Abstract: The invention relates to a rotor blade for wind energy installation, comprising at least one flange running in a longitudinal direction from a rotor blade root to a rotor blade tip, whereby a width of the flange decreases along the longitudinal direction. The invention also relates to a method for producing a rotor blade in that at least one flange with a width decreasing in the longitudinal direction is applied to a rotor blade inner wall, and to a laying assistance device for positioning strips of the flange.

Abstract: A gate valve includes a valve body and a spindle drive. The spindle drive has, at its one end, a wedge for blocking a pipe. The spindle drive includes a motor-driven spindle, wherein, wherein the spindle is connected by way of a coupling to a shaft in an axially displaceable manner, and the shaft has the wedge at its end.

Abstract: Carbon fibers and carbon fiber yarn consisting of carbon fibers, the fibers having been pretreated by electrochemical oxidation, characterized in that they have a finish consisting of epoxy resin(s), a vinyl component, and a plasticizer in an amount of 0.3 to 5 wt. % relative to the carbon fibers, which are to be provided with the finish.

Abstract: A pipeline shut-off device (10) comprising a tube section (10a) arranged in a pipeline (3) and having a shut-off member (19), wherein the shut-off member (19) can be destroyed in the closed position by a device (22) arranged in the region of the pipe section (10a), with the device for destroying the shut-off member (19) being able to be actuated from the outside.

Abstract: A gate valve for blocking a pipe, wherein the gave valve comprises a valve body and a wedge, which is insertable into a wedge receptacle disposed in the valve body, wherein the wedge has a wedge plate on at least one side in the passage direction of the pipe, which is disposed on the wedge with a clearance in the direction of the center longitudinal axis of the pipe, wherein the wedge plate is adapted to be pressed by at least one elastic element against the wedge receptacle in the valve body, wherein the at least one elastic element is configured as an approximately circular-shaped circumferential bellows having a central opening.

Abstract: A rotor blade attachment, in particular of a wind power plant, for the connection of a rotor blade with an attachment device, including a transverse pin and a connecting device, which can be brought together to establish an operative connection, wherein the connecting device defines a longitudinal axis. The rotor blade attachment is characterized in that the transverse pin in the direction of the longitudinal axis of the connecting device has a higher bending stiffness than transversally to the longitudinal axis. An alternative rotor blade attachment is characterized in that the transverse pins are arranged in at least two rows, wherein at least a first row is arranged closer to the blade-root-side end of the rotor blade than at least a second row.

Abstract: A rotor blade attachment, in particular of a wind power plant, for the connection of a rotor blade with an attachment device, including a transverse pin and a connecting device, which can be brought together to establish an operative connection, wherein the connecting device defines a longitudinal axis. The rotor blade attachment is characterized in that the transverse pin in the direction of the longitudinal axis of the connecting device has a higher bending stiffness than transversally to the longitudinal axis. An alternative rotor blade attachment is characterized in that the transverse pins are arranged in at least two rows, wherein at least a first row is arranged closer to the blade-root-side end of the rotor blade than at least a second row.

Abstract: The invention relates to a rotor blade attachment (17), in particular of a wind power plant (1), for the connection of a rotor blade (5) with an attachment device (4), including a transverse pin (20, 20?) and a connecting device (13, 21), which can be brought together to establish an operative connection, wherein the connecting device (13, 21) defines a longitudinal axis. The rotor blade attachment (17) is characterized in that the transverse pin (20, 21?) in the direction of the longitudinal axis of the connecting device has a higher bending stiffness than transversally to the longitudinal axis (18). An alternative rotor blade attachment (17) is characterized in that the transverse pins (20, 20?) are arranged in at least two rows (33, 34), wherein at least a first row (33) is arranged closer to the blade-root-side end (19) of the rotor blade (5) than at least a second row (34).

Abstract: A wind energy installation includes a tower and a nacelle arranged at the top of the tower such that it can swivel in the azimuth direction. The installation also includes a plurality of cables which are guided via a loop from the tower into the nacelle, the cables being held at a distance from one another in the loop by means of rotationally fixed and loose holders. The holders each have receptacles for attachment of the cables with a predetermined circumferential separation. The holders include a lower rotationally fixed guide ring and an aligning upper loose guide ring. A loop guide is formed such that the loop is subdivided by means of the rotationally fixed lower guide ring into a curved untwisted area and an extended twisted area.

Abstract: The invention relates to a rotor blade for wind energy installation, comprising at least one flange running in a longitudinal direction from a rotor blade root to a rotor blade tip, whereby a width of the flange decreases along the longitudinal direction. The invention also relates to a method for producing a rotor blade in that at least one flange with a width decreasing in the longitudinal direction is applied to a rotor blade inner wall, and to a laying assistance device for positioning strips of the flange.

Abstract: Reduction in power output or rotor speed of a wind turbine above a defined limit value, the reduction not being implemented based on the measured wind speed, but on an input value which on one hand is easily detected physically and by control technology and on the other hand is a good indicator of mechanical stresses on the wind turbine. The invention uses the rotor-blade angle as the input value in a manner that starting at the limit value, the reduction in power output or in rotor speed is adjusted as a function of the rotor-blade angle.

Abstract: The invention relates to a rotor blade attachment (17), in particular of a wind power plant (1), for the connection of a rotor blade (5) with an attachment device (4), including a transverse pin (20, 20?) and a connecting device (13, 21), which can be brought together to establish an operative connection, wherein the connecting device (13, 21) defines a longitudinal axis. The rotor blade attachment (17) is characterized in that the transverse pin (20, 21?) in the direction of the longitudinal axis of the connecting device has a higher bending stiffness than transversally to the longitudinal axis (18). An alternative rotor blade attachment (17) is characterized in that the transverse pins (20, 20?) are arranged in at least two rows (33, 34), wherein at least a first row (33) is arranged closer to the blade-root-side end (19) of the rotor blade (5) than at least a second row (34).

Abstract: Carbon fibers and carbon fiber yarn consisting of carbon fibers, the fibers having been pretreated by electrochemical oxidation, characterized in that they have a finish consisting of epoxy resin(s), a vinyl component, and a plasticizer in an amount of 0.3 to 5 wt. % relative to the carbon fibers, which are to be provided with the finish.

Abstract: A wind turbine equipped with a tower, a nacelle rotatably mounted on the tower, a rotor rotatable at the nacelle about a rotor axis of rotation and including one rotor hub and at least one rotor blade which is coupled by a blade bearing to the rotor hub while rotatable about a blade adjustment axis. The blade bearing includes an inner ring firmly affixed to the rotor hub and an outer ring that is fitted with a toothing and that is firmly connected to the rotor blade. The rotor blade is rotatable by a blade adjustment drive including a drive motor actuating a drive pinion meshing with the outer toothing of the outer ring.

Abstract: A device for monitoring a leakage current of a surge arrester has a measuring element for detecting a leakage current in a leakage current circuit. A filter assembly filters the leakage current in order to extract a third harmonic oscillation which is evaluated by an evaluation circuit with respect to the value thereof. The evaluation circuit delivers at least one warning signal to a display device. In a preferred embodiment, three display devices operating as a signaling light are provided. A power supply for the used circuits is obtainable by way of a transformer which extracts a necessary auxiliary zero-potential energy contained in the leakage current and with the aid of a main power supply unit connected to the transformer.

Abstract: Reduction in power output or rotor speed of a wind turbine above a defined limit value, the reduction not being implemented based on the measured wind speed, but on an input value which on one hand is easily detected physically and by control technology and on the other hand is a good indicator of mechanical stresses on the wind turbine. The invention uses the rotor-blade angle as the input value in a manner that starting at the limit value, the reduction in power output or in rotor speed is adjusted as a function of the rotor-blade angle.

Abstract: A device for monitoring a leakage current of a surge arrester has a measuring element for detecting a leakage current in a leakage current circuit. A filter assembly filters the leakage current in order to extract a third harmonic oscillation which is evaluated by an evaluation circuit with respect to the value thereof. The evaluation circuit delivers at least one warning signal to a display device. In a preferred embodiment, three display devices operating as a signaling light are provided. A power supply for the used circuits is obtainable by way of a transformer which extracts a necessary auxiliary zero-potential energy contained in the leakage current and with the aid of a main power supply unit connected to the transformer.

Abstract: A wind turbine equipped with a tower, a nacelle rotatably mounted on the tower, a rotor rotatable at the nacelle about a rotor axis of rotation and including one rotor hub and at least one rotor blade which is coupled by a blade bearing to the rotor hub while rotatable about a blade adjustment axis. The blade bearing includes an inner ring firmly affixed to the rotor hub and an outer ring that is fitted with a toothing and that is firmly connected to the rotor blade The, rotor blade is rotatable by a blade adjustment drive including a drive motor actuating a drive pinion meshing with the outer toothing of the outer ring.

Abstract: An overvoltage arrester for high or medium voltage is described which includes an arrester block arranged inside a sealed, gas-tight enclosure housing, a sensor, in 5 particular a temperature sensor in the form of a surface wave sensor, is arranged inside the enclosure housing. The surface wave sensor is arranged in a housing that is designed as an antenna.

Abstract: Disclosed and claimed is a process for selectively separating hydrogen halides from sulfur-dioxide-containing gases by using an adsorbent made from a porous ceramic support material which is impregnated with an alkaline earth metal salt solution and, after evaporation of the solvent, the alkaline earth metal salt is pyrolysed at 200.degree. to 800.degree. C. to give alkaline earth metal oxide .Xh.sub.2 O, where x is a number from 0 to 1.