EP2960523A1 - Attachment ring for turbine wheel of an air treatment unit and air treatment unit comprising such an attachment element - Google Patents

Attachment ring for turbine wheel of an air treatment unit and air treatment unit comprising such an attachment element Download PDF

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Publication number
EP2960523A1
EP2960523A1 EP15173042.1A EP15173042A EP2960523A1 EP 2960523 A1 EP2960523 A1 EP 2960523A1 EP 15173042 A EP15173042 A EP 15173042A EP 2960523 A1 EP2960523 A1 EP 2960523A1
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EP
European Patent Office
Prior art keywords
fastening element
shaft
turbine wheel
rotation
axis
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
EP15173042.1A
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German (de)
French (fr)
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EP2960523B1 (en
Inventor
Baptiste Excoffon
Jérôme Chamey
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.)
Carrier Corp
Original Assignee
Compagnie Industrielle dApplications Thermiques SA CIAT
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Publication of EP2960523A1 publication Critical patent/EP2960523A1/en
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Publication of EP2960523B1 publication Critical patent/EP2960523B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • 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

Definitions

  • the present invention relates to a fastener ring for an air handling unit turbine wheel, and an air handling unit comprising such a fastener.
  • the invention relates more particularly to the field of comfort units, which are air treatment units composed of a filter, a motor-fan unit and a heat exchanger. These elements are assembled and integrated into a frame, possibly equipped with a casing body.
  • comfort units are usually mounted in a lighter or integrated totally or partially into false ceilings or false floors.
  • the comfort units are mainly used to filter the air and thus guarantee the quality, and to temper the room or the volume considered by performing a heat exchange between the air to be treated and a fluid, often water or water. brine.
  • the fluid can be hot, it is then used to warm the room, or cold to cool it.
  • Air acts as a primary fluid and provides comfort, quality and temperature. It is conveyed in the comfort unit, by means of the motor-fan unit which is generally composed of a motor and a cradle, of one or more turbines, for example a centrifugal turbine, and metal components such as a platform, one or more scrolls and volute envelopes.
  • the motor-fan unit which is generally composed of a motor and a cradle, of one or more turbines, for example a centrifugal turbine, and metal components such as a platform, one or more scrolls and volute envelopes.
  • the air is sucked into the inlet side vents of the fan and is output at the desired speed and pressure conditions.
  • the wheel of the turbine is placed on one or two motor shafts and a fastener is used to make the wheel integral with the motor shafts.
  • This fixing element sometimes called hub, collar, or ring, has the primary function of immobilizing the wheel in rotation and in translation relative to the motor shaft, so that the wheel retains its initial position all along the lifetime of the comfort unit.
  • the fixing rings sometimes generate an unbalance which imbalances the dynamic operation of the comfort unit and accelerates the breakage of the fastener.
  • DE-A-197 08 767 discloses a hub for mounting a propeller on a motor, the hub comprising an outer cylindrical body and an inner cylindrical body, between which is deposited an elastic layer.
  • external ribs are provided on the outside of the inner cylindrical body, as are internal ribs on the inside of the outer cylindrical body. Given their respective diameters, these ribs are not taken with each other.
  • the elastic nature of the intermediate layer prevents rotation locking of the inner and outer cylindrical body relative to each other.
  • the fixing element is traversed by a passage provided to cooperate with the drive shaft, the passage and the shaft being each provided with a flat for locking in rotation of the fastener relative to the shaft.
  • the fixing element comprises rotational locking ribs of the fastening element with respect to the turbine wheel, the ribs being provided to cooperate with slots of the turbine wheel.
  • the fastening element comprises a screw cap, designed to cooperate with a set screw for locking in translation of the fastening element relative to the motor shaft.
  • the flat part of the fixing element ensures a locking of the rotation relative to the motor shaft.
  • the ribs make it possible to block the rotation of the fastening element with respect to the turbine wheel.
  • a pressure screw is received in the screw barrel, it ensures the locking in translation of the fastening element relative to the motor shaft.
  • the fixing element may be made of a light material, in particular a plastic material.
  • the fastening element has no unbalance, it does not generate vibrations caused by the effects of inertia.
  • the holding of the assembly carried out by the fixing element is improved with respect to the fixing elements of the prior art.
  • the figure 1 shows an air treatment unit or comfort unit 1, which comprises an electric motor 2 fixed on a platform 3 and rotating an output shaft 4 on which is fixed a turbine wheel 5 disposed in an envelope 6 provided with openings for the passage of air.
  • the turbine wheel 5 is of generally cylindrical shape with a circular base and comprises inner blades 51 extending in length along an axis of rotation X of the shaft 4 which is a common axis for the motor 2, the wheel turbine 5 and a ring 7 for fixing the turbine wheel 5 on the shaft 4.
  • a wall 52 perpendicular to the X axis extends inside the turbine wheel 5. Along the X axis, the wall 52 is disposed at a central zone of the turbine wheel 5. A bushing 53 centered on the X axis extends through the wall 52.
  • Each longitudinal end of the sleeve 53 has a plurality of slots 54, for example six slots parallel to the X axis and opening at this longitudinal end.
  • the two faces of the wall 52 are provided with a plurality of reinforcing ribs 55, for example six ribs, each extending in length in a radial direction relative to the axis X.
  • the ribs 55 are adjacent to the sleeve 53 and are angularly spaced uniformly about the X axis.
  • the ribs 55 are angularly aligned about the X axis with the slots 54.
  • the shaft 4 has a flat portion 41 extending parallel to the axis X.
  • the ring 7 immobilizes in rotation and in translation of the wheel 5 relative to the shaft 4.
  • the ring 7 comprises two parts 7A and 7B of generally cylindrical shape and circular base.
  • Part 7A is intended to be mounted on the side of the wall 52 of the turbine wheel 5.
  • the ring 7 is traversed by a central and longitudinal passage 71 centered on the axis X, for the passage of the shaft 4.
  • the diameter of the passage 71 is greater than the diameter of the passage 71 in Part 7B.
  • an inner shoulder 72 of annular shape, perpendicular to the axis X, extends between the parts 7A and 7B. The shoulder 72 abuts against one end of the sleeve 54 of the turbine wheel 5.
  • the cylindrical wall of the ring 7 which defines the passage 71 comprises a plurality of ribs 73 parallel to the axis X and distributed angularly in a regular manner about the axis X.
  • the number of ribs 73 is equal to the number of slots 54 of the turbine wheel 5.
  • the ribs 73 are arranged in the slots 54 so as to achieve rotational locking of the ring 7 relative to the shaft 4, in the manner of splines.
  • the cylindrical wall of the ring 7 which delimits the passage 71 has a flat 74 parallel to the axis X which cooperates with the flat portion 41 of the shaft 4, so as to realize a blockage of the rotation of the ring 7 relative to the shaft 4.
  • the outer wall of the portion 7B of the ring 7 comprises a plurality of lugs 75 for locating the angular position of the ring 7, for example three lugs, angularly spaced regularly around the axis X.
  • the lugs 75 constitute a visual cue for the blind mounting of the ring 7.
  • the portion 7A of the ring 7 comprises a screw thread 76 extending radially.
  • the screw thread 76 is pierced with a threaded hole designed to receive a pressure screw passing through one of the slots 54.
  • the pressure screw is not shown and allows the clamping of the ring 7 on the flat part. 41 of the shaft 4, so as to block the translation, along the axis X, of the ring 7 relative to the shaft 4.
  • the ring 7 thus blocks the translation of the turbine wheel 5, along the axis X, with respect to the shaft 4.
  • the screw bit 76 has reinforcing ribs 76.1, 76.2, 76.3 and 76.4.
  • the ribs 76.1 and 76.2 extend perpendicularly to the X axis, while the ribs 76.3 and 76.4 extend perpendicularly to the ribs 76.1 and 76.2, in a plane which passes through the X axis and the axis of the screw 76.
  • the ribs 76.1 to 76.4 make it possible to reinforce the mechanical strength of the screw thread 76 and the ring 7 when tightening the pressure screw.
  • a protrusion 77 diametrically opposed to the screw thread 76 extends from the outer wall of the portion 7A of the ring 7.
  • the protrusion 77 comprises a wall 77.1 coplanar with the ribs 76.3 and 76.4, and a wall 77.2 perpendicular to the axis X.
  • the protrusion 77 also provides a mechanical reinforcement of the ring 7.
  • Protrusions or protuberances 78 parallel to the axis X are present on the outer wall of the portion 7A of the ring 7.
  • the protuberances 77 and 78 are distributed angularly in a regular manner about the axis X.
  • the protuberances 78 and the protrusion 77 realize a balancing of the inertia of the ring 7, so as to avoid unbalance effects which are detrimental to the life of the ring 7.
  • the ring 7 is made of plastic material, preferably a material comprising a thermoplastic polymer, such as a polyester.
  • the thermoplastic polymer optionally further comprises fibers such as fibers reinforced flame retardants, especially glass fibers.
  • a polyester is polybutylene terephthalate, such as PBT GF 30 (Trade Mark) which is reinforced with glass fibers. This material is relatively light, which is advantageous.
  • the ring 7 is adapted for fixing a turbine wheel 5 made of plastic or composite material. It can be used for various types of comfort units, which reduces manufacturing costs.
  • the ring 7 makes it possible to obtain satisfactory aeraulic, acoustic and mechanical performances, by ensuring a balancing of the masses with a view to reducing the vibrations of the rotating elements.

