JPH01162097U

JPH01162097U -

Info

Publication number: JPH01162097U
Application number: JP5963788U
Authority: JP
Priority date: 1988-05-02
Filing date: 1988-05-02
Publication date: 1989-11-10

Description

[Brief explanation of the drawing]

第１図は本考案の実施例における縦断面図、第
２図は第１図のＹ―Ｙ横断面図、第３図は第１図
Ｘ―Ｘ横断平面図、第４図はＰ―Ｐ横断平面図、
第５図は他の実施例の構造を示す縦断正面図、第
６図は従来例の構造を示す縦断正面図。１……モータフレーム、３……モータ軸、４…
…インペラ軸、５……円筒状連結部、８……下部
インペラ、９……上部インペラ、１２……ポンプ
ケーシング、１３……上部ケーシング、１４……
中間ケーシング、１５……下部ケーシング、１７
……ポンプ吸込口、１８……ポンプ吐出口、１９
……下部インペラ用吸込口、２０……上部インペ
ラ用吐出渦巻室、２１……下部インペラ用吐出渦
巻室、２２……上部インペラ用吸込室、２３……
第２流体通路、２４……第１流体通路、２７……
下部インペラ用渦巻状案内壁、３０……上部イン
ペラ用渦巻状案内壁、３３……吐出集合室、３９
……インペラ軸、４１……底軸受、４２……球軸
受、４８……スペーサリング。 Fig. 1 is a vertical sectional view of an embodiment of the present invention, Fig. 2 is a YY cross-sectional view of Fig. 1, Fig. 3 is a cross-sectional plan view of Fig. 1 XX, and Fig. 4 is a P-P cross-sectional plan,
FIG. 5 is a longitudinal sectional front view showing the structure of another embodiment, and FIG. 6 is a longitudinal sectional front view showing the structure of a conventional example. 1...Motor frame, 3...Motor shaft, 4...
... Impeller shaft, 5 ... Cylindrical connection part, 8 ... Lower impeller, 9 ... Upper impeller, 12 ... Pump casing, 13 ... Upper casing, 14 ...
Middle casing, 15...Lower casing, 17
... Pump suction port, 18 ... Pump discharge port, 19
...Suction port for lower impeller, 20...Discharge volute chamber for upper impeller, 21...Discharge volute chamber for lower impeller, 22...Suction chamber for upper impeller, 23...
Second fluid passage, 24... First fluid passage, 27...
Spiral guide wall for lower impeller, 30... Spiral guide wall for upper impeller, 33... Discharge collection chamber, 39
... Impeller shaft, 41 ... Bottom bearing, 42 ... Ball bearing, 48 ... Spacer ring.

Claims

[Scope of utility model registration request]

The upper impeller and the lower impeller are attached to the lower part of the impeller shaft installed vertically in the center of the pump, and the upper casing, which forms the suction chamber for the upper impeller, is attached to the upper impeller that houses the upper impeller so as to cover the upper part of the upper impeller. a second fluid passage that guides fluid from the lower impeller discharge volute chamber and the upper impeller discharge volute chamber that accommodate the lower impeller to the pump discharge port, and from the lower impeller discharge volute chamber to the upper impeller suction chamber. An intermediate casing in which a first fluid passage for guiding fluid is formed is joined to the lower impeller, and a lower impeller suction chamber, a pump suction port communicating with the suction chamber, and a pump discharge port are formed so as to cover the lower part of the lower impeller. A vertical two-stage centrifugal pump characterized in that a casing is combined with the intermediate casing.