A power generator for generating power using a liquid that can alternatively flow at a lower flow rate and at a higher flow rate. The power generator includes a conduit and a rotor mounted in the conduit so as to be rotatable about a rotation axis. The rotor includes a top set of blades provided in a conduit top portion and configured for rotating about the rotation axis when the liquid flows at the higher flow rate in the conduit. The rotor also includes a bottom set of blades provided in a conduit bottom portion and configured for rotating about the rotation axis when the liquid flows at the lower flow rate in the conduit. An output shaft protrudes from the conduit and is rotatable by at least one of the top and bottom sets of blades. The top and bottom blades have different configurations.

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 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 repectively 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.

A power generator for generating power using a liquid that can alternatively flow at a lower flow rate and at a higher flow rate. The power generator includes a conduit and a rotor mounted in the conduit so as to be rotatable about a rotation axis. The rotor includes a top set of blades provided in a conduit top portion and configured for rotating about the rotation axis when the liquid flows at the higher flow rate in the conduit. The rotor also includes a bottom set of blades provided in a conduit bottom portion and configured for rotating about the rotation axis when the liquid flows at the lower flow rate in the conduit. An output shaft protrudes from the conduit and is rotatable by at least one of the top and bottom sets of blades. The top and bottom blades have different configurations.

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.

Disclosed systems and devices relate to generating energy using spherical wind turbines with dimples. The systems, devices, and methods described herein relate to a wind turbine with no blades or propellers. Currently, wind turbines with blades or propellers can have their functionality impaired by the presence of dust, soot, or ash particles in the air. This makes it difficult to operate current wind turbines in certain harsh environments. In this device, a spherical shell entirely encapsulates the generator, such that dust, soot, or ash particles do not interfere with the turbine. In some embodiments, the dimples capture wind to rotate the spherical shell. In some embodiments, the outer surface of the spherical shell is covered with flexible solar cells. In some embodiments, the flexible solar cells sit inside the dimples.

Multi-resonant control of a 3 degree-of-freedom (heave-pitch-surge) wave energy converter enables energy capture that can be in the order of three times the energy capture of a heave-only wave energy converter. The invention uses a time domain feedback control strategy that is optimal based on the criteria of complex conjugate control. The multi-resonant control can also be used to shift the harvested energy from one of the coupled modes to another, enabling the elimination of one of the actuators otherwise required in a 3 degree-of-freedom wave energy converter. This feedback control strategy does not require wave prediction; it only requires the measurement of the buoy position and velocity.

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.

An assembly for harnessing a pendulum motion from fluid wave energy to convert to power. The assembly converts a fluid wave energy into electricity through a pendulum mechanism. The pendulum mechanism makes use of a buoyant sphere that floats in a fluid and absorbs wave energy, such as oscillations, vibrations, and disturbances known in wave energy, while floating in the fluid. A hemispherical pendulum swings in relation to the wave energy. The hemispherical pendulum transmits the swinging motion to an electrical generator for conversion to electricity. The harnessing of wave energy and swinging of the hemispherical pendulum is controlled through various components that balance and stabilize the assembly. The sphere comprises components to help control the irregularities from wave energy on the hemispherical pendulum through a directional guidance member, a velocity regulation member, and a stabilization member. A transmission cable transmits the electricity to a control center on shore.

Apparatus for converting wave motion on a body of water into electrical power, includes a floatable housing in which an electrical power generating unit is disposed. The electrical power generating unit includes a rotatable axle to which at least one electrical generator is connected. A weight is connected to the rotatable axle by an arm, so that when the weight rotates due to wave motion the electrical generator generates electrical power. In one embodiment gearing connects the electrical generator to the axle. In another embodiment the weight rolls on the floor of the housing. And in another embodiment the weight includes at least one battery.