ROTOR DYNAMICS ACCOMMODATION USING ELECTRICAL POWER ASSIST

Hybrid electric propulsion systems are described. The systems include a gas turbine engine having low and high speed spools, each spool having a respective compressor and turbine. A mechanical power transmission is configured to at least one of extract power from and supply power to at least one of the low speed spool and the high speed spool, an electric machine is configured to augment rotational power of at least one of the spools, and a controller is operable to determine a rotational speed of the low speed spool, determine a rotational speed of the high speed spool, determine if a predetermined operational zone of operation based on the determined rotational speeds is present, and when a predetermined operational zone is determined, control a power augmentation of at least one spool to limit dwell operation of the gas turbine engine within the predetermined operational zone. 1. A hybrid electric propulsion system comprising:a gas turbine engine comprising a low speed spool and a high speed spool, the low speed spool comprising a low pressure compressor and a low pressure turbine, and the high speed spool comprising a high pressure compressor and a high pressure turbine;a mechanical power transmission configured to at least one of extract power from and supply power to at least one of the low speed spool and the high speed spool;an electric machine configured to augment rotational power of at least one of the low speed spool and the high speed spool; and determine a rotational speed of the low speed spool;', 'determine a rotational speed of the high speed spool;', 'determine if a predetermined operational zone of operation based on the determined rotational speeds is present; and', 'when a predetermined operational zone is determined, control a power augmentation of at least one of the low speed spool and the high speed spool to limit dwell operation of the gas turbine engine within the predetermined operational zone., 'a controller operable to2. The hybrid ...

Augmented drive of compressors via differential and multistage turbine

A method of distributing power within a gas turbine engine is disclosed. In various embodiments, the method includes driving a high pressure turbine having a first stage and a second stage with an exhaust stream from a combustor, the first stage connected to a high pressure turbine first stage spool and the second stage connected to a high pressure turbine second stage spool; driving a high pressure compressor connected to a high pressure compressor spool via a differential system, the differential system having a first stage input gear connected to the high pressure turbine first stage spool, a second stage input gear connected to the high pressure turbine second stage spool and an output gear assembly connected to the high pressure compressor spool; and selectively applying an auxiliary input power into at least one of the high pressure compressor spool and the high pressure turbine.

MULTISTAGE GAS TURBINE ENGINE WITH DIFFERENTIAL DRIVE OF COMPRESSOR

A gas turbine engine is disclosed. In various embodiments, the gas turbine engine includes a high pressure turbine having a first stage and a second stage, the first stage connected to a high pressure turbine first stage spool and the second stage connected to a high pressure turbine second stage spool; a high pressure compressor connected to a high pressure compressor spool; and a differential system having a first stage input gear connected to the high pressure turbine first stage spool, a second stage input gear connected to the high pressure turbine second stage spool and an output gear connected to the high pressure compressor spool. 1. A gas turbine engine , comprising:a turbine having a first stage and a second stage, the first stage connected to a first stage spool and the second stage connected to a second stage spool;a high pressure compressor connected to a high pressure compressor spool; anda differential system having a first stage input gear connected to the first stage spool, a second stage input gear connected to the second stage spool and an output gear connected to the high pressure compressor spool.2. The gas turbine engine of claim 1 , wherein the first stage input gear is coupled to the output gear via a first bevel gear connection.3. The gas turbine engine of claim 2 , wherein the second stage input gear is coupled to the output gear via a second bevel gear connection.4. The gas turbine engine of claim 3 , wherein the first stage spool and the second stage spool are configured to rotate about a central longitudinal axis.5. The gas turbine engine of claim 4 , wherein the output gear is configured to revolve about the central longitudinal axis.6. The gas turbine engine of claim 5 , wherein the output gear is configured to rotate with respect to the high pressure compressor spool.7. The gas turbine engine of claim 1 , wherein the differential system is configured to drive the high pressure compressor spool in response to the first stage spool and ...

SPOKED ROTOR FOR A GAS TURBINE ENGINE

A rotor for a gas turbine engine includes a plurality of blades which extend from a rotor disk at an interface, where the interface is defined along a spoke. A spool for a gas turbine engine includes the rotor disk, the plurality of blades with the interface defined along the spoke radially inboard of a blade platform, a rotor ring axially adjacent to the rotor disk, and a plurality of core gas path seals which extend from the rotor ring. Each of the plurality of core gas path seals extends from the rotor ring at a seal interface, with the seal interface defined along a spoke and the plurality of core gas path seals being axially adjacent to the blade platform. 1. A spool for a gas turbine engine comprising:a rotor disk defined along an axis of rotation;a plurality of blades which extend from said rotor disk, each of said plurality of blades extend from said rotor disk at a blade interface, said blade interface defined along a spoke radially inboard of a blade platform;a rotor ring defined about said axis of rotation, said rotor ring axially adjacent to said rotor disk;a plurality of core gas path seals which extend from said rotor ring, each of said plurality of core gas path seals extend from said rotor ring at a seal interface, said seal interface defined along a spoke, said plurality of core gas path seals axially adjacent to said blade platform.2. The spool as recited in claim 1 , wherein said spool is a high spool.3. The spool as recited in claim 1 , wherein said rotor ring and said rotor disk receive a rotor stack preload.4. The spool as recited in claim 3 , wherein said rotor stack preload defines an axial rotor stack load path radially inboard of said blade interface and said seal interface.5. The spool as recited in claim 1 , wherein each blade includes an airfoil section extending out from said blade platform claim 1 , and wherein said blade platform includes at least one seal recess.6. The spool as recited in claim 5 , wherein said at least one seal ...

GEARBOX FOR BOOST SPOOL TURBINE ENGINE

A turbine engine includes a core engine including a first spool and a second spool rotatable about a main engine longitudinal axis, a boost spool powered by a secondary drive system, and an accessory gearbox coupled to the core engine and the boost spool. A differential gear system is coupled between the core engine, the boost spool and the accessory gearbox for distributing power between the boost spool, the core engine and the accessory gearbox. 1. A turbine engine comprising:a core engine including a first spool and a second spool rotatable about a main engine longitudinal axis;a boost spool powered by a secondary drive system;an accessory gearbox coupled to the core engine and the boost spool; anda differential gear system coupled between the core engine, the boost spool and the accessory gearbox for distributing power between the boost spool, the core engine and the accessory gearbox.2. The turbine engine as recited in claim 1 , wherein the differential gear system includes a first differential gear and a second differential gear both coupled to a differential shaft claim 1 , the core engine is coupled to the first differential gear and the accessory gearbox is coupled to the second differential gear.3. The turbine engine as recited in claim 2 , wherein a tower shaft is coupled to one of the first spool or the second spool.4. The turbine engine as recited in claim 3 , wherein a first gear ratio between a tower shaft gear driven by the tower shaft and the first differential gear is different than a second gear ratio between an accessory drive gear and the second differential gear.5. The turbine engine as recited in claim 4 , wherein the first differential gear and the second differential gear are supported in a rotatable differential carrier and a boost spool input gear is coupled through a ring gear to drive rotation of the rotatable differential carrier.6. The turbine engine as recited in claim 5 , including a boost spool clutch for selectively coupling the ...

AUGMENTED DRIVE OF COMPRESSORS VIA DIFFERENTIAL AND MULTISTAGE TURBINE

A method of distributing power within a gas turbine engine is disclosed. In various embodiments, the method includes driving a high pressure turbine having a first stage and a second stage with an exhaust stream from a combustor, the first stage connected to a high pressure turbine first stage spool and the second stage connected to a high pressure turbine second stage spool; driving a high pressure compressor connected to a high pressure compressor spool via a differential system, the differential system having a first stage input gear connected to the high pressure turbine first stage spool, a second stage input gear connected to the high pressure turbine second stage spool and an output gear assembly connected to the high pressure compressor spool; and selectively applying an auxiliary input power into at least one of the high pressure compressor spool and the high pressure turbine. 1. A gas turbine engine , comprising:a turbine having a first stage and a second stage, the first stage connected to a first stage spool and the second stage connected to a second stage spool;a compressor connected to a compressor spool;a differential system having a first stage input gear connected to the first stage spool, a second stage input gear connected to the second stage spool and an output gear assembly connected to the compressor spool; andan augmentation system configured to input power into at least one of the compressor spool and the turbine.2. The gas turbine engine of claim 1 , wherein the differential system is configured to drive the compressor spool in response to the first stage spool and the second stage spool rotating at different speeds with respect to a central longitudinal axis.3. The gas turbine engine of claim 2 , wherein the differential system is configured to input a first stage spool rotational speed and a second stage spool rotational speed and output a compressor spool rotational speed having a value in between the first stage spool rotational speed ...

