US20080050239A1 - Propeller Blower, Shell Propeller - Google Patents
Propeller Blower, Shell Propeller Download PDFInfo
- Publication number
- US20080050239A1 US20080050239A1 US10/563,420 US56342005A US2008050239A1 US 20080050239 A1 US20080050239 A1 US 20080050239A1 US 56342005 A US56342005 A US 56342005A US 2008050239 A1 US2008050239 A1 US 2008050239A1
- Authority
- US
- United States
- Prior art keywords
- rotation
- impeller disk
- blades
- propeller
- blower according
- 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.)
- Abandoned
Links
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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
- F04D29/30—Vanes
-
- 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
- F04D29/329—Details of the hub
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a propeller blower for axial outflow of suctioned air by means of an impeller disk (2) which is adjacent to the inside of the flow channel, said impeller disk comprising convex blades (1). The blades (1) are embodied as shell blades with elongate extensions. An end region (20) is connected to the impeller disk (2) in the area of penetration. The other end (21) extends in radial manner towards the outside and has increasing radial distances with the axial components in the direction of flow.
Description
- The invention relates to a propeller blower for substantially axially directing the outflow of gaseous or liquid media by means of a hub driven rotary around an axis of rotation, delimiting the flow on the inside and formed to the impeller disk, which comprises blades bent in the blade area between blade entrance edge and blade discharge edge in flow direction.
- A known blower of this type (100 20 878 C2) is provided with a guide surface on the outside. Thereby only a strictly limited suction area is possible in the axial direction.
- It is the object of the present invention, to design a propeller blower of this type such that the medium sucked in flows in in hemispherical manner and flows out in axial direction such that for example steams rising in kitchens can by captured extensively without using a hood.
- This is achieved in the propeller blower of the type indicated above in that each conveying blade is formed in the shape of an oyster shell with longitudinal extension and is connected in an end portion with the impeller disk mentioned above and is perpendicular to the impeller disk at the connection line, while the other end portion is oriented with increasing radial distance in axial direction. In that the blades comprise a concave curvature in the direction of rotation.
- The blades resemble the pearl or river pearl oyster (Margaritana margaritifera) in their longitudinal, oval extension. The hub or impeller disk can have a flat shape, or it can be implemented as spheriod or in parabolic or hyperbolic shape.
- The proposed propeller blower accelerates the conveyed medium in the inner area near the shaft mainly in radial direction. The described conveying blades bent concavely in the direction of rotation guide the medium flowing outwardly at the outer edge towards the axial direction such that an enclosure of the blower, for example by means of a pipe, is not required. A simple calculation and the experiment even show that medium is sucked in at the outer edge. That is, the circumferential velocity at the outer edge is larger there than the radial velocity of the medium achievable by centrifugal forces. Thus, for example, rising warm air in kitchens can be discharged without hood. The shape of the blades does also not allow any simple vibrations of the blades, which would create noise. Measurements confirm a noise level of the propeller blower, which is up to 8 dB lower compared to axial blowers of the same size operated at the same speed. By suitable shaping of the blades it can also be achieved that with the proposed blower the angle of the medium flowing off is opened up to approximately 25°. Since large amounts are entrained from the surrounding medium thereby, large volumes can be moved in this manner. In one of these propeller blowers of 14 cm diameter blowing down from the ceiling 1 m3/s air at 1250 rev/min were measured. Thus this small blower can replace the large, slowly running ceiling blowers.
- The invention is explained below by way of example with reference to the drawing.
