Abstract: An axial seal structure includes a high-pressure-side regulating member configured to regulate the flow of a fluid from a high-pressure-side region to multiple thin sheet seal pieces arranged with a minute gap between each of the multiple thin sheet seal pieces in a circumferential direction along a high pressure side of the multiple thin sheet seal pieces and along an outer peripheral surface of a rotating shaft. The high-pressure-side regulating member has multiple wires that are flexible. Respective longitudinal directions of the multiple wires are directed towards a direction having a radial component of the rotating shaft. Tips that are radial inner ends of the wires form free ends, and are in close proximity to or in contact with the outer peripheral surface of the rotating shaft. The wires that are adjacent to each other in the circumferential direction come into contact with each other partially in the longitudinal directions.

Abstract: A steam turbine facility is provided which is capable of appropriately sealing a gap between members made of cast material of Ni-based alloy even under the steam-temperature condition of 650° C. or higher, and which includes a first member and a second member whose base material is formed of cast material composed of at least one of Ni-based alloy, austenite steel, or high-chrome steel, form a space where the steam of 650° C. or higher flows. Between the first member and the second member, a metal gasket is provided which has a plurality of portions in line contact with the first member and the second member. On the first member and the second member, a first high-hardness layer which is harder than the base material, is provided at least in a portion where each of the first member and the second member is in line contact with the metal gasket.

Abstract: A shaft sealing device is provided in an annular space between a rotor and a stator surrounding an outer periphery of the rotor, and divides the annular space in the direction of an axis of the rotor into a high-pressure region and a low-pressure region. The shaft sealing device includes a seal body obtained by stacking a plurality of thin plate sealing pieces in a circumferential direction of the rotor; and a high-pressure side plate that extends from the stator toward the radial inner side so as to run along the high-pressure side of the seal body, and is segmented into a plurality of portions in the circumferential direction, and includes a rigidity imparting member configured to impart rigidity in the direction of the axis to a portion of the surface of the high-pressure side plate that faces the high-pressure region.

Abstract: A steam turbine facility is provided which is capable of appropriately sealing a gap between members made of cast material of Ni-based alloy even under the steam-temperature condition of 650° C. or higher, and which includes a first member and a second member whose base material is formed of cast material composed of at least one of Ni-based alloy, austenite steel, or high-chrome steel, form a space where the steam of 650° C. or higher flows. Between the first member and the second member, a metal gasket is provided which has a plurality of portions in line contact with the first member and the second member. On the first member and the second member, a first high-hardness layer which is harder than the base material, is provided at least in a portion where each of the first member and the second member is in line contact with the metal gasket.

Abstract: A shaft sealing device and a rotary machine equipped therewith are provided with a sealing body configured by stacking a plurality of thin sealing pieces; and a low-pressure-side side sealing plate in which a plate surface facing the low-pressure side is pressed against an inner wall surface of the housing facing the direction of the axis by means of the pressure of a fluid applied from a high-pressure side to the low-pressure side. A protrusion for blocking a downward flow toward the inside of the low-pressure-side side sealing plate in the radial direction along the low-pressure side of the sealing body is formed on the inside of the low-pressure-side side sealing plate in the radial direction, and a communication path for guiding the downward flow blocked by means of the protrusion to a low-pressure-side region is formed on the housing.

Abstract: Provided is a shaft sealing apparatus, which includes a seal ring that is installed in an annular space between a rotor and a stator surrounding an outer circumference side of the rotor, that is formed in a divided structure from a movable seal ring and a stationary seal ring whose circumferential ends are adjacent to each other, and that is configured so that the movable seal ring is biased toward a radial outer side thereof by an elastic body, a seal body that is formed by stacking a plurality of thin seal pieces, which extend from the seal ring toward a radial inner side of the rotor, in a circumferential direction of the rotor, and a communicating part that causes the low-pressure side region and the high-pressure side region to communicate with each other.

Abstract: An inner wall surface of a low-pressure-side side plate opposite to a lateral surface of a thin plats is formed along a direction crossing an axial direction of a rotating shaft such that a gap between the inner wall surface and the thin plate gradually decreases from a radially inner side toward a radially outer side of the low-pressure-side side plate.

Abstract: A shaft seal structure capable of preventing a seal body of the shaft seal structure of a rotation body from being held in an inclined posture even when the seal body is inclined is provided. It includes, an accommodation body (9), a seal body (12) including thin plate seal pieces (20), and a plate body (17) covering one end in the axial direction (20d) of the seal body (12). A recessed portion (31) recessing in the axis direction, and a protruding portion projecting to the other side from the recessed portion (31) are formed on one of the plate surface (17c) of the plate body (17) and the inner wall surface (9e) of the accommodation body (9). When the protruding portion abuts the other side and a pocket (X), the recessed portion (31) communicates with the pocket (X) and the fluid low pressure region.

Abstract: A shaft seal that is constituted by annularly arranging a plurality of seal segments in the circumferential direction of a rotating shaft, in which each seal segment has a plurality of thin plates that are provided in a predetermined arrangement in the circumferential direction of the rotating shaft, side plates that sandwich the plurality of thin plates from both sides thereof in the axial direction, and retention rings that retain the base ends of the plurality of thin plates and the base ends of the side plates; the distal ends of the thin plates protrude farther toward the rotating shaft than the distal ends of the side plates, and the protrusion length of the distal ends of the thin plates in the vicinity of the end portions in the circumferential direction where adjacent seal segments are connected is set to be less than the protrusion length of the distal ends of the thin plates that are located at the middle of the seal segment in the circumferential direction.

Abstract: An axial seal structure includes a high-pressure-side regulating member (30) that regulates the flow of a fluid from a high pressure side to multiple thin sheet seal pieces (20) arranged with minute gaps from each other in the circumferential direction along the high pressure side of the multiple thin sheet seal pieces (20) and along an outer periphery of a rotating shaft (6). The high-pressure-side regulating member (30) has flexible multiple wires (35). Longitudinal directions of the multiple wires (35) are directed towards a direction having a radial component of the rotating shaft (6). Tips (35b) that are radial inner ends of the wires form free ends, and are brought into close proximity to or into contact with the outer peripheral surface of the rotating shaft (6). The wires (35) that are adjacent to each other in the circumferential direction come into contact with each other partially in the longitudinal directions.

Abstract: Provided is a method of fabricating a shaft sealing device, in which a plurality of thin plate pieces arranged in a circumferential direction of a rotation shaft are provided and base ends of the thin plate pieces are mutually connected, the method including a stacking step of stacking the plurality of thin plate pieces in one direction, a connecting step of mutually connecting the base ends of the plurality of stacked thin plate pieces to form a stacked body, and a first smoothing step of bringing one lateral end surface of two lateral end surfaces of the stacked body formed by each end portion in a width direction of the plurality of thin plate pieces in contact with a flat surface to smooth the other lateral end surface.

Abstract: There is provided a shaft seal device comprising a seal piece-laminated body (12) where a plurality of thin seal pieces (20) are laminated in the circumferential direction along a rotating shaft, outer ends of the plurality of thin seal pieces in the radial direction are connected to each other, inner ends (20b) of the thin seal pieces in the radial direction are formed as free ends, a small gap (s) is formed at every two thin seal pieces adjacent to each other, and a small gap (s) is formed between the rotating shaft and the seal piece-laminated body (12). A wear-resistant treatment layer (25) is formed on the surface of a portion of the thin seal piece close to the inner end.

Abstract: A shaft seal that is constituted by annularly arranging a plurality of seal segments in the circumferential direction of a rotating shaft, in which each seal segment has a plurality of thin plates that are provided in a predetermined arrangement in the circumferential direction of the rotating shaft, side plates that sandwich the plurality of thin plates from both sides thereof in the axial direction, and retention rings that retain the base ends of the plurality of thin plates and the base ends of the side plates; the distal ends of the thin plates protrude farther toward the rotating shaft than the distal ends of the side plates, and the protrusion length of the distal ends of the thin plates in the vicinity of the end portions in the circumferential direction where adjacent seal segments are connected is set to be less than the protrusion length of the distal ends of the thin plates that are located at the middle of the seal segment in the circumferential direction.

Abstract: A shaft seal device that seals between the outer peripheral surface of a rotating shaft and a stationary member that is provided on the outer peripheral side of the rotating shaft, provided with a thin-plate seal that has a plurality of thin plates that are arranged in the circumferential direction of the rotating shaft and an abradable seal that is arranged at a position differing with the thin-plate seal in the axial direction, and having a free-cutting material that is disposed at either one of the rotating shaft and the stationary member, and a seal fin that projects toward the rotating shaft or stationary member from the other of the rotating shaft and the stationary member.

Abstract: In a shaft sealing mechanism which prevents fluid from flowing in an axial direction of a rotor through an annular gap between the rotor and a stator, there are provided a high pressure side plate positioned on a high pressure side region of a plurality of sheets, and a low pressure side plate positioned on a low pressure side region of the plurality of sheets, and construction is such that in a state in which the plurality of sheets is fixed on a stator side, and when under gas pressure, the sheets make contact with each other.

Abstract: A leaf seal as a shaft seal mechanism is made compact and enables reduction of manufacturing cost. Plural thin plates 29 lapped one on another in layers have their outer circumferential proximal ends fixed to each other by welding so that an annular thin plate assembly 29A having flexibility is formed. This thin plate assembly 29A is bent and assembled to form the leaf seal 25.

Abstract: A shaft sealing mechanism of an annular shape having at least one divided portion, which is installed in an annular space between a rotor and a stator, includes a group of thin plates. Outer peripheral ends of the thin plates are joined, and inner peripheral free ends come in contact with the rotor in a sliding manner so that a surface of the rotor and the thin plates form an acute angle to partition the annular space into a high-pressure region and a low-pressure region without being joined. At least a low-pressure gap near the divided portion is set to be larger than a low-pressure gap in a circumferential direction other than near the divided portion.

Abstract: A shaft seal mechanism (leaf seal) by which a desired seal performance can be stably obtained is provided. The shaft seal mechanism comprises a concave groove 71 formed larger than a minimum size of a plate width of thin plates 29 and a fitting piece 61 fitted in a gap between the concave groove 71 and a leaf seal 25. The leaf seal 25 comprises an annular thin plate assembly 29A constructed by the thin plates 29 and a plate spring 56 integrally formed therewith supporting the annular thin plate assembly 29A to be levitated coaxially with a rotating shaft 23. The thin plates 29 have their outer circumferential proximal end side made movable relative to the concave groove 71. A shaft seal mechanism assembling structure is also provided comprising a pressure receiving surface 61b and a lower pressure side plate 54 forming a predetermined gap size between the pressure receiving surface 61b and one side edges of the thin plates 29.

Abstract: There is provided a shaft sealing mechanism in which, even in a case where eccentricity occurs in a parent machine, flutter behavior of the sheets can be reliably prevented, the sheets can be prevented from failing due to fatigue, and also a long life and reliability of the shaft sealing mechanism can be improved. In a shaft sealing mechanism which prevents fluid from flowing in an axial direction of a rotor through an annular gap between the rotor and a stator, there are provided a high pressure side plate positioned on a high pressure side region of a plurality of sheets, and a low pressure side plate positioned on a low pressure side region of a plurality of sheets, and the construction is such that in a state in which the plurality of sheets is fixed on the stator side, and when under gas pressure, the parts make contact with each other.

Abstract: An object of the present invention is to provide a shaft seal which reduces the leakage of gas from the high pressure side to the low pressure side, and has excellent corrosion-resistance, and a gas turbine which is equipped with the shaft seal; in order to achieve the object, the present invention provide a shaft seal comprising a plurality of flexible thin plates having width in the axial direction of a rotary shaft, tips thereof sliding against a peripheral face of said rotary shaft, and outer peripheral bases thereof being secured to a casing side maintaining a gap therebetween, said thin plates being laminated in the peripheral direction of said rotary shaft, enabling the outer periphery of said rotary shaft to be sealed, an acute angle being formed between the thin plates and the peripheral face of said rotary shaft; and a low pressure side side-plate and a high pressure side side-plate which are provided on both sides of said thin plates in the axial direction of said rotary shaft, wherein it further c