JPS5881301U

JPS5881301U - Steam turbine cooling system

Info

Publication number: JPS5881301U
Application number: JP17820181U
Authority: JP
Inventors: 加納　幸実; 原田　稔之
Original assignee: 株式会社東芝
Priority date: 1981-11-30
Filing date: 1981-11-30
Publication date: 1983-06-02

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ＡはＸｍａｓ　　Ｔｒｅｅ型、Ｂは鞍型の羽根植
込部の側面図、第２図は従来の高中圧対向流型タービン
の中間グランド部付近の縦断面図、第′３図は従来の複
流再熱（中圧）タービン中央部付近の縦断面図、第４図
は第３図のタービンにおいて蒸気主流から高温状態を吸
込んだ場合を示す縦断面図、第５図は本考案による蒸気
タービンの冷却装置を第２図のタービンに適用した一実
施例を示す縦断面図、第６図は本考案による蒸気タービ
ンの冷却装置を第３図のタービンに適用した場合の実施
例を示す縦断面図、第７図は冷却蒸気の流れを示すシー
ケンス図である。１・・・羽根植込部、１ａ・・・バランスホール、２・
・・ロータ、４・・・主蒸気、５・・・再熱蒸気、７・
・・中間グランド、８・８ａ・１１・１３・１５・・・
漏洩蒸気、１６・・・ダイヤフラム内輪、Ｔ１・・・主
蒸気温度、ＴＲ・・・再熱蒸気温度、Ｐ□・・・主蒸気
圧力、ＴＲ・・・再熱蒸気温度、ＰＥ・・・中間グラン
ド出口圧。Figure 1A is a side view of the Xmas Tree type blade, B is a side view of the saddle type blade implantation part, Figure 2 is a vertical cross-sectional view of the vicinity of the intermediate gland of a conventional high and medium pressure counterflow type turbine, and Figure '3 is a conventional Fig. 4 is a longitudinal cross-sectional view of the vicinity of the center of the double-flow reheat (medium pressure) turbine of Fig. 3; FIG. 6 is a vertical cross-sectional view showing an embodiment in which the turbine cooling device is applied to the turbine shown in FIG. 2, and FIG. 6 is a longitudinal cross-sectional view showing an example in which the steam turbine cooling device according to the present invention is applied to the turbine shown in FIG. 3. The top view and FIG. 7 are sequence diagrams showing the flow of cooling steam. 1...Blade implantation part, 1a...Balance hole, 2.
...Rotor, 4...Main steam, 5...Reheat steam, 7.
・Intermediate ground, 8/8a/11/13/15...
Leakage steam, 16...Diaphragm inner ring, T1...Main steam temperature, TR...Reheat steam temperature, P□...Main steam pressure, TR...Reheat steam temperature, PE...Intermediate Gland outlet pressure.

Claims

[Claims for Utility Model Registration] 1. Steam extracted from an intermediate stage of a high-pressure turbine or an adjacent plant flows into the intermediate gland of a high-medium pressure counterflow turbine or the first stage of a reheat turbine while controlling the pressure and flow rate to an appropriate level. A cooling device for a steam turbine, characterized in that a blade embedded portion, a rotor, and an inner ring of a diaphragm are arranged as a cooler. 2 Introducing auxiliary steam to the first stage of the reheat turbine of the double-flow reheat turbine, and controlling the steam extracted from the middle stage of the high-pressure turbine or the adjacent plant to an appropriate pressure and flow rate, and flowing it into the upstream side of the diaphragm inner ring of each stage. 2. A cooling device for a steam turbine according to claim 1, characterized in that the blade mounting portion/mouth, the inner ring of the diaphragm, and the inner ring of the diaphragm are cooled.