GB541681A - Improvements in and connected with screw fans - Google Patents
Improvements in and connected with screw fansInfo
- Publication number
- GB541681A GB541681A GB2937039A GB2937039A GB541681A GB 541681 A GB541681 A GB 541681A GB 2937039 A GB2937039 A GB 2937039A GB 2937039 A GB2937039 A GB 2937039A GB 541681 A GB541681 A GB 541681A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- rotation
- partly
- plane
- 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
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
541,681. Screw fans. MILLAR, A. L. May 4, 1940, No. 29370/39. [Class 114] In a screw fan, the leading edge 2 of each blade is straight and lies substantially in a plane of rotation, the inner end of the trailing edge 4 forms an angle of about 30 degrees with the leading edge, both edges if projected would intersect the axis of rotation, and the outer end of the trailing edge is connected by a curve 5 to a straight portion 6 which meets the leading edge at an angle of about 60 degrees. With two or more blades, all the leading edges are in the same plane of rotation, and with a pair of blades the leading edges may lie along a common diameter of the boss 3 or be slightly offset relative to one another. The whole of the trailing edges of each blade lies in a plane which contains the leading edge and is at an angle to the plane of rotation. In radial and axial directions, the working face of each blade may be concave or partly concave and partly flat, whilst the following face may be convex or partly convex and partly flat, the concavities and convexities being most marked where the blade is widest. According to the Provisional Specification the working face may be flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2937039A GB541681A (en) | 1940-05-04 | 1940-05-04 | Improvements in and connected with screw fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2937039A GB541681A (en) | 1940-05-04 | 1940-05-04 | Improvements in and connected with screw fans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB541681A true GB541681A (en) | 1941-12-08 |
Family
ID=10290458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2937039A Expired GB541681A (en) | 1940-05-04 | 1940-05-04 | Improvements in and connected with screw fans |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB541681A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052358A1 (en) * | 1980-11-14 | 1982-05-26 | Nippondenso Co., Ltd. | Cooling fan for automobiles |
| US4840541A (en) * | 1987-03-13 | 1989-06-20 | Nippondenso Co., Ltd. | Fan apparatus |
-
1940
- 1940-05-04 GB GB2937039A patent/GB541681A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052358A1 (en) * | 1980-11-14 | 1982-05-26 | Nippondenso Co., Ltd. | Cooling fan for automobiles |
| US4840541A (en) * | 1987-03-13 | 1989-06-20 | Nippondenso Co., Ltd. | Fan apparatus |
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