Abstract: A wind turbine rotor blade extension fitting element, which extension fitting element is designed as a rotor blade rib with a recess and which can be pushed onto the rotor blade tip of a rotor blade to be extended, in such a way that the rotor blade tip protrudes through the recess and contacts the circumferential surface of the recess in an positive-locking manner. The extension fitting element has, on its outer circumference, an outer circumferential surface onto which a shell-like rotor blade extension can be pushed in an positive-locking manner. A core of the extension fitting element has slits and/or boreholes which, for stabilization, are filled with a material that has a higher strength and/or stiffness than the material of the core. In this way, the extension fitting element is strengthened for the transfer of high loads.

Abstract: A fan includes: a shaft including an outer peripheral surface that includes a first circular-arc portion, and a first flat portion; and a boss portion including a fitting hole with an inner peripheral surface that includes a second circular-arc portion, and a second flat portion. The second circular-arc portion corresponds to the first circular-arc portion. The second flat portion corresponds to the first flat portion. One or both of the first flat portion and the second flat portion includes a notch in an end portion in a width direction of the one or both of the first flat portion and the second flat portion.

Abstract: A sparcap for a spar structure inside a wind turbine blade is provided. A down conductor element is integrated on a side of the sparcap such that after assembly of the sparcap into the spar structure, the down conductor element extends along an outer corner of the spar structure.

Abstract: An exhaust system includes a supercharger, a first communication path, a negative pressure generator, and an exhaust sensor. The supercharger includes a turbine and compressor. The turbine is provided in an exhaust pipe of an engine. The compressor is provided in an intake pipe and coupled to the turbine by a shaft. The supercharger supercharges intake air using energy of exhaust air. The first communication path communicates with the exhaust pipe on a downstream side of the turbine and communicates with the intake pipe on an upstream side of the compressor. The exhaust pipe and the intake pipe communicate through the first communication path. The negative pressure generator is interposed in the first communication path and generates a negative pressure. The exhaust sensor is provided in the first communication path between a location where the first communication path is coupled to the exhaust pipe and the negative pressure generator.

Abstract: An article includes a substrate formed of a molybdenum-based alloy. A barrier layer is disposed on the substrate. The barrier layer is formed of at least one noble metal.

Abstract: A coil-on-plug (COP) exciter includes a COP and a housing configured to be coupled to and positioned at least partially between the COP and an engine. The COP exciter also includes an electrode core positioned at least partially within the housing. The electrode core has a first end and a second end. The first end is configured to be coupled to the COP. The COP exciter also includes an electrode tip configured to be coupled to the second end of the electrode core. A voltage is conducted from the COP, through the electrode core, and to the electrode tip, which generates a spark that is configured to energize a first propellant to start the engine.

Abstract: Among other things, the present disclosure relates to a wind turbine rotor blade that can be assembled at the site of its wind turbine. The blade includes an internal structure which may be pre-fabricated with connections to the shell skin prior to being transported to the site of its wind turbine. A filler material may be injected into the layers of fabric making up the shell skin at the wind turbine site and allowed to harden at approximately atmospheric conditions.

Abstract: The invention relates to a wind turbine blade being a shell body made of a composite material and having a root end and a tip end, an outer surface, a pressure side and a suction side, a trailing edge and a leading edge, and additionally a lightning protection system. The lightning protection system comprising at least one lightning receptor provided with an outer surface arranged freely accessible in, on or at the outer surface of the blade at the tip end of the blade and a lightning conductor made of electrically conductive material extending within the shell body along substantially the entire longitudinal direction of the blade. The lightning receptor and the lightning conductor are electrically connected by means of a connection area. At least a part of the outer surface, optionally the whole of the outer surface of the receptor being freely accessible is formed of carbon such as graphite.

Abstract: A well pumping apparatus including a discharge head (110), a drive string rod (130) in fluid communication with an inner cavity (142) of a production tubing (140), a pre-lubrication port (160) at the discharge head, and lubrication cups (134) installed along the drive string rod adjacent to sets of bearings (150) distributed along the drive string rod.

Abstract: A rotor for an aircraft rotary engine includes a rotor body. The rotor body extends about an axial centerline. The rotor body includes an outer body portion, an annular inner body portion, and ribs. The outer body portion forms a plurality of sides and a plurality of apex portions of the rotor. The annular inner body portion is disposed radially inward of the outer body portion. The ribs extend radially between and connect the outer body portion and the annular inner body portion. The rotor body forms at least a first lubrication passage within the inner body portion and within a first rib of the ribs. The first lubrication passage includes at least one passage inlet and at least one passage outlet. The at least one passage inlet is disposed at the annular inner body portion.

Abstract: A centrifugal compressor comprises: an impeller; an inlet pipe portion forming an intake passage to introduce air to the impeller; and a throttle mechanism capable of reducing a flow passage area of the intake passage upstream of the impeller. The throttle mechanism includes an annular portion configured to move between a first position and a second position upstream of the first position in an axial direction of the impeller. In a cross-section along a rotational axis of the impeller, an outer peripheral surface of the annular portion is formed to smoothly connect a leading edge and a trailing edge of the annular portion.

Abstract: A spiral orbiting wrap of an orbiting scroll is meshed with a spiral fixed wrap of a fixed scroll. A first compression chamber is formed by an inner wall surface of the orbiting wrap and an outer wall surface of a fixed wrap. A second compression chamber is formed by an inner wall surface of the fixed wrap and an outer wall surface of the orbiting wrap. The orbiting base plate of the orbiting scroll includes a first through hole capable of communicating the first compression chamber with the back pressure chamber and a second through hole capable of communicating the second compression chamber with the back pressure chamber. The first compression chamber communicates with the back pressure chamber via the first through hole prior to the communication of the second compression chamber with the back pressure chamber via the second through hole.

Abstract: A rotary engine comprised of a pair of counterrotating rotors within a non-rotating outer housing. Each of the rotors is coupled to a common power shaft, one directly and the other through a reversing gear arrangement. Both are driven by the hyper-expansion of combustion gases in a repeating combustion cycle. Each has a generally circular, nearly frictionless working surface perpendicular to the power shaft axis. Each rotor surface defines chambers which rotate past each other. Within such chambers, compressed air and fuel are introduced, mixed, ignited, allowed to hyper-expand (and thus cause the rotation) and exhausted. The power shaft may be connected to a conventional clutch, torque converter, gearbox, differential, alternator or a similar system.

Abstract: A scroll fluid machine includes: a fixed scroll 11 having a helical wrap 16; an orbiting scroll 12 having a helical wrap 21; a drive shaft 13 that causes the orbiting scroll 12 to orbit relative to the fixed scroll 11; and a helical tip seal 29A inserted into a seal groove 28A of the wrap 21. The tip seal 29A has: a groove 36A that has an opening at a central portion of a sliding surface 30 in the seal width direction; and a communication groove 37A communicating between the inside of the groove 36A and a working chamber SH on the inner side in the wrap width direction. In groove 36A the differential pressure (PH-PL) is equal to or higher than 0.1 Mpa between the working chamber SH and a working chamber SL on the outer side in the wrap width direction.

Abstract: A method is provided for an engine. During this method, a saturation current of a gas flow is measured. The gas flow includes combustion products generated by the engine. The saturation current is monitored to determine presence of debris entrained within the gas flow.

Abstract: A method for abrasive flow machining includes moving an abrasive media through a high-aspect passage of a workpiece. Local pressure of the abrasive media is increased at target abrasion surfaces of the high-aspect passage using a passage geometry that is configured to direct flow of the abrasive media into the target abrasion surfaces such that the target abrasion surfaces are preferentially polished by the abrasive media over other, non-targeted surfaces of the high-aspect passage at which the flow of the abrasive media is not directed into.

Abstract: The invention relates to a stabilizer channel, in particular of a radial compressor or diagonal compressor, having an annular stabilizer chamber which encloses a main flow channel in the intake region of a compressor wheel and is delimited from the main flow channel by an annular bridge. The annular stabilizer chamber is bladeless and is connected to the main flow channel via a downstream inlet channel and an upstream outlet channel. A plurality of flow directing elements are arranged in the downstream inlet channel. The downstream inlet channel is arranged between an upstream part of the annular bridge and a downstream part of the annular bridge. The invention furthermore relates to a compressor, in particular a radial compressor or diagonal compressor, comprising the stabilizer channel according to the invention and to a turbocharger comprising the compressor.

Abstract: A double-layer reverse rotation vertical shaft power machine adopting a horizontal combined movable wing relates to the technical field of green energy generating sets, which includes main body devices, movable wing devices, transmission devices and a self-clutch device; each movable wing device includes combined wings vertically arranged along the circumferential direction of the main body devices, each combined wing includes combined shafts and combined movable wings connected to the combined shafts, and the combined shafts vertically arranged along the circumferential direction are alternately arranged according to the axial length. The combined shafts that are alternately distributed along the circumferential direction in turn can effectively stagger the adjacent combined movable wings and avoid the mutual interference between the adjacent combined movable wings, thereby reasonably using all combined movable wings, fully obtaining the outside potential energy and improving the efficiency.

Abstract: A submersible pump assembly. The submersible pump assembly comprises a motor comprising a first drive shaft; a seal section comprising a second drive shaft that is coupled to the first drive shaft of the motor; and a centrifugal pump assembly comprising a third drive shaft that is coupled to the second drive shaft of the seal section and a plurality of pump stages, wherein each pump stage comprises an impeller coupled to the third drive shaft and a diffuser retained by a housing of the centrifugal pump assembly, wherein the diffuser of each pump stage comprises a first plurality of vanes each having a first axial length and a second plurality of vanes each disposed between a pair of vanes of the first plurality of vanes and each having a second axial length, wherein the second axial length is less than the first axial length.

Abstract: A variable cam timing phaser includes a housing disposed about an axis and having an inner housing surface defining a housing interior. The variable cam timing phaser includes a rotor moveable between an advance position and a retard position. The rotor includes a hub and a vane, with the rotor and the housing defining a chamber. The vane further defines the chamber into an advance chamber and a retard chamber. The variable cam timing phaser also includes a control valve assembly including a valve housing and a control piston. The variable cam timing phaser also includes a chamber biasing assembly disposed in one of the advance and the retard chambers and configured to bias the rotor into a predetermined position between the advance and the retard positions. The chamber biasing assembly includes a chamber piston, a chamber biasing member, and a chamber check valve.