Abstract: In an embodiment, a pair of sliding components that slide relative to each other is included. One of the sliding components is a stationary-side seal ring 2, and the other sliding component is a rotating-side seal ring 3. The seal rings 2 and 3 have sliding faces S2 and S3 extending radially, respectively, for sealing sealed fluid against leakage. The sliding faces S2 and S3 are provided with a static pressure groove 22 communicating with a sealing gas supply passage, and pumping grooves 5 capable of controlling the radial flow of sealing gas to a flow from the low-pressure fluid side to the high-pressure fluid side by relative sliding of the sliding faces. By controlling the radial flow of sealing gas at the sliding face, the amount of flow of the sealing gas flowing to the low-pressure fluid side is reduced to improve sealing performance.

Abstract: In an embodiment, in a slide component, a negative pressure generation mechanism 12 that generates negative pressure by relative rotational sliding of a stationary-side seal ring 5 and a rotating-side seal ring 3 is provided on a sealing face of one of the stationary-side seal ring 5 and the rotating-side seal ring 3, and at least the surface of the negative pressure generation mechanism 12 is covered by an adhesion-resistant material film 15. With the configuration, deposition of precipitates on a negative pressure portion of a sealing face can be inhibited.

Abstract: In a mechanical seal, a stationary-side seal ring (20) is disposed on the high-pressure fluid side of a rotating-side seal ring (21), and fixed to a housing (1) and has sliding surfaces (20a), (20c), and (20d) supporting a rotating shaft (2) in both a radial direction and a thrust direction. The rotating-side seal ring (21) is axially movably fitted by a bellows (25) fitted on the rotating shaft (2). The rotating shaft (2) has an outer peripheral surface (2a) contacting and sliding on the radial sliding surface (20a) of the stationary-side seal ring (20) to be supported radially. Thrust rings (10a) and (10b) are provided between the stationary-side seal ring (20) and the rotating shaft (2), for supporting the rotating shaft (2) in thrust directions. The mechanical seal can eliminate the need for an additional bearing and provide stable performance as a bearing.

Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.

Abstract: An accumulator includes a pressure container, a tubular bellows, a bellows cap divisionally defining a liquid chamber and a gas chamber in cooperation with the bellows. A stay provided with a through hole partitions the liquid chamber into a closed liquid chamber on a side of the bellows and an open liquid chamber on a side of the liquid pressure port. The bellows cap includes an elastic abutment part provided with an annular sealing part positioned around the through hole to face the through hole, a buffering part is positioned on a radially inner side of the sealing part, and communication passages always communicating with the through hole are formed in the buffering part of the elastic abutment part.

Abstract: In an embodiment, in a slide component, dynamic pressure generation grooves 10 are provided on a sealing face of at least one of a pair of slide parts 4, 7 so as to be isolated with no communication from the sealed fluid side and the leakage side by land portions R of both the sealing faces, and a plurality of independently-formed minute recessed sections 11 is provided at positions on the sealing face IS between the dynamic pressure generation grooves 10 and the leakage side, the positions being separated in the radial direction from the dynamic pressure generation grooves. The slide component can make the sealing faces fluid-lubricant and low frictional and prevent leakage of a sealed fluid and incoming of dust to the sealing faces at the time of normal operation.

Abstract: The invention provides a metal bellows type accumulator having an outer shell provided in its one end with a pressure introducing passage in an opening manner, an axially expandable metal bellows including peak portions directed to an outer side in a radial direction and trough portions directed to an inner side alternately in an axial direction, having an axially fixed end to the outer shell and separating an inner chamber of the outer shell into a pressure introducing chamber and a gas chamber charged with cushion gas, and a support member arranged in an inner periphery of the metal bellows, fixed to the outer shell and constructed by a cushioning member. A clearance in a radial direction between the trough portions of the metal bellows and the support member is smaller than a clearance in a radial direction between the peak portions of the metal bellows and the outer shell.

Abstract: An accumulator has a pressure vessel, a partition portion comparting an internal space of the pressure vessel into a gas chamber having sealed gaseous matter and a liquid chamber having introduced liquid, and a bellows connected to the partition portion. The partition portion is provided with a bellows connection portion connected to the bellows, a seal arranged in a liquid chamber side of the bellows connection portion, and a seal retention portion fixed to the bellows connection portion and retains the seal. The seal retention portion is constructed by a leaf spring which is elastically deformable in a part thereof, and is structured by integrally forming a fixed portion fixed to the bellows connection portion, and a retention portion retaining the seal. Accordingly, the accumulator can reduce the number of parts of a pressure fluctuation absorbing mechanism, can be easily assembled, and can reduce a parts cost.

Abstract: A brush seal having an annular shape, includes: a low-pressure-side plate including a low-pressure-side recessed portion radially recessed and circumferentially extending; a high-pressure-side plate including a high-pressure-side recessed portion positioned to face the low-pressure-side recessed portion, the high-pressure-side recessed portion being radially recessed and circumferentially extending; a brush body including a plurality of wire rods and supported between the low-pressure-side plate and the high-pressure-side plate; and a fixing member inserted into a space formed by the low-pressure-side recessed portion and the high-pressure-side recessed portion.

Abstract: In an embodiment, a slide component includes one slide part 5 provided, on a low-pressure side of a sealing face thereof, with a negative pressure generation mechanism 10 including a negative pressure generation groove 10. The negative pressure generation groove 10a communicates with a high-pressure fluid side and is separated from a low-pressure fluid side by a land portion R. Another slide part 1 is provided, in a sealing face thereof, with at least one interference groove 15 communicating with the high-pressure fluid side for producing pressure variations in a fluid in the negative pressure generation groove 10a. The at least one interference groove 15 has an end 15a on an inside-diameter side extending to a position to radially overlap the negative pressure generation groove 10a.

Abstract: An impact on the tips of peaks of a metal bellows on contact is reduced, and deformation of the tips of the peaks even on contact is reduced to a minimum. In a free length state of a metal bellows 10 in an early stage of incorporation without extension and contraction, valleys each turn around in a U shape in cross section, peaks each turn around in an arc shape in cross section, the peaks are each provided in a position offset with respect to the center of a pitch between valleys adjacent to the peaks on both sides, and of bellies connected to the peaks on both sides, at least bellies located on the offset side are provided with a constriction protruding inward of the metal bellows.

Abstract: A current interruption device includes a conductive plate and a first deformable plate. The conductive plate includes a center portion and a peripheral portion surrounding the center portion. An upper surface of the center portion is formed in a planar shape spreading in a first direction and a second direction orthogonal thereto in a conductive state. The peripheral portion includes an inclined portion extending outward from a boundary between the center portion and the peripheral portion. An upper surface of the inclined portion is inclined so as to increase a distance to the first deformable plate as the upper surface of the inclined portion becomes farther away from the center portion when the conductive plate and the first deformable plate are viewed along the first direction or the second direction in the conductive state.

Abstract: A mechanical seal has a stationary side seal ring and a rotating side seal ring in opposed sliding contact with the stationary side seal ring. One seal ring of the stationary side seal ring and the rotating side seal ring is disposed on a sealed fluid side and constitutes a slide bearing which supports the rotating shaft. The other seal ring is disposed on the opposite side to the sealed fluid side, and a pressing member is attached to the other seal ring for biasing the other seal ring in the axial direction to press sealing faces of both the seal rings.

Abstract: In an embodiment, a mechanical seal device has a mating ring (131) that rotates with a rotating shaft (101), as well as an opposing seal ring (133) that slidably contacts the mating ring (131), so as to seal between the rotating shaft (101) and a seal cover (105) fixed to an equipment main body (102); wherein the seal cover (105) is a split structure comprising at least a first seal cover (107, 108) and second seal cover (106), the first seal cover (107, 108) is detachably connected in the axial direction by leaving the second seal cover (106) free from it, and the seal ring (133) is connected to the first seal cover (107, 108) in a securely following manner.

