EP2410187B1 - Agencement de grille de protection pour ventilateurs - Google Patents

Agencement de grille de protection pour ventilateurs Download PDF

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Publication number
EP2410187B1
EP2410187B1 EP20110170176 EP11170176A EP2410187B1 EP 2410187 B1 EP2410187 B1 EP 2410187B1 EP 20110170176 EP20110170176 EP 20110170176 EP 11170176 A EP11170176 A EP 11170176A EP 2410187 B1 EP2410187 B1 EP 2410187B1
Authority
EP
European Patent Office
Prior art keywords
locking
protective grille
protective
passage opening
arrangement according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20110170176
Other languages
German (de)
English (en)
Other versions
EP2410187A1 (fr
Inventor
Thomas Heli
Alfred Korwin
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.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen 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 Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP2410187A1 publication Critical patent/EP2410187A1/fr
Application granted granted Critical
Publication of EP2410187B1 publication Critical patent/EP2410187B1/fr
Active 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
    • F04D29/70—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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

Definitions

  • the present invention relates to a protective grid arrangement for a fan, consisting of a rotating fan vorrad or nachordnenden cover with an air passage opening and a closing in the region of the passage opening for contact protection with the cover over several distributed over the circumference arranged detent connections or connectable protective grid.
  • the publication DE 20 2008 002 356 U1 describes various embodiments of a compact fan with a protective grid arrangement of the generic type described above.
  • the known compact fan has as cover a front panel with an air inlet opening, which is covered with a protective grid to protect against contact with the rotating fan parts or can be covered.
  • the protective grid can be locked by means of a clip connection with the front panel.
  • the protective grid in a first embodiment on its outer edge axially projecting locking elements which can be latched with locking lugs of the front panel.
  • the guard meshes only slightly with the axially protruding latching elements in the opening area, so that the grid itself protrudes significantly above the opening plane.
  • the attachment is solely dependent on the spring elasticity of the axially projecting locking elements.
  • the protective grid in another embodiment may also be integrally formed with the front panel and then also lie approximately in the opening plane.
  • a very similar grid arrangement is in the document US 2004/0033131 A1 described, however, no locking lugs are provided in the passage opening of the cover. Instead, the self-elastically deformable latching elements (tabs) of the protective grille (fan grill), which engage here in the manner of tongues or lugs, engage under the inner opening edge of the passage opening, wherein support ribs are provided in the upper and outer opening regions of the passage opening widening like a nozzle are based on the opening edge.
  • the protective grid is thus held in that the opening edge of the passage opening sits axially between the latching elements and the abutment ribs of the protective grid.
  • Each locking element is located in the region of the outer, radial end of a radial strut, which extends radially inwardly to the middle part of the protective grid.
  • the protective grid is designed so as to be elastically deformable such that each latching element for latching and releasing the latching connection can be moved under zone-wise, elastic deformation of the protective grid radially relative to the inner edge of the passage opening.
  • the locking element is bent itself (paragraph 0027, "bending the tabs 30").
  • the present invention is based on the object to improve a protective grid arrangement of the type described so that a safe and in particular play-free snap-fastening of the protective grid is ensured in the passage opening of the cover without protrusion of the protective grid.
  • the protective grid should be easy and quick to install and in particular also be solvable.
  • the invention provides that the locking elements are arranged on the outer edge of the protective grid in the lattice plane only pointing radially outward, wherein the protective grid in the region of each latching element is designed elastically deformable such that each latching element for latching and releasing the latching connection under regionally elastic deformation of Protective grid is movable radially relative to the associated locking projection.
