WO2019004278A1 - ラジアルフォイル軸受 - Google Patents
ラジアルフォイル軸受 Download PDFInfo
- Publication number
- WO2019004278A1 WO2019004278A1 PCT/JP2018/024343 JP2018024343W WO2019004278A1 WO 2019004278 A1 WO2019004278 A1 WO 2019004278A1 JP 2018024343 W JP2018024343 W JP 2018024343W WO 2019004278 A1 WO2019004278 A1 WO 2019004278A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- foil
- notch
- insertion hole
- radial
- engagement member
- Prior art date
Links
Images
Classifications
-
- 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
- F16C43/00—Assembling bearings
- F16C43/02—Assembling 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
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
- F16C2226/70—Positive connections with complementary interlocking parts
- F16C2226/76—Positive connections with complementary interlocking parts with tongue and groove or key and slot
-
- 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
- F16C2360/23—Gas turbine engines
-
- 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
Definitions
- radial foil bearings that are used around a rotating shaft are known as bearings for high-speed rotating bodies.
- a radial foil bearing a thin plate top foil forming a bearing surface, a back foil resiliently supporting the top foil, and a cylindrical housing accommodating the top foil and the back foil are provided.
- the configuration provided is well known.
- a back foil of the radial foil bearing for example, a bump foil obtained by forming a thin plate into a corrugated plate shape is used.
- welding spot welding
- the use of welding may deform the back foil and the bearing housing.
- distortion occurs in the top foil, which affects the load capacity and dynamic characteristics (stiffness and damping performance) of the bearing, and there is a possibility that sufficient support capacity can not be obtained.
- engaging convex portions are provided on both axial end portions of the inner peripheral surface of the housing, and engaging notches are formed on both peripheral edge portions of the back foil. The back foil is prevented from dropping out of the housing by engaging the mating projection and the engagement notch.
- Japanese Unexamined Patent Publication No. 2013-100885 Japanese Patent Application Laid-Open No. 2014-20463 Japanese Patent Application Laid-Open No. 2014-37857 Japanese Patent Publication No. 2010-529390
- the back foil is pressed from above (from the inside in the radial direction) by the top foil when the rotation shaft is inserted into the housing.
- the pressing force is weak, and the engagement notch of the back foil may be disengaged from the engagement convex portion of the housing.
- This indication is made in view of the above-mentioned problem, and aims at controlling drop-off from the housing of back foil.
- a radial foil bearing includes: a housing having an insertion hole; and a notch at an end edge in an axial direction which is disposed on an inner peripheral surface of the insertion hole and extends the insertion hole. And an engaging member attached to the housing in a state of passing through the notch, and extending outside the formation range of the notch in the circumferential direction of the insertion hole on the inner peripheral side of the back foil And.
- the engagement member may extend on both sides in the circumferential direction on the inner peripheral side of the back foil than the formation range of the notch.
- the radial foil bearing according to the aspect of the present disclosure includes an intermediate foil supported by the back foil and provided with a second notch at an end edge in the axial direction, and the engagement member includes the notch and the first foil. It may be attached to the housing in a state where it passes through the second notch, and may extend to the outside of the formation range of the second notch in the circumferential direction of the insertion hole on the inner peripheral side of the intermediate foil.
- an engagement groove extending radially outward from an inner peripheral edge of the insertion hole is provided on an end face in the axial direction of the housing.
- the member may be in contact with the inner surface of the engagement groove.
- the engagement member may be in contact with the inner surface of the engagement groove in a stored state.
- a lid may be provided that is attached to the axial end face of the housing and covers the engagement groove that accommodates the engagement member.
- detachment of the back foil from the bearing housing can be suppressed.
- FIG. 1 is a side view showing an example of a turbomachine to which a radial foil bearing of the present disclosure is applied.
- FIG. 1 is a front view of a radial foil bearing of the present disclosure. It is a front view which shows the state which attached the cover to the radial foil bearing of this indication.
- It is the schematic diagram which expand
- FIG. 1 is a side view showing an example of a turbomachine to which the radial foil bearing of the present disclosure is applied.
- reference numeral 1 is a rotating shaft
- 2 is an impeller provided at one end of the rotating shaft in the axial direction
- 3 is a radial foil bearing according to the present disclosure.
- a radial foil bearing 3 is provided on the rotating shaft 1 so as to surround it. That is, the rotating shaft 1 is inserted into the radial foil bearing 3.
- a thrust collar 4 is provided between the impeller 2 of the rotating shaft 1 and the radial foil bearing 3.
- Thrust bearings 5 are disposed (inserted) on both axial sides of the thrust collar 4.
- the impeller 2 is disposed in the housing 6 on the stationary side, and a tip clearance 7 is provided between the impeller 2 and the housing 6.
- FIG. 2 is a front view showing a radial foil bearing 3 of the present disclosure.
- FIG. 3 is a front view showing a state in which the lid 50 is attached to the radial foil bearing 3 of the present disclosure.
- the radial foil bearing 3 is a bearing which is provided so as to surround the rotating shaft 1 and supports the rotating shaft 1.
- the radial foil bearing 3 comprises a top foil 9, an intermediate foil 10, a back foil 11, and a bearing housing 12 (housing).
- the bearing housing 12 has an insertion hole 12 a through which the rotating shaft 1 is inserted.
- the bearing housing 12 in which the penetration hole 12a of this indication was formed becomes cylindrical shape.
- the positional relationship of each member may be described on the basis of the insertion hole 12a.
- the “axial direction” refers to the direction in which the insertion hole 12 a extends (the direction in which the rotation shaft 1 is inserted).
- the “radial direction” refers to the radial direction of the insertion hole 12a (ie, the direction orthogonal to the central axis of the insertion hole 12a (see the symbol O in FIGS. 2 and 3)).
- the “circumferential direction” refers to the circumferential direction along the inner peripheral surface of the insertion hole 12a (that is, the direction around the central axis of the insertion hole 12a).
- the bearing housing 12 is a cylindrical member which constitutes the outermost part of the radial foil bearing 3 in the radial direction.
- the back foil 11, the intermediate foil 10, and the top foil 9 are accommodated in the insertion hole 12 a of the bearing housing 12. Specifically, the back foil 11 is supported on the inner circumferential surface of the insertion hole 12 a, the intermediate foil 10 is supported on the back foil 11, and the top foil 9 is supported on the intermediate foil 10.
- the bearing housing 12 of the present disclosure is a cylindrical member provided with the insertion hole 12 a. However, as long as it has the insertion hole 12a, the bearing housing 12 may be a member other than cylindrical (for example, a prismatic member).
- FIG. 4 is the schematic diagram which expand
- the top foil 9 is a substantially rectangular metal foil whose long side is in the circumferential direction and whose short side is in the axial direction.
- the top foil 9 is cylindrically wound and disposed so as to face the outer peripheral surface of the rotating shaft 1.
- one convex portion 21a protruding to one side in the long side direction and both short side directions of the convex portion 21a.
- a first concavo-convex portion 23a having the two concave portions 22a formed is formed. That is, one short side in the long side direction of the top foil 9 is provided with one convex portion 21 a protruding in the long side direction and a step difference extending on both sides in the short side direction of the convex portion 21 a.
- the short side located on the other short side opposite to the one short side of the top foil 9 is formed on the other short side opposite to the one short side of the top foil 9 (the short side located on the other side in the long side direction), two convex portions 21 b separated in the short side direction, and the two A second concavo-convex portion 23 b having one concave portion 22 b located between the convex portions 21 b is formed.
- the short side located on the other side in the long side direction of the top foil 9 is provided with a recess 22 b recessed to the one side in the long side direction and a step located on both sides in the short side direction of the recess 22 b.
- the recess 22 b of the second uneven portion 23 b is formed to correspond to the protrusion 21 a of the first uneven portion 23 a. Further, the recess 22 a of the first uneven portion 23 a is formed corresponding to the protrusion 21 b of the second uneven portion 23 b. That is, the minimum value of the distance in the short side direction of the recess 22 b is larger than the maximum value of the width in the short side direction of the protrusion 21 a.
- the interval (depression depth) in the long side direction of the recess 22 b of the present disclosure and the interval (length) in the long side direction of the protrusion 21 a are constant in the long side direction.
- the convex part 21 a passes through the inside of the concavities 22 b of the second concavo-convex part 23 b Is formed.
- the concave portions 22a of the first uneven portion 23a are formed such that the convex portions 21b pass through the concave portions 22a.
- the convex portions 21a, 21b having passed through the concave portions 22b, 22a are respectively drawn out to the bearing housing 12 side (radially outer side) as shown in FIG. That is, when the top foil 9 disposed on the inner peripheral side (that is, the inner side in the radial direction) of the insertion hole 12a is viewed from the axial direction, the convex portion 21a and the convex portion 21b intersect. Moreover, the convex part 21a of the top foil 9 is located between the two convex parts 21b in an axial direction. On the bearing housing 12 side, a first groove 13 is formed on the inner peripheral surface of the insertion hole 12a so as to be continuous with one end surface 12b in the axial direction and the other end surface 12b.
- FIG. 5 is a schematic view of the main part of the first groove 13 of the bearing housing 12 of the present disclosure, where (a) is an exploded perspective view, (b) is a plan view, and (c) is a cross-sectional view.
- second grooves 14 communicating with both ends of the first groove 13 are formed in the bearing housing 12 respectively.
- the second grooves 14 are respectively formed on both end faces 12 b in the axial direction of the bearing housing 12 and extend radially outward from the inner peripheral edge of the bearing housing 12.
- Third grooves 15 are formed in each of the first grooves 13 on the inner surfaces facing each other in the circumferential direction.
- the third groove 15 is formed over the entire length of the first groove 13.
- the cross-sectional shape of the third groove 15 is U-shaped (semicircular arc shape).
- the third groove 15 is formed at an opening end of the first groove 13 in the radial direction, that is, at a position (radially outside) deeper than the inner peripheral surface (insertion hole 12 a) of the bearing housing 12. As shown in FIG. 2, the convex portions 21 a and 21 b passing through the concave portions 22 b and 22 a are inserted into the third groove 15.
- the insertion tool 16 is fitted into the first groove 13 and the second groove 14.
- the insertion tool 16 is formed on a rod-like (square pillar-like) base portion 17 housed in the first groove 13 and the base portion 17 to form a second groove 14.
- two partition pieces 19 which are formed on the base 17 and project on opposite sides in the radial direction.
- the base 17 is accommodated in the first groove 13 in a state in which the upper surface (the surface on the side of the partition wall piece 19) is slightly sunk in the opening of the first groove 13.
- the bent piece 18 is in contact with the bottom surface of the second groove 14 in the axial direction.
- the bent pieces 18 do not protrude from the outer peripheral surface of the bearing housing 12 in the radial direction.
- the bending pieces 18 abut the bearing housing 12 on both sides in the axial direction, thereby suppressing the movement of the fitting 16 in the axial direction.
- the partition pieces 19 are respectively formed at two positions that substantially divide the base 17 into three in the axial direction.
- the partition pieces 19 have the same height as the opening position of the first groove 13 or a height slightly projecting from the opening position of the first groove 13 as shown in FIG. 5C.
- the partition wall piece 19 divides the upper surface of the base portion 17 into three roughly to form three engagement grooves 20 in the axial direction.
- the convex portions 21 a and 21 b into the third groove 15 By inserting the convex portions 21 a and 21 b into the third groove 15, movement (rotation) of the top foil 9 in the circumferential direction is suppressed. That is, both circumferential ends of the top foil 9 abut on the bearing housing 12 or a member attached to the bearing housing 12. As a result, drag acts on both ends of the top foil 9 in the circumferential direction.
- the top foil 9 approaches a wedge shape (a slope along the tangential direction of the cylindrically wound top foil 9) in the insertion hole 12a of the bearing housing 12 as it goes to both ends in the circumferential direction.
- the distance between the top foil 9 and the inner circumferential surface of the insertion hole 12 a is gradually narrowed toward both circumferential ends of the top foil 9.
- the top foil 9 approaches the intermediate foil 10 described below as it approaches both circumferential ends.
- the distance between the top foil 9 and the intermediate foil 10 gradually decreases toward both circumferential ends of the top foil 9.
- the convex portions 21 a and 21 b engage with the engagement grooves 20 to suppress the movement of the top foil 9 in the axial direction.
- first uneven portion 23a and the second uneven portion 23b described above are provided in the top foil 9 in the present embodiment, the present disclosure is not limited to this configuration.
- a first uneven portion and a second uneven portion are provided on both ends in the circumferential direction of the top foil, the first uneven portion includes at least one protruding portion and a recessed portion, and the second uneven portion includes the protruding portion and the recessed portion.
- the convex portion of the first uneven portion is a concave portion of the second uneven portion in a state in which the top foil is wound in a cylindrical shape so that at least one each is provided and the first uneven portion and the second uneven portion overlap. It may pass and the convex part of a 2nd uneven part may pass through the recessed part of a 1st uneven part.
- the structures of the first groove 13 and the fitting tool 16 may be appropriately changed in accordance with the number of convex portions and concave portions provided in the first uneven portion and the second uneven portion. Further, the number of convex portions and concave portions provided in the first uneven portion and the second uneven portion may be larger than the number in the present embodiment.
- the first uneven portion may include two convex portions and three concave portions
- the second uneven portion may include three convex portions and two concave portions.
- third grooves 15 are provided in the first groove 13 of the present embodiment, the present disclosure is not limited to this configuration, and other configurations may be used.
- a protruding piece for locking the circumferential ends of the top foil may be provided at the open end of the first groove 13.
- the top foil 9 is formed on the side on which the first uneven portion 23a is formed (one short side) and the side on which the second uneven portion 23b is formed (other short side).
- a thin-walled portion 24 is formed thinner than the central portion between them.
- the outer peripheral surface (the surface on the bearing housing 12 side) of these thin portions 24 is recessed from the outer peripheral surface of the central portion to be thin.
- the circumferential length L of the thin portion 24 is, as shown in FIG. 2, a length corresponding to one of the first groove 13 and the peak portion 11 c at the end of the back foil 11.
- the top foil 9 disposed in the bearing housing 12 has a step on the outer peripheral surface side, and is thin through the step.
- the thin portion 24 extends from the circumferential ends of the top foil 9 to a circumferential position beyond the closest peak 11 c.
- a plurality of pairs of engaging grooves 25 extending radially outward from the inner peripheral edge (inner peripheral surface) of the insertion hole 12a are formed on both axial end surfaces 12b of the bearing housing 12. It is done. That is, the end surface 12 b in the axial direction of the bearing housing 12 is provided with a recess extending to the inner peripheral surface of the bearing housing 12.
- the engagement groove 25 of the present disclosure is formed at positions where the end surface 12 b of the bearing housing 12 is divided into approximately three in the circumferential direction. And the engagement member 30 (engagement pin) mentioned later is engaging with these engagement groove
- the first groove 13 is disposed between two pairs of engagement grooves 25 of the three pairs of engagement grooves 25. Further, the pair of engagement grooves 25 are opposed to the first grooves 13 in the radial direction.
- the engaging groove 25 of the present embodiment is formed from the inner peripheral edge (inner peripheral surface) of the insertion hole 12a to the outer peripheral edge (outer peripheral surface) of the bearing housing 12, but the present disclosure is not limited thereto.
- the engagement groove may be formed from the inner peripheral edge (inner peripheral surface) of the insertion hole 12 a to an intermediate position in the thickness direction (radial direction) of the plate member constituting the bearing housing 12. That is, the engagement groove may not reach the outer peripheral edge of the bearing housing 12.
- the back foil 11 is disposed on the inner peripheral surface of the insertion hole 12 a of the bearing housing 12.
- the back foil 11 is a foil (thin plate) that elastically supports the intermediate foil 10 and the top foil 9.
- Such back foils 11 are, for example, bump foils, spring foils described in JP-A-2006-57652, JP-A-2004-270904, etc., JP-A-2009-299748 etc. Backfoil is used.
- a bump foil is used as the back foil 11.
- the back foil 11 of the present disclosure is constituted by three (plural) back foil pieces 11 a disposed along the inner circumferential surface of the insertion hole 12 a.
- the foil thin plate
- the three back foil pieces 11 a are curved so as to be generally cylindrical as a whole when viewed from the axial direction. That is, the back foil piece 11a is supported by the inner circumferential surface of the insertion hole 12a.
- all three back foil pieces 11a are formed in the same shape and size. Therefore, these back foil pieces 11 a are arranged by dividing the inner peripheral surface of the insertion hole 12 a into substantially three in the circumferential direction.
- peak portions 11c protruding inward in the radial direction and valley portions 11b protruding outward in the radial direction when viewed from the peaks 11c are alternately formed in the circumferential direction.
- the valley portion 11 b has a flat portion facing the bearing housing 12, and the flat portion can be in contact with the inner circumferential surface of the insertion hole 12 a.
- the peak part 11c can contact
- the back foil piece 11a elastically supports the top foil 9 via the intermediate foil piece 10a by the peak portion 11c.
- both ends of the back foil piece 11a all become the valley part 11b.
- FIG. 6 is an enlarged perspective view of the main part of the radial foil bearing 3 of the present disclosure.
- FIG. 7 is a schematic view in which the main part of the radial foil bearing 3 of the present disclosure is flattened, where (a) is a plan view and (b) is a front view.
- the back foil pieces 11a are respectively provided with notches 26 at both end edges in the axial direction. These notches 26 are formed in the valleys 11 b of the back foil piece 11 a.
- the notch 26 is formed at a circumferential position between circumferentially opposite ends of the back foil piece 11 a (in the present disclosure, a central position of the back foil piece 11 a in the circumferential direction). That is, in the back foil piece 11a, a recess is present in the axial direction at the circumferential position of both end edges in the axial direction.
- the notch 26 is disposed at a position corresponding to the engagement groove 25 of the bearing housing 12, that is, at a position overlapping the engagement groove 25 as shown in FIG. 6. In other words, the notch 26 is disposed at the same position as the engagement groove 25 in the axial direction and the circumferential direction.
- the width (the width in the circumferential direction) of the notch 26 is formed smaller than the width (the width in the circumferential direction) of the engagement groove 25. That is, both circumferential ends of the notch 26 are located at circumferential positions between circumferential ends of the engagement groove 25.
- the intermediate foil 10 is disposed between the top foil 9 and the back foil 11.
- the intermediate foil 10 is constituted by three intermediate foil pieces 10a disposed along the inner circumferential surface of the insertion hole 12a in the present disclosure.
- deployment shape is formed in the substantially rectangular shape as the intermediate
- the three intermediate foil pieces 10a are curved so as to be generally cylindrical as a whole, as shown in FIG.
- all three intermediate foil pieces 10a are formed in the same shape and size. Therefore, these intermediate foil pieces 10a are arranged by dividing the inner peripheral surface of the insertion hole 12a into substantially three in the circumferential direction.
- the outer shape of the intermediate foil piece 10a has a size substantially equal to the outer shape of the back foil piece 11a, as shown in FIG. 7 (a).
- the intermediate foil piece 10a has a flat portion 10b in contact with the top of the peak portion 11c of the back foil 11 and a concave portion 10c which is recessed further outward in the radial direction than the flat portion 10b. And. That is, the recess 10 c is separated from the top foil 9.
