Gas Turbine Patents (Class 184/6.11)
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Patent number: 8356694Abstract: A recirculating lubrication system for a gas turbine engine comprises: a storage reservoir for storing a quantity of lubrication oil for the engine; an operating reservoir for supplying lubrication oil for the engine; a transfer valve with an inlet coupled to an outlet of the storage reservoir and an outlet coupled to an inlet of the operating reservoir to transfer the quantity of lubrication oil from the storage reservoir to the operating reservoir before starting the engine; and a pump for circulating the transferred lubrication oil through at least one engine bearing and back to the operating reservoir.Type: GrantFiled: August 28, 2007Date of Patent: January 22, 2013Assignee: Pratt & WhitneyInventor: Anthony C Jones
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Publication number: 20130015018Abstract: A sealing device for a chamber including at least one rotary member and at least one static member of a jet engine and can contain a lubricating oil droplet suspension. The sealing device includes at least one brush seal that includes juxtaposed strands and is set to ensure sealing between at least one rotary member and at least one stationary member, a mechanism to recover part of the oil suspended within the inner space of the chamber, and a mechanism to deliver the recovered oil. The delivery mechanism is set up to generate a flow of oil along the strands of the brush seal, the oil flow being oriented in the direction of the rotary member. The brush seal thus provides better resistance to coking.Type: ApplicationFiled: March 23, 2011Publication date: January 17, 2013Applicant: SNECMAInventors: Gerard Philippe Gauthier, Serge Rene Morreale
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Publication number: 20130008745Abstract: A lubrication system is provided for delivering a lubricant to a plurality of nozzles.Type: ApplicationFiled: July 5, 2011Publication date: January 10, 2013Applicant: HONEYWELL INTERNATIONAL INC.Inventors: Rich Barrett, Larry Ball, Douglas Spencer, Victor Reyes, Don Rossi, Alan Tiltman, Daniel Troller, James Ebken, Mike O'Brien
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Patent number: 8348017Abstract: An assembly includes a reservoir for holding a fluid, and a scavenge passage connected to the reservoir at a reservoir inlet. The scavenge passage returns the fluid from a delivery location to the reservoir. A bleed passage is connected in fluid communication between the reservoir and the scavenge passage.Type: GrantFiled: December 13, 2011Date of Patent: January 8, 2013Assignee: United Technologies CorporationInventors: Paul A. Dickie, Larry W. Spires
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Patent number: 8312702Abstract: An oil recovery device is disclosed. The oil recovery device includes two bearing supports mounted on an inter-turbine casing, a first bearing and a second bearing mounted on the bearing supports, a low-pressure turbine journal mounted rotating with respect to the inter-turbine casing, a fixed ferrule, and an oil passage provided in the low-pressure turbine journal making it possible to discharge the oil inside the fixed ferrule. The ferrule is preferentially widened from the end at which the oil is discharged.Type: GrantFiled: February 2, 2009Date of Patent: November 20, 2012Assignee: SNECMAInventors: Jacques René Bart, Serge René Morreale, Jean-Luc Soupizon
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Patent number: 8312969Abstract: A lubrication system for an aircraft engine includes a lubrication fluid tank and a fluid passage communicating with the tank to define an entry of the passage inside the tank. The entry is positioned in a location submerged in the lubrication fluid for delivery of the lubrication fluid under a pressure differential, from the tank to the lubrication system regardless of the tank or aircraft attitude.Type: GrantFiled: June 29, 2010Date of Patent: November 20, 2012Assignee: Pratt & Whitney Canada Corp.Inventor: Tuyen Trong Hoang
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Patent number: 8292034Abstract: The present invention provides an air-oil separator comprising a first region having a mixture of air and oil, a second region wherein separation of at least some of the oil from the air-oil mixture occurs and at least one multi-directional injector plug located on a rotating component in flow communication with the first region and the second region, the multi-directional injector plug having a discharge head that is oriented such that at least a part of the air-oil mixture discharged therefrom has a component of velocity that is tangential to the direction of rotation of the rotating component.Type: GrantFiled: November 28, 2007Date of Patent: October 23, 2012Assignee: General Electric CompanyInventors: James Kevin Mount, Richard Walker Nicholson, Duane Howard Anstead, Robert Proctor, Pradeep Hemant Sangli, Prasad Laxman Kane, Mark Leonard Hopper