  • this allows the protective grid to be inserted axially into the mouth region of the passage opening, wherein the axial insertion movement, the individual locking connections can be locked by axial, manual pressing, with the locking elements each in their entirety and without their own elastic deformation only under deformation of the adjacent protective grid Move radially radially and then engage the locking lugs form-locking detent radially outward.
  • a loosening of the locking connections is advantageously possible with the reverse direction of movement by manually in the region of each locking element, a radially inwardly acting release force is applied by the locking element to release the positive locking connection can move radially inward. In this way, the individual latching connections can be successively solved until the entire protective grid is released.
  • the invention achieves important advantages, in particular a very good and secure support by a correspondingly high radial spring force in the region of individual locking elements, wherein the height of this spring force can be specified by the material and shape-dependent deformation properties of the protective grid. Due to the recessed arrangement of the protective grille in the mouth region of the passage opening in combination with the configuration of the snap connections flow-favorable properties are also achieved, but especially for applications without protective grid, because the passage opening is designed almost without protruding parts.
  • the protective grid seen in the circumferential direction between each two adjacent locking elements on a radial support portion with an end-side contact contour for radial and axial contact on an opening edge of the passage opening of the cover.
  • the support sections are axially and radially free of play with an elastic contact force on the opening edge of the passage opening.
  • This elastic contact force is also effected by a partially elastic deformation of the protective grid itself by the support sections first come into contact when inserting the protective grid, and only after further impressions under elastic deformation of the protective grid, the latching of the locking elements with the associated locking lugs.
  • a backlash is achieved by elastic bias, which disturbing noise (vibrations) can be avoided during operation.
  • a protective grid arrangement according to the invention 1 consists of a cover 2 with a particular circular air passage opening 4.
  • the cover 2 is preceded by a rotating fan, not shown, wherein the passage opening 4 forms an air inlet for the air sucked by the fan.
  • the cover 2 are also arranged downstream of a fan, wherein the passage opening 4 would form a blowout.
  • the impeller not shown, can be designed as axial fan, radial fan or diagonal fan.
  • a protective grid 6 can be fastened to the cover part 2 in the region of the passage opening 4.
  • a plurality of, in particular at least three circumferentially spaced latching connections 8 are provided.
  • Each of these latching connections 8 consists of a latching lug 10 fixedly arranged in the region of the passage opening 4 and a latching element 12 arranged on the protective lattice 6.
  • the locking elements 12 do not protrude axially from the protective grid 6, but are practically arranged on the outer edge of the protective grid 6 in the lattice plane.
  • the term "lattice plane” does not mean that the entire protective grid 6 must lie exactly in one plane, but rather the protective grid 6 can also be a lattice shape curved overall slightly convexly outwards. It is only essential that the locking elements 12 are arranged facing away from the outer edge of the protective grid 6 only radially outward.
  • the protective grid 6 is formed so resiliently deformable at least in the region of each locking element 12, that each locking element 12 for locking or releasing the locking connection 8 under regional elastic deformation of the protective grid 6, but without its own elastic deformation, radially relative to the associated locking projection 10 is movable. This radial movement is in Fig. 2 and 3 each illustrated by a double arrow 14.
  • the preferably circular passage opening 4 of the cover part 2 is preferably formed with an opening edge 16 which narrows in a nozzle-like manner from an outer side to an inner side facing the fan wheel.
  • This opening edge 16 has, in particular, a surface that is convexly curved in longitudinal section. Alternatively, it could also be a cone-shaped inclined surface.
  • the locking lugs 10 are arranged in the tapered region of the opening edge 16. As a result, the protective grid 6 can be supported not only radially but also axially on the opening edge 16.
  • each locking element 12 has a radially outwardly projecting, fork-like end portion 18 which engages around the associated locking projection 10 of the cover 2 in the circumferential direction on both sides.