Performance advisory system

ABSTRACT OF THE DISCLOSURE A performance advisory system which includes a display, a control unit and an onboard computer, the computer receiving inputs from aircraft instruments and gauges and from the control unit and providing advisory output information on the display.

FOERFARANDE FOER FRAMSTAELLNING AV ETT AETBART KORVSKINN AV KOLLAGEN

Low carbon, high strength weldable alloy steel

Method of playing a simulated golf game

A method of playing a simulated golf game, which game may be played using a dart and a dart board having a generally circular playing surface that is adapted to receive the dart. The surface of the dart board includes a plurality of wedge-shaped zones, each of which corresponds to a hole of a golf course, a plurality of annular rings, and a generally circular bullseye located generally at the center thereof. The method includes providing an identifying indicia such as a number for each wedge-shaped zone, assigning a par value to each wedge-shaped zone, assigning a score with respect to par value to the bullseye, and assigning a score with respect to par value to each annular ring. In addition, an ordered sequence for each wedge-shaped zone is assigned so that each wedge-shaped zone may represent a hole of a simulated golf course, and so that the sequence may correspond to a sequence of holes on the simulated golf course representing a round of golf played on such course. As the game is played, each player may, in turn, launch the dart at the dart board for each hole of the simulated golf course and receive a score with respect to par for such hole. The cumulative total of each player's score is deemed to represent such player's score for a round of golf on the simulated golf course. A simulated golf game apparatus which may be employed to play the game is also disclosed.

Process for removing mercury vapors from gas streams

Edible collagen casing

ABSTRACT OF THE DISCLOSURE This invention relates to an improvement in a process for forming an edible tubular collagen casing wherein a hide collagen source is formed into an aqueous slurry, extruded through an annular die for forming a tubular casing, first tanned with an aluminum tanning agent, and then subsequently tanned with glutar-aldehyde and to the resulting produce made by the improved process. The improvement for improving the physical characteristics of the edible collagen casing in terms of shirrability, shirred strand characteristics, linking, and frying characteristics comprises: contacting said extruded casing in a first tanning bath containing from about 0.3 - 1.25% aluminum calculated as Al2(SO4)3 ? 14H20 based on the weight of the bath for a period of from about 2 - 15 minutes; contacting said first tanned casing in said subsequent tanning bath containing from about 80 - 300 ppm (parts per million) glutaraldehyde for a time sufficient to insure substantially complete dynamic equilibrium between said casing and said bath; and precipitating aluminum in said casing by passing said casing through a bath having a pH of from about 7.8 - 8.2.

Method and apparatus for wax lamination

Anti-sway device for trailer hitches

A device for preventing trailers hitched to passenger automobiles or tractors from swaying under the influence of lateral forces commonly encountered during relatively high speed straight line travel on highways. The device comprises a flat plate having a groove that faces and is engaged by a detent. The plate and the detent are mounted to the towing vehicle and the trailer and they are biased towards each other so that a torque of a predetermined magnitude is necessary to disengage the detent and the groove and permit sideway swaying, or relative angular movement of the trailer. After the detent is disengaged the necessary force to cause additional angular movements is reduced. The anti-sway device can be mounted to and used with conventional, already installed trailer hitches.

Means for optically determining relative thickness of surface coatings on glass articles and the like

Method for forming processed meats

This invention relates to an improvement in a process for cooking a meat product wherein the meat is held with string during the cooking operation and the tied product. The improvement in the invention comprises employing a string made of reconstituted edible collagen. Typically, the collagen has been processed by converting a collagen source to a slurry, extruded to form a shaped article capable of being converted to a string, coagulated, and tanned.

Method of selective etching

Financial document automation system and method

A process for automatically creating a geographic region-specific financial document pertaining to a financial product in real time such that all clauses present therein are effective. The process includes the steps of providing a computer database including at least one master financial document pertaining to a specific financial product, the master financial document having a plurality of document clauses, each of the clauses containing information associated with a different one of a plurality'of geographic regions, selecting the master financial document associated with the specific financial product from the database including the master financial document, providing information regarding a desired one of the plurality of regions and selecting all document clauses pertaining to the specific financial product and to the desired region to be used in the selected master financial document and assembling the clauses into the document to make a completed financial document. The process is performed by software residing on a server that can be accessed over a network, including the Internet. An advantage of the invention is that it creates financial documents, such as financial disclosure documents for financial products, that contain only the clauses needed for the specific document requested; there is no need for attaching alternate clauses to a document or for maintaining an inventory of printed documents pertaining to specific geographic regions.

Paper marking apparatus

Solvent for polybutadiene rubber

Intaglio cylinder

Wiping mechanism for intaglio printing presses

Augmented drive of compressors via differential and multistage turbine

A method of distributing power within a gas turbine engine is disclosed. In various embodiments, the method includes driving a high pressure turbine having a first stage and a second stage with an exhaust stream from a combustor, the first stage connected to a high pressure turbine first stage spool and the second stage connected to a high pressure turbine second stage spool; driving a high pressure compressor connected to a high pressure compressor spool via a differential system, the differential system having a first stage input gear connected to the high pressure turbine first stage spool, a second stage input gear connected to the high pressure turbine second stage spool and an output gear assembly connected to the high pressure compressor spool; and selectively applying an auxiliary input power into at least one of the high pressure compressor spool and the high pressure turbine.

Financial document automation system and method

Automatic pilot for vehicles

Method for podusing fibrous web from polymer film

Heating devices for melting rubberized bituminous compositions

Augmented drive of compressors via differential and multistage turbine

A method and system of distributing power within a gas turbine engine 100 is disclosed. The method/system includes driving a turbine 120 having a first stage 124 and a second stage 126 with an exhaust stream from a combustor 118. The first stage connected to a turbine first stage shaft 130 and the second stage connected to a turbine second stage spool 132. A compressor 116 is driven by a compressor spool 134 via a differential gearbox 140 having a first stage input gear (142, figure 1B) connected to the turbine first stage spool, a second stage input gear (144) connected to the turbine second stage spool and an output gear assembly connected to the compressor spool. An auxiliary input power is applied into at least one of the compressor spool and the turbine.

Chemical additive for use in the production of cellulose products

Augmented drive of compressors via differential and multistage turbine

A method of distributing power within a gas turbine engine is disclosed. In various embodiments, the method includes driving a high pressure turbine having a first stage and a second stage with an exhaust stream from a combustor, the first stage connected to a high pressure turbine first stage spool and the second stage connected to a high pressure turbine second stage spool; driving a high pressure compressor connected to a high pressure compressor spool via a differential system, the differential system having a first stage input gear connected to the high pressure turbine first stage spool, a second stage input gear connected to the high pressure turbine second stage spool and an output gear assembly connected to the high pressure compressor spool; and selectively applying an auxiliary input power into at least one of the high pressure compressor spool and the high pressure turbine.

Control device for lubricating apparatus

Vorrichtung und Verfahren zum Rändeln der Kanten einer Bahn und damit hergestelltes Produkt

Method for podusing fibrous web from polymer film

Apparatus for melting rubberized bituminous compositions

Vorrichtung und Verfahren zum Rändeln der Kanten einer Bahn und damit hergestelltes Produkt

Method and device for the controlled delivery of herbicides and pesticides

Random control for power-driven unit

Gearbox for boost spool turbine engine

Edible collagen casing

Improvements relating to printed circuit micromodules

2-trichloromethylsulfenylethylthio-methylethylene-1, 2-bis(trichloromethylsulfenate)as fungicide and bacteriostat

Apparatus for smoothing hot melt coatings

Photoelectric steering for industrial trucks

Production of regenerated cellulose filaments from wood pulp

Safety razors

Rotor dynamics accommodation using electrical power assist

Hybrid electric propulsion systems are described. The systems include a gas turbine engine having low and high speed spools, each spool having a respective compressor and turbine. A mechanical power transmission is configured to at least one of extract power from and supply power to at least one of the low speed spool and the high speed spool, an electric machine is configured to augment rotational power of at least one of the spools, and a controller is operable to determine a rotational speed of the low speed spool, determine a rotational speed of the high speed spool, determine if a predetermined operational zone of operation based on the determined rotational speeds is present, and when a predetermined operational zone is determined, control a power augmentation of at least one spool to limit dwell operation of the gas turbine engine within the predetermined operational zone.