Abstract: A driver circuit for a fuel injector is provided. The fuel injector is connected to an Engine Control Module (ECM) having a high-side terminal and a low-side terminal. The driver circuit includes a fault detection system for detecting a short-to-ground fault. The fault detection system includes a first module to measure a forward current flowing through the high-side terminal of the ECM and a second module to measure a return current flowing through the low-side terminal of the ECM. Further, the fault detection system includes a third module to compute a differential current based on the forward current and the return current. The fault detection system includes a fourth module to compare the differential current with a threshold current, and trigger a fault and interrupt the flow of the forward current when the differential current is greater than the threshold current.

Abstract: A holder of a fuel injection valve is press-inserted to a housing of the fuel injection valve so as to be fixed to the housing, a cap of the fuel injection valve includes a notch portion for notching an annular portion, and is arranged in such a way that an inner circumference surface of the cap is faced to an outer circumference surface of a core of the fuel injection valve via a gap, and an electrode terminal of the fuel injection valve is connected to a terminal of a solenoid of the fuel injection valve via the notch portion of the cap.

Abstract: A control unit according to the present invention performs an automatic stop control in which an injection of fuel from a fuel injection valve is stopped to stop a rotation of an engine when an automatic stop condition is satisfied. Furthermore, the control unit performs a first injection, in which fuel is injected from the fuel injection valve of a cylinder in an expansion stroke, and an ignition operation for igniting the fuel injected by the first injection, when a restart demand occurs after an initiation of the automatic stop control. In addition, the control unit performs a second injection, in which fuel is injected from the fuel injection valve of a cylinder in a compression stroke, and an ignition operation for igniting the fuel injected by the second injection.

Abstract: When normal operation is detected by a self-interruption signal source and a first transistor is on, if an on-signal is inputted to an IN terminal, a second transistor is turned on and a third transistor is turned off. Accordingly, an IGBT is turned on. In this state, if an abnormality is detected by the self-interruption signal source, the second transistor is turned off and the third transistor is turned on. Accordingly, a gate terminal of the IGBT is connected to an emitter terminal via the first and third transistors, and charges accumulated by gate capacitance of the IGBT are rapidly discharged. Consequently, if a comparator detects that a collector voltage of the IGBT has exceeded a predetermined voltage, the first transistor is turned off, and a gradual interruption, in which the charges accumulated by the gate capacitance are gradually released by a resistor, is performed.

Abstract: A microwave spark plug for injecting microwave energy into a combustion chamber of an engine including an elongated housing, including an elongated chamber forming a hollow conductor in an interior of the housing, and including a microwave window arranged at a first end of the chamber in the housing, wherein the microwave window closes the hollow conductor relative to the combustion chamber, wherein the hollow conductor includes a connection element for a high frequency feed conductor at a second end arranged opposite to the microwave window, wherein the connection element includes a high frequency inlet cross section geometry which differs from a high frequency outlet cross section geometry at the microwave window. The microwave sparkplug is configured to be threaded into typical boreholes for sparkplugs and facilitates safe injection of microwave energy into a combustion chamber of an internal combustion engine.

Abstract: A method for introducing microwave energy into a combustion chamber of a reciprocating internal combustion engine with at least one cylinder with a cylinder head in which the microwaves reach the combustion chamber through a microwave window, wherein the microwaves are run about a circumference of the combustion chamber and radially injected into the combustion chamber through at least a portion of a combustion chamber wall functioning as a microwave window. The method and the internal combustion engine facilitate a precise control of a beginning of a space ignition of a fuel air mix in the combustion chamber so that an optimum low emission combustion of a fuel is achieved with an efficiency that is higher compared to conventional reciprocating piston combustion engines. In general the invention provides safe ignition of lean fuel air mixtures.

Abstract: A method for introducing microwave energy into a combustion chamber of an internal combustion engine in which the microwaves reach a combustion chamber through a microwave window, wherein the microwaves are run about a circumference of the combustion chamber and radially coupled into the combustion chamber after passing through the microwave window. Accordingly a device for introducing microwave energy into the combustion chamber of a reciprocating piston internal combustion engine with at least one cylinder with a cylinder head and a combustion chamber in the cylinder includes at least one circumferential annular hollow conductor cavity extending about the combustion chamber and including at least one feed for the microwave and at least one outlet opening for the microwave arranged between the annular hollow conductor cavity and the combustion chamber. An internal combustion engine includes the features of the device.