-
FIG. 1 shows a diagrammatic view of an impeller disk with only one blade for a propeller blower according to the (; invention. -
FIG. 2 shows a diagrammatic view of the blade shown inFIG. 1 , detached from the impeller disk. -
FIG. 3 shows the impeller disk with indentations and a blade. -
FIG. 4 shows a sectional view according to A-B ofFIG. 2 . -
FIG. 5 shows a diagrammatic view of another propeller blower according to the invention. - According to the
FIGS. 1 to 3 , theimpeller disk 2 is driven rotary around the axis of rotation 3. The direction of rotation is indicated by thearrow 5. - For the sake of a better overview only one
blade 1 is shown in theFIGS. 1 to 3 . In the practical implementation usuallyseveral blades 1, spaced uniformly of not uniformly, also in different sizes, will be attached to the impeller disk. - The
blade 1 has substantially the shape of an oyster shell and is integrally connected with theimpeller disk 2, or incorporated or glued into it. They can be formed by injected or moulded parts; it is substantial that theblade 1 and theimpeller disk 2 have entered into a so-called penetration such that adedendum line 6 is created, which merges outside of the penetration into the discharge edge of theblade 1. The edge opposed to thededendum line 6 is theblade entrance edge 22, at which the medium flows in. It can be seen inFIG. 1 by thearrows 30 that the blade entrance edge extends up to the outer area. In thearea 20 theblade 1 is oriented radially, while it is axially oriented in thearea 21. -
FIG. 2 again illustrates the special shape of theblade 1, wherein inFIG. 4 the section A-B fromFIG. 2 is shown. The angle 4 shown inFIG. 4 indicates the inflow angle between thevector 5 of the rotary velocity and the edge direction of theblade 1. - In
FIG. 3 an indentation 4 in theimpeller disk 2 can be recognised before thededendum line 6, which contributes to the increase of the radial flow. With the proposed propeller blower also water and air crafts can be driven. - A propeller according to the invention is proposed in
FIG. 5 , which also at its outer edge still sucks in the conveyed medium such as water or air. An especially advantageous arrangement of this new propeller regarding the sucking in of air or other liquids from a space under differential pressure is obtained, when the location of the outer edges orpropeller blades 1, where the sucking-in turns into the outflow, is situated according toFIG. 5 exactly inside of a hole in the plane of theouter wall 10 of the space the medium is to be sucked off from. The plane of the outer wall is then, according toFIG. 5 , near the outer edge of thepropeller blades 1.Arrows 30 indicate the flow direction. It is additionally illustrated inFIG. 5 that L the edges of thepropeller blades 1 can be rounded such that the propeller blades do not have any corners, as shown in the bottom part ofFIG. 2 . - The feature of a conically spread outflow, which can still be somewhat extended by suitable shaping, enables blowing of air through cooling pipes assembled in cooling packs, without the necessity of any limiting plates at the entrance or discharge edge. Thus, sucking off media from a room can be enabled, wherein the propeller is situated on the suction side inside the room and the opening is enclosed by a slotted pipe, in order to reduce the noise generated by Karman vortexes.
Claims (9)
1. Propeller blower for substantially axial outflow of sucked in air with an impeller disk (2) rotary driven around an axis of rotation (3) and limiting the flow channel on the inside, comprising blades (1) which are, viewed in the blade area between blade entrance edge (22) and blade discharge edge, bent in flow direction (30), characterised in that each blade (1) is formed in the shape of an oyster shell having a longitudinal extension, the end portion (20) of which is connected with the impeller disk (2) in form of a penetration (6), and the other, free end portion (21) of which extends radially outwards and with increasing radial distance with an axial component in flow direction, and that the blades (1) are bent towards the circumferential direction (5) of the rotary drive of the impeller disk (2).
2. Propeller blower according to claim 1 , characterised in that the conveying blades (1) are arranged almost perpendicularly to the vector of the direction of rotation in the vicinity of the axis of rotation (3) and the entrance edges (22) of the blades are bent from the inside to the outer edge concavely to the direction of rotation (5).
3. Propeller blower according to claim 1 , characterised in that the radially inner extensions of the blades have a radial distance to the axis of rotation (3), and the dedendum line (6) points past the axis of rotation (3) in the direction of rotation.
4. Propeller blower according to claim 1 , characterised in that an indentation (4) is formed on the impeller disk (2) in the area before the dedendum line (6).
5. Propeller blower according to claim 2 , characterised in that the radially inner extensions of the blades have a radial distance to the axis of rotation (3), and the dedendum line (6) points past the axis of rotation (3) in the direction of rotation.
6. Propeller blower according to claim 2 , characterised in that an indentation (4) is formed on the impeller disk (2) in the area before the dedendum line (6).
7. Propeller blower according to claim 3 , characterised in that an indentation (4) is formed on the impeller disk (2) in the area before the dedendum line (6).
8. Propeller blower according to claim 5 , characterised in that an indentation (4) is formed on the impeller disk (2) in the area before the dedendum line (6).
