EP2906832A1 - Grille de protection de ventilateur dotée de barres torsadées de section polygonale pour réduire le bruit dû aux tourbillons de karman - Google Patents

Grille de protection de ventilateur dotée de barres torsadées de section polygonale pour réduire le bruit dû aux tourbillons de karman

Info

Publication number
EP2906832A1
EP2906832A1 EP13765619.5A EP13765619A EP2906832A1 EP 2906832 A1 EP2906832 A1 EP 2906832A1 EP 13765619 A EP13765619 A EP 13765619A EP 2906832 A1 EP2906832 A1 EP 2906832A1
Authority
EP
European Patent Office
Prior art keywords
protective
protection device
protective element
profile
cross
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
Application number
EP13765619.5A
Other languages
German (de)
English (en)
Other versions
EP2906832B1 (fr
Inventor
Uwe Stadtmüller
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.)
Stadtmueller Uwe
Original Assignee
Stadtmueller Uwe
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 Stadtmueller Uwe filed Critical Stadtmueller Uwe
Publication of EP2906832A1 publication Critical patent/EP2906832A1/fr
Application granted granted Critical
Publication of EP2906832B1 publication Critical patent/EP2906832B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the invention relates to a protective device, according to the preamble of claim 1.
  • Safety devices which are used in particular for ventilation systems are often made of concentrically arranged around a center protection elements, such as. Grid rings, formed, which are fixed to support struts and form a shelter with their interior.
  • a center protection elements such as. Grid rings, formed, which are fixed to support struts and form a shelter with their interior.
  • the distance (opening) between the protective elements which provide a material obstacle as protective structures, which restricts, in particular, the movement of a human body and / or a body part, in order to prevent the reaching of a hazardous area (eg a rotating impeller), from safety-related Reasons not to be too big.
  • a hazardous area eg a rotating impeller
  • a high air flow rate can also be achieved by increasing the flow speed by increasing the speed of the fan unit.
  • a vortex street which according to its discoverer is referred to as the Karman vortex street, can form on the downstream side of the protective element flowed around, which consists of two rows of vertebrae with opposite directions of rotation.
  • the nature of vortex formation is essentially determined by the Reynolds number, a measure used in fluid flow mechanics. If the flow velocity increases or the viscosity of the fluid decreases (as in the case of air compared to water), the Reynolds number increases.
  • US Pat. No. 6,866,474 B2 proposes a protective device for an air conditioning system which has protective elements, wherein the protective elements have an edge facing the air flow, through the structure of which the detachment of Karman vertebrae is reduced.
  • the structuring of the edge is technically complex.
  • the protective device according to the invention in particular for a ventilation system, with the characterizing features of claim 1, has the advantage that it has at least one protective element which has an elongated, in cross-section a polygon, twisted profile or is a round tube, wherein the geometric design of the protective element significantly reduces the built-in mass, resulting in a weight reduction.
  • the geometric design of the protective element ggfls. the detachment of Kärmän vertebrae and thus reduce the noise.
  • the elongated profile of a protective element made of solid material.
  • the elongate profile of a protective element is a hollow body (for example a triangular or quadrangular tube).
  • the circumferential center of the elongated profile is located on the longitudinal axis of the elongated profile.
  • a protective element on different Verdrillwinkel and / or different Verdrillstetmaschineen is located on different Verdrillwinkel and / or different Verdrillstetmaschineen.
  • a plurality of protective elements have different twist angles and / or different twisting properties.
  • the cross section of an elongate profile is a polygon.
  • the polygon is a triangle, quadrangle, polygon or a star profile.
  • the triangle is an equilateral triangle or the polygon is a regular polygon.
  • the protective device has a center around which at least one protective element is arranged in a spiral shape and / or at least one protective element in an annular manner.
  • the protection device has several on spaced apart arranged protective elements.
  • the distance (opening) that exists between two protective elements corresponds to the distance that exists between the two limits limiting the respective protective space.
  • the shelter In a twisted elongated profile having corner points lying on a perimeter, the shelter is bounded by the perimeter.
  • the distance (opening) between two elongated profiles corresponds to the distance between their orbits.
  • the distance (opening) between the round pipes corresponds to the distance between the outer peripheries.
  • the protective device has at least one support strut.
  • At least one protective element is connected to a support strut.
  • the protective device is designed as a protective grid and / or as a motor suspension.
  • FIG. 1 is a perspective view of a protective device according to the invention in the form of a protective grid
  • 2 and 3 is a front view of an elongated profile of a
  • FIG. 4 is a front view of another elongated profile of a protective element
  • Fig. 5 is a side view of an elongated profile of a
  • Fig. 6 is a side view of an elongated profile of a
  • FIG. 7 is a front view of an elongate profile of a
  • Fig. 1 shows a perspective view of a protective device 1 according to the invention in the form of a protective grid, which consists of four support struts 2, are fixed to the concentric protective elements 3 in the form of lattice rings (preferably welded).
  • Each support strut 2 consists of two parallel guided, twice over the high edge with different angles angled flat sections 4, the inner ends are connected to an inner flange 5 and the outer ends to an outer flange 6 together.
  • the flat sections 4 instead of the flat sections 4 also differently shaped profiles, such as round profiles, can be used.
  • two round struts 7 are arranged in the same pitch.
  • the protective elements 3 are preferably connected to each other at their intersection points (joints 8) with the flat sections 4 and the round bars 7 by welding.
  • the short line contact between the protective element 3 and the flat profile 4 is also regarded as a crossing point.
  • the elongate profile 9 has a triangular cross-sectional area 10, with corner points 11 of the elongate profile 9 being located on a circumference 14 having a circumferential center 12 and a radius 13 ,
  • the elongate profile 9 which may be a triangular wire, for example, about its longitudinal axis, which is perpendicular to the image plane and passes through the circumference center 12
  • the shelter formed by the elongated profile 9 increases, so that the initially in untwisted Condition given shelter, the is given by the edge length of the elongated profile 9, increased to the radius of the circumference 14.
  • the elongated profile 9 is shown as a solid material. It would be conceivable that, instead of the elongate profile 9 made of solid material, an elongated hollow body (for example a triangular tube) having the same circumference would be used. By using an elongated hollow body and / or by twisting the material savings could be further increased.
  • the elongated profile 9 is designed as a star profile which has a cross-sectional area 10.
  • the shelter formed by the star profile increases, so that the initial In the untwisted state given shelter, which corresponded to the cross-sectional area 10, is now given by the circular area 15 of the circumference 14. Since the cross-sectional area 10 of the star profile is only a fraction of the area of a solid round wire whose circumference, by which its shelter is determined, corresponds to the perimeter 14, material savings are achieved for the same area of the shelter.
  • FIG. 5 shows a side view of an elongated profile 9 of a protective element 3
  • FIG. 6 shows a perspective view of an elongated profile 9 of a protective element 3 according to FIG. 2 with indicated cross-sectional areas 10.
  • the elongate profile 9, which has a triangular cross-sectional area 10 is twisted about the longitudinal axis 16, whereby the shelter is increased.
  • FIG. 7 shows a front view of an elongate profile 9 of a protective element 3 according to FIG. 2 with indicated cross-sectional areas 10.
  • twisting creates a surface structure that reduces the separation of carm n-vortices, thus counteracting noise.

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)
  • Prostheses (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
EP13765619.5A 2012-10-11 2013-08-06 Grille de ventilateur avec barreaux torsadés de section polygonale pour réduire le bruit dû au décollement de tourbillons de type karman Active EP2906832B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012020245.8A DE102012020245B4 (de) 2012-10-11 2012-10-11 Schutzvorrichtung
PCT/DE2013/000438 WO2014056467A1 (fr) 2012-10-11 2013-08-06 Grille de protection de ventilateur dotée de barres torsadées de section polygonale pour réduire le bruit dû aux tourbillons de karman

Publications (2)

Publication Number Publication Date
EP2906832A1 true EP2906832A1 (fr) 2015-08-19
EP2906832B1 EP2906832B1 (fr) 2020-03-18

Family

ID=49225981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13765619.5A Active EP2906832B1 (fr) 2012-10-11 2013-08-06 Grille de ventilateur avec barreaux torsadés de section polygonale pour réduire le bruit dû au décollement de tourbillons de type karman

Country Status (4)

Country Link
EP (1) EP2906832B1 (fr)
DE (1) DE102012020245B4 (fr)
HU (1) HUE050270T2 (fr)
WO (1) WO2014056467A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018154686A1 (fr) * 2017-02-23 2018-08-30 三菱電機株式会社 Unité d'extérieur pour climatiseur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5214244A (en) * 1988-10-28 1993-05-25 Science Applications International Corporation Strumming resistant cable
US5259726A (en) * 1992-06-26 1993-11-09 Storage Technology Corporation Rotating fan guard
JP3741255B2 (ja) * 2000-03-10 2006-02-01 株式会社丸山製作所 遠心送風機及び携帯型作業機
US6470700B1 (en) * 2002-01-24 2002-10-29 Carrier Corporation Reduced noise grill
US6866474B2 (en) 2003-01-27 2005-03-15 Lennox Industries, Inc. Noise reduction by vortex suppression in air flow systems
DE202004006011U1 (de) * 2004-04-16 2004-08-19 Rödel, Günter Haushaltsventilator mit Kühlaggregat über das Schutzgitter
JP4253618B2 (ja) * 2004-06-10 2009-04-15 ヤンマー株式会社 ファンガード
JP2009085562A (ja) * 2007-10-03 2009-04-23 Yanmar Co Ltd ファンガード
EP2133574A3 (fr) * 2008-06-12 2013-05-08 Uwe Stadtmüller Grille de protection spatiale pour ventilateurs axiaux et procédé de fabrication de la grille de protection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014056467A1 *

Also Published As

Publication number Publication date
DE102012020245B4 (de) 2015-01-15
EP2906832B1 (fr) 2020-03-18
WO2014056467A1 (fr) 2014-04-17
HUE050270T2 (hu) 2020-11-30
DE102012020245A1 (de) 2014-04-17

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