Nakaniwa
Akihiro Nakaniwa, Hyogo JP
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20100028148 | SEALING DEVICE FOR ROTARY FLUID MACHINE, AND ROTARY FLUID MACHINE - The invention provides a sealing device for a rotary fluid machine and a rotary fluid machine that reduce a decrease in efficiency and suppress swirling stall in a multistage rotary fluid machine. The sealing device includes a housing that rotatably accommodates a rotary shaft; a plurality of guide parts that extend along at least one of a radial direction and an axial direction of the rotary shaft and that impart flow velocity components in the rotation direction of the rotary shaft to fluid passing through therebetween; a partition part that connects ends of the plurality of guide parts and that serves as a partition between spaces between the plurality of guide parts and an outside space; a first seal part that is an annular protrusion extending in the radial direction, that forms a first gap with respect to the rotary shaft or the housing, and that blocks fluid flowing toward the plurality of guide parts; and a second seal part that is an annular protrusion, that forms a second gap with respect to the rotary shaft or the partition part, and that blocks fluid flowing through the outside space. | 02-04-2010 |
20110200439 | IMPELLER, COMPRESSOR, AND METHOD FOR PRODUCING IMPELLER - A hub is supported rotatably about an axis of rotation, and the diameter thereof increases from upstream to downstream sides along a fluid flow. A plurality of impeller blades extend radially outward from an outer circumferential surface of the hub. A shroud is formed in a cylindrical shape whose diameter increases from the upstream to downstream sides along the fluid flow and joins outer circumferential ends of the plurality of impeller blades. The impeller blades are composed of upstream blade segments and downstream blade segments bonded at a bonding surface extending in a direction substantially perpendicular to the axis of rotation. The upstream blade segments are integral with at least a portion of the shroud, and the downstream blade segments are integral with at least a portion of the hub. This improves the reliability and performance of an impeller and a compressor. | 08-18-2011 |
Akihiro Nakaniwa, Takasago-Shi, Hyogo JP
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20100119367 | SEALING DEVICE FOR ROTARY FLUID MACHINE, AND ROTARY FLUID MACHINE - The invention provides a sealing device for a rotary fluid machine and a rotary fluid machine capable of stabilizing the behavior of a rotary shaft in the rotary fluid machine. The sealing device includes: a housing that rotatably accommodates a rotary shaft; a plurality of guide parts that extend along at least one of a radial direction and an axial direction of the rotary shaft and that are arranged side-by-side in a circumferential direction of the rotary shaft; a partition part that serves as a partition between spaces between the plurality of guide parts and an outside space; a first seal part that is an annular protrusion, that forms a first gap with respect to the rotary shaft or the partition part, and that blocks a flow of fluid passing through the outside space; and a second seal part that is an annular protrusion extending in the radial direction, that forms a second gap with respect to the rotary shaft or the housing, and that blocks a flow of fluid that has passed through the spaces between the plurality of guide parts and a flow of fluid that has passed through the first seal part. | 05-13-2010 |
Akihiro Nakaniwa, Tokyo JP
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20120121432 | IMPELLER OF CENTRIFUGAL COMPRESSOR - Provided is an impeller of a centrifugal compressor including: a hub; a plurality of blades protruding from a surface of the hub, wherein a passage is formed by the hub and a blade being adjacent with the hub, so that a fluid, flowing in along an axial direction at an inner circumferential side in a radial direction, is flowed out toward an outer circumferential side in a radial direction; each of the plurality of blades includes a main body part and a leading edge, the main body part including a pressure side and a suction side; an angle between a component central line of the main body part and the axial direction increases from an inner end toward an outer end; and a radius of curvature at a central position, intersecting with the component central line of the leading edge, decreases from the inner end toward the outer end. | 05-17-2012 |
