GB780464A - Improvements in or relating to centrifugal fans - Google Patents
Improvements in or relating to centrifugal fansInfo
- Publication number
- GB780464A GB780464A GB36632/55A GB3663255A GB780464A GB 780464 A GB780464 A GB 780464A GB 36632/55 A GB36632/55 A GB 36632/55A GB 3663255 A GB3663255 A GB 3663255A GB 780464 A GB780464 A GB 780464A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- slots
- outer sides
- compressed air
- trailing edges
- 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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
780,464. Centrifugal fans. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Dec. 21, 1955 [Jan. 3, 1957], No. 36632/55. Class 110 (1). A centrifugal fan comprises hollow airfoil impeller blades supported between plates and having openings or slots in their outer sides adjacent their trailing edges, and means for supplying air under pressure into the blades to be blown through the openings. When it is desired to increase the discharge pressure of the fan, a valve 20, Fig. 4, is opened to the required degree to admit compressed air from a source 22 through a seal 19 to the bore 17 of the hollow shaft 18, and thence through radially-extending bores 16 and axially-extending bores 15 in the centre plate 11 to the hollow interiors of blades 14. The compressed air is expelled through slots 26 in the outer sides of the blades adjacent the trailing edges, and deflects the gas passing the outer sides outwardly, producing an effect as if the trailing edges were thickened and their angles of attack increased. The slots 26 may be replaced by pivoted flaps 27, Fig. 5, which are normally kept closed by the centrifugal effect of counterweights 29, but are opened to the dotted position by the compressed air.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US780464XA | 1957-01-03 | 1957-01-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB780464A true GB780464A (en) | 1957-07-31 |
Family
ID=22141593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36632/55A Expired GB780464A (en) | 1957-01-03 | 1955-12-21 | Improvements in or relating to centrifugal fans |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB780464A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2975962A (en) * | 1957-05-10 | 1961-03-21 | Konink Maschf Gebr Stork & Co | Impellers for centrifugal fans |
-
1955
- 1955-12-21 GB GB36632/55A patent/GB780464A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2975962A (en) * | 1957-05-10 | 1961-03-21 | Konink Maschf Gebr Stork & Co | Impellers for centrifugal fans |
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