Abstract: A damping device and a wind turbine generator system comprising the damping device. The damping device comprises: damping components; structural supports, the structural supports connecting the damping components to a mass block provided on an object to be damped, each structural support comprising a gear, and the gear being rotatably provided on the structural support; and guide rails, wherein each guide rail has a predetermined curvature, each guide rail has a first end used for being rotatably connected to the object to be damped and a second end supported on the corresponding structural support, a tooth portion engaged with a gear is formed on a side portion of each guide rail, and when the mass block swings, the swing of the mass block is converted into transmission by means of the engagement transmission between the guide rail and the gear for input into the corresponding damping component.

Abstract: A stranding machine is provided for producing a cord from a plurality of wires, preferably metal wires. The stranding machine has a stranding device for stranding the wires, including at least one rotatably mounted deflecting roller for deflecting the cord and at least one guide device for guiding the cord. The guide device is arranged in such a way that the cord can be guided on a straight line from the guide device to the deflecting roller in such a way that the cord is pressed against a first flank of the deflecting roller. As the cord is deflected by the deflecting roller, the cord moves from the first flank into the roller base of the deflecting roller.

Abstract: A device as well as a method for determining the diameter of a yarn balloon (B) formed by a continuous yarn at a workstation (1) of a yarn balloon forming textile machine. The workstation (1) comprises an electromagnetically functioning sensor means (33), designed and arranged in such a way that at least two interruptions of a measuring beam (42) of the sensor means (33) are caused by the yarn (5, 25) forming the yarn balloon (B) during every rotation of the yarn balloon (B) during the operation of the workstation (1), and in that the time interval between the interruptions of the measuring beam (42) can be recorded by the sensor means (33) and used for calculating the diameter of the yarn balloon (B).

Abstract: An apparatus for producing an inner spiral grooved tube, the apparatus includes first and second bobbins, one of which is an unwinding bobbin and the other of which is a winding bobbin; a floating frame that supports a shaft of the first bobbin; a rotary shaft that supports the floating frame though bearings and rotates in a direction perpendicular to an axis of a bobbin in the floating frame; a revolving flyer configured to invert a tube route of a tubular material between the first bobbin and the second bobbin, to convey the tubular material, and to revolve the tubular material around the floating frame as being supported by the rotary shaft; and first and second drawing dies positioned on a front stage and a rear stage of the revolving flyer, respectively, in the tube route of the tubular material

Abstract: A method for operating a spindle (2) of a two-for-one twisting or cabling machine which has an adjustable balloon-yarn-guide-eye (9), wherein for the operation of the spindle (2) under production conditions, the balloon-yarn-guide-eye (9) is adjusted, on the basis of a measured value (i) correlating with the energy consumption of the spindle drive (3), to a first operating position (AP1), in which a position-dependent minimum of the energy consumption of the spindle drive (3) is reached.

Abstract: A hybrid cord formed from a plurality of component plies wherein at least two of the plies are of unequal ply length regardless of the twist of the plies and at least one of the plies has a length that is from 1 to 50 percent longer than the other plies and a method of providing a cord with predetermined twist and component ply lengths.

Abstract: A method and apparatus for production of a yarn, by plying, twisting or covering several basic yarns, subjected to a prior transformation, is provided. At least one of the basic yarns is different from the others and/or is subjected to a different prior transformation. The prior transformation may be carried out in parallel in the same machine, by independent transformation members able to be independently controlled. A slackening of yarn tension resulting from the prior transformation to give the desired tension at an assembly point is carried out on yarn feeding devices. Routing of the yarns is achieved by guide members towards the point of assembly, where the staple yarns are combined and arranged in parallel. A bobbin receives the assembled yarns in a device, constituting or associated with a positive feed device operating without slippage with relation to the yarn.

Abstract: Blocking device of the unwinding of the threads from the feeding bobbins of a twisting spindle with superimposed bobbins inserted on their hollow pin, in which the threads are blocked with mechanical interceptors brought into their unwinding range at the entrance of the respective hollow pins and activated by means of sensors of the twisted thread situated downstream of the thread-guide curl.

Abstract: A method of covering a core yam with a cover yarn characterised in that it includes supplying a package of core yam on a member which is fixed against rotation, supplying a package of cover yam, guiding the cover yarn to form a loop which on rotation about an axis defines an envelope which surrounds the core yarn package, drawing off core yarn along the axis of rotation of the envelope in the direction away from the cover package so that when the core yarn intercepts the envelope it is covered by cover yarn.

Abstract: The present invention relates to a method and an apparatus for manufacturing a steel cord. A method according to the present invention comprises the steps of: combining a plurality of the steel filaments supplied from the bobbin by means of the guide rollers; applying a twist pattern to the combined filaments by rotating a pair of flyers arranged between a pair of turn rollers in the counterclockwise direction, and advancing them; applying a further twist pattern to the advanced cord by rotating another pair of flyers arranged between another pair of turn rollers in the reverse direction; stabilizing the cord by means of the overtwist; and winding the resulted cord. The method and apparatus for manufacturing the steel cord have effects that productivity can be improved up to two times or six times even with the same revolution, as compared with the manufacturing apparatus of the prior art.