EP2433014B1 - Ventilatorschaufel - Google Patents

Ventilatorschaufel Download PDF

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Publication number
EP2433014B1
EP2433014B1 EP10724699.3A EP10724699A EP2433014B1 EP 2433014 B1 EP2433014 B1 EP 2433014B1 EP 10724699 A EP10724699 A EP 10724699A EP 2433014 B1 EP2433014 B1 EP 2433014B1
Authority
EP
European Patent Office
Prior art keywords
fan blade
outer shell
blade
fan
support 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.)
Not-in-force
Application number
EP10724699.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2433014A1 (de
Inventor
Henrik Witt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
W & S Management GmbH and Co KG
Original Assignee
W & S Management GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by W & S Management GmbH and Co KG filed Critical W & S Management GmbH and Co KG
Priority to PL10724699T priority Critical patent/PL2433014T3/pl
Publication of EP2433014A1 publication Critical patent/EP2433014A1/de
Application granted granted Critical
Publication of EP2433014B1 publication Critical patent/EP2433014B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/32—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. See for example US 2 342 421 A1 ,
  • fan blades can be massively made of aluminum or an aluminum alloy.
  • a disadvantage of fan blades made of aluminum is their limited Usability at temperatures above about 300 ° 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 in that it has the feature combination of claim 1.
  • the blade section has a cavity enclosing the outer jacket. It is thus provided 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 is arranged according to the invention 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 especially big. This is the case in particular with steel alloys. Because the hot tensile strength and the creep behavior of steel are even at temperatures above, for example, 300 ° C excellent. In particular, the hot tensile strength at the temperatures mentioned is much better than that of aluminum.
  • the carrier element is modularly configured 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.
  • the torsional strength of the fan blade according to the invention is improved in an advantageous embodiment of the invention, when the outer jacket 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.
  • FIG. 1 a steel girder scaffold 1 is shown in a perspective view.
  • 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 to each other by the cross braces 3, that a twist of the profile of one of the steel support frame 1 by applying an outer shell on peripheral edges 4 of the chord 2 made fan blade is generated.
  • the standing in the figure in the foreground chord 2 is integrally connected to a mounting bolt 5. This is in FIG. 1 not visible.
  • the fastening bolt 5 is used to attach the fan blade with the in FIG. 1 shown steel girder 1 in a fan hub, not shown.
  • FIG. 2 a fan blade 6 according to the invention is shown.
  • the fan blade 6 has on the radial inside the fastening bolt 5, which already in connection with FIG. 1 was mentioned.
  • 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 mounted on the peripheral edges 4 of the chord 2 of the steel girder frame 1 by welding.
  • 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 clear. 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 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 representation and the basic structure correspond essentially to those of FIG. 2 , Said blade 6 according to FIG. 3 However, 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 outer jacket 8.
  • the support plates 10, 11 are thus oriented substantially radially, but to the Outer jacket 8 of the blade portion 7 is rotated substantially rotated by 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 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 peripheral edges 4 of the chords 2 of the steel girder frame 1. In this way, the outer shell 8 surrounds 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP10724699.3A 2009-05-20 2010-05-19 Ventilatorschaufel Not-in-force EP2433014B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10724699T PL2433014T3 (pl) 2009-05-20 2010-05-19 Łopatka wentylatora

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009022181A DE102009022181A1 (de) 2009-05-20 2009-05-20 Ventilatorschaufel
PCT/EP2010/003082 WO2010133354A1 (de) 2009-05-20 2010-05-19 Ventilatorschaufel

Publications (2)

Publication Number Publication Date
EP2433014A1 EP2433014A1 (de) 2012-03-28
EP2433014B1 true EP2433014B1 (de) 2019-05-01

Family

ID=42937361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10724699.3A Not-in-force EP2433014B1 (de) 2009-05-20 2010-05-19 Ventilatorschaufel

Country Status (12)

Country Link
US (1) US9869325B2 (da)
EP (1) EP2433014B1 (da)
KR (2) KR20120042749A (da)
CN (1) CN102439320A (da)
AU (1) AU2010251465B2 (da)
DE (1) DE102009022181A1 (da)
DK (1) DK2433014T3 (da)
ES (1) ES2733090T3 (da)
PL (1) PL2433014T3 (da)
PT (1) PT2433014T (da)
TR (1) TR201908892T4 (da)
WO (1) WO2010133354A1 (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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US9965886B2 (en) 2006-12-04 2018-05-08 Arm Norway As Method of and apparatus for processing graphics
GB0900700D0 (en) 2009-01-15 2009-03-04 Advanced Risc Mach Ltd Methods of and apparatus for processing graphics
CN107965468A (zh) * 2017-07-10 2018-04-27 常州信息职业技术学院 一种扇叶叶片结构
USD951427S1 (en) * 2020-07-06 2022-05-10 Gt Karbon Izleme Ve Enerji Verimliligi Sanayi Ticaret Limited Sirketi Ventilator blade
CN117267171A (zh) * 2023-09-19 2023-12-22 首钢股份公司迁安钢铁公司 一种风机、制造及使用方法

Citations (1)

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Publication number Priority date Publication date Assignee Title
GB706076A (en) * 1950-08-29 1954-03-24 L J Wing Mfg Co Improvements in method of forming a hollow fan blade and the apparatus to practice said method

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Also Published As

Publication number Publication date
KR20170081754A (ko) 2017-07-12
TR201908892T4 (tr) 2019-07-22
PT2433014T (pt) 2019-06-04
KR101938349B1 (ko) 2019-01-14
WO2010133354A1 (de) 2010-11-25
AU2010251465B2 (en) 2015-03-12
AU2010251465A1 (en) 2012-01-19
US20120063906A1 (en) 2012-03-15
DE102009022181A1 (de) 2010-11-25
EP2433014A1 (de) 2012-03-28
CN102439320A (zh) 2012-05-02
KR20120042749A (ko) 2012-05-03
DK2433014T3 (da) 2019-07-29
US9869325B2 (en) 2018-01-16
PL2433014T3 (pl) 2019-10-31
ES2733090T3 (es) 2019-11-27

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