JPH0411201U

JPH0411201U -

Info

Publication number: JPH0411201U
Application number: JP5030890U
Authority: JP
Priority date: 1990-05-16
Filing date: 1990-05-16
Publication date: 1992-01-30

Description

[Brief explanation of the drawing]

第１図は本考案による蒸気タービンノズル板の
内部漏洩防止装置を備えている該ノズル板周辺の
構造を示す断面図、第２図は本考案装置の上半部
分を示す正面図、第３図は第２図の−線断面
図、第４図は第２図の−線拡大断面図、第５
図は第２図のＶ−Ｖ線拡大矢視図、第６図は蒸気
タービンノズル板周辺の従来構造を示す断面図で
ある。１……蒸気室、３，３……ボルト、４……ノズ
ル板、５……ノズル羽根、６，６’……外板、６
ａ……外板の側面、７……内板、８，９……回転
羽根、１０……固定羽根、１１……タービン翼車
、１２……翼環、１２ａ……翼環の側面、１３…
…溝部、１４……ピン、１５……タービン翼車、
１６……シールフイン、１７……穴、２１……漏
洩防止装置、２２……円周溝、２３……シールリ
ング、２４……板ばね、２５……ピン、２６……
押え小ねじ。 Fig. 1 is a sectional view showing the structure around the steam turbine nozzle plate equipped with an internal leakage prevention device according to the present invention, Fig. 2 is a front view showing the upper half of the device of the present invention, and Fig. 3 is a sectional view taken along the - line in Fig. 2, Fig. 4 is an enlarged sectional view taken along - line in Fig. 2, and Fig. 5 is an enlarged sectional view taken along the - line in Fig. 2.
The figure is an enlarged view along the line V-V in FIG. 2, and FIG. 6 is a sectional view showing the conventional structure around the steam turbine nozzle plate. 1... Steam chamber, 3, 3... Bolt, 4... Nozzle plate, 5... Nozzle vane, 6, 6'... Outer plate, 6
a...Side surface of outer plate, 7...Inner plate, 8, 9...Rotating blade, 10...Fixed blade, 11...Turbine wheel, 12...Blade ring, 12a...Side surface of blade ring, 13 …
...Groove, 14...Pin, 15...Turbine wheel,
16... Seal fin, 17... Hole, 21... Leak prevention device, 22... Circumferential groove, 23... Seal ring, 24... Leaf spring, 25... Pin, 26...
Presser foot machine screw.

Claims

[Scope of utility model registration request]

A circumferential groove is cut into the outer plate of the steam turbine nozzle plate facing the side surface of the blade ring, a plurality of seal rings are inserted into the circumferential groove, and each of these seal rings is pressed to seal the end face. 1. An internal leakage prevention device for a steam turbine nozzle plate, characterized in that the device comprises a plurality of leaf springs brought into contact with side surfaces of the blade ring, respectively.