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| Number | Title | Issue Date |
| 7758311 | Part span shrouded fan blisk Including a disk, a plurality of circumferentially spaced apart airfoils extending radially outwardly from the disk, a plurality of shroud segments being disposed circumferentially between the plurality of airfoils and configured to attach to a corresponding airfoil... | 07/20/2010 |
| 7322796 | Turbine vane construction A method for forming a component for use in a gas turbine engine, such as a turbine vane construction is provided. The method broadly comprises the steps of: forming a first aerodynamic structure having a first platform with a leading edge and a trailing edge, and a... | 01/29/2008 |
| 7300253 | Gas turbine blade or vane and platform element for a gas turbine blade or vane ring of a gas turbine, supporting structure for securing gas turbine blades or vanes arranged in a ring, gas turbine blade or vane ring and the use of a gas turbine blade or vane ring The invention relates to a gas turbine blade or vane ring having a supporting structure and gas turbine blades or vanes secured to it. The gas turbine blades or vanes have a blade or vane root, which is successively adjoined by a platform and then a blade profile wh... | 11/27/2007 |
| 7267530 | Windmill apparatuses and methods of mounting blades to enhance their performance A windmill apparatus has multiple pairs of blades to enhance power output and lift performance. The apparatus has multiple double acting piston/cylinders actuated by the windmill, which includes several clutches that are used to engage and disengage the windmill fro... | 09/11/2007 |
| 7165943 | Geothermal turbine A geothermal turbine comprises a turbine casing, a turbine rotor shaft, a plurality of nozzle diaphragm outer rings fixed to the turbine casing, a plurality of nozzle diaphragm inner rings located radially inside the nozzle diaphragm outer rings, a plurality of nozz... | 01/23/2007 |
| 7140841 | Rotor blade connecting arrangement for a turbomachine A connecting arrangement for rotor blades of a turbomachine includes projections (2), which extend in circumferential direction (3), are rigidly connected in pairs to a rotor blade and are respectively supported on the adjacent projection (2) by... | 11/28/2006 |
| 7104752 | Braided wire damper for segmented stator/rotor and method The segments of the vanes of a stator and the blades of a rotor for a gas turbine engine are dampened by utilizing braided wire cable that is affixed to adjacent segments such that each of the wire strands forming the cable is allowed to move relative to each other ... | 09/12/2006 |
| 7070388 | Inducer with shrouded rotor for high speed applications An inducer rotor rotatably mountable in an inducer for pressurizing fluid traveling through the inducer. The inducer rotor includes a hub. The hub has a central axis and a plurality of blades extending radially outward from the hub. Each blade extends from a root po... | 07/04/2006 |
| 7011496 | Ring unit for decreasing eddy flow area of a fan module A fan device for decreasing eddy flow area includes a fan module and a ring unit. The fan module has a fan rotor and a motor stator set and the fan rotor is movably connected to the motor stator set. The motor stator set has a guide flow device, which provides a plu... | 03/14/2006 |
| 6905309 | Methods and apparatus for reducing vibrations induced to compressor airfoils A method enables a rotor blade for a gas turbine engine to be fabricated. The method comprises forming an airfoil including a first side wall and a second side wall that each extend in radial span between an airfoil root and an airfoil tip, and wherein the first and... | 06/14/2005 |
| 6814543 | Method and apparatus for bucket natural frequency tuning A method of modifying a rotor blade, and a rotor blade are provided. The rotor blade is for a steam turbine and it is modified to facilitate altering a natural vibratory frequency of the rotor blade, the rotor blade includes a leading edge, a trailing edge, a first ... | 11/09/2004 |
| 6682306 | Moving blades for steam turbine The moving blades are configured so as to meet a condition: (L+3D)×fࣙ14,500 or L×(L+D)×f2ࣙ1.55×10.sup.7, where L is an effective length of the moving blade measured in inches, D is a blade root circle diameter of the moving blades ... | 01/27/2004 |
| 6520741 | Turbomachine blade The object of the invention is to improve the efficiency of a turbomachine blade provided with a reinforced hole for accommodating a damping element. To this end, the raised end faces (12, 13) of the marginal region (11), reinforced toward the hole (10), ... | 02/18/2003 |
