JPH02118102U - - Google Patents

Description

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

第１図は本考案による軸流タービン動翼の一例
を示すタービンの要部縦断面図、第２図はその異
なる翼断面形状を示すとともに、極低負荷運転時
の作用を説明するための図、第３図は本考案によ
る設計流入角の翼高さ分布の一例を示す図、第４
図は定格負荷運転時の作用を説明するための図、
第５図は従来例を示すタービンの要部縦断面図、
第６図は従来の翼断面形状を示すとともに、極低
負荷運転時の作用を説明するための図である。 １，１′……動翼、１ａ……翼根元（高さＨａ
）、１ｂ……翼先端（高さＨｂ）、１ｃ……翼先
端近くの適当な翼高さ方向位置（高さＨｃ）、２
……静翼、３……蒸気流れ、３′……流入蒸気、
４……逆流域、５，５′……剥離流れ域。 Fig. 1 is a vertical cross-sectional view of a main part of a turbine showing an example of an axial flow turbine rotor blade according to the present invention, and Fig. 2 is a diagram showing different cross-sectional shapes of the blade and explaining the action during extremely low load operation. , Fig. 3 is a diagram showing an example of the blade height distribution of the design inflow angle according to the present invention, Fig. 4
The figure is a diagram to explain the action during rated load operation.
FIG. 5 is a longitudinal sectional view of the main part of a turbine showing a conventional example;
FIG. 6 shows the cross-sectional shape of a conventional blade and is a diagram for explaining the action during extremely low load operation. 1, 1'... Moving blade, 1a... Blade root (height Ha
), 1b...Blade tip (height Hb), 1c...Appropriate blade height direction position near the wing tip (height Hc), 2
... Stationary blade, 3 ... Steam flow, 3' ... Incoming steam,
4... Reverse region, 5,5'... Separated flow region.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 軸流タービンの動翼において、全翼ともその翼根
元から翼先端近くの適当な翼高さ方向位置までは
、同一翼高さ方向位置における翼断面形状がそれ
ぞれ同一であるが、この適当な翼高さ位置から翼
先端までは、同一翼高さ方向位置における翼断面
形状がそれぞれ相異なる複数個の翼ごとに全翼を
区分したことを特徴とする軸流タービン動翼。In the rotor blades of an axial flow turbine, all blades have the same blade cross-sectional shape at the same blade height direction position from the blade root to an appropriate blade height direction position near the blade tip. An axial flow turbine rotor blade characterized in that the entire blade is divided into a plurality of blades each having a different blade cross-sectional shape at the same blade height direction position from the height position to the blade tip.