Eagle Industry Co., Ltd.

Eagle Engineering Aerospace Co., Ltd.

Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Yamabiko Corporation

Hitachi Systems, Ltd.

Mitsubishi Industries, Ltd.

Toru Kono

Wataru Kimura

Jun Hiromatsu

Yuichiro Tokunaga

Yoshiaki Takigahira

Hidetoshi Kasahara

Takafumi Ota

Ryu Kikuchi

Akira Urabe

Hideyuki Inoue

Shin Nishimoto

Hidekazu Uehara

Takeshi Hosoe

Takumi Nonaka

Genichi Sato

Tetsuya Iguchi

Azumi Yoshida

Kohei Ozaki

Yoshihito Narita

Shirou Yamaguchi

Kentarou Oonishi

Naoya Tatsumi

Minoru Kaneko

Yasuhiro Kuroki

Daisuke Katsumata

Norihiko Saito

Yuta Iihara

Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes inclined grooves formed at a sliding surface so as to be arranged in a circumferential direction, the inclined grooves being open on an outer diameter side of the seal ring to generate a drawing pressure. The seal ring further includes supply grooves being open on a sealed fluid side of the seal ring and extending in a radially outward direction toward inner diameter sides of the inclined grooves.

Seal ring

A seal device is configured so that seal properties can be held over a long period of time. A seal deviceinserted into and disposed between grooves each formed at first and second components which are adjacent to each other and collectively form a housing structure includes a first seal member inserted into the groove of the first component, a second seal member inserted into the groove of the second component, and a partitioning member extending between the first and second seal members to partition a space between the grooves of the first and second components and arranged movably relative to the first and second seal members.

Seal device

Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes multiple static pressure grooves provided at a sliding surface of the seal ring and arranged in a circumferential direction, the static pressure grooves being opened on a sealed fluid side and closed on an outer diameter side, a circumferential length of each of the static pressure grooves being shorter than a radial length of each of the static pressure grooves.

Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes; inclined grooves formed at a sliding surface so as to be arranged in a circumferential direction, the inclined grooves being closed on an outer diameter side thereof and configured to generate a dynamic pressure; and supply grooves opening on a sealed fluid side and communicating with an inner diameter side of the inclined grooves.

Provided is a seal ring configured so that a fluid film can be formed between sliding surfaces across a wide range of rotation speed and configured with high lubricity. A seal ring for sealing a clearance between a rotary shaft and a housing includes, dynamic pressure grooves formed at a sliding surface of the seal ring and having positive pressure generators and negative pressure generators, and static pressure supply paths formed at the sliding surface of the seal ring to extend from an inner diameter side to an outer diameter side and to open on a sealed fluid side. Each of the positive pressure generators, each of the negative pressure generators, and each of the static pressure supply paths are arranged in description order in a circumferential direction of the sliding surface.

A segment seal is configured to seal an annular clearance between a housing and a rotary shaft in a state in which a pair of seal rings are attached in an unrotatable state between one end portion of the housing and a support member attached to the housing so as to be opposite to the one end portion in an axial direction. The segment seal includes an anti-rotation member placed not to rotate relative to the housing or the support member, provided with a pair of raised portions fitted to the pair of seal rings to prevent rotation of the pair of seal rings, and configured such that at least one of the raised portions has a shape fittable only to either one of the seal rings.

Segment seal

Provided is a brush seal in which the leakage of a sealed fluid is small. The brush seal includes: a brush formed of a bunch of a plurality of bristles; and an annular back plate arranged at a low-pressure side of the brush and provided with a plurality of grooves into which a sealed fluid is to be introduced. In the brush seal, the plurality of grooves are inclined with respect to a circumferential direction of the back plate and with respect to an extending direction (B) of the brush.

Brush seal

A seal segment includes a retainer extending in a circumferential direction of a rotary shaft on an outer circumferential side of the rotary shaft; a first seal body which has a plurality of first thin plate seal pieces extending inward in a radial direction from the retainer and laminated in the circumferential direction; a high-pressure side plate; a low-pressure side plate; and a second seal body having a plurality of second thin plate seal pieces which are laminated at an end portion of the retainer in the circumferential direction, extend inward in the radial direction, and have fluttering resistance higher than the first thin plate seal piece. The high-pressure side plate and the low-pressure side plate cover at least a part of the second seal body in the circumferential direction.