Abstract

Cet élément de fixation (7) est prévu pour roue de turbine d'unité de traitement d'air, l'unité de traitement d'air comprenant un moteur entrainant en rotation, autour d'un axe (X), un arbre, et un élément de fixation (7) de la roue de turbine sur l'arbre. L'élément de fixation (7) est traversé par un passage (71) prévu pour coopérer avec l'arbre moteur, le passage (71) et l'arbre étant chacun pourvus d'un méplat (73) pour le blocage en rotation de l'élément de fixation (7) par rapport à l'arbre. L'élément de fixation (7) comporte des nervures (73) de blocage en rotation de l'élément de fixation (7) par rapport à la roue de turbine, les nervures (73) étant prévues pour coopérer avec des fentes de la roue de turbine. L'élément de fixation (7) comporte un fut de vis (76), prévu pour coopérer avec une vis de pression pour le blocage en translation de l'élément de fixation (7) par rapport à l'arbre moteur.This fixing element (7) is provided for an air handling unit turbine wheel, the air treatment unit comprising a motor driving in rotation, about an axis (X), a shaft, and a fastening element (7) of the turbine wheel on the shaft. The fixing element (7) is traversed by a passage (71) designed to cooperate with the drive shaft, the passage (71) and the shaft each being provided with a flattening surface (73) for locking in rotation of the fastening element (7) with respect to the shaft. The fixing element (7) comprises ribs (73) for locking the fastening element (7) in rotation with respect to the turbine wheel, the ribs (73) being provided to cooperate with slots in the wheel of turbine. The fastening element (7) comprises a screw thread (76), designed to cooperate with a set screw for locking in translation of the fastening element (7) with respect to the motor shaft.

Description

La présente invention concerne une bague de fixation pour une roue de turbine d'unité de traitement d'air, et unité de traitement d'air comprenant un tel élément de fixation.The present invention relates to a fastener ring for an air handling unit turbine wheel, and an air handling unit comprising such a fastener.

L'invention concerne plus particulièrement le domaine des unités de confort, qui sont des appareils de traitement d'air composés d'un filtre, d'un groupe moto-ventilateur et d'un échangeur thermique. Ces éléments sont assemblés et intégrés dans un châssis, éventuellement équipé d'une carrosserie d'habillage.The invention relates more particularly to the field of comfort units, which are air treatment units composed of a filter, a motor-fan unit and a heat exchanger. These elements are assembled and integrated into a frame, possibly equipped with a casing body.

Ces unités de confort sont généralement montées en allège ou intégrés totalement ou en partie dans des faux-plafonds ou des faux-planchers.These comfort units are usually mounted in a lighter or integrated totally or partially into false ceilings or false floors.

Les unités de confort sont utilisées principalement pour filtrer l'air et en garantir ainsi la qualité, et pour tempérer le local ou le volume considéré en réalisant un échange thermique entre l'air à traiter et un fluide, souvent de l'eau ou de l'eau glycolée. Le fluide peut être chaud, il est alors utilisé pour réchauffer le local, ou froid afin de le rafraichir.The comfort units are mainly used to filter the air and thus guarantee the quality, and to temper the room or the volume considered by performing a heat exchange between the air to be treated and a fluid, often water or water. brine. The fluid can be hot, it is then used to warm the room, or cold to cool it.

L'air tient lieu de fluide primaire, et permet d'apporter confort, qualité et température. Il est véhiculé dans l'unité de confort, au moyen du groupe moto-ventilateur qui est généralement composé d'un moteur et d'un berceau, d'une ou plusieurs turbines, par exemple une turbine centrifuge, et de composants métalliques tels qu'une plateforme, une ou plusieurs volutes et enveloppes de volutes.Air acts as a primary fluid and provides comfort, quality and temperature. It is conveyed in the comfort unit, by means of the motor-fan unit which is generally composed of a motor and a cradle, of one or more turbines, for example a centrifugal turbine, and metal components such as a platform, one or more scrolls and volute envelopes.

L'air est aspiré en entrée par des ouïes latérales du ventilateur et est diffusée en sortie à des conditions de vitesse et de pression désirées.The air is sucked into the inlet side vents of the fan and is output at the desired speed and pressure conditions.

La roue de la turbine est mise en place sur un ou deux arbres moteurs et un élément de fixation est utilisé pour rendre la roue solidaire des arbres moteurs.The wheel of the turbine is placed on one or two motor shafts and a fastener is used to make the wheel integral with the motor shafts.

Cet élément de fixation, parfois appelé moyeu, collier, ou bague, a pour fonction première d'immobiliser la roue en rotation et en translation par rapport à l'arbre moteur, de sorte que la roue conserve sa position initiale tout le long de la durée de vie de l'unité de confort.This fixing element, sometimes called hub, collar, or ring, has the primary function of immobilizing the wheel in rotation and in translation relative to the motor shaft, so that the wheel retains its initial position all along the lifetime of the comfort unit.

De manière classique, pour fixer la roue de turbine à l'arbre moteur, il est connu de réaliser un montage serré de type montage sous presse, qui consiste en un assemblage forcé entre l'arbre moteur et la bague de fixation, le diamètre externe de l'arbre moteur étant légèrement supérieur au diamètre interne de la bague de fixation.Conventionally, to fix the turbine wheel to the motor shaft, it is known to make a press-tight type assembly, which consists of a forced assembly between the motor shaft and the fixing ring, the external diameter the motor shaft being slightly greater than the internal diameter of the fixing ring.

En alternative, il est connu d'utiliser un collier métallique ou en matière plastique afin de serrer la bague de fixation sur l'arbre moteur.Alternatively, it is known to use a metal collar or plastic to tighten the fixing ring on the motor shaft.

