JPS61173865U

JPS61173865U -

Info

Publication number: JPS61173865U
Application number: JP5753485U
Authority: JP
Priority date: 1985-04-19
Filing date: 1985-04-19
Publication date: 1986-10-29
Also published as: JPH037645Y2

Description

[Brief explanation of the drawing]

第１図は本考案一実施例の部分軸断面図、第２
図は第１図の―線拡大断面図、第３図は第１
図の矢視からの機内側シールリングの形状を示
す部分平面図、第４図は第３図の―線断面図
、第５図、第８図は機内側シールリングと回転軸
間の微少隙間の変化を示す説明図、（第５図は実
施例、第８図は従来技術）、第６図、第９図は機
内側シールリングのランド部の差圧変化を示す線
図（第６図は実施例、第９図は従来技術）、第７
図は従来の液封式軸封装置の部分軸断面図である
。主要部分の符号の説明、１……ケーシング、２
……回転軸、３……空間室、４，４′……機内側
シールリング、４ａ……縁部、５……機外側シー
ルリング、６……間隙、７……高圧室、８……低
圧室、９，１０……微少隙間、１１……供給口、
１２，１３……流出口、１４……円周溝、１５…
…ら線溝、１６，１７……シールランド、１８…
…切欠き溝。 Fig. 1 is a partial axial sectional view of one embodiment of the present invention;
The figure is an enlarged sectional view taken along the line - in Figure 1, and Figure 3 is an enlarged cross-sectional view of Figure 1.
A partial plan view showing the shape of the inside seal ring as viewed from the arrow in the figure, Figure 4 is a cross-sectional view taken along the line - - in Figure 3, and Figures 5 and 8 show minute gaps between the inside seal ring and the rotating shaft. (Fig. 5 is an example, Fig. 8 is a conventional technique), Figs. 6 and 9 are diagrams showing changes in differential pressure at the land portion of the inboard seal ring (Fig. 6). (Example, FIG. 9 shows prior art), 7th
The figure is a partial axial sectional view of a conventional liquid seal type shaft sealing device. Explanation of symbols of main parts, 1...Casing, 2
...Rotating shaft, 3...Space chamber, 4, 4'...Seal ring inside the machine, 4a...Edge, 5...Seal ring outside the machine, 6...Gap, 7...High pressure chamber, 8... Low pressure chamber, 9, 10...minor gap, 11...supply port,
12, 13... Outlet, 14... Circumferential groove, 15...
...Round groove, 16, 17...Seal land, 18...
...Notch groove.

Claims

[Scope of utility model registration request]

In the annular space formed between the casing and the rotating shaft inserted into the casing and into which the shaft sealing liquid is introduced, seal rings on the inside and outside of the machine are interposed facing each other with an appropriate gap between them, and the seal rings are also interposed with the casing. In a liquid seal type shaft seal device formed to prevent gas flow between the two chambers by flowing shaft sealing liquid into a high pressure chamber and a low pressure chamber formed between the rotating shafts through the seal ring, A cutout groove or the like is provided on the outer periphery of the inner seal ring on the high pressure chamber side, and the groove is formed to have low rigidity. A hydraulic shaft sealing device, characterized in that a groove and a spiral groove communicating with the circumferential groove and the gap between the seal ring are carved.