Abstract: A capacity control valve includes: intake-side passages connecting an intake chamber that takes in fluid and a control chamber; a pressure-sensitive chamber formed midway along the intake-side passages; a liquid-refrigerant discharge valve that receives the pressure of the control chamber to open and close the intake-side passages; a pressure-sensitive body placed in the pressure-sensitive chamber, which extends to apply a biasing force to the liquid-refrigerant discharge valve in the direction of closing the valve, while contracting as the ambient pressure increases; and a solenoid that applies an electromagnetic drive force to control the main valve; wherein the pressure-sensitive body is supported on one side by the driving rod of the solenoid in a manner permitting relative motion, while connected on the other side to the liquid-refrigerant discharge valve, wherein the discharge valve structure and discharge flow passages for discharging liquid refrigerant are simplified.

Abstract: A sealing device is provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing and is characterized by including a plurality of inversely directed dynamic pressure generation grooves for creating an action whereby a sealed fluid attempting to leak out is pushed back. The plurality of inversely directed dynamic pressure generation grooves are provided in a circumferential direction to the inner peripheral surface of the floating ring, and thereby the amount of leaking of the sealed fluid is reduced and the center of the floating ring and the center of the rotating shaft are matched together.

Abstract: A sealing device that suppresses degradation of sealing properties resulting from conduction of heat generated by sliding of a resin-made sealing member and a rotating shaft to a rubber-made sealing member. The sealing device includes a rubber sealing member (110), a resin sealing member (120), a support ring (130), and a case (180), the support ring (130) has: a large diameter portion (131); an inward flange (135) that extends inwardly in a radial direction from an end portion of the large diameter portion (131) on an air side, and has a notch (135a) with which a nail portion (183) of the case is engaged; a small diameter portion (133) that is in contact with an inner peripheral surface of a lip portion (112) of the rubber sealing member (110); and a lip retaining portion (134).

Abstract: A rotary joint for maintaining a cryogenic supplying refrigerant comprises a vacuum use cylindrical shaft supported in rotatable condition, a rotary seal ring fitted to an outer circumferential face with a space, a stationary seal ring provided at both sides of the respective rotary seal rings, a resilient bellows to press the stationary ring resiliently to the rotary seal ring side, a spaced fluid passage formed between the respective resilient bellows, a second fluid passage communicating with the spaced fluid passage, a connecting fluid passage communicating with the second fluid passage, a first pipe communicating through the spaced fluid passage, a connecting cover having a suction bore for vacuumizing and a magnetic fluid seal device having a projection constituted as multiple gaps corresponding to a pressure of the vacuumizing.

Abstract: The present invention is to provide a brush seal device capable of following displacement in a radial direction of a rotational shaft appropriately. The brush seal device prevents leakage of process fluid, wear of a brush seal etc., and leakage of process fluid from an outer circumferential side. The brush seal device 100 of the present invention integrally includes an inner circumferential brush seal 120 and an outer circumferential brush seal 140. The inner circumferential brush seal 120 has a brush portion 123 and an inner-circumferential-side free end portion 125 at the inner circumferential side. The outer circumferential brush seal 140 has a brush portion 143 and an outer-circumferential-side free end portion 145 at the outer circumferential side.

Abstract: A metal bellows (110) for an accumulator (100) into which a hydraulic fluid is drawn in, has a bellows-shape in which ridge fold portions (110a) and valley fold portions (110b) are formed repeatedly with slope portions (110c) in between, wherein two of the slope portions (110c) that are adjacent to each other via a common ridge fold portion (110a) have: first slope portions (110c1) which extend from the common ridge fold portion (110a) and second slope portions (110c2) each of which extends from each of the first slope portions (110c1) such that a distance therebetween becomes much greater than the first slope portions (110c1) as the second slope portions (110c2) extend toward the adjacent valley fold portions (110b), wherein the first slope portion (110c1) and the second slope portion (110c2) are connected at an inflection point (P).

Abstract: Sliding parts of a pair of annular bodies include sealing faces that relatively slide on each other. A reversed Rayleigh step mechanism serving as a negative pressure generation mechanism is provided in at least one of the sealing faces, and a negative pressure generation groove that forms the reversed Rayleigh step mechanism is provided in an arc shape along the circumferential direction of the sealing face so as to be isolated from a high pressure fluid side and a low pressure fluid side by a land section.

Abstract: A lip seal-type shaft seal device that exhibits no leakage when at rest; operates under fluid lubrication and prevents leakage when rotating, including during initial rotation; and enables a balance between seal integrity and lubrication is provided. The device includes a plurality of discontinuous pumping areas for generating pumping action via the relative rotational sliding of a lip seal and a rotating member is formed in the circumferential direction on the outer circumferential surface of the rotating member. The plurality of pumping areas is provided with suction portion of pumping areas operating in a direction in which a sealed fluid is drawn in and discharge portion of pumping areas operating in a direction in which the sealed fluid is expelled. A lip of the lip of the lip seal extends in an axial direction towards an atmosphere side, leaving part of the pumping areas uncovered on a sealed fluid side.

Abstract: Provided is a mechanical seal that ensures the flow rate of a cooling fluid, which is necessary to cool a slide seal surface, and that can prevent erosion from occurring. In the mechanical seal, the ratio between the depth and the width of each groove of a partial impeller is 2.0-5.0; the ratio of the distance between the grooves of the partial impeller to the width of a weir of a casing is 0.5-3.1; the ratio of the total length of the widths of the grooves of the partial impeller to the total length of the peripheral surface of the partial impeller, in which the grooves are formed, is 0.28-0.8; or the ratio of the length of the projected portion of the tip of each groove of the partial impeller to the width of a cooling liquid discharging groove of the casing is greater than 0 and less than or equal to 0.65.

Abstract: A current interruption device includes a first conductive member, a second conductive member, a first deformable member, and a second deformable member. The first conductive member is fixed to a casing. The second conductive member is disposed at a position opposed to the first conductive member. The first deformable member is in contact with the second conductive member when pressure in the casing is equal to or less than a predetermined value. Further, the first deformable member is brought out of contact with the second conductive member when the pressure in the casing exceeds the predetermined value. A plastic deformation portion deformed in a manner of projecting toward the second conductive member is provided on a center portion of the second deformable member.

Abstract: A mechanical seal (100) includes a sleeve (130) fixed to a rotating shaft (200), wherein the sleeve (130) has: a first annular portion (131) that has a step having an inner diameter and an outer diameter on a sealed fluid (F) side thereof that are larger than those of on an opposite side thereto, an inner peripheral surface of a small diameter portion (131a) on the first annular portion (131) is fitted on the rotating shaft (200), and a stationary ring (110) is disposed on the small diameter portion (131a), a rotating ring (120) is disposed between a large diameter portion (131b) and an inner peripheral surface of the rotating ring (120) is sealed, S2÷S1?1 is satisfied where S1 is a sliding area between the stationary ring (110) and the rotating ring (120), S2 is a pressure receiving area where the stationary ring (110) receives a pressure effect of the rotating ring (120) due to a pressure of the sealed fluid (F).

Abstract: A mechanical seal having a seal cover that has a high versatility and is less prone to deformation even when secured to a housing by two bolts is provided. A mechanical seal 100 includes a rotating ring 40, a stationary ring 20, and a seal cover 10 to attach the stationary ring 20 to a housing 300. The seal cover 10 includes two U-shaped grooves 11 and two elongate holes 12 for bolting, which are disposed alternately and at regular intervals in a circumferential direction of the shaft hole, and elongate holes 12 are elongate in a radial direction of the shaft hole and innermost positions within the elongate holes 12 where bolt shanks can pass through are located further inward than innermost positions within the U-shaped grooves 11 where bolt shanks can pass through.

Abstract: A mechanical seal (100) is configured such that an annular sealed space (S1) is formed by a first bellows (141), a second bellows (151), and members respectively provided on both end sides of the first bellows (141) and the second bellows (151), and that the first bellows (141) and the second bellows (151) expand and contract in a central axial direction of a rotating shaft (200) in accordance with fluid pressure inside the sealed space (S1). The first bellows (141) and the second bellows (151) are arranged at positions distant to each other in the central axial direction, and are arranged such that a part of the first bellows (141) on a radially inward side and a part of the second bellows (151) on a radially outward side overlap when viewed in the central axial direction.

