A hybrid compressed air energy storage system is provided. A heat exchanger 114 extracts thermal energy from a compressed air to generate a cooled compressed air stored in an air storage reservoir 120, e.g., a cavern. A heat exchanger 124 transfers thermal energy generated by a carbon-neutral thermal energy source 130 to cooled compressed air conveyed from reservoir 120 to generate a heated compressed air. An expander 140 is solely responsive to the heated compressed air by heat exchanger 124 to produce power and generate an expanded air. Expander 140 being solely responsive to heated compressed air by heat exchanger 124 is effective to reduce a temperature of the expanded air by expander 140, and thus a transfer of thermal energy from an expanded exhaust gas received by a recuperator 146 (used to heat the expanded air by the first expander) is effective for reducing waste of thermal energy in exhaust gas cooled by recuperator 146.
A generator including a stator frame, a plurality of stator donuts including a plurality of circumferentially disposed notches, and a plurality of a wedge assemblies for mounting the stator donuts to a plurality of building bolts is presented. Each wedge assembly includes a set of opposing wedges. The set of opposing wedges are positioned within a notch in a stator donut to create a locking force between a building bolt and the stator core. The wedge assembly also includes a tensioning bolt to set the opposing wedges to a position creating the locking force between the stator core and the building bolt.
System for hydraulic fracturing is provided. The system may involve a mobile hydraulic fracturing subsystem including a variable frequency drive (VFD) (12) electrically coupled to a generator (50). An electric motor (14) is driven by VFD (12). Harmonic mitigation circuitry (16) is configured to mitigate harmonic distortion by VFD (12). A hydraulic pump (20) is driven by motor (14) to deliver a pressurized fracturing fluid. VFD (12), harmonic mitigation circuitry (16), motor (14) and hydraulic pump (20) may be arranged on a mobile platform (24) so that a subsystem so arranged can be transportable from one physical location to another. In some disclosed embodiments, the hydraulic fracturing subsystem may be fitted on mobile platform (24) having size and weight not subject to laws or regulations requiring a permit and/or accompaniment by an escort vehicle to travel on a public highway, such as public highways in the United States and/or Canada.
System for hydraulic fracturing is provided. A generator (22) directly coupled to a gas turbine engine (24) without a rotational speed reduction device. Thus, generator (22) may operate at relatively high-speeds and may involve state-of-the art electromotive technologies, such as may include switched reluctance generators (SRG), synchronous reluctance generators (SynRG) or permanent magnet generators (PMG). Power circuitry (30) may be arranged to receive electric power generated by generator (22) and may be electrically connectable to a power bus (32). Gas turbine engine 24), generator (22) and power electronics circuitry (30) may each be respectively mounted onto a power generation mobile platform (34), and in combination constitute a mobile power-generating subsystem (20) that may be operationally arranged in combination with one or more hydraulic fracturing subsystems (50), mobile or otherwise, that can similarly take advantage of such electromotive technologies for motoring purposes.
E21B 41/00 - Equipment or details not covered by groups
E21B 43/26 - Methods for stimulating production by forming crevices or fractures
F02C 6/00 - Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
F02C 6/14 - Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
5.
SYSTEM FOR HYDRAULIC FRACTURING INCLUDING MOBILE POWER-GENERATING SUBSYSTEM WITH DIRECT-COUPLED ELECTROMOTIVE MACHINE INTEGRATED WITH ELECTRICAL ENERGY STORAGE
System 10 for hydraulic fracturing is provided. The system may include a mobile hybrid power-generating subsystem (25) including a gas turbine engine (14) and an electrical energy storage system (16). Power-generating subsystem (25) further including an electromotive machine (12), such as a switched reluctance electromotive machine or a permanent magnet electromotive machine, in either case having a rotor shaft coupled to a main shaft of the gas turbine engine without a rotational speed reduction device. A power bus (15) being powered by the electrical energy storage system and/or the electromotive machine (12). Gas turbine engine 14, electrical energy storage system 16 and electromotive machine (12) may be arranged on a power generation mobile platform (22) so that a subsystem so arranged can be transportable from one physical location to another, and effectively constitutes a selfcontained, mobile hybrid power-generating subsystem that may operate fully independent from utility power or external power sources.
System (10) for hydraulic fracturing is provided. The system may involve a mobile hybrid power-generating subsystem (25) including a gas turbine engine (14) and an electrical energy storage system (16). Power-generating subsystem (25) further including an electromotive machine (12) that may be configured to operate in a motoring mode or in a generating mode. During motoring, electromotive machine (12) may be responsive to electrical power from energy storage system (16) to provide black start of gas turbine (14). Gas turbine engine (14), electrical energy storage system (16) and electromotive machine (12) may be arranged on a power generation mobile platform (22) so that a subsystem so arranged can be transportable from one physical location to another, and effectively constitutes a self-contained, mobile hybrid power-generating subsystem that may operate fully independent from utility power or external power sources.
Typical hydraulic actuators require a supply of high-pressure fluid from a remote, centralized source. Piping between the source and the actuators can be expensive and can be a source for undesirable leakage. The provided self-contained hydraulic actuator alleviates these issues. The provided actuator is operable to move a valve stem between an opened position and a closed position, and comprises of a cylinder, which includes an open side and a close side, that is coupled to the valve stem, a first pump connected to the cylinder which is operable to deliver a first high- pressure fluid to the open side of the cylinder to move the valve stem toward the opened position, and a second pump, separate from the first pump, that is connected to the cylinder and operable to deliver a second high-pressure fluid to the close side of the cylinder to move the valve stem toward the closed position.
A false tooth assembly for a generator stator core is presented. The false tooth assembly has a tapered shape including multiple tapered false tooth pieces. The multiple tapered false tooth pieces are installed into a damaged area in a tooth of a lamination of the stator core such that a wide end of the false tooth assembly is disposed into a wide opening of the damaged area and a narrow end of the false tooth assembly is flushed with a narrow opening of the damaged area at a tip of the tooth. The tapered shape of the false tooth assembly enables the false tooth assembly to fill the entire damaged area and to lock the false tooth assembly into the damaged area. The false tooth assembly can be used to repair stator core in any region of the stator core including step iron region without being dislodged during generator operation.
Systems and methods for treating a stream (12) from a chemical enhanced oil recovery (CEOR) process are disclosed. The method includes contacting the feed stream (12) with a plurality of media composite particles (20) to remove hydrocarbons from the feed stream (12); and generating a treated stream (40) comprising a reduced amount of the hydrocarbons and at least a majority of the viscosity-enhancing polymer remaining therein relative to the feed stream (12). The feed stream (12) includes the hydrocarbons, a concentration of a viscosity-enhancing polymer of at least about 10 mg/L, and an aqueous fluid. The media composite particles (20) each comprise a mixture of a cellulose-based material and a polymer.
A hydraulic fracturing system that includes a fixed-speed gas turbine assembly (18) having a gas generator and power turbine, both mounted to a semi-trailer. The system further includes a hydraulic pump (28) mounted to the semi-trailer and connected to an output shaft of the power turbine and a hydraulically-driven fracturing fluid pump (30) mounted to the semi-trailer and being in fluid communication with the hydraulic pump (28), the hydraulic pump (28) supplying fluid pressure to the hydraulically-driven fracturing fluid pump (30). The system is configured such that the hydraulically- driven fracturing fluid pump (30) receives fracturing fluid containing chemicals and proppants and pressurizes the fracturing fluid to a pressure sufficient for injection into a wellbore to support a hydraulic fracturing operation.
A hybrid compressed air energy storage system is provided. A method of operation thereof includes compressing air during a storage period, and extracting thermal energy therefrom to produce a cooled compressed air. The cooled compressed air may be stored in an air storage unit, the extracted thermal energy may be stored in a thermal storage device, and the stored cooled compressed air may be heated with the stored extracted thermal energy to produce a heated compressed air during a generation period. The heated compressed air may be expanded with an expander to generate power and discharge an expanded air, which may be heated with a recuperator to produce a heated expanded air. A fuel mixture including the heated expanded air may be combusted to produce an exhaust gas, which may be expanded with a second expander to generate power and discharge the expanded exhaust gas to the recuperator.
A pumped heat energy storage system is provided. The pumped heat energy storage system may include a charging assembly configured to compress a working fluid and generate thermal energy. The pumped heat energy storage system may also include a thermal storage assembly operably coupled with the charging assembly and configured to store the thermal energy generated from the charging assembly. The pumped heat energy storage system may further include a discharging assembly operably coupled with the thermal storage assembly and configured to extract the thermal energy from the thermal storage assembly and convert the thermal energy to electrical energy.
According to various aspects and embodiments, a system (100) and method (200) for recycling gas in a backwash process is provided. The backwash process (200) may comprise removing contaminants from a bed of filtration media (160) in a water treatment process. The method (200) may comprise generating (202) a mixed liquid-gas stream (140) from the backwash process, withdrawing (204) the mixed liquid-gas stream (140) from the backwash process, separating (206) the mixed liquid-gas stream (140) into a liquid (150) and a gas (145), and recycling at least a portion of the separated gas (145) to the water treatment device (105).
A system and method for producing liquefied natural gas from a natural gas source is provided. The method may include feeding natural gas provided by the natural gas source to a liquefaction module. The method may also include flowing the natural gas through a product stream of the liquefaction module. The method may further include flowing a process fluid through a liquefaction stream of the liquefaction module to cool at least a portion of the natural gas flowing through the product stream to produce the liquefied natural gas.
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
F17C 7/00 - Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
F25B 9/06 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders
F25J 5/00 - Arrangements of cold-exchangers or cold-accumulators in separation or liquefaction plants
16.
METAL COMPOSITIONS AND METHOD FOR TREATING ARTICLE MADE FROM SAID METAL COMPOSITIONS
A metal article including an at least partially heat treated metal composition, and a method for treating the metal article are provided. The metal composition comprises: 0.03 wt% or less of carbon; 1.00 wt% or less of manganese; 0.015 wt% or less of sulfur; 0.03 wt% or less of phosphorous; 1.00 wt% or less of silicon; about 3.50 wt% to about 4.50 wt% of nickel; about 11.50 wt% to about 14.00 wt% of chromium; about 0.40 wt% to about 1.00 wt% of molybdenum; about 0.50 wt% to about 0.3 wt% of copper; about 0.06 wt% to about 0.03 wt% of cobalt; about 0.10 wt% to about 0.05 wt% of tungsten; about 0.05 wt% to about 0.01 wt% of vanadium; about 0.02 wt% to about 0.01 wt% of nitrogen; and a balance of iron and impurities.
A system for attenuating acoustic energy in machines is provided. The system may include an inner tube disposed about a central axis, an outer tube disposed about the inner tube and the central axis, and a middle tube disposed about the central axis and between the inner tube and the outer tube. The system may also include a first annular ring extending radially from the outer tube and configured to couple the outer tube to the middle tube. The system may further include a second annular ring extending radially from the inner tube and configured to couple the inner tube to the outer tube, such that an acoustic resonator may be formed by the first annular ring, the second annular ring, a portion of the inner tube, a portion of the outer tube, and a portion of the middle tube.
Systems and methods for treating a stream comprising hydrocarbons and an aqueousbased liquid are provided. The systems and methods may utilize a media composite comprising a mixture of a cellulose-based material and a polymer. In certain systems and methods, the media composite is capable of being backwashed. The stream comprising the hydrocarbons and aqueous-based liquid may be separated by contacting the stream with the media composite. In certain system and methods, the stream comprising the hydrocarbons and aqueous-based liquid may be coalesced by contacting the stream with the media composite.
A system and method for producing liquefied natural gas are provided. The method may include compressing a process stream containing natural gas in a compression assembly to produce a compressed process stream. The method may also include removing non-hydrocarbons from the compressed process stream in a separator, and cooling the compressed process stream with a cooling assembly to thereby produce a cooled, compressed process stream containing natural gas in a supercritical state. The method may further include expanding a first portion and a second portion of the natural gas from the cooled, compressed process stream in a first expansion element and a second expansion element to generate a first refrigeration stream and a second refrigeration stream, respectively. The method may further include cooling the natural gas in the cooled, compressed process stream to a supercritical state with the first and second refrigeration streams thereby produce the liquefied natural gas.
According to various aspects and embodiments, a system and method for treating a feed stream comprising hydrocarbons, suspended solids, and an aqueous-based liquid is provided. The systems and methods may utilize a stratified multi-media bed that includes at least one layer of a composite media comprising a mixture of a cellulose-based material and a polymer. According to certain aspects, contacting the feed stream with the stratified multi-media bed comprises coalescing and filtering the feed stream. According to at least one aspect, the systems and methods include a draft tube positioned within the stratified multi-media bed that may be utilized for backwashing the layers of filter media.
B01D 24/48 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
A self-adjusting non-contact seal (130) for sealing a circumferential gap comprising: at least one shoe (132); a nozzle (150) extending from an inner surface of said at least one shoe; a first projection (144, 148) extending from said inner surface of said at least one shoe; a second projection (146) extending from said inner; at least one spring element (24); at least one secondary sealing (48, 50).
A method for operating a compressed air energy storage system is provided. The method can include compressing a process gas with a compressor train to produce a compressed process gas and storing the compressed process gas in a compressed gas storage unit. The method can also include extracting the compressed process gas from the compressed gas storage unit to an expansion assembly through a feed line. A valve assembly fluidly coupled to the feed line can be actuated to control a mass flow of the compressed process gas from the compressed gas storage unit to the expansion assembly. The method can further include heating the compressed process gas in a preheater fluidly coupled to the feed line upstream from the expansion assembly, and generating a power output with the expansion assembly.
F17C 7/00 - Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
F17C 13/00 - VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES - Details of vessels or of the filling or discharging of vessels
23.
COMPRESSED AIR ENERGY STORAGE SYSTEM HAVING VARIABLE GENERATION MODES
A method of operating a compressed air energy storage (CAES) system (1) includes operating a compressor train (3w,h() of the CAES system, thereby compressing air. The method further includes, while operating the compressor train: inter-cooling a first portion of the compressed air; further compressing the inter-cooled first portion; after- cooling the further compressed first portion; supplying the after- cooled first portion to a storage vessel; supplying a second portion of the compressed air to a combustor; combusting the second portion; and operating a turbine train (9h,w) of the CAES system using the combusted second portion.
An exhaust gas treatment process, apparatus, and system for reducing the concentration of NOx, CO and hydrocarbons in a gas stream, such as an exhaust stream (29), via selective catalytic reduction with ammonia is provided. The process, apparatus and system include a catalytic bed (32) having a reducing only catalyst portion (34) and a downstream reducing-plus-oxidizing portion (36). Each portion (34, 36) includes an amount of tungsten. The reducing-plus-oxidizing catalyst portion (36) advantageously includes a greater amount of tungsten than the reducing catalyst portion (36) to markedly limit ammonia salt formation.
A method for predicting the remaining useful life of an engine (10) having components (18, 19, 22, 23) that are instrumented with sensors (50) that generate electronic data signals indicative of an operating condition of the component comprises identifying (52) one or more components and at least one failure mode for each component that limit an operating life of the components and engine (10). The method further comprises acquiring (62) and storing data relative to current operating conditions of the components associated with the identified failure mode; and, then determining (68) a remaining useful life of the component based on the data relative to current operating condition of the components, the data relative to historical data of the operating condition associated with the failure mode and a predicted failure mode rate.
Systems and methods for treating a stream comprising a hydrocarbon liquid and an aqueous-based liquid are provided. The systems and methods may utilize a media composite comprising a mixture of a cellulose-based material and a polymer. In certain systems and methods, the media composite is capable of being backwashed. The stream comprising the hydrocarbon liquid and aqueous-based liquid may be separated by contacting the stream with the media composite. In certain system and methods, the stream comprising the hydrocarbon liquid and aqueous-based liquid may be coalesced by contacting the stream with the media composite.
A system and method for monitoring the condition of a vibration sensor in a system. Vibrations are received in the system at one or more vibration sensors. Sensor data is output by the vibration sensor(s). The sensor data includes data representative of the vibrations in the system and data representative of a natural frequency of the corresponding vibration sensor. The sensor data output from the vibration sensor(s) is monitored, and upon a change in the data representative of the natural frequency of a vibration sensor, that vibration sensor is flagged.
A hybrid seal for sealing the circumferential gap (11) between a first machine component and a second machine component comprises at least one shoe (16) extending along one of the machine components in a position to create a non-contact seal, at least one spring element (24) connected between one of the machine components and the shoe (16) and a stack of sealing elements (48, 50) located within a slot (22) formed in the shoe (16) wherein a primary seal and secondary seal of the circumferential gap (11) is created by the shoe (16) in cooperation with the spring element (24) and sealing elements (48, 50) respectively.
A system and method according to which exhaust is directed from a stationary exhaust source and through a burner, and a combustible fluid is vented from at least one combustible fluid source other than the stationary exhaust source. The combustible fluid is captured and directed to flow from the combustible fluid source and towards the burner, and at least air is mixed with the captured combustible fluid to form a mixture. The mixture is introduced into the burner and burned therein to thereby pre-heat the exhaust flowing therethrough. The pre-heated exhaust contacts a catalyst.
F01N 3/36 - Arrangements for supply of additional fuel
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
F01N 3/025 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
A system and method for capturing emissions including a first vent configured to capture a first combustible fluid and an inlet configured to filter a noncombustible, wherein the combustible fluid and the noncombustible fluid are combined to form a diluted stream. A first valve may be in fluid communication with the first vent and the inlet, and the first valve may be configured to receive and control flow of the diluted stream. An engine may be in fluid communication with the first valve and configured to receive and combust the diluted stream.
A method and system for reducing corrosion in a turbomachine. The method may include providing a process gas to a condenser, wherein the process gas contains a condensate having a pH level that is acidic. The condenser may be configured to remove at least a portion of the condensate from the process gas. Any condensate that is not removed is a remaining condensate. The method may further include increasing the pH level of the remaining condensate to above about 4 by mixing the process gas and the remaining condensate with an amount of pH modifier to form a mixture, and directing the mixture to a compressor coupled to the condenser, wherein the compressor is configured to compress the mixture.
The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media.
B01D 24/48 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media.
C02F 1/40 - Devices for separating or removing fatty or oily substances or similar floating material
B01D 24/36 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed fluidised during the filtration
C02F 1/00 - Treatment of water, waste water, or sewage
A seal comprises the combination of a pri-mary seal and a secondary seal each, of which acts on at least one shoe (134) that is installed with clearance rela-tive to one of a rotor and a stator in a position to create a non-contact seal therewith. The at least one shoe is pro-vided with a surface geometry and labyrinth-type teeth that influence the inertia of fluid flowing across the seal, and, hence, the velocity of the fluid and the pressure dis-tribution across the seal, ultimately affecting the balance of forces applied to the seal.
A hybrid brush seal is provided for sealing a circumferential gap between two machine components that are relatively rotatable with respect to each other having seal bristles mounted in a ring shape on a first machine component with bristle ends directed at the sealing surface of the second, rotating machine component. The bristle ends are kept from direct contact with the rotating machine component via one or more shoes which create a non-contact seal with the rotating machine component which is enhanced by the imposition of one or more spring elements connected between the machine component and shoes.
A system and method for the treatment of soot containing an insoluble metal. The soot is formed into a soot slurry and a characteristic of the soot slurry is maintained to solublize at least a portion of the metal to act as a catalyst. The soot slurry with the soluble metal is wet oxidized.
A system and method for the treatment of process streams. A catalyst mediates a wet oxidation process at elevated temperatures and pressures for treating at least one undesirable constituent in an aqueous mixture. A catalyst may be selected for its solubility at a detected pH level of the aqueous mixture. Alternatively, a pH level of the aqueous mixture may be adjusted to solubilize a selected catalyst and/or maintain the selected catalyst in a soluble form. A controller in communication with a pH sensor may be configured to generate a control signal to adjust the pH level of the aqueous mixture in response to the pH sensor registering a pH level outside a predetermined pH solubility range for a selected catalyst.
An indicator device is for sensing a valve of a fluid machine including a casing having an interior chamber, a valve controlling flow into the interior chamber, and a rotatable shaft configured to displace the valve between open and closed positions when the shaft moves between first and second angular positions. A first indicator member, preferably a pinion gear, is coupled with the shaft such that angular movement of the shaft angularly displaces the first member. A second indicator member, preferably a rack gear, is coupled with the first member such that the angular displacement of the first member linearly displaces the second member. The second member linear displacement is generally proportional to angular displacement of the first member. Further, a sensor is configured to sense at least one of linear displacement and linear position of the second indicator member so as to sense the position of the valve.
G01D 5/04 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means using gearing
F01D 17/20 - Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
F16K 31/16 - Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling- or pushing-rod, between fluid motor and closure member
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
A closing element is for a valve assembly of a compressor unloader, the compressor including a casing with a compression chamber, the unloader including a housing defining a chamber. The valve assembly has a base between the compression and unloader chambers, a passage connecting the two chambers, a seat about the passage, and a stem bore within the base having a control chamber. The closing element includes a main body movably disposed within the stem bore and having a sealing surface disposeable against the valve seating surface to obstruct the valve passage and a control end surface within the bore control chamber. A sealing member disposed about the main body prevents flow between the control chamber and the valve passage. The main body and/or the sealing member is configured such that the main body is radially moveable to align the body sealing surface with the valve seat.
A seal ring for a rotatable shaft in a turbo machine includes a seal body configured for disposing around the shaft wherein a radial gap is defined between an inner surface of the seal body and the shaft. An upstream surface defined by the seal body extends from the inner surface, and an annular obstruction extends from the upstream surface of the seal body, wherein the obstruction is spaced away from the inner surface.
Aspects of the invention are directed to an interface (10) between an exhaust cylinder (20) and an exhaust diffuser (22) in a turbine engine. The interface (10) allows relative radial movement of the exhaust diffuser (22) and the exhaust cylinder (20). According to aspects of the invention, the diffuser (22) and the cylinder (20) are operatively connected about their peripheries by a plurality of connecting members, which can be tie rods (40). Each connecting member can be pivotally connected at a first end (42) to a joint bolt (80) affixed to the exhaust cylinder (20) and at a second end (44) to an exhaust diffuser (22). Thus, the connecting members can join the cylinder (20) and the diffuser (22) in the axial direction, while allowing for the differential thermal expansion of the two components. Relative circumferential movement between the cylinder (20) and the diffuser (22) can be reduced by positioning neighboring connecting members at opposing angles in relation to one another.
A transition duct (30) for a gas turbine engine (2) having improved cooling and reduced stress levels. The transition duct may be formed of two panels ((36, 38) joined together with welds (40) disposed remote from the bent corner regions (34) of the panels. Cooling channels (32) extending longitudinally in the direction of flow of the hot combustion gas carried by the duct are formed within each panel, including the corner regions. Because the entire annular width (W) of the transition duct is cooled, the gap (G) separating adjacent ducts around the inlet to the turbine (4) may be reduced when compared to prior art designs. Two-panel construction with welds remote from the corner regions is facilitated by maintaining the minimum bend radius in the corners (R2) and in the direction of flow (R4) to be greater than in prior art designs.
A hybrid brush seal (10) is provided having two bundles (10, 20) of axially spaced seal bristles (18) each of which are mounted in a ring shape on a first machine component (12) with bristle ends (24) directed at a sealing surface of the second, rotating machine component (14). The bristle ends (24) are kept from direct contact with the rotating machine component (14) via one or more shoes (34) which are designed such that as the shaft (14) rotates a hydrodynamic film separates the shoe(s) (34) from the shaft (14). The shoe(s) (34) is attached to the bristle ends (24) at discreet locations. Alternatively, one or more bundles (42) of seal bristles (18) are mounted at one end either to the fixed or rotating machine component (12, 14), with the opposite bristle ends directed toward one or more shoes (34), and wherein one or more spring elements (52) are connected between the machine component and shoes (34).
patents
