GB827670A - Improvements in or relating to rotors for axial flow fans and the like - Google Patents
Improvements in or relating to rotors for axial flow fans and the likeInfo
- Publication number
- GB827670A GB827670A GB2493/57A GB249357A GB827670A GB 827670 A GB827670 A GB 827670A GB 2493/57 A GB2493/57 A GB 2493/57A GB 249357 A GB249357 A GB 249357A GB 827670 A GB827670 A GB 827670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impeller
- blades
- root
- tip
- hub
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
-
- 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
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
827,670. Axial-flow fans. DAVIDSON & CO. Ltd. Dec. 19, 1957 [Jan. 23, 1957], No. 2493/57. Class 110 (1). In an impeller for an axial-flow fan or the like, the blade base has an ellipsoidal contour whereby the annular area of the passage decreases from the impeller inlet towards the impeller outlet, the geometrical pitch of the blades progressively increases towards the impeller outlet, and the geometrical pitch does not decrease from root to tip in any one plane which is parallel to the axis of rotation. The geometrical pitch varies from root to tip to equalize the absolute velocities at the outlet from the blades. Fixed impeller blades 13 may be followed by auxiliary blades 29 which may be detachable or adjustable, or both, in the manner described in Specification 702,312. The gap, measured in the axial direction, between the blades 13 and 29, is of the order of 0.01 to 0.03 of the overall chord, and may extend over part only of the radial lengths of the blades. The elliptical contour of the impeller hub 15 is continued by a fairing 30 which may be stationary as shown or may be attached to the hub 15. The blades may be of aerofoil or laminar form, the centroids of the blade sections being such that bending stresses are relieved by the centrifugal forces. The mean camber line may be parabolic or may be curved to a radius which varies from root to tip but is not less than that at the root. The fairing 30 may be omitted, and the impeller blade tips and the adjacent part of the fan casing may have a shape which is inverse to that of the ellipsoidal impeller hub. The impeller blades may have a solidity ratio greater than unity and may overlap when viewed in the axial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2493/57A GB827670A (en) | 1957-01-23 | 1957-01-23 | Improvements in or relating to rotors for axial flow fans and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2493/57A GB827670A (en) | 1957-01-23 | 1957-01-23 | Improvements in or relating to rotors for axial flow fans and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB827670A true GB827670A (en) | 1960-02-10 |
Family
ID=9740540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2493/57A Expired GB827670A (en) | 1957-01-23 | 1957-01-23 | Improvements in or relating to rotors for axial flow fans and the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB827670A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4842481A (en) * | 1986-08-11 | 1989-06-27 | Collins Ross S | Fluid pumps |
EP0680564A4 (en) * | 1991-09-05 | 1994-06-14 | Ind Design Labs Inc | Axial flow fan. |
US20140023510A1 (en) * | 2012-07-17 | 2014-01-23 | Ruck Ventilatoren Gmbh | Diagonal impeller for a diagonal fan, and diagonal fan |
WO2016142255A1 (en) * | 2015-03-11 | 2016-09-15 | Voith Patent Gmbh | Axial impeller and fan having such an axial impeller |
CN107127960A (en) * | 2017-05-09 | 2017-09-05 | 四川朗迪塑胶电器有限公司 | A kind of multistation electric fan apparatus for shaping |
WO2023029422A1 (en) * | 2021-09-06 | 2023-03-09 | 广东威灵电机制造有限公司 | Electric fan and cleaning apparatus |
-
1957
- 1957-01-23 GB GB2493/57A patent/GB827670A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4842481A (en) * | 1986-08-11 | 1989-06-27 | Collins Ross S | Fluid pumps |
EP0680564A4 (en) * | 1991-09-05 | 1994-06-14 | Ind Design Labs Inc | Axial flow fan. |
EP0680564A1 (en) * | 1991-09-05 | 1995-11-08 | Industrial Design Labs, Inc. | Axial flow fan |
US20140023510A1 (en) * | 2012-07-17 | 2014-01-23 | Ruck Ventilatoren Gmbh | Diagonal impeller for a diagonal fan, and diagonal fan |
WO2016142255A1 (en) * | 2015-03-11 | 2016-09-15 | Voith Patent Gmbh | Axial impeller and fan having such an axial impeller |
US10670044B2 (en) | 2015-03-11 | 2020-06-02 | Voith Patent Gmbh | Axial impeller and fan having such an axial impeller |
CN107127960A (en) * | 2017-05-09 | 2017-09-05 | 四川朗迪塑胶电器有限公司 | A kind of multistation electric fan apparatus for shaping |
CN107127960B (en) * | 2017-05-09 | 2023-07-07 | 四川朗迪塑胶电器有限公司 | Multistation fan flabellum shaping device |
WO2023029422A1 (en) * | 2021-09-06 | 2023-03-09 | 广东威灵电机制造有限公司 | Electric fan and cleaning apparatus |
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