EP2906832B1 - Fan guard with twisted rods of polygonal cross-section to reduce karman vortex shedding noise - Google Patents

Fan guard with twisted rods of polygonal cross-section to reduce karman vortex shedding noise Download PDF

Info

Publication number
EP2906832B1
EP2906832B1 EP13765619.5A EP13765619A EP2906832B1 EP 2906832 B1 EP2906832 B1 EP 2906832B1 EP 13765619 A EP13765619 A EP 13765619A EP 2906832 B1 EP2906832 B1 EP 2906832B1
Authority
EP
European Patent Office
Prior art keywords
protective
protective device
protective element
profile
polygon
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.)
Active
Application number
EP13765619.5A
Other languages
German (de)
French (fr)
Other versions
EP2906832A1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2906832A1 publication Critical patent/EP2906832A1/en
Application granted granted Critical
Publication of EP2906832B1 publication Critical patent/EP2906832B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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.
  • Protective devices that are used in particular for ventilation systems are often made up of protective elements arranged concentrically around a center, such as e.g. Lattice rings, formed, which are fixed to support struts and which form a protective space with their interior.
  • the distance (opening) between the protective elements which, as protective constructions, offer a material obstacle that in particular restricts the movement of a human body and / or a part of the body in order to prevent a hazardous area (e.g. a rotating impeller) from being reached, for safety reasons Reasons not to be too big.
  • a hazardous area e.g. a rotating impeller
  • conventional protective devices therefore have a high weight, since a large number of protective elements must be arranged on them.
  • a protective device which is formed from a one-piece injection molded part.
  • a high air throughput 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 Kármán vortex street, can form on the side of the protective element around which the flow flows, and consists of two rows of vortices with opposite directions of rotation.
  • the character of the vortex formation is essentially determined by the Reynolds number, a key figure used in the flow theory for the flow state. If the flow velocity increases or the viscosity of the fluid decreases (e.g. with air compared to water), the Reynolds number increases.
  • the invention and its advantages is defined by claim 1.
  • This device has the advantage that it has at least one protective element which comprises an elongated, twisted profile having a polygon in cross section, the geometric design of the protective element significantly reducing the built-in mass, so that there is a reduction in weight.
  • the geometric design of the protective element if necessary. the detachment of Kármán vertebrae and thus reduce noise.
  • the elongated profile of a protective element is made of solid material.
  • the elongated profile of a protective element is a hollow body (for example a triangular or square tube).
  • the circumferential center of the elongated profile is located on the longitudinal axis of the elongated profile.
  • a protective element has different twist angles and / or different twist continuities.
  • several protective elements have different twist angles and / or different twist continuities.
  • 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 plurality of protective elements arranged at a distance from one another.
  • the distance (opening) that exists between two protective elements thus corresponds to the distance that exists between the two boundaries that delimit the respective protective space.
  • the protective space is limited by the radius.
  • the distance (opening) between two elongated profiles thus corresponds to the distance between their circles.
  • the distance (opening) between the round pipes corresponds to the distance between the outer circumferences.
  • the protective device is designed as a protective grille and / or as a motor suspension. Further advantages and advantageous embodiments of the invention can be found in the following description, the drawing and the claims.
  • Fig. 1 shows a perspective view of a protective device 1 according to the invention in the form of a protective grille which consists of four support struts 2 onto which concentric protective elements 3 in the form of grating rings are welded.
  • Each support strut 2 consists of two parallel flat profiles 4, which are angled twice over the high edge at different angles, the inner ends of which are connected to an inner flange ring 5 and the outer ends of which are connected to an outer flange ring 6.
  • the flat profiles 4 instead of the flat profiles 4, differently shaped profiles, for example round profiles, can also be used.
  • two round struts 7 are arranged in the same division.
  • the protective elements 3 are each connected at their intersection points (joints 8) with the flat profiles 4 and the round struts 7 by welding.
  • the short line contact between protective element 3 and flat profile 4 is also regarded as a crossing point.
  • Fig. 2 and Fig. 3 show front views of an elongated profile 9 of a protective element 3.
  • the elongated profile 9 has a triangular cross-sectional area 10, wherein corner points 11 of the elongated profile 9 are located on a circumference 14 having a circumferential center 12 and a radius 13.
  • the elongated profile 9 which can be a triangular wire, for example, about its longitudinal axis, which is perpendicular to the image plane and extends through the circumferential center 12
  • the protective space formed by the elongated profile 9 increases, so that the initially twisted Condition given protection space, which is given by the edge length of the elongated profile 9, increases to the radius of the circumference 14.
  • the triangular cross-sectional area 10 of the elongated profile 9 is only 41.3% of the area of a full round wire, the circumference of which is through Protection area is defined, corresponds to the radius 14, a material saving of 58.7% is achieved with the same protection area.
  • the elongated profile 9 is shown as a solid material. It would be conceivable that instead of the elongated profile 9 made of solid material, an elongated hollow body (eg a triangular tube) with the same circumference is used. By using an elongated hollow body and twisting it, the material savings could be increased even further.
  • the elongated profile 9 is designed as a star profile, which has a cross-sectional area 10.
  • the corner points 11 of the star profile are located on a circumference 14 having a circumferential center point 12.
  • the Fig. 5 shows a side view of an elongated profile 9 of a protective element 3 and the 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 elongated profile 9, which has a triangular cross-sectional area 10 is twisted about the longitudinal axis 16, as a result of which the protective space is enlarged.
  • Fig. 7 shows a front view of an elongated profile 9 of a protective element 3 according to Fig. 2 with indicated cross-sectional areas 10.
  • the twisting creates a surface structure that reduces the detachment of Kármán vertebrae, so that noise is counteracted.

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)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Schutzvorrichtung, nach der Gattung des Anspruchs 1.The invention relates to a protective device according to the preamble of claim 1.

Schutzvorrichtungen, die insbesondere für lüftungstechnische Anlagen eingesetzt werden, werden häufig aus konzentrisch um einen Mittelpunkt angeordneten Schutzelementen, wie z.B. Gitterringen, gebildet, die an Tragstreben fixiert sind und die mit ihrem Inneren einen Schutzraum bilden. Dabei darf der Abstand (Öffnung) zwischen den Schutzelementen, die als schützende Konstruktionen ein materielles Hindernis bieten, das insbesondere die Bewegung eines menschlichen Körpers und/oder eines Körperteils einschränkt, um das Erreichen eines Gefährdungsbereiches (z.B. ein rotierendes Laufrad) zu verhindern, aus sicherheitstechnischen Gründen nicht zu groß sein. Je nach Durchmesser der Schutzvorrichtung weisen daher herkömmliche Schutzvorrichtungen ein hohes Eigengewicht auf, da an ihnen eine Vielzahl von Schutzelementen angeordnet werden muss.Protective devices that are used in particular for ventilation systems are often made up of protective elements arranged concentrically around a center, such as e.g. Lattice rings, formed, which are fixed to support struts and which form a protective space with their interior. The distance (opening) between the protective elements, which, as protective constructions, offer a material obstacle that in particular restricts the movement of a human body and / or a part of the body in order to prevent a hazardous area (e.g. a rotating impeller) from being reached, for safety reasons Reasons not to be too big. Depending on the diameter of the protective device, conventional protective devices therefore have a high weight, since a large number of protective elements must be arranged on them.

Des Weiteren ist aus der Patentschrift US 2001/0021344 A1 eine Schutzvorrichtung bekannt, die aus einem einstückigen Spritzgussteil gebildet wird.Furthermore, from the patent US 2001/0021344 A1 a protective device is known, which is formed from a one-piece injection molded part.

