US 5,246,336 AGranted

Motor driven complex pump apparatus

AssigneeFuji Electric Co., Ltd.

InventorChisiro Furukawa

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Abstract

An electric motor includes a pump leg on the driving side thereof, and a bracket, a flange, discharge joints, extension tubes and a volute chamber cover are integrated into the pump leg 6. The extension tubes are arranged opposite to each other at the positions spaced away from each other by an angle of about 180 degrees in the circumferential direction. A volute chamber of a first pump and a volute chamber of a second pump are formed integral with a distance suction casing fixedly secured to the lower surface of the pump leg while a suction port for the first pump is located opposite to a suction port of the second pump. In addition, a volute chamber cover is fixedly secured to the lower surface of the distance suction casing. The volute chamber is communicated directly with the extension tube, while the volute chamber is communicated with the extension tube via an intermediate discharge port which is formed integral with the distance suction casing while extending in the axial direction in the region located sideward of the volute chamber.

Claims12

Dependent claims

A motor driven complex pump apparatus comprising:

an electric motor for driving a driving shaft, said driving shaft extending in a substantially vertical direction;
a pump leg member having upper and lower sides, the upper side of said pump leg member supporting said motor and the lower side thereof defining a first part of a volute chamber of a first pump, said driving shaft extending through the pump leg member;
first casing means arranged below said pump leg member, said first casing means defining a second part of the volute chamber of said first pump;
second casing means arranged below said first casing means, said second casing means defining a volute chamber of a second pump, said first casing means and an upper side of said second casing means constituting a distance suction casing, said distance suction casing comprising
a first horizontal wall having a suction port for said first pump formed therein;
a second horizontal wall having a suction port for said second pump formed therein, said second horizontal wall extending substantially in parallel with and being a predetermined distance apart from said first horizontal wall;
and
an intermediate discharge port communicated with a discharge port of said second pump, said intermediate discharge port extending in the substantially vertical direction in the region located at the side of said first horizontal wall and said second horizontal wall;
and
first and second impellers fixedly mounted on said driving shaft, said first impeller being received in said first casing means and said second impeller being received in said second casing means.

7 more elements

A motor driven complex pump apparatus comprising:

an electric motor for driving a driving shaft, said driving shaft extending in a substantially vertical direction;
a pump leg member having upper and lower sides, the upper side of said pump leg member supporting said motor and the lower side thereof defining a first part of a volute chamber of a first pump, said driving shaft extending through the pump leg member;
first casing means arranged below said pump leg member, said first casing means defining a second part of the volute chamber of said first pump;
second casing means arranged below said first casing means, said second casing means defining a volute chamber of a second pump, the first casing means and an upper side of the second casing means constituting a common casing, said common casing comprising:
a horizontal partition disposed between said first pump and said second pump, said horizontal partition preventing fluid communication between said first and said second pumps;
and
an intermediate discharge port communicated with a discharge port of said second pump, said intermediate discharge port extending in the substantially vertical direction in the region located radially outward of both said horizontal partition and said volute chamber of said first pump;
and
first and second impellers fixedly mounted on said driving shaft, said first impeller being received in said first casing means and said second impeller being received in said second casing means.

6 more elements

Dependencies are inferred from the claim text.