JP5922808B1 - Bearing device and method for installing bearing device - Google Patents

Abstract

The present invention provides a bearing device and a bearing device installation method capable of reliably preventing a rotor shaft from jumping up in an emergency. A bearing device includes a bearing portion, a carrier ring provided on an outer peripheral side of the bearing portion and configured to hold the bearing portion, a bearing housing provided on an outer peripheral side of the carrier ring, At least one upper key attached to the upper half region of the carrier ring to be positioned between the upper half region of the carrier ring and the bearing housing; and the upper half region of the carrier ring or the bearing housing And at least one upper shim attached to the upper half region of the carrier ring so as to be positioned between any one of the upper key and the upper key. [Selection] Figure 2

Description

  The present disclosure relates to a bearing device for rotatably supporting a rotor shaft and a method for installing the bearing device.

  In general, a rotary machine such as a steam turbine or a gas turbine includes a bearing device for rotatably supporting a rotor shaft. As this bearing device, a configuration including a carrier ring for supporting a bearing portion is known. The carrier ring is usually attached to the bearing housing. In addition to the function of supporting the bearing portion, some carrier rings have a function of positioning the bearing portion in order to hold the rotor shaft at an appropriate position.

  For example, Patent Document 1 describes a bearing device used as a journal bearing. In this bearing device, a second key and a shim are arranged between a lower bearing cylinder (lower carrier ring) that supports the rotor shaft and the bearing housing, and the radial positioning of the lower bearing cylinder is performed by the shim. Is supposed to do. A third key is arranged between the upper bearing and the bearing housing to compensate for the lateral adjustment of the rotor shaft.

Japanese Unexamined Patent Publication No. 63-133852

  By the way, in the bearing device as described above, when the rotor shaft rotates, the rotor shaft may unintentionally jump upward and damage the parts of the rotating machine. For example, when the rotor shaft springs up in the turbine, the blades of the turbine may come into contact with the casing and the blades may be damaged.

  In this regard, in Patent Document 1, when the rotor shaft springs up, the rotor shaft comes into contact with the upper bearing to prevent upward displacement. However, since the lower bearing cylinder is positioned in consideration of the alignment of the rotor shaft, the distance between the upper bearing and the bearing housing, which is determined according to the position of the lower bearing cylinder, may increase. is there. In this case, when the upper bearing receives an upward load from the rotor shaft, there is room for the upper bearing to move upward, so that it is difficult to reliably press the rotor shaft by the upper bearing in an emergency.

  In view of the above-described circumstances, at least one embodiment of the present invention aims to provide a bearing device and a bearing device installation method that can reliably prevent the rotor shaft from jumping up in an emergency.

(1) A bearing device according to at least one embodiment of the present invention includes:
A bearing portion;
A carrier ring provided on the outer peripheral side of the bearing portion and configured to hold the bearing portion;
A bearing housing provided on the outer peripheral side of the carrier ring;
At least one upper key attached to the upper half region of the carrier ring so as to be located between the upper half region of the carrier ring and the bearing housing;
At least one upper shim attached to the upper half region of the carrier ring so as to be located between either the upper half region of the carrier ring or the bearing housing and the upper key;
It is characterized by providing.

  The bearing device of (1) includes at least one upper shim attached to the upper half region of the carrier ring so as to be positioned between either the upper half region of the carrier ring or the bearing housing and the upper key. ing. For this reason, the gap between the upper half region of the carrier ring and the bearing housing can be filled with the upper key and the upper shim by adjusting the thickness of the upper shim. Thereby, a load transmission path via the upper key and the upper shim is formed from the upper half region of the carrier ring toward the bearing housing. Therefore, the load received from the rotor shaft at the bearing portion can be reliably transmitted from the carrier ring to the bearing housing via the upper key and the upper shim. Therefore, the jumping of the rotor shaft during an emergency can be reliably suppressed by the bearing portion in the upper half area.

(2) In some embodiments, in the configuration of (1) above,
A concave groove is formed on the outer peripheral surface of the upper half region of the carrier ring,
The upper shim or the upper key is attached to the upper half region of the carrier ring with at least one of the upper shim or the upper key fitted in the concave groove.
According to the configuration of (2) above, when the upper shim and the upper key are attached to the carrier ring, the upper shim or the upper key can be prevented from falling off, and the working efficiency can be improved.

(3) In one embodiment, in the configuration of (2) above,
The upper shim is fitted in the groove so as to be sandwiched between the upper half region of the carrier ring and the upper key,
A part of the upper key protrudes from the concave groove and is in contact with the bearing housing.
According to the configuration of (3) above, when the upper shim and the upper key are attached to the carrier ring, the upper shim can be prevented from falling off, and the working efficiency can be improved.

(4) In some embodiments, in any one of the above configurations (1) to (3),
At least one lower key attached to the lower half region of the carrier ring so as to be located between the lower half region of the carrier ring and the bearing housing;
At least one lower shim attached to the lower half region of the carrier ring so as to be positioned between either the lower half region of the carrier ring or the bearing housing and the lower key; Further prepare.
When the carrier ring is positioned with respect to the bearing housing by the lower shim, the distance between the upper half region of the carrier ring and the bearing housing may differ depending on the position of the carrier ring. In that case, by adjusting the thickness of the upper shim, a load transmission path between the upper half region of the carrier ring and the bearing housing can be reliably formed.

(5) In some embodiments, in any one of the above configurations (1) to (4),
The bearing portion is
A lower bearing portion held by the lower half region of the carrier ring and configured to support the rotor shaft from below;
An upper bearing portion that is held by the upper half region of the carrier ring and configured to hold down the spring shaft from above;
including.
According to the configuration of (5) above, the load received from the rotor shaft at the upper bearing portion is appropriately transmitted from the carrier ring to the bearing housing via the upper key and the upper shim. For this reason, the upper bearing portion can surely suppress the jumping of the rotor shaft.

(6) In one embodiment, in any one of the configurations (1) to (5),
The upper bearing portion includes a semi-annular bearing portion provided on the inner peripheral side of the upper half region of the carrier ring.
According to the configuration of (6) above, the upper ring bearing portion functioning like a sleeve bearing is formed in the upper half region of the carrier ring by the semi-annular bearing portion provided on the inner peripheral side of the upper half region of the carrier ring. can do. Thereby, the effect of suppressing the jumping of the rotor shaft by the upper bearing portion can be enhanced.

(7) A method for installing a bearing device according to at least one embodiment of the present invention includes:
A bearing device installation method comprising: a bearing portion; a carrier ring provided on an outer peripheral side of the bearing portion and configured to hold the bearing portion; and a bearing housing provided on an outer peripheral side of the carrier ring. There,
The lower half region of the carrier ring is located on the inner peripheral side of the bearing housing via the lower key, and the outer bearing surface of the rotor shaft is held on the lower bearing portion held by the lower half region of the carrier ring. Arranging the lower half region of the carrier ring and the rotor shaft such that the lower regions face each other;
Using at least one lower shim located between either the lower half region of the carrier ring or the bearing housing and the lower key, the lower half region of the carrier ring and the lower bearing Adjusting the height of the part,
After the step of adjusting the height, arranging the upper half region of the carrier ring so that the upper half region of the carrier ring faces the upper region of the outer peripheral surface of the rotor shaft;
After the step of placing the upper half region, using at least one upper shim located between either the upper half region of the carrier ring or the bearing housing and the upper key, the upper key and Adjusting the thickness of the upper shim so that a load transmission path from the upper half region of the carrier ring to the bearing housing via the upper shim is formed;
It is characterized by providing.

  In the bearing device installation method of (7) above, the height of the lower half region of the carrier ring and the lower bearing portion is adjusted using at least one lower shim. Thus, when the carrier ring is positioned with respect to the bearing housing by the lower shim, the distance between the upper half region of the carrier ring and the bearing housing may differ depending on the position of the carrier ring. Therefore, after adjusting the height of the lower half area of the carrier ring and the lower bearing portion, the upper half area of the carrier ring is arranged, and between the upper half area of the carrier ring or the bearing housing and the upper key. The thickness of the upper shim is adjusted using at least one upper shim located in As a result, a load transmission path via the upper key and the upper shim is formed from the upper half region of the carrier ring toward the bearing housing, and the load received from the rotor shaft at the bearing portion is transferred from the carrier ring to the upper key and the upper shim. Can be reliably transmitted to the bearing housing. Therefore, the jumping of the rotor shaft during an emergency can be reliably suppressed by the bearing portion in the upper half area.

(8) In some embodiments, in the method of (7) above,
The bearing portion is
The upper bearing part is comprised by the upper half area | region of the said carrier ring, and it comprised so that the bounce of the said rotor shaft might be suppressed from upper direction.
According to the method (8), the load received from the rotor shaft at the upper bearing portion is appropriately transmitted from the carrier ring to the bearing housing via the upper key and the upper shim. For this reason, the upper bearing portion can surely suppress the jumping of the rotor shaft.

(9) In one embodiment, in the method of (8) above,
The upper bearing portion includes a semi-annular bearing portion provided on the inner peripheral side of the upper half region of the carrier ring.
According to the above method (9), the durability of the upper bearing portion can be improved by the semi-annular bearing portion provided on the inner peripheral side of the upper half region of the carrier ring.

(10) A rotating machine according to at least one embodiment of the present invention includes:
The bearing device according to any one of (1) to (6) above;
A rotating shaft supported by the bearing device.

  According to at least one embodiment of the present invention, at least one upper shim attached to the upper half region of the carrier ring so as to be located between either the upper half region of the carrier ring or the bearing housing and the upper key. Thus, the load received from the rotor shaft at the bearing portion can be reliably transmitted to the bearing housing via the upper key and the upper shim. Therefore, the jumping of the rotor shaft during an emergency can be reliably suppressed by the bearing portion in the upper half area.

It is sectional drawing along the axial direction of the bearing apparatus which concerns on one Embodiment. It is the sectional view on the AA line of FIG. It is the elements on larger scale of the bearing apparatus which concerns on one Embodiment. It is the BB sectional view taken on the line of FIG. It is the elements on larger scale of the bearing apparatus which concerns on one Embodiment. It is CC sectional view taken on the line of FIG. It is a flowchart which shows the installation method of the bearing apparatus which concerns on one Embodiment.

  Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.

First, an overall configuration common to the bearing device 10 according to some embodiments will be described with reference to FIGS. 1 and 2.
FIG. 1 is a cross-sectional view along the axial direction of a bearing device 10 according to an embodiment. 2 is a cross-sectional view taken along line AA in FIG. FIG. 2 is a cross section orthogonal to the axial direction. In the present embodiment, the axial direction is the direction of the central axis O of the rotor shaft 2 supported by the bearing device 10, the radial direction is the radial direction of the rotor shaft 2, and the circumferential direction is the rotor shaft 2. In the circumferential direction.

  A bearing device 10 shown in FIGS. 1 and 2 is a tilting pad bearing (journal bearing) that employs a direct lubrication method as a lubrication method (oil supply method), and a first bearing pad 30 and a second bearing pad are disposed in a lower half region. 32 is arranged. Hereinafter, the illustrated bearing device 10 will be described as an example, but the bearing device 10 according to the present embodiment is not limited to this configuration. For example, the bearing device 10 according to another embodiment may be a thrust bearing, or may employ an oil bath method or another lubrication method as a lubrication method. In another embodiment, two additional bearing pads may be arranged in the upper half region, and a total of four bearing pads may be attached in the circumferential direction. A configuration in which more than one bearing pad is attached may be used.

The rotating machine 1 to which the bearing device 10 according to the present embodiment is applied includes a turbine such as a gas turbine or a steam turbine (for example, a steam turbine of a nuclear power plant) or a turbine for driving a machine, a wind machine such as a wind power generator, Or a supercharger etc. are mentioned.
Here, the rotary machine 1 includes a rotor shaft 2 that is rotationally driven, a bearing housing 3 that houses the rotor shaft 2, and a bearing device 10 that supports the rotor shaft 2. Specifically, the bearing housing 3 includes an upper half bearing housing 4 and a lower half bearing housing 5. Each of the upper half bearing housing 4 and the lower half bearing housing 5 has an inner peripheral surface such that a cross section perpendicular to the axial direction has a semicircular arc shape.

  In some embodiments, the bearing device 10 includes bearing pads 30 and 32 serving as bearing portions, a carrier ring 11, a bearing housing 3, an upper key 40, and an upper shim 41.

Hereinafter, a specific configuration example of each member of the bearing device 10 will be described.
The carrier ring 11 includes an upper half carrier ring 12 and a lower half carrier ring 13. The upper half carrier ring 12 and the lower half carrier ring 13 have inner circumferential surfaces 12a and 13a and outer circumferential surfaces 12b and 13b, respectively, such that the cross section perpendicular to the axial direction is a semicircular arc. In the illustrated example, the carrier ring 11 is divided into an upper half carrier ring 12 and a lower half carrier ring 13. However, the carrier ring 11 may be an integral structure.

  A pair of side plates 17 and 18 are disposed along the outer periphery of the rotor shaft 2 on both ends of the carrier ring 11 in the axial direction. The side plates 17 and 18 are formed in a disc shape, and holes 17a and 18a through which the rotor shaft 2 passes are formed in the center. These side plates 17 and 18 moderately suppress the leakage of lubricating oil supplied from oil supply nozzles 25 to 29 described later to the outside.

  In the upper half carrier ring 12, guide metals (semi-annular bearing portions) 20 and 21 are attached to the inner peripheral surface 12a in order to mainly suppress the bounce of the rotor shaft 2 from above. For example, a pair of guide metals 20 and 21 are attached to both ends of the upper half carrier ring 12 in the axial direction and inside the side plates 17 and 18 in the axial direction. The guide metals 20 and 21 are formed in a semicircular shape. In the present embodiment, the bearing portion includes bearing pads 30 and 32 or guide metals 20 and 21.

The upper half carrier ring 12 and the lower half carrier ring 13 are provided with at least one oil supply nozzle 25 to 29.
In the example shown in FIG. 2, when the rotor shaft 2 rotates clockwise as indicated by an arrow S in the figure, the first oil supply nozzle 25, the second oil supply nozzle 26, A total of five oil supply nozzles including three oil supply nozzles 27, a fourth oil supply nozzle 28, and a fifth oil supply nozzle 29 are provided. The first oil supply nozzle 25 and the second oil supply nozzle 26 are arranged side by side in the circumferential direction on the upstream side of the first bearing pad 30 located on the upstream side. A gap may be provided between the second oil supply nozzle 26 and the upstream end of the bearing pad 30. The third oil supply nozzle 27 and the fourth oil supply nozzle 28 are arranged side by side in the circumferential direction between the first bearing pad 30 and the second bearing pad 32 located on the downstream side of the first bearing pad 30. ing. A gap may be provided between the downstream end portion of the first bearing pad 30 and the third oil supply nozzle 27. A gap may be provided between the fourth oil supply nozzle 28 and the upstream end portion of the second bearing pad 32. The fifth oil supply nozzle 29 is disposed on the downstream side of the second bearing pad 32. A gap may be provided between the fifth oil supply nozzle 29 and the second bearing pad 32.
In addition, in the example shown in FIG. 2, although it has the structure provided with the five oil supply nozzles 25-29, the arrangement structure of the oil supply nozzle is not limited to this.

  A lubricating oil supply path (not shown) is formed inside the carrier ring 11. The lubricating oil supplied to the lubricating oil supply path is sent to each of the oil supply nozzles 25 to 29, and is ejected from the oil supply nozzles 25 to 29 in the vicinity of the bearing pads 30 and 32.

  At least one upper key 40 and at least one upper shim 41 are disposed between the upper half carrier ring 12 and the upper half bearing housing 4. Similarly, at least one lower key 50 and at least one lower shim 51 are disposed between the lower half carrier ring 13 and the lower half bearing housing 5. As shown in the drawing, when the carrier ring 11 is not a structure divided into two parts, ie, an upper half carrier ring 12 and a lower half carrier ring 13, but is a single structure or a structure divided into three or more guides The metals 20 and 21, the upper key 40, and the upper shim 41 may be provided in the upper half area of the carrier ring 11. In this case, the lower key 50 and the lower shim 51 may be provided in the majority region of the carrier ring 11. The specific configurations of the upper key 40 and the upper shim 41, and the lower key 50 and the lower shim 51 will be described later.

  On the outer peripheral surface 13 b of the lower half carrier ring 13, there is provided an anti-rotation convex portion 15 protruding outward in the radial direction. The rotation preventing projection 15 is located at the upstream end of the lower half carrier ring 13 in the rotation direction S of the rotor shaft 2. On the other hand, the lower half bearing housing 5 is formed with a recess 5b for preventing rotation. The rotation stopper recess 5 b is positioned at the upstream end of the lower half bearing housing 5 in the rotational direction S of the rotor shaft 2 so as to correspond to the rotation stopper protrusion 15. The lower half carrier ring 13 rotates together with the rotor shaft 2 by engaging the rotation stopper convex portion 15 of the lower half carrier ring 13 with the rotation stopper concave portion 5 b of the lower half bearing housing 5. Can be prevented.

  The bearing pads 30 and 32 are provided on the inner peripheral side of the lower half carrier ring 13 and are configured to support the rotor shaft 2 from below. One bearing pad 30 is provided along the outer periphery of the rotor shaft 2 on the inner peripheral side of the lower half carrier ring 13. The other bearing pad 32 is provided along the outer periphery of the rotor shaft 2 on the inner peripheral side of the lower half carrier ring 13 and downstream of the bearing pad 30 in the rotational direction S of the rotor shaft 2.

  The bearing pads 30 and 32 have an inner peripheral surface facing the rotor shaft 2 and an outer peripheral surface facing the lower half carrier ring 13. Each of the inner peripheral surface and the outer peripheral surface has a curved shape so as to have a curvature corresponding to the rotor shaft 2 in the circumferential direction, and in the axial direction, a straight line along the axial direction of the rotor shaft 2. It is formed in a shape.

  Here, specific configuration examples of the upper key 40 and the upper shim 41 and the lower key 50 and the lower shim 51 will be described with reference to FIGS.

3 and 4 show an upper key 40 and an upper shim 41 disposed between the upper half carrier ring 12 and the upper half bearing housing 4. FIG. 3 is a partially enlarged view of the bearing device according to the embodiment. 4 is a cross-sectional view taken along line BB in FIG. 3 and 5 show the key structure of the bearing device 10 as viewed from the same direction as FIG.
As shown in these drawings, a concave groove 12 c is formed on the outer peripheral surface 12 b of the upper half carrier ring 12. For example, the concave groove 12c has a circular shape when the outer peripheral surface 12b of the upper half carrier ring 12 is viewed from the outside in the radial direction. Further, the cross section perpendicular to the axial direction (see FIG. 3) and the cross section including the axial direction (see FIG. 4) are rectangular.

The upper key 40 is attached to the upper half carrier ring 12 so as to be positioned between the upper half carrier ring 12 and the upper half bearing housing 4. In the example shown in FIG. 2, two upper keys 40 are attached to the upper half carrier ring 12 in the circumferential direction. However, the arrangement and the number of installation of the upper key 40 are not limited to this.
The upper shim 41 is attached to the upper half carrier ring 12 so as to be positioned between the upper half carrier ring 12 and the upper key 40. In the illustrated example, two upper shims 41 are attached to the upper half carrier ring 12 in a circumferential direction corresponding to the upper key 40. However, the arrangement and number of the upper shims 41 are not limited to this. Although not shown, in another embodiment, the upper shim 41 is attached to the upper half carrier ring 12 so as to be positioned between the upper key 40 and the lower half bearing housing 5.
The upper shim 41 or the upper key 40 is in a state in which at least one of the upper shim 41 or the upper key 40 is fitted in the concave groove 12c (in the example shown in FIGS. 3 and 4, the upper shim 41 and the upper key 40 are fitted). Is attached to the upper half carrier ring 12.

In this configuration, an upper key 40 and an upper shim 41 are arranged between the upper half carrier ring 12 and the upper half bearing housing 4 so as to contact each other in the radial direction. As a result, a load transmission path 48 via the upper key 40 and the upper shim 41 is formed from the upper half carrier ring 12 toward the lower half bearing housing 5. Therefore, the load received from the rotor shaft 2 by the guide metal 21 can be reliably transmitted from the upper half carrier ring 12 to the upper half bearing housing 4 via the upper key 40 and the upper shim 41. Therefore, the jumping of the rotor shaft 2 in an emergency can be reliably suppressed by the guide metal 21.
Further, since the upper shim 41 or the upper key 40 is attached to the upper half carrier ring 12 with at least one of the upper shim 41 or the upper key 40 fitted in the concave groove 12c, the upper half carrier When the upper key 40 and the upper shim 41 are attached to the ring 12, the upper key 40 and the upper shim 41 can be prevented from falling off, and the working efficiency can be improved.

Further, the upper shim 41 is fitted in the concave groove 12c so as to be sandwiched between the upper half carrier ring 12 and the upper key 40, and the upper key 40 is partially protruded from the concave groove 12c so as to protrude to the lower half bearing. It may be in contact with the housing 5.
As a result, when the upper shim 41 and the upper key 40 are attached to the upper half carrier ring 12, the upper shim 41 can be prevented from falling off, and the working efficiency can be improved.

  The upper key 40 may have a curved surface in contact with the lower half bearing housing 5 on a surface orthogonal to the axial direction (see FIG. 3). Further, the upper key 40 may have a curved surface in contact with the lower half bearing housing 5 on a surface including the axial direction (see FIG. 4). Thereby, alignment adjustment of the rotor shaft 2 is also possible. For example, the upper key 40 is a spherical key. The upper key 40 and the upper shim 41 may be fastened to the upper half carrier ring 12 by bolts (not shown).

5 and 6 show a lower key 50 and a lower shim 51 disposed between the lower half carrier ring 13 and the lower half bearing housing 5.
FIG. 5 is a partially enlarged view of the bearing device 10 according to the embodiment. 6 is a cross-sectional view taken along the line CC of FIG.

The lower key 50 is attached to the lower half carrier ring 13 so as to be positioned between the lower half carrier ring 13 and the lower half bearing housing 5. In the illustrated example, two lower keys 50 are attached to the lower half carrier ring 13 side by side in the circumferential direction. However, the arrangement and the number of installation of the lower key 50 are not limited to this.
The lower shim 51 is attached to the lower half carrier ring 13 so as to be positioned between the lower half carrier ring 13 and the lower key 50. In the illustrated example, two lower shims 51 are attached to the lower half carrier ring 13 in a circumferential direction corresponding to the lower key 50. However, the arrangement and the number of the lower shims 51 are not limited to this. Although not shown, in other embodiments, the lower shim 51 is attached to the lower half carrier ring 13 so as to be positioned between the lower key 50 and the lower half bearing housing 5.
The lower shim 51 or the lower key 50 is in a state where at least one of the lower shim 51 or the lower key 50 is fitted in the concave groove 13c (in the example shown in FIGS. 3 and 4, the lower shim 51 and the lower key 50 are With the key 50 fitted), it is attached to the lower half carrier ring 13.

In this configuration, the lower key 50 and the lower shim 51 are disposed between the lower half carrier ring 13 and the lower half bearing housing 5 so as to contact each other in the radial direction. Thus, the lower half carrier ring 13 can be positioned with respect to the lower half bearing housing 5 by adjusting the thickness of the lower shim 51. That is, when the lower half carrier ring 13 is positioned with respect to the lower half bearing housing 5 by the lower shim 51, the upper half region and the lower half of the lower half carrier ring 13 depend on the position of the lower half carrier ring 13. The distance from the half bearing housing 5 may be different. In that case, if the thickness of the upper shim is adjusted, the load transmission path between the lower half carrier ring 13 and the lower half bearing housing 5 can be reliably formed.
Further, the lower shim 51 or the lower key 50 is attached to the lower half carrier ring 13 with at least one of the lower shim 51 or the lower key 50 fitted in the concave groove 13c. When the lower key 50 and the lower shim 51 are attached to the lower half carrier ring 13, the lower key 50 and the lower shim 51 can be prevented from falling off, and the working efficiency can be improved.

Further, the lower shim 51 is fitted in the concave groove 12c so as to be sandwiched between the lower half carrier ring 13 and the lower key 50, and the lower key 50 is partially protruded from the concave groove 12c to be lowered. It may be in contact with the half bearing housing 5.
Accordingly, when the lower shim 51 and the lower key 50 are attached to the lower half carrier ring 13, the lower shim 51 can be prevented from falling off, and the working efficiency can be improved.

  The lower key 50 may have a curved surface that contacts the lower half bearing housing 5 on a surface (see FIG. 5) orthogonal to the axial direction. Further, the lower key 50 may have a curved surface in contact with the lower half bearing housing 5 on the surface including the axial direction (see FIG. 6). As a result, the alignment of the rotor shaft 2 can be adjusted. For example, the lower key 50 is a spherical key. The lower key 50 and the lower shim 51 may be fastened to the lower half carrier ring 13 by bolts (not shown).

  Next, with reference to FIG. 7, the installation method of the bearing apparatus which concerns on one Embodiment is demonstrated. FIG. 7 is a flowchart showing a method of installing the bearing device according to one embodiment. Here, description will be made using the symbols described in FIGS. 1 to 6 as appropriate.

First, in step S1, the lower half bearing housing 5 is disposed.
Next, in step S2, the lower region of the outer peripheral surface of the rotor shaft 2 faces the lower bearing portion (the bearing pads 30 and 32 in the example shown in FIGS. 1 and 2) held by the lower half carrier ring 13. Thus, the lower half carrier ring 13 and the rotor shaft 2 are arranged. At this time, at least one lower shim 51 located between either the lower half carrier ring 13 or the lower half bearing housing 5 and the lower key 50 is used to lower the lower half carrier ring 13 and the lower half carrier ring 13. Adjust the height of the side bearing.
In step S <b> 3, the upper half carrier ring 12 is arranged so that the upper half carrier ring 12 faces the upper region of the outer peripheral surface of the rotor shaft 2.
Subsequently, in step S4, the upper key 40 and the upper shim are used by using at least one upper shim 41 positioned between either the upper half carrier ring 12 or the upper half bearing housing 4 and the upper key 40. The thickness of the upper shim 41 is adjusted so that a load transmission path 48 from the upper half carrier ring 12 to the upper half bearing housing 4 is formed via 41.
In step S4, the upper half bearing housing 4 is disposed.

  In the installation method of the bearing device 10 described above, after the lower half carrier ring 13 and the rotor shaft 2 are disposed, the height of the lower half carrier ring 13 and the lower bearing portion is set using at least one lower shim 51. Is to adjust. In this way, when the lower half carrier ring 13 is positioned with respect to the lower half bearing housing 5 by the lower shim 51, the upper half carrier ring 12 and the upper half are dependent on the position of the lower half carrier ring 13. The distance from the bearing housing 4 may be different. Therefore, after adjusting the height of the lower half carrier ring 13 and the lower bearing portion, the upper half carrier ring 12 is disposed, and either the upper half carrier ring 12 or the upper half bearing housing 4 and the upper side are arranged. The thickness of the upper shim 41 is adjusted by using at least one upper shim 41 located between the key 40 and the key 40. As a result, a load transmission path 48 through the upper key 40 and the upper shim 41 is formed from the upper half carrier ring 12 to the upper half bearing housing 4, and the rotor shaft is formed by the bearing portions (bearing pads 30, 32). 2, the load received from the upper half carrier ring 12 can be reliably transmitted to the upper half bearing housing 4 via the upper key 40 and the upper shim 41. Therefore, the jumping of the rotor shaft 2 at the time of emergency can be reliably suppressed by the bearing portion in the upper half area.

In the above-described method for installing the bearing device 10, the bearing portion includes the upper bearing portion (guide metal 20, 21) that is held by the upper half carrier ring 12 and configured to suppress the jumping of the rotor shaft 2 from above. You may go out.
Thereby, the load received from the rotor shaft at the upper bearing portion is appropriately transmitted from the upper half carrier ring 12 to the upper half bearing housing 4 via the upper key 40 and the upper shim 41. For this reason, the upper bearing portion can surely suppress the jumping of the rotor shaft 2.

Further, in the above-described method for installing the bearing device 10, the upper bearing portion is guide metal (semi-annular bearing portion) 20, 21 provided on the inner peripheral side of the upper half carrier ring 12. A bearing alloy layer may be formed on the inner peripheral side of the bearing. Alternatively, the guide metals 20 and 21 may be entirely made of a bearing alloy.
Thus, the durability of the upper bearing portion can be improved by the guide metals 20 and 21 provided on the inner peripheral side of the upper half carrier ring 12.

  As described above, according to the embodiment of the present invention, the upper half carrier ring 12 is positioned between either the upper half carrier ring 12 or the upper half bearing housing 4 and the upper key 40. At least one upper shim 41 to be attached to the upper half of the upper half of the upper shaft 40, and the upper half of the load received from the rotor shaft 2 by the bearing portion (for example, the guide metal 20, 21) via the upper key 40 and the upper shim 41. It can be transmitted to the bearing housing 4. Therefore, the jumping of the rotor shaft 2 at the time of emergency can be reliably suppressed by the bearing portion in the upper half area.

The present invention is not limited to the above-described embodiments, and includes forms obtained by modifying the above-described embodiments and forms obtained by appropriately combining these forms.
For example, in the present embodiment, a tilting pad bearing is illustrated as the bearing device 10, but the bearing device 10 is not limited to this, and may be another type of bearing such as a sleeve bearing.
Moreover, in this embodiment, although illustrated about the case where the one upper key 40 or the lower key 41 is arrange | positioned at one concave groove 12c, 13c, several upper key 40 or A plurality of lower keys 41 may be arranged. For example, two or more upper keys 40 or lower keys 41 divided in the axial direction may be disposed in one concave groove 12c, 13c.

For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expression “comprising”, “including”, or “having” one constituent element is not an exclusive expression that excludes the presence of the other constituent elements.

