JPS5875901U - Seal device at the tip of moving blade - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の動翼先端部のシール装置の構成を示す断
面図、第２図は本考案の動翼先端部のシール装置の一一
例を示す断面図である。 １・・・・・・動翼、２ａ、２ｂ・・・・・・漏洩防止
フィン、３・・・・・・タービンシュラウド、４・・・
・・・ケーシング、５・・・・・・膨張室、６・・・・
・・移動可能部材、７・・・・・・ばね、８・・・・・
・空間、９・・・・・・穴。FIG. 1 is a sectional view showing the configuration of a conventional rotor blade tip sealing device, and FIG. 2 is a sectional view showing an example of the rotor blade tip sealing device of the present invention. 1... Moving blade, 2a, 2b... Leak prevention fin, 3... Turbine shroud, 4...
...Casing, 5...Expansion chamber, 6...
...Movable member, 7... Spring, 8...
・Space, 9...hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 軸流流体機械の動翼先端の入口側と出口側とに設けた漏
洩防止フィンと動翼を覆うシュラウドとの間の流体漏洩
を防止するものにおいて、前記シュラウド内周面におけ
る動翼の漏洩防止フィンと対向する位置に、フィンの間
の膨張室とフィンの両方を周方向に囲み、かつ半径方向
に移動可能な部材を弾性体で半径方向に移動可能に支持
し、この半径方向に移動可能な部材とシュラウドとで囲
まれた空間を、ケーシング外部と接続してその空間の圧
力を可変にしたことを特徴とする動翼先端部のシール装
置。In an apparatus for preventing fluid leakage between leak prevention fins provided on the inlet side and outlet side of a rotor blade tip of an axial flow machine and a shroud covering the rotor blade, leakage prevention of the rotor blade on the inner peripheral surface of the shroud is provided. At a position facing the fins, a member that circumferentially surrounds both the expansion chamber between the fins and the fins and is movable in the radial direction is supported by an elastic body so as to be movable in the radial direction, and the member is movable in the radial direction. A sealing device for a rotor blade tip, characterized in that a space surrounded by a shroud and a shroud is connected to the outside of a casing to make the pressure in that space variable.