Bei lüftungstechnischen Anlagen ist es zusätzlich oftmals erstrebenswert, dass sie einen hohen Luftdurchsatz aufweisen. Neben einer Vergrößerung der Lüftereinheit ist ein hoher Luftdurchsatz auch durch die Erhöhung der Strömungsgeschwindigkeit durch Erhöhung der Drehzahl der Lüftereinheit erzielbar. Mit zunehmender Strömungsgeschwindigkeit kann sich aber auf der strömungsabgewandten Seite des umströmten Schutzelementes eine Wirbelstraße, die gemäß ihrem Entdecker als Kármánsche Wirbelstraße bezeichnet wird, bilden, die aus zwei Reihen von Wirbeln mit entgegen gesetztem Drehsinn besteht. Der Charakter der Wirbelbildung wird im Wesentlichen von der Reynolds-Zahl, einer in der Strömungslehre für den Strömungszustand verwendete Kennzahl, bestimmt. Steigt die Strömungsgeschwindigkeit oder sinkt die Viskosität des Fluids (wie z.B. bei Luft im Vergleich zu Wasser) nimmt die Reynolds-Zahl zu. Mit zunehmender Reynolds-Zahl können sich diese Wirbel nicht mehr an dem Körper halten, und es löst sich abwechselnd oben und unten ein Wirbel ab, während sich der Wirbel auf der jeweils anderen Seite neu bildet. Aufgrund dieser abwechselnden Wirbelablösung ändert sich auch die Strömungsrichtung um den Zylinder periodisch. Durch diese Kräfte kann der umströmte Körper selbst zum Schwingen angeregt werden. Je nach Wirbelablösefrequenz kann ein hörbarer Ton entstehen, so dass eine Erhöhung der Strömungsgeschwindigkeit zu einer ungewünschten Geräuschbildung führen kann.In the case of ventilation systems, it is often also desirable that they have a high air throughput. In addition to enlarging the fan unit, a high air throughput can also be achieved by increasing the flow speed by increasing the speed of the fan unit. With increasing flow velocity, however, a vortex street, which according to its discoverer is referred to as Kármán vortex street, can form on the side of the protective element around which the flow flows, and consists of two rows of vortices with opposite directions of rotation. The character of the vortex formation is essentially determined by the Reynolds number, a key figure used in the flow theory for the flow state. If the flow velocity increases or the viscosity of the fluid decreases (e.g. with air compared to water), the Reynolds number increases. As the Reynolds number increases, these vertebrae can no longer adhere to the body, and one vertebra alternates at the top and bottom while the vertebra forms on the other side. Due to this alternating vortex shedding, the direction of flow around the cylinder also changes periodically. These forces can cause the body to flow to vibrate itself. Depending on the vortex shedding frequency, an audible tone may occur, so that an increase in the flow rate can lead to undesired noise.

Um diese Geräuschbildung zu reduzieren wird in der Patentschrift US 6,866,474 B2 eine Schutzvorrichtung für ein Klimasystem vorgeschlagen, die Schutzelemente aufweist, wobei die Schutzelemente eine der Luftströmung zugewandte Kante aufweisen, durch deren Struktur die Ablösung von Kármán-Wirbeln reduziert wird. Nachteilig ist allerdings, dass die Strukturierung der Kante technisch aufwändig ist. Technisch aufwändig ist auch die Schutzvorrichtung, die in der der Offenlegungsschrift JP 2005 351546 A vorgeschlagen wird, da diese einen Gittering aufweist, der mit einer länglichen Rille versehen ist.To reduce this noise generation is in the patent US 6,866,474 B2 proposed a protective device for a climate system, which has protective elements, the protective elements having an edge facing the air flow, the structure of which reduces the detachment of Kármán vortices. However, it is disadvantageous that structuring the edge is technically complex. The protective device described in the published patent application is also technically complex JP 2005 351546 A is proposed because it has a grid ring which is provided with an elongated groove.

