JPS6081203U

JPS6081203U - turbine moving blade

Info

Publication number: JPS6081203U
Application number: JP17230183U
Authority: JP
Inventors: 哲男笹田; 義明山崎
Original assignee: 株式会社日立製作所
Priority date: 1983-11-09
Filing date: 1983-11-09
Publication date: 1985-06-05

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

[Brief explanation of the drawing]

第１図は従来の多断軸流タービンの子午断面図、第２図
は従来のタービン動翼の根元部イ、中央部口、先端部へ
の断面形状と、その回りの蒸気流の速度関係の説明図、
第３図は第２図の動翼断面形状と、各種パラメータの説
明図、第４図は加速率ｆと翼形損失この関係説明図、第
５図は動翼における加速率ｆと翼形損失この翼長方向分
布図、第６図は本考案のタービン動翼の実施例の動翼出
口角の翼長方向分布説明図、第７図は本考案のタービン
翼の実施例の翼先端部の翼形の蒸気の速度関係説明図、
第８図は第７図のタービン動翼を適用したタービンの子
午断面と動翼出口の速度分布説明図、第９図は第７図の
タービン動翼に吹き付ける蒸気状態の説明図、第１０図
は第８図の翼断面と蒸気の速度関係説明図である。１・・・タービン動翼、１ａ・・・動翼入口端、１ｂ・
・・動翼出口端、１′・・・本実施料例動翼、１“・・
・後段動翼、２・・・静翼、２″・・・後続段静翼、３
・・・ロータ、４・・・車室、５・・・蒸気流。昌■ １．Ａ−ＬＬ “　　１．０゛・、ＩFigure 1 is a meridional cross-sectional view of a conventional multi-section axial flow turbine, and Figure 2 is a cross-sectional view of the root, center, and tip of a conventional turbine rotor blade, and the velocity relationship of steam flow around them. An explanatory diagram of
Figure 3 is an explanatory diagram of the cross-sectional shape of the rotor blade in Figure 2 and various parameters, Figure 4 is an explanatory diagram of the relationship between acceleration rate f and airfoil loss, and Figure 5 is an illustration of acceleration rate f and airfoil loss in the rotor blade. This blade span direction distribution diagram, FIG. 6 is an explanatory diagram of the blade length direction distribution of the rotor blade exit angle of the embodiment of the turbine rotor blade of the present invention, and FIG. An explanatory diagram of the steam velocity relationship of airfoils,
Fig. 8 is an explanatory diagram of the meridional section of a turbine to which the turbine rotor blade of Fig. 7 is applied and the velocity distribution at the rotor blade outlet, Fig. 9 is an explanatory diagram of the state of steam blown onto the turbine rotor blade of Fig. 7, and Fig. 10 8 is an explanatory diagram of the relationship between the blade cross section and the steam velocity in FIG. 8. 1... Turbine moving blade, 1a... Moving blade inlet end, 1b.
... Moving blade outlet end, 1'... Moving blade of this example, 1"...
・Late stage rotor blade, 2...Stator blade, 2''...Subsequent stage stationary blade, 3
...rotor, 4...casing, 5...steam flow. Masa ■ 1. A-LL “1.0゛・,I

Claims

[Scope of utility model registration request]

In turbine rotor blades that are arranged on a rotary wheel disk of an axial flow turbine and constitute a blade row, the rotor blade outlet is defined by the angle that the arrow height line of the blade cross section makes with the rotating surface at the rotor blade outlet end. At each corner or in each cross-section of the rotor blade row, the function 5in-' (s /
A turbine rotor blade characterized in that the distribution of the outflow angle in the blade length direction defined by t) gradually decreases from the root of the blade to the center of the blade, and becomes constant or gradually increases from the center of the blade toward the tip of the blade.