Abstract: Wind energy device is composed of an enlarged main shroud structure with flare feature to capture more on-coming wind energy, and with wind flow swirling vane feature to force the captured wind flow to rotate. A multiple stage coaxial counter rotating fan system with duct feature is attached to the main shroud to boost the wind flow energy captured by the main shroud to increase the air power passing through the fan system. The coaxial counter rotating fan's rotating direction is opposite to the captured wind flow rotating one forced by the wind flow swirling vanes for higher fan efficiency. A multiple blade supply windmill with shroud feature is mounted to the coaxial counter rotating fan system to capture and convert on-coming wind energy and supply the power to drive the coaxial counter rotating fan system to achieve inputting more energy into the wind flow captured by the main shroud through the fan system.

Abstract: A first motor rotates, in one of two rotating directions, the first impeller including a plurality of front blades in a suction opening portion of a housing. The second motor rotates, in the other rotating direction opposite to the one rotating direction, the second impeller including a plurality of rear blades in a discharge opening portion of the housing. A plurality of stationary blades are arranged between the first impeller and the second impeller in the housing. When the number of the front blades is N, that of the stationary blades is M, and that of the rear blades is P, their relationship is defined as N>P>M. A length L1 of the front blades measured in an axial direction is set longer than a length L2 of the rear blades measured in the axial direction.

Abstract: A counter-rotating axial-flow fan is provided that is capable of increasing effect of cooling a stator. One or more through-holes 83 penetrating support frame bodies (21, 75) in the axial direction are formed in support frame bodies 21 and 75. One or more vent holes 57a for introducing air, sucked from a suction port 19, into a cup-like member 51 are formed in a bottom wall portion 57 of a cup-like member 51 of a first impeller 9. One or more vent holes 111a for discharging air, introduced into an internal space of a second motor 61, to the outside are formed in a bottom wall portion 111 of a cup-like member 105 of a second impeller 63.

Abstract: A method of emergency operation of an aircraft turbofan engine during an aircraft flight is provided. The engine includes a fan shaft with a fan, and an electric motor/generator mounted for rotation therewith. The method includes shutting down the engine while allowing the engine to windmill, operating the electric motor/generator to rotate the shaft at a determined windmilling speed which is desired for the fan shaft, and operating the engine at the desired windmilling speed for substantially a remainder of the aircraft flight.

Abstract: In a contra rotating propeller engine propeller blade assemblies are provided which rotate in opposite directions as a result of association with an epicyclic gear assembly acting as a differential gearbox. A carrier is provided to drive one propeller blade assembly. Actuators are provided to cause pitch angle adjustment of the respective propeller blades of the assemblies. These actuators, are secured upon a stationary structure and act through actuator rods and appropriate mechanisms to cause such angular pitch adjustment. Rotational de-couplers are provided to rotationally isolate the actuators while an actuator rod part acts across the assemblies and a rotational de-coupler to de-couple contra rotation between the assemblies while still allowing axial displacement for adjustment of the other propeller blade assembly.

Abstract: A two-shaft gas turbine includes a high-pressure turbine having an annular gas-passage outlet, a low-pressure turbine having an annular gas-passage inlet, an annular intermediate duct that connects the gas-passage outlet to the gas-passage inlet, a bearing that supports a rotor of the high-pressure turbine and that is attached to a bearing case, and a plurality of struts that support the bearing case. The struts are arranged radially along the circumference of the bearing case so as to extend though the intermediate duct in a space between an outer peripheral surface of the bearing case and an inner peripheral surface of a casing wall that surrounds the intermediate duct. The intermediate duct has strut covers through which the struts extend and which function as first-stage stator blades for the low-pressure turbine.

Abstract: A microturbine system is disclosed. The system may be provided with a first and a second blade wheel, at least one nozzle for spouting a pressure medium onto the first blade wheel for driving this wheel, wherein the first blade wheel is configured for transferring pressure medium received from the nozzle to the second blade wheel for driving the second blade wheel, the arrangement being such that the first and second blade wheel are rotatable in opposite directions under the influence of the pressure medium, and a first and second electricity generator, respectively, coupled to the first and second blade wheel, respectively. In addition, the invention relates to a method for generating electricity.

Abstract: This is related to a fan including a casing, a first impeller structure, a second impeller structure, and at least one driving device. The casing has an outlet and an air-containing portion having an entrance and an exit provided inside the casing. The first impeller structure and the second impeller structure are installed inside the casing, and include a first blade set and a second blade set, respectively. The first blade set is located corresponding to the entrance of the air-containing portion. The second blade set is located corresponding to the exit of the air-containing portion. The driving device drives the first and second impeller structures.

Abstract: A counter rotating axial flow fan that reduces vibration generation over a wide rotational speed range. A disk-shaped cushioning member is disposed between a circular plate portion of a first support frame main body half portion and a circular plate portion of a second support frame main body half portion. The cushioning member is compressed, with hook portions forming a plurality of engaging portions and hole portions forming a plurality of engaged portions completely engaged with each other.

Abstract: The wind generating device employs modules each having two turbines. Each of the turbines employs two rotors, coaxially aligned and arranged one downstream from the other. The arrangement includes a proximal channel with a leading portion having decreasing radius toward the first rotor which acts as a collector and a following portion connecting fluidly the first and second rotor and a distal channel which is separate from the proximal channel and opens into the following portion thereby adding to the airflow to the second rotor. Downstream from the second rotor is a diffuser with radius increasing with distance from the rotor. The device includes mounting modules vertically stacked which allows for yaw responsive to wind. The device further includes mounting the modules on a tower.

Abstract: A device for driving auxiliary machines of a double-shaft turbine engine with an LP shaft and an HP shaft is disclosed. The machines are installed in an accessory gearbox which includes a common drive shaft. The device includes a differential gear with a first input shaft and a second input shaft and an output shaft. The first shaft being connected via a selective coupling either to the LP shaft or to the HP shaft, the second input shaft is connected to the HP shaft, and the output shaft being connected to the drive shaft of the gearbox.

Abstract: Turbomachine, comprising two external coaxial and contra-rotating unducted propellers (122, 124), at least some of the blades (148) of the upstream propeller comprising substantially radial internal shafts for air circulation (150) communicating with air tapping orifices (152) in the boundary limits of the blades, and at their radially external ends with air outlet orifices (158).

Abstract: Blower made up of at least two axially stacked, interlocking fans. Each fan is enclosed in a housing the axially opposite ends of which are flanged. Opposing flats on immediately neighboring flanges are formed with complementary twist-locking features. The twist-locking features are configured in such a way that when the fans are stacked, the opposing flats will not be in contact with each other unless the housings are twisted out of axial alignment to bring the opposing flats flush together, and such that with the opposing flats flush in contact, twisting the housings back into axial alignment locks them together.

Abstract: A ducted fan assembly includes a housing unit, a motor, and a propeller. The housing unit includes a duct member, and a hollow seat member disposed in the duct member. The motor is mounted to an exterior of the seat member, and includes a power cord extending through the seat member. The propeller is mounted to the motor and is driven thereby to generate an airflow that flows through the duct member and that acts on the motor.

Abstract: A rotor shaft that drives a load and is supported by a plurality of bearings includes a first bearing to support a distal end of the shaft, a second bearing to support a distal end of the load, and a third bearing to support both proximal ends of the shaft and the load in order to dynamically uncouple the load from the rotor shaft and to eliminate a fourth bearing of the prior art. The invention is also used in a small gas turbine engine in which the turbine shaft is connected to an electric generator, and the third or middle bearing supports the proximal ends of the generator and the rotor shaft to dynamically uncouple the turbine shaft from the generator rotor.

Abstract: An serial axial fan unit includes a first axial fan arranged to rotate about a central axis, a flow control device connected to the first axial fan along the central axis, and a second axial fan connected to the flow control device along the central axis. The flow control device preferably includes a wind tunnel portion, a base portion, and a plurality of flow control vanes. A flow of air caused by rotation of first blades has a whirl velocity component in substantially the same direction as the rotation direction thereof. This whirl velocity component is converted to a velocity component in a direction parallel or substantially parallel to the central axis by interference of first stationary vanes. The above arrangement provides an improvement in air volume characteristics of a serial axial fan unit including two axial fans arranged in series.

Abstract: A fan frame includes a first housing having a first end portion in which a first protrusion is arranged, a second housing having a second end portion in which a second protrusion opposing the first protrusion along a specified axis is arranged, the second end portion being in an axially opposing relationship with the first end portion, and a fixing member attached to the first protrusion and the second protrusion to fix the first housing and the second housing together. Further, a first locking portion is arranged in the first end portion and a second locking portion engaging with the first locking portion is arranged in the second end portion.

Abstract: A low pressure turbine for a gas turbine engine includes inner and outer counter-rotating rotor sets, with both said rotor sets driving a common shaft.

Abstract: A turbo pneumatic cylinder of a pneumatic tool, including a front turbine, a one-way rotatable inverse turbine and a rear turbine. The front and rear turbines are mounted on the rotary shaft of the pneumatic cylinder. The inverse turbine is one-way rotatably fitted on the rotary shaft between the front and rear turbines. Multiple blades are arranged on the circumferences of the front and rear turbine and the inverse turbines. The blades of the inverse turbine are directed in a direction reverse to the direction of the blades of the front and rear turbines. The front and rear turbines and the rotary shaft rotate in the same direction, while the inverse turbine rotates in a direction reverse to the direction of the front and rear turbines. As a result, the efficiency of the pneumatic cylinder is enhanced and the twisting of the pneumatic cylinder is avoided when it is in operation.

Abstract: An axial flow fan unit includes an intake side axial flow fan, an exhaust side axial flow fan, and at least one intermediate axial flow fan. Each of the axial flow fans includes an impeller having blades rotatable about a central rotation axis, a motor arranged to rotate the intake side impeller, and a housing having an inner circumferential surface that surrounds the impeller. The rotational direction of the impeller in the intermediate axial flow fan is different from that of the impellers adjacent thereto.

Abstract: A gas turbine engine includes a gear system driven by a first and second counter rotating low pressure shaft and a fan driven by the gear system.

Abstract: Gas turbine engine systems involving tip fans are provided. In this regard, a representative gas turbine engine system includes: a multi-stage fan having a first rotatable set of blades and a second counter-rotatable set of blades, the first rotatable set of blades defining an inner fan and a tip fan; and an epicyclic differential gear assembly operative to receive a torque input and differentially apply the torque input to the first set of blades and the second set of blades.

Abstract: An engine for powering a vehicle, such as a military aircraft or a commercial aircraft, is provided. The engine broadly comprises a main core with a plurality of spools with each spool having a plurality of compressor blades and a plurality of turbine blades attached thereto. One of the spools has a first set of fan blades attached thereto. The engine further has a variable bypass turbine fan formed by a second set of fan blades. The second set of fan blades is arranged outboard of the main core. The second set of fan blades may be decoupled from the first set of fan blades.

Abstract: A fluid dynamic device including a shroud disposed about a central axis and having an upstream fluid intake region and a downstream fluid exit region, the shroud directing fluid flow between the upstream fluid intake region and the downstream fluid exit region. The shroud is configured so that, at least during some operating conditions of the fluid dynamic device, at least a portion of fluid exiting the fluid exit region is directed towards the central axis.

Abstract: A liquid turbine device including a turbine wheel, in which the turbine wheel includes more than one set of blades in radial succession.

Abstract: A first motor 25 rotates, in one of two rotating directions, the first impeller 7 including a plurality of front blades 28 in a suction opening portion 15 of a housing 59. The second motor 49 rotates, in the other rotating direction opposite to the one rotating direction, the second impeller 35 including a plurality of rear blades 51 in a discharge opening portion 57 of the housing 59. A plurality of stationary blades 61 are arranged between the first impeller 7 and the second impeller 35 in the housing 59. When the number of the front blades 28 is N, that of the stationary blades 61 is M, and that of the rear blades 51 is P, their relationship is defined as N>P>M. A length L1 of the front blades 28 measured in an axial direction is set longer than a length L2 of the rear blades 51 measured in the axial direction.

Abstract: A fan apparatus includes a casing and a fan unit. The casing is a hollow member having an inlet and an outlet. The fan unit has an inlet and an outlet, and includes a plurality of axial fans. The fan unit is disposed on the inside of the casing, and the inlet of the fan unit is disposed in the vicinity of the inlet of the casing. The position of the fan unit within the casing can be varied in order to alter the air flow and static pressure of the air discharged by the fan apparatus.

Abstract: A propulsion or pumping device which includes two counter-rotating shafts (3, 4) each carrying at least one impeller (7, 8), wherein each impeller (7, 8) can deflect by a predetermined amount in directions substantially perpendicular t to the longitudinal axis of the shaft (3, 4) on which the impeller (7, 8) is mounted.

Abstract: A turbojet has a low-pressure compressor and two fans at the front of an intermediate casing which fans are driven by two independent shafts. The compressor is disposed under the rear fan and has a downstream ring of rotor blades connecting the rear fan to the drive shaft of the rear fan, an upstream rotor blade ring that is connected to the drive shaft of the front fan and at least one ring of stator blades that is disposed between the rings of rotor blades and inside an outer stator that is supported by a second intermediate casing. Bearings are interposed respectively between the two intermediate casings and the two shafts.

Abstract: The drive device is provided for inclusion in a windmill with two counter-rotating screws. The shafts of the screws are each connected to a spindle of an epicyclical gearbox, the third spindle providing the energy for the user. The device further comprises a brake device simultaneously acting on the two shafts of the screws. In particular, said device permits the installation of a second screw on a windmill mast designed for a single screw on a windmill mast designed for a single screw, thus greatly increasing the power supplied.

Abstract: A connection structure is applied to a serial fan assembly, which includes an upstream fan and a downstream fan. The upstream fan and the downstream fan have different sizes. The connection structure connects the upstream fan and the downstream fan so that the upstream fan and the downstream fan are arranged in series. The connection structure has a housing, a base and a plurality of ribs for connecting the base, and the housing is formed with an air guiding passage and a chamber. The upstream fan or the downstream fan is accommodated in the chamber or the air guiding passage is located between the upstream fan and the downstream fan.

Abstract: An axial fan unit includes two or more impellers which rotate about a center axis in opposite directions relative to each other to create an axial airflow. Each impeller includes a hub and a plurality of blades disposed around the hub. The impellers are surrounded by a housing in a radial direction that is perpendicular or substantially perpendicular to the center axis. On a cross-sectional plane of the axial fan unit including the center axis, a distance between the hubs of the impellers and the housing decreases from an upstream side to a downstream side in a direction of the axial airflow.

Abstract: An axial fan unit includes two or more impellers accommodated in a housing. Each impeller has a plurality of blades disposed about a center axis and is rotated by an associated motor. The rotation of the impellers creates a flow of air generally flowing along the center axis. A plurality of ribs are disposed between the impellers and connected to the housing. The ribs support an associated motor. At least one of an air-inlet side edge and an air-outlet side edge of each rib is inclined with respect to a direction that is perpendicular or substantially perpendicular to the center axis, such that it gets closer to one of an air-inlet side end and an air-outlet side end of the axial fan unit as it moves away from the center axis.

Abstract: The present invention relates to a shock-absorbent structure of serially-connected fans. The serially-connected fans at least include two fan frames. A shock-absorbent element is disposed between the bonded surfaces of the fan frames and is made of a flexible material being shock-absorbent and damping. Therefore, when the fan rotor inside the fan frame rotates, the fundamental frequencies of two fan rotors are damped, and absorbed by the shock-absorbent element, thereby preventing the interaction of the fundamental frequencies from generating severe resonant effect and noise out of vibration and maintaining the optimized efficacy and the life span of the system.

Abstract: First and second axial fans are coaxially connected to each other. Each axial fan includes an impeller rotatable about a center axis; a motor rotating the impeller about the center axis, a housing member surrounding the impeller and having a hollow body and approximately square flanges at axial ends of the body, and a group of wires electrically connected to the motor. The axial fans are joined together with their flanges coincident with each other as seen along the center axis. The housing member is provided with first and second receiving portions at least one flange on a center-axis side of an outer periphery of the flange. The groups of wires of the axial fans are pulled out therefrom and extend axially toward a side of the first axial fan opposite to the second axial fan, with passing through the first and second receiving portions, respectively.

Abstract: A method for assembling a gas turbine engine includes providing a high pressure turbine, providing a low-pressure turbine inner rotor that includes a first plurality of turbine blade rows configured to rotate in a first direction, providing a low-pressure turbine outer rotor that includes a second plurality of turbine blade rows configured to rotate in a second direction that is opposite the first direction, and coupling a plurality of bearings between the outer rotor and a turbine mid-frame between the high pressure turbine and at least one of the inner and outer rotors such that the plurality of bearings support a forward end of the outer rotor.

Abstract: A compressor or pump employs principles of unsteady delayed stall to enhance the head increase produced by the compressor or pump. Plural airfoil-shaped lifting elements are spaced from each other in a cascade and the fluid is directed into the cascade by a device that varies a parameter of the flow relative to each lifting element in repeating cycles to cause the flow relative to each lifting element to begin to separate from the lifting element and then reattach thereto during each cycle. The cascade can comprise an axial flow impeller with plural impeller blades arranged around a hub capable of rotating on an axis. The device for varying the flow parameter can be a stator with a plurality of stator blades upstream of the impeller, or a second, counter-rotating axial flow impeller. In either case, the parameter is a flow angle at which the flow is directed to the downstream impeller.

Abstract: A method for assembling a gas turbine engine that includes providing a low-pressure turbine inner rotor configured to rotate in a first direction, providing a low-pressure turbine outer rotor configured to rotate in a second direction that is opposite the first rotational direction, and coupling at least one foil bearing to at least one of the inner and outer rotors to facilitate improving clearance control between a first rotating component and at least one of a second rotating component and a non-rotating component.

Abstract: Methods and apparatus for assembling a gas turbine engine are provided. The method includes coupling a first turbine shaft that includes m rows of turbine blades within the gas turbine such that the first turbine shaft is rotatable in a first direction, and coupling a second turbine shaft that includes n rows of turbine blades within the gas turbine such that the second turbine shaft is rotatable in a second direction wherein a torque split between the first and second turbine shafts is substantially proportional to the number of rows of turbine blades on each shaft relative to a total number of rows of blades on both shafts, and wherein m and n are selected to provide a torque split between the first turbine shaft and second turbine shaft of greater than about 1.2:1.

Abstract: A turbojet includes a differential gear with a first planetary pinion driven by the shaft of the high pressure spool and a second planetary pinion driven by the shaft of the low pressure spool. The planetary pinions drive satellite pinions mounted in a cage by which the ancillary machines are driven. The satellite pinions and said cage are co-rotary and the mechanical transmission ratio R1 between the high pressure shaft and the first planetary pinion of the differential gear and the transmission ratio R2 between the low pressure shaft and the second planetary pinion of the differential gear are such that the power extraction distribution between the high pressure spool and the low pressure spool at idle speed is between 80%/20% and 20%/80%. The operation of the high pressure compressor is not affected by the maximum power drawn by the ancillary machines.

Abstract: An axial-flow fan with double impellers is provided that can produce a larger amount of air and a higher static pressure than can be achieved with conventional fans. The axial-flow fan with double impellers has a first axial-flow fan unit and a second axial-flow fan unit. The first axial-flow fan unit includes a first case, a first impeller and a plurality of webs that fix a first motor to the first case. The second axial-flow fan unit includes a second case, a second impeller and a plurality of webs that fix a second motor to the second case. The first case and the second case are coupled together to form a housing. The webs of the first axial-flow fan unit and the webs of the second axial-flow fan unit are combined together to form a plurality of stationary webs arranged in the housing. The number of front blades provided at the first impeller is set to five, the number of stationary blades is set to three, and the number of rear blades provided at the second impeller is set to four.

Abstract: A structure for cooling an electronic component includes a heat sink attached to the component, an inner air duct extending into a central portion of the heat sink, and an outer air duct extending into an outer portion of the heat sink. In inner fan, within the inner air duct, moves air in one direction, while an outer fan, in the outer air duct, moves air in the other direction. The fans may be built as separate rotors, or as separate portions of a single rotor.

Abstract: A wind power installation comprising at least two rotors which are arranged one behind the other and of which the first rotor which is arranged in front of the second rotor is of a smaller diameter than the second rotor.

Abstract: A heat-dissipating module includes a first fan unit and a second fan unit, which are serially connected together to provide an air inlet and an air outlet. Each of the first fan unit and the second fan unit includes a casing and an impeller. At least one side air inlet is defined in at least one of a plurality of sides of the casing of the first fan unit and a plurality of sides of the casing of the second fan unit. The air inlet amount and the air outlet amount of the second fan unit are increased by the side air inlet. The air density distribution is uniform, and the wind noise during operation is lowered.

Abstract: An ultra-high speed vacuum pump evacuation system includes a first stage ultra-high speed turbofan and a second stage conventional turbomolecular pump. The turbofan is either connected in series to a chamber to be evacuated, or is optionally disposed entirely within the chamber. The turbofan employs large diameter rotor blades operating at high linear blade velocity to impart an ultra-high pumping speed to a fluid. The second stage turbomolecular pump is fluidly connected downstream from the first stage turbofan. In operation, the first stage turbofan operates in a pre-existing vacuum, with the fluid asserting only small axial forces upon the rotor blades. The turbofan imparts a velocity to fluid particles towards an outlet at a high volume rate, but moderate compression ratio. The second stage conventional turbomolecular pump then compresses the fluid to pressures for evacuation by a roughing pump.

Abstract: A wind power system is provided including at least one generator fan having a front face and a rear face. The system also includes a first wind capturing device positioned proximate to the front face. The wind capturing device can be configured to capture wind to create a first pressure proximate to the front face that is greater than a second pressure proximate to the rear face. The pressure difference causes the captured wind to flow across the at least one generator fan from the front face to the rear face.

Abstract: A heat-dissipating module including a first fan unit, a second fan unit, and a connecting arrangement for connecting the first fan unit and the second fan unit in a serial manner. The first fan unit is located on an air inlet side and includes a casing and a fan wheel received in the casing of the first fan unit. The second fan unit is located on an air outlet side and includes a casing and a fan wheel received in the casing of the second fan unit. At least one side air inlet is defined between the casing of the first fan unit and the casing of the second fan unit for increasing an air inlet amount and an air outlet amount of the second fan unit.

Abstract: A composite fan consists of a first fan and a second fan located on the air outlet side of the first fan. The first fan has a plurality of first rotary vanes and a plurality of first guide vanes located on the air outlet side of the first rotary vanes. The second fan has a plurality of second rotary vanes and a plurality of second guide vanes located on the air inlet side of the second rotary vanes. Each of the second guide vanes corresponds to and is coupled with each of the first guide vanes to form a continuous curved surface.

Abstract: A blower having a plurality of impellers is described. The blower has two driving devices and two impellers respectively mounted on the two driving devices. The blades of the two impellers, which are radially or axially disposed, are overlapped so as to enhance the heat-dissipating efficiency of the blower.

Abstract: A redundant fan system for a computer includes two fans installed in series with at least one of the fans having collapsible blades. A fan system of this type reduces the fan inefficiency caused when one fan in a series mounted pair is not operating, either because it is free-wheeling or in a locked rotor condition. When non-operational, the fan blades of the collapsible fan fold inward due to airflow generated by the operational fan over the collapsible blades. The ability of the blades to fold reduces the inefficiency of the operational fan, having less of an effect on fan life. Also, because the flow of air is less restricted, proper airflow can be maintained, thus preventing overheating of the computer.