Abstract: An accessory tool for an extraction cleaner having an accessory hose, a fluid delivery system, and a fluid recovery system includes a lens, a tool body, a spray tip, and a cleanout assembly. The tool body is connectable to the fluid delivery system and the fluid recovery system via the accessory hose. The lens couples to the tool body to form a suction nozzle volume therebetween. The tool body defines a fluid channel opposite the lens. The spray tip dispenses a cleaning fluid from the fluid delivery system onto a surface during a spray cycle of the extraction cleaner. The cleanout assembly selectively diverts the cleaning fluid from the spray tip and into the suction nozzle volume via the fluid channel during a clean out cycle of the extraction cleaner to thereby clean the lens and the accessory hose.

Abstract: A hydrogen production plant, to produce hydrogen having a compressing assembly, for increasing the pressure of the hydrogen. The compressing assembly has at least one barrel compressor and at least one integrally geared centrifugal compressor. Also disclosed are methods of compressing hydrogen.

Abstract: A fan case assembly comprises a fan track liner, an annular case, and a tip injection system. The fan track liner includes a forward end, an aft end axially aft of the forward end, and an inner radial surface that extends between the forward and aft ends to define a gas path. The tip injection system includes an air recirculation duct configured to direct a portion of gases flowing through the gas path from the aft end of the fan track liner into the gas path adjacent the forward end of the fan track liner and a thermal conditioner in thermal communication with the air recirculation duct. The thermal conditioner includes phase change material configured to extract heat from the portion of gases flowing through the air recirculation duct to cool the portion of gases and minimize thermal distortion induced by the portion of gases.

Abstract: An improved variable geometry diffuser (VGD) mechanism for use with a centrifugal compressor. This VGD mechanism extends substantially completely into the diffuser gap so that the VGD mechanism may be used more fully to control other operational functions. The VGD mechanism may be used to minimize compressor backspin and associated transient loads during compressor shut down by preventing a reverse flow of refrigerant gas through the diffuser gap during compressor shutdown, which is prevented because the diffuser gap is substantially blocked by the full extension of the diffuser ring. During start-up, transient surge and stall also can be effectively eliminated as gas flow through the diffuser gap can be impeded as load and impeller speed increase, thereby alleviating the problems caused by startup loads at low speeds. The VGD mechanism can be used for capacity control as well so as to achieve more effective turndown at low loads.

Abstract: A conformable cover plate can be used to provide a barrier layer between ceramic matrix composite (CMC) components of jet engines and metallic ancillary hardware that is used, for example, to support the CMC components within the engine. The cover plate conforms to a structure feature of the CMC component that will be in close proximity to the ancillary hardware. By acting as a barrier layer, the conformable cover plate can reduce abrasion of the CMC material and/or prevent or ameliorate undesired chemical interactions between SiC-containing CMCs and Ni-based metals. Further, the conformable cover plate can act as a heat shield to lower heat transfer between CMC components and the ancillary hardware.

Abstract: A turbine engine module of longitudinal axis X, including an unducted propeller intended to be rotated around the longitudinal axis X by a power shaft which is connected at least to a rotor member, at least one flow straightener including a plurality of stator vanes extending along a radial axis Z, at least one first casing mounted upstream, along the longitudinal axis, of the rotor member and a second casing mounted downstream, along the longitudinal axis, of the rotor member. The stator vanes each include a root housed in a sleeve which is connected to the first casing and to the second casing.

Abstract: An oscillating sanding machine includes a base column, an oscillating sanding spindle, a conveying unit, a first driving unit, a second driving unit, and a third driving unit. The first driving unit is for driving a rotating shaft of the oscillating sanding spindle to rotate about an axis it extends and the second driving unit is for driving the oscillating sanding spindle to move to and fro along the axis and perform oscillation. The conveying unit is located under the oscillating sanding spindle and separated from the oscillating sanding spindle by a predetermined distance. The third driving unit is mounted on the base column and connected to the conveying unit, so as to drive the conveying unit. The oscillating sanding machine provides high-precision control and ensures surface uniformity of sanded workpieces.

Abstract: One embodiment of the present invention provides a technology that optimally designs a single-channel pump and improves performance such as high efficiency and low vibration of the single-channel pump.

Abstract: A workpiece plating treatment method includes the steps of providing a pulse laser having a plurality of different energy levels, adjusting the pulse laser to the plurality of different energy levels, and scanning a plating layer of a workpiece with the pulse laser at the plurality of different energy levels to effect different changes on the plating layer. The different energy levels include an activation energy level, a temperature rise energy level, a constant temperature energy level, a melting energy level, a cooling energy level, and a polishing energy level.

Abstract: A blade shell assembly for a wind turbine blade shell is described. The blade shell assembly includes a first element (200) having a first mating surface (201) and a second element (300) having a second mating surface (301). The first mating surface (201) and the second mating surface (301) are adapted for abutting on each other in an assembled state. The second element (300) includes one or more grooves (310) able to generate a spring effect to close a gap (450) between the first element (200) and the second element (300), the gap (450) extending substantially in a direction (402) substantially perpendicular to the second mating surface (301) or the first mating surface (201). Further, a method for building a blade shell of a wind turbine blade and a wind turbine blade are described.

Abstract: A rotor system comprising at least a rotor adapted to rotate with respect to a stator, the rotor system further comprising a densifier adapted to densify gas of an upstream volume by an average density rise of at least about 1%, wherein the cross-section area of the volume is the rotor sweeping area and the depth of the volume is at least about one millimeter.

Abstract: The hydraulic system includes a reservoir configured to store hydraulic fluid, an actuator, a first conduit coupling the reservoir to the actuator, a second conduit having a first end and a second end, a first valve positioned between the first end of the second conduit and the first conduit, a second valve positioned between the second end of the second conduit and the first conduit, and a pump configured to drive the hydraulic fluid from the reservoir to the actuator. The hydraulic fluid flows through the first conduit to the actuator when the first valve is in a first position. The hydraulic fluid flows partially through the first conduit, through the second conduit, back to the first conduit, and to the actuator when the first valve is in a second position.

Abstract: A detuning ring includes first and second axial faces, and is for detuning a structural resonance in a pump assembly. The first axial face includes first lands and first grooves, each first land extending in a radial direction and including a planar first top face, and each first groove delimited by two adjacent first lands and the first axial face. The second axial face includes second lands and second grooves, each second land extending in the radial direction and including a planar second top face, each second groove delimited by two adjacent second lands and the second axial face. The detuning ring is to be arranged between the drive unit and the hydraulic unit of the pump assembly, and is to be fixed relative to the drive unit or the hydraulic unit.

Abstract: A three-dimensional woven fabric for a composite component and methods of manufacturing such a fabric. The woven fabric has a first region, and a second region and a plurality of reinforcing fiber tows woven together in a three-dimensional pattern such that the woven fabric has a warp direction, a weft direction, and a thickness direction. The reinforcing fiber tows include a plurality of warp fiber tows and a plurality of weft fiber tows. At least a portion of the plurality of reinforcing fiber tows provided in the first region includes bulk fiber tows having a first toughness. At least a portion of the plurality of reinforcing fiber tows provided in the second region includes tough fiber tows having a second toughness. The second toughness of the tough fiber tows is greater than the first toughness of the bulk fiber tows.

Abstract: An assembly adapted for use in a gas turbine engine includes a blade track segment, a carrier segment, and a pin. The blade track segment defines a portion of a gas path of the gas turbine engine. The carrier segment supports the blade track segment to locate the blade track segment radially outward of the axis. The pin couples the blade track segment to the carrier segment. The carrier segment may include cooling passageways to conduct cooling air to preselected cooling areas located on the blade track segment.

Abstract: An impeller includes a hub, an outer ring, a plurality of first blades and a plurality of second blades. The plurality of first blades are arranged around the hub at intervals. Each of the plurality of first blades passes through the outer ring, extends inward from the outer ring, and is connected to the hub. The plurality of second blades are arranged around the hub at intervals. Each of the plurality of second blades passes through the outer ring. At least one of the plurality of second blades is disposed between the plurality of first blades. Each of the second blades includes a guiding portion, which is an inclined plane disposed on an inner end, and extends obliquely downward toward the hub. A length of each of the plurality of second blades is between 10% and 45% of a length of each of the plurality of first blades.

Abstract: A gas turbine engine is provided that includes a compressor section, a combustor section, and a turbine section. The turbine section includes a rotor stage and an annular shroud assembly. The rotor stage includes a bladed rotor. The annular shroud assembly is disposed radially outside of the bladed rotor, and extends circumferentially around the bladed rotor, and is coupled with a turbine support case. The annular shroud assembly includes a shroud, a shroud segment housing, a cover, and a plurality of shroud pins. The shroud includes a plurality of shroud segments that collectively form the shroud. Each shroud segment includes a ring portion, a forward leg, and an aft leg. The shroud pins are disposed to connect the shroud to the shroud segment housing and the cover. The shroud segment housing and the turbine support case are engaged with one another and are configured to permit relative movement therebetween.

Abstract: A ceramic matrix composite (CMC) blade outer air seal (BOAS) segment includes a preform having a base layup formed of one or more fabric plies folded to form a first rib portion, a shoe portion having an upstream fold edge and a downstream fold edge, and a second rib portion. One or more pre-densified CMC tubes are disposed circumferentially between the first rib portion and the upstream fold edge and between the second rib portion and the downstream fold edge, respectively. An outer wrap formed of one or more fabric plies is disposed to overwrap the first rib portion, the one or more pre-densified CMC tubes disposed circumferentially between the first rib portion and the upstream fold edge, the upstream fold edge, the downstream fold edge, the one or more pre-densified CMC tubes disposed circumferentially between the second rib portion and the downstream fold edge, and the second rib portion.

Abstract: A method of determining an angular position of a nacelle of a wind turbine is provided, the nacelle being rotatably mounted at an upper end of a tower, the lower end of the tower being supported by a foundation. The method includes obtaining and storing a foundation angular position corresponding to a foundation reference point, the foundation angular position being relative to true north, determining a tower angular position based on the foundation angular position and information indicative of an angular relation between foundation and tower, the tower angular position corresponding to a tower reference point, receiving an encoder signal indicative of the angular position of the nacelle, detecting that a sensor mounted to the nacelle is the encoder signal such that the indicated angular position of the nacelle corresponds to the tower angular position. Furthermore, a controller for a wind turbine, a wind turbine, and a wind farm are provided.

Abstract: A centrifugal fan includes a first portion provided in a rotor, and a second portion provided in a fan unit and having a greater linear coefficient of expansion than that of the first portion. The first portion has a first top portion and a first tubular portion. The second portion has a second top portion and a second tubular portion. The second tubular portion has an inner tube surface facing an outer tube surface of the first tubular portion with a first clearance therebetween. The first top portion has a first flat surface, and the second top portion has a second flat surface facing the first flat surface. The first top portion or the second top portion is provided with a protrusion. The first flat surface and the second flat surface are bonded and fixed to each other with an adhesive provided in a second clearance formed by the protrusion.