GB1325670A - Axial flow fans the impellar vanes of which are adjustable during operation - Google Patents
Axial flow fans the impellar vanes of which are adjustable during operationInfo
- Publication number
- GB1325670A GB1325670A GB2999871A GB2999871A GB1325670A GB 1325670 A GB1325670 A GB 1325670A GB 2999871 A GB2999871 A GB 2999871A GB 2999871 A GB2999871 A GB 2999871A GB 1325670 A GB1325670 A GB 1325670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- vanes
- impeller
- plate
- axial
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
1325670 Axial-flow fans NORDISK VENTILATOR CO A S 25 June 1971 [10 July 1970] 29998/71 Heading F1C An axial-flow fan has impeller vanes which are adjustable cyclically during an adjusting movement during fan operation. In one embodiment, Fig.1, the vanes 3 have eccentric members 5 which engage a groove 6 in an adjusting disc 7 mounted on a shaft 8 slightly inclined to impeller drive shaft 2. The impeller and disc are rotated with their respective shaft at the same speed. The disc 7 thereby oscillates at a small angle relative to the members 5 but small free-play at groove 6 and material elasticity prevent consequential adjustment of the vanes 3. Impeller vane adjustment is made by axial movement of shaft 8, the inclination of the plate 7 being such that during the axial adjusting movement the vanes are adjusted cyclically so that the pitch of at least one but not all of the vanes is adjusted at a time. The members 5 may instead be connected to the plate 7 by links (15), Fig.4 (not shown), the linkage having the necessary free-play. In another embodiment, Figs.11 and 12, (not shown), the shaft (8) is not rotatable. In Fig.13 (not shown), the plate (7) is mounted on a sleeve located on a fixed shaft (8) for hydraulic adjustment in the axial direction. In other embodiments the vane adjustment is effected by angular adjustment of an inclined plate (7) receiving the eccentric members (5) in axial slots (16), Figs. 5 and 6 (not shown), or connected thereto through links (17), Figs.7 and 8 (not shown). Fig.15 (not shown) displays two impellers mounted on opposite ends of a common hollow driving shaft (35) and each having vanes adjustable by a respective plate carried by an inclined shaft, the two inclined shafts being connected by a universal coupling. In another embodiment, Figs.9 and 10 (not shown), the axis of the adjusting shaft (8) is parallel but eccentric to the impeller shaft axis, and the plate (7) lies perpendicular to shaft (8) and has gear teeth (19) at its periphery in engagement with pinions (18) carried by the impeller vanes. The angle of the inclined adjusting shaft or the spacing of the eccentric adjusting shaft may be regulated; e.g., the eccentricity may be regulated by rotating one eccentric sleeve relatively to another eccentric sleeve.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK361070AA DK122977B (en) | 1970-07-10 | 1970-07-10 | Axial fan whose impeller has adjustable blades during operation. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1325670A true GB1325670A (en) | 1973-08-08 |
Family
ID=8124837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2999871A Expired GB1325670A (en) | 1970-07-10 | 1971-06-25 | Axial flow fans the impellar vanes of which are adjustable during operation |
Country Status (10)
Country | Link |
---|---|
US (1) | US3790301A (en) |
CA (1) | CA949524A (en) |
CH (1) | CH542368A (en) |
DE (1) | DE2132191A1 (en) |
DK (1) | DK122977B (en) |
FR (1) | FR2101584A5 (en) |
GB (1) | GB1325670A (en) |
NL (1) | NL7109529A (en) |
SE (1) | SE370986B (en) |
SU (1) | SU540580A3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2508957A (en) * | 2012-10-04 | 2014-06-18 | Snecma | Turbomachine propeller blade cyclic pitch setting device |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE433108B (en) * | 1977-05-17 | 1984-05-07 | Flaekt Ab | AXIAL SPOT WITH A SPEED WHEEL WITH ADJUSTABLE SHOOTERS |
SE404237B (en) * | 1977-05-17 | 1978-09-25 | Svenska Flaektfabriken Ab | AXIALFLEKT WITH A FLEKING WHEEL WITH ADJUSTABLE SHOVES |
GB2006144B (en) * | 1977-09-07 | 1982-01-13 | Westland Aircraft Ltd | Helicopter |
DE3227071C1 (en) * | 1982-07-20 | 1984-01-05 | Voith Gmbh J M | Axial fan with adjustable blades |
GB2476171B (en) * | 2009-03-04 | 2011-09-07 | Dyson Technology Ltd | Tilting fan stand |
FR2976982B1 (en) * | 2011-06-23 | 2015-02-27 | Snecma | BLOWER FOR TURBOJET ENGINE |
CN108757566A (en) * | 2018-06-28 | 2018-11-06 | 王冬冬 | A kind of electric fan of adjustable wind wing corner degree |
CN109372796B (en) * | 2018-10-11 | 2020-06-26 | 山东劳动职业技术学院(山东劳动技师学院) | Radiator fan for power distribution cabinet |
FR3128571A1 (en) | 2021-10-22 | 2023-04-28 | Raydiall | Pre-assembled connector sub-assembly comprising a central contact and two crimping parts of different material and/or thickness, coil of sub-assemblies and associated method of assembling a connector to a cable. |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA555690A (en) * | 1958-04-08 | Henrich C.J. Focke | Means for stabilizing a helicopter flying machine | |
DE717714C (en) * | 1937-11-21 | 1942-02-20 | Deutsches Reich Vertreten Durc | Steep screw control |
GB531608A (en) * | 1938-01-18 | 1941-01-08 | Brandenburgische Motorenwerke | Improvements in or relating to aircraft with rotating wing systems |
US2512461A (en) * | 1944-07-08 | 1950-06-20 | Curtiss Wright Corp | Helicopter lifting rotor mechanism |
US3080002A (en) * | 1961-06-29 | 1963-03-05 | Doman Helicopters Inc | Rotor with fixed pylon |
US3321022A (en) * | 1963-10-25 | 1967-05-23 | Oguri Yoshiyuki | Rotary wing assembly |
US3574483A (en) * | 1969-09-18 | 1971-04-13 | United Aircraft Corp | Pitch control mechanism for bladed rotor |
-
1970
- 1970-07-10 DK DK361070AA patent/DK122977B/en unknown
-
1971
- 1971-06-25 GB GB2999871A patent/GB1325670A/en not_active Expired
- 1971-06-29 CA CA116,909A patent/CA949524A/en not_active Expired
- 1971-06-29 DE DE19712132191 patent/DE2132191A1/en active Pending
- 1971-07-01 US US00158794A patent/US3790301A/en not_active Expired - Lifetime
- 1971-07-05 CH CH984171A patent/CH542368A/en not_active IP Right Cessation
- 1971-07-08 SE SE7108864A patent/SE370986B/xx unknown
- 1971-07-09 NL NL7109529A patent/NL7109529A/xx unknown
- 1971-07-09 SU SU1679925A patent/SU540580A3/en active
- 1971-07-12 FR FR7125479A patent/FR2101584A5/fr not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2508957A (en) * | 2012-10-04 | 2014-06-18 | Snecma | Turbomachine propeller blade cyclic pitch setting device |
US9435214B2 (en) | 2012-10-04 | 2016-09-06 | Snecma | Turbomachine propeller blade setting device |
GB2508957B (en) * | 2012-10-04 | 2018-03-28 | Snecma | Turbomachine Propeller Blade Setting Device |
Also Published As
Publication number | Publication date |
---|---|
DK122977B (en) | 1972-05-01 |
US3790301A (en) | 1974-02-05 |
SE370986B (en) | 1974-11-04 |
CA949524A (en) | 1974-06-18 |
PL73642B1 (en) | 1974-10-30 |
SU540580A3 (en) | 1976-12-25 |
DE2132191A1 (en) | 1972-01-13 |
FR2101584A5 (en) | 1972-03-31 |
CH542368A (en) | 1973-09-30 |
NL7109529A (en) | 1972-01-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |