Abstract: An adjustable blade of an impeller built-in electric pump includes a blade body, where the blade body realizes an angle adjustment through a lever regulator structure. The lever regulator structure includes a control shaft arranged at a root of the blade body, the other end of the control shaft is connected to a crank, the other end of the crank is rotatably connected to one end of a connecting rod, the other end of the connecting rod is rotatably connected to an operating frame, and the operating frame is provided with a drive rod configured to drive the operating frame to move. The adjustable blade of the impeller built-in electric pump has the advantages of being compact and simple, low manufacturing cost and low difficulty of installation and maintenance. Moreover, by adjusting the angle of the blade, the vibration during the start-up of the unit can be effectively reduced.

Abstract: A blower may include an operation rod extending in a front-rear direction, a rear housing disposed on a rear portion of the operation rod and housing a prime mover, and an attachment detachably attached to a front portion of the operation rod. The attachment may include an air passage pipe housing a fan driven by the prime mover; an intake pipe disposed on a rear portion of the air passage pipe, and a nozzle disposed on a front portion of the air passage pipe. A sound absorbing material may be disposed on an inner surface of the intake pipe.

Abstract: A wind turbine (10) includes a tower (12), a nacelle (14) coupled to the tower (12) and housing one or more heat generating components (18, 20), a rotor (16) having a least one wind turbine blade (24), and a cooler (38) mounted to the nacelle (14) and configured to cool the one or more heat generating components (18, 20) in the nacelle (14) by circulating a working fluid. The cooler (38) includes a support frame (46) coupled to the nacelle (14) and a heat exchanger (48) coupled to the support frame (46) and configured to cool the working fluid. The heat exchanger (48) includes at least two cooling panels (58) in non-planar relation with each other. The at least two cooling panels (50) may also be pivotably coupled to each other. A method of assembling a cooler (38) is also disclosed.

Abstract: A system for tracking a user. In some embodiments, the system includes a user-tracking circuit, configured to determine a direction to the user, and a pointing control circuit, for causing a payload to be aimed based on the direction to the user.

Abstract: A method is provided involving a turbine engine. During this method, data is received indicative of twist of a shaft of the turbine engine. The data is monitored over time to identity one or more reversal events while the turbine engine is operating, where each of the reversal events corresponds to a reversal in a value sign of the data. Shaft shear is identified in the shaft based on occurrence of N number of the reversal events.

Abstract: The present disclosure describes modular fan unit systems and assemblies. A modular fan unit system assembly may include a mounting structure; and a modular fan unit system.

Abstract: A wind turbine and wave/tidal energy apparatus has a vertical axis blade assembly, a lower cylindrical tube and an upper cylindrical tube. A rotor shaft is connected to the blade assembly and the upper cylindrical tube. A magnetic chamber is housed inside an upper cylindrical frame and is connected with the blade assembly through the rotor shaft. The frictionless levitation chamber is housed inside the upper cylindrical frame. The rotor shaft may protrude through the magnetic chamber into the frictionless levitation chamber and may have a magnet attached on the end of the rotor shaft. The magnetic array chamber is housed inside the lower cylindrical frame and may have a magnetic array axle with plurality of fixed magnets on it. The magnetic array axle may protrude into the frictionless levitation chamber and have a magnet attached to it. The floating inductive coil is located externally of the lower cylindrical frame.

Abstract: The present invention, a multi-axial variable height wind turbine, includes a wind turbine, a structural support, a tilting boom extending between said structural support and said wind turbine, a multiaxial drive mechanism extending upwardly from said structural support for receiving said tilting boom where the multiaxial drive mechanism operationally connects the tilting boom to the structural support for rotation along a plurality of axes. The tilting boom includes a counterweight system positioned opposite said wind turbine which includes a moveable mass which is moved along the tilting boom by a drive mechanism for movement of the wind turbine between a raised position and a lowered position. The wind turbine also includes a plurality of pitched blade members extending between an inner hub and an outer ring.

Abstract: Disclosed are pumps designed to make priming more efficient and therefore reduce priming time. The disclosed pumps include one or more deflection structures that prevent fluid moving through a diffuser of the pump from continuing in a circular path and instead divert the fluid in a different direction that leads directly to an outlet of the pump. This deflection reduces air bubble accumulation inside the pump while priming and makes it easier for air to escape through the pump outlet. Making it easier for air to escape the pump outlet ultimately allows air to escape the pump faster during priming, reducing back pressure caused by trapped air pockets inside the pump and improving priming performance.

Abstract: A sealing system includes: a double mechanical seal having a pump-side sealing mechanism (10, 12) and an atmospheric-side sealing mechanism (11, 13); a pump mechanism (19) driven by a rotational shaft (1); a first medium circulation line (30) for circulating a fluid barrier-and-cooling medium between a first chamber (22a) and a second chamber (22b), the first medium circulation line (30) being coupled to the first chamber (22a) and the second chamber (22b), the fluid barrier-and-cooling medium being different from a fluid handled by the centrifugal pump; a heat exchanger (21) and a shut-off valve (28) attached to the first medium circulation line (30); a second medium circulation line (31) bypassing the shut-off valve (28); and a medium pressurizing pump (45) and an on-off valve (23) attached to the second medium circulation line (31).

Abstract: A boundary layer turbomachine can include a housing (10) defining an interior space and having an inlet opening and an outlet opening to facilitate movement of a fluid through the housing (10). The boundary layer turbomachine can also include a rotor assembly (20) disposed in the rotor chamber and configured to rotate about an axis of rotation (1). The rotor assembly (20) can have a plurality of disks (21) spaced apart along the axis of rotation (1) to provide gaps (54) between the disks (21). The plurality of disks (21) can also define an interior opening (26) along the axis of rotation (1). The rotor assembly (20) can have a disk carrier (46) disposed at least partially in the interior opening (26) in support of the plurality of disks (21). The disk carrier (46) can have a fluid passageway (47) exposed to two or more of the gaps (54) between the disks (21). The fluid can pass through gaps (54) between the disks (21) and the interior opening (26) as the fluid moves through the housing (10).

Abstract: A wind turbine is provided. The turbine includes a support having an axis of rotation, a generator, a plurality of blades rotatably mounted on the support about the axis of rotation, the blades being moveable between a retracted position generally parallel with the axis of rotation and a fully deployed position generally perpendicular with the axis of rotation, the blades being connected to the generator such that rotation of the blades in a direction induced by wind causes the generator to produce electricity, and the provision of electricity to the generator rotates the blades, and a controller connected to the generator and configured to deliver a flow of current to the generator that is sufficient to move the blades from the retracted position toward the fully deployed position and insufficient to move the blades all the way to the fully deployed position.

Abstract: A vacuum pump includes a plurality of exhaust stages provided between an inlet port and an exhaust port so as to function as means for exhausting gas molecules, and a number of blades provided between the inlet port and an uppermost exhaust stage of the plurality of exhaust stages so as to rotate together with a rotary blade that constitutes the uppermost exhaust stage as a particle transport stage for transporting particles in an exhaust direction of the gas molecules, the number being smaller than the number of rotary blades that constitutes the uppermost exhaust stage.

Abstract: A turbine shaft of a turbomachine extending along a longitudinal axis (A) includes a main tubular portion with a length L1 and a maximum outer main diameter. The shaft further includes a secondary tubular segment with a length L2 and a maximum outer secondary diameter greater than the maximum outer main diameter. The secondary tubular segment extends radially from the shaft such that the main tubular portion extends on either side of the secondary tubular segment along the longitudinal axis (A). The secondary tubular segment includes a weak point that is configured to break the shaft into two distinct parts when the value of a tangential stress applied to the shaft exceeds a predetermined threshold value, and thus cause retraction of the turbine.

Abstract: A sump pump system enables automatic determination and utilization of frequencies for mechanical shakers for sump pumps. These techniques may be implemented to detect a fault (e.g., a stuck impeller) with a sump pump and to identify a desirable frequency at which a mechanical shaker for the sump pump should vibrate to correct the fault.

Abstract: A wind turbine drive control device according to one aspect of the present invention is a wind turbine drive control device for controlling at least one drive device for moving two structures included in a wind power generation device relative to each other, the wind turbine drive control device including: an obtaining unit for obtaining information related to a load occurring between the at least one drive device and one of the two structures that receives a force generated by the at least one drive device; and a control unit for controlling the at least one drive device so as to cause a force generated by the at least one drive device to be reduced or zero based on the information related to the load obtained by the obtaining unit during a stop period in which the two structures are stopped relative to each other.

Abstract: A nacelle for a wind turbine, the nacelle comprising: a drivetrain with a drivetrain axis, at least two torque arms positioned around the drivetrain axis and attached to a member of the drivetrain, and a frame attached to a yaw bearing. The torque arms of the drive train are supported by the frame and at least one of the torque arms has an orientation deviating at least substantially from being horizontal.

Abstract: A maintenance system for a turbine engine includes a pump and a crank device operatively coupled to the pump. The pump includes a pump housing and a pump drive that is configured to operatively couple to the turbine engine. The crank device is operatively coupled to the pump and includes a crank drive that is configured to enable movement of the pump drive and thereby movement of the turbine engine during non-operational periods, such as during a maintenance or inspection period.

Abstract: A hanger for a turbine engine can include a first surface confronting a cooling airflow, a second surface facing a heated airflow, and a third surface radially outward of the first surface. The hanger can also include a cyclonic separator with a dirty air inlet and a clean air outlet, as well as a cooling air circuit extending through the cyclonic separator.

Abstract: A valve drive device includes a hydraulic cylinder that is configured to drive a regulating valve, an actuator that is configured to supply hydraulic oil to the hydraulic cylinder, and a connection pipe through which the hydraulic cylinder with the actuator communicate with each other and the hydraulic oil flows. The hydraulic cylinder includes a cylinder body to which the hydraulic oil is supplied, a piston movable in a central axis direction of the cylinder body by the hydraulic oil supplied to the cylinder body, and a cylinder base on which the cylinder body is placed in a state where the central axis direction is coincident with a vertical direction. The cylinder base has hydraulic oil flow path portion connected to the connection pipe and through which the hydraulic oil flows.