| Patent application number | Description | Published |
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| 20080237195 | WELDING SLOT SEALING STRUCTURE AND WELDING METHOD - Blades are connected to the surface of a disk and slots are formed in the surface of a shroud, which is opposite from the other surface of the shroud where the blades are to be welded. The blades are arranged on the opposite surface from the slots and a laser beam is applied from the surface in which the slots are formed, to weld the shroud and the blades. If powder is melted and put in the slots formed for welding in the shroud to fill the slots, thermal distortion occurs. On the other hand, if the slots are left empty, a problem of degrading the fluid performance arises. To solve these problems, components are installed on the surfaces of the slots on the opposite side from the blades after the blades and the shroud in which the slots are formed are welded. Alternatively, the slots are filled with a material different from that of the shroud, such as a resin. With this configuration, distortion caused by welding heat can be reduced without degrading the fluid performance. This method can be applied to the case where the blades are formed on the surface of the shroud, not on the surface of the disk, and to the slots formed in the disk after the blades and the disk are laser-welded. | 10-02-2008 |
| 20090035122 | CENTRIFUGAL COMPRESSOR, IMPELLER AND OPERATING METHOD OF THE SAME - A centrifugal compressor is equipped with an impeller having a blade angle distribution that makes it possible to achieve a relatively wide operating range. The blade angle of a shroud side facing a circular plate of a blade is termed a first angle and a blade angle of a hub side disposed at the circular plate is a second angle. The shroud side is formed in a curved shape having an angle distribution from a front area in a shaft direction toward a centrifugal direction in which the first angle is the local maximum point before a substantially middle portion and the local minimum point after the substantially middle point. The hub side is formed in a curved shape having an angle distribution from the front area in the shaft direction toward the centrifugal direction in which the second angle is the maximum local point before the substantially middle portion. | 02-05-2009 |
| 20090095719 | WELDING METHOD AND WELDING APPARATUS FOR AN IMPELLER - A welding method for an impeller having a plurality of blades, a disc and an exterior body including a shroud welded to the plurality of blades, comprising the steps of:
| 04-16-2009 |
| 20100129224 | CENTRIFUGAL COMPRESSOR - A centrifugal compressor provided with an impeller which is configured to have a plurality of blades arranged at a predetermined interval in a circumferential direction of a hub rotating together with a rotation shaft, in which a blade angle on a shroud side of the blade distributes to have a minimum value at a position between a leading edge of the blade and a midpoint of a camber line on the shroud side, and a maximum value at a position between the midpoint of the camber line on the shroud side and a trailing edge of the blade, and a blade angle of the blade on a hub side distributes so as to have a maximum value at a position between a leading edge and a midpoint of a camber line on the hub side. | 05-27-2010 |
| 20110097203 | TURBO MACHINERY - Turbo machinery comprising an impeller and a diffuser positioned on a downstream side of the impeller that a channel wall surface of the diffuser is composed of a pair of a shroud side diffuser plate and a hub side diffuser plate which surface each other and a channel width is formed so as to be increased downstream, characterized in that guide vanes in a circular arc shape lower in height than the channel width are installed in a line of a plurality of vanes on both channel walls of the shroud side diffuser plate and hub side diffuser plate of the diffuser, and a total of vane heights of the two guide vanes at an outlet of the diffuser is set so as to be within a range from 30 to 70% of the channel width at the outlet of the diffuser. | 04-28-2011 |
| Patent application number | Description | Published |
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| 20080279680 | Multistage Centrifugal Compressor - A multistage centrifugal compressor includes a rotary shaft, and multistage impellers attached to the rotary shaft. Each of the impellers includes a hub, a shroud and blades therebetween in a radial cascade arrangement. An annular suction passage for guiding the fluid flow from the inward radial direction to a blade inlet is disposed upstream of the centrifugal impeller. A diffuser is disposed downstream of the centrifugal impeller. A bend portion is disposed downstream of the diffuser, and a return channel with a guide blade portion is disposed downstream of the bend portion. The annular suction passage at a hub side includes an axial parallel portion. | 11-13-2008 |
| 20090281991 | PROVIDING SEARCH RESULTS FOR MOBILE COMPUTING DEVICES - Technologies are described herein for providing search results for mobile computing devices. Search results are retrieved based on a search term. Each of the search results is assigned to one or more categories. The categories and the assigned search results are provided to the mobile computing device. The mobile computing device is adapted to display each of the categories and a partial list of the search results for each of the categories. | 11-12-2009 |
| 20090317248 | CENTRIFUGAL COMPRESSOR HAVING VANELESS DIFFUSER AND VANELESS DIFFUSER THEREOF - In a high pressure centrifugal compressor, the occurrence of rotating stall noticeable in a comparatively-low specific speed wheel stage is prevented, thereby high efficient fluid performance is obtained and reliability is improved. The centrifugal compressor has a first vaneless diffuser with a constant flow channel height on the downstream side of an impeller, and a second vaneless diffuser in which the flow channel height decreases in a flow direction from an inlet to an outlet on the downstream side of the first vaneless diffuser. These diffusers are combined with an impeller using thick blades. | 12-24-2009 |
| 20100028141 | MULTISTAGE CENTRIFUGAL COMPRESSOR - In a multistage centrifugal compressor, a plurality of impellers is attached to the same rotary shaft. Vaned Diffusers and vaneless diffusers are used, as diffusers, for respective compressor stages configuring the compressor. The vaned diffusers are continuously used from the first compressor stage to the middle compressor stage, and the vaneless diffusers are used for the last compressor stage and the previous stage. While high efficiency is maintained at the compressor stages having the vaned diffusers, an operating flow range is secured at the compressor stages having the vaneless diffusers. | 02-04-2010 |
| 20100161631 | TECHNIQUES TO SHARE INFORMATION ABOUT TAGS AND DOCUMENTS ACROSS A COMPUTER NETWORK - Technologies are described herein for providing an improved interface for interacting with a document within a private computer network. A computer program provides a person profile interface through a document viewer, the person profile interface enabling a user of a private computer network to select a different user of the private computer network, and present person profile tags and documents associated with the different user of the private computer network. The computer program further provides a tag profile interface through the document viewer, the tag profile interface enabling the user to select a tag, and present content tagged or commented on by other users of the private computer network and associated with the selected tag. Other embodiments are described and claimed. | 06-24-2010 |
