WO2009150861A1 - フォイル軸受 - Google Patents
フォイル軸受 Download PDFInfo
- Publication number
- WO2009150861A1 WO2009150861A1 PCT/JP2009/050802 JP2009050802W WO2009150861A1 WO 2009150861 A1 WO2009150861 A1 WO 2009150861A1 JP 2009050802 W JP2009050802 W JP 2009050802W WO 2009150861 A1 WO2009150861 A1 WO 2009150861A1
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- WIPO (PCT)
- Prior art keywords
- foil
- bearing
- support portion
- rotating shaft
- outer ring
- Prior art date
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Classifications
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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
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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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
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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
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/042—Sliding-contact bearings for exclusively rotary movement for axial load only with flexible leaves to create hydrodynamic wedge, e.g. axial foil bearings
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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
- F16C2360/00—Engines or pumps
Definitions
- the present invention includes a thin film foil disposed on the outer periphery of a rotating shaft and an outer ring disposed on the outer periphery of the foil, and forms a fluid lubricating film between the rotating rotating shaft and the foil.
- the present invention relates to a foil bearing that rotatably supports a rotating shaft.
- a foil bearing uses an ambient gas (for example, air) as a working fluid, oil is not supplied and a rotating shaft that rotates at high speed can be supported. It is used for micro gas turbines.
- ambient gas for example, air
- the conventional foil bearing is disclosed by the unpublished patent of patent document 1, for example.
- a technique related to the present invention is disclosed in Patent Document 2.
- the foil bearing is also applied to a thrust bearing that supports the thrust direction of a rotating shaft that rotates at high speed (for example, Non-Patent Document 1).
- Patent Document 1 As shown in FIG. 1, a rotating shaft 51, a foil 52 wound around the outer periphery of the rotating shaft 51 and an outer ring 53 provided on the outer periphery of the foil 52 are provided. A pair of stoppers 54 are provided at both ends of the outer ring 53 so that the foil 52 does not protrude in the axial direction.
- the foil 52 is composed of a top foil on the inner peripheral side 52a and a back foil on the outer peripheral side 52b.
- a back foil conventionally, a bump foil obtained by forming a thin plate into a corrugated shape as shown in FIG. 2 is used. Has been. Further, the top foil 52a and the bump foil 52b have one end fixed to the outer ring 53 and the other end being a free end in order to prevent falling off.
- Patent Document 2 uses a plurality of spring foils to stabilize the shaft vibration.
- an object of the present invention is to provide a foil bearing that can support a rotating shaft with a fluid lubricating film and can elastically support the rotating shaft with the same or arbitrary stiffness distribution and damping characteristics. .
- a foil bearing that supports a cylindrical rotary shaft, and includes a hollow cylindrical outer ring that is supported by a fixed support surface and surrounds the rotary shaft at a predetermined interval, and an outer surface of the rotary shaft.
- a thin film-like top foil whose one end in the circumferential direction is fixed to the inner surface of the outer ring, and a back foil made of a thin film that is sandwiched between the top foil and the inner surface of the outer ring and elastically supports the top foil.
- a foil bearing comprising: a support portion that contacts the inner surface of the outer ring and does not move in the circumferential direction; and an elastic portion that is supported by the support portion and elastically bends in a radial direction by a surface pressure from a back foil.
- the back foil is formed of a thin plate in which a support portion and an elastic portion are integrated, and the elastic portion is bent inward from the support portion and folded back at an inner end. Consists of multiple folds back.
- the back foil is formed of a thin plate in which a support portion and an elastic portion are integrated, and the elastic portion is bent inward from the support portion and folded back at an inner end. It consists of a plurality of folds to return, and the inner end is separated while keeping the folds connected. The heights and / or angles of the plurality of folds are different depending on the same or circumferential position.
- the back foil comprises two or more foil plates combined in a double or more manner.
- Each foil plate is made of an integral thin plate, and is made up of a plurality of folds, a part of which is folded inwardly or outwardly and folded in the middle.
