JPS6056863U

JPS6056863U - Labyrinth seal device for rotating machinery

Info

Publication number: JPS6056863U
Application number: JP14936683U
Authority: JP
Inventors: 博神吉
Original assignee: 三菱重工業株式会社
Priority date: 1983-09-27
Filing date: 1983-09-27
Publication date: 1985-04-20
Also published as: JPS6316938Y2

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図はタービンおよび同タービンにおけるラビリンス
シールの使用例を示す縦断面図、第２図はコンプレッサ
および同コンプレッサにおけるラビリンスシールの使用
例を示す縦断面図、第３図は第１図の■−■矢視図、第
４図は第１図の６部にバッフルを設けた従来例を示す断
面図で、第５〜８図は第１図に示したタービンの６部に
用いられた本考案の一実施例としての回転機械用ラビリ
ンスシール装置を示すもので、第５図はその縦断面図、
第６図は第５図のＶｌ−ＶＩ矢視図、第７図は第５図の
■−■矢視図、第８図はもれ流体の周方向速度成分と励
振力との関係を示すグラフである。３・・・動翼、４・・・円板、１０・・・高圧部、１１
・・・低圧部、１６・・・シュラウド、１７・・・シー
ル天井、１８・・・ノズル孔、１９ａ、１９ｂ、１９ｃ
、１９ｄ・・・シールフィン、２０・・・第１シール室
。Fig. 1 is a longitudinal sectional view showing a turbine and an example of how a labyrinth seal is used in the turbine, Fig. 2 is a longitudinal sectional view showing a compressor and an example of how a labyrinth seal is used in the compressor, and Fig. 3 is a - ■The arrow view and Figure 4 are cross-sectional views showing a conventional example in which a baffle is provided in the 6th part of the turbine shown in Figure 1, and Figures 5 to 8 are the present invention used in the 6th part of the turbine shown in Figure 1. This shows a labyrinth seal device for a rotating machine as an example, and FIG. 5 is a longitudinal sectional view thereof;
Fig. 6 is a view taken from the Vl-VI arrow in Fig. 5, Fig. 7 is a view taken from the ■-■ arrow of Fig. 5, and Fig. 8 shows the relationship between the circumferential velocity component of the leaked fluid and the excitation force. It is a graph. 3... Moving blade, 4... Disc, 10... High pressure part, 11
...Low pressure part, 16...Shroud, 17...Seal ceiling, 18...Nozzle hole, 19a, 19b, 19c
, 19d... Seal fin, 20... First seal chamber.

Claims

[Scope of utility model registration request]

In order to prevent fluid leakage from high-pressure parts to low-pressure parts along the rotating shaft of rotating machinery, a labyrinth seal consisting of multiple seal fins is provided between the circumferential surface of the rotating shaft and a nearby stationary part. , a nozzle hole for spouting fluid guided from the high pressure section into the seal chamber between adjacent seal fins of the same Virisys seal is provided in the stationary section, and the jetting direction of the nozzle hole is aligned with the rotating shaft. A labyrinth seal device for rotating machinery characterized by being formed in the opposite direction to the rotation direction.