A gravitational vortex variable flow energy system (GVvFES) is disclosed. An example embodiment includes: a turbine basin having an inlet portion and an outlet portion, the turbine basin having a hybrid conical shape; a generator installed adjacent to the turbine basin; a turbine blade hub having turbine blades attached thereto, the turbine blade hub being coupled to the generator with a turbine blade axle, the turbine blade hub being configured to achieve a variable and configurable height relative to a top of the turbine basin; and a diffuser installed beneath the outlet portion of the turbine basin, the diffuser being configured to achieve a variable and configurable height relative to a bottom of the turbine basin. An example embodiment also includes linkage to vary an angle or pitch of the turbine blades.

A system comprising a blade pitch system having a set of locking holes. A pitch drive assembly is coupled to the blade pitch system and configured to rotate clockwise or counterclockwise within a range of angular degrees to adjust a blade pitch angle. The system includes a pitch lock pin-and-hole system including an interface plate and at least one blade pitch lock assembly coupled to the interface plate. Each lock assembly includes a locking pin having a pin center axis parallel with a center axis of a locking hole to engage a respective one locking hole of the set to lock the blade pitch angle.

A turbomachine module with a longitudinal axis, the module comprising: a rotary casing rotatable around the longitudinal axis and arranged to carry a propeller provided with a plurality of blades; a system for changing the pitch of the blades of the propeller comprising: a control, and a mechanism for varying the pitch of the blades of the propeller connecting these blades to the control, wherein the control comprises a rotary actuator comprising a control body and a reference body which is integral with the rotary casing, and wherein the mechanism for varying the pitch comprises a synchronization ring which is driven in rotation around the longitudinal axis by the control body and which is guided in rotation on the rotary casing, the synchronization ring being connected to the blades.

A turbomachine module with a longitudinal axis, the module comprising: a rotary casing rotatable around the longitudinal axis and arranged to carry a propeller provided with a plurality of blades; a system for changing the pitch of the blades of the propeller comprising: a control, and a mechanism for varying the pitch of the blades of the propeller connecting these blades to the control, wherein the control comprises a rotary actuator comprising a control body and a reference body which is integral with the rotary casing, and wherein the mechanism for varying the pitch comprises a synchronization ring which is driven in rotation around the longitudinal axis by the control body and which is guided in rotation on the rotary casing, the synchronization ring being connected to the blades.

A device for recovering hydraulic energy of a swell includes a casing and a rotor. In embodiments, a rotor of the device for recovering the hydraulic energy of the swell includes a rim, a hub mounted inside the rim and secure with the rim, and a blade extending radially between the hub and the rim. The blade may be deformable under the pressure effect of the liquid medium flow and the rotor may include a holding means configured to hold the blade in a first deformed configuration for a liquid medium flow in a first direction.

A device for recovering hydraulic energy of a swell includes a casing and a rotor. In embodiments, a rotor of the device for recovering the hydraulic energy of the swell includes a rim, a hub mounted inside the rim and secure with the rim, and a blade extending radially between the hub and the rim. The blade may be deformable under the pressure effect of the liquid medium flow and the rotor may include a holding means configured to hold the blade in a first deformed configuration for a liquid medium flow in a first direction.

Pitch system (1) comprising at least one pitch motor drive (3) connected an electrical network (5). Each pitch motor drive (3) is connected to a power bank, and the pitch system comprises a test module adapted to be activated in a test position. The test module comprises a brake module (8) each connected to a pitch motor drive (3), and each brake module (8) is adapted to load a pitch motor drive (3) with a certain load Rb. Hereby a voltage drop takes place over the power bank (6). The power bank (6) is separated into a number of power blocks (9) and the voltage drop V of each power block (9) is adapted to be registered by the test module when the brake module (8) is activated.

Embodiments of the present invention generally relate to a runner unit of a tidal power plant, and more particularly to a device for reversing a blade of the runner unit. The device according to the embodiments is lighter and more efficient with respect to known solutions which involve articulated mechanisms as it is based on a reversing servomotor including an annular piston which acts on the blade to be reversed.

The present invention provides a turbine sub-runner that is positioned to be within the vortex zone of a turbine wicket gates (zone S-R, FIG. 1). The sub-runner includes at least two sub-runner blades, configured to monitor the relative flow of the vortex created by the wicket gates. A control mechanism is connected to the sub-runner shaft via gear and threaded interface, and is capable of transferring the relative (vs main-runner) rotational energy of the sub-runner into angular movement of the main runner blades. As the sub-runner interacts with the changing conditions of the main vortex within the zone S-R, it will act to automatically regulate, adjust, and control the angle of the main runner blades to optimize the performance of the turbine. The sub-runner uses the energy of the vortex existing in the zone S-R to perform the monitoring, regulation, adjustment and control of the main runner through regulating angular position of main runner blades.

This method is for orientating the blades (40) of a turbine (4) past a non-reachable range of positions (1, 2) in a power plant (2), said blades (40) being rotatable around orientation axes (X40) distinct from a rotation axis (X) of the turbine (4), the turbine (4) comprising means (42, 44, 46) for orientating the blades (40), said means being adapted to exert an adjustable torque on the blades (40). The method comprises steps consisting in a) stopping the energy production of the turbine (4), b) setting a water flow which runs the turbine (4) to a value inferior to a normal energy production value, c) rotating the turbine (4) in a motor mode using energy from a grid, d) adjusting the torque delivered by the means for orientating the blades (40) to a reduced value while the turbine (4) is still rotating, so that the blades (40) are free to rotate around their orientation axes (X40), under action of a hydraulic torque exerted by the water, past the non-reachable range of positions, e) once the blades (40) have overcome the non-reachable range of positions, adjusting the torque delivered by the means for orientating the blades (40) to a normal value superior to the reduced value, so that the rotation of the blades (40) around their orientation axis (X40) is stopped in a determined position.