Abstract: A device, system, and method for recirculation of water and energy generation comprises a reservoir and a device that facilitates water flow from the reservoir. The system is used to implement a method for energy generation. The device is configured to minimize friction by utilizing hydrophobic coatings on the inner walls of the device. One-way valves prevent water that has entered the device from going back onto the water reservoirs. Hydrophilic and hydrophobic interactions are further utilized to maintain the water flow. The system then generates a circulating water fall that is used to drive an electrical generator or similar device, such as turbines and dynamos, to generate electricity.

Abstract: A wave activated electric power generating system is durable even if exposed to a rainstorm, extremely simple in structure and highly efficient. A motion transfer medium rendering the rotary part of an electric generator less liable to produce slipping and a rotation transform member adapted to rotate while fitting with the motion transfer medium in movement are also provided. The system includes a buoy floating on the sea or lake so as to move up and down with the waves, and an underwater motion restrainer suspended underwater by water resistance, or submerged by its own weight on the sea or lake floor. Vertical movement of the buoy relative to the underwater motion restrainer is converted and transferred by the motion transfer medium in the form of an elongate rope vertically moving under the weight of an element to operate the rotary electric generator securely connected to the buoy.

Abstract: The safety structure comprises temporarily deployable safety bars that can be attached to a support member associated with at least one of a wind turbine hub, a wind turbine blade, a wind turbine root section, a wind turbine yaw mechanism, a wind turbine tower base, a wind turbine foundation, and a wind turbine nacelle. The bars can be coupled with each other and the structure may comprise at least one inflatable portion. The safety bars are first attached to the support member surrounding a wind turbine portion and then coupled to each other defining a fence structure.

Abstract: Wind turbine blades comprising one or more deformable trailing edge sections having a multistable sheet comprising a plurality of bistable elements, each bistable element having two stable positions, wherein the multistable sheet is attached in a cantilever manner to a structural portion of the blade and extends in a chordwise direction, and the multistable sheet is connected to a skin of the blade such that upon changing one or more bistable elements from one stable position to the other stable position a shape of the trailing edge section changes. The application further relates to wind turbines comprising such blades and methods of controlling loads on the blades.

Abstract: The present subject matter is directed to a system and method for operating a wind turbine so as to increase power production by utilizing variable tip-speed-ratio control. In one embodiment, the method includes defining a first operating region associated with an unsaturated torque range and a second operating region associated with a saturated torque range. Further, the method includes monitoring a torque output of the wind turbine. The method also includes continuously adjusting a tip-speed-ratio set point of the wind turbine so as to operate the wind turbine along a torque constraint boundary of the first and second operating regions.

Abstract: Systems and methods for controlling a wind turbine based on sensor readings are provided. A signal path between a sensor and a turbine controller can be modified and a secondary controller can be inserted between the turbine controller and the sensor. The secondary controller can receive a signal from the sensor and adjust the signal to an adjusted signal. The adjusted signal can be communicated to the turbine controller which can control operation of the wind turbine based at least in part on the adjusted signal. In this way, the operation of the wind turbine based on various sensor readings can be adjusted to provide for increased energy production without requiring access to computer-readable instructions, such as source code, implemented by the wind turbine controller.

Abstract: The present disclosure is directed to a system and method for reducing noise associated with a wind turbine, more particularly fan noise when the wind turbine is operating under a reduced noise operating mode. More specifically, the method includes operating the wind turbine at a predetermined rotor speed that is associated with a predetermined power output. The method also includes receiving a request to operate in a reduced noise operating mode and in response to the request, reducing the predetermined rotor speed so as to provide a reduced power output. In response to reducing the predetermined rotor speed, another step includes reducing a speed of one or more cooling fans of the wind turbine.

Abstract: Systems and methods for controlling the pitch angle of rotor blades in a wind turbine are provided. A signal path between a turbine controller and a pitch of a wind turbine can be broken r modified and a secondary controller can be inserted between the turbine controller and the pitch system. The secondary controller can receive a pitch angle setpoint from the turbine controller and adjust the pitch angle setpoint to an adjusted pitch angle setpoint. The adjusted pitch angle setpoint can be communicated to the pitch system. In this way, the pitch angle setpoints for the wind turbine can be adjusted to provide for increased energy production without requiring access to computer-readable instructions, such as source code, implemented by the wind turbine controller.

