JPH01113101U

JPH01113101U -

Info

Publication number: JPH01113101U
Application number: JP809788U
Authority: JP
Priority date: 1988-01-27
Filing date: 1988-01-27
Publication date: 1989-07-31

Description

[Brief explanation of the drawing]

第１図は本考案による蒸気タービンの車室構造
の一例を示す要部縦断面図、第２図は従来の蒸気
タービンの車室構造を示す要部縦断面図、第３図
はその全体構造断面図、第４図はその他の従来例
を示す要部縦断面図、第５図はその全体構造断面
図である。４０……ロータ、４４……中圧段落入口部、４
６……中圧ダミー部、４７……冷却用蒸気導入通
路、４９……大径低圧ダミー部、５０……小径低
圧ダミー部、５２……高圧ダミー環、７１……低
圧ダミー環、７２……高圧排気流出用ポケツト、
１０５……高圧排気連絡配管、２１０……中圧蒸
気室。 Fig. 1 is a vertical cross-sectional view of a main part showing an example of the casing structure of a steam turbine according to the present invention, Fig. 2 is a longitudinal cross-sectional view of a main part showing a casing structure of a conventional steam turbine, and Fig. 3 is the overall structure. 4 is a vertical sectional view of a main part showing another conventional example, and FIG. 5 is a sectional view of its overall structure. 40...Rotor, 44...Intermediate pressure stage inlet section, 4
6... Medium pressure dummy part, 47... Cooling steam introduction passage, 49... Large diameter low pressure dummy part, 50... Small diameter low pressure dummy part, 52... High pressure dummy ring, 71... Low pressure dummy ring, 72... ...Pocket for high pressure exhaust outflow,
105... High pressure exhaust connection piping, 210... Medium pressure steam room.

補正昭６３．３．２８考案の名称を次のように補正する。考案の名称蒸気タービンの車室構造実用新案登録請求の範囲、図面の簡単な説明を
次のように補正する。Amendment: March 28, 1983: The name of the invention is amended as follows. Title of the invention: Steam turbine casing structure The claims for utility model registration and the brief description of the drawings are amended as follows.

【実用新案登録請求の範囲】蒸気タービン車室内ロータの中圧ダミー部径を
中圧入口部の径程度まで小径化し、かつ高圧ダミ
ー部を前記中圧入口部まで軸方向に延設したこと
を特徴とする蒸気タービンの車室構造。[Claims for Utility Model Registration] The diameter of the intermediate pressure dummy part of the steam turbine casing interior rotor is reduced to the diameter of the intermediate pressure inlet part, and the high pressure dummy part is extended in the axial direction to the intermediate pressure inlet part. Characteristic steam turbine casing structure.

【図面の簡単な説明】第１図は本考案による蒸気タービンの車室構造
の一例を示す要部縦断面図、第２図は従来の蒸気
タービンの車室構造を示す要部縦断面図、第３図
はその全体構造断面図、第４図はその他の従来例
を示す要部縦断面図、第５図はその全体構造断面
図である。４０……ロータ、４４……中圧入口部、４６…
…中圧ダミー部、４７……冷却用蒸気導入通路、
４９……大径低圧ダミー部、５０……小径低圧ダ
ミー部、５２……高圧ダミー環、７１……低圧ダ
ミー環、７２……高圧排気流出用ポケツト、１０
５……高圧排気連絡配管、２１０……中圧蒸気室
。[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a vertical sectional view of a main part showing an example of the casing structure of a steam turbine according to the present invention, FIG. 2 is a longitudinal sectional view of a main part showing a casing structure of a conventional steam turbine, FIG. 3 is a cross-sectional view of the entire structure, FIG. 4 is a longitudinal cross-sectional view of a main part showing another conventional example, and FIG. 5 is a cross-sectional view of the overall structure. 40...rotor, 44...medium pressure inlet section, 46...
...Intermediate pressure dummy part, 47...Cooling steam introduction passage,
49...Large diameter low pressure dummy part, 50...Small diameter low pressure dummy part, 52...High pressure dummy ring, 71...Low pressure dummy ring, 72...High pressure exhaust outflow pocket, 10
5... High pressure exhaust connection piping, 210... Medium pressure steam room.

Claims

[Scope of utility model registration request]

In the casing structure of a steam turbine having both high and intermediate pressure stages, the rotor diameter of the intermediate pressure dummy part consisting of a rotor corresponding to the intermediate pressure dummy ring that constitutes a part of the intermediate pressure steam chamber is reduced, and the rotor diameter of the intermediate pressure dummy part is reduced. Cooling steam is introduced to cool the intermediate-pressure stage inlet and the rotor in its vicinity through the gap between the end of the high-pressure dummy ring near the intermediate-pressure section and the intermediate-pressure dummy. A small-diameter low-pressure dummy part that forms a passage and has a diameter that corresponds to the intermediate-pressure dummy part and is at least larger than the rotor diameter is placed in the high-pressure part in terms of thrust balance, and has a diameter that is approximately equal to the average diameter of the intermediate-pressure stage. It is integrally provided on the high-pressure exhaust side of the large-diameter low-pressure dummy part to form a two-stage structure, and a high-pressure exhaust outflow pocket is provided around the inner periphery of the stepped part of the low-pressure dummy ring corresponding to the large-diameter and small-diameter low-pressure dummy parts. A casing structure for a steam turbine, characterized in that the pocket and the cooling steam introduction passage are connected by a high-pressure exhaust connection pipe, and an intermediate-pressure inner casing that covers the intermediate-pressure steam chamber is eliminated.