Enfin, il est connu de réaliser un montage glissant entre la bague de fixation et l'arbre moteur, ces éléments étant pourvus d'un méplat afin de bloquer leur rotation relative. Une vis de pression vissée dans la bague de fixation permet de bloquer leur translation relative.Finally, it is known to make a sliding mounting between the fixing ring and the motor shaft, these elements being provided with a flat so as to block their relative rotation. A pressure screw screwed into the fixing ring makes it possible to block their relative translation.

Ces trois types de fixations, utilisées de manière classique pour fixer une roue de turbine métallique avec une bague de fixation métallique, posent des problèmes de tenue dans le temps lorsqu'il s'agit de fixer une roue de turbine, réalisée en matériau composite, sur un arbre métallique. En raison de la souplesse du matériau composite, l'assemblage a tendance à se rompre après quelques centaines d'heures de fonctionnement.These three types of fasteners, conventionally used to fix a metal turbine wheel with a metal fixing ring, pose problems with respect to time when it comes to fixing a turbine wheel made of composite material. on a metal tree. Due to the flexibility of the composite material, the assembly tends to break after a few hundred hours of operation.

Par ailleurs, les bagues de fixation génèrent parfois un balourd qui déséquilibre le fonctionnement dynamique de l'unité de confort et accélère la rupture de la fixation.Moreover, the fixing rings sometimes generate an unbalance which imbalances the dynamic operation of the comfort unit and accelerates the breakage of the fastener.

DE-A-197 08 767 divulgue un moyeu prévu pour le montage d'une hélice sur un moteur, ce moyeu comprenant un corps cylindrique externe et un corps cylindrique interne, entre lesquels est déposée une couche élastique. Dans le mode de réalisation des figures 5A et 5B, des nervures externes sont prévues sur l'extérieur du corps cylindrique interne, de même que des nervures internes sur l'intérieur du corps cylindrique externe. Compte tenu de leurs diamètres respectifs, ces nervures ne sont pas prises les unes avec les autres. En outre, le caractère élastique de la couche intercalaire empêche un blocage en rotation des corps cylindrique interne et externe l'un par rapport à l'autre. Enfin, il n'est pas prévu de moyen permettant un blocage en translation de ces corps cylindrique l'un par rapport à l'autre, ce qui induit un risque de démontage intempestif. DE-A-197 08 767 discloses a hub for mounting a propeller on a motor, the hub comprising an outer cylindrical body and an inner cylindrical body, between which is deposited an elastic layer. In the embodiment of Figures 5A and 5B external ribs are provided on the outside of the inner cylindrical body, as are internal ribs on the inside of the outer cylindrical body. Given their respective diameters, these ribs are not taken with each other. In addition, the elastic nature of the intermediate layer prevents rotation locking of the inner and outer cylindrical body relative to each other. Finally, there is no provision for a locking in translation of these cylindrical body relative to each other, which induces a risk of inadvertent disassembly.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un élément de fixation pour roue de turbine d'unité de traitement d'air, l'unité de traitement d'air comprenant :

  • un moteur entrainant en rotation, autour d'un axe, un arbre,
  • un élément de fixation de la roue de turbine sur l'arbre.
It is to these drawbacks that the invention more particularly intends to remedy by proposing a fixing element for an air handling unit turbine wheel, the air treatment unit comprising:
  • a motor driving in rotation, about an axis, a tree,
  • a fastening element of the turbine wheel on the shaft.

L'élément de fixation est traversé par un passage prévu pour coopérer avec l'arbre moteur, le passage et l'arbre étant chacun pourvus d'un méplat pour le blocage en rotation de l'élément de fixation par rapport à l'arbre. L'élément de fixation comporte des nervures de blocage en rotation de l'élément de fixation par rapport à la roue de turbine, les nervures étant prévues pour coopérer avec des fentes de la roue de turbine. L'élément de fixation comporte un fut de vis, prévu pour coopérer avec une vis de pression pour le blocage en translation de l'élément de fixation par rapport à l'arbre moteur.The fixing element is traversed by a passage provided to cooperate with the drive shaft, the passage and the shaft being each provided with a flat for locking in rotation of the fastener relative to the shaft. The fixing element comprises rotational locking ribs of the fastening element with respect to the turbine wheel, the ribs being provided to cooperate with slots of the turbine wheel. The fastening element comprises a screw cap, designed to cooperate with a set screw for locking in translation of the fastening element relative to the motor shaft.

Grâce à l'invention, le méplat de l'élément de fixation assure un blocage de la rotation par rapport à l'arbre moteur. Les nervures permettent de bloquer la rotation de l'élément de fixation par rapport à la roue de turbine. Lorsqu'une vis de pression est reçue dans le fût de vis, elle assure le blocage en translation de l'élément de fixation par rapport à l'arbre moteur.Thanks to the invention, the flat part of the fixing element ensures a locking of the rotation relative to the motor shaft. The ribs make it possible to block the rotation of the fastening element with respect to the turbine wheel. When a pressure screw is received in the screw barrel, it ensures the locking in translation of the fastening element relative to the motor shaft.

L'élément de fixation peut être réalisé dans un matériau léger, notamment un matériau plastique. L'élément de fixation ne comporte pas de balourds, il ne génère pas vibrations causées par les effets de l'inertie. La tenue de l'assemblage réalisé par l'élément de fixation est améliorée par rapport aux éléments de fixation de l'art antérieur.The fixing element may be made of a light material, in particular a plastic material. The fastening element has no unbalance, it does not generate vibrations caused by the effects of inertia. The holding of the assembly carried out by the fixing element is improved with respect to the fixing elements of the prior art.

Selon des aspects avantageux mais non obligatoires de l'invention, un tel élément de fixation peut incorporer une ou plusieurs des caractéristiques suivantes, prises dans toute combinaison techniquement admissible :

  • L'élément comprend au moins une excroissance d'équilibrage de l'inertie de l'élément de fixation.
  • L'une des excroissances est diamétralement opposée au fut de vis.
  • Les excroissances sont réparties angulairement de manière régulière autour de l'axe.
  • L'élément comprend des nervures de renfort mécanique du fut de vis.
  • Une paroi externe de l'élément de fixation comporte au moins un ergot de repérage de la position angulaire de l'élément de fixation.
  • L'élément de fixation est réalisé en un matériau plastique, de préférence un matériau comprenant un polymère thermoplastique, notamment un polytéréphtalate de butylène.
  • Le matériau plastique comprend en outre des fibres, notamment des fibres de verre.
  • L'élément de fixation comporte un épaulement interne prévu pour venir en butée contre la roue de turbine.
According to advantageous but non-mandatory aspects of the invention, such a fastener may incorporate one or more of the following features, taken in any technically permissible combination:
  • The element comprises at least one balancing protrusion of the inertia of the fixing element.
  • One of the excrescences is diametrically opposed to the screw.
  • The growths are angularly distributed regularly around the axis.
  • The element comprises ribs for mechanical reinforcement of the screw.
  • An outer wall of the fastener element comprises at least one locating pin for the angular position of the fastener element.
  • The fastener is made of a plastic material, preferably a material comprising a thermoplastic polymer, especially a polybutylene terephthalate.
  • The plastics material further comprises fibers, especially glass fibers.
  • The fixing element has an internal shoulder designed to abut against the turbine wheel.

L'invention concerne également une unité de traitement d'air qui comprend :

  • un moteur entrainant en rotation, autour d'un axe, un arbre,
  • un élément de fixation de la roue de turbine sur l'arbre conforme à l'invention.
The invention also relates to an air treatment unit which comprises:
  • a motor driving in rotation, about an axis, a tree,
  • a fastening element of the turbine wheel on the shaft according to the invention.

L'invention sera mieux comprise et d'autres avantages de celle-ci ressortiront plus clairement à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins, dans lesquels :

  • la figure 1 est une vue d'une unité de traitement de l'air conforme à l'invention, incluant une bague de fixation d'une roue de turbine sur un arbre moteur ;
  • la figure 2 est une vue de la roue de turbine selon la flèche II à la figure 1, la bague et l'arbre moteur n'étant pas représentés ;
  • la figure 3 est une coupe longitudinale de la roue de turbine de la figure 2 ;
  • la figure 4 est une vue en perspective de la bague de la figure 1 ;
  • la figure 5 est une vue de la bague selon la flèche V à la figure 4 ; et
  • la figure 6 est une coupe selon la ligne VI-VI à la figure 5.
The invention will be better understood and other advantages thereof will emerge more clearly on reading the description which follows, given solely by way of example and with reference to the drawings, in which:
  • the figure 1 is a view of an air handling unit according to the invention, including a ring for fixing a turbine wheel on a motor shaft;
  • the figure 2 is a view of the turbine wheel according to arrow II to the figure 1 the ring and the motor shaft are not shown;
  • the figure 3 is a longitudinal section of the turbine wheel of the figure 2 ;
  • the figure 4 is a perspective view of the ring of the figure 1 ;
  • the figure 5 is a view of the ring according to the arrow V at the figure 4 ; and
  • the figure 6 is a section along the line VI-VI to the figure 5 .

La figure 1 montre une unité de traitement d'air ou unité de confort 1, qui comprend un moteur électrique 2 fixé sur une plateforme 3 et entrainant en rotation un arbre de sortie 4 sur lequel est fixée une roue de turbine 5 disposée dans une enveloppe 6 pourvue d'ouvertures pour le passage de l'air.The figure 1 shows an air treatment unit or comfort unit 1, which comprises an electric motor 2 fixed on a platform 3 and rotating an output shaft 4 on which is fixed a turbine wheel 5 disposed in an envelope 6 provided with openings for the passage of air.

La roue de turbine 5 est de forme généralement cylindrique à base circulaire et comprend des aubes 51 intérieures s'étendant en longueur le long d'un axe de rotation X de l'arbre 4 qui est un axe commun pour le moteur 2, la roue de turbine 5 et une bague 7 de fixation de la roue de turbine 5 sur l'arbre 4.The turbine wheel 5 is of generally cylindrical shape with a circular base and comprises inner blades 51 extending in length along an axis of rotation X of the shaft 4 which is a common axis for the motor 2, the wheel turbine 5 and a ring 7 for fixing the turbine wheel 5 on the shaft 4.

