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Patent Searching and Data


Title:
FLOW CONTROLLING METHOD FOR PUMP
Document Type and Number:
Japanese Patent JP3670780
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To establish a control method which can simplify the controlling system, accomplish a high reliability of the control, and permits reduction of the designing and manufacturing costs.
SOLUTION: At the outlet, a pump 1 is equipped with an outlet valve 3 and a pressure compensated flow control valve 2, which are connected parallel with each other, and the revolving speed of the pump 1 is subjected at all times to a proportional integral control 14 based upon the deviation of the actual rate of flow 5 from the set value 6. When the set value 6 is in the low flow range, the outlet valve 3 is opened fully, and the opening of the pressure compensated flow control valve 2 is controlled by a function generator 17-when the set value 6 lies in the high rate range, both the outlet valve 3 and adjusting valve 2 are full opened.


Inventors:
Misawa, Kazuyuki
Application Number:
JP1996000323964
Publication Date:
April 22, 2005
Filing Date:
December 04, 1996
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F04B49/06; F04D15/00; F22D5/18; G05D7/06; (IPC1-7): F04B49/06; F04D15/00; F22D5/18; G05D7/06