| 6406263 | Gas turbine shaft pilot system with separate pilot rings A turbine assembly comprising a first rotatable component having a first lip with a first axial facing surface and a second rotatable component having a second lip with a second axial facing surface. The components are held together by an axial load so th... | 06/18/2002 |
| 6217283 | Composite fan platform A platform for a turbofan gas turbine engine that does not limit the rotation capability of adjacent fan blades in the event one of the fan blades is impacted by a foreign object. The platform includes a structural body portion and an integrally formed fl... | 04/17/2001 |
| 6082970 | Vibration attenuation arrangement for rotor blades An arrangement for attenuating vibrations of blades attached to a peripheral surface of a rotor of an axial turbine. A through hole is formed in each rotor blade in a generally thickness direction of the blade so that the through holes in combination defi... | 07/04/2000 |
| 6022193 | Propeller assembly for an underwater device In an underwater device adapted to sink in water, the device having a proler disposed in a tail cone portion thereof and operable to rotate in a first direction to move the device toward a surface of the water, an assembly for preventing the propeller fr... | 02/08/2000 |
| 6004102 | Turbine blade for use in the wet steam region of penultimate and ultimate stages of turbines A turbine blade which is provided for use in a wet steam region of penultimate and ultimate stages of turbines and is subject to erosive wear caused by impinging water droplets, is treated in a region of leading edges and parts of a blade leaf in such a w... | 12/21/1999 |
| 5984638 | Turbomachine radial impeller vibration constraining and damping mechanism A compressor blade vibration reduction mechanism for a high-speed radial impeller for minimizing fatigue failures from various excitation sources. The vibration reduction mechanism includes a plurality of loose-fitting lashing pins coupling each impeller ... | 11/16/1999 |
| 5695323 | Aerodynamically optimized mid-span snubber for combustion turbine blade An aerodynamically optimized mid-span snubber for combustion turbine blades provides sufficient stiffness to ameliorate vibratory stress but does so with minimal degradation of aerodynamic performance. The snubber has an optimized aerodynamic cross-sectio... | 12/09/1997 |
| 5599165 | Friction damper for gas turbine engine blades A friction damper (50) provides friction damping for gas turbine engine airfoils to reduce vibrations thereto. The friction damper (50) includes a plate (52) underlying radially outer shrouds (30) of two adjacent airfoils (20). Friction generated between ... | 02/04/1997 |
| 5540551 | Method and apparatus for reducing vibration in a turbo-machine blade Vibration in the blade of a turbo-machine is suppressed by the incorporation of both inner and outer restraints that inhibit deflections of the blade foils. The outer restraint comprises shroud, welded lugs or tie wires that divide the row of blades into ... | 07/30/1996 |
| 5498136 | Fluid machinery having blade apparatus and blade apparatus for fluid machinery The total number (M) of plural blades of a blade apparatus is selected so as not to be a prime number and not to be a power multiplier of a prime number. Plural blades are divided into at least a first blade group in which one blade group has the blades o... | 03/12/1996 |
| 5299915 | Bucket for the last stage of a steam turbine A last-stage steam turbine bucket having a profile according to Charts I-XXXXI of Table I. The bucket is divided into a number of profile sections each of which is a predetermined radial distance from the root section. Each point on a profile section at t... | 04/05/1994 |
| 5288209 | Automatic adaptive sculptured machining An improved method of adaptive machining is disclosed which affords automatic blending between a machined surface and a complex variable contour forged surface. An adaptive postprocessor generates an adaptive NC part program from a conventional APT file w... | 02/22/1994 |
| 5275531 | Area ruled fan blade ends for turbofan jet engine An axial flow transonic turbofan jet engine includes a hub (26) from which radiate a plurality of rotor blades (50). A casing (12) surrounds and shrouds the rotor blades (50). Part-span dampers (56) are located between adjacent rotor blades (50) in an ann... | 01/04/1994 |
| 5257908 | Turbine lashing structure Turbine blades are held in groups formed by a series of spaced lugs constituting a lashing structure. Selected lugs have gaps which are "Z"-shaped, the gaps tending to close during untwisting of the blades when the blades are subjected to high centrifugal... | 11/02/1993 |
| 5253978 | Turbine blade repair A method of repairing a turbine blade comprising the steps of ascertaining a normal vibration characteristic of the blade, separating an outer end part of the blade from a residual inner part of the blade and subsequently securing a new end part to the re... | 10/19/1993 |
| 5248241 | Components made of hardenable and non-hardenable materials A component is provided with a relative undersize in an area to be subjected to increased stress, for instance, through temperature. The component is made of a hardenable steel. The undersize is overlaid with a non-hardenable steel thereby to provide the ... | 09/28/1993 |
| 5137426 | Blade shroud deformable protective coating A bladed rotor having blades with blade shrouds includes a deformable protective coating applied to the blades to increase the damage tolerance of the blades during foreign object ingestion. The protective coating deforms upon impact between the shroud an... | 08/11/1992 |
| 5044885 | Mobile blade for gas turbine engines providing compensation for bending moments In a mobile blade of a gas turbine engine comprising a root, a platform, and a vane forming the aerodynamic portion of the blade, the vane is arranged so that the geometric locus of the centers of gravity of successive cross-sections of the vane between t... | 09/03/1991 |
| 4919593 | Retrofitted rotor blades for steam turbines and method of making the same A retrofitted rotor blade having a longer length than an original rotor blade provided for a steam turbine rotor assembly has a tuned airfoil portion with natural resonant frequencies in a plurality of vibrational directions similar to the original rotor ... | 04/24/1990 |
| 4884951 | Method of clamping blades In order to clamp blades (1, 2, n) of turbomachines to influence the blade vibration occuring in such machines, the shroud plates (1a, 2a, na) are dimensioned in such a way that they are in contact with one another in the installed condition without clear... | 12/05/1989 |
| 4798519 | Compressor part span shroud A compressor blade assembly for a compressor operating at transonic or supersonic blade speeds has a part span shroud. The shroud is twisted having a first angle in the direction of airflow on one side of the shock wave and a second angle in the direction... | 01/17/1989 |
| 4784571 | Apparatus and method for reducing blade flop in steam turbine A steam turbine of the type employing a plurality of axial entry, integral shroud blades comprises spring means resident in a slot machined in at least one face of each shroud. The spring means urge against the adjacent shroud and reduce relative motion b... | 11/15/1988 |
| 4776764 | Structure for an axial flow elastic fluid utilizing machine An improved bladed rotor structure for an axial structure for a turbine which is easy to disassemble and produces high damping. Coupling members are located between adjacent blade ends to couple adjacent blades together. Anchoring elements affix adjacent ... | 10/11/1988 |
| 4767273 | Apparatus and method for reducing blade flop in steam turbine A steam turbine of the type employing axial entry, integral shroud blades has a pin disposed between adjacent shrouds that extends into tangentially oriented holes in the opposing faces of adjacent shrouds. The pins reduce blade flop during turning gear o... | 08/30/1988 |
| 4734010 | Damping element for independent turbomachine blades The present invention relates to a damping element for independent blades of a turbomachine in which the blades fastened in the rotor are connected together, preferably in the radially outer region, the connection between two blades consists of an elastic... | 03/29/1988 |
| 4722668 | Device for damping blade vibrations in turbo-machines In order to damp blade vibrations, the shroud plates of the blades are equipped with magnet inserts.... | 02/02/1988 |
| 4710102 | Connected turbine shrouding Turbine blades are held in long arc groups by a shroud structure, with gaps between segments of the shroud structure. These gaps are Z-shaped, the gaps tending to close due to untwisting of the blades when the blades are subjected to high centrifugal forc... | 12/01/1987 |
