft hole formed therein; One end is fixedly installed on the inner surface of the housing (1) and the rotation shaft 110 is inserted into the inner one is configured to include one or more foils, A plurality of grooves 211 having a groove shape are formed on an inner surface of the foil 2, One or more tilting pads 3 are further rotatably provided by pivots 31 and 32 between the foil 2 and the inner surface of the housing 1, Tilting foil journal bearing with a grooved foil, characterized in that each foil (2) is fixed to each of the tilting pad (3). delete The method of claim 1, Tilting foil journal bearing with grooved foil, characterized in that the outer side of both ends of the tilting pad (3) is formed thinner than the middle of the inclined surface (33). The method of claim 3, wherein The pivot 31 formed in each of the tilting pads 3 has a grooved foil, characterized in that it is configured in the shape of a shaft having an arced end opposite to the pivot groove 11 dug in an arc shape on the inner surface of the housing 1. Tilting foil journal bearing with. The method of claim 3, wherein Pivot 32 formed in each of the tilting pad (3) is installed in the pivot hole (11 ') is formed in a cylindrical shape in the housing (1), the rod 211 is inserted into the rod hole (11a), A hinge plate 212 formed on a bottom surface of the tilting pad 2 and hinged to the rod 211, and installed between the bearing housing 1 and the tilting pad 2 to elastically tilt the tilting pad 2. Tilting foil journal bearing having a grooved foil, characterized in that consisting of an elastic body 213 to support. The method according to any one of claims 1 and 3 to 5, The foil 2 is installed between the foil plate 21 having a plate shape having the same curvature as the tilting pad 3, the foil plate 21 and the tilting pad 3, and the foil plate 21. Tilting foil journal bearing with a grooved foil characterized in that it is configured by combining a bumper 22 having the same curvature. The method of claim 6, The bumper 22 has a plurality of pleats 222, the fold formed in the bumper 22 is a tilting foil journal having a grooved foil characterized in that formed in the circumferential direction or in the longitudinal direction of the axis of rotation bearing. The method of claim 7, wherein Tilting foil journal bearing having a grooved foil characterized in that the plurality of pleats 222 formed in the bumper 22 has a plurality of rows, the pleats 222 of different rows are alternately formed. The method of claim 8, Tilting foil journal bearing having a grooved foil characterized in that the bumper 22 has a dual structure of the inner pump (22a) and the outer pump (22b). A thrust plate 1 'having a circular plate body shape having a shaft hole in the center thereof; One end is fixedly installed on an upper surface of the trust plate 1 ', and an upper surface includes one or more foils 2' on which a trust runner 11a formed on the rotating shaft 110 is mounted. A plurality of grooves 211 ′ having grooves are formed on an upper surface of the foil 2 ′. One or more tilting pads 3 'are further provided between the foils 2' and the thrust plate 1 'to be pivotable by pivots 31 and 32', Tilting foil thrust bearing with a grooved foil, characterized in that each foil (2 ') is fixed to each of the tilting pad (3'). delete The method of claim 10, Tilting foil thrust bearing with grooved foil, characterized in that the inclined surface 33 'is further formed on the outside of both ends of the tilting pad 3'. The method of claim 12, The pivot 31 'formed in each of the tilting pads 3' is configured in the shape of an axis having an arced end opposite to the pivot groove 11 ', which is formed in an arc shape on the upper surface of the trust plate 1'. Tilting foil thrust bearing provided with the grooved foil formed into it. The method of claim 12, The pivot 32 'formed in each of the tilting pads 3' is installed in a pivot hole 11a 'which is formed in a cylindrical shape on an upper surface of the trust plate 1', and in the pivot hole 11a '. A rod 321 'to be inserted, a hinge plate 322' formed at a bottom of the tilting pad 3 'and hinged to the rod 321', and the trust plate 1 'and a tilting pad 3 Tilting foil thrust bearing with a grooved foil, characterized in that composed of an elastic body (323 ') is installed between the') to elastically support the tilting pad (3 '). The method according to any one of claims 10 and 12 to 14, The foil 2 'is formed with a flat plate-shaped foil plate 21' and a groove formed by a bumper 22 'installed between the foil plate 21' and the tilting pad 3 '. Tilting foil thrust bearing with foil. The method of claim 15, The bumper 22 'has a plurality of corrugations 222' and the bumper 22 'is a tilting foil with grooved foils, characterized in that the formed corrugations are formed concentrically or radially. Trust bearings. The method of claim 16, Tilting foil thrust bearings with grooved foils, characterized in that the plurality of corrugations 222 'formed on the bumper 22' have a plurality of rows, and the corrugations 222 'of different rows are staggered from each other. . The method of claim 17, Tilting foil thrust bearing with grooved foil characterized in that the bumper (22 ') has a dual structure of the inner pump (22a) and the outer pump (22b).

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