  • each latching element 12 has a surface contour of the opening edge 16 of the passage opening 4 adapted support contour 20 such that the end portion 18 can be supported on its support contour 20 radially and axially on the opening edge 16.
  • a radial support section 22 is arranged in each case between two adjacent latching elements 12 for the play-free support of the protective grid 6, wherein each support section 22 has an end-side contact contour 24 for radial and axial abutment on the opening edge 16 of the passage opening 4.
  • the support portions 22 are arranged relative to the latching elements 12 such that in the latched state of the protective grid 6, the support portions 22 axially and radially rest with no play on the opening edge 16 with a resilient contact force. This contact force is generated by slight regional deformation (axial deflection) of the protective grid 6.
  • the protective grid 6 in adaptation to the circular passage opening 4 from a central, in particular circular disk-shaped central portion 26 and a plurality of concentric, each spaced over radial safety distances circular or annular protective struts 28.
  • this may also be annular.
  • the protective grid 6 has, in the region of each latching element 12, a radially inwardly extending latching strut 30 which ends at one of the protective struts 28 spaced radially from the middle section 26.
  • each locking strut 30 does not extend as far as the middle part 26, so that a radial deformation of the protective strut (s) connected to or via the locking strut 30 is possible with a certain radial force.
  • the height of the required radial force - except for the material and / or shape-dependent spring elasticity of the individual protection struts 28 of the protective grid 6 - also depends on the number of with the respective locking strut 30 connected protection struts 28 from.
  • each locking element 12 is connected via the locking strut 30 with five protection struts 28, so that the radial spring force is generated in common by the deformation of the five struts 28.
  • the amount of radial spring force on the number of involved in the elastic deformation protection struts 28 can be specified.
  • each locking element 12 and the associated locking projection 10 cooperate when joining the connection on non-designated inclined surfaces, that during locking by an axial joining movement automatically elastic radial movement of each locking element 12 is effected under regional elastic deformation of the protective grid 6. In the latched state, a positive locking is then achieved in the axial direction, because a so-called undercut angle between locking surfaces of locking lug 10 and locking element 12 is greater than / equal to 90 °.
  • each support portion 22 is formed by a free, radially projecting end of a radially inwardly extending continuously to the central portion 26 supporting strut 32 of the protective grid 6.
  • a high radial stability of the protective grid 6 is achieved, in particular in the case of an even number of support sections 22 and support struts 32 with radially symmetric distribution, because then two support struts 32 are diametrically opposite each other on a common diameter line, so that in the direction of this diameter line almost no elastic deformation in the radial direction is possible.
  • the protective grid 6 may be formed as a one-piece molded part made of plastic.
  • the protective grid 6 may also consist at least partially of metal, in particular of a metal wire.
  • the cover 2 is preferably formed as a plastic molded part, wherein the locking lugs 10 are integrally formed.
  • the cover 2 as in Fig. 1 to 3 recognizable - overall annular with a likewise circular outer contour (eg as a so-called "wall ring") or as a housing / wall part with any, eg rectangular or square outer contour with optionally rounded or bevelled corners (eg as "Frontpiatte”) may be formed.
  • the protective grid 6 has at least three, in particular as shown, four locking elements 12 in a radially symmetrical circumferential distribution. This also applies accordingly to the number and arrangement of the locking struts 30, the support sections 22 and the support struts 32nd
  • the number of circular or annular protection struts 28 is dependent on the size of the passage opening 4 to be covered and the maximum safety distances between the adjacent protection struts 28.
  • seven protection struts 28 are provided concentrically around the central central part 26 around, each locking element 12 is connected via the associated locking strut 30 with the five outer protection struts 28. Deviating from this preferred embodiment but also any other embodiments are possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (10)

  1. Ensemble de grilles de protection (1) pour un ventilateur, constitué d'une partie de recouvrement (2) dotée d'une ouverture de passage d'air (4) et d'une grille de protection (6) reliée ou pouvant être reliée à la partie de recouvrement (2) par l'intermédiaire de plusieurs moyens d'assemblage par encliquetage (8) disposés de manière répartie sur la périphérie de manière à fermer l'ouverture de passage (4) aux fins de la protection contre les contacts dans la zone de cette dernière, dans lequel chaque moyen d'assemblage par encliquetage (8) est constitué d'un appendice d'encliquetage (10) disposé dans l'ouverture de passage (4) et d'un élément d'encliquetage (12) disposé au niveau de la grille de protection (6), et dans lequel la grille de protection (6) est constituée de manière à s'adapter à l'ouverture de passage (4) de forme circulaire d'une partie médiane centrale (26) et de plusieurs entretoises de protection (28) concentriques et de forme circulaire, dans lequel les éléments d'encliquetage (12) sont disposés au niveau du bord extérieur de la grille de protection (6), dans le plan de grille de cette dernière, de manière orientée uniquement radialement vers l'extérieur, dans lequel la grille de protection (6) est réalisée de manière à pouvoir être déformée élastiquement dans la zone de chaque élément d'encliquetage (12) de telle manière que chaque élément d'encliquetage (12) peut être déplacé de manière radiale par rapport à l'appendice d'encliquetage (10) associé aux fins de l'encliquetage et de la libération du moyen d'assemblage par encliquetage (8) moyennant une déformation élastique par endroits de la grille de protection (6), toutefois sans déformation élastique propre, et dans lequel la grille de protection (6) présente dans la zone de chaque élément d'encliquetage (12) une entretoise d'encliquetage (30) s'étendant radialement vers l'intérieur, laquelle se termine à une certaine distance radiale de la partie médiane (26) au niveau de l'une des entretoises de protection (28).
  2. Ensemble de grilles de protection selon la revendication 1,
    caractérisé en ce que l'ouverture de passage (4) de la partie de recouvrement (2) présente un bord d'ouverture (16) se rétrécissant à la manière d'une buse depuis un côté extérieur vers un côté intérieur et muni d'une surface s'étendant de manière oblique dans la section longitudinale, en particulier de manière convexe et courbée.
  3. Ensemble de grilles de protection selon la revendication 1 ou 2,
    caractérisé en ce que chaque élément d'encliquetage (12) de la grille de protection (6) présente une section d'extrémité (18) faisant saillie radialement vers l'extérieur, présentant une forme de fourche, laquelle section d'extrémité entoure de part et d'autre l'appendice d'encliquetage (10) associé de la partie de recouvrement (2) dans la direction périphérique.
  4. Ensemble de grilles de protection selon la revendication 2 ou 3,
    caractérisé en ce que chaque élément d'encliquetage (12) présente dans la zone d'extrémité libre un contour d'appui (20) adapté au contour de surface du bord d'ouverture (16) de l'ouverture de passage (4) de la partie de recouvrement (2).
  5. Ensemble de grilles de protection selon l'une quelconque des revendications 2 à 4,
    caractérisé en ce que la grille de protection (6) présente dans la direction périphérique, respectivement entre deux éléments d'encliquetage (12) adjacents, une section d'appui (22) radiale dotée d'un contour d'appui (24) côté extrémité destiné à venir en appui radialement et axialement sur le bord d'ouverture (16) de l'ouverture de passage (4) de la partie de recouvrement (2), dans lequel de préférence, lorsque la grille de protection (6) est enclenchée, les sections d'appui (22) reposent sur le bord d'ouverture (16) axialement et radialement sans jeu avec une force d'appui élastique.
  6. Ensemble de grilles de protection selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que chaque élément d'encliquetage (12) et l'appendice d'encliquetage (10) associé coopèrent d'un côté par l'intermédiaire de surfaces obliques et de l'autre côté par l'intermédiaire de surfaces d'encliquetage de telle manière que lors de l'insertion et de l'encliquetage, un mouvement d'insertion axial par l'intermédiaire des surfaces obliques permet d'entraîner de manière autonome un mouvement radial élastique de chaque élément d'encliquetage (12), et en ce qu'après l'encliquetage par l'intermédiaire des surfaces d'encliquetage, un assemblage par complémentarité de forme axial est permis.
  7. Ensemble de grilles de protection selon la revendication 5 ou 6,
    caractérisé en ce que chaque section d'appui (22) est formée par une extrémité libre faisant saillie radialement d'une entretoise de support (32) de la grille de protection (6), s'étendant radialement vers l'intérieur de manière continue jusqu'à la partie médiane (26).
  8. Ensemble de grilles de protection selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que la grille de protection (6) est formée à partir de plastique sous la forme d'une pièce moulée d'un seul tenant.
  9. Ensemble de grilles de protection selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que la grille de protection (6) est constituée en moins en partie d'un métal, en particulier d'un fil métallique.
  10. Ensemble de grilles de protection selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que la grille de protection (6) présente au moins trois, en particulier quatre éléments d'encliquetage (12) dans une répartition périphérique symétrique radialement.
EP20110170176 2010-07-24 2011-06-16 Agencement de grille de protection pour ventilateurs Active EP2410187B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201020010623 DE202010010623U1 (de) 2010-07-24 2010-07-24 Schutzgitter-Anordnung für Lüfter

