JPS59160801U

JPS59160801U - axial steam turbine

Info

Publication number: JPS59160801U
Application number: JP5644083U
Authority: JP
Inventors: 長尾　進一郎
Original assignee: 株式会社東芝
Priority date: 1983-04-15
Filing date: 1983-04-15
Publication date: 1984-10-27

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図および第２図はそれぞれ従来の軸流蒸気タービン
の一部を示す縦断面図、第３図は動翼から瘤散する水滴
の速度を示す線図、第４図は動翼から飛散する水滴の流
れを示す概略図、第５図および第６図はそれぞれ第１図
および第２図に示す軸流蒸気タービンにおける水滴の流
れを示す縦断面図、第７図、第１０図、第１１図および
第１２図はそれぞれ本考案の一実施例を示す縦断面図、
第８図は第７図に示す軸流蒸気タービンにおける水滴の
流れを示す縦断面図、第９図は動翼と吸込溝との軸方向
距離による水分除去率の変化を示す関係図である。１・・・ケーシング、２・・・外輪、３・・・内輪、４
・・・ノズル翼、５・・・ノズル、６・・・動ｊｌ、７
．１１・・・溝、８・・・外部空間、９．１７・・・連
通孔、１０・・・段落用　　　　　・口側空間、１２・
・・内周面、１３．１４・・・蒸気下流側端縁、１５・
・・案内輪、１６・・・吸込溝、１８・・・吸込空間。躬７図＼　　　゛Figures 1 and 2 are longitudinal cross-sectional views showing part of a conventional axial steam turbine, Figure 3 is a diagram showing the velocity of water droplets scattering from the rotor blades, and Figure 4 is a diagram showing the speed of water droplets scattering from the rotor blades. 5 and 6 are longitudinal sectional views showing the flow of water droplets in the axial steam turbine shown in FIGS. 1 and 2, respectively. FIG. 11 and FIG. 12 are longitudinal cross-sectional views showing an embodiment of the present invention, respectively;
FIG. 8 is a longitudinal cross-sectional view showing the flow of water droplets in the axial steam turbine shown in FIG. 7, and FIG. 9 is a relationship diagram showing changes in the water removal rate depending on the axial distance between the rotor blade and the suction groove. 1...Casing, 2...Outer ring, 3...Inner ring, 4
... Nozzle blade, 5... Nozzle, 6... Motion jl, 7
．． 11... Groove, 8... External space, 9.17... Communication hole, 10... Paragraph/mouth side space, 12.
...Inner peripheral surface, 13.14...Steam downstream edge, 15.
...Guide wheel, 16...Suction groove, 18...Suction space. Figure 7＼゛

Claims

[Claims for Utility Model Registration] 1. In an axial steam turbine having a nozzle fixed to the inner circumferential surface of a casing and rotor blades provided adjacent to the steam downstream side of the nozzle, the nozzle blade of the nozzle An axial flow steam turbine characterized in that a water removal passage communicating with a low pressure space outside the steam flow path is provided near the upstream side of the steam flow path. 2. A utility model characterized in that the water removal passage is formed by a groove continuously provided in the circumferential direction on the inner peripheral surface of the outer ring of the nozzle, and a communication hole communicating the groove with the low pressure space. An axial flow steam turbine according to claim 1. 3. The water volume removal passage is formed by a groove formed by a gap between the outer ring of the nozzle and a guide ring arranged on the steam upstream side of the outer ring, and a communication hole that communicates this groove with the low pressure space. An axial flow steam turbine according to claim 1, characterized in that the axial flow steam turbine has the following structure.