Abstract: A pair of sliding parts includes a plurality of dimples formed along a circumferential direction with substantially fixed width from a cavitation formation region on an upstream side of each of the dimples to a positive pressure generation region on a downstream side of each of the dimples. An upstream beginning end of the cavitation formation region is formed in a tapered shape from a low pressure fluid side toward a high pressure fluid side, and disposed so as to overlap a positive pressure generation region of the dimple arranged on the upstream side in a radial direction. A low pressure fluid side edge of the positive pressure generation region is formed in a tapered shape from the low pressure fluid side toward the high pressure fluid side and smoothly connected to a low pressure fluid side edge of the cavitation formation region.

Abstract: Even when a fluid discharge for discharging high-pressure fluid (sealed fluid) to a high-pressure side of a sealing face is provided, the disclosed sliding component prevents precipitation, adhesion and accumulation of a deposition-causing substance through a dehydration condensation reaction between the high-pressure fluid and low-pressure fluid on the sealing face, and also prevents occurrence of cavitation which would otherwise take place in association with a sudden pressure drop due to a discharge of fluid. Disclosed is a pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge for discharging fluid to a high-pressure fluid side, wherein a buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face S on a low-pressure side of the fluid discharge.

Abstract: A brush seal includes a bristle part formed by multiple bristles attached to a stationary part between the stationary part and a rotational part that undergo relative motion by maintaining a space in between; and a back plate attached adjacent to the bristle part on its low-pressure side to restrict the movement of the bristle part. The brush seal for sealing a fluid between the stationary part and rotational part is characterized in that the bristle part is formed by the multiple bristles such that the multiple bristles arranged in a direction of fluid are mutually fixed between a base end and a free end to form planar bristles arranged continuously in layers in a circumferential direction to form the bristle part.

Abstract: Even when a fluid discharge for discharging high-pressure fluid (sealed fluid) to a high-pressure side of a sealing face is provided, the disclosed sliding component prevents precipitation, adhesion and accumulation of a deposition-causing substance through a dehydration condensation reaction between the high-pressure fluid and low-pressure fluid on the sealing face, and also prevents occurrence of cavitation which would otherwise take place in association with a sudden pressure drop due to a discharge of fluid. Disclosed is a pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge for discharging fluid to a high-pressure fluid side, wherein a buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face S on a low-pressure side of the fluid discharge.

Abstract: To provide a mechanical seal in which degradation or tearing of a bellows does not occur, the spring constant of the bellows is reduced, and the fluctuation in the load due to stretching and contracting of the bellows is reduced. An inside-type mechanical seal includes a sleeve fixed to a rotating shaft, and a cartridge fixed to a housing. A rotation-side sealing ring is provided to the sleeve. A fixed-side sealing ring, which slides against the rotation-side sealing ring, and a bellows for axially urging the fixed-side sealing ring is provided to the cartridge. The bellows is made from a metal; and the metal bellows has one end fixed to a case for holding the fixed-side sealing ring and another end fixed to the cartridge. The plate thickness of the metal bellows is set so as to be smaller than the plate thickness of the case or the cartridge.

Abstract: A pumping ring 46 producing an axial flow of sealed flow is secured to a rotary shaft 6 at an axial position different from a rotary ring 56 so that the sealed fluid positioned in the sealed space 33 flows along the axial direction of the rotary shaft 6. A discharge hole 14 is formed on an inner circumferential surface of a seal cover 8 positioned in the downstream side of the axial flow of the sealed fluid resulting from a rotation of the pumping ring 46. An inflow hole 15 is formed in the upstream side of the axial flow of the sealed fluid resulting from the rotation of the pumping ring 46, so that the sealed fluid discharged from the discharge hole 14 returns to the inside of the sealed space from the inflow hole 15.

Abstract: A fluid is actively taken into sealing faces and discharged from the sealing faces to prevent concentration of sediment causative substances on the sealing faces and prevent generation of sediment while preventing leakage of the fluid taken into the sealing faces to a low pressure fluid side. A fluid circulation groove includes an inlet side section where the fluid comes in from a high pressure fluid side and an outlet side section where the fluid goes out to the high pressure fluid side in one of sealing faces of a pair of sliding parts that slide on each other. The fluid circulation groove is isolated from the low pressure fluid side by a land section. Groove width of the outlet side section of the fluid circulation groove is gradually expended toward an outlet end.