KR20180040835A - Bearing with magnet - Google Patents

Abstract

According to one embodiment of the present invention, a journal bearing comprises: a housing including an upper housing and a lower housing; a bearing pivot mounted inside the housing; and a plurality of tilting pads positioned to be movable on the bearing pivot. A magnet is provided between at least the one tilting pad and the one housing. The tilting pad which is to be a state free from a load by a rotary body rotating at the center of the journal bearing can be attached to the magnet, thereby preventing unnecessary vibration, and damage and wear of bearing parts.

Description

BEARINGS WITH MAGNET (BEARING WITH MAGNET)

The present invention relates to a bearing, and more particularly to a bearing having a magnet between a tilting pad and a bearing housing.

Generally, fluid lubrication tilting pad journal bearings are widely applied to high-speed rotating machines such as gas turbines due to their excellent operating stability.

1 of the conventional journal bearing 10 having tilting pads 5 and 6, only the lower pad 5 receives a load because the rotating body 3 applies a load in the gravity direction, The pad 6 receives little load. When the rotating body 3 rotates at a high speed, vibration occurs in the upper pad 6 due to a spragging phenomenon, which often causes damage to the bearing metal parts.

Disclosure of Invention Technical Problem [8] The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a tilting pad for a tilting pad, And to prevent the bearing from being damaged due to vibration.

According to an aspect of the present invention, there is provided a journal bearing comprising: a housing including an upper housing and a lower housing; A bearing pivot mounted within the housing; And a plurality of tilting pads positioned to be movable on the bearing pivot, wherein a magnet is provided between the at least one tilting pad and the housing.

The magnet may include a permanent magnet, an electromagnet, or the like. In the case of adopting a permanent magnet, it is convenient for installation and management. In the case of employing an electromagnet, it is possible to obtain the advantage of flexibility that the magnetic force can be controlled as necessary in consideration of changing conditions during operation. This allows journal bearings to be appropriately replaced depending on the equipment required.

The plurality of tilting pads may include an upper pad and a lower pad, wherein the upper and lower portions are referred to as a lower portion when viewed from the direction of gravity, and the upper portion and the lower portion, respectively. In this document, the upper pad indicates a tilting pad located at the upper half inside the journal bearing housing, and the lower pad similarly indicates a tilting pad located at the lower half inside the journal bearing housing.

The journal bearing according to the present embodiment may further include a magnet mounting portion detachably mounted to the housing. Here, the magnet mounting portion is configured to be detachable so as to facilitate the maintenance and repair of the bearing.

On the other hand, the magnet mounting portion can have various thicknesses, and the thickness can be adjusted according to the type and operating characteristics of the rotating body in which the journal bearing is used. When the rotation of the rotating body is accelerated in the journal bearing, a load is applied to the tilting pad provided at the upper portion of the rotating body, which has applied a load only to the tilting pad provided at the lower portion. At this time, the load applied to the upper pad varies depending on various factors such as the weight of the rotating body, the rotating speed, and the properties of the lubricating oil. The magnitude of the magnet needs to be changed according to the varying load. Lt; / RTI > (to the origin of the housing circular cross-section) also needs to be adjusted. Therefore, it is preferable that the thickness of the magnet mounting portion can be variously configured, and magnets having different thicknesses can be replaced.

In another embodiment, the magnet mount may extend in the longitudinal direction of the housing and have a plurality of mounting surfaces for mounting the magnet. Preferably, the plurality of mounting surfaces are different in height. That is, the height from the inner periphery of the housing to the respective mounting surfaces may be different when the magnet mounting portion is provided inside the housing. This is to make it possible to install a magnet on the most suitable mounting surface among a plurality of mounting surfaces of different heights when the height of the magnet is required to be adjusted. In this way, it is very convenient to manage, since it is possible to reduce the need to replace the magnet mounting portion which is substantially free of friction with other parts, and to change the position of the magnet only if necessary.

The magnet may be mounted directly on the housing, but the magnet is preferably mounted on the magnet mount.

The magnet may be installed between the tilting pad and the housing, but is preferably installed between the upper pad and the upper housing.

The magnet mounting portion may be installed between the tilting pad and the housing, but may be installed between the upper pad and the upper housing.

And a height adjusting shim detachable between the magnet and the magnet mounting portion.

The magnet may include a first surface capable of contacting the tilting pad and a second surface facing the magnet mount.