20120186605 | CENTRIFUGAL COMPRESSOR AND WASHING METHOD - The centrifugal compressor is provided with a casing, a rotating shaft which is supported inside the casing, an impeller which is arranged on the rotating shaft and rotates to compress a fluid, and a washing liquid injection device which injects a washing liquid into a flow path formed by the impeller and the casing. The washing liquid injection device is provided with a plurality of nozzles which are arranged along a circumferential direction of the rotating shaft to inject the washing liquid into the flow path and a plurality of chambers which communicate with each corresponding nozzle among the plurality of nozzles and supply the washing liquid to the corresponding nozzle. | 07-26-2012 |
20130164119 | SEAL STRUCTURE AND CENTRIFUGAL COMPRESSOR - Provided is a seal structure ( | 06-27-2013 |
20130251531 | ROTARY MACHINE - Provided is a rotary machine including: a shaft that rotates; a disc that has a substantially cylindrical hub fitted into the shaft and is provided so as to widen outward in a radial direction from a front end to a rear end of the hub; and an impeller having a plurality of blades provided on a surface of the disc. The hub has a tight fit section having an internal radius that is smaller than a radius of the shaft, and a loose fit section having an internal radius that is greater than the internal radius of the tight fit section. The loose fit section is provided on the front end side of the hub with respect to the tight fit section. | 09-26-2013 |
20130272895 | IMPELLER, ROTOR COMPRISING SAME, AND IMPELLER MANUFACTURING METHOD - An impeller is formed of two parts, i.e., an inner peripheral side part and an outer peripheral side part. The inner peripheral side part is molded in a cylindrical shape. The outer peripheral side part is formed by integrally molding an annular disc externally fitted to an outer peripheral surface of the inner peripheral side part, a plurality of blades provided at an interval in a circumferential direction on a surface that faces the other side in the axis line direction of the annular disc and forming al flow path extending in a radial direction, and a cover covering the plurality of blades from the other side in the axis line direction and having an insertion hole to which the inner peripheral side part is inserted in the axis line direction at an interval in a radial direction. | 10-17-2013 |
20140050585 | IMPELLER, ROTARY MACHINE INCLUDING THE SAME, AND METHOD FOR MANUFACTURING IMPELLER - An impeller including: blades disposed in a circumferential direction of the impeller; a disk located close to a second end side of an axis of the impeller with respect to the blades, to which the blades are attached, and configured to be attached to a rotating shaft; and a shroud located close to a first end side of an axis of the impeller with respect to the blades, and to which the blades are attached. Flow passages are formed by the blades, the disk and the shroud. The blades, the shroud and a first portion of the disk close to the second end side of the axis of the impeller are integrated so as to form a first member. A second portion of the disk close to the first end side of the axis of the impeller forms a second member. | 02-20-2014 |
20140064975 | IMPELLER AND ROTARY MACHINE PROVIDED WITH THE SAME - The present invention is related to an impeller and a rotary machine including an inner diameter portion, a disk portion, a blade portion, and a cover portion. The disk portion includes a main body portion provided the blade portion, and a fixing portion disposed at an inner side in a radial direction of the rotor than the main body portion and fitted at the outside of an outer peripheral surface of the inner diameter portion. The fixing portion is formed so as to protrude toward the other side in the axial direction from the main body portion. | 03-06-2014 |
20140175754 | SEAL DEVICE - A seal device including: three ring-shaped first vertical wall portions ( | 06-26-2014 |
20150139805 | ROTARY MACHINE - Provided is a rotary machine including: a shaft that rotates; a disc that has a substantially cylindrical hub fitted into the shaft and is provided so as to widen outward in a radial direction from a front end to a rear end of the hub; and an impeller having a plurality of blades provided on a surface of the disc. The hub has a tight fit section having an internal radius that is smaller than a radius of the shaft, and a loose fit section having an internal radius that is greater than the internal radius of the tight fit section. The loose fit section is provided on the front end side of the hub with respect to the tight fit section. | 05-21-2015 |