- a bearing that supports a cylindrical rotary shaft, and a back foil that is formed of a thin film that is sandwiched between an outer peripheral surface of the bearing and a fixed support surface and elastically supports the outer peripheral surface of the bearing.
- a foil bearing is provided.
- a foil bearing for supporting a thrust surface orthogonal to the rotation axis, A fixed support plate having a support surface facing the thrust surface; A thin film-like top foil having one circumferential end fixed to a fixed support plate; A back foil made of a thin film sandwiched between the top foil and the fixed support plate and elastically supporting the top foil; The back foil includes a support portion that contacts the fixed support plate and does not move in the circumferential direction, and an elastic portion that is supported by the support portion and elastically bends in the thrust direction due to surface pressure from the back foil.
- a foil bearing is provided.
- the thin film-like top foil surrounds the outer surface of the rotating shaft and one end in the circumferential direction is fixed to the inner surface of the outer ring, a fluid lubricating film is formed between the top foil and the shaft when the shaft rotates.
- the rotating shaft can be supported by a fluid lubricating film.
- the back foil is composed of a support portion and an elastic portion, the support portion contacts the inner surface of the outer ring and does not move in the circumferential direction, and the elastic portion is supported by the support portion and elastically in the radial direction by the surface pressure from the back foil.
- the elastic portion Since it bends, it can be elastically supported with the same stiffness distribution and damping characteristics in the entire circumferential direction by forming the elastic portion uniformly in the circumferential direction, or the elastic portion can be arbitrarily rigid distribution and damping in the circumferential direction. By making it a characteristic, it can be elastically supported with an arbitrary distribution.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG. It is a schematic diagram of the conventional back foil.
- 1 is a first embodiment of a foil bearing according to the present invention. It is a figure which shows 1st Embodiment of the back foil 3b. It is a support rigidity analysis figure for one fold of the back foil of the present invention. It is a slip amount analysis figure of the fold of the back foil of this invention. It is a figure which shows the shaping
- FIG. 4 is a diagram showing a first embodiment of a foil bearing according to the present invention.
- a foil bearing 1 ⁇ / b> A of the present invention includes a hollow cylindrical outer ring 4, a thin film top foil 3 a, and a thin film back foil 3 b, and supports the rotating shaft 2.
- the hollow cylindrical outer ring 4 is supported by a fixed support surface (not shown), and surrounds the rotary shaft 2 with a certain interval.
- the thin film-like top foil 3a surrounds the outer peripheral surface 2a of the rotating shaft, and one end in the circumferential direction is fixed to the inner surface of the outer ring.
- the back foil 3b made of a thin film is sandwiched between the top foil 3a and the inner surface of the outer ring, and elastically supports the top foil 3a.
- the foil bearing 1 ⁇ / b> A includes a rotating shaft 2 that is rotated at high speed by a driving unit (not shown), and a foil 3 (a top foil 3 a and a back foil 3 b) disposed on the outer periphery of the rotating shaft, An outer ring 4 provided on the outer periphery of the foil is provided.
- the back foil 3b is a metal thin film, and includes a support portion that contacts the inner surface of the outer ring and does not move in the circumferential direction, and an elastic portion that is supported by the support portion and elastically bends in the radial direction by the surface pressure from the top foil 3a.
- the outer ring 4 is cylindrical, and one end of the top foil 3a and the back foil 3b is fixed to the inner peripheral surface thereof, and the inner peripheral surface and the outer peripheral side of the back foil 3b are in contact with each other.
- the outer ring 4 is supported, for example, by a clearance fit, for example, in a housing (not shown) on the fixed side with respect to the rotating shaft 2 and by a pin or the like (not shown) so as not to rotate.
- FIG. 5 is a diagram showing a first embodiment of the back foil 3b.
- the back foil 3b is formed of a thin plate in which a support portion and an elastic portion are integrated.
- the elastic portion is formed of a plurality of folds that are bent obliquely inward (upward in the drawing) from the support portion, folded back at the inner end (vertex), and returned to the support portion.
