A power generation plant including a turbine (1) of a Kaplan, bulb, diagonal flow or propeller turbine type, a water intake (4) and a water run-off (5). Additional vanes vane (8) are deployable into a water passage formed between the water intake (4) and the housing of the turbine. Eddy flows formed in the water intake (4) are reduced by the additional vanes. The vanes allow the turbine operating range to be extended to cover smaller outputs.

A stator for a generator of a wind turbine includes stator segments including a lamination stack, and a stator support structure with segments extending in an axial direction and being adjacently located in a circumferential direction to form a ring-like structure, wherein each support structure segment includes at least one longitudinal carrier element, which extends in an axial direction and includes a stator segment-sided lamination attachment section for fixing the carrier element to the respective stator segment using a lamination attachment assembly, wherein the lamination attachment assembly for each carrier element includes: a counter bearing element to be inserted into a cavity of the lamination stack and extending at least essentially over the complete axial length of the stator segment, a stiffening bar to be placed inside the carrier element on the lamination attachment section, extending at least essentially over the complete axial length of the support structure segment.

A fluid driven turbine apparatus includes a hollow body and rib plates annularly disposed in the hollow body. A vane module is disposed in the hollow body and co-axially connected to a shaft extending axially through the hollow body. The rib plates surround the vane module and are spaced apart from the vane module by an annular gap. The annular gap has a width gradually enlarged in a top-to-bottom direction. When fluid flows into the vane module and is diverted sideward to the annular gap, large sand grains carried by fluid may pass through an enlarged lower portion of the annular gap without getting stuck therein and abrading the rib plates and the vane module.

The wind power generation system comprises a generator, a shaft, at least one leaf group and at least one wind-guiding structure. The generator includes a rotor, and the shaft is connected to the rotor. The leaf group includes a movable barrel, at least one first blade, at least one propeller blade, a plurality of pressurized channels, a first vortex chamber and a decompression chamber. The movable barrel is movably sleeved on the shaft. The first blade is connected to the activity barred. The propeller blade is connected to the movable barrel and above the first blade.

The invention relates to a flow machine (10), in particular a radial compressor, comprising a rotor (11) with a rotor blade (12); a stator (13) with, preferably, a guide vane (17), the stator defining at least in sections, the at least one flow channel (14) leading to the rotor blades (12) of the rotor (11) and a flow channel (15) leading away from the rotor blades (12) of the rotor (11); the stator (13) comprising, in the region of at least one flow channel (14, 15) at least one foam-like porous sound damping element (23).

The wind power generation system comprises a generator, a shaft, at least one leaf group and at least one wind-guiding structure. The generator includes a rotor, and the shaft is connected to the rotor. The leaf group includes a movable barrel, at least one first blade, at least one propeller blade, a plurality of pressurized channels, a first vortex chamber and a decompression chamber. The movable barrel is movably sleeved on the shaft. The first blade is connected to the activity barred. The propeller blade is connected to the movable barrel and above the first blade.

A water flow turbine arrangement is disclosed which can be used for capturing energy from water flows. The arrangement comprises: a base member (212): a generally open support structure (210) mounted to the base and upstanding therefrom, the support structure including plural legs (216) joined by a cross brace at or adjacent their upper ends; an electrical generator (230) mounted to the base; and shaft mounted turbine blades (220) mounted for rotation generally within the space occupied by the legs about a turbine axis. The turbine shaft (222) is supported at its upper end by the cross brace and is coupled to the generator at its lower end by a magnetic torque transmitting coupling, allowing complete fluid sealing of the generator's housing.

A stator for a helical gear device includes a first section having first helically convoluted chamber with a set of radially inwardly extending lobes and a second section adjacent to the first section. The second section includes a stack of cutter disks. Each cutter disk includes a front surface, a rear surface, an interior surface defining a central opening extending from the front surface to the rear surface, a forward cutting edge, and a rearward cutting edge. The interior surface forms a same number of lobes for the central opening as the set of radially inwardly extending lobes in the first section. Each cutter disk is aligned along a common centerline, and each cutter disk is rotated slightly relative to each other to form a second helically convoluted chamber with a same pitch as the first helically convoluted chamber. The second helically convoluted chamber exposes, to materials passing through, portions of the forward cutting edge or the rearward cutting edge of each cutter disk.

A fluid driven turbine apparatus includes a hollow body and rib plates annularly disposed in the hollow body. A vane module is disposed in the hollow body and co-axially connected to a shaft extending axially through the hollow body. The rib plates surround the vane module and are spaced apart from the vane module by an annular gap. The annular gap has a width gradually enlarged in a top-to-bottom direction. When fluid flows into the vane module and is diverted sideward to the annular gap, large sand grains carried by fluid may pass through an enlarged lower portion of the annular gap without getting stuck therein and abrading the rib plates and the vane module.

A progressive cavity pump system on a well includes a holdback apparatus. The holdback apparatus has a housing and a one-way bearing in the housing. The housing attaches to the drive head on the well. The one-way bearing allows the motor to drive the pump. The one-way bearing prevents reverse rotation, preventing the sucker rod from unwinding and fluid above the pump from draining, when the pump loses power.