Constant speed vertical pump with aeration

Details Constant speed vertical pump with aeration Constant speed vertical pump with aeration

1990-10-24

1991-12-24

Look, Edward K.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Responsive to liquid level or weight

417 36, 417 90, F04B 1100, F04B 3900, F04B 4900

Patent

active

050747460

ABSTRACT:
According to the vertical pump of the present invention, a reverse U-shape air suction passage is connected to a suction casing which communicates with the impeller chamber, and a U-shape branch passage is branched from a hanging portion of the air suction passage. According to this vertical pump, when the water level is raised in the air operation state, air suction into the suction casing through the air suction passage and the branch passage is stopped when the water level reaches the pumping starting water level, so that the operation of the vertical pump may be changed to the water pumping operation. Where the water level is lowered in the state of water pumping operation, air suction into the suction casing through the branch passage and the air suction passage may start at the pumping stopping water level which is lower than the pumping starting water level. Accordingly, the operation of the vertical pump may be changed to the air operation. The provision of the air suction passage and the branch passage enables the vertical pump to carry out the full-speed operation at all times.

REFERENCES:
patent: 1474086 (1923-11-01), Poebing
patent: 1785480 (1930-12-01), Durdin, Jr.
patent: 2510190 (1950-06-01), Nicolette
patent: 3324803 (1967-06-01), Kelley et al.
patent: 4204801 (1980-05-01), Kamo
patent: 4781529 (1988-11-01), Rose

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