9. Propeller blower according to claim 6 , characterised in that an indentation (4) is formed on the impeller disk (2) in the area before the dedendum line (6).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410010457 DE102004010457B3 (en) | 2004-03-01 | 2004-03-01 | Propeller fan with shell propeller for blowing air has each blade in form of shell bowl extending longitudinally |
DE102004010457.3 | 2004-03-01 | ||
DE200410043618 DE102004043618A1 (en) | 2004-09-07 | 2004-09-07 | Propeller blower for axial flow of gas or liquid media blows out suctioned air using impeller disc with convex shell blades which extend in a radial direction from the disc |
DE102004043618.5 | 2004-09-07 | ||
PCT/EP2005/001976 WO2005083270A1 (en) | 2004-03-01 | 2005-02-25 | Propeller blower, shell propeller |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080050239A1 true US20080050239A1 (en) | 2008-02-28 |
Family
ID=34913345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/563,420 Abandoned US20080050239A1 (en) | 2004-03-01 | 2005-02-25 | Propeller Blower, Shell Propeller |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080050239A1 (en) |
EP (1) | EP1721080A1 (en) |
JP (1) | JP2007506037A (en) |
WO (1) | WO2005083270A1 (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2212555A (en) * | 1938-01-20 | 1940-08-27 | Heinze Electric Company | Fan construction |
US2658455A (en) * | 1948-02-26 | 1953-11-10 | Laval Steam Turbine Co | Impeller with center intake |
US2709035A (en) * | 1950-11-13 | 1955-05-24 | Gilbert Co A C | Air streaming fan |
US4063852A (en) * | 1976-01-28 | 1977-12-20 | Torin Corporation | Axial flow impeller with improved blade shape |
US4678410A (en) * | 1984-08-03 | 1987-07-07 | Braun Aktiengesellschaft | Hair dryer with axial blower |
US5320493A (en) * | 1992-12-16 | 1994-06-14 | Industrial Technology Research Institute | Ultra-thin low noise axial flow fan for office automation machines |
US5393199A (en) * | 1992-07-22 | 1995-02-28 | Valeo Thermique Moteur | Fan having a blade structure for reducing noise |
US5910045A (en) * | 1995-09-07 | 1999-06-08 | Daikin Industries, Ltd. | Air discharge unit for underfloor air conditioning and underfloor air conditioning system using same |
US6544010B1 (en) * | 2000-06-09 | 2003-04-08 | Lg Electronics Co., Ltd. | Axial flow fan with brushless direct current motor |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE723635A (en) * | 1968-11-08 | 1969-04-16 | ||
DE2951775A1 (en) * | 1978-12-26 | 1980-07-03 | Nissan Motor | COOLING FAN |
DE10020878C2 (en) * | 2000-04-28 | 2002-05-02 | Verax Ventilatoren Gmbh | Fans, in particular for ventilating electronic devices |
US20020085935A1 (en) * | 2000-12-28 | 2002-07-04 | Wen-Hao Chuang | Dual-effect heat dissipating fan |
-
2005
- 2005-02-25 US US10/563,420 patent/US20080050239A1/en not_active Abandoned
- 2005-02-25 JP JP2006527430A patent/JP2007506037A/en active Pending
- 2005-02-25 EP EP05715528A patent/EP1721080A1/en not_active Withdrawn
- 2005-02-25 WO PCT/EP2005/001976 patent/WO2005083270A1/en not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2212555A (en) * | 1938-01-20 | 1940-08-27 | Heinze Electric Company | Fan construction |
US2658455A (en) * | 1948-02-26 | 1953-11-10 | Laval Steam Turbine Co | Impeller with center intake |
US2709035A (en) * | 1950-11-13 | 1955-05-24 | Gilbert Co A C | Air streaming fan |
US4063852A (en) * | 1976-01-28 | 1977-12-20 | Torin Corporation | Axial flow impeller with improved blade shape |
US4678410A (en) * | 1984-08-03 | 1987-07-07 | Braun Aktiengesellschaft | Hair dryer with axial blower |
US5393199A (en) * | 1992-07-22 | 1995-02-28 | Valeo Thermique Moteur | Fan having a blade structure for reducing noise |
US5320493A (en) * | 1992-12-16 | 1994-06-14 | Industrial Technology Research Institute | Ultra-thin low noise axial flow fan for office automation machines |
US5910045A (en) * | 1995-09-07 | 1999-06-08 | Daikin Industries, Ltd. | Air discharge unit for underfloor air conditioning and underfloor air conditioning system using same |
US6544010B1 (en) * | 2000-06-09 | 2003-04-08 | Lg Electronics Co., Ltd. | Axial flow fan with brushless direct current motor |
Also Published As
Publication number | Publication date |
---|---|
WO2005083270A1 (en) | 2005-09-09 |
JP2007506037A (en) | 2007-03-15 |
EP1721080A1 (en) | 2006-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |