JPS59175605U

JPS59175605U - steam turbine nozzle diaphragm

Info

Publication number: JPS59175605U
Application number: JP6986483U
Authority: JP
Inventors: 八木沢　宏; 安藤　政訓
Original assignee: 株式会社東芝
Priority date: 1983-05-12
Filing date: 1983-05-12
Publication date: 1984-11-24

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はタービンの段落を示す断面図、第２図は従来の
蒸気タービンのノズルダイアフラムの正面図、第３図は
従来のノズルダイアフラムの斜視図、第４図は負荷時の
ノズルダイアフラムの変形を示す断面図、第５図は従来
のノズルダイアフラムの内輪内周側軸方向変形量の分布
を示す曲線図、第６図は本考案による蒸気タービンのノ
ズルダイアフラムの一実施例を示す正面図、第７図は第
６図のＩ−１線に沿う矢視断面図、第８図は内輪内周側
軸方向変形量の分布を示す曲線図、第９図は本考案の他
の実施例によるノズルダイアフラムの正面図である。５・・・・・・ノズルダイアフラム、６・・・・・・ノ
ズル翼、７・・・・・・内輪、７ａ・・・・・・半体（
内輪上半部）、７ｂ・・・・・・半体（内輪下半部）、
８・・・・・・外輪、９・・・・・・分割面（分割線）
、１３・・・・・・幅広溝、１４・・・・・・幅広キー
、Ａ・・・・・・内輪の蒸気入口側端面。ｔ／　　／ｓ。１　　／、　＼６ｉ。ｂ− ／−／′″７′ ｕFigure 1 is a sectional view showing a turbine stage, Figure 2 is a front view of a nozzle diaphragm of a conventional steam turbine, Figure 3 is a perspective view of a conventional nozzle diaphragm, and Figure 4 is deformation of the nozzle diaphragm under load. 5 is a curve diagram showing the distribution of axial deformation on the inner circumferential side of the inner ring of a conventional nozzle diaphragm, and FIG. 6 is a front view showing an embodiment of the nozzle diaphragm for a steam turbine according to the present invention. FIG. 7 is a sectional view taken along line I-1 in FIG. 6, FIG. 8 is a curve diagram showing the distribution of axial deformation on the inner circumferential side of the inner ring, and FIG. 9 is according to another embodiment of the present invention. It is a front view of a nozzle diaphragm. 5... Nozzle diaphragm, 6... Nozzle blade, 7... Inner ring, 7a... Half body (
upper half of the inner ring), 7b...half body (lower half of the inner ring),
8...Outer ring, 9...Dividing surface (dividing line)
, 13... wide groove, 14... wide key, A... steam inlet side end face of inner ring. t//s. 1/, \6i. b- /-/′″7′ u

Claims

[Scope of utility model registration request]

In a nozzle diaphragm of a steam turbine, which is composed of an inner ring, an outer ring, and a nozzle blade disposed between these two rings, and is divided into two halves, an upper and a lower half, along a center line, on the steam inlet side end face of the inner ring, A steam turbine characterized in that a wide groove spanning the upper and lower halves is provided along the dividing line, a wide key is fitted into the wide groove, and the key is fixed to either one of the upper and lower halves. nozzle diaphragm.