JPS5596383A - Changer for number of operating pump - Google Patents
Changer for number of operating pumpInfo
- Publication number
- JPS5596383A JPS5596383A JP424179A JP424179A JPS5596383A JP S5596383 A JPS5596383 A JP S5596383A JP 424179 A JP424179 A JP 424179A JP 424179 A JP424179 A JP 424179A JP S5596383 A JPS5596383 A JP S5596383A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- revolving
- changing
- time
- discharge pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To perform smoothly changing the number of operating pump by procedure in which the revolving number of changed pump is gradually raised or reduced until the revolving number obtained by calculating the square root of discharge pressure coincides with the revolving number of regulator obtained by pressure regulator at the time of obtaining a command for changing the number of pump to be operated.
CONSTITUTION: To the pump number control circuit, the changing time revolving number decision circuit 11 by which the square root calculation of discharge pressure measured by the discharge pressure meter 8 is made and then the revolving number n1 at the time of addition or reduction of the pump Pa or Pb is determined by multiplying the calculated value by a proper coefficient and the additional revolving number control circuits 12a and 12b by which the revolving number is gradually increased or reduced from the number n1 obtained at the circuit 11 to the revolving number ne of the pressure regulator 9 are provided. Thus, at the time when the number of operating pumps is changed, the number of pump can be very smoothly changed without abruptly changing discharge pressure and discharge flow rate.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP424179A JPS5596383A (en) | 1979-01-18 | 1979-01-18 | Changer for number of operating pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP424179A JPS5596383A (en) | 1979-01-18 | 1979-01-18 | Changer for number of operating pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5596383A true JPS5596383A (en) | 1980-07-22 |
Family
ID=11579042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP424179A Pending JPS5596383A (en) | 1979-01-18 | 1979-01-18 | Changer for number of operating pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5596383A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6019989A (en) * | 1983-07-12 | 1985-02-01 | Kubota Ltd | Speed regulating method in variable speed pump |
JP2005344536A (en) * | 2004-06-01 | 2005-12-15 | Yaskawa Electric Corp | Control device and control method for pump parallel operation |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5248316U (en) * | 1975-10-03 | 1977-04-06 | ||
JPS545183A (en) * | 1977-06-15 | 1979-01-16 | Hitachi Ltd | Pump number controller |
-
1979
- 1979-01-18 JP JP424179A patent/JPS5596383A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5248316U (en) * | 1975-10-03 | 1977-04-06 | ||
JPS545183A (en) * | 1977-06-15 | 1979-01-16 | Hitachi Ltd | Pump number controller |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6019989A (en) * | 1983-07-12 | 1985-02-01 | Kubota Ltd | Speed regulating method in variable speed pump |
JP2005344536A (en) * | 2004-06-01 | 2005-12-15 | Yaskawa Electric Corp | Control device and control method for pump parallel operation |
JP4662120B2 (en) * | 2004-06-01 | 2011-03-30 | 株式会社安川電機 | Pump parallel operation control device and control method |
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