A spar cap for a rotor blade of a wind power installation, having a longitudinal extent from a first end to a second end, a transverse extent orthogonal to the longitudinal extent, and a thickness orthogonal to the longitudinal extent and to the transverse extent. A method for producing a spar cap as mentioned at the outset. The spar cap has a longitudinal extent from a first end to a second end, a transverse extent orthogonal to the longitudinal extent, and a thickness orthogonal to the longitudinal extent and to the transverse extent, at least two tiers of a first fiber composite material, and at least one tier of a second fiber composite material, wherein the first fiber composite material has a matrix material and/or fibers which is/are different from that/those of the second fiber composite material, the second fiber composite material is disposed in a portion adjacent to the second end, in the direction of the thickness between the at least two tiers of the first fiber composite material, and the at least one tier of the second fiber composite material terminates ahead of the second end.

A roller bearing includes: inner and outer rings; rollers interposed between raceway surfaces of the inner and outer rings and having a roller outer circumferential surface; a cage retaining the rollers; and a DLC film on the roller outer circumferential surface. The DLC film includes a superficial layer having cavities provided therein to hold a lubricating agent. The rollers have a ratio of surface area occupied by the cavities of 40% or less, and the cavities have a size of 10 to 100 m when viewed in a plan view thereof. The DLC film can have a multilayered structure in which the superficial layer is layered on an additional layer, and the cavities can include a void of soft DLC present in the superficial layer and having a film hardness lower than that of the additional layer.

There is provided a wind turbine rotor blade having a rotor blade root and a rotor blade tip. The rotor blade has a lightning protection system with a lightning protection conductor which has a galvanic connection to the rotor blade root region. The lightning protection system has a region of the rotor blade surface, to which a heatable paint or a heatable coating is applied, wherein that region is galvanically coupled to the lightning protection conductor so that a lightning strike in the heatable paint can be suitably dissipated.

The disclosure relates to a carbon blade for a wind turbine with multiple down conductors, and more particularly, to a carbon blade for a wind turbine with multiple down conductors that includes multiple down conductors disposed thereon to reduce or prevent a potential difference between a plurality of points to be formed thereon from being generated.

A jointed wind turbine rotor blade includes a first blade segment and a second blade segment extending in opposite directions from a chord-wise joint. A beam structure extends span-wise from the first blade segment into a receiving section formed in the second blade segment. The receiving section includes opposite spar caps and opposite interconnecting webs. The spar caps have a constant thickness along the receiving section where the spar caps overlap with the beam structure and are formed of a material or combination of materials along the receiving section to produce a desired stiffness of the spar caps along the receiving section. The webs have a reduced amount of conductive material adjacent to a chord-wise joint between the blade segments.

A spar cap for a wind turbine blade of a wind turbine, the spar cap including at least one elongated beam is provided. The spar cap includes at least one electrically isolating material cover and at least one electrically conductive material cover, wherein an entire circumference of the beam is enclosed by at least one electrically isolating material cover and the entire circumference of the at least one electrically isolating material cover is enclosed by at least one electrically conductive material cover, whereby the electrically conductive material cover has at least one electrical interface for electrically connecting it to a down conductor of the wind turbine blade.

The disclosure relates to a carbon blade for a wind turbine with multiple down conductors, and more particularly, to a carbon blade for a wind turbine with multiple down conductors that includes multiple down conductors disposed thereon to reduce or prevent a potential difference between a plurality of points to be formed thereon from being generated.

The invention provides a lightning protection system for wind turbine blades with optimized injection means of lightning currents in conductive components of their shells. The injection means comprise a current receptor element (27; 47; 67) connected to the input cable of lightning currents and arranged over an area of a shell close to an electrically conductive component (22; 42; 62) and a current injection element (28; 48; 68; 69, 69) arranged over the electrically conductive component (22; 42; 62) and connected to the current receptor element (27; 47; 67) by at least two distribution cables (31, 32; 51, 52, 53; 71, 72, 73, 74).

A fan blade assembly for a gas turbine engine is provided. The fan blade assembly having: a non-linear composite airfoil; and a metal root removably attached to the non-linear composite airfoil.

A containment shell for a magnetic pump, the shell comprising: a body section having a continuous side wall defining a chamber, and an end wall closing the chamber at one end, the chamber being open at the other end, wherein the body section and the end wall are integrally formed from a matrix material in which chopped carbon fibre material is distributed.