The tilting pad includes a first half and a second half in a linear symmetry relationship with the first half, the first surface of the magnet being capable of contacting the first half or second half of the tilting pad.

It is preferable that the first surface of the magnet makes contact with only the first half portion of the tilting pad or only the second half portion with respect to the tilting pad because the pad can be inclined only when the magnet is positioned on either side of the tilting pad.

The first surface is in contact with the tilting pad by magnetism, while the second surface is attached and fixed to the magnet mount.

The magnet may include a fixing portion to be fixed to the magnet mounting portion or the housing. The magnets may be threaded through the fixture, or may be clamped.

In one embodiment of the present invention, at least a portion of the first surface of the magnet may coincide with the outer surface of the tilting pad. A part of the first surface of the magnet is formed to fit into the outer surface of the tilting pad so that the effect of attaching the tilting pad to the magnet can be increased by the magnetism.

A point of the first surface of the magnet closest to the origin of the circular cross-section of the housing may be farther from the origin than the point at which the upper tilting pad contacts the bearing pivot. The tilting pad is tilted toward the side where the magnet is located when the tilting pad is located at a very high height because the tilting pad is located very close to the rotating body, It is preferable that a point at which the tilting pad contacts with the tilting pad and a tilting pad tilting reference is higher than a point at which the magnet touches the tilting pad.

In an embodiment of the present invention, the magnet may be an electromagnet.

The journal bearing may further include a magnetization and element device capable of controlling the magnetic force of the electromagnet. The magnetization and element device can sense the vibration applied to the electromagnet, and can control the magnetic force according to predetermined conditions. Thus, it is easy to achieve the object of the present invention, that is, the bearing damage due to vibration.

Similar to journal bearings, the magnets can also be applied to the pads of thrust bearings. That is, the thrust bearing among the bearings including the tilting pad according to the embodiment of the present invention includes: a bearing body; Bearing pivots formed on both sides of the bearing body; And a tilting pad positioned to be movable on the bearing pivot, wherein a magnet may be installed between the tilting pad and the bearing body.

The thrust bearing may further include a height adjustment shim releasable between the magnet and the bearing body.

The magnet may be an electromagnet.

The thrust bearing may further include a magnetization and element device capable of controlling the magnetic force of the electromagnet.

The magnetization and element device can sense the vibration applied to the electromagnet, and can control the magnetic force according to predetermined conditions.

It is to be understood that other configurations and additional or alternative embodiments of the present invention may be employed by the ordinary skilled artisan, either alone or in combination.

According to the journal bearing according to an embodiment of the present invention, a tilting pad that is free from a load due to a rotating body rotating at the center of a journal bearing is attached to a magnet to prevent unnecessary vibration, Wear can be prevented.

1 is a sectional view of a journal bearing including a conventional tilting pad.
2 is a sectional view of a journal bearing including a tilting pad according to a first embodiment of the present invention.
3 is a sectional view of a journal bearing including a tilting pad according to a first embodiment of the present invention.
4 is a sectional view of a thrust bearing including a tilting pad according to a first embodiment of the present invention.
5 is a sectional view of a journal bearing including a tilting pad according to a second embodiment of the present invention.
6 is a sectional view of a journal bearing including a tilting pad according to a second embodiment of the present invention.
7 is a cross-sectional view of a thrust bearing including a tilting pad according to a second embodiment of the present invention.

Hereinafter, embodiments of the oil filter module according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view showing a first embodiment of the present invention. The journal bearing includes a housing including an upper housing 1 and a lower housing 2, a bearing pivot 4 spaced at an angle from the housing, And a plurality of tilting pads (6) partially in contact with the bearing pivot (4). Since the rotating body 3 mainly applies a load in the downward direction, it rotates and rubs on the dark colored lower pad 5 located at the lower half.

The upper pads 6 which are relatively less loaded on the rotating body 3 are attached to the bearing pivot 4 and are in contact with the magnets 8.

At this time, the upper pad 6 serves as a fixed pad, and vibration is prevented because the upper pad 6 maintains contact with the magnet 8 due to the magnetism of the magnet 8.

However, when the rotation of the rotating body is accelerated, a partial load is applied to the upper pad 6. At this time, the upper pad 6 is separated from the magnet 8 at this time. And functions as an original tilting pad in the same manner as the lower pad 5 from the moment it is separated.

The magnet (8) is biased to one side of the upper pad (6). A magnet 8 is installed next to the bearing pivot 4 and the bearing pivot 4 and the magnet 8 are installed between the upper pad 6 and the inner wall of the housing. It is preferable that the magnets 8 are biased to one side of the upper pad 6 as shown in Fig. 2, the height of the magnet 8 from the inner wall of the housing is preferably lower than the height of the bearing pivot 4 from the inner wall of the housing. So that the original function of the tilting pad can be performed.

The magnet mounting portion 7 is rigidly mounted on the inner wall of the housing to accommodate the magnet 8. The first surface 8a of the magnet 8 comes into tight contact with the upper pad 6. [ The second surface 8b of the magnet 8 is in intimate contact with and preferably firmly fixed to the magnet mounting 7.

The upper pad 6 may be inclined in the direction of a double arrow represented by a two-dot chain line. However, in the direction in which the magnet 8 is present, it can be inclined only to the point where it contacts the magnet 8. [

In Fig. 2, the rotating body 3 rotates in the counterclockwise direction, so that the eccentricity e and the eccentricity A are formed. Generally, the shortening severity A is formed on the right side of the vertical axis when the rotating body 3 rotates counterclockwise as shown in FIG. 2, and may be formed on the left side of the longitudinal axis when the rotating body 3 rotates clockwise. This reflects the direction of the load in the direction of rotation. The larger the rotational body 3 is, the smaller the severeness A becomes, and as the rotation becomes faster, the severeness A becomes larger.

In Fig. 2, the center distance between the center point of the rotating body 3 and the center point of the journal bearing is expressed by the eccentricity e. In general, the eccentric e is located at the right lower end of the journal bearing when the rotating body 3 rotates counterclockwise. When the rotating body 3 rotates clockwise, the eccentric e is positioned at the lower left position .

The rotation of the rotating body is accelerated and the rotating body 3 may transmit the load of the upper pad 6. In this case, the upper pad 6 is required. In this case, May be located above the center point.

Referring to FIG. 3, a height adjustment shim 80 is additionally shown in the embodiment of FIG. The height adjusting padding 80 is interposed between the magnet mounting portion 7 and the magnet 8, preferably between the second surface 8b of the magnet 8 and the groove of the magnet mounting portion 7. [ The height adjusting shim 80 is engageable with the groove of the magnet mounting portion 7 and the second surface 8b of the magnet 8. Therefore, when the magnet is damaged due to long-term use or when the height of the magnet is to be adjusted, only the height adjusting shim 80 is replaced and maintenance can be easily performed.

4 is a cross-sectional view of a thrust bearing including a tilting pad according to a first embodiment of the present invention. The thrust bearing includes a bearing main body 53, a magnet 58, a height adjustment shim 80 and tilting pads 55 and 56. On both sides of the bearing main body 53, there are one projected bearing pivot 54 .

An oil nozzle 87 may be installed at one end of both sides of the bearing main body 53 provided with the respective tilting pads 55, 56. The first oil nozzle 87 and the second oil nozzle 88 are connected to the first control valve 85 and the second control valve 86 so that they can inject oil according to the direction in which thrust acts. 4, the thrust is generated in the direction in which the first tilting pad 55 is located on the side where the second tilting pad 56 is located. A friction force is generated between the second tilting pad 56 and the rotating object so that the second control valve 86 operates to lubricate the second tilting pad 56 and the second tilting pad 56 through the second oil nozzle 88. [ Oil is sprayed. If the rotation is reversed, the lubricating oil must be supplied to the first tilting pad 55, so that the first control valve 85 is operated to supply oil to the first tilting pad 56 through the first oil nozzle 87 .

In this case also, the height adjusting padding 80 can be interposed between the magnet 58 and the bearing main body 53. The height adjustment shim 80 is coupled to the bearing body 53, and the magnet 58 can also be coupled thereto. Therefore, when the magnet is damaged due to long-term use or when the height of the magnet is to be adjusted, only the height adjusting shim 80 is replaced and maintenance can be easily performed.

5 is a cross-sectional view showing a second embodiment of the present invention. The journal bearing includes a housing including an upper housing 1 and a lower housing 2, a bearing pivot 4 spaced at a certain angle in the housing, And a plurality of tilting pads (6) partially in contact with the bearing pivot (4). Since the rotating body 3 mainly applies a load in the downward direction, it rotates and rubs on the dark colored lower pad 5 located at the lower half.

In the upper half, upper pads 6, which receive relatively less load on the rotary body 3, are attached to the bearing pivot 4 and are in contact with the electromagnet 8 '.

At this time, the upper pad 6 serves as a fixed pad, and when the electromagnet 8 'is controlled to be magnetized, contact can be maintained with the magnet 8, so that vibration is prevented. The control of the electromagnet 8 'is performed by connecting the magnetization and element device 30 to the electromagnet 8'. The magnetizing and element device 30 is designed to detect the occurrence of unnecessary vibration in the tilting pad and when the unnecessary vibration is sensed, the electromagnet 8 'is magnetized to move the tilting pad 6 to the electromagnet 8' Can be attached. However, the conditions under which the magnetizing and element device 30 operates may be varied depending on the working environment.

For example, when the rotation of the rotating body is accelerated, a partial load is applied to the upper pad 6. At this time, the electromagnet 8 'is separated from the element 8' so that the upper pad 6 is separated from the electromagnet 8 ' demagnetization. And functions as an original tilting pad in the same manner as the lower pad 5 from the moment it is separated.

The electromagnet 8 'is biased to one side of the upper pad 6. The electromagnet 8 'is installed next to the bearing pivot 4 and the bearing pivot 4 and the electromagnet 8' are installed between the upper pad 6 and the inner wall of the housing. It is preferable that the electromagnet 8 'is biased to one side of the upper pad 6 as shown in FIG. 2, the height of the electromagnet 8 'from the inner wall of the housing is preferably lower than the height of the bearing pivot 4 from the inner wall of the housing. So that the original function of the tilting pad can be performed.

The magnet mounting portion 7 is rigidly mounted on the inner wall of the housing to receive the electromagnet 8 '. The first surface 8a 'of the electromagnet 8' is in intimate contact with the top pad 6. The second surface 8b 'of the electromagnet 8' is in intimate contact with and preferably firmly fixed to the magnet mounting 7.

The upper pad 6 may be inclined in the direction of a double arrow represented by a two-dot chain line. However, in the direction of the electromagnet 8 ', only the point of contact with the electromagnet 8' can be inclined.

In Fig. 5, the rotating body 3 rotates in the counterclockwise direction, so that the eccentricity e and the eccentricity A are formed. 5, when the rotating body 3 rotates in the clockwise direction, it can be formed to the left side of the vertical axis. This reflects the direction of the load in the direction of rotation. The larger the rotational body 3 is, the smaller the severeness A becomes, and as the rotation becomes faster, the severeness A becomes larger.

5, the center distance between the center point of the rotating body 3 and the center point of the journal bearing is expressed by the eccentricity e. In general, the eccentric e is located at the right lower end of the journal bearing when the rotating body 3 rotates counterclockwise. When the rotating body 3 rotates clockwise, the eccentric e is positioned at the lower left position .

The rotation of the rotating body is accelerated and the rotating body 3 may transmit the load of the upper pad 6. In this case, the upper pad 6 is required. In this case, May be located above the center point.

Referring to FIG. 6, a height adjustment shim 80 is additionally shown in the embodiment of FIG. The height adjusting shim 80 is interposed between the magnet mounting portion 7 and the electromagnet 8 ', preferably between the second surface 8b' of the electromagnet 8 'and the groove of the magnet mounting portion 7 . The height adjusting shim 80 is engageable with the groove of the magnet mounting portion 7 and the second surface 8b 'of the electromagnet 8'. Therefore, when the magnet is damaged due to long-term use or when the height of the magnet is to be adjusted, only the height adjusting shim 80 is replaced and maintenance can be easily performed.

7 is a cross-sectional view of a thrust bearing including a tilting pad according to a second embodiment of the present invention. The thrust bearing includes a bearing body 53, an electromagnet 58 ', a height adjusting shim 80 and tilting pads 55 and 56. On both sides of the bearing body 53, a projected bearing pivot 54 Respectively. In addition, electric wires that connect the magnetization and element device 30 and the electromagnet 58 'are provided, including a magnetization and element device 30 capable of controlling the electromagnet 58'.

The magnetization and element device 30 can control the electromagnet 8 '. The magnetic force of the electromagnet 8 'can be adjusted to the predetermined conditions in the magnetization and element device 30. [ For example, the vibration applied to the electromagnet 8 'is sensed, and when the frequency per hour exceeds a predetermined amount, the magnetic force can be increased.

An oil nozzle 87 may be installed at one end of both sides of the bearing main body 53 provided with the respective tilting pads 55, 56. The first oil nozzle 87 and the second oil nozzle 88 are connected to the first control valve 85 and the second control valve 86 so that they can inject oil according to the direction in which thrust acts. 7, the thrust is generated in the direction in which the first tilting pad 55 is located on the side where the second tilting pad 56 is located. A friction force is generated between the second tilting pad 56 and the rotating object so that the second control valve 86 operates to lubricate the second tilting pad 56 and the second tilting pad 56 through the second oil nozzle 88. [ Oil is sprayed. If the rotation is reversed, the lubricating oil must be supplied to the first tilting pad 55, so that the first control valve 85 is operated to supply oil to the first tilting pad 56 through the first oil nozzle 87 .

In this case also, the height adjusting padding 80 can be interposed between the magnet 58 and the bearing main body 53. The height adjustment shim 80 is coupled to the bearing body 53, and the magnet 58 can also be coupled thereto. Therefore, when the magnet is damaged due to long-term use or when the height of the magnet is to be adjusted, only the height adjusting shim 80 is replaced and maintenance can be easily performed.

In this embodiment, the height adjusting padding 80 is mounted on each of both sides of the bearing body 53 in a fine groove, and the electromagnet 58 'can be mounted on the height adjusting padding 80. The groove is formed adjacent to the bearing pivot 54.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the invention.

1: Upper bearing housing
2: Lower bearing housing
3: Rotating body
4: Bearing pivot
5: Lower pad
6: upper pad
7: magnet mounting portion
8: Magnet
8 ': Electromagnet
8a, 8a ': first surface
8b, 8b ': the second surface
53: bearing body
54: Bearing pivot
55: first tilting pad
56: 2nd tilting pad
58: Magnet
80: Height adjustment core
85: first control valve
86: Second control valve
87: First oil nozzle
88: Second oil nozzle

Claims (17)

A housing including an upper housing and a lower housing;
A bearing pivot mounted within the housing; And
At least one tilting pad positioned to be movable on the bearing pivot,
Wherein a magnet is installed between the at least one tilting pad and the housing.
The method according to claim 1,
Wherein the at least one tilting pad comprises a top pad and a bottom pad.
3. The method of claim 2,
Further comprising a magnet mounting portion detachably mounted to the housing,
Wherein the magnet is mounted on the magnet mounting portion.
The method of claim 3,
Wherein the magnet is installed between the upper pad and the upper housing.
5. The method of claim 4,
And a height adjustment shim releasable between the magnet and the magnet mounting portion.
6. The method of claim 5,
Wherein the magnet comprises a first surface capable of contacting the tilting pad and a second surface facing the magnet mount.
The method according to claim 6,
Wherein the tilting pad comprises a first half and a second half in a linear symmetry relationship with the first half,
Wherein the first surface of the magnet is in contact with the first half or second half of the tilting pad.
8. The method of claim 7,
Wherein at least a portion of the first surface of the magnet coincides with the outer surface of the tilting pad.
9. The method of claim 8,
Wherein a point of the first surface of the magnet closest to the origin of the circular cross-section of the housing is farther from the origin than the point at which the upper tilting pad contacts the bearing pivot.
10. The method according to any one of claims 1 to 9,
Wherein the magnet is an electromagnet.
11. The method of claim 10,
Further comprising a magnetization and element device capable of controlling the magnetic force of the electromagnet.
12. The method of claim 11,
Wherein the magnetization and element device is capable of sensing the vibration applied to the electromagnet and controlling the magnetic force according to predetermined conditions.
Bearing body;
Bearing pivots formed on both sides of the bearing body; And
A tilting pad positioned to be movable on the bearing pivot,
Wherein a magnet is provided between the tilting pad and the bearing body.
14. The method of claim 13,
And a height adjustment shim releasable between the magnet and the bearing body.
The method according to claim 13 or 14,
Wherein the magnet is an electromagnet.
16. The method of claim 15,
And a magnetization and element device capable of controlling the magnetic force of the electromagnet.
17. The method of claim 16,
Wherein said magnetization and element device is capable of sensing vibration applied to said electromagnet and controlling magnetic force according to predetermined conditions.

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