- FIG. 6 is a support rigidity analysis diagram for one fold of the back foil of the present invention
- FIG. 7 is an analysis diagram of the slip amount of the fold of the back foil of the present invention.
- the support rigidity k for one fold is expressed by the following equation (1).
- the slip amount s of the fold can be obtained from the geometric calculation as shown in Equation (2).
- t plate thickness of the back foil
- b width of the back foil (length in the bearing length direction)
- E longitudinal elastic modulus of the back foil material
- l length of the fold
- ⁇ indentation by the top foil Amount (displacement amount in the bearing radial direction)
- ⁇ an angle formed between the pleat and the bearing radial direction.
- FIG. 8 is a view showing a back foil molding method of the present invention.
- This figure shows an example of the forming method of the pleated back foil 3b, showing a forming method of forming a crease from a thin film and further bending the crease. Since it can be formed from a single thin film, the manufacturing cost is reduced. Can be suppressed. That is, as shown in this figure, a back foil can be easily formed by forming a plurality of creases in intermediate molding of one thin plate and inclining each crease in the final molding. Note that the heights and / or angles of the plurality of folds may be the same or different depending on the circumferential position.
- a fluid lubrication film is formed between the rotating shaft 2 and the foil bearing 1A supports the rotating shaft 2 rotatably.
- the deformation (bending deformation) of the adjacent folds of the fold-like back foil 3b is not accompanied by the change in pitch dimension as seen when the bump foil is deformed, and the folds can be deformed independently of each other.
- the amount of the slip can be quantified as described above, so that the vibration damping effect due to the sliding friction can be easily predicted.
- FIG. 9 is a second embodiment of a foil bearing according to the present invention.
- the back foil is made of a thin plate in which the support portion and the elastic portion are integrated, and the elastic portion is made of a plurality of folds that are bent inward from the support portion, folded back at the inner end, and returned to the support portion. The ends are cut off while keeping the folds connected.
- the fold portion separated from the support portion by the inner end being cut off is received by the fold portion integrated with the support portion (inverted U-shaped portion in FIG. 9). It is held between the part and the top foil. Thereby, the inner end is cut off while maintaining the connection of the folds. As shown in this figure, if the top of the fold is cut off while keeping the folds connected, slippage at the mating surface of the folds will also occur, so a higher vibration damping effect can be expected.
- FIGS. 10A, 10B, and 10C are views of a third embodiment of a foil bearing according to the present invention.
- the back foil is composed of two or more foil plates combined in a double or more manner.
- Each foil plate is made of an integral thin plate, and is made up of a plurality of folds, a part of which is folded inward or outward and folded back in the middle.
- the effect of enhancing the vibration damping effect can be expected by combining a plurality of pleated back foils.
- FIG. 11 is a fourth embodiment of a foil bearing according to the present invention.
- the foil of the first embodiment that is, only the top foil 3a and the back foil 3b or the back foil 3b may be used
- This configuration is applicable not only to the foil bearing of the first embodiment but also to a conventional bearing. That is, the bearing that supports the rotating shaft is the foil bearing (first embodiment) of the present invention in this example, but may be a conventional general bearing.
- the foil provided between the foil bearing of the present invention and the existing bearing housing is not limited to the foil of the first embodiment (that is, the top foil 3a and the back foil 3b or only the back foil 3b may be used).
- the back foil is made of a thin film, it may be a pleated shape or a conventional bump foil. That is, the thin film back foil or top foil 3a and back foil 3b are sandwiched between the outer peripheral surface of the bearing supporting the cylindrical rotating shaft and the fixed support surface provided in the existing bearing housing or the like. Thus, the outer peripheral surface of the bearing may be elastically supported by the back foil or the top foil 3a and the back foil 3b.
- one end of the top foil 3a and the back foil 3b may be fixed to the fixed support surface that extends radially inward of the rotation shaft and extends in the circumferential direction.
- the fixed support surface performs the same function as the inner surface of the outer ring.
- the foil bearing of the present invention is not limited to a radial bearing, and can be applied to a thrust bearing.