Abstract: The present disclosure is directed to systems and methods for validating wind farm performance improvements so as to optimize wind farm performance. In one embodiment, the method includes operating, via a controller, the wind farm in a first operating mode. Another step includes collecting a first set of operating data, via a processor, during the first operating mode. A further step includes operating, via the controller, the wind farm in a second operating mode. The method also includes collecting a second set of operating data, via the processor, during the second operating mode. Next, the method includes normalizing the first and second sets of operating data based on wind speed distributions. As such, another step includes comparing, via the processor, the normalized first and second sets of operating data so as to validate one or more wind farm performance measurements.

Abstract: The present invention relates to a support device, more particularly a structural part of a tower construction for mounting a wind turbine, comprising: at least one elongated structural member (102) comprising one or more voids (104) extending over a substantial height of said elongate structural member (102); and a granular core filling material (103) filling at least one of the one or more voids (104) over a substantial height of said elongated structural member (102), wherein the granular filling material (103) is in engagement with the structural member (102) such that it exerts a pressure and provides stiffness against deformation on the surrounding structural member (102). The invention further relates to a tower construction, comprising at least one such support device, as well as methods for improving and constructing such a support device.

Abstract: A joint structure includes: an output side transmission shaft which rotates integrally with an output shaft of a speed increaser; an input side transmission shaft which rotates integrally with an input shaft of the speed increaser; a fixed housing; a bearing; and a one-way clutch which is fitted in the fixed housing. The one-way clutch integrally rotatably connects the output side transmission shaft and the input side transmission shaft under a condition where a rotation speed of the output shaft is higher than a rotation speed of the input shaft, and releases the connection between the output side transmission shaft and the input side transmission shaft under a condition where the rotation speed of the output shaft is lower than the rotation speed of the input shaft.

Abstract: A system may include an actuation member having a first end and a second end. A length of the actuation member is greater than a width of the actuation member. The length extends from the first end to the second end along a longitudinal axis when the actuation member is undeformed. The actuation member may include a magnetic shape memory alloy. The system may further include an anchor retaining the first end of the actuation member. The second end of the actuation member may be free to move laterally to the longitudinal axis in response to a deformation of the actuation member. The system may also include a magnetic field source in proximity to the actuation member. The magnetic field source may be configurable to alter a magnetic field applied to the actuation member to adjust the extent of deformation of the actuation member.

Abstract: Hall thrusters with conductive coatings are disclosed. A Hall thruster comprises magnetic shielding in order to avoid collisions with the inner walls of its discharge chamber. By removing the source of erosion, the walls of the chamber can be removed reducing mass, cost and complexity of the thruster. A conductive coating, such as an aluminum coating, is deposited on inner screens between the discharge chamber and the magnetic poles of the thruster. The magnetic field within the chamber shields the conductive coating deposited on the inner and outer screens of the chamber.

Abstract: A system (300) for coupling a piston for a hydraulic pump motor is provided for a hydraulic pump motor which includes a central rotor (3) of a pump motor which houses a hydraulic cylinder (14) inside of which a hydraulic piston (13) moves in translation and can push a tappet (18) guided by a hydraulic piston guided in translation by a tappet guide (19), the system (300) including a connection shaft (301) integral by a first end of the tappet (18) guided by a hydraulic piston and traversing the hydraulic piston (13) in the direction of its length via an orifice (307) of the connection shaft whereas a retention spring (304) is supported on the connection shaft (301) in the vicinity of a second end for maintaining this piston (13) in contact with the tappet (18) guided by the hydraulic piston.

Abstract: Provided is a flow control apparatus including a flow passage having a tube pump placed therein, a flow meter placed downstream of the tube pump in the flow direction, the flow meter measuring a flow rate of liquid passing the flow passage, and a flow controller controlling a liquid output of the tube pump so that the flow rate measured by the flow meter matches a target flow rate. The flow passage includes a straight tubular second flow passage that is flexible to be elastically deformed by the pressure of the liquid, the second flow passage being placed downstream of the tube pump in the flow direction, and a third flow passage at which a cross-sectional flow area of the flow passage in a plane orthogonal to the flow direction is smallest, the third flow passage being placed downstream of the second flow passage in the flow direction.

Abstract: A fluid system is provided including a fluid pump having an output and an electric motor coupled to the fluid pump. The electric motor is adapted to operate the fluid pump in response to an electrical signal. A controller adapted to communicate the electrical signal to the electric motor, the controller including an initial lookup table having initial performance data related to the fluid pump and the electric motor. The initial performance data from the initial lookup table and sensed performance data applied to a modifiable lookup table are used by the controller to set aspects of the electrical signal communicated to the electric motor to achieve a desired system pressure generated by the fluid pump.

Abstract: Embodiments of improved pump systems and methods of using the same are disclosed herein. Embodiments described herein are well-suited, for example, for use in the methods of artificial lift in oil wells and for the purpose of deliquification of gas wells, among other uses. Embodiments of the disclosed pump systems may comprise one or more pump assemblies connected in parallel via shared low- and high-pressure conduits.

Abstract: An inflator includes a box and a compressor unit installed in the box. The box is composed of a cover and a base, which are respectively provided with upper and lower airflow-guiding members, which can quickly guide the air current generated by a cooling fan of the compressor unit to enter the motor's housing via two openings of the housing and to flow out of the motor's housing via downstream through holes of the housing, thus dissipating the heat generated by a rotor assembly in the motor, so that heat is not easy to accumulate in the motor, so that maximum power output of the motor can be achieved, and the performance and service life of the motor can be increased.

Abstract: An electric compressor includes a compression mechanism for compressing a fluid, an electric motor for driving the compression mechanism, an inverter for driving the electric motor, a housing for housing the compression mechanism and the electric motor, a cover attached to the housing to house the inverter between the cover and the housing, and an impact-resistant member attached to the housing. The impact-resistant member includes a projecting portion arranged at a position spaced from the cover and the housing, and a spacer portion extending from the projecting portion toward the housing. The spacer portion is bonded to the housing to straddle an outer periphery of the cover. The impact-resistant member is attached to the housing by bonding the spacer portion to the housing.

Abstract: The present invention relates to a high-pressure pump, and belongs to the manufacturing field of high-pressure pumps. A high-pressure pump includes a pump cover, an air cylinder, a piston, a water cooling device, and a pump seat. The air cylinder is formed by a first air cylinder, a second air cylinder and a third air cylinder whose diameters are progressively reduced and that are coaxially disposed. The piston is also formed by a first piston, a second piston and a third piston whose diameters are progressively reduced and that are respectively disposed in the first air cylinder, the second air cylinder and the third air cylinder.

Abstract: A valve clack is provided. The valve clack includes: a mounting column (11) having a plurality of air slots (111) for dispersing an airflow at least in a top surface of the mounting column (11); a plurality of blades (12) arranged outside the mounting column (11) in a circumferential direction of the mounting column (11), each blade (12) having a radial inner end connected to the mounting column (11) and elastically swingable with respect to the mounting column (11).

Abstract: A pump apparatus includes a shaft, a first pump, and a second pump. The first pump includes a first driving gear disposed on the shaft in a first phase and rotatable with the shaft to feed a first operating fluid. The second pump includes a second driving gear disposed on the shaft in a second phase shifted from the first phase. The second driving gear is coaxial with the first driving gear and rotatable with the shaft to feed a second operating fluid.

Abstract: An oil pump, includes an inner rotor having outer teeth; an outer rotor having inner teeth which form cells together with the outer teeth, the outer rotor rotating with a prescribed amount of eccentricity with respect to the center of rotation of the inner rotor; an outer ring which causes the center of rotation of the outer rotor to swing along a fan-shaped rotation trajectory having a radius equal to the amount of eccentricity, with respect to the center of rotation of the inner rotor; an operating means which causes a swinging movement of the outer ring; and a pump housing which has a rotor chamber having an intake port and a discharge port, the portion between a final end section of the intake port and a start end section of the discharge port being taken to be a first sealing land.

Abstract: A gear pump has a toothed driving wheel, a toothed driven wheel, a front flange from which a projecting portion of the shaft protrudes, being connected to the shaft of the driving wheel, a back lid fixed to the case, and an intermediate flange between the case and the front flange. The intermediate flange has first and second chambers connected by a connection duct to the inlet or outlet fluid duct of the pump. A compensating ring is mounted in the first chamber and inserted on the shaft of the driving wheel to compensate the axial forces of the driving wheel and transmit the motion on the shaft of the driving wheel. A piston is mounted in the second chamber in order to stop against one end of the shaft of the driven wheel, in such manner to compensate the axial forces imposed on the toothed driven wheel.

Abstract: An improved discharge port of a rotary screw compressor is described. A discharge port of a screw compressor generally includes a restrictive portion to help prevent a leakage of working fluid back to a suction side of the compressor. The improved discharge port is configured to have a restrictive portion with a reduced size compared to a restrictive portion of a conventional discharge port, resulting in an enlarged opening of the discharge port compared to a conventional discharge port. The improved discharge port can help discharge the compressed working fluid more quickly than a conventional discharge port, reducing and/or avoiding over-compression of the working fluid. The efficiency gained due to the enlargement of the opening may be more than the efficiency loss due to leakage of working fluid back to the suction side, resulting in a net efficiency gain of the compressor.

Abstract: Air compressor systems, upgrade kits, computer readable medium, and methods for controlling an air compressor for improved performance. The methods may include receiving a working air requirement; determining an estimated air pressure of the air compressor to deliver the working air requirement; measuring a pressure of the air compressor; comparing the measured pressure with the calculated estimated air pressure; if the measured pressure of the air compressor is greater than the determined estimated air pressure by a predetermined greater amount, then decreasing an output control of the air compressor; and if the measured pressure of the air compressor is less than the calculated estimated air pressure by a predetermined lesser amount then increasing the output control of the air compressor. The air compressor may be controlled based on a measured pressure of delivered working air. An oil control system may shut off oil to parts of the air compressor.

Abstract: Disclosed herein is a vane rotary compressor in which a fluid such as a refrigerant is compressed while a volume of a compression chamber is reduced during rotation of a rotor. There is provided a vane rotary compressor capable of preventing a delay of rotation operation of a vane by respectively forming oil films on both sides of a hinge portion of the vane in a rotation direction thereof and smoothly sliding the hinge portion.

Abstract: There is provided a vacuum pump capable of preventing foreign materials from flowing into a gap between rotors or the like and obtaining low ultimate pressure. The vacuum pump includes two rotating shafts formed extending in a first axial direction, a rotor casing, rotors, and a shielding portion. The rotor casing includes a rotor chamber disposed along the two rotating shafts, a suction port communicating with the rotor chamber, and an exhaust port communicating with the rotor chamber. The rotors are mounted on the two rotating shafts and disposed in the rotor chamber. The shielding portion is configured to prevent a gas sucked from the suction port into the rotor chamber from directly flowing into a gap between the rotors and is disposed between the suction port and inside the rotor chamber.

Abstract: A worm drive actuator for a spiral valve that opens and closes bypass ports on a rotary screw air compressor is provided.

Abstract: Systems and methods for conditioning sewage having entrained solids which clog sewage pumps, are disclosed. Systems include a sewage pump, a chopper pump, and a mixing nozzle connected to the chopper pump. Specifically, the sewage pump is a non-clog centrifugal pump having an inlet for drawing fluid into the pump and an outlet for discharging the fluid into a pipe, while the chopper pump has an inlet for drawing fluid into the pump and an outlet for discharging the fluid into the wet-well. The chopper pump may be positioned either in or adjacent to the wet-well. The mixing nozzle fluidly coupled to the chopper pump discharge, is positioned in the wet-well. Methods include the steps of positioning a chopper pump within the wet-well, drawing in liquid sewage, including the entrained solids, reducing the size of entrained solids, and discharging the sewage and reduced size solids into the wet-well.

Abstract: Embodiments of the invention are directed to a rotor for use in molten metal and devices including the rotor. The rotor has a rotor body and blades, wherein each blade includes a tip that is at least twice as hard as the rotor body.

Abstract: A submersible bottom draw pump having prefilter screen and impeller intake structure oriented at the bottom surfaces of the pump so as to minimize the required depth within which the pump operates, and having integral horizontal and vertical outlets so as to provide a submersible bottom draw pump that may be selectably configured as either a horizontal outlet bottom draw pump or a vertical outlet bottom draw pump.

Abstract: A submersible pump apparatus providing a motor assembly, a pump assembly, and a plastic pump housing. The motor assembly is either a canned motor assembly or a four inch motor assembly. The canned motor assembly is designed to prevent the immediate destruction of the submersible pump apparatus upon the occurrence of the breaching or leaking of the seals. The pump assembly is designed with either a single stage pump or multiple stage pump that utilizes a unique combination of propellers and intermediate flow straighteners, and driving mechanisms for the same. The plastic pump housing is designed to accommodate attachment of either the canned motor assembly or the four inch motor assembly to the same pump assembly.

Abstract: An electric pump having a circuit board comprises a motor housing having a rotor and a stator disposed therein, the rotor arranged on a rotation shaft and the stator disposed outside the rotor with a predetermined space therefrom; a first partition wall disposed on a first side of the motor housing and a second partition wall disposed on a second side of the motor housing, the first and second partition walls being fastened to the motor housing; an impeller disposed outside the first partition wall and fastened to an end portion of the rotation shaft; a ceramic board disposed outside the second partition wall and having a first side with a circuit formed thereon, the circuit being electrically connected to the rotor or the stator, the first side further comprising at least one electric device, and a second side facing the second partition wall with recesses arranged in the second side at predetermined distances; and an adhesive member interposed between the ceramic board and the second partition wall.

Abstract: A compressor assembly is disclosed. The compressor assembly has a compressor housing. The compressor assembly may also have a compressor impeller disposed within the compressor housing. Further, the compressor assembly may have a bearing housing. The bearing housing may have a body portion and a web. The web may extend outward from the body portion. The bearing housing may also have a bearing housing flange extending radially outward from the web. The bearing housing flange may be configured to be attached to the compressor housing. In addition, the compressor assembly may have a shim disposed between the compressor housing and the bearing housing flange.

Abstract: An in-line blower having a housing with a substantially straight airflow path. A motor and fan are positioned within the airflow path, below the handle of the blower. A battery powers the motor, and is located below the housing so that the handle, motor and fan, and the battery are vertically aligned so the weight of the blower is aligned with the handle, and reduces moment forces acting thereon.

Abstract: An inflator includes a box and a compressor unit installed in the box. The box is composed of a cover and a base, which are respectively provided with upper and lower airflow-guiding members, which can quickly guide the air current generated by a cooling fan of the compressor unit to enter the motor's housing via two openings of the housing and to flow out of the motor's housing via downstream through holes of the housing, thus dissipating the heat generated by a rotor assembly in the motor, so that heat is not easy to accumulate in the motor, so that maximum power output of the motor can be achieved, and the performance and service life of the motor can be increased.

Abstract: A turbocharger includes a turbine, a compressor, and a bearing housing forming a bearing bore. A bearing arrangement is disposed between a shaft interconnecting the turbine and compressor wheels, and the bearing housing. The bearing arrangement includes an outer bearing race element that frictionally engages the bearing bore at both ends. At a first end, a bearing retainer that is connected to the bearing housing includes a cylindrical element that extends into the bearing bore and abuts and frictionally engages a first end of the outer bearing race element. The second end of the outer bearing race element abuts and frictionally engages a stop formed at an end of the bearing bore such that no pins or other structures are required for preventing rotation of the outer bearing race element in the bearing bore.

Abstract: A centrifugal blowing fan comprises a back yoke made from metal, having a substantially bottomed cylindrical portion around a rotating shaft of a motor, an inner surface attached with a magnet of the motor mounted thereon and a flange portion disposed around a periphery of an opening of the cylindrical portion; and a cylindrical impeller made from resin, having a plurality of blades circumferentially arranged, an annular collar portion joined with first ends of the plurality of blades and a doughnut-shaped disk portion joined with second ends of the plurality of blades, wherein the disk portion has at least one fitting, and the flange portion has at least one fitted space receiving the at least one fitting so as to concentrically and fixedly connect the impeller 16 and the back yoke.

Abstract: A fan assembly includes a fan and a control module. The fan includes an adjustable fan speed. The fan generates a rate of air flow in a direction to cool a power supply unit of an electronic system based on the adjustable fan speed. The control module includes a comparator having a plurality of comparator inputs and a comparator output. The control module communicates with the fan to adjust the adjustable fan speed based on a value provided by the comparator output.

Abstract: An expander-integrated compressor is provided and includes: a motor; a compressor connected to an output shaft of the motor; an expander connected to the output shaft of the motor; a non-contact bearing disposed between the compressor and the expander; a casing; and an extraction line being in communicated with a region between the compressor and the expander in the internal space of the casing and extracts, from the region, the leakage fluid from the compressor side toward the expander side in the casing and to send the leakage fluid to a fluid line connected to the intake side or the discharge side of the compressor outside the casing. The casing seals the region from outside of the casing, thus the flow of the at least a part of the leakage fluid through the extraction line is the only flow of fluid between the region and the outside of the casing.

Abstract: A rotor assembly having a first component and a second component. The second component is secured within a bore of the first component by a first adhesive and a second adhesive. The first adhesive forms an annular seal between the first component and the second component, and the second adhesive extends from the first adhesive and has a lower viscosity than that of the first adhesive.

Abstract: A fan for a gas turbine engine is disclosed. The fan includes a fan disk and a plurality of fan blades coupled to the fan disk. The fan disk is adapted for rotation about a central axis. The fan blades are coupled to the fan disk for rotation therewith about the central axis.