Pumps – Condition responsive control of pump drive motor – With control of pump drive transmission
Patent
1978-08-29
1981-10-20
Croyle, Carlton R.
Pumps
Condition responsive control of pump drive motor
With control of pump drive transmission
62228, 192 8718, F04B 4900, F16D 25063
Patent
active
042957923
ABSTRACT:
An apparatus for controlling the operation of a fluid pressure raising system having a motor and a centrifugal fluid machine adapted to be driven by the motor. The apparatus has an overdrive gear disposed between the motor, which is typically an electric motor suited for the commercially available electric power, and the centrifugal fluid machine. The overdrive gear consists of two gear trains or pairs having different overdrive ratios, each consisting of a gear and a pinion meshing with the gear, and a clutch adapted to selectively switch over the gear pair taking part in the torque transmission between the output shaft of the motor and the impeller shaft of the centrifugal fluid machine, from one gear pair to the other gear pair and vice versa. Thus, the overdrive gear can transmit the power of the motor to the impeller at two different overdrive ratios. The clutch is adapted to be actuated in response to a signal representative of an external condition of the fluid pressure raising system, which signal is delivered by a detector.
REFERENCES:
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patent: 2464538 (1949-03-01), Vanderzee
patent: 3155040 (1964-11-01), Shurts et al.
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patent: 3417845 (1968-12-01), Swanson
patent: 3455118 (1969-07-01), Petranek
patent: 4006603 (1977-02-01), Miles
Ishii Susumu
Kaneko Junichi
Nakayama Yoshihiko
Tachibana Keiji
Croyle Carlton R.
Hitachi , Ltd.
Look Edward
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