JPS61138872U

JPS61138872U -

Info

Publication number: JPS61138872U
Application number: JP1985021853U
Authority: JP
Priority date: 1985-02-20
Filing date: 1985-02-20
Publication date: 1986-08-28

Description

[Brief explanation of the drawing]

第１図ａは本考案の一実施例に係るクロスフロ
ー水車のランナの構造を表わす部分側面図、第１
図ｂは第１図ａ中Ａ―Ａ矢視断面図、第２図はＳ
Ｓ４１とＳＵＳ３１６ＬＮのキヤビテーシヨン・
エロージヨンによる重量減少量を時間の関係で表
わすグラフ、第３図はクロスフロー水車の代表的
な構造を表わす一部破断斜視図、第４図は第３図
に示したクロスフロー水車における水流を説明す
る概念図、第５図はキヤビテーシヨン・エロージ
ヨンが生じた従来のランナブレードの表面状態を
表わす外観写真、第６図は第５図に示したランナ
ブレードの断面の金属組織を表わす顕微鏡写真で
ある。図面中、３は回転軸、６はケーシング、２１は
ランナ、２２は支持板、２３はランナブレードで
ある。 FIG. 1a is a partial side view showing the structure of a runner of a cross-flow turbine according to an embodiment of the present invention;
Figure b is a cross-sectional view taken along arrow A-A in Figure 1 a, and Figure 2 is S.
Cavitation of S41 and SUS316LN
A graph showing the amount of weight loss due to erosion as a function of time. Figure 3 is a partially cutaway perspective view showing the typical structure of a cross-flow turbine. Figure 4 explains the water flow in the cross-flow turbine shown in Figure 3. FIG. 5 is an external photograph showing the surface condition of a conventional runner blade where cavitation/erosion has occurred, and FIG. 6 is a microscopic photograph showing the metal structure of the cross section of the runner blade shown in FIG. In the drawings, 3 is a rotating shaft, 6 is a casing, 21 is a runner, 22 is a support plate, and 23 is a runner blade.

補正昭６０．６．１９図面の簡単な説明を次のように補正する。明細書の第１３ページ７行目から同ページ８行
目にかけて記載の「ランナブレードの表面状態」
を「ランナブレード表面の金属組織」と補正する
。Amendment June 19, 1980 The brief description of the drawing is amended as follows. "Surface condition of runner blade" described from line 7 on page 13 to line 8 on the same page of the specification
is corrected as "metallic structure of the runner blade surface".

Claims

[Scope of utility model registration request]

A water turbine runner in which a plurality of runner blades are arranged in a cylindrical shape between support plates, a rotating shaft is provided on the supporting plate, and the rotating shaft is also supported by a water turbine casing, the C content being 0.030 wt% or less, Si is 1.00wt% or less, Mn is 2.00wt% or less, P is 0.045wt% or less, S is 0.030w
t% or less, Ni is 10.50 to 14.50wt%
, Cr is 16.50 to 18.50 wt%, Mo is 2.00 to 3.00 wt%, and N is 0.12 to 0.
A runner for a water turbine, wherein the runner blade and the support plate are made of austenitic low carbon stainless steel each containing 22 wt%.