JPS55160196A - Constant-discharge-pressure pump - Google Patents
Constant-discharge-pressure pumpInfo
- Publication number
- JPS55160196A JPS55160196A JP6096479A JP6096479A JPS55160196A JP S55160196 A JPS55160196 A JP S55160196A JP 6096479 A JP6096479 A JP 6096479A JP 6096479 A JP6096479 A JP 6096479A JP S55160196 A JPS55160196 A JP S55160196A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- discharge pressure
- increases
- discharge
- diaphragm
- 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.)
- Granted
Links
Landscapes
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To maintain a constant orginally determined discharge pressure if flow rate varies from the maximum to the minimum, by using so-called a clearance regulation system that varies each clearance of an free end of an open-type impeller.
CONSTITUTION: As a discharge pressure increases, a pressure in a pressure fluctuation chamber 39 increases, thereby making a diaphragm 9 shift in the direction to widen clearances "a" of both impellers 5, 6, although resulting in lower performance. Consequently a discharge pressure may be prevented from increasing and kept at a specified value H1 if an amount of service water decreases. When the amount of service water increases at an operation point (C), a discharge pressure begins to decrease. Becuase the atendant decrease in pressure in the pressure fluctuation chamber 39 is insufficient to permit the diaphragm 9 to shift for a required distance in practical service, a discharge pressure downs to a lower limit H2, at which a pressure switch 55 is activated to open a valve 150 and close a valve 59. Then a discharge pressure is turned to reach the demanded value H1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6096479A JPS55160196A (en) | 1979-05-16 | 1979-05-16 | Constant-discharge-pressure pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6096479A JPS55160196A (en) | 1979-05-16 | 1979-05-16 | Constant-discharge-pressure pump |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1078979A Division JPS55104595A (en) | 1979-01-31 | 1979-01-31 | Constant discharge pressure pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55160196A true JPS55160196A (en) | 1980-12-12 |
| JPH0112960B2 JPH0112960B2 (en) | 1989-03-02 |
Family
ID=13157597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6096479A Granted JPS55160196A (en) | 1979-05-16 | 1979-05-16 | Constant-discharge-pressure pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55160196A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101688A (en) * | 1992-09-24 | 1994-04-12 | Sogo Pump Seisakusho:Kk | Discharge characteristic controlling type centrifugal pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5330521A (en) * | 1976-08-31 | 1978-03-22 | Shin Kobe Electric Machinery | Method of assembling electrically driven cart |
-
1979
- 1979-05-16 JP JP6096479A patent/JPS55160196A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5330521A (en) * | 1976-08-31 | 1978-03-22 | Shin Kobe Electric Machinery | Method of assembling electrically driven cart |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101688A (en) * | 1992-09-24 | 1994-04-12 | Sogo Pump Seisakusho:Kk | Discharge characteristic controlling type centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0112960B2 (en) | 1989-03-02 |
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