20150139806 | ROTARY MACHINE - Provided is a rotary machine including: a shaft that rotates; a disc that has a substantially cylindrical hub fitted into the shaft and is provided so as to widen outward in a radial direction from a front end to a rear end of the hub; and an impeller having a plurality of blades provided on a surface of the disc. The hub has a tight fit section having an internal radius that is smaller than a radius of the shaft, and a loose fit section having an internal radius that is greater than the internal radius of the tight fit section. The loose fit section is provided on the front end side of the hub with respect to the tight fit section. | 05-21-2015 |
20150139807 | ROTARY MACHINE - Provided is a rotary machine including: a shaft that rotates; a disc that has a substantially cylindrical hub fitted into the shaft and is provided so as to widen outward in a radial direction from a front end to a rear end of the hub; and an impeller having a plurality of blades provided on a surface of the disc. The hub has a tight fit section having an internal radius that is smaller than a radius of the shaft, and a loose fit section having an internal radius that is greater than the internal radius of the tight fit section. The loose fit section is provided on the front end side of the hub with respect to the tight fit section. | 05-21-2015 |
Kazuhide Nakaniwa, Minoo-Shi JP
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20150184353 | SYSTEM AND METHOD FOR PROVIDING INFORMATION TO OPERATOR OF PILE DRIVER - A system and method for precisely controlling an amount of tilt of a plumb pile or a batter pile without using two surveying instruments or a clinometer. The system for providing operational information to an operator of a pile driver | 07-02-2015 |
Kazuhide Nakaniwa, Osaka JP
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20090135401 | OPTICAL DEVICE, AND METHOD OF MEASURING THE DIMENSION OF OBJECT USING OPTICAL DEVICE - A device and a method for measuring the sizes of a remote object, for example, concrete crack, without using a high-place work vehicle or a ladder. An optical apparatus (e.g. a measuring device ( | 05-28-2009 |
20100095539 | OPTICAL DEVICE AND MEASURING METHOD - An optical device capable of measuring a condition such as deflection of a cylindrical body such as utility pole or cylindrical column precisely and rapidly is provided. The optical device has a telescope with a projection plate. The projection plate has a reference scale made of a plurality of full or substantially full circles arranged concentrically about a central axis of the telescope or a plurality of circular arcs arranged symmetrically about the central axis. | 04-22-2010 |
20110155886 | TRIPOD-SUPPORTING DEVICE, TRIPOD, SUPPORT MEMBER FOR TRIPOD AND METHOD FOR SUPPORTING TRIPOD - An attaching means composed of a hole or a groove is formed in the leg of a tripod or another member attached to the legs. A support member inserted in the attaching means is so disposed as to extend in a direction from the attaching means to the ground, toward which direction the tripod is liable to overturn. Therefore, overturning of the tripod can be reliably prevented by a simple operation. | 06-30-2011 |
Kunio Nakaniwa, Osaka-Shi JP
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20090321268 | Electrodeposited film having sliding function and coated article therewith - The present invention is an electrodeposited film substantially containing no lead, characterized by applying an alloy layer or a simple metal layer with an Hv value of not less than 60 to an under layer, and an alloy layer or a simple metal layer with an Hv value of not more than 40 to an upper layer. This electrodeposited film is harmless to the human body and the environment, and superior in sliding properties. | 12-31-2009 |
Tetsuya Nakaniwa, Tokyo JP
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20130069277 | RESIN COMPOSITION SHEET AND METHOD FOR MOLDING THEREOF - The object of the present invention is to provide a resin composition sheet that when used in the manufacture of product packaging such as carrier tapes, and the like, molding temperatures can be lowered from 260-280° C. to 200-250° C., even when heated to relatively high temperatures using a contact heating device with a mold-releasing film interposed therebetween, wherein poor appearance due to the replication of mold-releasing film features is unlikely to occur. The resin composition sheet relating to one aspect of the present invention comprises polycarbonate resin, amorphous polyester resin, and silicate compound filler. Furthermore, this resin composition sheet is suitable for use in the manufacture of product packaging such as carrier tapes, and the like. Furthermore, when an object that is vulnerable to static electricity is to be accommodated within product packaging, it is preferable to add a conductive filler to prevent the static charge in the accommodated product. | 03-21-2013 |