Seal segment and rotary machine

Provided is a split type brush seal device, brush seal pieces, and a method of assembling a split type brush seal device in which the brush seal pieces can be applied to an attached portion having an acceptable curvature. The split type brush seal device includes plural brush seal pieces having bundled wire rods, and attached members in which the plural brush seal pieces are attached to attached portions in the circumferential direction. Each of the brush seal pieces has a plate of arc shape to which the bundled wire rods are fixed. The split type brush seal device further includes a biasing member that forcibly cause a curvature of the plate to approximate to a curvature of the attached portion.

Split type brush seal device, brush seal pieces, and method of assembling split type brush seal device

To optimize fuel supply of an engine with a carburetor during engine operation, a throttle opening degree detection sensor detecting a throttle opening degree and a control unit controlling a valve body variably controlling an opening degree of a fuel discharge part or a fuel supply passage based on a map are included. The map includes a plurality of sections divided based on the throttle opening degree and an opening degree of the valve body set for each section. The opening degree of the valve body set for each section is the opening degree of the valve body at which the engine rotation speed is highest in each section. The control unit controls an electric actuator driving the valve body to achieve the opening degree of the valve body set in a section to which the throttle opening degree detected by the throttle opening degree detection sensor belongs out of the plurality of sections.

Portable working machine including engine with carburetor and fuel supply control method thereof

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.

A photovoltaic inspection system is provided, the photovoltaic inspection system detecting a failure by eliminating ON/OFF operation of a switch or others at the time of inspection or checkup as much as possible, reducing an influence of a temperature distribution as a whole with a small effort, and detecting a local deterioration in a photovoltaic module or string. According to a typical embodiment, in a photovoltaic system having a plurality of photovoltaic strings formed of one or a plurality of photovoltaic modules arranged to be aligned, a photovoltaic inspection system which detects the failure in the photovoltaic strings includes: a current detector which measures each of a first output current of a first photovoltaic string and a second output current of a second photovoltaic string; and a monitoring unit which calculates a second temperature property of the second photovoltaic string based on a value of the first output current and a value of the second output current and which determines whether the second photovoltaic string has the failure or not based on the second temperature property.

Photovoltaic inspection system and photovoltaic inspection method

A leaf seal device having a connection holding section of a sealing plate which is bent at a first bending section. A plurality of laminated sealing plates are engaged sequentially at the first bending section. An inclined face at an inner circumferential side of the connection holding section, a pitch and a space of a sealing section are changed.

Leaf seal device

The present invention provides a leaf seal device which is available to assemble easily and to control and to set an inclination angle and a space of a sealing section. In the leaf seal device of the present invention, a connection holding sectionof a sealing plateis bent at a first bending section. Thereby, since laminated a plurality of sealing platesare engaged sequentially at the first bending section, a radial direction is defined so as to become easily assemble. Also, according to inclining a faceat an inner circumferential side of the connection holding section, a pitch and a space of a sealing sectionare changed. Therefore, the space of the sealing section can be controlled, if controlling a bend angle of the first bending section

Primary objective of the present invention is to effect a seal against a variable clearance formed between assembly components which admit flows of high temperature fluids or are subjected to vibrations. Another objective is to reduce manufacture cost thereof. The seal device is comprised of seal strip, seal strip assemblage and a joint section, wherein the seal strip retains a first seal end section at one distal end of a thin seal base strip and a second seal end section at the other distal end of said seal base strip, wherein the seal strip assemblage arranges a plurality of said seal strips and retains a first outer circumferential seal face and a second outer circumferential seal face, the first outer circumferential seal face being disposed at the outer circumference of the first seal end section, the second outer circumferential seal face being disposed at the outer circumference of the second seal end section, wherein the joint section connects the seal strip assemblage so as to form an integral structure.

Growing community of inventors

Tokyo, Japan

Toru Kono