A turbine with an associated shaftless electric generator is disclosed. The generator includes a rotor and a stator; a mounting plate rotatable with the rotor and a void along a central axis of the rotor. A plurality of blades extend from the mounting plate. Adjustable bearings are interposed between the rotor and the stator, the adjustable bearings being configured to support the mounting plate and the plurality of blades. A threaded adjustor rod located in the void may be manipulated to adjust tension on the adjustable bearings.

A generator is horizontally arranged in each plane central portion of horizontal frame bodies of a support frame body which is framed with the upper and lower horizontal frame bodies and a plurality of support poles, and a vertical main shaft of a vertical shaft rotor is integrally connected and supported between rotation shafts vertically facing each other of the upper and lower generators without using bearings to cooperatively move.

Described herein is a rotor blade assembly (100) and a method for generating a lift in a fluid installation. The rotor blade assembly includes an arcuate rotor blade (102) that is configured to be rotated about its axis Y. One or more motion transmitting members (106, 114, 116) are provided that connect the arcuate rotor blade with at least one power generating member (104) for transmitting torque from the arcuate rotor blade to the at least one power generating member (104). The fluid incident on the arcuate rotor blade is caused to flow over a first leading edge L1 of a rotor blade towards a central rib R of the rotor blade (102). This fluid flow is then caused to flow along the central rib R of the rotor blade towards a stem section of the rotor blade from where the fluid exits, thereby causing rotation of the rotor blade.

A generator is horizontally arranged in each plane central portion of horizontal frame bodies of a support frame body which is framed with the upper and lower horizontal frame bodies and a plurality of support poles, and a vertical main shaft of a vertical shaft rotor is integrally connected and supported between rotation shafts vertically facing each other of the upper and lower generators without using bearings to cooperatively move.

EnergyMaster is an innovative floating hybrid tidal/wave/wind energy harvesting system based on vertical axis turbines for synergized tidal, wave and wind energy production in agriculture and aquaculture applications. EnergyMaster can continuously, and simultaneously, harvest wind and tidal energy in a wide range of wind and tidal current speeds, while providing excellent self-starting capability.

A wind turbine includes twin cross-flow turbines connected to a generator. The generator includes a shaft configured to be rotated when the turbines rotate. The wind turbine includes a first turbine rotatably movable around a first axis of rotation and including several blades distributed around the first axis of rotation. A second turbine is rotatably movable around a second axis of rotation and includes several blades distributed around the second axis of rotation. The first axis of rotation and the second axis of rotation are symmetrical to each other relative to a vertical axis. The first axis of rotation and the second axis of rotation are inclined relative to the vertical axis at an angle of inclination of between 25? and 50?.

The disclosure relates to vertical axis turbines comprising a blade support and two or more turbine blades. The blade support is configured to rotate about a central axis. The two or more turbine blades are secured to the blade support and configured to orbit the central axis during rotation of the blade support around the central axis. Each of the two or more turbine blades includes a first edge opposed to a second edge. The first edge is rounded and the second edge is sharp relative to the first edge, and includes first and second sides that extend between the first and second edges. At least one of the first and second sides includes a hook shaped recess, is configured to pivot relative to the blade support about a pivot axis that is offset from and parallel to the central axis.

A blade mounting system for turbine blades of use in vertical axis wind turbines includes a plurality of pairs of vertically spaced mounting units, each coupled to a framework, and between which a respective one of a plurality of turbine blades is pivotally coupled. Each mounting unit pivotally supports one end of a corresponding turbine blade and is linearly displaceable responsive to load forces on the turbine blade. Each mounting unit includes a restraint system that applies a bias force against the linear displacement of the mounting unit and the blade therewith. Each turbine blade has a cambered airfoil with reversible leading and trailing edges.

Described herein is a rotor blade assembly (100) and a method for generating a lift in a fluid installation. The rotor blade assembly includes an arcuate rotor blade (102) that is configured to be rotated about its axis Y. One or more motion transmitting members (106, 114, 116) are provided that connect the arcuate rotor blade with at least one power generating member (104) for transmitting torque from the arcuate rotor blade to the at least one power generating member (104). The fluid incident on the arcuate rotor blade is caused to flow over a first leading edge L1 of a rotor blade towards a central rib R of the rotor blade (102). This fluid flow is then caused to flow along the central rib R of the rotor blade towards a stem section of the rotor blade from where the fluid exits, thereby causing rotation of the rotor blade.

A novel blade pitch control technology for straight-bladed vertical-axis turbines for wind/wave/tidal energy harvesting is described. Flow physics was incorporated in the control mechanism to maximize turbine performance, including self-starting and energy harvesting efficiency.