Pumps – Condition responsive control of pump drive motor – Plural pumps having separate drive motors – supply sources,...
Patent
1988-01-06
1989-02-28
Neils, Paul F.
Pumps
Condition responsive control of pump drive motor
Plural pumps having separate drive motors, supply sources,...
417 18, 417 45, 417 53, 417265, E04B 4106, E04B 4906, E04B 300
Patent
active
048080772
ABSTRACT:
Velocity control of two plungers provided in a pulsationless duplex plunger pump is effected by detecting pressure of a resultant discharge from the two plungers and positions of the plungers, and correcting sequentially a velocity instruction of the each plunger, based on pressure corresponding to the detected position of the each plunger so that the sum of velocities of the two plungers will be constant.
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Ishii Mieko
Kan Tsuneo
Nakamura Yozo
Hitachi , Ltd.
Neils Paul F.
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