Die Erfindung und ihre Vorteile Die erfindungsgemäße Schutzvorrichtung wird von Anspruch 1 definiert. Diese Vorrichtung hat den Vorteil, dass sie mindestens ein Schutzelement, das ein längliches, im Querschnitt ein Polygon aufweisendes, verdrilltes Profil umfasst, aufweist, wobei die geometrische Gestaltung des Schutzelementes die verbaute Masse deutlich reduziert, so dass es zu einer Gewichtsreduzierung kommt. Zusätzlich kann die geometrische Gestaltung des Schutzelementes ggfls. die Ablösung von Kármán-Wirbeln und damit die Geräuschentwicklung reduzieren.
Nach einer vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung ist das längliche Profil eines Schutzelementes aus Vollmaterial.
Nach einer zusätzlichen vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung ist das längliche Profil eines Schutzelementes ein Hohlkörper (z.B. ein dreieckiges oder viereckiges Rohr).
Nach einer zusätzlichen vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung befindet sich der Umkreismittelpunkt des länglichen Profils auf der Längsachse des länglichen Profils.
Nach einer zusätzlichen vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung weist ein Schutzelement unterschiedliche Verdrillwinkel und/oder unterschiedliche Verdrillstetigkeiten auf.
Nach einer zusätzlichen vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung weisen mehrere Schutzelemente unterschiedliche Verdrillwinkel und/oder unterschiedliche Verdrillstetigkeiten auf.The invention and its advantages The protective device according to the invention is defined by claim 1. This device has the advantage that it has at least one protective element which comprises an elongated, twisted profile having a polygon in cross section, the geometric design of the protective element significantly reducing the built-in mass, so that there is a reduction in weight. In addition, the geometric design of the protective element, if necessary. the detachment of Kármán vertebrae and thus reduce noise.
According to an advantageous embodiment of the protective device according to the invention, the elongated profile of a protective element is made of solid material.
According to an additional advantageous embodiment of the protective device according to the invention, the elongated profile of a protective element is a hollow body (for example a triangular or square tube).
According to an additional advantageous embodiment of the protective device according to the invention, the circumferential center of the elongated profile is located on the longitudinal axis of the elongated profile.
According to an additional advantageous embodiment of the protective device according to the invention, a protective element has different twist angles and / or different twist continuities.
According to an additional advantageous embodiment of the protective device according to the invention, several protective elements have different twist angles and / or different twist continuities.

Nach einer vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung ist das Polygon ein Dreieck, Viereck, Vieleck oder ein Sternprofil.
Nach einer diesbezüglichen vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung ist das Dreieck ein gleichseitiges Dreieck oder das Vieleck ein regelmäßiges Vieleck.According to an advantageous embodiment of the protective device according to the invention, the polygon is a triangle, quadrangle, polygon or a star profile.
According to an advantageous embodiment of the protective device according to the invention, the triangle is an equilateral triangle or the polygon is a regular polygon.

Nach einer zusätzlichen vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung weist die Schutzvorrichtung mehrere zueinander beabstandet angeordnete Schutzelemente auf. Somit entspricht der Abstand (Öffnung), der zwischen zwei Schutzelementen vorhanden ist, dem Abstand, der zwischen den beiden den jeweiligen Schutzraum begrenzenden Begrenzungen vorhanden ist. Bei einem verdrillten länglichen Profil, das auf einem Umkreis liegende Eckpunkte aufweist, wird der Schutzraum durch den Umkreis begrenzt. Somit entspricht der Abstand (Öffnung) zwischen zwei länglichen Profilen dem Abstand zwischen deren Umkreisen. Bei unverdrillten Rundrohren, deren Schutzraum durch den Außenumfang des Rundrohres begrenzt wird, entspricht der Abstand (Öffnung) zwischen den Rundrohren dem Abstand zwischen den Außenumfängen.According to an additional advantageous embodiment of the protective device according to the invention, the protective device has a plurality of protective elements arranged at a distance from one another. The distance (opening) that exists between two protective elements thus corresponds to the distance that exists between the two boundaries that delimit the respective protective space. In the case of a twisted, elongated profile which has corner points lying in a radius, the protective space is limited by the radius. The distance (opening) between two elongated profiles thus corresponds to the distance between their circles. In the case of untwisted round pipes, the protective space of which is limited by the outer circumference of the round pipe, the distance (opening) between the round pipes corresponds to the distance between the outer circumferences.

Nach einer zusätzlichen vorteilhaften Ausgestaltung der erfindungsgemäßen Schutzvorrichtung ist die Schutzvorrichtung als Schutzgitter und/oder als Motoraufhängung ausgebildet.
Weitere Vorteile und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.According to an additional advantageous embodiment of the protective device according to the invention, the protective device is designed as a protective grille and / or as a motor suspension.
Further advantages and advantageous embodiments of the invention can be found in the following description, the drawing and the claims.

Zeichnungdrawing

Ausführungsbeispiele des Gegenstandes der Erfindung sind in der Zeichnung dargestellt und werden im Folgenden näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Ansicht einer erfindungsgemäßen Schutzvorrichtung in Form eines Schutzgitters,
Fig. 2 und 3
eine Frontansicht auf ein längliches Profil eines Schutzelementes,
Fig. 4
eine Frontansicht auf ein anderes längliches Profil eines Schutzelementes, das nicht Teil der Erfindung ist,
Fig. 5
eine Seitenansicht auf ein längliches Profil eines Schutzelementes gemäß Fig. 2;
Fig. 6
eine Seitenansicht auf ein längliches Profil eines Schutzelementes gemäß Fig. 2 mit angedeuteten Querschnittsflächen und
Fig. 7
eine Frontansicht auf ein längliches Profil eines Schutzelementes gemäß Fig. 2 mit angedeuteten Querschnittsflächen.
Exemplary embodiments of the subject matter of the invention are shown in the drawing and are explained in more detail below. Show it:
Fig. 1
2 shows a perspective view of a protective device according to the invention in the form of a protective grille,
2 and 3
a front view of an elongated profile of a protective element,
Fig. 4
2 shows a front view of another elongated profile of a protective element which is not part of the invention,
Fig. 5
a side view of an elongated profile of a protective element according to Fig. 2 ;
Fig. 6
a side view of an elongated profile of a protective element according to Fig. 2 with indicated cross-sectional areas and
Fig. 7
a front view of an elongated profile of a protective element according Fig. 2 with indicated cross-sectional areas.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Fig. 1 zeigt eine perspektivische Ansicht einer erfindungsgemäßen Schutzvorrichtung 1 in Form eines Schutzgitters, das aus vier Tragstreben 2 besteht, auf die konzentrische Schutzelemente 3 in Form von Gitterringen aufgeschweißt sind. Jede Tragstrebe 2 besteht aus zwei parallel geführten, zweimal über die hohe Kante mit unterschiedlichen Winkeln abgewinkelten Flachprofilen 4, deren innere Enden mit einem inneren Flanschring 5 und deren äußere Enden zu einem äußeren Flanschring 6 miteinander verbunden sind. Selbstverständlich können anstatt der Flachprofile 4 auch anders gestaltete Profile, beispielsweise Rundprofile, eingesetzt werden. Zwischen den Tragstreben 2 sind in gleicher Teilung jeweils zwei Rundstreben 7 angeordnet. Die Schutzelemente 3 sind jeweils an ihren Kreuzungspunkten (Fügestellen 8) mit den Flachprofilen 4 und den Rundstreben 7 durch Schweißen miteinander verbunden. Der Einfachheit halber wird auch die kurze Linienberührung zwischen Schutzelement 3 und Flachprofil 4 als ein Kreuzungspunkt angesehen. Fig. 1 shows a perspective view of a protective device 1 according to the invention in the form of a protective grille which consists of four support struts 2 onto which concentric protective elements 3 in the form of grating rings are welded. Each support strut 2 consists of two parallel flat profiles 4, which are angled twice over the high edge at different angles, the inner ends of which are connected to an inner flange ring 5 and the outer ends of which are connected to an outer flange ring 6. Of course, instead of the flat profiles 4, differently shaped profiles, for example round profiles, can also be used. Between the support struts 2, two round struts 7 are arranged in the same division. The protective elements 3 are each connected at their intersection points (joints 8) with the flat profiles 4 and the round struts 7 by welding. For the sake of simplicity, the short line contact between protective element 3 and flat profile 4 is also regarded as a crossing point.