- the foil bearing of the present invention is a thrust foil bearing that supports a thrust surface that is orthogonal to the rotating shaft and provided on the rotating shaft, and the fixed support plate has a supporting surface that faces the thrust surface, One end in the circumferential direction of the top foil is fixed to the fixed support plate. Further, a back foil made of a thin film is sandwiched between the top foil and the fixed support plate and elastically supports the top foil.
- the back foil is elastically bent in the thrust direction (that is, the axial direction of the rotating shaft) by a support portion that contacts the fixed support plate and does not move in the circumferential direction, and is supported by the support portion due to the surface pressure from the back foil. And an elastic portion.
- the vertical direction corresponds to the thrust direction
- the horizontal direction corresponds to the circumferential direction
- the “outer ring” serves as a fixed support plate.
- the support surface of the fixed support plate may have an annular shape in which an opening through which the rotation shaft passes is formed at the center thereof.
- the top foil is disposed so that the top foil extends along the annular support surface.
- a portion that supports and holds the top foil and the back foil in the radial direction from the radially outer side and the inner side of the rotating shaft may be provided in the stationary member (for example, the fixed support plate).
- the stationary member for example, the fixed support plate.
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Abstract
Description
本発明は、回転軸の外周に配置された薄膜状のフォイルと、このフォイルの外周に配置された外輪とを備え、回転する回転軸とフォイルの間に流体潤滑膜を形成することによって回転軸を回転自在に支持するフォイル軸受に関する。
フォイル軸受は周囲ガス(例えば空気)を作動流体とすることにより、オイルを供給することがなく、しかも、高速回転する回転軸を支持することができるため、ターボ圧縮機、ターボチャージャ、マイクロガスタービン等に使用されている。
さらに、フォイル軸受は、高速回転する回転軸のスラスト方向を支持するスラスト軸受にも適用されている(例えば、非特許文献1)。
また、トップフォイル52aとバンプフォイル52bとは、脱落防止のため一端が外輪53に固定され、他端は自由端となっている。
前記複数のヒダの高さ及び/又は角度は、同一又は周方向位置により異なる。
各フォイル板は、一体の薄板からなり、その一部が内方又は外方に折り曲げられ途中で折り返された複数のヒダからなる。
前記スラスト面に対向する支持面を有する固定支持板と、
周方向一端が固定支持板に固定された薄膜状のトップフォイルと、
該トップフォイルと固定支持板の間に挟持されトップフォイルを弾性的に支持する薄膜からなるバックフォイルとを備え、
該バックフォイルは、固定支持板に接触し周方向に移動しない支持部と、該支持部に支持されバックフォイルからの面圧によりスラスト方向に弾性的に撓む弾性部とを有する、ことを特徴とするフォイル軸受が提供される。
また、バックフォイルが、支持部と弾性部からなり、支持部は外輪内面に接触し周方向に移動せず、弾性部は支持部に支持されバックフォイルからの面圧により半径方向に弾性的に撓むので、弾性部を周方向で均一に形成することにより周方向全体で同一の剛性分布及び減衰特性で弾性的に支持することができ、或いは弾性部を周方向に任意の剛性分布及び減衰特性にすることで任意の分布で弾性的に支持することができる。
中空円筒形の外輪4は、固定支持面(図示せず)で支持され、回転軸2を一定の間隔を隔てて囲む。
薄膜状のトップフォイル3aは、回転軸の外周面2aを囲み周方向一端が外輪内面に固定されている。
薄膜からなるバックフォイル3bは、トップフォイル3aと外輪内面の間に挟持され、トップフォイル3aを弾性的に支持する。
この図において、バックフォイル3bは、支持部と弾性部が一体の薄板からなる。また、弾性部は支持部から内方(図で上方)に斜めに折り曲げられ、内方端(頂点)で折り返され支持部に戻る複数のヒダからなる。
図6に示すように、ヒダを梁とみなせば、ヒダ1個分の支持剛性kは、数1の式(1)のように表される。
またヒダのすべり量sは図7に示すように幾何計算から数1の式(2)のように得ることができる。
この図は、ヒダ状のバックフォイル3bの成形方法例を示したものであり、薄膜からヒダを成形し、さらにヒダを折り曲げる成形方法を示しており、一枚の薄膜から成形できるため製造コストを抑制できる。
すなわちこの図に示すように、1枚の薄板を中間成形において、複数のヒダを形成し、最終成形で各ヒダを傾斜させることで、容易にバックフォイルを成形することができる。
なお複数のヒダの高さ及び/又は角度は、同一であっても、或いは周方向位置により異なってもよい。
ヒダ状のバックフォイル3bの隣り合ったヒダの変形(折曲げ変形)はバンプフォイルが変形する際に見られるようなピッチ寸法の変化を伴わず、ヒダ同士が互いに独立に変形できるため、トップフォイルを周方向全体で同一の剛性分布で弾性的に支持することも、或いは弾性部を周方向に任意の剛性分布にすることで任意の分布で弾性的に支持することもできる。また、ヒダの変形に伴い、トップフォイルとの間にはすべりが生じるが、そのすべり量は前述のように定量化できるため、すべり摩擦による振動減衰効果も予測し易くなる。
この例において、バックフォイルは、支持部と弾性部が一体の薄板からなり、弾性部は支持部から内方に折り曲げられ内方端で折り返えされ支持部に戻る複数のヒダからなり、内方端は、ヒダの連結を保ちつつ切り離なされている。内方端が切り離されることにより支持部から分離したヒダ部分は、支持部と一体となっているヒダ部分(図9における逆ハの字部分)に受けられ、逆ハの字部分である該ヒダ部分とトップフォイルとの間に保持される。これにより、内方端は、ヒダの連結を保ちつつ切り離なされている。
この図に示すように、ヒダの連結を保ちつつヒダ頂部を切り離せばヒダの合わせ面におけるすべりも生じるため、より高い振動減衰効果が期待できる。
この例において、バックフォイルは、二重以上に組み合わされた2枚以上のフォイル板からなる。各フォイル板は、一体の薄板からなり、その一部が内方又は外方に折り曲げられ途中で折り返えされた複数のヒダからなる。
このように、ヒダ状のバックフォイルを複数組み合わせることにより、振動減衰効果を高める効果が期待できる。
この例では、本発明のフォイル軸受と既存の軸受ハウジングとの間に例えば第1実施形態のフォイル(即ち、トップフォイル3aとバックフォイル3b、またはバックフォイル3bのみでも良い)を取り付けた状態を示すものであり、より高い振動減衰効果が期待できる。
なお、この構成は第1実施形態のフォイル軸受だけでなく、従来型軸受にも適用可能である。すなわち、回転軸を支持する軸受は、この例では本発明のフォイル軸受(第1実施形態)であるが、従来の一般的な軸受であってもよい。また、本発明のフォイル軸受と既存の軸受ハウジングとの間に設けられるフォイルは、第1実施形態のフォイル(即ち、トップフォイル3aとバックフォイル3b、またはバックフォイル3bのみでも良い)に限定されず、薄膜からなるバックフォイルであれば、ヒダ形状でも、従来タイプのバンプフォイルでもよい。即ち、薄膜からなるバックフォイルまたはトップフォイル3aとバックフォイル3bを、円筒形の回転軸を支持する前記軸受の外周面と、既存の軸受ハウジング等に設けられた固定支持面との間に挟持することで、該バックフォイルまたはトップフォイル3aとバックフォイル3bにより該軸受の外周面を弾性的に支持するようにしてよい。トップフォイル3aとバックフォイル3bを用いる場合には、トップフォイル3aとバックフォイル3bは、その周方向一端が、回転軸の半径方向内方を向き周方向に延びる前記固定支持面に固定されてよい。この場合、前記固定支持面は、前記外輪内面と同じ機能を果たす。
この構成により、既に従来型軸受を搭載済みの場合でもハウジングを追加工するだけで設置が可能である。
その他の構成は、第1実施形態のフォイル軸受と同様である。
Claims (7)
- 円筒形の回転軸を支持するフォイル軸受であって、
固定支持面で支持され前記回転軸を一定の間隔を隔てて囲む中空円筒形の外輪と、
前記回転軸の外面を囲み周方向一端が外輪内面に固定された薄膜状のトップフォイルと、
該トップフォイルと外輪内面の間に挟持されトップフォイルを弾性的に支持する薄膜からなるバックフォイルとを備え、
該バックフォイルは、外輪内面に接触し周方向に移動しない支持部と、該支持部に支持されトップフォイルからの面圧により半径方向に弾性的に撓む弾性部とを有する、ことを特徴とするフォイル軸受。 - 前記バックフォイルは、支持部と弾性部が一体の薄板からなり、該弾性部は支持部から内方に折り曲げられ内方端で折り返えされ支持部に戻る複数のヒダからなる、ことを特徴とする請求項1記載のフォイル軸受。
- 前記バックフォイルは、支持部と弾性部が一体の薄板からなり、該弾性部は支持部から内方に折り曲げられ内方端で折り返えされ支持部に戻る複数のヒダからなり、
前記内方端は、ヒダの連結を保ちつつ切り離なされている、ことを特徴とする請求項1に記載のフォイル軸受。 - 前記複数のヒダの高さ及び/又は角度は、同一又は周方向位置により異なる、ことを特徴とする請求項2又は3に記載のフォイル軸受。
- 前記バックフォイルは、二重以上に組み合わされた2枚以上のフォイル板からなり、
各フォイル板は、一体の薄板からなり、その一部が内方又は外方に折り曲げられ途中で折り返えされた複数のヒダからなる、ことを特徴とする請求項1記載のフォイル軸受。 - 円筒形の回転軸を支持する軸受と、該軸受の外周面と固定支持面の間に挟持され軸受の外周面を弾性的に支持する薄膜からなるバックフォイルとを備える、ことを特徴とするフォイル軸受。
- 回転軸に直交するスラスト面を支持するフォイル軸受であって、
前記スラスト面に対向する支持面を有する固定支持板と、
周方向一端が固定支持板に固定された薄膜状のトップフォイルと、
該トップフォイルと固定支持板の間に挟持されトップフォイルを弾性的に支持する薄膜からなるバックフォイルとを備え、
該バックフォイルは、固定支持板に接触し周方向に移動しない支持部と、該支持部に支持されバックフォイルからの面圧によりスラスト方向に弾性的に撓む弾性部とを有する、ことを特徴とするフォイル軸受。
Priority Applications (3)
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EP09762292.2A EP2287479A4 (en) | 2008-06-12 | 2009-01-21 | BEARING-SHEET |
KR1020107027511A KR101293197B1 (ko) | 2008-06-12 | 2009-01-21 | 포일 베어링 |
US12/997,236 US8360645B2 (en) | 2008-06-12 | 2009-01-21 | Foil bearing |
Applications Claiming Priority (2)
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JP2008-153632 | 2008-06-12 | ||
JP2008153632A JP5286955B2 (ja) | 2008-06-12 | 2008-06-12 | フォイル軸受 |
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WO2009150861A1 true WO2009150861A1 (ja) | 2009-12-17 |
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PCT/JP2009/050802 WO2009150861A1 (ja) | 2008-06-12 | 2009-01-21 | フォイル軸受 |
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US (1) | US8360645B2 (ja) |
EP (1) | EP2287479A4 (ja) |
JP (1) | JP5286955B2 (ja) |
KR (1) | KR101293197B1 (ja) |
WO (1) | WO2009150861A1 (ja) |
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Also Published As
Publication number | Publication date |
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EP2287479A4 (en) | 2014-01-22 |
KR101293197B1 (ko) | 2013-08-05 |
JP5286955B2 (ja) | 2013-09-11 |
EP2287479A1 (en) | 2011-02-23 |
KR20110009219A (ko) | 2011-01-27 |
US20110103725A1 (en) | 2011-05-05 |
JP2009299748A (ja) | 2009-12-24 |
US8360645B2 (en) | 2013-01-29 |
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