The hydraulic power recovery turbine comprises a casing and a rotor arranged for rotation in the casing. The rotor comprises a rotor shaft and at least one impeller mounted on the rotor shaft. The rotor shaft is supported by bearings arranged in respective bearing housings. The drive-end bearing housing further houses a clutch, which connects the rotor shaft to an output shaft of the hydraulic power recovery turbine extending from the drive-end bearing housing.

A flywheel is attached to a shaft of a turbine. As the shaft rotates, the flywheel swings outwards away from the shaft and regulates the angular velocity of the rotating shaft. In an embodiment, there are multiple flywheels attached to the shaft. In another embodiment there is a first flywheel that controls a second flywheel. In another embodiment, the flywheel has adjustable or centrifugal displacement of counterbalanced masses for effective rotational diameter with effective rotational balance. In another embodiment, a small pilot centrifugal displacement flywheel may control a clutch by rotational velocity and may include a hysteresis control. An example of a clutch may limit that degree to which the arms of the flywheel may be extended and/or retracted. In another embodiment, a small pilot centrifugal displacement flywheel controls the hysteresis of a centrifugal flywheel displacement.

A joint member for a wind power generation apparatus includes: a first rotor integrally rotating with an output shaft of a speed increaser; a second rotor integrally rotating with an input shaft of a generator; and a one-way clutch provided between the first rotor and the second rotor. A torsion promoting portion being readily twisted and elastically deformed is provided at a portion of the first rotor where power is transmitted from the output shaft to the one-way clutch.

Provided is a wind power generation method capable of efficiently generating electricity while preventing beforehand a rotor from stalling.

A generator 3 is connected to a vertical main shaft 5 of a rotor 2 via a clutch 9. The method comprising following steps to be repeated; disconnecting the clutch when the rotor is rotating at or below a predetermined average wind speed, to idle the rotor, connecting the clutch for generating power by the generator when the rotor reached a specific peripheral speed or rotational speed, disconnecting the clutch again when the rotor is rotating at or below the predetermined average wind speed to idle the rotor until reach the specific value of peripheral speed or rotational speed, and connecting the clutch again for generating power by the generator when the rotor reached the specific value.

A wave power generator contains: a rotary shaft, a drive gear, a rotary accelerator, and a power generation set. The rotary shaft includes a first gear set fixed by using a first bearing and includes a second gear set mounted by using a second bearing, and a fixing direction of the first bearing is opposite to the second bearing. The drive gear is disposed on the rotary shaft so as to drive the rotary shaft to rotate reciprocately, wherein a chain is connected with the drive gear so as to pull a floating member to move reciprocately. A first end of the rotary accelerator is joined with the first gear set, and a second end of the rotary accelerator is coupled with the second gear set via a clutch gear. An input end of the power generation set is in connection with an output shaft of the rotary accelerator.

A one-way clutch structure includes: a pair of clutch members disposed between an output shaft and a drive shaft so as to oppose each other in an axial direction; and an engagement element interposed between these clutch members. When a rotation speed of the output shaft exceeds a rotation speed of the drive shaft, the engagement element engages with the clutch portion to connect the output shaft and the drive shaft so as to be integrally rotatable. When the rotation speed of the output shaft becomes lower than the rotation speed of the drive shaft, the engagement of the engagement elements is released to cut off connection between the output shaft and the drive shaft.

A joint structure includes a clutch unit interposed between a shaft joint and a shaft body which is one of an output shaft of a speed increaser and an input shaft of a power generator. The clutch unit includes: a shaft coupling portion rotating integrally with the shaft body; a joint coupling portion rotating integrally with the shaft joint; and a one-way clutch provided between the shaft coupling portion and the joint coupling portion. The one-way clutch makes a connection integrally rotatably between the shaft coupling portion and the joint coupling portion in a state in which a rotation speed of the output shaft is higher than that of the input shaft, and releases the connection between the shaft coupling portion and the joint coupling portion in a state in which the rotation speed of the output shaft is lower than that of the input shaft.

An automatic and intelligent clutch-type wind turbine system clutch-type wind turbine system is revealed. A rotor-blade base is disposed with rotor blades and connected to a main shaft. A gearbox of a split gearbox is connected to the main shaft while a turbine-driven set of the split gearbox is connected to a power shaft. A plurality of sets of disc generators is connected to the power shaft and a synchronous clutch is arranged between the two adjacent disc generators. A battery is connected to each disc generator. Thereby electricity is generated by the wind turbine system without being affected by wind force from surrounding area and the electricity is not wasted on braking. During the electricity generation process, the energy stored is converted into kinetic energy for assistance in generating electricity. Thus not only the power generation efficiency is improved, the total production cost is also reduced.

A one-way clutch includes: a plurality of engaging elements which restrict relative rotation toward the other side of a circumferential direction by engagement with an inner ring outer circumferential surface and an outer ring inner circumferential surface and which allows the relative rotation along the other side of the circumferential direction by releasing the engagement; and a ring-shaped cage which holds the engaging elements. In a clutch unit, a positioning member which is capable of contact a side surface of the cage in an axial direction and which positions the cage along the axial direction is provided between the one-way clutch and a rolling bearing.

A wind turbine, including a transmission, a transmission shaft acting as transmission output, a generator, a generator shaft acting as generator drive and a coupling connecting the transmission shaft and the generator shaft to one another, is characterized in that the generator shaft is designed as a hollow shaft, the coupling is disposed such that the coupling is connected to the generator shaft on the side of the generator facing away from the transmission, and the transmission shaft passes through the generator shaft and is connected to the coupling.