Fig. 2 und Fig. 3 zeigen Frontansichten auf ein längliches Profil 9 eines Schutzelementes 3. Das längliche Profil 9 weist eine dreieckige Querschnittsfläche 10 auf, wobei sich Eckpunkte 11 des länglichen Profils 9 auf einem einen Umkreismittelpunkt 12 und einen Radius 13 aufweisenden Umkreis 14 befinden. Durch Verdrillung des länglichen Profils 9, das beispielsweise ein dreieckiger Draht sein kann, um seine Längsachse, die senkrecht auf der Bildebene steht und durch den Umkreismittelpunkt 12 verläuft, vergrößert sich der durch das längliche Profil 9 gebildete Schutzraum, so dass sich der anfänglich im unverdrillten Zustand gegebene Schutzraum, der durch die Kantenlänge des länglichen Profils 9 gegeben ist, vergrößert auf den Radius des Umkreises 14. Da die dreieckige Querschnittsfläche 10 des länglichen Profils 9 lediglich 41,3 % der Fläche eines vollen Rundrahtes beträgt, dessen Umfang, durch den sein Schutzraum festgelegt wird, dem Umkreis 14 entspricht, wird bei gleichem Schutzraum eine Materialeinsparung von 58,7 % erzielt.
In Fig. 2 und Fig. 3 ist das längliche Profil 9 als Vollmaterial dargestellt. Denkbar wäre, dass anstatt des aus Vollmaterial bestehenden länglichen Profils 9 ein den gleichen Umfang aufweisender länglicher Hohlkörper (z.B. ein dreieckiges Rohr) eingesetzt wird. Durch den Einsatz eines länglichen Hohlkörpers und durch dessen Verdrillung könnte die Materialeinsparung noch weiter erhöht werden.
Fig. 4 zeigt eine Frontansicht auf ein anderes längliches Profil 9 eines Schutzelementes 3, das jedoch nicht Teil der Erfindung ist. Das längliche Profil 9 ist als Sternprofil ausgestaltet, das eine Querschnittsfläche 10 aufweist. Die Eckpunkte 11 des Sternprofils befinden sich auf einem einen Umkreismittelpunkt 12 aufweisenden Umkreis 14. Durch Verdrillung des Sternprofils um seine Längsachse, die senkrecht auf der Bildebene steht und durch den Umkreismittelpunkt 12 verläuft, vergrößert sich der durch das Sternprofil gebildete Schutzraum, so dass der anfänglich im unverdrillten Zustand gegebene Schutzraum, der der Querschnittsfläche 10 entsprach, nun durch die Kreisfläche 15 des Umkreises 14 gegeben ist. Fig. 2 and Fig. 3 show front views of an elongated profile 9 of a protective element 3. The elongated profile 9 has a triangular cross-sectional area 10, wherein corner points 11 of the elongated profile 9 are located on a circumference 14 having a circumferential center 12 and a radius 13. By twisting the elongated profile 9, which can be a triangular wire, for example, about its longitudinal axis, which is perpendicular to the image plane and extends through the circumferential center 12, the protective space formed by the elongated profile 9 increases, so that the initially twisted Condition given protection space, which is given by the edge length of the elongated profile 9, increases to the radius of the circumference 14. Since the triangular cross-sectional area 10 of the elongated profile 9 is only 41.3% of the area of a full round wire, the circumference of which is through Protection area is defined, corresponds to the radius 14, a material saving of 58.7% is achieved with the same protection area.
In Fig. 2 and Fig. 3 the elongated profile 9 is shown as a solid material. It would be conceivable that instead of the elongated profile 9 made of solid material, an elongated hollow body (eg a triangular tube) with the same circumference is used. By using an elongated hollow body and twisting it, the material savings could be increased even further.
Fig. 4 shows a front view of another elongated profile 9 of a protective element 3, which is not part of the invention. The elongated profile 9 is designed as a star profile, which has a cross-sectional area 10. The corner points 11 of the star profile are located on a circumference 14 having a circumferential center point 12. By twisting the star profile around its longitudinal axis, which is perpendicular to the image plane and runs through the circumferential center point 12, the protective space formed by the star profile increases, so that it initially Protection area given in the untwisted state, which corresponded to the cross-sectional area 10, is now given by the circular area 15 of the circumference 14.

Da die Querschnittsfläche 10 des Sternprofils lediglich einen Bruchteil der Fläche eines vollen Rundrahtes beträgt, dessen Umfang, durch den sein Schutzraum festgelegt wird, dem Umkreis 14 entspricht, wird bei gleicher Fläche des Schutzraumes eine Materialeinsparung erzielt.
Die Fig. 5 zeigt eine Seitenansicht eines länglichen Profils 9 eines Schutzelementes 3 und die Fig. 6 zeigt eine perspektivische Ansicht auf ein längliches Profil 9 eines Schutzelementes 3 gemäß Fig. 2 mit angedeuteten Querschnittsflächen 10. Das längliche Profil 9, das eine dreieckige Querschnittsfläche 10 aufweist, ist um die Längsachse 16 verdrillt, wodurch der Schutzraum vergrößert wird.
Fig. 7 zeigt eine Frontansicht auf ein längliches Profil 9 eines Schutzelementes 3 gemäß Fig. 2 mit angedeuteten Querschnittsflächen 10.
Zusätzlich wird durch die Verdrillung eine Oberflächenstruktur geschaffen, durch die die Ablösung von Kármán-Wirbeln reduziert wird, so dass einer Geräuschbildung entgegen gewirkt wird.Since the cross-sectional area 10 of the star profile is only a fraction of the area of a full round wire, the circumference of which defines its protective area corresponds to the circumference 14, material savings are achieved with the same area of the protective area.
The Fig. 5 shows a side view of an elongated profile 9 of a protective element 3 and the 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 elongated profile 9, which has a triangular cross-sectional area 10, is twisted about the longitudinal axis 16, as a result of which the protective space is enlarged.
Fig. 7 shows a front view of an elongated profile 9 of a protective element 3 according to Fig. 2 with indicated cross-sectional areas 10.
In addition, the twisting creates a surface structure that reduces the detachment of Kármán vertebrae, so that noise is counteracted.

BezugszahlenlisteList of reference numbers

11
SchutzvorrichtungProtection device
22nd
TragstrebeSupport strut
33rd
GitterringLattice ring
44th
FlachprofilFlat profile
55
Innerer FlanschringInner flange ring
66
Äußerer FlanschringOuter flange ring
77
RundstrebeRound strut
88th
FügestelleJoint
99
Längliches ProfilElongated profile
1010th
QuerschnittsflächeCross sectional area
1111
EckpunktCorner point
1212th
UmkreismittelpunktCenter of radius
1313
Radiusradius
1414
UmkreisRadius
1515
KreisflächeCircular area
1616
LängsachseLongitudinal axis

Claims (9)

  1. A protective device (1) for a ventilation system,
    - with at least one supporting brace (2),
    - with at least one protective element (3) and
    - with a protective space formed by the protective element (3),
    wherein at least one protective element (3) is connected to at least one supporting brace (2) in at least one intersecting point,
    wherein the protective device (1) has a center, about which the at least one protective element (3) is arranged spirally and/or at least one protective element (3) is arranged annularly,
    wherein at least one protective element (3) is realized in the form of an elongate profile (9), the cross section of which is a polygon and has at least two corners (11) that are located on a circumcircle (14) having a circumcenter (12), with said elongate profile being twisted about its longitudinal axis in order to form a protective space, and
    wherein this twisted protective element is welded on the supporting brace (2).
  2. The protective device (1) according to claim 1, characterized in that the elongate profile (9) of the protective element (3) is made of solid material.
  3. The protective device (1) according to claim 1, characterized in that the elongate profile (9) of the protective element (3) is a hollow body.
  4. The protective device (1) according to one of the preceding claims, characterized in that the protective element (3) has different twisting angles and/or different twisting continuities.
  5. The protective device (1) according to one of the preceding claims, characterized in that multiple protective elements (3) have different twisting angles and/or different twisting continuities.
  6. The protective device (1) according to one of the preceding claims, characterized in that the polygon is a triangle, a quadrangle, a polygon or a star profile.
  7. The protective device (1) according to claim 6, characterized in that the triangle is an equilateral triangle or the polygon is a regular polygon.
  8. The protective device (1) according to one of the preceding claims, characterized in that the protective device (1) has multiple protective elements (3), which are spaced apart from one another.
  9. The protective device (1) according to one of the preceding claims, characterized in that the protective device (1) is realized in the form of a protective screen and/or in the form of a motor suspension.
EP13765619.5A 2012-10-11 2013-08-06 Fan guard with twisted rods of polygonal cross-section to reduce karman vortex shedding noise Active EP2906832B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012020245.8A DE102012020245B4 (en) 2012-10-11 2012-10-11 guard
PCT/DE2013/000438 WO2014056467A1 (en) 2012-10-11 2013-08-06 Protective grid for fan comprising twisted rods having a polygonal cross-section for reducing karman vortex separation noise

Publications (2)

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

Family

ID=49225981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13765619.5A Active EP2906832B1 (en) 2012-10-11 2013-08-06 Fan guard with twisted rods of polygonal cross-section to reduce karman vortex shedding noise

Country Status (4)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190368753A1 (en) * 2017-02-23 2019-12-05 Mitsubishi Electric Corporation Outdoor unit for air-conditioning apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004006011U1 (en) * 2004-04-16 2004-08-19 Rödel, Günter Cooling system for domestic fan has a compressor in the stand to pump cooling fluid through narrow metal pipes forming the protective screen over the fan blades

Family Cites Families (8)

* 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 (en) * 2000-03-10 2006-02-01 株式会社丸山製作所 Centrifugal blower and portable work machine
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
JP4253618B2 (en) * 2004-06-10 2009-04-15 ヤンマー株式会社 Fan guard
JP2009085562A (en) * 2007-10-03 2009-04-23 Yanmar Co Ltd Fan guard
DE102009025025A1 (en) * 2008-06-12 2009-12-17 Stadtmüller, Uwe Spatial protective grille for axial fans and method for producing the protective grille

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004006011U1 (en) * 2004-04-16 2004-08-19 Rödel, Günter Cooling system for domestic fan has a compressor in the stand to pump cooling fluid through narrow metal pipes forming the protective screen over the fan blades

Also Published As

Publication number Publication date
DE102012020245B4 (en) 2015-01-15
EP2906832A1 (en) 2015-08-19
DE102012020245A1 (en) 2014-04-17
WO2014056467A1 (en) 2014-04-17
HUE050270T2 (en) 2020-11-30

Similar Documents

Publication Publication Date Title
DE102012112415B4 (en) Transition body for arrangement between differently executed sections of a wind turbine tower and wind turbine tower with such a transition body
EP2815130B1 (en) Diffusor, ventilator having such a diffusor, and device having such ventilators
EP2525128B1 (en) Transition piece
EP3298284B1 (en) Flat flow-conducting grille
EP3215745A1 (en) Protective grille with improved efficiency and noise characteristics
DE102011121025A1 (en) Motor suspension for fans, preferably axial fans, and method for producing a ventilation grille of such engine mount
EP2195530B1 (en) Pole construction for framework towers of wind power plants
EP2455305A1 (en) Silo
EP3377190B1 (en) Filter disc
DE102012020245B4 (en) guard
EP3268654B1 (en) Damping device
EP2520872B1 (en) Solar tower power plant - solar receiver
DE102015003859A1 (en) blowouts
EP2513389A1 (en) Telescopic structural support
AT507013B1 (en) MAST FOR A WIND ENERGY SYSTEM EQUIPPED WITH A DARRIEUS ROTOR
DE202014103877U1 (en) Protective grille for a fan
DE102009038743A1 (en) Peeling disc of a centrifuge
EP4341513A1 (en) Spindle strut
EP1457263B1 (en) Skimmer disk for a centrifuge
DE4243932C2 (en) Protective grille for free-flowing channels
EP3896234A1 (en) Fitting assembly
WO2025045728A1 (en) Device for reducing vortex-induced vibrations of a body around which fluid flows
EP3032133B1 (en) Folding bellows air spring having a spacer ring
WO2000076890A1 (en) Elbow element
DE102011077938B4 (en) Steam sieve arrangement and use of a steam sieve arrangement

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150507

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180409

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20191209

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502013014465

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1246206

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200415

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200618

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200619

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200618

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200718

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200812

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: HU

Ref legal event code: AG4A

Ref document number: E050270

Country of ref document: HU

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502013014465

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

26N No opposition filed

Effective date: 20201221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502013014465

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200831

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200806

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210302

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200831

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200806

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200806

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1246206

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200318

REG Reference to a national code

Ref country code: HU

Ref legal event code: GB9C

Owner name: EBM-PAPST MULFINGEN GMBH & CO.KG, DE

Free format text: FORMER OWNER(S): STADTMUELLER, UWE, DE

Ref country code: HU

Ref legal event code: FH1C

Free format text: FORMER REPRESENTATIVE(S): DANUBIA SZABADALMI ES JOGI IRODA KFT., HU

Representative=s name: DANUBIA SZABADALMI ES JOGI IRODA KFT., HU

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: HU

Payment date: 20250804

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20250829

Year of fee payment: 13