A magnetically driven centrifugal pump has a pump case, an open vane impeller in the pump case, a stuffing box including a stuffing box outer being fixed relative to the pump case and a stuffing box inner threadedly engaged with the stuffing box outer, and a rotor axially fixed and rotatably mounted in the stuffing box inner. Bushings are arranged between the rotor and the stuffing box inner. A drive is fixed relative to the pump case and includes a drive output extending into the rotor. There is a magnetic coupling between the rotor and the drive and a canister fixed to the stuffing box and extending through the magnetic coupling to isolate the rotor from the drive. A rub ring closes the end of the stuffing box inner and constrains the drive output from damaging the canister under catastrophic bearing failure.

A harnessing module for harnessing renewable wind and water energy comprises opposing concentric wings for rotation about a shaft having a hub comprising at least one pair of opposing concentric wings for use in generating renewable electrical energy. Each concentric wing of the opposing concentric wings may have a circular leading edge for facing one of air and water flow, each concentric wing having a generally curved upper surface but for a curved downward surface and a sharp trailing edge opposite the circular leading edge of each concentric wing. The circular side and curved upper surface are preferably at a positive angle of attack where one of water or wind flow is received at the circular side and provides lifting rotation of the opposing concentric wings. Hence, the opposing concentric wings rotate about the turbine shaft and comprise a harnessing module for generating electricity from either the wind or water flow.

A pump system comprises a fluid housing, a permanent magnet rotor, and an electric stator. The fluid housing has an axis, an axial inlet, and a radially outer outlet. The permanent magnet rotor is disposed on the axis, within the fluid housing, and has a plurality of perimetrically distributed fins that extend at least partly radially outward. The electric stator is disposed on the axis and within the fluid housing, and is situated adjacent the impeller fins of the permanent magnet rotor, separated from the impeller fins by an axial gap.

Hydrokinetic fluid turbines utilize a flowing body of liquid to translate the kinetic energy of the fluid into electric power or other useful energy. The available kinetic energy is proportional to the squared fluid velocity in an open channel with a fixed cross-sectional area. The proposed twin turbine system coupled with a cycloidal magnetic gear exploits the hydrokinetic energy existing in open-channels.

A marine hydrokinetic electric power or wind power generator comprises a harnessing module, a controlling module, and a generating module, the harnessing module comprising one of a propeller and a waterwheel for receiving wind or water energy, the controlling module further comprising a magnetic gearbox for matching the expected wind or water generating power to an output power, a control motor, and a Hummingbird comprising first and second Transgears and simplifications and variations thereof has three variables, input, output and control and connects the three modules. The assembly of harnessing module, controlling module and the generating module comprises an input shaft from the harnessing module and a constant speed control motor which may be an alternating current or direct current control input and a generator for generating power output and works like a rotary frequency converter: the rotational speed (rpm) of the control input dictates the frequency to be generated. The generating module (generator) generates output power which comprises a multiple of at least ten times the power rating of the controlling module (the constant speed control motor). Principles of application of a Hummingbird comprising first and second Transgears in conjunction with those of a rotary frequency converter, and simplifications thereof, may be extended to infinitely variable transmissions for gasoline and electric vehicles and to pumps and compressors.

An energy generating device may include a first body portion with at least one first force input structure coupled to the first body portion and configured to receive an external force. The energy generating device also may include a second body portion, the second body portion rotatable relative to the first body portion. Further, the energy generating device may include an electrical generator configured to use the relative motion between the first body portion and the second body portion to generate electricity. The first body portion and the second body portion are configured to descend through a medium at least partially under the force of gravity or ascend through the medium at least partially by buoyant forces in such a way that the medium causes a force on the at least one first force input structure by impinging on the at least one force input structure causing relative rotation between the first body portion and the second body portion. An energy generating device may include at least one first body portion, at least one second body portion, at least one torque generator configured to cause relative rotation between the first body portion and the second body portion, and at least one electrical generator configured to use the relative motion between the first body portion and the second body portion to generate electricity, wherein the first body portion and the second body portion are configured to descend through a medium at least partially under the force of gravity or ascend through the medium at least partially by buoyant forces in such a way that the torque generator causes relative rotation between the first body portion and the second body portion.

Systems and methods for generating electricity from a fluid turbine are provided. In one aspect, the system employs a Tesla turbine to rotate a drive shaft, the drive shaft providing torque to operate an electrical generator. The incoming fluid flow that operates the Tesla turbine enters a hollow portion of the drive shaft and exists the system as an exhaust flow. The system may operate from standard water supplies provided to a residence or business, thereby reclaiming excess water pressure energy.

A wave energy converter utilizes a flotation module that rises and falls with the passage of waves, a submerged tube containing a constriction which multiplies the speed of the water passing therethrough, a turbine (or other hydrokinetic apparatus) positioned so as to extract energy from the accelerated flow of water within and/or through the tube, and a submerged gas- or liquid-filled chamber housing one or more energy conversion components (e.g. generators, transformers, rectifiers, inverters). By providing a chamber in proximity to the turbine, generators can be placed in closer proximity to the turbine that turns them, and the shared shaft can be shorter than if the generators were placed in the buoy adjacent to the surface.

A turbine rotor assembly including a unitary body including at least one inlet for inlet of a fluid into the rotor assembly and a plurality of flow channels extending through the unitary body and terminating in an outlet portion, the at least one inlet in fluid communication with each of the plurality of flow channels.

Provided is an electrical generator including a stator having a stator body extending axially between a first axial end and a second axial end, the stator body including a plurality of slots, the plurality of slots being circumferentially distributed around a longitudinal axis of the stator body. The stator includes a plurality of windings housed in the plurality of slots and a plurality of end-windings, each end winding having a curved shape and connecting the windings in two slots of the plurality of slots.

The electrical generator further includes at least one air guide inside and/or outside the plurality of end-windings.cool