GB1272645A - Fans e.g. for cooling motor vehicles - Google Patents
Fans e.g. for cooling motor vehiclesInfo
- Publication number
- GB1272645A GB1272645A GB4562669A GB4562669A GB1272645A GB 1272645 A GB1272645 A GB 1272645A GB 4562669 A GB4562669 A GB 4562669A GB 4562669 A GB4562669 A GB 4562669A GB 1272645 A GB1272645 A GB 1272645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- pitch
- abrupt
- aerodynamic forces
- fan
- 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
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
- F04D29/362—Blade mountings adjustable during rotation
- F04D29/368—Adjustment by differences of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
Abstract
1,272,645. Axial-flow fans. FOLKES BELTING CO., Ltd. Sept. 16, 1970 [Sept. 16, 1969], No.45626/69. Heading F1C. A fan, e.g. for a motor vehicle, has blades 2, Fig. 14, arranged to alter their pitch abruptly with changing temperature. The blades can be flexible to be responsive to aerodynamic forces exerted by the air-flow (i.e. responsive to fan speed), the particular temperature at which the abrupt pitch change occurs then being dependent on the applied aerodynamic forces. The pitch of the flexible blades increases with increasing ambient temperature and reduces with increasing aerodynamic forces. The abrupt pitch change is brought about by forming bulges 17, crimps or part-cylindrical depressions in the blades, or by forming the blades of bi-metallic material or of a material, e.g. nickel steel, having a different coefficient of expansion from the material, e.g. aluminium, of the radial arms to which they are attached. The abrupt pitch-changing characteristic of bi-metallic blades may be enhanced by curving the blades and thereafter bending over their outer edges 52 as shown in Fig.25, to restrain the blades in a substantially flat form until they are heated. The abrupt pitch changes of the respective blades of a multi-blade fan may occur at different temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4562669A GB1272645A (en) | 1969-09-16 | 1969-09-16 | Fans e.g. for cooling motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4562669A GB1272645A (en) | 1969-09-16 | 1969-09-16 | Fans e.g. for cooling motor vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1272645A true GB1272645A (en) | 1972-05-03 |
Family
ID=10437942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4562669A Expired GB1272645A (en) | 1969-09-16 | 1969-09-16 | Fans e.g. for cooling motor vehicles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1272645A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4025231A (en) * | 1975-11-26 | 1977-05-24 | Revcor, Inc. | Propeller fan construction |
| US4187055A (en) * | 1978-04-03 | 1980-02-05 | Vernco Corporation | Flexible fan |
| US4464594A (en) * | 1982-04-28 | 1984-08-07 | Mitsubishi Denki Kabushiki Kaisha | Vehicular generator with cooling fan made of rubber covered shape memorizing alloy |
| US4778339A (en) * | 1987-01-26 | 1988-10-18 | Usui Kokusai Sangyo Kabushiki Kaisha | Fan blade |
| GB2226369A (en) * | 1988-11-21 | 1990-06-27 | Usui Kokusai Sangyo Kk | Variable pitch fan blade |
| US7973374B2 (en) | 2007-12-10 | 2011-07-05 | Dongbu Hitek Co., Ltd. | Semiconductor device and method for fabricating the same |
| CN111608940A (en) * | 2020-05-25 | 2020-09-01 | 浙江上建风机有限公司 | Centrifugal fan blade and automatic overheat-proof axial flow fan of motor |
| CN111608941A (en) * | 2020-05-25 | 2020-09-01 | 浙江上建风机有限公司 | Axial flow fan capable of preventing fan blades from being bent |
-
1969
- 1969-09-16 GB GB4562669A patent/GB1272645A/en not_active Expired
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4025231A (en) * | 1975-11-26 | 1977-05-24 | Revcor, Inc. | Propeller fan construction |
| US4187055A (en) * | 1978-04-03 | 1980-02-05 | Vernco Corporation | Flexible fan |
| US4464594A (en) * | 1982-04-28 | 1984-08-07 | Mitsubishi Denki Kabushiki Kaisha | Vehicular generator with cooling fan made of rubber covered shape memorizing alloy |
| US4778339A (en) * | 1987-01-26 | 1988-10-18 | Usui Kokusai Sangyo Kabushiki Kaisha | Fan blade |
| GB2226369A (en) * | 1988-11-21 | 1990-06-27 | Usui Kokusai Sangyo Kk | Variable pitch fan blade |
| GB2226369B (en) * | 1988-11-21 | 1992-12-23 | Usui Kokusai Sangyo Kk | Fan blade. |
| US7973374B2 (en) | 2007-12-10 | 2011-07-05 | Dongbu Hitek Co., Ltd. | Semiconductor device and method for fabricating the same |
| DE102008061151B4 (en) * | 2007-12-10 | 2011-12-01 | Dongbu Hitek Co., Ltd. | Semiconductor component and method for its production |
| CN111608940A (en) * | 2020-05-25 | 2020-09-01 | 浙江上建风机有限公司 | Centrifugal fan blade and automatic overheat-proof axial flow fan of motor |
| CN111608941A (en) * | 2020-05-25 | 2020-09-01 | 浙江上建风机有限公司 | Axial flow fan capable of preventing fan blades from being bent |
| CN111608940B (en) * | 2020-05-25 | 2021-05-14 | 浙江上建风机有限公司 | Centrifugal fan blade and automatic overheat-proof axial flow fan of motor |
| CN111608941B (en) * | 2020-05-25 | 2021-06-08 | 浙江上建风机有限公司 | Axial flow fan capable of preventing fan blades from being bent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |