KR101749892B1 - Air foil journal bearing having a improved housing structure - Google Patents

Air foil journal bearing having a improved housing structure Download PDF

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Publication number
KR101749892B1
KR101749892B1 KR1020150128704A KR20150128704A KR101749892B1 KR 101749892 B1 KR101749892 B1 KR 101749892B1 KR 1020150128704 A KR1020150128704 A KR 1020150128704A KR 20150128704 A KR20150128704 A KR 20150128704A KR 101749892 B1 KR101749892 B1 KR 101749892B1
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KR
South Korea
Prior art keywords
bearing housing
rotor
damping sheet
foil
top foil
Prior art date
Application number
KR1020150128704A
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Korean (ko)
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KR20170031343A (en
Inventor
임재만
이홍영
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주식회사 뉴로스
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Priority to KR1020150128704A priority Critical patent/KR101749892B1/en
Priority to PCT/KR2016/010081 priority patent/WO2017043880A1/en
Publication of KR20170031343A publication Critical patent/KR20170031343A/en
Application granted granted Critical
Publication of KR101749892B1 publication Critical patent/KR101749892B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/024—Sliding-contact bearings for exclusively rotary movement for radial load only with flexible leaves to create hydrodynamic wedge, e.g. radial foil bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/02—Sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/20—Application independent of particular apparatuses related to type of movement
    • F16C2300/22—High-speed rotation

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)

Abstract

The present invention relates to an airfoil journal bearing having an improved housing structure, comprising: a bearing housing formed with a hollow in which a rotor is disposed and open at both sides in a width direction; A bumper foil formed on the inner side of the bearing housing and formed along the circumferential direction and having one side fixed to the bearing housing; And a top foil provided on the inner side of the bump foil and formed along the circumferential direction and having one side fixedly coupled to the bearing housing; Wherein the inner circumferential surface of the bearing housing is formed in a vertically long oval shape or the inner circumferential surface of the bearing housing is formed in a circular shape on the upper side and the lower side is formed in a vertically long oval shape, To an airfoil journal bearing improved in a housing structure capable of being rotated in a state in which the rotation centers of the rotors coincide with each other.

Description

[0001] The present invention relates to an airfoil journal bearing having an improved housing structure,

The present invention relates to an airfoil journal bearing with improved housing structure, and in particular, to an airfoil journal bearing having a bump foil and a top foil inside a bearing housing, wherein the structure of the bearing housing is improved, To an airfoil journal bearing improved in a housing structure capable of rotating the center of rotation of the rotor in a state where the center of rotation is coincident with the center thereof.

The bearing is a mechanical element that fixes the rotating shaft at a fixed position and simultaneously rotates the shaft while supporting the self weight of the shaft and the load applied to the shaft.

The airfoil bearing in the bearing is a bearing that supports the load by introducing air, which is a viscous fluid, between the foil and the foil in contact with the rotor or the bearing disk due to high-speed rotation of the rotor (or rotary shaft) to form a pressure. In addition, an airfoil journal bearing in an airfoil bearing is a bearing configured to support a radial load of the rotor in a direction perpendicular to the rotor.

1, a bump foil 20 is installed along a circumferential inner surface 12 of the hollow 11 of the bearing housing 10, and a bump foil 20 is disposed inside the bump foil 20, A rotor 40 or a rotating shaft is disposed inside the top foil 30 and the rotor 40 is rotated in a state where the inner circumferential surface of the top foil 30 and the outer circumferential surface of the rotor 40 are spaced apart from each other And is configured to be rotated. The bump foil 20 and the top foil 30 are formed with bending portions bent in the radial direction outwardly in the circumferential direction and the bending portions 21 and 31 are formed in the slots 13 formed in the bearing housing 10, So that the bump foil 20 and the top foil 30 are fixed to the bearing housing 10 without being rotated or pushed in the circumferential direction.

Here, when the rotor 40 is rotated, pressure is generated as shown by the air existing between the top foil 30 and the rotor 40, so that the rotor 40 is rotated in the state of being separated from the top foil 30 . That is, when the rotor 40 is stopped, the lower side of the rotor 40 is supported on the top foil 30 by the weight of the rotor 40. When the rotor 40 is rotated, 40 are floating in the top foil 30. At this time, the center of rotation of the rotor 40 does not coincide with the center of the bearing housing 10, and the center of rotation of the rotor 40 is offset from the center of rotation of the bearing housing 10, . More specifically, the center of rotation of the rotor 40 is located below the center of the bearing housing 10, and when the rotor 40 rotates counterclockwise, the center of rotation is biased to the right.

As the rotor 40 is rotated in a state where the rotation center of the rotor 40 does not coincide with the center of the bearing housing 10 and is eccentrically rotated, the rotor 40 is coupled to one side of the rotor 40 There is a problem that the rotation accuracy of the rotating impeller is reduced and the efficiency and performance of the air compressor are deteriorated.

KR 10-1068542 B1 (2011.09.22.)

It is an object of the present invention to provide an airfoil journal bearing in which a bump foil and a top foil are provided inside a bearing housing, The present invention is to provide an airfoil journal bearing improved in its housing structure that can be rotated in a state where the center of rotation of the rotor coincides with the center of the bearing housing during rotation.

According to an aspect of the present invention, there is provided an improved airfoil journal bearing comprising: a bearing housing formed with a cavity in which a rotor is disposed and having both sides opened in a width direction; A bumper foil formed on the inner side of the bearing housing and formed along the circumferential direction and having one side fixed to the bearing housing; And a top foil provided on the inner side of the bump foil and formed along the circumferential direction and having one side fixedly coupled to the bearing housing; And the hollow of the bearing housing is formed into a vertically elongated oval shape.

In addition, the airfoil journal bearing improved in the housing structure of the present invention includes: a bearing housing formed with a hollow in which a rotor is disposed and opened at both sides in the width direction; A bumper foil formed on the inner side of the bearing housing and formed along the circumferential direction and having one side fixed to the bearing housing; And a top foil provided on the inner side of the bump foil and formed along the circumferential direction and having one side fixedly coupled to the bearing housing; Wherein the hollow of the bearing housing is formed in a circular shape on the upper side and the lower side is formed in a vertically long oval shape.

The top foil may include a first top foil and a second top foil disposed inside the first top foil. The top foil may be disposed between the first top foil and the second top foil, And a damping sheet having one side fixed to the bearing housing and fixed thereto.

The damping sheet may include a first damping sheet and a second damping sheet, wherein the first damping sheet and the second damping sheet are disposed such that their lower ends are spaced apart from each other in the circumferential direction.

The bump foil may include a plurality of elastic bumps protruding inwardly. The first damping sheet and the second damping sheet may not have elastic bumps at positions corresponding to the portions where the first damping sheet and the second damping sheet are spaced apart from each other. .

The airfoil journal bearing improved in the housing structure of the present invention can improve the structure of the bearing housing so that the rotation center of the rotor is rotated in the center of the bearing housing when the rotor rotates, The rotational accuracy of the impeller coupled to one side of the rotor and rotated together is improved, thereby improving the efficiency and performance of the air compressor.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing air pressure distribution during rotation of a conventional airfoil journal bearing and rotor. FIG.
FIG. 2 is a graph showing the spacing h between the top foil and the rotor and the pressure distribution p of the air according to the position (angle) of the bearing housing during rotation of the rotor in FIG.
3 and 4 are cross-sectional views showing an airfoil journal bearing with improved housing structure according to a first embodiment and a second embodiment of the present invention;
5 is an exploded perspective view showing an airfoil journal bearing with an improved housing structure according to the present invention.
FIG. 6 is a view showing an airfoil journal bearing having an improved housing structure according to the present invention, in which the gap h between the top foil and the rotor according to the position (angle) of the bearing housing during rotation of the rotor, A graph showing the distribution (p).
7 and 8 are a cross-sectional view and an exploded perspective view showing an embodiment in which the top foil according to the present invention is composed of two sheets and a damping sheet is interposed therebetween.
FIG. 9 is a partially enlarged view showing an embodiment in which the top foil is deformed by the air pressure when the rotor is rotated in FIG. 7; FIG.

Hereinafter, an airfoil journal bearing having an improved housing structure according to the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are sectional views showing an airfoil journal bearing with an improved housing structure according to a first embodiment and a second embodiment of the present invention, and Fig. 5 is a sectional view of the airfoil journal bearing according to the present invention, FIG. 6 is an exploded perspective view of the airfoil journal bearing according to the present invention. FIG. 6 is an exploded perspective view of the airfoil journal bearing according to the present invention, in which the gap h between the top foil and the rotor according to the position (angle) (P) of the air acting on the air.

As shown in the figure, the airfoil journal bearing 1000 having the improved housing structure according to the first embodiment of the present invention includes a hollow housing 120 in which a rotor 120 is disposed, and a bearing housing 100); A bump foil 200 formed on the inner side of the bearing housing 100 and formed along the circumferential direction and having one side fixedly coupled to the bearing housing 100; A top foil 300 formed on the inner side of the bump foil 200 and formed along the circumferential direction and having one side fixedly coupled to the bearing housing 100; And the hollow 120 of the bearing housing 100 may be formed into a vertically elongated oval shape.

First, an airfoil journal bearing 1000 having an improved housing structure according to the first embodiment of the present invention can largely include a bearing housing 100, a bump foil 200, and a top foil 300. At this time, the bump foil 200 and the top foil 300 are arranged in a curled form inside the hollow of the bearing housing 100, and the top foil 300 can be disposed inside the bump foil 200. And the rotor 400 may be inserted into the top foil 300 so as to penetrate through the inside thereof. At this time, the rotor 400 may be disposed inside the top foil 300 with a rotating shaft portion.

The bump foil 200 is disposed in a circumferential direction in close contact with the inner circumferential surface of the hollow 110 of the bearing housing 100. The bump foil 200 is formed in a thin plate shape and has a plurality of protruding inwardly convex portions Elastic bumps 201 may be formed. Further, the top foil 300 may be formed as a thin flat plate and adhere to the elastic bumps 201.

A slot 120 may be formed in the bearing housing 100 and a slot 120 may be formed in the width direction of the bearing housing 100 so as to communicate with the hollow 110. At this time, the bump foil 200 may be formed such that the bending portion 210 having the circumferential end bent radially outwardly is formed, and the bending portion 210 can be inserted and disposed in the slot 120. Also, the top foil 300 may be formed so that the bent portion 310 having the circumferential end bent radially outwardly is formed, so that the bent portion 310 can be inserted and disposed in the slot 120. The bending portion 210 of the bump foil 200 and the bending portion 310 of the top foil 300 are inserted into the slot 120 of the bearing housing 100 and are coupled to each other to thereby bond the bump foil 200 and the top foil 300 Can be fixed to the bearing housing 100. Alternatively, the bump foil 200 and the top foil 300 may be coupled and fixed to the bearing housing 100 by welding, or may be coupled and fixed in various other ways.

Here, the hollow of the bearing housing 100 may have a vertically elongated oval shape as shown in FIG. That is, the hollow 120 of the bearing housing 100 is formed in an oval shape instead of a circular shape, and may be formed in a vertically long oval shape in which the major axis of the ellipse is arranged in the vertical direction. Accordingly, the elliptical hollow 120 may have a short axis in the horizontal direction and a long axis in the vertical direction.

Thus, when the rotor 400 rotates inside the bearing housing 100 formed with the longitudinally long elliptical hollow 120 as described above, unlike the pressure distribution acting on the rotor in the bearing housing having the conventional circular hollow A pressure distribution p such as 6 is formed and the distance h between the rotor and the top foil is also shown as shown. That is, the structure of the bearing housing 100 may be changed so that the center RC of the rotor 400 coincides with the center HC of the bearing housing 100. The center RC of the rotor 400 in the horizontal direction coincides with the center HC of the bearing housing 100 and the center HC of the bearing housing 100 and the rotor 400 may be located at the center of the rotor 100. However, due to the structural characteristics of the bearing housing 100 having the longitudinal oval hollow 120 and the weight acting on the rotor 400, There may be a distance difference? H between the center RC of the bearing housing 100 and the center HC of the bearing housing 100.

The airfoil journal bearing improved in the housing structure of the present invention can improve the structure of the bearing housing so that the rotation center of the rotor coincides with the center of the bearing housing when the rotor rotates, The rotation accuracy of the impeller coupled to one side of the rotor is improved when the compressor is used, thereby improving the efficiency and performance of the air compressor.

In the airfoil journal bearing 1000 having the improved housing structure according to the second embodiment of the present invention, a bearing housing 100 in which a hollow 120 in which a rotor is disposed is formed and both sides in the width direction are opened is formed; A bump foil 200 formed on the inner side of the bearing housing 100 and formed along the circumferential direction and having one side fixedly coupled to the bearing housing 100; A top foil 300 formed on the inner side of the bump foil 200 and formed along the circumferential direction and having one side fixedly coupled to the bearing housing 100; The hollow 120 of the bearing housing 100 may have a circular shape on the upper side and a long oval shape on the lower side.

This is the same as the basic form of the bearing housing 100 in the first embodiment described above, except that the bump foil 200 and the top foil 300 are formed differently from the hollow 120 of the bearing housing 100. For example, as shown in FIG. 5, a hollow 120 may be formed in a circular shape on the upper side of the horizontal center line LH of the bearing housing 100, and a lower oval may be formed on the lower side.

6 is formed and the distance h between the rotor and the top foil is also shown as shown in the figure so that the center RC of the rotor 400 is located at the center of the bearing housing 100 And can be made to coincide with the center HC. At this time, the center RC of the rotor 400 in the horizontal direction can be aligned with the center HC of the bearing housing 100, but the bearing housing 100 having the longitudinal oval hollow 120, There may be a height difference between the center RC of the rotor 400 and the center HC of the bearing housing 100 in the vertical direction due to the structural characteristics of the rotor 400 and the self weight acting on the rotor 400. [

In the first and second embodiments, the major axis of the ellipse may be arranged in the vertical direction. However, the major axis of the ellipse may be slightly rotated clockwise or counterclockwise with respect to the vertical direction of the bearing housing 100 As shown in FIG.

The top foil 300 includes a first top foil 300a and a second top foil 300b disposed inside the first top foil 300a. And a damping sheet 500 formed between the second top foils 300b and formed along the circumferential direction and having one side fixed to the bearing housing 100 by being coupled thereto.

That is, as shown in FIGS. 7 and 8, the top foil 300 may be formed in two sheets, and the damping sheet 500 may be interposed therebetween so as to be in close contact with the top foil 300. In order from the radially outer side to the inner side, The foil 300a, the damping sheet 500, and the second top foil 300b may be stacked. Thus, the damping sheet 500 can absorb the vibration generated during the initial rotation and the stopping of the rotor 400 between the two top foils and the vibration generated during the rotation of the rotor 400.

The damping sheet 500 includes a first damping sheet 500a and a second damping sheet 500b. The first damping sheet 500a and the second damping sheet 500b have a lower end, As shown in FIG.

That is, the damping sheet 500 may not be formed continuously along the circumferential direction but may be formed in two pieces. The damping sheet 500 may be divided into two parts, that is, a first damping sheet 500a and a second damping sheet 500b, And the lower end of the damping sheet may be arranged to be spaced apart from each other in the circumferential direction. Thus, the bearing housing 100 can be formed without a damping sheet in the vertical lower portion at the center thereof. The bending portions 510a and 510b are formed by bending the upper ends of the damping sheets in the radial outward direction so that the bending portions 510a and 510b are inserted into the slots 120 of the bearing housing 100 And can be fixed.

Accordingly, when the rotor 400 is rotated as shown in the drawing, the shape of the second top foil 300b (inner space) is changed while the second top foil 300b is pressed by the pressure of the air and deformed radially outward. Thus, the pressure distribution acting on the rotor 400 is changed, so that the center of the rotor 400 can be more accurately aligned with the center of the bearing housing 100 when the rotor 400 rotates.

The bump foil 200 includes a plurality of elastic bumps 201 protruding inwardly. The first damping sheet 500a and the second damping sheet 500b are spaced apart from each other The elastic bump 201 may not be formed at the corresponding position.

This is because the bump foil 200 is formed of the flat plate portion 220 in the flat shape without the elastic bumps 201 at positions corresponding to the portions where the first damping sheet 500a and the second damping sheet 500b are spaced apart from each other The first and second top foils 300a and 300b are easily deformed into a concave downward state by the pressure of the air when the rotor 400 rotates, The center of the rotor 400 can be more accurately aligned with the center of the bearing housing 100 when the rotor 400 rotates.

At this time, the elastic bumps 201 in the bump foil 200 may be formed in a single shape or in a shape without a plurality of continuous bumps. When the rotor 400 is rotated as shown in FIG. 9, the second top foil 300b can be pressed and deformed radially outward due to the pressure of the air. Although not shown, the first top foil 300a is deformed The second top foil 300b may also be deformed or deformed toward the flat plate portion 220 without the elastic bumps 201 or may be closely contacted with the two top foils 300b.

The bump foil 200, the top foil 300, and the damping sheet 500 may be formed in a flattened shape and inserted into the interior of the bearing housing 100 in a dried state. In addition, the bump foil 200, the first top foil 300a, and the second top foil 300b may be formed by overlapping two or more sheets. The bump foil 200 and the top foil 300 may be arranged in the same direction with respect to the respective bending portions 210 and 310 and may be disposed in the bearing housing 100 As shown in FIG.

Even when the top foil 300 is one and the damping sheet 500 is not provided, the bump foil 200 may be formed with a flat plate portion 220 having no elastic bump 201 at a position near the bottom of the bearing housing, have.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1000: Airfoil journal bearings
100: Bearing housing
110: Hollow 120: Slot
LH: Horizontal direction center line LV: Vertical direction center line
HC: Bearing housing center
200: bump foil 201: elastic bump
210: bent portion 220: flat plate portion
300: Top foil
310:
300a: first top foil 300b: second top foil
310a: bent portion 310b: bent portion
400: rotor (rotating shaft)
RC: Rotor center
500: Damping sheet
510:
500a: first damping sheet 500b: second damping sheet
510a: bent portion 510b: bent portion

Claims (5)

A bearing housing in which a hollow in which a rotor is disposed is formed, both sides in the width direction are opened, and an inner circumferential surface is formed in a vertically long oval shape;
A bumper foil formed on the inner side of the bearing housing and formed along the circumferential direction and having one side fixed to the bearing housing; And
A top foil provided on the inner side of the bump foil and formed along the circumferential direction and having one side fixed to the bearing housing; , ≪ / RTI >
Wherein the top foil comprises a first top foil and a second top foil disposed inside the first top foil,
Further comprising a damping sheet disposed between the first and second top foils and formed in the circumferential direction and having one side fixedly coupled to the bearing housing,
Wherein the damping sheet includes a first damping sheet and a second damping sheet, the first damping sheet and the second damping sheet each having an upper end coupled to the bearing housing and each lower end positioned below the rotor And are spaced apart from each other in the circumferential direction.
A bearing housing in which a hollow in which a rotor is disposed is formed, both sides in the width direction are opened, an inner circumferential surface is formed in a circular shape on the upper side, and a lower side is formed in a vertically long oval shape;
A bumper foil formed on the inner side of the bearing housing and formed along the circumferential direction and having one side fixed to the bearing housing; And
A top foil provided on the inner side of the bump foil and formed along the circumferential direction and having one side fixed to the bearing housing; , ≪ / RTI >
Wherein the top foil comprises a first top foil and a second top foil disposed inside the first top foil,
Further comprising a damping sheet disposed between the first and second top foils and formed in the circumferential direction and having one side fixedly coupled to the bearing housing,
Wherein the damping sheet includes a first damping sheet and a second damping sheet, the first damping sheet and the second damping sheet each having an upper end coupled to the bearing housing and each lower end positioned below the rotor And are spaced apart from each other in the circumferential direction.
delete delete 3. The method according to claim 1 or 2,
Wherein the bump foil comprises a plurality of elastic bumps projecting inwardly convexly,
Wherein an elastic bump is not formed at a position corresponding to a portion where the first damping sheet and the second damping sheet are spaced apart from each other.
KR1020150128704A 2015-09-11 2015-09-11 Air foil journal bearing having a improved housing structure KR101749892B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150128704A KR101749892B1 (en) 2015-09-11 2015-09-11 Air foil journal bearing having a improved housing structure
PCT/KR2016/010081 WO2017043880A1 (en) 2015-09-11 2016-09-08 Air foil journal bearing having improved housing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150128704A KR101749892B1 (en) 2015-09-11 2015-09-11 Air foil journal bearing having a improved housing structure

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Publication Number Publication Date
KR20170031343A KR20170031343A (en) 2017-03-21
KR101749892B1 true KR101749892B1 (en) 2017-06-26

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WO (1) WO2017043880A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101785291B1 (en) * 2016-01-26 2017-10-17 주식회사 뉴로스 Air foil journal bearing having a improved top foil structure
KR102097347B1 (en) * 2019-07-16 2020-04-06 주식회사 뉴로스 Air foil journal bearing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002372042A (en) * 2001-06-12 2002-12-26 Honda Motor Co Ltd Foil-type fluid bearing
JP2003021137A (en) * 2001-07-05 2003-01-24 Toshiba Corp Foil type gas bearing
KR101068542B1 (en) * 2009-08-31 2011-09-28 주식회사 뉴로스 Journal foil air bearing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100948905B1 (en) * 2008-01-03 2010-03-24 한국터보기계(주) Long life foil bearing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002372042A (en) * 2001-06-12 2002-12-26 Honda Motor Co Ltd Foil-type fluid bearing
JP2003021137A (en) * 2001-07-05 2003-01-24 Toshiba Corp Foil type gas bearing
KR101068542B1 (en) * 2009-08-31 2011-09-28 주식회사 뉴로스 Journal foil air bearing

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KR20170031343A (en) 2017-03-21
WO2017043880A1 (en) 2017-03-16

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