Publications (2)

Publication Number Publication Date
EP2410187A1 EP2410187A1 (fr) 2012-01-25
EP2410187B1 true EP2410187B1 (fr) 2013-03-06

Family

ID=44587650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110170176 Active EP2410187B1 (fr) 2010-07-24 2011-06-16 Agencement de grille de protection pour ventilateurs

Country Status (7)

Country Link
US (1) US9080580B2 (fr)
EP (1) EP2410187B1 (fr)
CN (1) CN102345624B (fr)
DE (1) DE202010010623U1 (fr)
DK (1) DK2410187T3 (fr)
ES (1) ES2401895T3 (fr)
PT (1) PT2410187E (fr)

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CN102996527A (zh) * 2012-11-28 2013-03-27 李起武 一种风扇
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CN103727069B (zh) * 2013-12-19 2016-04-13 浙江双双制冷设备有限公司 一种离心风机用导流罩
CN103727070B (zh) * 2013-12-19 2016-04-13 浙江双双制冷设备有限公司 一种离心风机用低阻力导流罩
DE102014102370A1 (de) * 2014-02-24 2015-08-27 Ebm-Papst St. Georgen Gmbh & Co. Kg Strömungsgleichrichter sowie Lüfteranordnung mit Strömungsgleichrichter
CN104314881B (zh) * 2014-10-10 2016-09-07 江苏富丽华通用设备有限公司 一种风机防护网罩结构
DE102015200439A1 (de) * 2015-01-14 2016-07-14 Siemens Aktiengesellschaft Anordnung, Getriebeverdichter
DE102015201704A1 (de) 2015-01-30 2016-08-04 Ebm-Papst Mulfingen Gmbh & Co. Kg Aufnahmesystem
USD782645S1 (en) * 2015-05-26 2017-03-28 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan flow grid
USD776250S1 (en) * 2015-09-11 2017-01-10 Ebm-Papst Mulfingen Gmbh & Co. Kg Flow grid
USD775721S1 (en) * 2015-09-11 2017-01-03 Ebm-Papst Mulfingen Gmbh & Co. Kg Flow grid
CN107380643A (zh) * 2017-07-24 2017-11-24 宁夏如意科技时尚产业有限公司 一种棉纺周转设备
US10876545B2 (en) * 2018-04-09 2020-12-29 Vornado Air, Llc System and apparatus for providing a directed air flow
CN113374711B (zh) * 2021-07-29 2022-12-23 台州苏捷制阀有限公司 一种轴流风机

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Also Published As

Publication number Publication date
ES2401895T3 (es) 2013-04-25
DK2410187T3 (da) 2013-06-03
PT2410187E (pt) 2013-03-18
US20120020772A1 (en) 2012-01-26
CN102345624A (zh) 2012-02-08
EP2410187A1 (fr) 2012-01-25
DE202010010623U1 (de) 2011-11-02
CN102345624B (zh) 2015-05-20
US9080580B2 (en) 2015-07-14

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