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Patent number: 8292510Abstract: A system for removing oil from a bearing compartment has a port connected to an end wall of the compartment through which the oil exits the compartment, a scavenge scoop connected to the port for collecting the oil, and a separation device connected to the scavenge scoop for creating an oil collection region.Type: GrantFiled: September 28, 2006Date of Patent: October 23, 2012Assignee: United Technologies CorporationInventors: Jorn A. Glahn, Denman H. James, William G. Sheridan
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Patent number: 8281563Abstract: A gas-turbine bearing oil system with an oil supply arrangement includes at least one oil pump 5 supplying oil from an oil tank 1 to the bearing chambers 2, 3, 4 and at least one scavenge pump unit 6 returning oil from the bearing chambers 2, 3, 4 to the oil tank 1 At least one additional electric scavenge pump 7 is used to return oil from at least one bearing chamber 2, 3, 4 to the oil tank 1.Type: GrantFiled: February 19, 2009Date of Patent: October 9, 2012Assignee: Rolls-Royce Deutschland Ltd & Co KGInventor: Arnaud Pisseloup
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Patent number: 8256575Abstract: Methods and systems for reducing a flow of ambient air into a bearing lubricating oil system are provided. The system includes a lubricating oil bearing cover that is stationary with respect to the bearing wherein the bearing is configured to support a portion of a rotatable machine shaft. The cover includes a first end cap extending radially inwardly towards the shaft such that a cavity surrounding the bearing is formed by the cover and the first end cap and a set of seal rings positioned substantially concentric with the shaft and forming a seal against lubricating oil flow. The seal rings include a plurality of wire bristles extending radially inwardly from the end cap wherein the wire bristles are configured to extend to a surface of the shaft when assembled and the bristles are configured to present a tortuous flow path to gas infiltrating the cavity.Type: GrantFiled: August 22, 2007Date of Patent: September 4, 2012Assignee: General Electric CompanyInventor: Nathan Robert Berberich
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Patent number: 8256576Abstract: An oil circulation system for a gas turbine engine includes a variable displacement scavenge pump for pumping oil, a first actuator for controlling displacement of the scavenge pump, a variable displacement pressure pump for pumping oil, a second actuator for controlling displacement of the pressure pump, and a drive shaft. Both the scavenge pump and the pressure pump are driven by the drive shaft.Type: GrantFiled: February 22, 2011Date of Patent: September 4, 2012Assignee: United Technologies CorporationInventors: Jorn A. Glahn, Denman H. James
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Patent number: 8245818Abstract: A method for scavenging oil in a gas turbine engine comprises using a driving fluid flow to drive a flow of a fluid collected in an oil system of the engine to pass through an ejector and then the driven flow of the fluid is directed to be discharged into an oil tank.Type: GrantFiled: October 23, 2007Date of Patent: August 21, 2012Assignee: Pratt & Whitney Canada Corp.Inventor: Daniel T. Alecu
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Patent number: 8235647Abstract: A gas turbine has a rear bearing chamber 2 including a bearing arrangement 1. A vent valve 14 vents the bearing chamber 2 as a function of relative pressure of the bearing chamber.Type: GrantFiled: December 8, 2008Date of Patent: August 7, 2012Assignee: Rolls-Royce Deutschland Ltd & Co KGInventors: Arnaud Pisseloup, Brian Giessel
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Patent number: 8230974Abstract: A pump system for lubricating a bearing in a gear system of a gas turbine engine includes a main pump, an auxiliary pump, an auxiliary reservoir, a sump, and a valve system. The main pump is fluidically connected to the bearing through a main supply passage. The auxiliary pump is fluidically connected to the bearing through an auxiliary supply passage. The valve system transfers lubricating liquid from the main pump to the bearing under a first set of engine operating conditions. The valve system transfers lubricating liquid from the auxiliary reservoir to the sump and from the sump through the auxiliary pump to the bearing under a second set of engine operating conditions. The valve system transfers lubricating liquid from the auxiliary reservoir through the auxiliary pump, bypassing the sump, to the bearing under a third set of engine operating conditions.Type: GrantFiled: May 22, 2009Date of Patent: July 31, 2012Assignee: United Technologies CorporationInventor: Francis Parnin
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Publication number: 20120181113Abstract: An oil scavenge system of a gas turbine engine in accordance with one embodiment of the present invention, comprises a housing defined about an axis of rotation, the housing confining an air/oil mixture in motion within the housing and defining an oil scavenge area below the axis of rotation. The housing further includes an outlet at a low location of the housing. A churning damper is supported within the housing and is located in the oil scavenge area. The churning damper includes at least one plate, allowing the air/oil mixture in motion to pass over or through the plate only in a peripheral area of the at least one plate to cause flow energy dissipation.Type: ApplicationFiled: March 29, 2012Publication date: July 19, 2012Applicant: PRATT & WHITNEY CANADA CORP.Inventors: Daniel T. ALECU, Kenneth PARKMAN
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Publication number: 20120181112Abstract: An assembly for holding a fluid includes an auxiliary reservoir inside a main reservoir. The auxiliary reservoir includes an auxiliary reservoir shell with a fill passage at or near its bottom. The auxiliary reservoir shell also has a vent passage at or near its top. The fill passage and the vent passage fluidically connect the auxiliary reservoir to the main reservoir. A fluid inlet is located inside the main reservoir and outside of the auxiliary reservoir. A fluid outlet located inside the auxiliary reservoir between the fill passage and the vent passage.Type: ApplicationFiled: March 28, 2012Publication date: July 19, 2012Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Robert D. Szolomayer, David L. Motto
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Patent number: 8215454Abstract: A lubrication system includes an auxiliary lubricant tank 48, a supply conduit 58 extending from a source of lubricant 26 to the auxiliary lubricant tank. A reduced-G bypass line 108 branches from the conduit and enters the auxiliary tank at a first elevation E1. The system also includes an auxiliary tank discharge conduit 116, a portion of which resides within the tank. The resident portion has an opening 122 at least partially at a second elevation E2 higher than the first elevation.Type: GrantFiled: November 22, 2006Date of Patent: July 10, 2012Assignee: United Technologies CorporationInventors: Lawrence E. Portlock, Michael E. McCune, Louis J. Dobek
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Patent number: 8210316Abstract: An oil scavenge system includes a scavenge pipe which extends forward into a relatively long and narrow compartment area of a rear bearing compartment of a gas turbine engine with aggressive core size constraints. The scavenger pipe communicates collected oil to a scavenger pump to return oil to the oil sump and evacuate the oil before flooding of the seals may occur.Type: GrantFiled: December 12, 2006Date of Patent: July 3, 2012Assignee: United Technologies CorporationInventors: Enzo DiBenedetto, Todd A. Davis
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Patent number: 8205427Abstract: A heat exchange system for use in operating equipment having a plurality of subsystems in each of which one of a plurality of working fluids is utilized to provide selected operations with there being an air and working fluid heat exchanger providing controlled cooling to cool at least one of the plurality of working fluids in its corresponding subsystem. In addition, a coupling heat exchanger is also provided connected to two of the subsystems to pass there working fluids therethrough, including the subsystem with the air and working fluid heat exchanger, to allow one of the connected subsystems to aid in cooling the other.Type: GrantFiled: November 9, 2006Date of Patent: June 26, 2012Assignee: United Technologies CorporationInventors: Frederick W. Schwarz, Jorn A. Glahn
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Patent number: 8201663Abstract: A lubrication scavenge system is disclosed herein. The lubrication scavenge system includes a sump housing substantially encircling a structure disposed for rotation about an axis. The sump housing has an inwardly-facing surface extending at least partially about the axis in a spiral path. The spiral path increases in radial distance from the axis in the direction of rotation of the structure, in a plane perpendicular to the axis. The spiral path extends 360°.Type: GrantFiled: January 11, 2011Date of Patent: June 19, 2012Assignee: Rolls-Royce CorporationInventor: John Munson
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Electric motor driven lubrication pump control system and method for turbomachine windmill operation
Patent number: 8201662Abstract: A system and method are provided to selectively control lubricant supply flow to a rotating machine that is installed in an aircraft having ram air turbine that is movable between at least a deployed position and a stowed position. A controller determines at least when the ram air turbine is in the deployed position, and determining when rotational speed of the rotating machine exceeds a predetermined value. The electric motor driven lubrication pump is at least selectively energized to control the measured lubricant pressure to a predetermined minimum pressure at least when the ram air turbine is deployed and the rotational speed exceeds the predetermined value.Type: GrantFiled: July 16, 2008Date of Patent: June 19, 2012Assignee: Honeywell International Inc.Inventors: Jim Delaloye, Matthew Christopher -
Patent number: 8191686Abstract: A method of providing a standby lubrication for an engine in the event of the failure of a main lubrication system of this engine, in which the failure is detected and, in response to the detection of this failure, at least one portion of a fuel fluid of the engine is tapped off to lubricate at least one element of the engine. A standby lubrication device includes a device for detecting a failure of a main lubrication system, a device for tapping off at least a portion of a fuel fluid of the engine in order to direct it to at least one element of the engine intended to be lubricated, and a controller connected to the tapping and detection devices, in order to carry out the standby lubrication method.Type: GrantFiled: February 19, 2008Date of Patent: June 5, 2012Assignee: SNECMAInventor: Jean Pierre Galivel
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Patent number: 8181746Abstract: An assembly for holding a fluid includes an auxiliary reservoir inside a main reservoir. The auxiliary reservoir includes an auxiliary reservoir shell with a fill passage at or near its bottom. The auxiliary reservoir shell also has a vent passage at or near its top. The fill passage and the vent passage fluidically connect the auxiliary reservoir to the main reservoir. A fluid inlet is located inside the main reservoir and outside of the auxiliary reservoir. A fluid outlet located inside the auxiliary reservoir between the fill passage and the vent passage.Type: GrantFiled: September 18, 2008Date of Patent: May 22, 2012Assignee: United Technologies CorporationInventors: Robert D. Szolomayer, David L. Motto
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Patent number: 8167091Abstract: An oil scavenge system of a gas turbine engine in accordance with one embodiment of the present invention, comprises a housing defined about an axis of rotation, the housing confining an air/oil mixture in motion within the housing and defining an oil scavenge area below the axis of rotation. The housing further includes an outlet at a low location of the housing. A churning damper is supported within the housing and is located in the oil scavenge area. The churning damper includes at least one plate, allowing the air/oil mixture in motion to pass over or through the plate only in a peripheral area of the at least one plate to cause flow energy dissipation.Type: GrantFiled: March 28, 2007Date of Patent: May 1, 2012Assignee: Pratt & Whitney Canada Corp.Inventors: Daniel T. Alecu, Kenneth Parkman
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Publication number: 20120080272Abstract: An assembly includes a reservoir for holding a fluid, and a scavenge passage connected to the reservoir at a reservoir inlet. The scavenge passage returns the fluid from a delivery location to the reservoir. A bleed passage is connected in fluid communication between the reservoir and the scavenge passage.Type: ApplicationFiled: December 13, 2011Publication date: April 5, 2012Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Paul A. Dickie, Larry W. Spires
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Patent number: 8146711Abstract: An assembly includes a reservoir for holding a fluid, and a scavenge passage connected to the reservoir at a reservoir inlet. The scavenge passage returns the fluid from a delivery location to the reservoir. A bleed passage is connected in fluid communication between the reservoir and the scavenge passage.Type: GrantFiled: September 18, 2008Date of Patent: April 3, 2012Assignee: United Technologies CorporationInventors: Paul A. Dickie, Larry W. Spires
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Patent number: 8127828Abstract: A heat exchange system for use in fluid operated equipment to provide air and working fluid heat exchanges to cool the working fluid in airstreams on a stream side of a wall. An actuator is mounted to be substantially located on a side of the wall opposite the stream side thereof having a positionable motion effector. A heat exchanger core having a plurality of passageway structures therein to enable providing the working fluid to, and removal therefrom. The heat exchanger core is mounted on the motion effector so as to be extendable and retractable thereby through the opening for selected distances into that region to be occupied by the airstreams.Type: GrantFiled: March 17, 2006Date of Patent: March 6, 2012Assignee: United Technologies CorporationInventors: Frederick M. Schwarz, Frederick L. Elsaesser
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Patent number: 8113317Abstract: A system and method are provided to selectively control lubricant supply flow to one or more rotating machines in an aircraft when the rotating machines are windmilling. A controller determines if the rotating machines are windmilling. When the rotating machines are windmilling, the controller at least selectively energizes an electric motor driven lubrication pump, to thereby supply lubricant to the windmilling turbomachine.Type: GrantFiled: July 6, 2007Date of Patent: February 14, 2012Assignee: Honeywell International Inc.Inventor: Jim E. Delaloye
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Patent number: 8109365Abstract: An engine supercharger lubricating apparatus is provided with an oil passage, a pump and an air introducing passage. The oil passage is configured and arranged to supply a lubricating oil to a supercharger of an engine and to return the lubricating oil from the supercharger to an oil pan. The pump is arranged in the oil passage at a location downstream of the supercharger for pumping the lubricating oil from the supercharger to the oil pan. The air introducing passage is arranged to introduce air into the oil passage at a location downstream of the supercharger and upstream of the pump.Type: GrantFiled: April 2, 2008Date of Patent: February 7, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Arata Taguchi, Hidetsugu Komatsu
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Publication number: 20110315484Abstract: A lubrication system for an aircraft engine includes a lubrication fluid tank and a fluid passage communicating with the tank to define an entry of the passage inside the tank. The entry is positioned in a location submerged in the lubrication fluid for delivery of the lubrication fluid under a pressure differential, from the tank to the lubrication system regardless of the tank or aircraft attitude.Type: ApplicationFiled: June 29, 2010Publication date: December 29, 2011Applicant: PRATT & WHITNEY CANADA CORP.Inventor: Tuyen Trong HOANG
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Patent number: 8083030Abstract: An oil system (118) for a tip turbine engine (10) includes an annular lubricating fluid plenum (136) which sprays lubricating fluid through a multitude of lubricating fluid passages (144, 146, 148) and into the multitude of passages (152, 154, 156) located within a gearbox assembly (90) as they revolve thereby. Lubricating fluid is thereby communicated directly into the gearbox assembly (90) and returned to a sump tank (140) through a multitude of drain passages.Type: GrantFiled: December 1, 2004Date of Patent: December 27, 2011Assignee: United Technologies CorporationInventor: Lawrence E. Portlock
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Patent number: 8083469Abstract: A bearing lubrication system for a high temperature bearing, such as in a small gas turbine engine for a UAV, in which the bearing and lubricant requires a long shelf life, where the bearing includes a solid lubricant movable within a chamber formed within a housing and located adjacent to the bearing. The solid lubricant is biased by a spring toward the bearing and abuts against a runner that rotates along with the rotor shaft during engine operation. A cooling air passage opens into a space formed between the bearing and the solid lubricant to supply cooling air through the bearing. When the engine operates, heat is transferred through the runner to the solid lubricant to melt the lubricant. Rubbing of the runner against the biased solid lubricant will also melt the lubricant. The melting lubricant is carried by the cooling air through the bearing to provide both cooling and lubrication for the bearing.Type: GrantFiled: March 20, 2009Date of Patent: December 27, 2011Assignee: Florida Turbine Technologies, Inc.Inventor: Alex Pinera
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Publication number: 20110302903Abstract: A lubrication system for a gas turbine engine includes a variable output lubricant pump operable to supply lubricant to an actuator system.Type: ApplicationFiled: June 15, 2010Publication date: December 15, 2011Inventor: Leo J. Veilleux, JR.
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Patent number: 8066472Abstract: A lubrication system for a bearing assembly includes a fan shaft with a plurality of conduits, a first bearing rotatably supporting the fan shaft, and a second bearing rotatably supporting the fan shaft where the second bearing is axially spaced from the first bearing. The plurality of conduits includes at least a first conduit aligned with the first bearing and a second conduit aligned with the second bearing. A spray bar includes a plurality of supply orifices that direct lubricating fluid to the first and second bearings via at least the first and second conduits.Type: GrantFiled: November 6, 2007Date of Patent: November 29, 2011Assignee: United Technologies CorporationInventors: James B. Coffin, David M. Daley, Brady Walker
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Publication number: 20110284328Abstract: An assembly that includes an accessory gearbox (AGB) and a tank for a liquid lubricant for a turbojet engine. The AGB includes a gear connected to parallel shafts for mechanically driving accessories. The assembly includes a housing with two compartments and a partition perpendicular to the shafts for separating the compartments, a compartment defining the accessory gearbox and a compartment defining the liquid tank. The assembly can be compact and easily manufactured.Type: ApplicationFiled: January 29, 2010Publication date: November 24, 2011Applicant: HISPANO SUIZAInventors: Bernard Brandt, Frederic Cotin, Andre Raymond Christian Deperrois
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Patent number: 8051952Abstract: The invention relates to a deoiling device. It comprises a tube (46), a first bearing (16) and a second bearing (18), the first and second bearings being placed in an oil chamber (20) in which an oil fog is maintained by rotation of the bearings. A deoiler (30) is provided in one wall of the oil chamber. The deoiler centrifuges oil in suspension in air and allows a deoiled air flow to pass inside the tube. The tube (46) comprises a closing cap (48) fitted with one or several outlet orifices (50) in its upper part designed to evacuate air, and an oil drain orifice (52) in its lower part.Type: GrantFiled: January 26, 2009Date of Patent: November 8, 2011Assignee: SnecmaInventors: Jacques Rene Bart, Jacky Raphael Michel Derenes, Stephane Rousselin
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Patent number: 8047332Abstract: A drive gear includes a plurality of internal radial channels extending between the axial bore and the periphery of the gear, and an axial bore includes a lubricant distribution structure therein to provide lubrication where the teeth of the drive gear mesh with the teeth of a gear driven by the drive gear.Type: GrantFiled: May 8, 2007Date of Patent: November 1, 2011Assignee: Raytheon CompanyInventors: Gordon O. Salmela, Joseph A. Creonte
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Patent number: 8020664Abstract: The present invention relates to a turbomachine comprising an air compressor (3) and a lubrication circuit with an oil tank (1), said oil tank (1) being possibly isolated from the rest of the lubrication circuit (4,4A; 6,6A) by means of an isolation valve (7), wherein the isolation valve (7) is configured so as to: operate, i.e. to close and open respectively as the engine (2) stops and starts; remain open when the engine (2) is running; remain closed when the engine (2) is stopped.Type: GrantFiled: December 17, 2007Date of Patent: September 20, 2011Assignee: Techspace Aero S.A.Inventors: Albert Cornet, Marc Mon Fort
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Patent number: 8015810Abstract: A lubrication control system includes an accumulator to store oil. The accumulator can be filled with oil during operation of an engine. A control valve can be selectively operated to allow oil stored in the accumulator to flow to a turbocharger. At least one control module can control operation of a hybrid electric vehicle and determine an operating condition of the engine and command the control valve to open and close based on the operating condition.Type: GrantFiled: May 14, 2007Date of Patent: September 13, 2011Inventor: Mark A. Theobald
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Patent number: 7971423Abstract: A gas turbine engine incorporating a starter mounted on the gear box is disclosed. The gas turbine engine includes an AGB gear housing mechanically connected with an engine shaft for driving auxiliary machines and an air starter mounted on the housing, the starter and housing enclosures being in communication such that the lubricating oil of the starter should be distributed from the AGB housing. The oil enclosure of the starter is pressurized by a source of air, being independent from the AGB housing. Advantageously, the pressurization air is taken from a pressurization enclosure of an engine bearing.Type: GrantFiled: January 29, 2008Date of Patent: July 5, 2011Assignee: Hispano SuizaInventors: Chloe Avila, Jean-Louis Charbonnel, Marie-Lise Dardenne, Corinne Follonier, Pierre Charles Mouton
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Publication number: 20110155508Abstract: An oil circulation system for a gas turbine engine includes a variable displacement scavenge pump for pumping oil, a first actuator for controlling displacement of the scavenge pump, a variable displacement pressure pump for pumping oil, a second actuator for controlling displacement of the pressure pump, and a drive shaft. Both the scavenge pump and the pressure pump are driven by the drive shaft.Type: ApplicationFiled: February 22, 2011Publication date: June 30, 2011Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Jorn A. Glahn, Denman H. James
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Patent number: 7963371Abstract: Methods and apparatus for applying a uniform application of an appropriate quantity of lubricant to the internal threads of a pipe. In general, the apparatus includes a high pressure supply of lubricant and a high speed, rotating centrifugal applicator for evenly applying the lubricant to internal threads. The system also includes a dosing system to regulate the distribution of lubricant by dispensing a consistent volume of lubricant at each application. Potential advantages of the embodiments include the repeatability and consistency of amount of lubricant on pipe threads (e.g. thickness).Type: GrantFiled: April 30, 2008Date of Patent: June 21, 2011Assignee: National Oilwell Varco, L.P.Inventor: Jaroslav Belik
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Patent number: 7954599Abstract: A gear mechanism comprising at least two toothed parts accommodated in a casing, a storage tank that stores oil to be injected into each meshing zone of the at least two tooth parts, a first receptacle built into the casing for receiving oil, a second receptacle that communicates with the first receptacle into which the oil can flow from the first receptacle, the second receptacle in turn communicating with the storage tank. Oil is conveyed from the storage tank to each meshing zone at a pressure greater than the pressure prevailing in the casing, internal pressure in the casing is reduced, and oil is drained to the storage tank. The first and second receptacles have a substantially identical pressure, while the storage tank is generally maintained at atmospheric pressure. The gear mechanism operates at atmospheric pressure if the gear mechanism fails to reduce internal pressure in the casing.Type: GrantFiled: February 28, 2003Date of Patent: June 7, 2011Assignee: Flender GraffenstadenInventors: Alain Antonetti, Etienne Lauffenburger, Peter Leoni, Patrick Loos
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Publication number: 20110108360Abstract: An assembly for capturing lubricating liquid from a fan drive gear system of a gas turbine engine includes a gutter and an auxiliary reservoir. The gutter is positioned radially outward from a centerline axis of the gear system for capturing lubricating liquid slung from the gear system. The auxiliary reservoir is fluidically connected to the gutter for receiving and storing the lubricating liquid from the gutter. A portion of the auxiliary reservoir and a portion of the gutter have a same radial distance from the centerline axis of the gear system.Type: ApplicationFiled: November 12, 2009Publication date: May 12, 2011Applicant: UNITED TECHNOLOGIES CORPORATIONInventor: Enzo DiBenedetto
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Patent number: 7938230Abstract: A device for lubricating a component in an assembly of parts comprises a lubricant distribution chamber arranged in the vicinity of the component and formed by an annular setback in a ring mounted on a part of the assembly, said setback being closed automatically when the ring is mounted by means of a corresponding surface of the part into which there open out channels or ducts formed in the part and feeding the setback with lubricant and/or connecting the setback to means for taking lubricant to the component.Type: GrantFiled: April 25, 2005Date of Patent: May 10, 2011Assignee: SNECMAInventors: Régis Servant, Gaël Bouchy, Guy Lapergue
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Patent number: 7931124Abstract: A method of oil flow management for a gas turbine engine includes moving oil from a tank to a compartment using a pressure pump, moving oil from the compartment to the tank using a scavenge pump, and at least temporarily increasing a rate at which oil is moved with the scavenge pump by a greater amount than a rate at which oil is moved with the pressure pump to create at least a partial vacuum to negatively pressurize the compartment to reduce oil leakage.Type: GrantFiled: December 12, 2007Date of Patent: April 26, 2011Assignee: United Technologies CorporationInventors: Jorn A. Glahn, Denman H. James
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Patent number: 7913815Abstract: Disclosed is a solution to automate a seal oil float trap by-pass for a hydrogen cooled generator. An automated by-pass system is coupled to an existing manual by-pass system for a float trap for a hydrogen cooled generator. The automated by-pass system includes at least one solenoid valve and a controller that controls opening and closing of the solenoid valve. The automated by-pass system can also include manual valves, orifices and limit switches. The controller activates the solenoid valve to allow the seal oil to drain. The controller can also provide a notification alarm that the hydrogen cooled generator is being purged.Type: GrantFiled: January 27, 2009Date of Patent: March 29, 2011Assignee: General Electric CompanyInventors: Ravindra Annigeri, Patrick William Anglin, Marlowe Cameron Bjorklund, Leigh-Ann Darden Heuser, Reginald Wayne Kemp, David Lee Rogers
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Patent number: 7908840Abstract: A heat exchange system for use in operating equipment having a plurality of subsystems in each of which a common working fluid is utilized to provide selected operations in that subsystem with a reservoir containing at least some of the common working fluid and has both a supply system and a return system connected between the reservoir and each of the plurality of subsystems through which any common working fluid in the reservoir can be conveyed. An airstream heat exchanger is provided connected in one of the supply and return systems so as to have the common working fluid conveyed therethrough cooled at selectively variable rates in the airstreams passing thereby during at least some such uses of the operating equipment.Type: GrantFiled: November 29, 2006Date of Patent: March 22, 2011Assignee: United Technologies CorporationInventors: Frederick M. Schwarz, Jorn A. Glahn
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Patent number: 7905325Abstract: A pumped oil delivery system for delivering oil to moving parts of an aircraft jet engine includes a scoop delivery pump and an accumulator oil reservoir to maintain oil feed to the pump at all times. The system includes a first line to feed oil from the scoop pump to the oil reservoir, a second line to return oil from the oil reservoir to the scoop pump, and pressurized air for pressurizing the oil within the oil reservoir so as to maintain a continuous feed of oil to the pump. The system includes further lines for delivering oil from the scoop pump to the moving parts and for returning oil from the moving parts to the scoop pump. Moving parts include a self scavenging gear box utilizing the centrifugal pumping action of its gears to return oil to the scoop pump, and self scavenging bearing chambers using centrifugal effects of their rotating parts also to return oil to the scoop pump.Type: GrantFiled: October 12, 1990Date of Patent: March 15, 2011Assignee: Rolls-Royce plcInventors: Norman J Wedlake, Christopher Wright, Robin M Coleman, John A Rumbelow
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Publication number: 20110048856Abstract: A lubrication system for a gas turbine engine including at least one porous element located in a cavity containing at least one rotating component receiving a flow of the lubricant, the porous element being located across a path taken by a portion of the lubricant expelled from the at least one respective rotating component such that the portion of the lubricant circulates therethrough, the at least one porous element being made of a material resistant to a temperature of the lubricant, the at least one porous element reducing a velocity of the portion of the lubricant circulating therethrough.Type: ApplicationFiled: August 27, 2009Publication date: March 3, 2011Inventors: Patrick Thivierge, Mélanie Papilton, Pierre Gauvin, Patrick Arkinson, Robert Scandella, Tom Haslam-Jones, Ritchie Domingo