Abstract: Embodiments of a medical or dental handpiece are disclosed. A medical or dental handpiece may include a rotatable drive element to drive a tool that can be connected to the handpiece, a rotational speed measuring device which is designed to generate a variable electric rotational speed measurement signal assigned to the rotational speed of the drive element, a lighting device that can be supplied with electric power for emitting radiation, in particular visible light, onto a treatment site, and at least one shared electric line, which is provided for transmitting electric power to the illumination device and the rotational speed measurement signal of the rotational speed measurement device. Further a corresponding method for the operation of a medical or dental handpiece is disclosed.

Abstract: Embodiments of a medical or dental handpiece are disclosed. A medical or dental handpiece may include a rotatable drive element to drive a tool that can be connected to the handpiece, a rotational speed measuring device which is designed to generate a variable electric rotational speed measurement signal assigned to the rotational speed of the drive element, a lighting device that can be supplied with electric power for emitting radiation, in particular visible light, onto a treatment site, and at least one shared electric line, which is provided for transmitting electric power to the illumination device and the rotational speed measurement signal of the rotational speed measurement device. Further a corresponding method for the operation of a medical or dental handpiece is disclosed.

Abstract: Certain embodiments of the invention may include systems, methods, and apparatus for controlling turbine guide vane positions. According to an example embodiment of the invention, a method is provided for controlling at least one turbine guide vane. The method includes receiving a reference signal associated with the at least one turbine guide vane, measuring an actuator position and an angular position associated with the at least one turbine guide vane, generating a deadband signal based at least in part on the angular position, and manipulating the at least one turbine guide vane based at least in part on the deadband signal and the reference signal.

Abstract: A system for recapturing energy from a ship moving through the water utilizes a hydraulic turbine positioned within the ship's hull. Water pushed up from the bow of the ship is fed into a water conducting tube and used to drive the turbine. The turbine may produce electricity for powering on-board systems or may be used to augment the main propulsion system, thereby reducing energy costs for ship operations.

Abstract: A power generation system includes a ram air turbine that is connected to a generator. The power generation system may be located in a pod, for example a pod for mounting on an aircraft. The ram air turbine receives air that passes through an air path through the pod, going in through an air inlet, through the turbine to turn the turbine, and out through an air outlet. The system includes a deployable flow obstruction, such as one or more airbags, that are deployable to suddenly obstruct the flow through the air path. The obstruction may be used to cut off flow (or greatly reduce flow), when overspeed of the ram air turbine is detected. The obstruction deploys (for example, airbags deploy in an air inlet of the system) to prevent continuation of the overspeed operation of the turbine, which may damage parts of the system.

Abstract: The turbocharger having a device for detecting a malfunction of the turbocharger, particularly a malfunction of at least one bearing of the turbocharger has the following features: The device for detecting a malfunction of the turbocharger has a memory device, in which the target operating states of an intact turbocharger are stored. The device for detecting a malfunction of the turbocharger further has a comparing device, in which the determined actual operating state of the turbocharger is compared to a corresponding target operating state of an intact turbocharger. The turbocharger further has a measuring device for determining an actual operating state of the turbocharger, wherein the device for detecting a malfunction of the turbocharger emits an error message if the comparing device detects that the actual operating stage deviates from the target operating state by a predefined measure.

Abstract: A method for controlling an operation of a wind turbine. A meteorological condition is received from a meteorological sensor. An operating threshold value is calculated at least in part by applying a continuous function to the meteorological condition. An operation of the wind turbine is controlled based at least in part on the calculated operating threshold value. For example, the wind turbine may be disabled if a current wind speed exceeds a maximum wind speed that is calculated based on an ambient air temperature or ambient air density.

Abstract: The present invention provides a flow control device for controlling fluid flow into a turbine, said turbine comprising: a stator comprising a plurality of vanes extending radially inwards from a casing and arranged to define therebetween a plurality of nozzles extending radially inwards from casing; a rotor located in a fluid flow direction downstream of said stator and comprising a plurality of blades extending radially from said turbine shaft, wherein said fluid is arranged to be admitted to said turbine upstream of said stator and to flow around said plurality of vanes through said plurality of nozzles for impingement upon said plurality of blades of said rotor; and flow control means arranged to control a nozzle area open for fluid flow by altering the radial length of at least one of said plurality of nozzles, said flow control means comprising: an actuating means comprising a plurality of arcuate plates located within a peripheral cavity in a housing of said turbine such that a longer curved edge of ea

Abstract: The present invention concerns a wind power installation having a rotor with at least one blade and an adjusting device for the rotor blade. An adjusting device with more than one drive for one rotor blade is provided. By virtue of that arrangement each drive only has to furnish a corresponding fraction of the power output, it can be of a correspondingly smaller design configuration, and it imposes a correspondingly lower loading on the subsequent components.

Abstract: A low drag ducted ram air turbine generator and cooling system is provided. The ducted ram air turbine generator and cooling system has reduced drag with respect to prior ram air turbine generator systems while extracting dynamic energy from the air stream during the complete range of intended flight operating regimes. A centerbody/valve tube having an aerodynamically shaped nose is slidably received in a fairing and primary structure to provide a variable inlet area. An internal nozzle control mechanism attached to the valve tube positions nozzle control doors to provide variable area nozzles directing air flow to the turbine stator and rotor blades to maintain optimum generator efficiency. An alternate embodiment includes an annular internal nozzle having interleaved panels to modulate the air flow to the turbine.

Abstract: A low drag ducted ram air turbine generator and cooling system is provided. The ducted ram air turbine generator and cooling system has reduced drag while extracting dynamic energy from the air stream during the complete range of intended flight operating regimes. A centerbody/valve tube having an aerodynamically shaped nose is slidably received in a fairing and primary structure to provide a variable inlet area. An internal nozzle control mechanism attached to the valve tube positions nozzle control doors to provide variable area nozzles directing air flow to the turbine stator and rotor blades to maintain optimum generator efficiency. An alternate embodiment includes an annular internal nozzle having interleaved panels to modulate the air flow to the turbine.

Abstract: A regulatable dental turbine includes an actuator arrangement which is provided for regulating the speed by varying the amount of an essentially constant volume stream of drive fluid striking a turbine wheel of the dental turbine. The change of the direction based on the actuator arrangement may bypass a portion of the volume hitting the blades of the dental turbine or may create a portion of the stream as a deceleration force acting on the turbine wheel. The actuator arrangement can operate in a speed-dependent fashion based on the flow deflected by the blades of the wheel on an impact surface or can act with a speed sensor determining the rate of rotation of the turbine wheel.

Abstract: A regulatable dental turbine includes an actuator arrangement which is provided for regulating the speed by varying the amount of an essentially constant volume stream of drive fluid striking a turbine wheel of the dental turbine. The change of the direction based on the actuator arrangement bypasses a portion of the volume hitting the blades of the dental turbine. The actuator arrangement operates in a speed-dependent fashion based on the flow deflected by the blades of the wheel on an impact surface.

Abstract: The turbine (1) has a control and regulating system with a pump (31), the pressure of which changes proportionally to the second power of the flow delivered by the pump or to the second power of the speed (n.sup.2) of the turbine (1). The hydraulic follow-up piston arrangement with the pilot piston (41) and the control piston (5) for regulating the speed of the turbine, is fed by this only pump (31), which permits a particularly compact and space-saving construction. The turbine can be used as a motor or drive in applications other than the generating of electricity, such as, for example, for rope winches.

Abstract: A superhigh pressure fluid injection apparatus causes a fine jet streamline flow of superhigh pressure fluid to make a circular motion by utilizing a part of the supplied high pressure fluid. The apparatus includes an eccentric rotary member (3) for eccentrically rotating a nozzle (5), and a hydraulic motor (2) for driving the rotary member (3) into rotation by utilizing a part of the supplied high pressure fluid to the nozzle (5).

Abstract: One end of an operating rod is connected to a deflector arm which causes a jet deflector of a Pelton wheel to open or close while the other end of the operating rod carries a spring bearing plate which is disposed in the bore of a cylinder which is movable in the axial direction of the operating rod. A spring is accommodated in the bore of the cylinder on the side of the operating rod. One end of the cylinder is pin connected to the midpoint between the ends of a swinging lever whose one end is pivotally supported and whose other end is connected to an electric servomotor so that upon energization of the servomotor, the swinging lever is caused to undergo a reciprocal angular motion. The deflector is forced to move to its full closure position by the release of the energy stored in the spring.

Abstract: An impulse turbine system (10) includes a rotatably mounted turbine wheel (12) and a speed sensing system (40) to sense the speed of the turbine wheel (12). A flow diversion nozzle (14) normally provides a jet of driving fluid to power the turbine wheel (12). This nozzle (14) includes an internal flow diverter (30, 38, 58, 74, 76, 88, 90, 94, 104, 110, 118) which operates under the control of the speed sensing system (40) when the turbine wheel (12) reaches an overspeed condition to angularly divert the jet of driving fluid issuing from the nozzle opening (26).