Patents Assigned to Rolls-Royce Power Engineering PLC
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Patent number: 7648340Abstract: The present invention provides an airfoil for a first stage turbine blade having an external surface with first and second sides. The external surface extends spanwise between a hub and a tip and streamwise between a leading edge and a trailing edge of the airfoil. The external surface includes a contour substantially defined by Table 1 as listed in the specification.Type: GrantFiled: December 21, 2006Date of Patent: January 19, 2010Assignee: Rolls-Royce Power Engineering PLCInventors: Keith Sadler, Andrew Thomas Napper
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Patent number: 7632072Abstract: The present invention provides an airfoil for a third stage blade having an external surface with first and second sides. The external surface extends spanwise between a hub and a tip and streamwise between a leading edge and a trailing edge of the airfoil. The external surface includes a contour substantially defined by Table 1 as listed in the specification.Type: GrantFiled: December 19, 2006Date of Patent: December 15, 2009Assignee: Rolls-Royce Power Engineering PLCInventor: Mark Sheffield
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Patent number: 7625184Abstract: The present invention provides an airfoil for a second stage turbine blade having an external surface with first and second sides. The external surface extends spanwise between a hub and a tip and streamwise between a leading edge and a trailing edge of the airfoil. The external surface includes a contour substantially defined by Table 1 as listed in the specification.Type: GrantFiled: December 21, 2006Date of Patent: December 1, 2009Assignee: Rolls-Royce Power Engineering plcInventors: John Jay, Simon Charles Harding
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Patent number: 7618240Abstract: The present invention provides an airfoil for a first stage nozzle guide vane having an external surface with first and second sides. The external surface extends spanwise between a hub and a tip and streamwise between a leading edge and a trailing edge of the airfoil. The external surface includes a contour substantially defined by Table 1 as listed in the specification.Type: GrantFiled: December 22, 2006Date of Patent: November 17, 2009Assignee: Rolls-Royce Power Engineering plcInventors: Ivor Saltman, Sean Alan Walters, Andrew Thomas Napper
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Patent number: 7594403Abstract: A gas turbine engine system including a plurality of bleed off doors forming a portion of a conical surface in the flow path between the low pressure compressor and the intermediate pressure compressor. A plurality of actuators are coupled to a unison ring and move the unison ring in a substantially axial direction. The plurality of bleed off doors are coupled to the unison ring and move therewith.Type: GrantFiled: February 15, 2007Date of Patent: September 29, 2009Assignee: Rolls-Royce Power Engineering PLCInventor: Michel Cadieux
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Publication number: 20090145100Abstract: A turbine power plant employs a radial staging of a liquid injection system to provide a uniform fluid distribution, for use in wet compression. The liquid injection system includes a hub to be coupled to an air intake case of a turbine power plant. An annular ring assembly is spaced radially outwardly from the hub. Spray bars are spoked about the hub and the annular ring. The spray bars each include a body portion having an inner end coupled to the hub and an outer end coupled to the ring assembly. The spray bars each have at least two nozzle assemblies along the body portion. The spray bars each define at least two liquid supply manifolds each having an inlet at the annular ring assembly and an outlet at an associated nozzle assembly. The liquid supply manifolds each supply liquid to one or more associated nozzle assemblies.Type: ApplicationFiled: December 5, 2008Publication date: June 11, 2009Applicant: Rolls-Royce Power Engineering PLCInventors: Walter Kasimierz Omielan, Gabriel Taraboulsi, Chris Pin Harry
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Patent number: 6130523Abstract: A generator transfer function regulator incorporating two control loops. The first control loop produces a first generator excitation control signal (U) which varies to compensate for variations in the magnitude of the generator output voltage (V.sub.1) . The second generator loop produces a second generator excitation control signal (U.sub.e) which varies so as to maintain substantially constant the response of the generator system to variations in the generator output. The two control signals are combined and applied to a conventional generator exciter circuit (2). As a result, the generator terminal voltage (V.sub.1) control performance achieved by the AVR under open circuit conditions is effectively maintained when the generator is loaded over its range of operation, irrespective of the power system which the generator feeds.Type: GrantFiled: September 24, 1999Date of Patent: October 10, 2000Assignee: Rolls Royce Power Engineering PlcInventors: Frank Michael Hughes, Mohammad Sadegh Ghazizadeh
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Patent number: 5973436Abstract: An electrical machine has a rotor shaft (12) which carries a plurality of rotor discs (14) for rotation therewith. Each rotor disc (14) has pairs of rotor rims (16) secured thereto. Each rotor rim (16) consists of a single row of alternate magnets (20) and laminated pole pieces (18) and is opposed by a series of stator cores (22) which straddle the rotor rim (16). Armature windings (24) are disposed within the stator cores (22) for operably exciting said stator. The phase relationship between the currents through the armature windings (24) and the orientation of the stator cores (22) or the magnets (20) in opposing rims (16) are such that the effects of electromagnetic coupling, long path fluxes and torque ripple is reduced.Type: GrantFiled: July 30, 1997Date of Patent: October 26, 1999Assignee: Rolls-Royce Power Engineering plcInventor: Alan J. Mitcham
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Patent number: 5939996Abstract: An optical element is fitted to a high intensity light emitting diode used in a variable message sign. The optical element has surfaces which redirect any stray light from the light emitting diode to form useful light. The faces of the optical element are angled to shape the light beam emitted therefrom. The light beam is shaped by the faces to produce a beam having increased intensity in a predetermined direction. The optical element enhances the visibility of the sign and allows a reduction in the number of light emitting diodes used in the sign.Type: GrantFiled: March 6, 1997Date of Patent: August 17, 1999Assignee: Rolls-Royce Power Engineering plcInventors: Patrick E Kniveton, John H Brown
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Patent number: 5934761Abstract: A boring machine having a cutter head rotatably mounted on a hydrostatic bearing. High pressure water is supplied to passageways between confronting bearing surfaces which react axial and radial loads and which are capable of relative rotational movement. The flow of pressurized water discharges from the passageways to prevent contamination of the bearing by the ingress of material removed by the cutter head in operation.Type: GrantFiled: June 13, 1997Date of Patent: August 10, 1999Assignee: Rolls-Royce Power Engineering PLCInventor: David Edwin Yates
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Patent number: 5886449Abstract: An electrical machine has a rotor shaft which carries a plurality of rotor discs for rotation therewith. Each rotor disc has two pairs of rotor rims secured thereto. Each rotor rim consists of a single row of alternate magnets and pole pieces and is opposed by a series of stator cores which straddle the rotor rim. The stator cores are `c` shaped so that they receive flux from two adjacent magnets and close around two opposite rotor poles on either side of the rotor rim. The stator cores, formed by winding electrical steel around a former, reduce the losses caused by eddy currents generated when flux impinges on the side faces of the stator core.Type: GrantFiled: August 8, 1996Date of Patent: March 23, 1999Assignee: Rolls-Royce Power Engineering plcInventor: Alan J Mitcham
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Patent number: 5877578Abstract: A rotor disc for use in an electrical machine has circumferential rotor rims mounted thereon. The rotor rim comprises a row of alternate magnets and pole pieces. The magnets are tapered at their radially inner and outer extents and engage with correspondingly tapered surfaces on adjacent pole pieces to prevent relative physical movement therebetween.Each side of the radially inner and outer extents of the magnets may be tapered by a different amount to ensure correct orientation of the magnet polarity.Type: GrantFiled: December 6, 1996Date of Patent: March 2, 1999Assignee: Rolls-Royce Power Engineering plcInventors: Alan J Mitcham, John Rickman, Colin J Grime
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Patent number: 5669766Abstract: A fossil fuel air burner nozzle is provided with a wall (22) at its inlet, in which are apertures (34) which narrow in a direction radially outward of the nozzle. Each aperture is axially aligned with a respective bluff member (18) at the outlet so as to deliver thereto a fuel air mix flow at a velocity which is graded in said radial direction so as to ensure flame retention on the bluff members (18).Type: GrantFiled: March 24, 1995Date of Patent: September 23, 1997Assignee: Rolls-Royce Power Engineering plcInventor: Peter F. Hufton
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Patent number: 5649494Abstract: A burner (10) for the combustion of fuel comprises a passage (32) through which in operation a mixed flow of fuel and air passes for primary combustion at it's outlet. Two further annular passages (34, 36), concentric with and radially outward of the passage (32), are provided through which supplementary flows of air pass to support the primary combustion. The outlets of the two annular passages (34, 36) diverge to discharge the supplementary flows of air at an angle to the mixed flow of fuel and air. Members (62) are provided in the annular passage which obstruct the discharge of the supplementary flow of air. Furnace gases circulate in the region downstream of the obstruction members (62). Circulation of the furnace gases delays the mixing of the fuel and air mixture with the supplementary air flows to reduce the nitrogen oxides produced.Type: GrantFiled: February 10, 1995Date of Patent: July 22, 1997Assignee: Rolls-Royce Power Engineering plcInventor: Peter F. Hufton
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Patent number: 5618115Abstract: A rotating assembly (10) comprises an inner (12) and an outer ring (14) having a hydrostatic bearing therebetween. The bearing incorporates fluid passageways (30 and 32) between confronting surfaces (22, 24, 26 and 28) of the rings (12 and 14). When rotation is required the surfaces (22, 24, 26 and 28) are separated by the supply of a pressurised flow of fluid to both of the passageways (30 and 32). The bearing can be locked to prevent rotation by removal of the fluid in one of the passageways (32) whilst maintaining the flow of pressurised fluid in the other passageway (30) so as to hold confronting surfaces (26 and 28) in contact with one another. Frictional forces between the confronting surfaces (26 and 28) prevents rotation of the ring (14) and the flow of pressurised fluid prevents the confronting surfaces (26 and 28) separating under the application of a moment.Type: GrantFiled: November 24, 1995Date of Patent: April 8, 1997Assignee: Rolls-Royce Power Engineering plcInventor: David E. Yates
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Patent number: 5572039Abstract: The assessment of clearance conditions in an operating turbine structure has provide difficult to achieve. The invention provides apparatus which enables the clearance between seal fins on rotating blades and adjacent fixed structure, to be observed during rotation, and comprises refracting prisms (30, 32) on the fixed structure arranged so as to straddle sealing fin (14) on the blades. The stage of blades on their associated disc are moved towards the fixed structure and light which is refracted through the prisms is obscured by the fins. In one embodiment, the ratio of obscured to unobscured light is utilised to generate electrical signals, which are then manipulated so as to indicate the magnitude of the clearance.Type: GrantFiled: August 15, 1994Date of Patent: November 5, 1996Assignee: Rolls-Royce Power Engineering plcInventors: Michael Sweeney, Michael P. Jenkins
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Patent number: 5560714Abstract: A bearing assembly comprises a piston mounted within and capable of reciprocating movement with respect of a fixed bearing shell. The bearing shell is provided with openings for the supply of a bearing medium, such as compressed air, into a clearance between the piston and the bearing shell. The bearing shell is resilient so that as the diameter of the piston increases due to thermal expansion, the diameter of the bearing shell changes to automatically maintain the clearance therebetween.Type: GrantFiled: August 25, 1995Date of Patent: October 1, 1996Assignee: Rolls-Royce Power Engineering, plcInventor: Peter F. Hufton
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Patent number: 5483906Abstract: A solid particulate fuel/air burner has opposing fluted members within a rectangular conduit which in operation forms a nozzle. Splitter plates with the fluted members define passages through which a particulate solid fuel and air flow to a combustion chamber. The passages so defined provide and control separate streams of the mix such that flame retention at the exit of the conduit is achieved and reduced NOx is produced and the gathering of ash in the conduit avoided by the obviation of recirculation of the products of combustion into the conduit.Type: GrantFiled: October 21, 1994Date of Patent: January 16, 1996Assignee: Rolls-Royce Power Engineering plcInventor: Peter F. Hufton
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Patent number: 5464344Abstract: An apparatus and method are provided for reducing NO.sub.x production during combustion in an tangential burner. Air nozzles are arranged tangentially to a fuel/air nozzle and are tilted relative to the fuel air nozzle. Upon operation, spaces are formed between the air flow and the fuel flow which entrain laterally combustion gases thereby delaying mixing of the air and fuel flows. By this delay, NO.sub.x production is reduced.Type: GrantFiled: June 29, 1994Date of Patent: November 7, 1995Assignee: Rolls-Royce Power Engineering plcInventor: Peter F. Hufton