GB1431680A - Fan impellers - Google Patents
Fan impellersInfo
- Publication number
- GB1431680A GB1431680A GB3500775A GB3500775A GB1431680A GB 1431680 A GB1431680 A GB 1431680A GB 3500775 A GB3500775 A GB 3500775A GB 3500775 A GB3500775 A GB 3500775A GB 1431680 A GB1431680 A GB 1431680A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slot
- blade
- crease
- edge
- disc
- 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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
- F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
1431680 Making fan impellers K O L WALLMAN 10 April 1973 [12 April 1972] 35007/75 Divided out of 1431679 Heading B3A [Also in Division F1] A fan impeller disc having a generally circular profile is formed with circumferentially spaced slots around its periphery, the peripheral edge of the disc at one side of each slot being offset radially outwardly of the peripheral edge at the other side of the slot and so shaped that it forms a projection adjacent the mouth of the slot, a fan blade being inserted into the slot and the projection then being deformed inwardly of the disc by the application of radial pressure so as to close the mouth at least substantially. Each blade 6, Figs. 7 and 8, is formed with a crease at the location whereat it is to be fitted into a slot 7 in a disc 3 by pressing the blade inwardly from the convex side 9 so as to form an intermediate wall 10 flanked by side walls 11, the spring between the side walls being substantially equal to the thickness of the disc so that when the blade is slid into the slot, the side walls engage around one edge 12 of the slot. The slot 7 is straight and the wall 10 is slightly curved, or vice versa, whereby the blade becomes clamped into the slot with the centre of one surface of the wall 10 engaging the slot edge 12 and the two ends of the other surface engaging the other slot edge 14. As shown, the length of the crease may be less than the blade chord, the blade being notched for this purpose at each end of the crease before or after the crease is formed. Instead, the blade may be without notches, and in this case the crease has, in addition to walls 11 engaging the slot edge 12, further walls 18, Fig. 11, at one or both ends of the crease to engage the slot edge 14. In the case shown, in which the walls 18 are provided at one end only of the crease, the edge 14 of the slot 7 is curved at 19 to follow the blade contour. In all cases after the blade has been inserted into the slot, a projecting part 21 is deformed by radial pressure into the position 20 to close the slot.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE472172A SE367234B (en) | 1972-04-12 | 1972-04-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1431680A true GB1431680A (en) | 1976-04-14 |
Family
ID=20264830
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3500775A Expired GB1431680A (en) | 1972-04-12 | 1973-04-10 | Fan impellers |
GB1722673A Expired GB1431679A (en) | 1972-04-12 | 1973-04-10 | Impellers for cross-flow fans |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1722673A Expired GB1431679A (en) | 1972-04-12 | 1973-04-10 | Impellers for cross-flow fans |
Country Status (5)
Country | Link |
---|---|
JP (2) | JPS5532919B2 (en) |
DE (2) | DE2365861C3 (en) |
FR (1) | FR2180371A5 (en) |
GB (2) | GB1431680A (en) |
SE (1) | SE367234B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5062706U (en) * | 1973-10-04 | 1975-06-07 | ||
US3921272A (en) * | 1974-05-24 | 1975-11-25 | Torin Corp | Blower wheel and method of making the same |
US3977062A (en) * | 1975-01-22 | 1976-08-31 | Knut Olof Lennart Wallman | Method of assembling blower rotors |
DE2517528C2 (en) * | 1975-04-21 | 1983-01-27 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Fan roller for blowers |
JPS5281581U (en) * | 1975-12-17 | 1977-06-17 | ||
JPS5653117Y2 (en) * | 1976-12-27 | 1981-12-10 | ||
JPS53125606A (en) * | 1977-04-09 | 1978-11-02 | Toshiba Corp | Manufacturing method of transvese-flow fan |
JPS5698598A (en) * | 1980-09-29 | 1981-08-08 | Hitachi Ltd | Manufacture of multivane fan |
JPS59130096U (en) * | 1984-01-09 | 1984-08-31 | 赤石金属工業株式会社 | Cylindrical multi-blade fan |
JPS59130097U (en) * | 1984-01-09 | 1984-08-31 | 赤石金属工業株式会社 | cylindrical multi-blade fan |
JPH02118196U (en) * | 1990-03-09 | 1990-09-21 | ||
CN102251971A (en) * | 2010-05-17 | 2011-11-23 | 海尔集团公司 | Cross-flow fan |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS415720Y1 (en) * | 1964-06-13 | 1966-03-26 | ||
US3262637A (en) * | 1964-11-04 | 1966-07-26 | Vernco Corp | Individual blade mountings in a blower wheel |
-
1972
- 1972-04-12 SE SE472172A patent/SE367234B/xx unknown
-
1973
- 1973-04-05 DE DE19732365861 patent/DE2365861C3/en not_active Expired
- 1973-04-05 DE DE19732317083 patent/DE2317083C3/en not_active Expired
- 1973-04-10 GB GB3500775A patent/GB1431680A/en not_active Expired
- 1973-04-10 GB GB1722673A patent/GB1431679A/en not_active Expired
- 1973-04-11 FR FR7313146A patent/FR2180371A5/fr not_active Expired
- 1973-04-11 JP JP4120073A patent/JPS5532919B2/ja not_active Expired
-
1975
- 1975-08-29 JP JP50104826A patent/JPS6014920B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2365861C3 (en) | 1978-12-14 |
DE2365861B2 (en) | 1978-04-20 |
DE2365861A1 (en) | 1976-07-29 |
JPS5532919B2 (en) | 1980-08-27 |
DE2317083B2 (en) | 1978-04-20 |
GB1431679A (en) | 1976-04-14 |
JPS5176609A (en) | 1976-07-02 |
FR2180371A5 (en) | 1973-11-23 |
DE2317083C3 (en) | 1978-12-21 |
SE367234B (en) | 1974-05-20 |
DE2317083A1 (en) | 1973-10-31 |
JPS6014920B2 (en) | 1985-04-16 |
JPS4920705A (en) | 1974-02-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19930409 |