JPH0371195U

JPH0371195U -

Info

Publication number: JPH0371195U
Application number: JP13285989U
Authority: JP
Priority date: 1989-11-15
Filing date: 1989-11-15
Publication date: 1991-07-18

Description

[Brief explanation of drawings]

第１図及び第２図は本考案の一実施例を示すも
ので、第１図は縦型遠心ポンプの縦断面図、第２
図は第１図の−断面図、第３図及び第４図は
それぞれ軸封装置の他の実施例を示す要部の縦断
面図、第５図乃至第７図はそれぞれシール面の他
の実施例を示す正面図である。１……縦型遠心ポンプ、２……ケーシング、３
……吸入口、４……吐出口、５……インペラー、
５ａ……主羽根、５ｂ……シール羽根、６……送
液室、７……空気室、９……回転軸、１０，１１
……仕切壁、１３……シール部材、１４……回転
シール部材、１５……リング状溝付シール面、１
５ａ……環状溝、１５ｂ……放射溝。 Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a vertical cross-sectional view of a vertical centrifugal pump, Figure 2 being a longitudinal cross-sectional view of a vertical centrifugal pump;
The figure is a sectional view of FIG. 1, FIGS. 3 and 4 are longitudinal sectional views of main parts showing other embodiments of the shaft sealing device, and FIGS. It is a front view showing an example. 1... Vertical centrifugal pump, 2... Casing, 3
...Suction port, 4...Discharge port, 5...Impeller,
5a... Main blade, 5b... Seal blade, 6... Liquid feeding chamber, 7... Air chamber, 9... Rotating shaft, 10, 11
... Partition wall, 13 ... Seal member, 14 ... Rotating seal member, 15 ... Ring-shaped grooved sealing surface, 1
5a... annular groove, 15b... radial groove.

Claims

[Scope of utility model registration request]

An impeller having a main blade on the bottom surface and a seal blade on the top surface is fixed to the lower end of a rotating shaft provided vertically in the casing, and the impeller is disposed in a liquid feeding chamber at the bottom of the casing, In a shaft sealing device for a vertical centrifugal pump that forms an air chamber above the liquid feeding chamber and seals the rotating shaft above the air chamber, the rotating shaft is surrounded by an upper partition wall of the air chamber. , a seal member having an annular sealing surface is provided on the upper surface thereof, and a rotary seal member that rotates together with the rotary shaft is attached to the rotary shaft in a manner that corresponds to the seal member of the upper partition wall and is airtight with the rotary shaft. A shaft sealing device for a vertical centrifugal pump, characterized in that the rotary seal member is movable in the axial direction of a rotating shaft, and a sealing groove is formed in a sliding sealing surface of the rotary sealing member.