- the recessed part 10c is formed in the circumferential direction position between the circumferential direction both ends of the intermediate foil piece 10a (this embodiment central position of the intermediate foil piece 10a in the circumferential direction), as shown to Fig.7 (a).
- the recess 10c of the present disclosure is located radially outward of the flat portion 10b, has a flat bottom portion along the circumferential direction, and a taper located at both circumferential ends of the bottom portion and extending radially inward toward the flat portion 10b. Part. The distance between the pair of tapered portions increases from the radially outer side toward the inner side. As shown in FIG. 6, the width of the bottom of the recess 10c in the circumferential direction is longer than the width of the flat portion of the valley 11b of the back foil piece 11a in the circumferential direction.
- the circumferential width of the valley portion 11b in the present disclosure is the peak of the peak portion 11c and the peak of the valley portion 11b. It is assumed that the smaller one of the circumferential intervals of the peak portion 11 c and the valley portion 11 b of the back foil piece 11 a is at the intermediate radial direction position of the radial position.
- the thickness of the intermediate foil piece 10a is thinner than the back foil piece 11a.
- the rigidity of the intermediate foil 10 is equal to or less than half the rigidity of the back foil 11.
- the intermediate foil piece 10a is provided with notches 27 (second notches) at both axial end edges. These notches 27 are formed in the recess 10c of the intermediate foil piece 10a.
- the notches 27 are formed at circumferential positions between circumferentially opposite ends of the intermediate foil piece 10a (in the present disclosure, the central position of the intermediate foil piece 10a in the circumferential direction). That is, in the intermediate foil piece 10a, an axial recess is present at the circumferential positions of both axial end edges.
- notch 27 of the present disclosure a part of the bottom of the recess 10 c formed between the flat portion 10 b and the flat portion 10 b is cut away toward the central portion of the intermediate foil piece 10 a in the axial direction There is.
- the notch 27 is formed at a position corresponding to the engagement groove 25 of the bearing housing 12 and the notch 26 of the back foil piece 11a, ie, a position overlapping the engagement groove 25 and the notch 26 in the circumferential direction.
- the notches 27 are arranged at the same position as the engagement grooves 25 and the notches 26 in the axial direction and the circumferential direction.
- the width (circumferential width) of the notches 27 is smaller than the width (circumferential width) of the engagement groove 25 and is formed to be the same as the width (circumferential width) of the notches 26.
- An engagement member 30 is engaged with the engagement groove 25, the notch 26 and the notch 27.
- FIG. 8 is an enlarged front view of the engagement member 30 of the present disclosure.
- the engagement member 30 is attached to the bearing housing 12, passes through the notch 26 and the notch 27, and passes through the notch 27.
- the inner circumferential side (radial direction) of the intermediate foil 10 (intermediate foil piece 10a) In the inner side) it extends outside the formation range W of the notch 27 in the circumferential direction. Since the notch 27 of the present disclosure has the same formation range W as the notch 26 of the back foil 11 (back foil piece 11 a) in the circumferential direction, the engagement member 30 extends outside the formation range W of the notch 26 in the circumferential direction It can be said that In addition, the engagement member 30 of this indication is comprised by one plate-shaped member.
- the engagement member 30 is attached to the bearing housing 12 in a state where it passes through the notches 26 and the notches 27 and on the inner peripheral side (radially inner side) of the intermediate foil 10 (intermediate foil piece 10a) It extends out of the formation range W of the notch 27 in the circumferential direction.
- the engagement member 30 of this embodiment is a member different from any of the back foil 11 and the intermediate foil 10.
- the engagement member 30 of the present embodiment is a member formed integrally. That is, the engaging member 30 has a first portion facing the circumferentially one surface of the engaging groove 25, a second portion facing the other circumferentially surface of the engaging groove 25, and the first portion. And a third portion connecting the second portion.
- the engagement member 30 of this embodiment is provided with a constriction part. That is, the engagement member 30 is formed with a portion where the circumferential width of the engagement member 30 decreases and a portion where the width increases as it goes from the inner peripheral side to the outer peripheral side in the radial direction. The neck portion is formed.
- the notches 26 and the notches 27 are disposed at positions corresponding to the above-described constricted portion of the engagement member 30 in the radial direction.
- the engagement member 30 includes an engagement portion 31 engaged with the engagement groove 25 of the bearing housing 12, an insertion portion 32 through which the notch 26 and the notch 27 are inserted (or inserted), and the intermediate foil 10 (back foil 11). And the return part 33 which opposes the inner peripheral side of.
- the engaging portions 31 are in contact with the inner surfaces 25 a at both ends in the circumferential direction of the engaging groove 25.
- the inner surfaces 25a of the engagement grooves 25 face each other at intervals in the circumferential direction, and extend in parallel in the radial direction.
- the engaging portion 31 is formed in a rectangular frame shape in contact with each of the inner surfaces 25 a of the engaging groove 25 with a predetermined width in the radial direction.
- the engaging portion 31 is smoothly separated from the inner surface 25a by, for example, providing R (curved shape). That is, the corner of the rectangular frame of the engaging portion 31 has a curved shape.
- the insertion portion 32 extends in parallel in the radial direction from the upper portion of the rectangular frame-like engaging portion 31.
- Two insertion parts 32 are formed from the engagement part 31, and are mutually separated.
- the insertion part 32 and the engaging part 31 are smoothly connected by giving R (curved shape) or the like.
- the insertion portion 32 abuts on the intermediate foil piece 10a and the back foil piece 11a in the axial direction.
- the return portion 33 is formed by being bent in mutually opposite directions in the circumferential direction from the tip end portion of the insertion portion 32 which extends in parallel in the radial direction. That is, the engagement member 30 includes a pair of return portions 33 extending in opposite directions in the circumferential direction. The pair of return portions 33 is accommodated in the recess 10 c of the intermediate foil 10 and located radially outward of the opening position (upper end, radially inner end) of the recess 10 c.
- the engagement member of the present disclosure includes an engagement portion attached to the bearing housing 12, an insertion portion connected to the engagement portion and disposed through the notch 26 and the notch 27, and the insertion portion. It may be constituted from a return part which is connected to the part and which protrudes to at least one side in the circumferential direction and extends out of the formation range W of the notch 27.
- the engagement member 30 of the present disclosure extends over a wider range than the formation range W of the notches 27 (notches 26) on the inner peripheral side (surface in the circumferential direction) of the intermediate foil 10 (back foil 11).
- W1> W the width between both ends of the pair of return parts 33 extending in opposite directions.
- variety of the circumferential direction) of the insertion part 32 is set to W2, it has the relationship of W1> W> W2.
- W3> W1> W> W2 is satisfied.
- W3 may be smaller than W1.
- W1 extends over a wider range than the valley portion 11b of the back foil 11. Further, the engagement member 30 does not protrude radially inward from the flat portion 10 b. Further, assuming that the thickness of the plate-like member of the engagement member 30 is T, W1-W2 + 2T> W2 holds.
- the engagement member 30 is in contact with the inner surface 25 a of the engagement groove 25 in a stored state.
- the engagement member 30 of the present disclosure is formed by bending a single plate spring (elastic member) into a substantially C shape (bottle shape).
- the engagement portion 31 of the engagement member 30 is engaged with the engagement groove 25 in a state of being slightly contracted in the circumferential direction.
- the spring back which is going to open in the circumferential direction acts on the engaging portion 31.
- a frictional force is developed between the engagement portion 31 and the inner surface 25 a of the engagement groove 25, and the engagement member 30 is held by the bearing housing 12.
- the "accumulation state" of this indication means the elastic compression state.
- lids 50 are attached to both axial end surfaces 12 b of the bearing housing 12.
- the lid 50 covers at least a part of the engagement groove 25 in which the engagement portion 31 of the engagement member 30 is accommodated.
- the lid 50 axially faces at least a part of the engagement portion 31.
- the lid 50 of the present disclosure is formed in an annular plate shape along the circumferential direction of the bearing housing 12.
- the diameter of the inner periphery of the lid 50 is larger than the diameter of the inner periphery of the bearing housing 12, and the diameter of the outer periphery of the lid 50 is smaller than the diameter of the outer periphery of the bearing housing 12.
- the lid 50 is screwed with a screw 51 in a screw hole 52 (see FIG. 2) formed in the bearing housing 12 in the vicinity of the engagement groove 25.
- the lid 50 of the present disclosure is screwed to positions where the end surface 12 b of the bearing housing 12 is divided into approximately three in the circumferential direction.
- the lid 50 covering the engagement groove 25 accommodating the engagement member 30 is attached to the end face 12 b of the bearing housing 12, so that the engagement member 30 extends in the axial direction from the bearing housing 12. It is possible to suppress disengaging.
- the attachment method to the bearing housing 12 of the cover 50 is not specifically limited.
- the top foil 9 is biased toward the rotating shaft 1 by the back foil 11 (three back foil pieces 11 a) via the intermediate file 10 (three middle foil pieces 10 a). It is in close contact with the rotating shaft 1.
- both end portions of the top foil 9 are thin portions 24, in these thin portions 24, the force for tightening the rotary shaft 1 (local preload) and relaxation compared to the case without the thin portions 24. Be done.
- the film pressure of the fluid lubricating film acts on the top foil 9 and presses the individual ridges 11 c of the back foil piece 11 a via the intermediate foil 10 in contact with the top foil 9. Then, the back foil piece 11a is pressed against the intermediate foil 10, so that the peak portion 11c is spread out, whereby the back foil piece 11a tries to move in the circumferential direction on the bearing housing 12. That is, in order to elastically support the top foil 9 via the intermediate foil 10, the back foil piece 11a (back foil 11) deforms in the circumferential direction when it receives a load from the top foil 9, It allows deflection of the top foil 9 and the intermediate foil 10 and supports it.
- an engagement member 30 is inserted through a notch 26 formed at an end edge in the axial direction.
- the engagement member 30 is engaged with the engagement groove 25 of the bearing housing 12.
- rotation of the back foil piece 11a in the circumferential direction is suppressed. Therefore, the individual ridges 11c of the back foil piece 11a sandwich the notch 26 engaged by the engagement member 30 and deform (move) in the circumferential direction.
- the insertion portion 32 of the engagement member 30 is in contact with the back foil piece 11 a, and also suppresses the movement of the back foil piece 11 a in the axial direction. Further, as shown in FIG. 8, the engagement member 30 extends outside the formation range W of the notch 26 in the circumferential direction of the insertion hole 12 a on the inner peripheral side of the back foil 11 passing through the notch 26. That is, in the engagement member 30, a return portion 33 is formed on the inner peripheral side of the back foil 11 passing through the notch 26, and this serves as a retention prevention for the back foil piece 11a in the radial direction. Therefore, falling off of the back foil piece 11a is suppressed.
- a notch 27 is formed in the intermediate foil piece 10a as well as the back foil piece 11a, and the engagement member 30 is inserted therethrough. For this reason, the intermediate foil piece 10a is also suppressed from falling off.
- the intermediate foil piece 10a bends together with the top foil 9 and the back foil piece 11a when transferring the load from the top foil 9 to the back foil piece 11a, but at this time, the middle foil piece 10a and the top foil 9 or the back foil piece 11a There is a "slip" between them. That is, when pressure fluctuation occurs in the fluid lubricating film due to axial vibration of the rotary shaft 1, the pressure fluctuation is transmitted to the top foil 9, and the "slip" occurs. Since this "slip" causes energy dissipation due to friction and dampens the film pressure fluctuation, the axial vibration of the rotary shaft 1 is suppressed.
- the bearing housing 12 having the insertion hole 12a and the back provided with the notch 26 at the end edge in the axial direction which is disposed on the inner peripheral surface of the insertion hole 12a and extends the insertion hole 12a It is attached to the foil 11 and the bearing housing 12, passes through the notch 26, and extends outside the forming range W of the notch 26 in the circumferential direction of the insertion hole 12a on the inner peripheral side of the back foil 11 passing through the notch 26.
- FIGS. 9 to 12 a modification as shown in FIGS. 9 to 12 can be adopted.
- the same or equivalent components as or to those of the embodiment described above are designated by the same reference numerals, any explanation of which will be simplified or omitted.
- the engaging member 30A shown in FIG. 9 has a configuration in which a fold side is wound after folding a single plate spring into two.
- the engaging member 30A has an engaging portion 31a whose outer shape is wound in a rectangular shape (as viewed in the axial direction of the insertion hole 12a), and a pair of insertion portions 32a extending from one corner of the engaging portion 31a, And a pair of return parts 33a bent in opposite directions from the tip end of the pair of insertion parts 32a.
- a space is formed in the circumferential direction between a portion of the engaging member 30A that contacts the inner surface 25a on one side in the circumferential direction of the engaging groove 25 and a portion that contacts the inner surface 25a on the other side in the circumferential direction.
- part is connected, and the radial direction inner side is separated. That is, in the cross section orthogonal to the axial direction, the radially inner side of the region to be the air gap is released. Further, the two-folded tip end side is bent and is directed radially inward and is close to the insertion portion 32a.
- the engaging portion 31a is doubly wound, the spring back with respect to the inner surface 25a of the engaging groove 25 can be made larger than that of the above embodiment. That is, it is possible to improve the energizing force with respect to the inner surface of the engaging groove 25 of the engaging part 31a arrange
- the engagement member 30B shown in FIG. 10 has a configuration formed by not folding a single plate spring into two.
- the engaging member 30B includes an engaging portion 31b formed by bending a plate into a square (or a U-shape), an insertion portion 32b having no overlapping in the circumferential direction between the plates, and a circumferential direction outside from the tip of the insertion portion 32b. And a bent portion 33b. That is, also in the engaging member 30B of the present modification, a gap in the circumferential direction is provided between the portion in contact with the inner surface 25a on one side in the circumferential direction of the engaging groove 25 and the portion in contact with the inner surface 25a on the other side in the circumferential direction.
- part is connected, and the radial direction inner side is separated. That is, in the cross section orthogonal to the axial direction, the radially inner side of the region to be the air gap is released.
- the return portion 33b extends from the radial inner position of the insertion portion 32b in a direction forming an obtuse angle with the direction extending inward from the radial outer side of the insertion portion 32b. According to this configuration, the number of return portions 33 is one.
- the engagement member of the present disclosure is attached to the bearing housing 12 in a state where it passes through the notch 26 and the notch 27 and one of the circumferential directions of the insertion hole 12a on the inner peripheral side of the intermediate foil 10 (intermediate foil piece 10a) It may be configured to extend only to the side.
- the pair of return parts 33 is used in the said embodiment, the structure provided with only one return part 33 may be sufficient.
- the engagement member 30C shown in FIG. 11A has a configuration in which one H-shaped leaf spring is bent.
- FIG. 11B is a view (bottom view) taken along arrow A of FIG.
- the engaging member 30C includes an engaging portion 31c having folded portions 31c1 and 31c2, a pair of insertion portions 32c extending upward (inward in the radial direction) from the engagement portion 31c, and a tip end of the pair of insertion portions 32c. And a pair of barbs 33c bent in opposite directions. That is, the engaging member 30C of this modification includes the barbed portion 33c and a portion extending radially outward from the barbed portion 33c. In addition, from the part extending outward in the radial direction, the part extending in the circumferential direction is provided.
- a part extending radially inward from a position close to the inner surface 25 a of the engagement groove 25 of the part extending to the circumferentially separated side is provided.
- a portion extending radially inward from a position close to the inner surface 25a terminates radially inward.
- one side in the axial direction is connected in the circumferential direction.
- the folded back portions 31c1 are the left and right folded back portions of the H-shaped leaf spring.
- the folded back portion 31c2 is a folded back portion of both leg portions of the H-shaped leaf spring. According to this configuration, springback in two directions of the folded portions 31c1 and 31c2 acts on the engaging portion 31.
- the engaging member 30D shown in FIG. 12 has a configuration cut out from a single plate spring.
- the engaging member 30D extends in opposite directions from the distal end of the insertion portion 32d extending from the upper portion (radially inner end) of the engaging portion 31d and the insertion portion 32d. And a pair of return parts 33d. According to this configuration, since the engagement member 30D can be formed by press processing or the like, molding of the engagement member 30D is facilitated.
- the width (the width in the circumferential direction) of the engaging portion 31 is larger than the width (the width in the circumferential direction) of the insertion portion 32 is illustrated.
- the same T-shaped engagement member 30 may be adopted as the width (the width in the circumferential direction) of the engaging portion 31 and the width (the width in the circumferential direction) of the insertion portion 32.
- middle foil 10 was illustrated in the said embodiment.
- the intermediate foil 10 may be omitted, and the engagement member 30 may be hooked only to the back foil 11.
- the engagement member of the present disclosure is attached to the bearing housing 12 through the notch 26 in the case where the intermediate foil is not provided, and the inner peripheral side (radially inner side) of the back foil 11 (back foil piece 11a) ) May extend to the outside of the formation range of the notch 26 in the circumferential direction of the insertion hole 12a.
- the return part of the engaging member may be accommodated in the valley 11b of the back foil 11, or may be arranged only in the range corresponding to the valley 11b in the circumferential direction.
- the engagement member of the present disclosure is connected to the engagement portion attached to the bearing housing 12 and the engagement portion and disposed through the notch 26 when the intermediate foil is not provided.
- the insertion portion may be configured of a return portion connected to the insertion portion and projecting to at least one side in the circumferential direction and extending out of the formation range of the notch 26.
- the radial foil bearing 3 provided with the cover 50 was illustrated.
- the lid 50 may not be necessary.
- the inner surface 25 a of the engagement groove 25 may be coated to adjust the friction.
- a copper coating can be used as this coating.
- a pair of engagement grooves 25 extending radially outward from the inner peripheral edge of the insertion hole 12a in the axial both end faces 12b of the bearing housing 12.
- the engagement groove 25 may be formed only on one end face 12 b in the axial direction of the bearing housing 12.
- the lid 50 may be attached only to the one end face 12b.
- the notch 26 of the back foil 11, the notch 27 of the intermediate foil 10, and the engagement member 30 are provided on only one axial side, and the other side May not be provided.
