SHROUD CONFIGURATIONS FOR TURBINE ROTOR BLADES

• Main Authors: LISA DEBELLIS, ZHANG XIUZHANG JAMES, KIRTLEY KEVIN RICHARD
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2018
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; CYLINDERS; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GAS-TURBINE PLANTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PISTONS; SEALINGS; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a turbine rotor blade that includes a tip shroud attached to an outboard tip of an airfoil.SOLUTION: The tip shroud may include an axially and circumferentially extending planar component in which an inboard surface opposes an outboard surface, and a shroud edge that connects the inboard surface to the outboard surface and defines an outboard profile of the tip shroud. The tip shroud may include a seal rail protruding from the outboard surface of the tip shroud, and a cutter tooth disposed on the seal rail. The cutter tooth may be formed as a circumferential section of the seal rail that is axially thickened. The seal rail may further include a leakage gap formed therethrough that is configured to increase a leakage level during operation.SELECTED DRAWING: Figure 1 【課題】エーロフォイルの機外側先端部に取り付けられた先端シュラウドを含むタービンロータブレードを提供すること。【解決手段】先端シュラウドは、機内側表面が機外側表面の反対側にある、軸方向および周方向に延在する平面状の構成要素、ならびに、機内側表面を機外側表面に接続し先端シュラウドの機外側の外形を画定するシュラウド縁部を含み得る。先端シュラウドは、先端シュラウドの機外側表面から突出する封止レール、および封止レール上に配設されたカッター歯を含み得る。カッター歯を、軸方向に厚くした封止レールの周方向の区域として形成できる。封止レールは、これを通して形成された、動作中の漏出レベルを高めるように構成される漏出間隙をさらに含み得る。【選択図】図１