Abstract: A variable stiffness damper system including an inner spring positioned between a first wall and a second wall, in which the inner spring includes a first member and a second member each coupled together at a distal end by an inner bumper. The first member and the second member are each contoured toward one another. The first member, the second member, and the inner bumper form a cavity therebetween. An outer spring is positioned between the inner spring and the first wall or the second wall. The outer spring includes a spring arm contoured toward the inner spring. The outer spring includes an outer bumper positioned between the inner bumper and the first wall or the second wall. The inner bumper and the outer bumper are selectively couplable to one another based on a load applied to the damper system.

Abstract: This invention relates to an airfoil modifying device, a wind turbine blade and a method of modifying an airfoil profile of the wind turbine blade. The airfoil modifying device comprises a deformable element connected to a filler element, both configured to deform between a retracted position and an extended position. The airfoil modifying device is passively deformed by the local air pressure acting on the blade surface and thus the airfoil modifying device.

Abstract: An aircraft having a frame assembly that supports a compressor having an outer shell that defines front and rear nozzle ports with rotatable nozzles for selectable vertical or horizontal thrust. The inner shell and the outer shell define an intake gap therebetween such as an annulus. A first fan unit within the inner shell and is configured to exhaust air through the front nozzle ports. A second fan unit within the outer shell intakes air through the intake gap and exhausts air through the rear nozzle ports. The fan units are preferably connected to one another via a drive shaft that is surrounded by a streamlining tube. The fan units each include a plurality of fans having stators therebetween. The stators have a plurality of stator arms with a wing structure pivotally attached to the trailing edge for angling air flow from a front to a rear fan.

Abstract: The present invention relates to a wind turbine rotor blade assembly comprising a rotor blade and a noise reducer (70) configured on the rotor blade. The noise reducer (70) comprises a plurality of aligned spine members (72), each spine member having a length and comprising a first section (74) extending along a first part of the length of the spine member, and a second section (76) extending along a second part of the length of the spine member, wherein the first section (74) has a higher stiffness than the second section (76).

Abstract: It is about an omnidirectional generator apparatus, capable of translating the push of a fluid from any direction in the vertical, horizontal or diagonal plains to rotational movement on a unique axis. This rotational movement can be translated to electric energy by known means.

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 rotor blade, with a suction side and a pressure side, for a wind turbine, having a rotor blade root of a hub region for attaching the rotor blade to a rotor hub, a rotor blade tip, which is arranged on a side, facing away from the rotor blade root, of a tip region, at least one vortex generator, which is arranged between the rotor blade root and the rotor blade tip, wherein the at least one vortex generator comprises swirl elements with a length and a height, which are arranged one next to the other in a longitudinal direction of the rotor blade and are in each case oriented at an angle to a main flow direction of the rotor blade, wherein, in the longitudinal direction of the rotor blade, the swirl elements have a lateral spacing to one another. A variation in the geometry of the swirl elements is realized in a manner dependent on a respective distance between the arrangement of the swirl elements and the rotor blade root.

Abstract: A wind turbine blade including an elongate reinforcing structure, the reinforcing structure comprising a plurality of strips of fibre-reinforced polymer arranged into a stack structure, and at least one adjacent pair of the plurality of strips including an infusion promoting layer, wherein the infusion promoting layer is a fabric comprising a plurality of twisted yarns. The invention is also expressed as a method of assembling a wind turbine blade.

Abstract: A method of optimizing probe placement in a turbomachine is disclosed which includes determining wavenumber (Wn) of N dominant wavelets generated by upstream and downstream stators and blade row interactions formed around an annulus, establishing a design matrix A utilized in developing flow properties around the annulus having a dimension of m×(2N+1), iteratively modifying probe positions placed around the annulus and determining a condition number of the design matrix A for each set of probe positions until a predetermined threshold is achieved for the condition number representing optimal probe position, wherein the condition number is defined as norm A·norm A+, wherein A+ represents inverse of A for a square matrix and a Moore-Penrose pseudoinverse of A for a rectangular matrix.

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: An improved turbine over the old horizontal and vertical axis turbines because of its ability to capture several times the amount of wind. The basic design and process of this new machine can also work in the ocean at capturing ocean currents. Being Omni-directional (not having to turn into the wind) gives it one efficiency over the 3 bladed turbine. Another efficiency all embodiments have is its frictionless exponent. This quality helps save on wear and tear and maintenance cost. Most if not all past turbines have a static presents, being built in one basic wind capturing position. This new turbine is more dynamic because it can hide from wind damage and then open to capture more wind than its predecessors.

Abstract: A liquid pump comprising a motor housing, a motor, a volute housing joined to the motor housing, and upper and lower seals contained in the volute housing. The motor housing has a motor housing side wall including a distal end joined to the volute housing. The motor includes a rotatable shaft that extends into the volute housing. The volute housing includes an upper volute wall having a major portion in direct fluid communication with the motor housing volume, thereby enabling a high rate of heat transfer from the motor to the fluid in the volute that is being pumped. In that manner, the pump has dual seal capability that reduces the risk of motor damage due to a seal failure, while also having a high rate of heat transfer out of the motor housing, which reduces the risk of failure of the motor from operating at a high temperature.

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 method of controlling, by a controller for a compressor (200), pressure at plurality of magnetic motor thrust bearings (360, 370) for a motor (280) disposed within a housing (220) for the compressor (200), wherein the motor (280) and an impeller (270) are disposed on a compressor shaft (260) within the housing, the method including: monitoring current at each of the plurality of magnetic motor thrust bearings (360, 370), controlling a flow regulator (400) in a bypass loop (380) for the impeller (270) to decrease flow through the bypass loop when a first current in a first of the plurality of magnetic motor thrust bearings (360, 370) exceeds a second current in a second of the plurality of magnetic motor thrust bearings (360, 370), and controlling the flow regulator (400) to increase flow through the bypass loop (380) when the second current exceeds the first current.

Abstract: A compressor housing (12) for a turbocharger includes a recirculation cavity (4) formed in a portion of the compressor housing (12). The recirculation cavity (4) is defined by an inner cavity wall (2) and an outer cavity wall (5). In addition, an inlet groove (1) and an outlet (7) are formed in the recirculation cavity (4) for circulating airflow from the compressor housing (12) through the recirculation cavity (4), and at least one recirculation noise obstruction (6) is fixedly secured within the recirculation cavity (4) to disrupt air flow through the cavity and reduce noise in the compressor housing (12).

Abstract: A radial compressor having a specially designed iris diaphragm mechanism is described. This mechanism includes only a single (main) blade that is driven directly by an actuating element, while the other blades are driven by the respective preceding blade via the movement of the main blade. This results in a particularly simple embodiment of the iris diaphragm mechanism. A blade for an iris diaphragm mechanism of this type and a charging device having a radial compressor of this type are furthermore described.

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.