Une paroi 52 perpendiculaire à l'axe X s'étend à l'intérieur de la roue de turbine 5. Le long de l'axe X, la paroi 52 est disposée au niveau d'une zone médiane de la roue de turbine 5. Une douille 53 centrée sur l'axe X s'étend au travers de la paroi 52.A wall 52 perpendicular to the X axis extends inside the turbine wheel 5. Along the X axis, the wall 52 is disposed at a central zone of the turbine wheel 5. A bushing 53 centered on the X axis extends through the wall 52.

Chaque extrémité longitudinale de la douille 53 comporte une pluralité de fentes 54, par exemple six fentes, parallèles à l'axe X et débouchant au niveau de cette extrémité longitudinale.Each longitudinal end of the sleeve 53 has a plurality of slots 54, for example six slots parallel to the X axis and opening at this longitudinal end.

Les deux faces de la paroi 52 sont pourvues d'une pluralité de nervures de renfort 55, par exemple six nervures, s'étendant chacune en longueur selon une direction radiale par rapport à l'axe X. Les nervures 55 sont adjacentes à la douille 53 et sont espacées angulairement de manière uniforme autour de l'axe X. Les nervures 55 sont alignées angulairement, autour de l'axe X, avec les fentes 54.The two faces of the wall 52 are provided with a plurality of reinforcing ribs 55, for example six ribs, each extending in length in a radial direction relative to the axis X. The ribs 55 are adjacent to the sleeve 53 and are angularly spaced uniformly about the X axis. The ribs 55 are angularly aligned about the X axis with the slots 54.

L'arbre 4 comporte un méplat 41 s'étendant parallèlement à l'axe X.The shaft 4 has a flat portion 41 extending parallel to the axis X.

La bague 7 réalise un blocage en rotation et en translation de la roue 5 par rapport à l'arbre 4. Le long de l'axe X, la bague 7 comprend deux parties 7A et 7B de forme globalement cylindrique et à base circulaire. La partie 7A est prévue pour être montée du côté de la paroi 52 de la roue de turbine 5.The ring 7 immobilizes in rotation and in translation of the wheel 5 relative to the shaft 4. Along the axis X, the ring 7 comprises two parts 7A and 7B of generally cylindrical shape and circular base. Part 7A is intended to be mounted on the side of the wall 52 of the turbine wheel 5.

La bague 7 est traversée par un passage central et longitudinal 71 centré sur l'axe X, pour le passage de l'arbre 4. Au niveau de la partie 7A de la bague 7, le diamètre du passage 71 est supérieur au diamètre du passage 71 dans la partie 7B. Ainsi, un épaulement interne 72 de forme annulaire, perpendiculaire à l'axe X, s'étend entre les parties 7A et 7B. L'épaulement 72 vient en butée contre une extrémité de la douille 54 de la roue de turbine 5.The ring 7 is traversed by a central and longitudinal passage 71 centered on the axis X, for the passage of the shaft 4. At the portion 7A of the ring 7, the diameter of the passage 71 is greater than the diameter of the passage 71 in Part 7B. Thus, an inner shoulder 72 of annular shape, perpendicular to the axis X, extends between the parts 7A and 7B. The shoulder 72 abuts against one end of the sleeve 54 of the turbine wheel 5.

A l'intérieur de la partie 7A, la paroi cylindrique de la bague 7 qui délimite le passage 71 comporte une pluralité de nervures 73 parallèles à l'axe X et réparties angulairement de manière régulière autour de l'axe X. Le nombre de nervures 73 est égal au nombre de fentes 54 de la roue de turbine 5. Les nervures 73 sont disposées dans les fentes 54 de manière à réaliser un blocage en rotation de la bague 7 par rapport à l'arbre 4, à la manière de cannelures.Inside the portion 7A, the cylindrical wall of the ring 7 which defines the passage 71 comprises a plurality of ribs 73 parallel to the axis X and distributed angularly in a regular manner about the axis X. The number of ribs 73 is equal to the number of slots 54 of the turbine wheel 5. The ribs 73 are arranged in the slots 54 so as to achieve rotational locking of the ring 7 relative to the shaft 4, in the manner of splines.

A l'intérieur de la partie 7B, la paroi cylindrique de la bague 7 qui délimite le passage 71 comporte un méplat 74 parallèle à l'axe X qui coopère avec le méplat 41 de l'arbre 4, de manière à réaliser un blocage de la rotation de la bague 7 par rapport à l'arbre 4.Inside the part 7B, the cylindrical wall of the ring 7 which delimits the passage 71 has a flat 74 parallel to the axis X which cooperates with the flat portion 41 of the shaft 4, so as to realize a blockage of the rotation of the ring 7 relative to the shaft 4.

La paroi externe de la partie 7B de la bague 7 comporte une pluralité d'ergots 75 de repérage de la position angulaire de la bague 7, par exemple trois ergots, espacés angulairement de manière régulière autour de l'axe X. Les ergots 75 constituent un repère visuel pour le montage en aveugle de la bague 7.The outer wall of the portion 7B of the ring 7 comprises a plurality of lugs 75 for locating the angular position of the ring 7, for example three lugs, angularly spaced regularly around the axis X. The lugs 75 constitute a visual cue for the blind mounting of the ring 7.

