GB2005350A - Improvements in and relating to ventilating fan arrangements - Google Patents
Improvements in and relating to ventilating fan arrangementsInfo
- Publication number
- GB2005350A GB2005350A GB7837841A GB7837841A GB2005350A GB 2005350 A GB2005350 A GB 2005350A GB 7837841 A GB7837841 A GB 7837841A GB 7837841 A GB7837841 A GB 7837841A GB 2005350 A GB2005350 A GB 2005350A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fan
- wall
- impeller
- air
- extracted
- 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.)
- Withdrawn
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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/64—Mounting; Assembling; Disassembling of axial pumps
- F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
- F04D29/646—Mounting or removal of fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An axial flow fan mounted on a vertical axis above an underground passage through which air is to be circulated, comprises a first stationary wall 6 extending upwardly of the fan impeller 1 and of increasing circular boundary dimensions in the vertically upward direction whilst being symmetrical about the fan axis to form an inner wall of a diffusion chamber 10 for air being extracted by the fan, a second stationary wall 8 comprising a lower conical portion 8b disposed below the impeller and co-axially therewith whereby air being extracted converges towards the fan blades 3 and a further upper portion 8a extending above the impeller and of increasing circular boundary dimension in vertically upward direction, the minimum circumference of the wall 8 being located in the same horizontal region as the impeller and dimensioned to clear the tips of the fan blades, the upper portion 8a forming the outer wall of the diffusion chamber 10 which chamber is of annular hydraucone form and in vertical section is curved outwardly from the fan axis. The fan is surrounded by a sound-damping wall 22. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7837841A GB2005350A (en) | 1977-09-22 | 1978-09-22 | Improvements in and relating to ventilating fan arrangements |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3958577 | 1977-09-22 | ||
GB7837841A GB2005350A (en) | 1977-09-22 | 1978-09-22 | Improvements in and relating to ventilating fan arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2005350A true GB2005350A (en) | 1979-04-19 |
Family
ID=26264171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7837841A Withdrawn GB2005350A (en) | 1977-09-22 | 1978-09-22 | Improvements in and relating to ventilating fan arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2005350A (en) |
-
1978
- 1978-09-22 GB GB7837841A patent/GB2005350A/en not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |