EP2433014A1 - Fan blade - Google Patents
Fan bladeInfo
- Publication number
- EP2433014A1 EP2433014A1 EP10724699A EP10724699A EP2433014A1 EP 2433014 A1 EP2433014 A1 EP 2433014A1 EP 10724699 A EP10724699 A EP 10724699A EP 10724699 A EP10724699 A EP 10724699A EP 2433014 A1 EP2433014 A1 EP 2433014A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan blade
- fan
- cavity
- blade
- carrier element
- 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.)
- Granted
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
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
-
- 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
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/324—Blades
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- 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
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
Definitions
- the present invention relates to a fan blade, in particular for smoke extraction fans, with fastening means for fastening the fan blade to a fan hub and with a blade section.
- fans In general, fans consist of their basic construction of a fan hub to which a number of fan blades is mounted radially. The attachment of the fan blades by means of fasteners such. B. bolts.
- fan blades made of aluminum are their limited Usability at temperatures above about 300 0 C. Because the tensile strength of aluminum decreases sharply at the temperatures mentioned, so that the aluminum begins to flow gradually. Even special aluminum alloys do not significantly improve this inadequacy. As a result of this detrimental property of aluminum, fan blades can change shape and / or length at high temperatures, such as may occur in fires, so as to severely impair or even prohibit proper use in fires.
- this object is achieved in a fan blade of the type mentioned above in that the blade section has a cavity enclosing the outer jacket.
- the invention thus provides that the blade section of the fan blade is not solid throughout, as in the prior art. This results directly in a material and mass savings.
- a carrier element may be arranged in the cavity.
- the carrier element is integrally formed with the fastening means.
- the unit of the fastening means and the carrier element arranged in the cavity of the blade section can advantageously absorb all tensile forces during operation.
- the outer shell of the blade section fulfills according to this advantageous embodiment of this invention predominantly aerodynamic functions.
- a material optimized for the purpose of tensile fastening of the fan blade to the fan hub can be selected, and at the same time, irrespective of this, a material optimized for the aerodynamic shaping of the fan blade can be selected.
- the carrier element may advantageously be selected from a material with high hot tensile strength, hot tensile strength and good creep behavior at high temperatures.
- a light outer shell of the fan blade for example made of a suitable steel alloy, can be selected, without thereby impairing the overall strength of the fan blades.
- a suitable steel alloy for example made of a suitable steel alloy
- other materials or alloys, for example based on titanium can also be used.
- the carrier element is essentially made of a steel alloy and / or a titanium alloy
- the advantage in a particularly favorable embodiment of the invention is that the hot tensile strength and the creep behavior of the fan blade are particularly large. This is the case in particular with steel alloys. Because the hot tensile strength and the creep behavior of steel are - A -
- the carrier element can be configured in a modular manner from a plurality of individual elements that can be connected to one another in particular by a plug connection.
- the modular design of the carrier element enables a particularly cost-effective production based on standardized individual components, which are adaptable to different fan types.
- the modular design also allows manufacturing technology, the use of standardized components for a variety of fan blades, especially in terms of length.
- the carrier element has one or more adapted to a shape of the outer sheath profile chords.
- a profile shape of the fan blade can be realized in this way production technology by positive bending of the outer shell to the chords. Maintaining the aerodynamic profile of the fan blade even at high temperatures is therefore ensured with advantage.
- the cavity is configured with a foam-like filling compound.
- the foam-like filling material should expediently have a low mass or density.
- the outer sheath to maintain the aerodynamic profile in this way be supported by the foam-like filling material according to the invention. Bumping of the outer shell in areas, for example between chords of the support member is therefore effectively avoided.
- the fact that the cavity is filled with a foam-like filling compound is also avoided with advantage, that liquids accumulate in the cavity. The accumulation of liquids in the cavity would undesirably increase the effective mass of the fan blade.
- the vibration behavior and the damping of the blade are improved by the foaming. All this is effectively prevented by filling the cavity with the foam-like filling compound.
- a foam which can be stirred from two components has proved to be suitable as the filling compound.
- the outer jacket is provided in another embodiment of the invention with at least one through hole in the cavity inside, there results a further favorable embodiment of the invention.
- the bore is attached to the radially outer end of the fan blade, any liquid entering the cavity will be carried out of the cavity during operation by the centrifugal force. An undesirable increase in the mass of the fan blade by condensate accumulated in the interior and an increased risk of corrosion are thereby advantageously avoided.
- the attachment of a bore at the radially inner end of the fan blade in particular allows a review of internal welds, such as endoscopic procedures. This is advantageous if a welding of the outer shell to the carrier element is present.
- the outer shell is provided on the cavity side with a corrosion protection and / or is essentially made of a steel alloy. Both measures, alone or in combination, cause a significant improvement in the corrosion resistance of the outer jacket. This in turn allows the design of the outer shell thin-walled make. For example, a material thickness of the outer shell of 1 mm suffice.
- the outer shell of two or more interconnected plate-like shell elements.
- Fan blade is improved in an advantageous embodiment of the invention, when the outer sheath is provided on the outside with stiffening elements for stiffening the fan blade (6).
- the stiffening means can be arranged in another embodiment of the invention on a pressure side and / or on a negative pressure side of the outer shell.
- the stiffening means may be more pronounced on the negative pressure side than on the overpressure side.
- Figure 1 support element for a fan blade according to the invention in a perspective view
- FIG. 2 shows fan blade (a) according to the invention in an axial view and (b) in a radial sectional view;
- FIG. 3 fan blade according to the invention in an alternative
- FIG. 1 shows a perspective view of a steel girder scaffold 1.
- the steel girder 1 is constructed of a total of three chords 2.
- the chords 2 are connected via two transverse struts 3 with each other by a plug connection.
- the chords are connected by the cross braces 3 with each other such that a
- Twisting of the profile of one of the steel girder 1 by applying an outer shell on peripheral edges 4 of the chord 2 manufactured fan blade is generated.
- the standing in the figure in the foreground chord 2 is integrally connected to a mounting bolt 5. This can not be seen in FIG.
- the fastening bolt 5 serves to fasten the fan blade to the steel girder 1 shown in FIG. 1 in a fan hub (not shown).
- FIG. 2 shows a fan blade 6 according to the invention.
- the fan blade 6 has on the radial inner side of the fastening bolt 5, which has already been mentioned in connection with Figure 1.
- the fan blade 6 has a blade section 7.
- the blade section 7 consists of an outer casing 8.
- the outer casing 8 is made of a number of individual plates made of steel with a material thickness of 1 mm.
- the steel plates are on the peripheral edges 4 of the chord 2 of the steel girder 1 by
- the outer jacket 8 encloses in this way a cavity.
- the cavity is partially filled with the steel girder 1.
- the remaining cavity can be filled with a filling compound.
- the radial plan view according to part (b) of FIG. 2 shows the aerodynamic profile of the fan blade 6 particularly clearly. It can also be seen that a base plate 9 separates the blade section 7 from the fastening bolt 5.
- the fastening bolt 5 extends through the base plate 9.
- the profile of the outer casing 8 corresponds to the profile of the chords 2 of the steel girder frame 1 according to FIG.
- the steel girder 1 is preferably made of steel.
- the outer jacket 8 may be made of a steel alloy.
- an endoscope bore 13 may be present radially inward in the outer jacket 8.
- FIG. 3 shows an alternative embodiment of a fan blade according to the invention.
- the illustration and the basic structure essentially correspond to those of FIG. 2.
- the aforementioned blade 6 according to FIG. 3 is additionally provided with support plates 10, 11.
- the support plates 10, 11 are substantially perpendicular to the base plate 9.
- the support plates 10, 11 with its other edge substantially perpendicular to the surface of the
- the support plates 10, 11 are thus oriented substantially radially, but oriented to the outer shell 8 of the blade portion 7 is rotated substantially 90 °.
- the overpressure-side support plate 11 is stronger than the vacuum-side support plate 10.
- the support plates 10, 11 may also be connected.
- the construction of a fan blade 6 according to the invention is thus sketched with reference to FIGS. 1 to 3.
- the fan blade 6 according to the invention is characterized in that a outer casing 8, for example made of a steel alloy, is welded onto a steel girder frame 1. The welding takes place along the
- the outer casing 8 encloses a cavity in which the steel girder 1 is arranged.
- the remaining cavity can be filled with a filler according to the invention. Obtained in the manner described in the context of the invention, a special lightweight, material-saving producible yet tensile design of a fan blade.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10724699T PL2433014T3 (en) | 2009-05-20 | 2010-05-19 | Fan blade |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009022181A DE102009022181A1 (en) | 2009-05-20 | 2009-05-20 | fan blade |
PCT/EP2010/003082 WO2010133354A1 (en) | 2009-05-20 | 2010-05-19 | Fan blade |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2433014A1 true EP2433014A1 (en) | 2012-03-28 |
EP2433014B1 EP2433014B1 (en) | 2019-05-01 |
Family
ID=42937361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10724699.3A Not-in-force EP2433014B1 (en) | 2009-05-20 | 2010-05-19 | Fan blade |
Country Status (12)
Country | Link |
---|---|
US (1) | US9869325B2 (en) |
EP (1) | EP2433014B1 (en) |
KR (2) | KR101938349B1 (en) |
CN (1) | CN102439320A (en) |
AU (1) | AU2010251465B2 (en) |
DE (1) | DE102009022181A1 (en) |
DK (1) | DK2433014T3 (en) |
ES (1) | ES2733090T3 (en) |
PL (1) | PL2433014T3 (en) |
PT (1) | PT2433014T (en) |
TR (1) | TR201908892T4 (en) |
WO (1) | WO2010133354A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8681168B2 (en) | 2009-01-15 | 2014-03-25 | Arm Limited | Methods of and apparatus for processing graphics |
US9965886B2 (en) | 2006-12-04 | 2018-05-08 | Arm Norway As | Method of and apparatus for processing graphics |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107965468A (en) * | 2017-07-10 | 2018-04-27 | 常州信息职业技术学院 | A kind of flabellum blade construction |
USD951427S1 (en) * | 2020-07-06 | 2022-05-10 | Gt Karbon Izleme Ve Enerji Verimliligi Sanayi Ticaret Limited Sirketi | Ventilator blade |
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DE1428280A1 (en) * | 1963-03-29 | 1969-06-04 | Schmidt Sche Heissdampfgmbh | Wing in frame construction in welded, riveted or screwed design, especially for axial fans of large dimensions and high performance |
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-
2009
- 2009-05-20 DE DE102009022181A patent/DE102009022181A1/en not_active Withdrawn
-
2010
- 2010-05-19 WO PCT/EP2010/003082 patent/WO2010133354A1/en active Application Filing
- 2010-05-19 DK DK10724699.3T patent/DK2433014T3/en active
- 2010-05-19 KR KR1020177018404A patent/KR101938349B1/en active IP Right Grant
- 2010-05-19 EP EP10724699.3A patent/EP2433014B1/en not_active Not-in-force
- 2010-05-19 PL PL10724699T patent/PL2433014T3/en unknown
- 2010-05-19 CN CN201080022389XA patent/CN102439320A/en active Pending
- 2010-05-19 TR TR2019/08892T patent/TR201908892T4/en unknown
- 2010-05-19 US US13/321,398 patent/US9869325B2/en not_active Expired - Fee Related
- 2010-05-19 ES ES10724699T patent/ES2733090T3/en active Active
- 2010-05-19 PT PT10724699T patent/PT2433014T/en unknown
- 2010-05-19 AU AU2010251465A patent/AU2010251465B2/en not_active Ceased
- 2010-05-19 KR KR1020117028714A patent/KR20120042749A/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010133354A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9965886B2 (en) | 2006-12-04 | 2018-05-08 | Arm Norway As | Method of and apparatus for processing graphics |
US8681168B2 (en) | 2009-01-15 | 2014-03-25 | Arm Limited | Methods of and apparatus for processing graphics |
Also Published As
Publication number | Publication date |
---|---|
EP2433014B1 (en) | 2019-05-01 |
PT2433014T (en) | 2019-06-04 |
CN102439320A (en) | 2012-05-02 |
AU2010251465A1 (en) | 2012-01-19 |
DK2433014T3 (en) | 2019-07-29 |
KR20170081754A (en) | 2017-07-12 |
TR201908892T4 (en) | 2019-07-22 |
KR20120042749A (en) | 2012-05-03 |
WO2010133354A1 (en) | 2010-11-25 |
US9869325B2 (en) | 2018-01-16 |
AU2010251465B2 (en) | 2015-03-12 |
KR101938349B1 (en) | 2019-01-14 |
PL2433014T3 (en) | 2019-10-31 |
ES2733090T3 (en) | 2019-11-27 |
DE102009022181A1 (en) | 2010-11-25 |
US20120063906A1 (en) | 2012-03-15 |
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