LEAF SEAL, IN PARTICULAR FOR A GAS TURBINE, AND METHOD OF PRODUCING IT

• Main Authors: SCHNELL, ALEXANDER, HOEBEL, MATTHIAS, BREHM, WALTER, RHODES, NIGEL ANTHONY
• Format: Patent
• Language: English; French
• Published: 06.03.2012
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

The invention relates to a lamellar seal for sealing a shaft rotating about an axis, especially in a gas turbine, said seal comprising a plurality of lamellae (25) that are interspaced one beneath the other, are arranged in a concentric circle about the axis, and are fixed in the position thereof by means of hard-soldering, the surfaces of the lamellae (25) being oriented essentially parallel to the axis. The aim of the invention is to connect the lamellae (25) in one such lamellar seal at a precisely defined distance, in a fixed and simple manner. To this end, the lamellae (25) are hard-soldered together by means of interlying spacer elements. Said spacer elements consist of a hard-soldering film (22) which enables the hard-soldered connection to be self-created by hard solder from the hard-soldering films (22). The soldering temperature is adjusted to an optimum value barely above the Solidus temperature of the hard-soldering film (22), whereby the hard-soldering film (22) is only partially melted, and liquid solder is efficiently prevented from penetrating the gap (G1, G2) between the lamellae (25).