- the present disclosure can be utilized for a radial foil bearing that supports and supports a rotating shaft.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
本願は、2017年6月27日に日本に出願された特願2017-124795号に基づき優先権を主張し、その内容をここに援用する。
図1中、符号1は回転軸、符号2は回転軸の軸方向の一方側の先端に設けられたインペラ、符号3は本開示に係るラジアルフォイル軸受である。なお、図1では省略してラジアルフォイル軸受を一つしか記載していないが、通常は回転軸1の軸方向にラジアルフォイル軸受が二つ設けられている。したがって、本実施形態においてもラジアルフォイル軸受3が二つ設けられている。
ラジアルフォイル軸受3は、回転軸1を取り囲むように設けられて、該回転軸1を支持する軸受である。ラジアルフォイル軸受3は、トップフォイル9と、中間フォイル10と、バックフォイル11と、軸受ハウジング12(ハウジング)と、を備える。軸受ハウジング12は、回転軸1が挿通される挿通孔12aを有する。なお、本開示の挿通孔12aが形成された軸受ハウジング12は、円筒状となっている。
トップフォイル9は、図4(a)に示すように、周方向を長辺とし、軸方向を短辺とする略矩形状の金属箔である。このトップフォイル9は、図2に示すように、円筒状に巻かれて、回転軸1の外周面に対向して配置されている。
軸受ハウジング12には、図5(a)及び図5(b)に示すように、第1溝13の両端部に連通する第2溝14がそれぞれ形成されている。第2溝14は、軸受ハウジング12の軸方向における両端面12bにそれぞれ形成されており、軸受ハウジング12の内周縁から径方向外側に向かって延伸している。
バックフォイル片11aは、図6及び図7(a)に示すように、軸方向の両端縁に切欠26をそれぞれ備える。これらの切欠26は、バックフォイル片11aの谷部11bに形成されている。
係合部材30は、図8に示すように、軸受ハウジング12に取り付けられ、切欠26及び切欠27を通り、該切欠27を通った中間フォイル10(中間フォイル片10a)の内周側(径方向内側)において、周方向における切欠27の形成範囲W外まで延伸している。本開示の切欠27は、周方向においてバックフォイル11(バックフォイル片11a)の切欠26と同じ形成範囲Wを有するため、係合部材30は、周方向における切欠26の形成範囲W外まで延伸していると言える。なお、本開示の係合部材30は、一つの板状の部材で構成される。
なお、本実施形態の係合部材30は、バックフォイル11及び中間フォイル10のいずれとも異なる部材である。
また、本実施形態の係合部材30は、一体的に形成された部材である。つまり、係合部材30は、係合溝25の周方向一方側の面と対面する第1部位と、係合溝25の周方向他方側の面と対面する第2部位と、前記第1部位及び前記第2部位とを接続する第3部位とを備える。また、本実施形態の係合部材30は、くびれ部を備える。つまり、係合部材30には、径方向内周側から径方向外周側に向かうに従い、係合部材30の周方向幅が縮小する部位と拡大する部位とが形成されており、これらの部位によって前記くびれ部が形成されている。本実施形態において、切欠26及び切欠27は、径方向において係合部材30の前記くびれ部に相当する位置に配置されている。
回転軸1が停止した状態では、トップフォイル9はバックフォイル11(3つのバックフォイル片11a)によって中間ファイル10(3つの中間フォイル片10a)を介して回転軸1側に付勢されることで回転軸1に密着している。なお、本実施形態では、トップフォイル9の両端部が薄肉部24となっているので、これら薄肉部24では回転軸1を締め付ける力(局所的なプリロード)、薄肉部24がない場合と比べ緩和される。
言い換えれば、本開示の係合部材は、中間フォイルが設けられない場合において、軸受ハウジング12に取り付けられた係合部と、この係合部に接続されると共に切欠26を通過して配置される挿通部と、この挿通部に接続されると共に周方向の少なくとも一方側に突出して切欠26の形成範囲外まで延伸している返し部と、から構成されてもよい。
9 トップフォイル
10 中間フォイル
10a 中間フォイル片
11 バックフォイル
11a バックフォイル片
12 軸受ハウジング(ハウジング)
12a 挿通孔
12b 端面
25 係合溝
25a 内面
26 切欠
27 切欠(第2の切欠)
30 係合部材
31 係合部
32 挿通部
33 返し部
50 蓋体
W 形成範囲
Claims (6)
- 挿通孔を有するハウジングと、
前記挿通孔の内周面に配置され、前記挿通孔が延びる軸方向における端縁に切欠を備えるバックフォイルと、
前記切欠を通った状態で前記ハウジングに取り付けられ、前記バックフォイルの内周側において、前記挿通孔の周方向における前記切欠の形成範囲外まで延伸している係合部材と、を備える、ラジアルフォイル軸受。 - 前記係合部材は、前記バックフォイルの内周側において、前記切欠の形成範囲よりも前記周方向両側に延伸している、請求項1に記載のラジアルフォイル軸受。
- 前記バックフォイルに支持され、前記軸方向における端縁に第2の切欠を備える中間フォイルを備え、
前記係合部材は、前記切欠と前記第2の切欠とを通った状態で前記ハウジングに取り付けられ、前記中間フォイルの内周側において、前記挿通孔の周方向における前記第2の切欠の形成範囲外まで延伸している、請求項1または2に記載のラジアルフォイル軸受。 - 前記ハウジングの前記軸方向における端面に、前記挿通孔の内周縁から径方向外側に向かって延伸する係合溝が設けられ、
前記係合部材は、前記係合溝の内面に当接している、請求項1~3のいずれか一項に記載のラジアルフォイル軸受。 - 前記係合部材は、蓄勢状態で前記係合溝の内面に当接している、請求項4に記載のラジアルフォイル軸受。
- 前記ハウジングの前記軸方向の前記端面に取り付けられ、前記係合部材を収容している前記係合溝を覆う蓋体を備える、請求項4または5に記載のラジアルフォイル軸受。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18825537.6A EP3647613B1 (en) | 2017-06-27 | 2018-06-27 | Radial foil bearing |
CA3068571A CA3068571A1 (en) | 2017-06-27 | 2018-06-27 | Radial foil bearing |
CN201880043440.1A CN110799764B (zh) | 2017-06-27 | 2018-06-27 | 径向箔轴承 |
JP2019526976A JP6806251B2 (ja) | 2017-06-27 | 2018-06-27 | ラジアルフォイル軸受 |
US16/727,022 US11092192B2 (en) | 2017-06-27 | 2019-12-26 | Radial foil bearing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017-124795 | 2017-06-27 | ||
JP2017124795 | 2017-06-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/727,022 Continuation US11092192B2 (en) | 2017-06-27 | 2019-12-26 | Radial foil bearing |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019004278A1 true WO2019004278A1 (ja) | 2019-01-03 |
Family
ID=64742340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2018/024343 WO2019004278A1 (ja) | 2017-06-27 | 2018-06-27 | ラジアルフォイル軸受 |
Country Status (6)
Country | Link |
---|---|
US (1) | US11092192B2 (ja) |
EP (1) | EP3647613B1 (ja) |
JP (1) | JP6806251B2 (ja) |
CN (1) | CN110799764B (ja) |
CA (1) | CA3068571A1 (ja) |
WO (1) | WO2019004278A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113710908A (zh) * | 2019-04-04 | 2021-11-26 | 株式会社Ihi | 径向箔轴承 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7027968B2 (ja) * | 2018-03-07 | 2022-03-02 | 株式会社Ihi | ラジアルフォイル軸受 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004270904A (ja) | 2003-03-12 | 2004-09-30 | Honda Motor Co Ltd | フォイル式流体軸受 |
JP2006057652A (ja) | 2004-08-17 | 2006-03-02 | Kawasaki Heavy Ind Ltd | 動圧流体軸受 |
JP2009299748A (ja) | 2008-06-12 | 2009-12-24 | Ihi Corp | フォイル軸受 |
