Disclosed is a generator device using potential energy, relating to the field of new technologies. The generator device using potential energy includes a ball buoy and connecting rods, the ball buoy includes a casing, flywheels, a transmission gear and generators, the flywheel, the transmission gear and the generators are located inside the casing. A generator gear is provided on a rotary shaft of each of the generators, the transmission gear is provided with external teeth and internal teeth, and the generator gear is engaged with the internal teeth, and the flywheels are engaged with the external teeth. The connecting rods are each connected with one of the flywheels inside the casing through a rotating shaft arranged on the casing, and the flywheels are driven to rotate in one direction by the connecting rods through the rotating shaft.

A rotor shaft assembly for a torque-transmitting connection of a gearbox unit to a generator unit includes an output shaft for the gearbox unit, a rotor shaft for the generator unit, and a curved tooth coupling designed to connect the output shaft and the rotor shaft to one another The curved tooth coupling includes a releasably fastened supporting element designed to axially position the curved tooth coupling and including a mating face to support an axial force of the curved tooth coupling, with the mating face being designed to slide on a corresponding support face of the output shaft or of the rotor shaft when the output shaft is tilted relative to the rotor shaft.

A fluid turbine has semi-spherical, hollow blades arrayed about a vertical axis, and a passive wildlife-deterrent system using ultraviolet coloration of the rotor blades. The turbine's blade shape reduces drag on a convex side and increases drag on a concave side. Part of the center of the array of rotor blades is open, allowing flow through the center of the array. The spherical form enhances fluid flow through the center of the array and results in rotational force on a downwind blade, and directs fresh air into bypass flow.

A passive magnetic bearing employs eddy currents in a copper core between neodymium annular magnets to support the copper core and an associated rotating shaft. The copper core has an annular flange that is coaxial with a hollow cylinder. The hollow cylinder supports a rotating shaft. An annular iron core is coaxial with and surrounds the annular flange. Annular neodymium magnets surround the upper and lower portions of the hollow cylinder. In some embodiments a touch-down bearing is made up of an upper and a lower bearing race that are spaced away from the upper surface and lower surface of the annular flange. The core rotates over the bearing race(s) until sufficient magnetic flux is generated to support the copper core and hence the shaft. Once spinning, a magnetic field is generated in the copper core.

An axial-flux generator for fluid turbines has a continuously variable generator that is constructed of a pair of rotors that move radially across a stator resulting in varying torque and varying power output. In one embodiment the rotors are normally held proximal to the center of a stator by spring tension. The stator is larger than the normally held position of the rotors. As the angular velocity of the rotors increases, the rotors move radially toward the perimeter of the stator, thus encountering a greater stator surface area providing increased torque, increased power generation and a higher-rated output speed when used with a fluid turbine.

A rotary connection for a rotor blade of a wind turbine. The rotary connection is used, for example, for adjusting a rotor blade of a wind turbine. The rotary connection according contains an outer ring and an inner ring. The inner ring has a contact surface in the direction of the rotor blade and a screw fixing surface in the direction of the rotor hub. The contact surface and the screw fixing surface are arranged parallel to each other and provided with passage holes, which each have a central axis. Rolling elements are arranged in at least two running rows located under each other between the outer ring and the inner ring, wherein the rolling elements each have a rolling element diameter. According to the invention, at least the lower running row is arranged with its rolling element centre underneath the screw fixing surface.

A noise-reduction device for a wind turbine and the wind turbine applied thereof are introduced. The noise-reduction device has a body. The body has a connection portion and a spoiler. The connection portion is concavely disposed on one side of the body and corresponds in shape to the wind turbine's blade so as to be fixed to a confronting edge of the wind turbine blade. The spoiler is disposed on the opposing side of the body. As soon as the wind turbine blade is driven by wind, the spoiler stirs air and guides the air across two sides thereof. When guided by the spoiler, airflows turn into vortexes on the wind turbine blade; hence, the chance that the wind turbine will stall and generate noise is greatly reduced.

A vertical axial wind power generator including blades rotated in a horizontal direction, and each blade includes inner and outer wind collection vanes, so that the blades can be operated without being limited by space and environment and can be rotated vertically by tiny wind. When wind power is lower than magnetic force of magnet on the blades and fastening disks, the blades enters an open status to increase windward area; when wind power is higher than the magnetic force, centrifugal force can force the blade to close to become a ball type, and blades of the ball type can have strong torsion effect, and only the windward area of the outer wind collection vane receive wind, so that rotation speed of the wind power generator can be stable. When wind power becomes weak, the blades can be rotated reversely to the open status.

Systems, apparatuses, and methods of and for an ophthalmic surgical system are disclosed. An ophthalmic surgical system may include a handheld probe. The probe may include a housing sized and shaped for grasping by a user. The probe may include a tip extending from the housing and being sized to penetrate and treat an eye of a patient. The tip may include an aspiration lumen arranged to carry fluid away from the eye. The probe may include a peristaltic pump disposed within the housing. The pump may include a roller in contact with a deformable conduit in fluid communication with the aspiration lumen. The roller may be arranged to deform the conduit while in contact therewith. The pump may also include a roller driver in contact with a periphery of the roller in a manner that moves the roller along the conduit to urge the fluid through the conduit.

A nanofriction power generation device with spiral vibrating balls and a buoy body thereof-includes an inner spiral barrel, an outer spiral barrel sleeved outside the inner spiral barrel, hollow balls between the two spiral barrels, an electric energy storage device contained in the inner spiral barrel, and a buoy barrel for containing the outer spiral barrel. The outer wall of the inner spiral barrel and the inner wall of the outer spiral barrel are respectively provided with first spiral tracks and second spiral tracks extending from one end to the opposite other end. The inner spiral barrel is in the outer spiral barrel, and the first spiral tracks and the second spiral tracks have a one-to-one correspondence and form spiral channels. Nanofriction electric generator films are attached to an outer surface of each hollow ball and an inner wall of each spiral channel.