JPS6256791U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す液封ポンプの
側断面図、第２図は第１図の要部拡大断面図、第
３図は従来の液封ポンプの下半部の要部側断面図
である。 １……ポンプ軸、２……１段目羽根車、３……
２段目羽根車、６，７……ポートシリンダ、１４
……１段目ケーシング、１４……２段目ケーシン
グ、１８……隔壁、２０……中間ブツシユ、２０
ａ……自己封水通路。 Fig. 1 is a side sectional view of a liquid ring pump showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, and Fig. 3 is a main part of the lower half of a conventional liquid ring pump. FIG. 1...Pump shaft, 2...1st stage impeller, 3...
2nd stage impeller, 6, 7...Port cylinder, 14
...First stage casing, 14... Second stage casing, 18... Partition wall, 20... Intermediate bushing, 20
a...Self-sealing passage.

Claims (1)

【実用新案登録請求の範囲】 １ ポンプ軸上に２個の羽根車を取付けた２段式
液封ポンプにおいて、内部に封水通路を有する中
間ブツシユを、段間隔壁の軸貫通部に挿入し、１
段目のケーシングと２段目のケーシングの圧力差
を維持させるようにしたことを特徴とする液封ポ
ンプ。 ２ 上記中間ブツシユは、弾性体から構成されて
いる実用新案登録請求の範囲第１項記載の液封ポ
ンプ。 ３ 前記中間ブツシユの封水通路には、ケーシン
グ内の液膜正圧部より分岐して隔壁に設けられた
通路を経て、運転時ケーシング内に形成される液
膜の圧力水が供給される実用新案登録請求の範囲
第１項記載の液封ポンプ。[Claims for Utility Model Registration] 1. In a two-stage liquid ring pump with two impellers mounted on the pump shaft, an intermediate bushing having a water-sealing passage inside is inserted into the shaft penetrating portion of the stage spacer. ,1
A liquid ring pump characterized in that a pressure difference between a casing in the first stage and a casing in the second stage is maintained. 2. The liquid ring pump according to claim 1, wherein the intermediate bushing is made of an elastic body. 3 In practical use, the water sealing passage of the intermediate bushing is supplied with pressure water of a liquid film formed in the casing during operation through a passage provided in the partition wall branching from the liquid film positive pressure part in the casing. A liquid ring pump according to claim 1 of the patent registration claim.