A wind turbine blade includes a protective cover attached along the blade by a layer of adhesive. The adhesive is a general purpose adhesive, and the adhesive forms a joint or sealing between an outer edge of the cover section of the blade and the surface of the blade so that the outer edge is covered by the adhesive and so that the joint forms an oblique surface from the outer edge to the surface of the blade. The joint has a first height at the outer edge and a second height at the position where it ends at the surface of the blade. The second height is smaller than the first height and smaller than 0.2 millimetres, and the joint is integrally formed with the layer of adhesive.

A rotor blade uses hot-air, for example exhaust from a generator positioned inside a nacelle of a wind turbine, for de-icing and/or anti-icing. The rotor blade has an airfoil section and a cavity enclosed therein. A flow path inside the cavity, for flow of the hot-air, extends from a root section towards a tip section. Exhaust holes, fluidly connected with the flow path, at an outer surface of the airfoil section emit the hot-air from the airfoil section. The rotor blade includes a cover plate positioned at the outer surface of the airfoil section and masking the exhaust holes, thereby creating an external flow space between the exhaust holes and the cover plate's inner surface. The cover plate guides the hot-air over the outer surface of the airfoil section after the hot-air exits, via the exhaust holes, the airfoil section and before the hot-air escapes the rotor blade.

The invention relates to the use of phase change materials (PCMs) to delay icing or to cause de-icing in different wind-driven power generator elements. The invention also relates to the method for delaying icing or causing de-icing in different wind-driven power generator elements based on the use of phase change materials (PCMs), said method comprising: a) obtaining the PCMs, and b) incorporating the PCMs obtained into different wind-driven power generator elements.

The blowing device includes an impeller that is rotatable about a center axis and a motor that drives the impeller. The impeller includes a plurality of vanes arranged in a circumferential direction, a flange in which the plurality of vanes are provided at the outer circumferential edge in a radial-direction outside, and a plate-shaped first shielding unit located between the vanes adjacent to each other in the circumferential direction. The first shielding unit is connected to a rear edge surface on an opposite side to the rotation direction of the vane and an outside surface located on the radial-direction outside of the flange.

A wind turbine blade includes a first blade segment and a second blade segment extending in opposite directions from a chord-wise joint. Each of the blade segments having a pressure side shell member, a suction side shell member. The blade further including a coupling component extending spanwise and structurally connecting the first blade segment and the second blade segment. A thermal actuation component is coupled to the coupling component and passively actuated in response to a change in thermal conditions so as to provide for aeroelastic tailoring and pitch control to the wind turbine blade.

A silk fibroin-based multi-responsive soft actuator and a manufacturing method therefor are provided. The soft actuator includes a silk fibroin membrane and a flexible substrate, the silk fibroin membrane being arranged on and tightly bonded with the flexible substrate to form a double-layer membrane structure, thermal expansion coefficients of the silk fibroin membrane and the flexible substrate being different. The manufacturing method for a soft actuator includes: performing plasma processing on a flexible substrate; then scrap-coating the flexible substrate with a silk fibroin wet membrane, drying same to obtain a silk fibroin membrane, the silk fibroin membrane together with the flexible substrate forming a double-layer membrane; soaking the double-layer membrane into water, and then drying same; and integrally or locally soaking in a calcium chloride aqueous solution the silk fibroin membrane in the dried double-layer membrane, then taking out same, and drying same to obtain a soft actuator.

A stator frame configured to carry a stator core of a vertical axis hydroelectric generator includes at least one stator foot that supports a weight force of the stator frame. The stator foot includes a frame side part and a ground side part, wherein the frame side part and the ground side part are slidable relative to each other. The ground side part and the frame side part have complimentary shapes such that the weight force exerted from the stator frame on the stator foot results in a reaction force on the stator frame that is non-parallel to the weight force.

A silk fibroin-based multi-responsive soft actuator and a manufacturing method therefor are provided. The soft actuator includes a silk fibroin membrane and a flexible substrate, the silk fibroin membrane being arranged on and tightly bonded with the flexible substrate to form a double-layer membrane structure, thermal expansion coefficients of the silk fibroin membrane and the flexible substrate being different. The manufacturing method for a soft actuator includes: performing plasma processing on a flexible substrate; then scrap-coating the flexible substrate with a silk fibroin wet membrane, drying same to obtain a silk fibroin membrane, the silk fibroin membrane together with the flexible substrate forming a double-layer membrane; soaking the double-layer membrane into water, and then drying same; and integrally or locally soaking in a calcium chloride aqueous solution the silk fibroin membrane in the dried double-layer membrane, then taking out same, and drying same to obtain a soft actuator.