DESCRIPTION OF SYMBOLS 1 Rotating machine 2 Rotor shaft 3 Bearing housing 4 Upper half bearing housing 5 Lower half bearing housing 10 Bearing device 11 Carrier ring 12 Upper half carrier ring 13 Lower half carrier ring 17, 18 Side plate 20, 21 Guide metal ( (Semi-annular bearing)
25 to 29 Lubrication nozzles 30 and 32 Bearing pad 40 Upper key 41 Upper shim 50 Lower key 51 Lower shim

Claims (12)

A bearing portion;
A carrier ring provided on the outer peripheral side of the bearing portion and configured to hold the bearing portion;
A bearing housing provided on the outer peripheral side of the carrier ring;
At least one upper key attached to the upper half region of the carrier ring so as to be located between the upper half region of the carrier ring and the bearing housing;
At least one upper shim attached to the upper half region of the carrier ring so as to be located between either the upper half region of the carrier ring or the bearing housing and the upper key;
A bearing device comprising: A concave groove is formed on the outer peripheral surface of the upper half region of the carrier ring,
The upper shim or the upper key is attached to the upper half region of the carrier ring in a state where at least one of the upper shim or the upper key is fitted in the concave groove. The bearing device described in 1. The upper shim is fitted in the groove so as to be sandwiched between the upper half region of the carrier ring and the upper key,
The bearing device according to claim 2, wherein a part of the upper key protrudes from the concave groove and is in contact with the bearing housing. At least one lower key attached to the lower half region of the carrier ring so as to be located between the lower half region of the carrier ring and the bearing housing;
At least one lower shim attached to the lower half region of the carrier ring so as to be positioned between either the lower half region of the carrier ring or the bearing housing and the lower key; The bearing device according to any one of claims 1 to 3, further comprising a bearing device. The bearing portion is
A lower bearing portion held by the lower half region of the carrier ring and configured to support the rotor shaft from below;
An upper bearing portion that is held by the upper half region of the carrier ring and configured to hold down the spring shaft from above;
The bearing device according to any one of claims 1 to 4, wherein the bearing device is included.   The bearing device according to claim 5, wherein the upper bearing portion includes a semi-annular bearing portion provided on an inner peripheral side of the upper half region of the carrier ring. One of the upper key or the upper shim is in contact with the upper half region of the carrier ring, and the other of the upper key or the upper shim is in contact with the bearing housing, so that the bearing from the upper half region of the carrier ring. The bearing device according to any one of claims 1 to 6, wherein a load transmission path through the upper key and the lower key is formed toward the housing. A bearing device installation method comprising: a bearing portion; a carrier ring provided on an outer peripheral side of the bearing portion and configured to hold the bearing portion; and a bearing housing provided on an outer peripheral side of the carrier ring. There,
The lower half region of the carrier ring is located on the inner peripheral side of the bearing housing via the lower key, and the outer bearing surface of the rotor shaft is held on the lower bearing portion held by the lower half region of the carrier ring. Arranging the lower half region of the carrier ring and the rotor shaft such that the lower regions face each other;
Using at least one lower shim located between either the lower half region of the carrier ring or the bearing housing and the lower key, the lower half region of the carrier ring and the lower bearing Adjusting the height of the part,
After the step of adjusting the height, arranging the upper half region of the carrier ring so that the upper half region of the carrier ring faces the upper region of the outer peripheral surface of the rotor shaft;
After the step of placing the upper half region, using at least one upper shim located between either the upper half region of the carrier ring or the bearing housing and the upper key, the upper key and Adjusting the thickness of the upper shim so that a load transmission path from the upper half region of the carrier ring to the bearing housing via the upper shim is formed;
A method for installing a bearing device, comprising: The bearing portion is
The bearing device installation method according to claim 8 , further comprising an upper bearing portion that is held by an upper half region of the carrier ring and is configured to press up the spring shaft from above. The method for installing a bearing device according to claim 9 , wherein the upper bearing portion includes a semi-annular bearing portion provided on an inner peripheral side of the upper half region of the carrier ring. In the step of adjusting the thickness of the upper shim, one of the upper key or the upper shim is in contact with the upper half region of the carrier ring, and the other of the upper key or the upper shim is in contact with the bearing housing. The method for installing a bearing device according to any one of claims 8 to 10, wherein the thickness of the upper shim is adjusted. A bearing device according to any one of claims 1 to 7 ,
And a rotating shaft supported by the bearing device.

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