JP2010529390A (ja) | 2007-06-12 | 2010-08-26 | ケイターボ,インコーポレイテッド | シール機能を含むラジアルフォイル軸受 |
WO2012127998A1 (ja) * | 2011-03-22 | 2012-09-27 | Ntn株式会社 | フォイル軸受およびその製造方法 |
JP2013100850A (ja) | 2011-11-08 | 2013-05-23 | Tokai Rubber Ind Ltd | 電磁式アクチュエータとそれを用いた能動型制振器 |
JP2014020463A (ja) | 2012-07-18 | 2014-02-03 | Ihi Corp | ラジアルフォイル軸受 |
JP2014037857A (ja) | 2012-08-14 | 2014-02-27 | Ihi Corp | ラジアルフォイル軸受 |
JP2017124795A (ja) | 2016-01-15 | 2017-07-20 | トヨタ自動車株式会社 | 車両用情報提供装置 |
WO2018153226A1 (en) | 2017-02-23 | 2018-08-30 | The Hongkong Polytechnic University | Improved passive vibration reducing apparatus |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA747800A (en) * | 1966-12-06 | J. Marley David | Hydrodynamic foil bearings with bearing foil retaining means | |
US5915841A (en) | 1998-01-05 | 1999-06-29 | Capstone Turbine Corporation | Compliant foil fluid film radial bearing |
US7070330B2 (en) | 2004-02-19 | 2006-07-04 | R & D Dynamics Corporation | Hydrodynamic fluid film bearing having a key-less foil |
JP5817449B2 (ja) | 2011-11-09 | 2015-11-18 | 株式会社Ihi | ラジアルフォイル軸受 |
US20150362012A1 (en) * | 2012-11-02 | 2015-12-17 | Yury Ivanovich Ermilov | Foil bearing assembly |
EP3109494B1 (en) | 2014-02-18 | 2019-07-24 | IHI Corporation | Radial foil bearing |
KR101534639B1 (ko) * | 2014-03-21 | 2015-07-09 | 한국기계연구원 | 복합 강성 구조의 메탈 메쉬 포일 래디얼 쓰러스트 콤보 베어링 |
US9360042B2 (en) * | 2014-04-15 | 2016-06-07 | Honeywell International Inc. | Bearing sleeve for air bearing |
-
2018
- 2018-06-27 CN CN201880043440.1A patent/CN110799764B/zh active Active
- 2018-06-27 EP EP18825537.6A patent/EP3647613B1/en active Active
- 2018-06-27 WO PCT/JP2018/024343 patent/WO2019004278A1/ja unknown
- 2018-06-27 CA CA3068571A patent/CA3068571A1/en not_active Abandoned
- 2018-06-27 JP JP2019526976A patent/JP6806251B2/ja active Active
-
2019
- 2019-12-26 US US16/727,022 patent/US11092192B2/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004270904A (ja) | 2003-03-12 | 2004-09-30 | Honda Motor Co Ltd | フォイル式流体軸受 |
JP2006057652A (ja) | 2004-08-17 | 2006-03-02 | Kawasaki Heavy Ind Ltd | 動圧流体軸受 |
JP2010529390A (ja) | 2007-06-12 | 2010-08-26 | ケイターボ,インコーポレイテッド | シール機能を含むラジアルフォイル軸受 |
JP2009299748A (ja) | 2008-06-12 | 2009-12-24 | Ihi Corp | フォイル軸受 |
WO2012127998A1 (ja) * | 2011-03-22 | 2012-09-27 | Ntn株式会社 | フォイル軸受およびその製造方法 |
JP2013100850A (ja) | 2011-11-08 | 2013-05-23 | Tokai Rubber Ind Ltd | 電磁式アクチュエータとそれを用いた能動型制振器 |
JP2014020463A (ja) | 2012-07-18 | 2014-02-03 | Ihi Corp | ラジアルフォイル軸受 |
JP2014037857A (ja) | 2012-08-14 | 2014-02-27 | Ihi Corp | ラジアルフォイル軸受 |
JP2017124795A (ja) | 2016-01-15 | 2017-07-20 | トヨタ自動車株式会社 | 車両用情報提供装置 |
WO2018153226A1 (en) | 2017-02-23 | 2018-08-30 | The Hongkong Polytechnic University | Improved passive vibration reducing apparatus |
Non-Patent Citations (1)
Title |
---|
See also references of EP3647613A4 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113710908A (zh) * | 2019-04-04 | 2021-11-26 | 株式会社Ihi | 径向箔轴承 |
EP3951198A4 (en) * | 2019-04-04 | 2022-12-07 | IHI Corporation | RADIAL FOIL BEARING |
US11940005B2 (en) | 2019-04-04 | 2024-03-26 | Ihi Corporation | Radial foil bearing |
Also Published As
Publication number | Publication date |
---|---|
EP3647613B1 (en) | 2022-04-27 |
US20200224713A1 (en) | 2020-07-16 |
EP3647613A1 (en) | 2020-05-06 |
JP6806251B2 (ja) | 2021-01-06 |
JPWO2019004278A1 (ja) | 2020-05-21 |
CN110799764B (zh) | 2021-06-04 |
CA3068571A1 (en) | 2019-01-03 |
US11092192B2 (en) | 2021-08-17 |
CN110799764A (zh) | 2020-02-14 |
EP3647613A4 (en) | 2021-01-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014014036A1 (ja) | ラジアルフォイル軸受 | |
US11306772B2 (en) | Radial foil bearing | |
US20200408246A1 (en) | Radial foil bearing | |
WO2019004278A1 (ja) | ラジアルフォイル軸受 | |
JP6658959B2 (ja) | ラジアルフォイル軸受 | |
WO2019004287A1 (ja) | ラジアルフォイル軸受 | |
JP6828802B2 (ja) | ラジアルフォイル軸受 | |
US20220010834A1 (en) | Radial foil bearing | |
JP7013951B2 (ja) | ラジアルフォイル軸受 | |
JP6225684B2 (ja) | ダンパ装置 | |
JP2021165576A (ja) | ラジアルフォイル軸受 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18825537 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2019526976 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 3068571 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2018825537 Country of ref document: EP Effective date: 20200127 |