Abstract: A current interruption device includes: a deforming plate configured to deform when the internal pressure of the casing rises above the predetermined level; a conducting plate which configures the current path; and a contact plate. The conducting plate includes a first contact portion configured to contact the contact plate. The contact plate includes a second contact portion configured to contact the first contact portion. The deforming plate includes a pressure receiving portion configured to receive the internal pressure of the casing and a contacting portion configured to contact the first contact portion. The second contact portion is configured to be separated from the conducting plate by deformation causing the contacting portion to move toward the contact plate. The deforming plate is insulated from the conducting plate and the contact plate. The conducting plate is disposed to be interleaved between the deforming plate and the contact plate.

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: A check valve (300) that opens and closes by causing a valve element (130) to come into contact with and separate from a valve seat (104) and thereby controls a flow of fluid that flows in through an inlet (101) and flows out through an outlet (102), having a guide portion (135) that has a fluid guide surface provided at a downside thereof, wherein the valve seat (104) has a first valve seat and a second valve seat, and the valve element (130) has a first valve portion (131) that is to be seated on the first valve seat, a second valve portion (132) that is to be seated on the second valve seat, and a pressure receiving surface (134) that extends between the first valve portion (131) and the second valve portion (132) in such a manner that a distance between the pressure receiving surface (134) and the first valve seat gradually reduces.

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 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 to restrict the movement of the bristle part. Such brush seal for sealing a fluid between the stationary part and the rotational part includes the bristle part formed by the multiple bristles such that the multiple bristles arranged in a direction of pressure difference between the high-pressure side and the low-pressure side are mutually fixed between a base end and a free end to form planar bristles, and these planar bristles are arranged continuously in layers in a circumferential direction to form a circular bristle part, wherein circumferential grooves are formed on the sliding surface of the bristle part on its free end side.

Abstract: A mechanical seal has a structure wherein a plurality of sealed-fluid-accommodating blocks separated in the circumferential direction are formed on either the sealing face of a fixed ring or the sealing face of a rotating ring so as to communicate with a sealed fluid accommodation space. Pumping parts for creating a pumping action due to the fixed ring and the rotating ring sliding while undergoing relative rotation are formed on a bottom part of the plurality of sealed-fluid-accommodating blocks. The pumping parts formed on the bottom parts of the plurality of sealed-fluid-accommodating blocks are provided with an intake pumping part which acts in a direction in which the sealed fluid is drawn in and a discharge pumping part which acts in a direction in which the sealed fluid is discharged.

Abstract: By randomly arranging dimples provided on a sealing face, a sliding characteristic is improved in a wide range of a bearing characteristic number on the sealing face. A pair of sliding parts in which a plurality of dimples is arranged on at least one of sealing faces that relatively slide on each other is characterized in that each of the plurality of dimples is provided independently from the other dimples, and arranged in such a manner that the plurality of dimples having different opening diameters is randomly distributed.

Abstract: A sliding component is characterized in that, on one sealing face of a pair of sliding parts that slide relative to each other, multiple positive pressure-generating mechanisms that include extremely shallow parallel grooves running roughly in parallel with the sealing face and having a submicron-level height difference are provided independently in the circumferential direction, and that the extremely shallow parallel grooves connect to the high-pressure fluid side, but are isolated from the low-pressure fluid side by a seal area. The sliding component can reduce a leakage rate of sealed fluid and significantly improve lubrication characteristics at startup or stop, while being actuated by means of fluid lubrication in a rotation phase, thereby achieving the effects of sealing and lubrication at the same time.

Abstract: A sliding component is characterized in that the sealing face of one of a pair of sliding parts that slide relative to each other is provided with a first pumping groove that is open to the high-pressure fluid side but isolated from the low-pressure fluid side by a seal area and also angled to discharge the fluid toward the high-pressure fluid side by sliding relative to the mating sealing face, as well as a second pumping groove that is open to the low-pressure fluid side but isolated from the high-pressure fluid side by a seal area and also angled to discharge the fluid toward the high-pressure fluid side by sliding relative to the mating sealing face, wherein the low-pressure fluid-side end of the first pumping groove is arranged adjacent to the high-pressure fluid-side end of the second pumping groove.

Abstract: A sliding component, which can seal and lubricate at the same time by reducing the amount of leakage of sealed fluid further while preventing torque increase and local wear, is characterized in that an extremely shallow step of circular shape is provided on a sealing face of one of a pair of sliding parts that slide against each other in such a way that the step is positioned on the low-pressure fluid side (atmosphere side) of this sealing face and also set lower than the sealing face, and that pumping grooves acting to push back toward the high-pressure fluid side (sealed fluid side) the fluid that tends to leak from the sealing face toward the low-pressure fluid side (atmosphere side) are provided on the surface of the extremely shallow step.

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: The object of the present disclosure is to accomplish a stable sealing performance while maintaining the durability. A mating ring (120) includes a sliding portion (121) having a sliding surface that slides against a sealing ring (110) within an end surface on an atmosphere side (A) thereof in an axial direction of a shaft (200), and a retained portion (122) that extends from a radially outward end portion of the sliding portion (121) toward a sealed-fluid side (F) in the axial direction and is retained by a sleeve (130). A mechanical seal (100) includes an annular holder (500) that is fixed to the sleeve (130) receives pressure from an O-ring (140) that receives, from the sealed-fluid side (F) in the axial direction, a fluid pressure (P) of a fluid to be sealed that flew into a space created by a flange portion (132) of the sleeve (130) and the retained portion (122) of the mating ring (120).

Abstract: By randomly arranging dimples provided on a sealing face, a sliding characteristic is improved in a wide range of a bearing characteristic number on the sealing face. A pair of sliding parts in which a plurality of dimples is arranged on at least one of sealing faces that relatively slide on each other is characterized in that each of the plurality of dimples is provided independently from the other dimples, and arranged in such a manner that the plurality of dimples having different opening diameters is randomly distributed.

Abstract: A check valve (100) that opens and closes by causing a valve element (112) to come into contact with and separate from a valve seat (104) and thereby controls a flow of fluid that flows in through an inlet (101) and flows out through an outlet (102). The check valve (100) has: the inlet (101) provided at a downside thereof; the outlet (102) provided at an upside thereof; the valve seat (104) formed to surround the inlet (101); the valve element (112) configured to be able to come into contact with and separate from the valve seat (104) vertically; and a guide portion (105) that has a fluid guide surface (118) horizontally guiding a fluid flowing in through the inlet (101), and a valve element guide surface (111) provided on a side surface thereof, the valve element guide surface (111) vertically guiding the valve element.

Abstract: A solar heat collection tube includes a center metal tube that allows a heat medium to flow therethrough, a glass tube that covers the outer circumference of the center metal tube to form an annular void between the glass tube and the center metal tube, and an absorber configured to absorb a difference in the thermal expansion between the center metal tube and the glass tube. The absorber has a connection cylinder and metal bellows. The metallic bellows are connected in series by the connection cylinder. The bellows are arranged to overlap in the radial direction with the connection cylinder located therebetween.

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 current interruption device includes a deforming plate, a contact plate and a conducting plate which configure a current path. The deforming plate includes one surface on an opposite side from the contact plate facing a first space, a pressure of which is retained to a same pressure as the internal pressure of the casing and the other surface opposed to the contact plate facing a second space, a pressure of which is retained to a same pressure as an external pressure of the casing. When the internal pressure rises above the predetermined level, the second contact portion is separated from the conducting plate by deformation of the deforming plate toward the contacting plate.

Abstract: In a stern tube sealing device, slurry contained in outboard water is suppressed from depositing on sliding portions between a wall surface of a seal ring chamber or an outer peripheral surface of a propeller shaft and a sealing surface of a seal ring. A first seal ring (121) is arranged in a first seal ring chamber (111), and a second seal ring (122) is arranged in a second seal ring chamber (112) which is formed at an inboard side of the first seal ring chamber. The first seal ring chamber and the second seal ring chamber are in communication with each other through the sliding portions between a wall surface of the first seal ring chamber and a sealing surface (121a) of the first seal ring. Outboard water is filled into the first seal ring chamber, and clear water is filled into the second seal ring chamber.

Abstract: The present disclosure provides a processing method for preparing at least one sliding part of a pair of sliding parts, and includes a processing step of forming a shallow groove within a range of depth from 0.05 ?m to 5 ?m on a sealing face of the sliding part by irradiating an ultrashort pulse laser to a part of the sealing face where a positive pressure generation groove and a negative pressure generation groove are formed and removing part of a surface of the sealing face, wherein an energy fluence of the ultrashort pulse laser used in the processing step is 0.5 J/(cm2·pulse) to 7 J/(cm2·pulse).

Abstract: A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.