La partie 7A de la bague 7 comporte un fut de vis 76 s'étendant radialement. Le fut de vis 76 est percé d'un trou fileté prévu pour recevoir une vis de pression passant au travers de l'une des fentes 54. La vis de pression n'est pas représentée et permet le serrage de la bague 7 sur le méplat 41 de l'arbre 4, de manière à bloquer la translation, le long de l'axe X, de la bague 7 par rapport à l'arbre 4.The portion 7A of the ring 7 comprises a screw thread 76 extending radially. The screw thread 76 is pierced with a threaded hole designed to receive a pressure screw passing through one of the slots 54. The pressure screw is not shown and allows the clamping of the ring 7 on the flat part. 41 of the shaft 4, so as to block the translation, along the axis X, of the ring 7 relative to the shaft 4.

La bague 7 bloque ainsi la translation de la roue de turbine 5, le long de l'axe X, par rapport à l'arbre 4.The ring 7 thus blocks the translation of the turbine wheel 5, along the axis X, with respect to the shaft 4.

Le fut de vis 76 comporte des nervures de renfort 76.1, 76.2, 76.3 et 76.4. Les nervures 76.1 et 76.2 s'étendent perpendiculairement à l'axe X, tandis que les nervures 76.3 et 76.4 s'étendent perpendiculairement aux nervures 76.1 et 76.2, dans un plan qui passe par l'axe X et par l'axe du fut de vis 76.The screw bit 76 has reinforcing ribs 76.1, 76.2, 76.3 and 76.4. The ribs 76.1 and 76.2 extend perpendicularly to the X axis, while the ribs 76.3 and 76.4 extend perpendicularly to the ribs 76.1 and 76.2, in a plane which passes through the X axis and the axis of the screw 76.

Les nervures 76.1 à 76.4 permettent de renforcer la tenue mécanique du fut de vis 76 et de la bague 7 lors du serrage de la vis de pression.The ribs 76.1 to 76.4 make it possible to reinforce the mechanical strength of the screw thread 76 and the ring 7 when tightening the pressure screw.

Une excroissance 77 diamétralement opposée au fut de vis 76 s'étend à partir de la paroi externe de la partie 7A de la bague 7. L'excroissance 77 comprend une paroi 77.1 coplanaire avec les nervures 76.3 et 76.4, et une paroi 77.2 perpendiculaire à l'axe X. L'excroissance 77 assure également un renfort mécanique de la bague 7.A protrusion 77 diametrically opposed to the screw thread 76 extends from the outer wall of the portion 7A of the ring 7. The protrusion 77 comprises a wall 77.1 coplanar with the ribs 76.3 and 76.4, and a wall 77.2 perpendicular to the axis X. The protrusion 77 also provides a mechanical reinforcement of the ring 7.

Des protubérances ou excroissances 78 parallèles à l'axe X sont présentes sur la paroi externe de la partie 7A de la bague 7. Les protubérances 77 et 78 sont réparties angulairement de manière régulière autour de l'axe X.Protrusions or protuberances 78 parallel to the axis X are present on the outer wall of the portion 7A of the ring 7. The protuberances 77 and 78 are distributed angularly in a regular manner about the axis X.

Les protubérances 78 et l'excroissance 77 réalisent un équilibrage de l'inertie de la bague 7, de manière à éviter les effets de balourd qui sont néfastes pour la durée de vie de la bague 7.The protuberances 78 and the protrusion 77 realize a balancing of the inertia of the ring 7, so as to avoid unbalance effects which are detrimental to the life of the ring 7.

La bague 7 est réalisée en matériau plastique, de préférence un matériau comprenant un polymère thermoplastique, tel qu'un polyester. Le polymère thermoplastique comprend éventuellement en outre des fibres telles que des fibres renforcées ignifugées, notamment des fibres de verre. Un exemple de polyester est un polytéréphtalate de butylène, tel que le PBT GF 30 (marque déposée) qui est renforcé par des fibres de verre. Ce matériau est relativement léger, ce qui est avantageux.The ring 7 is made of plastic material, preferably a material comprising a thermoplastic polymer, such as a polyester. The thermoplastic polymer optionally further comprises fibers such as fibers reinforced flame retardants, especially glass fibers. An example of a polyester is polybutylene terephthalate, such as PBT GF 30 (Trade Mark) which is reinforced with glass fibers. This material is relatively light, which is advantageous.

La bague 7 est adaptée pour la fixation d'une roue de turbine 5 réalisée en matériau plastique ou composite. Elle peut être utilisée pour divers types d'unités de confort, ce qui permet de réduire les coûts de fabrication. La bague 7 permet d'obtenir des performances aérauliques, acoustiques et mécaniques satisfaisantes, en assurant un équilibrage des masses en vue de la réduction des vibrations des éléments tournants.The ring 7 is adapted for fixing a turbine wheel 5 made of plastic or composite material. It can be used for various types of comfort units, which reduces manufacturing costs. The ring 7 makes it possible to obtain satisfactory aeraulic, acoustic and mechanical performances, by ensuring a balancing of the masses with a view to reducing the vibrations of the rotating elements.

