A multi-piece fluid end that can be produced with fewer raw materials and at a lower cost. In one embodiment, a fluid end is formed from a first body attached to a separate second body. Their respective external surfaces may be engaged flushly, partially, or via one or more spacer elements. In some embodiments, the body pieces are flangeless to reduce stress on the fluid end. The second body may have a plurality of bores that are alignable with a plurality of corresponding bores formed in the first body. The second body may be connected to a power end using a plurality of stay rods. In other implementations, more than two body pieces may be utilized.

A tidal current energy generating device includes an outer frame (1), at least two inner frames (2), at least two mounting shafts (4), a driving unit (6), at least four horizontal-axis hydraulic generators (3), and at least six bearings (5). The at least two inner frames (2) are separably disposed in the outer frame (1), respectively. The at least two mounting shafts (4) are rotatablely disposed in the two inner frames (2), respectively, and the axial direction of the at least two mounting shafts (4) is perpendicular to the horizontal plane. The driving unit (6) is connected with the at least two mounting shafts (4) to drive the mounting shafts (4) to rotate. Every two horizontal-axis hydraulic generators (3) are fixed at one mounting shaft (4) and are disposed in the same inner frame (2). The at least four horizontal-axis hydraulic generators (3) change directions with the rotating of the mounting shaft (4). Every three bearings (3) are sleeved on one mounting shaft (4), and the three bearings (5) on one mounting shaft (4) are disposed on the two sides and the center of the two horizontal-axis hydraulic generators (3), respectively. The tidal current energy generating device can be maintained or replaced conveniently and can extend deeply in the sea.

The present device is a vertically oriented wind turbine blade having a rectangular simple curvilinear shaped blade, which includes a top edge, a bottom edge, an outer edge, an inner edge, an inner surface and an outer surface. The blade is formed using extrusion to approximate a uncompleted airfoil shape from the inner edge to the outer edge (relative to the turbine center or hub). The angle of attack, the solidity and the arms angle are designed to improve performance at low wind speeds.

A multi-piece fluid end that can be produced with fewer raw materials and at a lower cost. In one embodiment, a fluid end is formed from a first body attached to a separate second body. Their respective external surfaces may be engaged flushly, partially, or via one or more spacer elements. In some embodiments, the body pieces are flangeless to reduce stress on the fluid end. The second body may have a plurality of bores that are alignable with a plurality of corresponding bores formed in the first body. The second body may be connected to a power end using a plurality of stay rods. In other implementations, more than two body pieces may be utilized.

The present device is a vertically oriented wind turbine blade having a rectangular simple curvilinear shaped blade, which includes a top edge, a bottom edge, an outer edge, an inner edge, an inner surface and an outer surface. The blade is formed using extrusion to approximate a uncompleted airfoil shape from the inner edge to the outer edge (relative to the turbine center or hub). The angle of attack, the solidity and the arms angle are designed to improve performance at low wind speeds.

A method for producing a split rotor blade, a method for connecting a split rotor blade, a rotor blade, a rotor blade segment, a rotor, a wind power plant, and a production device for producing rotor blades. A method for producing a split rotor blade, comprising: providing a rotor blade having a spar cap and an extension in the longitudinal direction from a blade root region to a blade tip; making at least one groove in the spar cap, the groove being arranged in a first connection region of the rotor blade, and a portion of the main extension direction of the groove being oriented parallel to the longitudinal direction; splitting the rotor blade, in the first connection region, into a rotor blade section facing the blade root and a rotor blade section facing away from the blade root, a first groove section being arranged in the rotor blade section facing the blade root and a second groove section being arranged in the rotor blade section facing away from the blade root.

Provided is a busbar arrangement for a wind turbine generator, the wind turbine generator including a stator and a rotor arranged to rotate around an axis. The busbar arrangement includes a plurality of busbars for transporting electric power away from the generator, wherein each busbar is arranged at an individual radial distance from the axis and at an individual axial position along the axis. Furthermore, a wind turbine and a method of manufacturing a busbar arrangement is provided.

Provided is a busbar arrangement for a wind turbine generator, the wind turbine generator including a stator and a rotor arranged to rotate around an axis, the arrangement comprising a plurality of busbars for transporting electric power away from the generator, wherein each busbar is arranged at an individual radial distance from the axis and at an individual axial position along the axis. Furthermore, a wind turbine and a method of manufacturing a busbar arrangement is provided.

Traction air device with multiple wing contours for a wind power generation plant and wind power generation plant utilizing the air device.

A method for producing a split rotor blade, a method for connecting a split rotor blade, a rotor blade, a rotor blade segment, a rotor, a wind power plant, and a production device for producing rotor blades. A method for producing a split rotor blade, comprising: providing a rotor blade having a spar cap and an extension in the longitudinal direction from a blade root region to a blade tip; making at least one groove in the spar cap, the groove being arranged in a first connection region of the rotor blade, and a portion of the main extension direction of the groove being oriented parallel to the longitudinal direction; splitting the rotor blade, in the first connection region, into a rotor blade section facing the blade root and a rotor blade section facing away from the blade root, a first groove section being arranged in the rotor blade section facing the blade root and a second groove section being arranged in the rotor blade section facing away from the blade root.