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57results about How to "Saving in mass" patented technology

Fastening a CMC combustion chamber in a turbomachine using brazed tabs

A turbomachine has inner and outer annular shells of metal material containing, in a gas flow direction F, a fuel injector assembly, an annular combustion chamber of composite material, and an annular nozzle of metal material forming the fixed-blade inlet stage of a high pressure turbine. Provision is made for the combustion chamber to be held in position between the inner and outer metal annular shells by a plurality of flexible metal tabs having first ends interconnected by a metal ring fixed securely to each of the annular shells by first fixing means, and second ends fixed by second fixing means on a ring of composite material fixed securely to said composite material combustion chamber, the flexibility of said metal fixing tongues allowing expansion to take place freely in a radial direction at high temperatures between said composite material combustion chamber and said metal annular shells.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A

Method and apparatus for balancing the emission current of neutralizers in ion thruster arrays

An apparatus and method for balancing the emission current of neutralizers in ion thruster arrays is disclosed that allows a single power processing unit (PPU) to be used to drive the array. A typical embodiment includes at least one voltage-regulated power supply, each voltage-regulated power supply for driving a common element in each of the plurality of ion thrusters, the common element in each of the plurality of ion thrusters being coupled together at a common point, and a current balance circuit for providing a substantially balanced current to each neutralizer cathode of the plurality of ion thrusters by providing a voltage to the neutralizer cathodes relative to the common point.
Owner:THE BOEING CO

Wind turbine tower having a damper

The present invention relates to wind turbine towers and in particular to such towers having a damper for use when erecting the tower and prior to installing a nacelle on the top of the tower. The invention also relates to a method for damping wind turbine towers. One aspect of the invention involves a wind turbine tower (2) with an upper tower structure (24) and a damper (5) comprising, —a liquidless damper housing (7,8) fixed to the upper structure, —a cylindrical interior surface of the damper housing, and—a damper mass having a horizontal extent which is less than a horizontal extent of the cylindrical interior surface of the damper housing, and—at least one shock absorbing structure, where the damper mass is arranged to, when the tower oscillates, essentially stay in a standstill location, whereby a relative movement between the tower and the damper mass may cause an impact with between the tower mass and the shock absorbing structure dependent on the magnitude of the amplitude of the tower oscillation. A main technical progress is that the damper does not need detailed tuning to the towers natural frequency. As long as the damper mass is sufficient, it may be used for damping a range of tower sizes and heights.
Owner:VESTAS WIND SYST AS

Active body

An active body (1) includes flares (2, 6, 7) arranged adjacent, above, or behind each other, wherein at least one hydrophobic separating layer (3, 5) is integrated between the flares, or flare disks (2, 6, 7), thereby preventing the flares (2, 6, 7) from attaching or sticking. In one embodiment, the hydrophobic separating layer (3) is applied to at least one side of the flares (2), preferably as a powder preferably consisting of microspheres, or the like. In another embodiment, a separating disk is disposed between the flares (6, 7) as the separating layer (5), which in addition is anti-cohesive and anti-adhesive.
Owner:RHEINMETALL WAFFE MUNITION GMBH
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