A high-efficiency compressor section (10) for a gas turbine engine is disclosed. The compressor section includes a vane carrier (12) adapted to hold ring segment assemblies (16) that provide optimized blade tip gaps (28,29) during a variety of operating conditions. The ring segment assemblies include backing elements (30) and tip-facing elements (32) urged into a preferred orientation by biasing elements (40) that maintain contact along engagement surfaces (44,46). The backing and tip-facing elements have thermal properties sufficiently different to allow relative growth that strategically forms an interface gap (42) therebetween, resulting in blade tip gaps that are dynamically adjusted operation.

A high-efficiency compressor section (10) for a gas turbine engine is disclosed. The compressor section includes a vane carrier (12) adapted to hold ring segment assemblies (16) that provide optimized blade tip gaps (28,29) during a variety of operating conditions. The ring segment assemblies include backing elements (30) and tip-facing, elements (32) urged into a preferred orientation by biasing elements (40) that maintain contact along engagement surfaces (44,46). The backing and tip-facing, elements have thermal properties sufficiently different to allow relative growth and geometric properties strategically selected to strategically form an interface gap therebetween (42) resulting in blade tip gaps that are dynamically adjusted operation.

A device (1) for enabling access to a rotor blade (2) of a wind turbine is described, said device (1) comprising a frame (3) having connecting means (4) located at an upper region of said frame (3) and being structured in the range to be connected to a hoisting device. Such a device should be of simple construction, which is easy to control. To this end said frame (3) is in form of a triangle, said connecting means (4) being located in a region of an edge of said triangle.

A present invention describes unique wind turbine assembly in a shape of closed hollow cylinder formed by two sets of three adjustable to positive and negative pitch horizontal blades supported instead of central shaft by three vertical cylindrical blades, which makes this turbine responsive to omni-directional wind. Proposed design concept provides with: Significant increase of turbine efficiency exceeding 60%, which after coupling this rotor with a generator of 60% efficiency leads to overall wind generator efficiency exceeding 40%. Low turbine inertia requiring moderate start up winds and reducing turbine vibrations. Noiseless turbine operation due to its rotation around vertical axis. Environmental friendliness as low operating speed does not generate strong turbulent air flow capable to challenge birds and bugs existence. No electronic control of blades angle of attack. Ease of manufacturing and maintaining together with their reduced cost. Conducted analysis of the proposed configuration of the wind turbine shows no necessity of additional top support for a personal use wind generator, while requires one for more powerful (community) wind turbines. Proposed additionally supporting turbine tetrahedron beam frame resolves this issue allowing increase of power of such wind generators.

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 vertical axis wind turbine, comprising, a plurality of blades, wherein the blades are an aerofoil, a rotor shaft, the rotor shaft further comprises a rotary section and a stationary section. The plurality of magnet rings further comprises a first magnet ring. The first magnet ring is attached to the rotary section of the rotor shaft and the second magnet ring is attached to the stationary section of the rotor shaft, wherein the first and second magnet rings are cylindrical magnets and comprises a hole in middle of the rings, the first magnet ring is attached to the rotary section of the rotor shaft further consists a particular charge and the second magnet ring is attached to the stationary section of the rotor shaft.

A method of guiding lightning to a lightning receptor of a rotor blade for a wind turbine, wherein the method includes the following steps: Generating a vortex of airflow by means of a vortex generator, the vortex generator being located at the surface of the rotor blade; attracting the lightning by the vortex; guiding the lightning to the lightning receptor is provided. Furthermore, the invention relates to a rotor blade for a wind turbine, wherein the rotor blade comprises a vortex generator for generating a vortex of airflow, the vortex generator being located at the surface of the rotor blade, and a lightning receptor for receiving an electrical current from the lightning. The vortex generator and the lightning receptor are arranged such with regard to each other that the lightning is guided to the lightning receptor by the vortex which is generated by the vortex generator.

A method for making a tower for a wind turbine includes: making tower sections, which can be arranged one on top of another; defining two separation lines running in a longitudinal direction for one of the tower sections and providing a longitudinal profile for a separation line, wherein the profile is formed as a single piece with two legs running parallel at a mutual distance; connecting the profile to the tower section, wherein the legs are connected to the tower section on opposing separation line sides; severing the tower section along the separation line into segments mutually separated by a segment boundary, wherein the monolithic profile is severed and each of the legs remains connected to a segment on a different side of the boundary; connecting segments by the legs of the severed profile to a tower section; and, connecting several tower sections to form a tower.

Provided is a marine current energy generating device for a deep sea cage. The marine current energy generating device includes a vortex vibration generating portion, where the vortex vibration generating portion is used for generating vortex vibration on a side facing away from a marine current; power generating portions, where several nano friction generators are arranged in the power generating portions, and the several nano friction generators generate power by using the vortex vibration generated by the vortex vibration generating portion and are electrically connected to each other; a guide portion, where the guide portion is used for making the vortex vibration generating portion perpendicular to a direction of the marine current all the time; and corrosion protection assemblies, where the corrosion protection assemblies are arranged at joints of the vortex vibration generating portion to the power generating portions and the guide portion.

A wind turbine blade for a wind turbine is a shell structure of a fiber-reinforced composite and comprises a root region and an airfoil region. The root region has a ring-shaped cross section and comprises a cylindrical insert 7 embedded in the fiber-reinforced polymer so as to substantially follow the circumference of the root region. The cylindrical insert is provided with a number of mutually spaced threaded bores 12, 15 in a first end 9 thereof being accessible from the outside.