JPS5696188A - Apparatus for measuring pumping rate of pump - Google Patents
Apparatus for measuring pumping rate of pumpInfo
- Publication number
- JPS5696188A JPS5696188A JP17165579A JP17165579A JPS5696188A JP S5696188 A JPS5696188 A JP S5696188A JP 17165579 A JP17165579 A JP 17165579A JP 17165579 A JP17165579 A JP 17165579A JP S5696188 A JPS5696188 A JP S5696188A
- Authority
- JP
- Japan
- Prior art keywords
- curve
- pump
- discharge
- initial
- gross
- 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
Landscapes
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To permit measurement of the accurate pumping rate by compensating the H-Q curve (gross pump head versus pump discharge curve) for changes due to long use.
CONSTITUTION: The discharge pressure Hx of a pump at the time of the start is coupled through a pressure differential gauge 6 to a comparator 10 for comparison with the initial discharge pressure H0 of pump 2. The resultant difference value (H0-Hx) is stored in a storage unit 11. An operational unit 12 reads out the content stored in the storage unit 11 and calculates a new H-Q curve (shown by the solid plot, the dashed plot being the initial curve) at the level reduced by an amount corresponding to the difference on the basis of the read-out content from the initial H-Q curve (gross pump head versus pump discharge curve). From this new H-Q curve the pump discharge Qa corresponding to the input gross head Ha is obtained. In this way, accurate measurement of the pump discharge can always be obtained from the H-Q curve of the pump 2 irrespective of the variation of the H-Q curve in long use.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17165579A JPS5696188A (en) | 1979-12-27 | 1979-12-27 | Apparatus for measuring pumping rate of pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17165579A JPS5696188A (en) | 1979-12-27 | 1979-12-27 | Apparatus for measuring pumping rate of pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5696188A true JPS5696188A (en) | 1981-08-04 |
Family
ID=15927231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17165579A Pending JPS5696188A (en) | 1979-12-27 | 1979-12-27 | Apparatus for measuring pumping rate of pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5696188A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010059793A (en) * | 2008-09-01 | 2010-03-18 | Mitsubishi Electric Corp | Pump operation device, air conditioner and water heater |
WO2010082636A1 (en) * | 2009-01-16 | 2010-07-22 | 住友重機械工業株式会社 | Hybrid working machine and method of controlling same |
-
1979
- 1979-12-27 JP JP17165579A patent/JPS5696188A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010059793A (en) * | 2008-09-01 | 2010-03-18 | Mitsubishi Electric Corp | Pump operation device, air conditioner and water heater |
WO2010082636A1 (en) * | 2009-01-16 | 2010-07-22 | 住友重機械工業株式会社 | Hybrid working machine and method of controlling same |
US8548661B2 (en) | 2009-01-16 | 2013-10-01 | Sumitomo Heavy Industries, Ltd. | Hybrid working machine and controlling method thereof |
JP5562870B2 (en) * | 2009-01-16 | 2014-07-30 | 住友重機械工業株式会社 | Hybrid work machine and control method thereof |
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