GB1172996A - Rotary Impeller Pumps - Google Patents
Rotary Impeller PumpsInfo
- Publication number
- GB1172996A GB1172996A GB2387066A GB2387066A GB1172996A GB 1172996 A GB1172996 A GB 1172996A GB 2387066 A GB2387066 A GB 2387066A GB 2387066 A GB2387066 A GB 2387066A GB 1172996 A GB1172996 A GB 1172996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flow
- inlet duct
- return flow
- directed
- reduce
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
- F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
1,172,996. Centrifugal and axial-flow pumps. ROLLS-ROYCE Ltd. May 25, 1967 [May 27, 1966], No.23870/66. Addition to 1,153,993. Heading F1C. The invention described in Specification 1, 153, 993 is modified by providing a controlled return flow of pumped liquid through lines 5,6 to inlet duct 1 to reduce the net positive suction pressure and thereby obtain substantially constant delivery pressure at constant pump speed. The return flow is controlled by a valve member 9 biased to its minimum flow position by a spring 10 adjustable by screw 12. The return flow is directed into the inlet duct against the main flow to reduce the net positive suction pressure, through one or more nozzles 15 carried by a ring-shaped pipe 14. Alternatively or additionally, the return flow may be directed with an upstream component of motion through an annular opening at a number of circumferentially spaced openings in the wall of the inlet duct. When introduced through the annular opening the return flow also reduces the effective flow area through the inlet duct.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2387066A GB1172996A (en) | 1966-05-27 | 1966-05-27 | Rotary Impeller Pumps |
DE19671653678 DE1653678A1 (en) | 1966-05-27 | 1967-05-26 | Rotary pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2387066A GB1172996A (en) | 1966-05-27 | 1966-05-27 | Rotary Impeller Pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1172996A true GB1172996A (en) | 1969-12-03 |
Family
ID=10202645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2387066A Expired GB1172996A (en) | 1966-05-27 | 1966-05-27 | Rotary Impeller Pumps |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1653678A1 (en) |
GB (1) | GB1172996A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5293902U (en) * | 1976-01-09 | 1977-07-13 | ||
CN104929955A (en) * | 2015-07-15 | 2015-09-23 | 烟台恒邦泵业有限公司 | Improved backflow pressure reducer for multistage high-lift centrifugal pump |
CN103206383B (en) * | 2013-04-11 | 2015-12-09 | 南京航空航天大学 | With the gas heart pump of impeller central ftercompction controlling device |
-
1966
- 1966-05-27 GB GB2387066A patent/GB1172996A/en not_active Expired
-
1967
- 1967-05-26 DE DE19671653678 patent/DE1653678A1/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5293902U (en) * | 1976-01-09 | 1977-07-13 | ||
CN103206383B (en) * | 2013-04-11 | 2015-12-09 | 南京航空航天大学 | With the gas heart pump of impeller central ftercompction controlling device |
CN104929955A (en) * | 2015-07-15 | 2015-09-23 | 烟台恒邦泵业有限公司 | Improved backflow pressure reducer for multistage high-lift centrifugal pump |
Also Published As
Publication number | Publication date |
---|---|
DE1653678A1 (en) | 1972-11-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1081164A (en) | Improvements in and relating to centrifugal pumps | |
GB1257567A (en) | ||
GB1076785A (en) | Improvements in or relating to centrifugal and mixed-flow fans, pumps and the like | |
GB1433283A (en) | Pitot pump with a jet pump charging system | |
ES454519A1 (en) | Means for reducing cavitation-induced erosion of centrifugal pumps | |
GB1195993A (en) | Centrifugal Pumps. | |
GB1259528A (en) | ||
GB1172996A (en) | Rotary Impeller Pumps | |
GB997863A (en) | Improvements relating to centrifugal pumps | |
GB1503905A (en) | Centrifugal fluid pumps | |
GB532758A (en) | Improvements in or relating to fans or pumps | |
GB1027790A (en) | Improvements in self-priming centrifugal pumps | |
GB1267023A (en) | ||
GB1120707A (en) | Control of inlet flow to centrifugal fluid movers | |
GB1107603A (en) | A pumping plant including means for controlling the pump delivery | |
GB1406074A (en) | Priming of centrifugal pumps | |
GB1058523A (en) | Improvements in or relating to centrifugal pumps | |
GB671309A (en) | An improved self-priming circulating pump | |
GB1087912A (en) | Improvements in or relating to centrifugal pumps | |
GB572053A (en) | Improvements in and relating to centrifugal pumps | |
GB1164262A (en) | Centrifugal Liquid Pumps. | |
SU137767A1 (en) | Auto-head centrifugal pump | |
GB786448A (en) | Improvements in and relating to pumps or fans provided with an axial flow impeller | |
GB920219A (en) | Improvements in or relating to centrifugal pumps | |
GB1257897A (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PCNP | Patent ceased through non-payment of renewal fee |