Abstract: The concentration of a sealed fluid in the vicinity of a sliding face between a stationary-side seal ring and a rotating-side seal ring is prevented without increasing the number of components and without providing a large-scale external circulation device. A seal cavity includes a radial sliding bearing 11, 25 for supporting a rotating shaft 2, and a sealing means 4, 30 on the side opposite to a sealed fluid source of the radial sliding bearing 11, 25 in a rotation axis direction, for sealing a sealed fluid. Fluid introduction holes 20 are provided in the radial sliding bearing 11, 25 for connecting the sealed fluid source side and the vicinity of the sealing means 4, 30 on the high-pressure fluid side.

Abstract: In an embodiments, a slide component includes a pair of slide parts that relatively slide on each other, one of the slide parts being provided in a sealing face with fluid circulation grooves 10 that communicate with a high-pressure fluid side via inlet portions and outlet portions and are separated from a low-pressure fluid side by land portions, the other of the slide parts being circumferentially provided in a sealing face with a plurality of interference grooves 15, 16, 17, 20 for producing pressure variations in a fluid in the fluid circulation grooves 10, adjacent ones of the interference grooves 15, 16, 17, 20 being set to have different shapes.

Abstract: The inflow of an external fluid into a mounting hole of a displacement control valve can be prevented, and accumulated gas in the mounting hole due to the permeation leakage of high-pressure gas can be discharged to the outside. A displacement control valve 1 inserted and fitted in a mounting hole 3 provided in a casing of a device controlled in displacement includes a sealing lip 46. The sealing lip 46 is fitted in a fitting section 41 at an outer peripheral portion of the displacement control valve 1 on a side close to an entrance of the mounting hole 3. The sealing lip 46 has a lip portion 46b abutting on an inner peripheral surface of the mounting hole 3.

Abstract: In an embodiment, a sliding component includes a pair of sliding parts (a stationary-side seal ring 7 and a rotating-side seal ring 4) that relatively slide on each other and each have a sliding face S formed radially for sealing sealed fluid from leaking. The sliding face S of at least one sliding part is provided with dynamic pressure generation grooves 10 spaced in a non-communicating manner from the sealed-fluid side and the leakage side by lands R of both sliding faces, and is provided with fluid introduction holes 11 between leakage-side ends 10a of the grooves 10 and the leakage side, for communicating the grooves 10 and the leakage side. Each fluid introduction holes 11 is configured such that a dynamic-pressure-generation-groove-side opening 11a open to a corresponding one of the grooves 10 is axially displaced from a leakage-side opening 11b open to the leakage side.

Abstract: A current interruption device includes a first conductive member, a second conductive member, a first deformable member, a second deformable member, and a first seal member. The second conductive member is disposed at a position opposed to the first conductive member. A center portion of the first deformable member is fixed to the second conductive member. The second deformable member is disposed on a side opposite to the first deformable member relative to the second conductive member. The first seal member is disposed between the first conductive member and the second conductive member. A second seal member is disposed between the first conductive member and the casing. A gas permeability between the casing and the first conductive member is equal to or less than a gas permeability between the first conductive member and the second conductive member.

Abstract: In an embodiment, a sliding face of at least one sliding part of the pair of sliding parts is provided, along its entire circumference, with a trap groove 10 for trapping leakage fluid, located on a leakage side and spaced from the leakage side by a land. A dust entry reduction means 12 for reducing entry of dust from the leakage side while allowing passage of fluid is formed between lands of the pair of sliding parts on the leakage side of the trap groove 10. At the sliding faces of the pair of sliding parts sliding relatively, entry of dust from the leakage side as well as liquid leakage to the leakage side are suppressed.