Abstract: A radial foil bearing includes: a cylindrical top foil disposed so as to face a rotary shaft; a back foil disposed outside in the radial direction of the top foil; and a cylindrical bearing housing accommodating the top foil and the back foil. The bearing housing is provided with a limiting member which limits movement of the back foil. A locking recess is provided in a central part in the axial direction of an inner circumferential surface of the bearing housing. In addition, the limiting member includes a locking protrusion and is fixed to the bearing housing by the locking protrusion being locked into the locking recess.

Abstract: A thrust bearing disposed facing a thrust collar provided on a rotary shaft, the thrust bearing includes: a top foil disposed facing the thrust collar; a back foil disposed on a side of the top foil opposite to another side of the top foil facing the thrust collar; and an annular plate-shaped base plate supporting the back foil. The back foil is formed of a plurality of back foil pieces. The top foil is formed of a plurality of top foil pieces. A vibration-damping foil piece is disposed in each of the positions between the back foil pieces and the top foil pieces.

Abstract: A thrust bearing is a thrust bearing disposed facing a thrust collar provided on a rotary shaft and includes a top foil, a back foil and a base plate. The back foil includes a plurality of back foil pieces. The top foil includes a plurality of top foil pieces. In addition, a leading side of the top foil piece in the rotation direction of the rotary shaft is provided with a fixed part fixed to the base plate, the top foil piece is provided with a thin part in which a part is removed from the surface of the top foil piece facing the back foil piece, and the thin part extends from an outer circumferential edge to an inner circumferential edge or to a side edge of the top foil piece.

Abstract: A thrust bearing is a thrust bearing disposed facing a thrust collar provided on a rotary shaft and includes a top foil, a back foil and a base plate. The back foil includes a plurality of back foil pieces. The top foil includes a plurality of top foil pieces. In addition, a leading side of the top foil piece in the rotation direction of the rotary shaft is provided with a fixed part fixed to the base plate, an inner circumferential edge side of the top foil piece is provided with an inner circumferential edge-side thin part in which a part is removed from the surface of the top foil piece facing the back foil piece, and the inner circumferential edge-side thin part is formed to be thinner than an outer circumferential edge side of the top foil piece.

Abstract: A radial foil bearing (3) that supports a rotating shaft (1). This radial foil bearing (3) is provided with a top foil (10), a back foil (11), and a bearing housing (12) that houses them. A through-slot (13) is formed in the inner circumferential surface of the bearing housing (12), and engagement slots (20) are formed in the through-slot (13) by a fixing tool (16).

Abstract: The radial foil bearing includes: a top foil disposed facing a rotary shaft; an intermediate foil disposed outside of the top foil in the radial direction thereof; a back foil disposed outside of the intermediate foil in the radial direction; and a cylindrical bearing housing accommodating the top foil, the intermediate foil and the back foil. Engagement recesses are formed on both side surfaces of the bearing housing so as to be opposite to each other. The intermediate foil includes intermediate foil pieces disposed in the circumferential direction of the bearing housing. An engagement-projecting piece engaging with the engagement recess is formed in each intermediate foil piece.

Abstract: The radial foil bearing for surrounding and supporting a rotary shaft includes a cylindrical top foil disposed so as to face the rotary shaft, a back foil disposed at a radially outer side of the top foil, and a cylindrical bearing housing accommodating the top foil and the back foil. Engagement-projecting portions are provided on both ends of an inner circumferential surface of the bearing housing. Engagement notches engaging with the engagement-projecting portions are formed on both ends of the back foil.

Abstract: A thrust bearing disposed facing a thrust collar provided on a rotary shaft includes: a top foil disposed facing the thrust collar; a back foil supporting the top foil; and an annular shaped base plate supporting the back foil. The back foil includes back foil pieces, and the top foil includes top foil pieces. An area on the leading side of a top foil piece in the rotation direction of the rotary shaft is provided with a fixed part fixed to the base plate. A fixed edge positioned on the trailing side of the fixed part in the rotation direction linearly extends such that the separation between a straight line extending in the radial direction of the base plate and the fixed edge positioned on the trailing side of the straight line in the rotation direction gradually increases outward from inside in the radial direction.

Abstract: The radial foil bearing includes: a top foil; an intermediate foil; a back foil; and a bearing housing accommodating the top foil the intermediate foil and the back foil. The top foil is formed by winding a rectangular metal foil which includes a first uneven portion and a second uneven portion, into a cylindrical shape so as to overlap the first and second uneven portions with each other, wherein the first uneven portion is composed of a projecting portion and a depressed portion formed on one edge of the metal toil, and the second uneven portion is composed of a depressed portion, and a projecting portion formed on another edge of the metal foil. The projecting portions of the first and second uneven portions pulled out near the bearing housing engage with engagement grooves of the hearing housing.

Abstract: The radial foil bearing (3, 20) includes, a cylindrical top foil (10, 21), a back foil (11) disposed on a radially outer side of the top foil (10, 21), and a cylindrical bearing housing (12, 25) accommodating the top foil (10, 21) and the back foil (11). The top foil (10, 21) is formed by winding a rectangular metal foil around a rotary shaft (1) in a circumferential direction thereof. The metal foil includes a first uneven portion (17a, 23a) which has a first projecting portion (15a, 22a) and a first depressed portion (16a, 23a) on a first side thereof, and a second uneven portion (17b, 24b) which has a second projecting portion (15b, 22b) and a second depressed portion (16b, 23b) on a second side opposite to the first side. The metal foil is wound in a cylindrical shape so that the first uneven portion (17a, 23a) and the second uneven portion (17b, 24b) overlap with each other.

Abstract: The radial foil bearing (3) for supporting a rotary shaft (1) includes a cylindrical top foil (10) disposed to face the rotary shaft (1), a back foil (11) disposed on a radially outer side of the top foil (10), and a cylindrical bearing housing (12) accommodating the top foil (10) and the back foil (11). The back foil (11) is formed in a cylindrical shape using at least one back foil piece (11a). The back foil piece (11a) includes peak portions (11c) and valley portions (11b) which are alternately formed in a circumferential direction of the top foil (10) and is fixed to the bearing housing (12) at an intermediate portion between both end portions in a circumferential direction of the back foil piece.

Abstract: The present invention relates to a radial foil bearing for supporting a rotary shaft. The radial foil bearing includes a top foil, a back foil, and a bearing housing accommodating the top and back foils. The top foil is formed by winding a rectangular metal foil into a cylindrical shape so that one end of the metal foil is extended out in a tangential direction of a cylinder formed by the metal foil. An engagement groove is formed on an inner circumferential surface of the bearing housing in an axial direction of the bearing housing, and the engagement groove is formed so that a depth direction thereof corresponds to one tangential direction of the cylinder of the top foil. The one end of the top foil engages with the engagement groove.

Abstract: This relates to a radial foil bearing (3) that supports a rotating shaft (1). The radial foil bearing (3) is provided with a top foil (10), a back foil (11), and a bearing housing (12) that houses them. An engagement notch (15) that extends from the inner circumferential edge to the outer circumferential edge of the bearing housing (12) is formed at both sides of the bearing housing (12). An engagement protruding piece (30) that engages with each engagement notch (15) is provided at both side end portions of the back foil (11) on one side in the circumferential direction of the bearing housing (12).

Abstract: A radial foil bearing (3) that supports a rotating shaft (1). This radial foil bearing (3) is provided with a top foil (10), a back foil (11), and a bearing housing (12) that houses them. A through-slot (13) is formed in the inner circumferential surface of the bearing housing (12), and engagement slots (20) are formed in the through-slot (13) by a fixing tool (16).

Abstract: The radial foil bearing includes a top foil, a back foil, and a bearing housing accommodating the top and back foils, and supports a rotary shaft. Engagement grooves are formed on both side surfaces of the bearing housing to extend from the outer circumferential edge to the inner circumferential edge of the side surface. Notches are formed in circumferential edges on both sides of the back foil. A locking member is locked into the engagement grooves of the bearing housing and the notches of the back foil, and includes a pair of engagement legs engaging with the engagement grooves and the notches, and a connection portion connecting the engagement legs together to be disposed near one ends of the engagement legs.

Abstract: Provided is a gear-driven turbo compressor capable of increasing a natural frequency of a shaft by shortening the length of an overhang from a radial bearing to a shaft end, reducing an effort of replacing lubricant and an environmental burden by greatly reducing the amount of the lubricant, and reducing the necessity for maintenance by reducing a problem of the radial bearing caused by depleted materials of the lubricant. The gear-driven turbo compressor includes: a gas bearing 32 which is in communication with a compressed gas compressed by an impeller 16 and rotatably supports both ends of a pinion shaft 13; and an inner gas seal 34 which is positioned between the gas bearing and a thrust collar, maintains the gas bearing to be compressed by the compressed gas, and prevents intrusion of lubricant for gears due to the compressed gas.

Abstract: The radial foil bearing for surrounding and supporting a rotary shaft includes a cylindrical top foil disposed so as to face the rotary shaft, a back foil disposed at a radially outer side of the top foil, and a cylindrical bearing housing accommodating the top foil and the back foil. Engagement-projecting portions are provided on both ends of an inner circumferential surface of the bearing housing. Engagement notches engaging with the engagement-projecting portions are formed on both ends of the back foil.

Abstract: This relates to a radial foil bearing (3) that supports a rotating shaft (1). The radial foil bearing (3) is provided with a top foil (10), a back foil (11), and a bearing housing (12) that houses them. An engagement notch (15) that extends from the inner circumferential edge to the outer circumferential edge of the bearing housing (12) is formed at both sides of the bearing housing (12). An engagement protruding piece (30) that engages with each engagement notch (15) is provided at both side end portions of the back foil (11) on one side in the circumferential direction of the bearing housing (12).

Abstract: A thrust-bearing (1) disposed to face a thrust collar provided on a rotary shaft, including: grooves (5) formed at a bearing-surface (4b); a first-groove-group (6A) constituted by a plurality of first-spiral-grooves (6) formed at an inner circumferential side of the bearing-surface (4b); a second-groove-group (7A) constituted by a plurality of second-spiral-grooves (7) formed at an outer circumferential side more than the first-groove-group (6A) and wound in the same direction as the first-spiral-groove (6); and an annular-land-section (8) formed at the side, to which a fluid is drawn, among the inner circumferential more than the first-groove-group (6A) and the outer circumferential more than the second-groove-group (7A), wherein some of the first-spiral-grooves (6) of the first-groove-group (6A) and some of the second-spiral-grooves (7) of the second-groove-group (7A) are in communication with each other via a partial-communication-section (11), at least one side of which is in partial communication with th

Abstract: The radial foil bearing (3) for supporting a rotary shaft (1) includes a cylindrical top foil (10) disposed to face the rotary shaft (1), a back foil (11) disposed on a radially outer side of the top foil (10), and a cylindrical bearing housing (12) accommodating the top foil (10) and the back foil (11). The back foil (11) is formed in a cylindrical shape using at least one back foil piece (11a). The back foil piece (11a) includes peak portions (11c) and valley portions (11b) which are alternately formed in a circumferential direction of the top foil (10) and is fixed to the bearing housing (12) at an intermediate portion between both end portions in a circumferential direction of the back foil piece.