La tenue de l'assemblage après serrage de la vis de pression, en rotation et en translation, ainsi que la résistance l'humidité et aux variations de température, est largement supérieure aux solutions existantes.The holding of the assembly after tightening the pressure screw, in rotation and in translation, as well as the resistance to humidity and to temperature variations, is far superior to existing solutions.

Claims (10)

Elément de fixation (7) pour roue de turbine (5) d'unité de traitement d'air (1), l'unité de traitement d'air (1) comprenant : - un moteur (2) entrainant en rotation, autour d'un axe (X), un arbre (4), - un élément de fixation (7) de la roue de turbine (5) sur l'arbre (4), dans lequel l'élément de fixation (7) est traversé par un passage (71) prévu pour coopérer avec l'arbre moteur (4), le passage (71) et l'arbre (4) étant chacun pourvus d'un méplat (74, 41) pour le blocage en rotation de l'élément de fixation (7) par rapport à l'arbre (4),
caractérisé - en ce que l'élément de fixation (7) comporte des nervures (73) de blocage en rotation de l'élément de fixation (7) par rapport à la roue de turbine (5), les nervures (73) étant prévues pour coopérer avec des fentes (54) de la roue de turbine (5), - en ce que l'élément de fixation (7) comporte un fut de vis (76), prévu pour coopérer avec une vis de pression pour le blocage en translation de l'élément de fixation (7) par rapport à l'arbre moteur (4). Fastening element (7) for turbine wheel (5) of air handling unit (1), the air handling unit (1) comprising: - a motor (2) driving in rotation, about an axis (X), a shaft (4), a fastening element (7) for the turbine wheel (5) on the shaft (4), in which the fastening element (7) is traversed by a passage (71) designed to cooperate with the drive shaft (4), the passage (71) and the shaft (4) being each provided with a flattened surface ( 74, 41) for locking in rotation of the fastening element (7) with respect to the shaft (4),
characterized in that the fixing element (7) comprises ribs (73) for locking the fastening element (7) in rotation with respect to the turbine wheel (5), the ribs (73) being provided for cooperate with slots (54) of the turbine wheel (5), in that the fastening element (7) comprises a screw thread (76) designed to cooperate with a set screw for locking in translation of the fastening element (7) with respect to the motor shaft. (4). Elément de fixation (7) selon la revendication 1, caractérisé en ce qu'il comprend au moins une excroissance (77, 78) d'équilibrage de l'inertie de l'élément de fixation (7).Fastening element (7) according to claim 1, characterized in that it comprises at least one protrusion (77, 78) for balancing the inertia of the fastening element (7). Elément de fixation (7) selon la revendication 2, caractérisé en ce que l'une des excroissances (77) est diamétralement opposée au fut de vis (76).Fastening element (7) according to claim 2, characterized in that one of the protuberances (77) is diametrically opposed to the screw thread (76). Elément de fixation (7) selon l'une des revendications 2 ou 3, caractérisé en ce que les excroissances (77, 78) sont réparties angulairement de manière régulière autour de l'axe (X).Fastening element (7) according to one of claims 2 or 3, characterized in that the protuberances (77, 78) are angularly distributed uniformly about the axis (X). Elément de fixation (7) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend des nervures (76.1-76.4) de renfort mécanique du fut de vis (76).Fastening element (7) according to one of the preceding claims, characterized in that it comprises ribs (76.1-76.4) for mechanical reinforcement of the screw thread (76). Elément de fixation (7) selon l'une des revendications précédentes, caractérisé en ce qu'une paroi externe de l'élément de fixation (7) comporte au moins un ergot (75) de repérage de la position angulaire de l'élément de fixation (7).Fastening element (7) according to one of the preceding claims, characterized in that an outer wall of the fastening element (7) comprises at least one lug (75) for locating the angular position of the element of fixing (7). Elément de fixation (7) selon l'une des revendications précédentes, caractérisé en ce que l'élément de fixation (7) est réalisé en un matériau plastique, de préférence un matériau comprenant un polymère thermoplastique, notamment un polytéréphtalate de butylène.Fastening element (7) according to one of the preceding claims, characterized in that the fastening element (7) is made of a plastic material, preferably a material comprising a thermoplastic polymer, especially a polybutylene terephthalate. Elément de fixation (7) selon la revendication 7, caractérisé en ce que le matériau plastique comprend en outre des fibres, notamment des fibres de verre.Fastening element (7) according to claim 7, characterized in that the plastic material further comprises fibers, especially glass fibers. Elément de fixation (7) selon l'une des revendications précédentes, caractérisé en ce que l'élément de fixation (7) comporte un épaulement interne (72) prévu pour venir en butée contre la roue de turbine (5).Fastening element (7) according to one of the preceding claims, characterized in that the fastening element (7) has an internal shoulder (72) designed to abut against the turbine wheel (5). Unité de traitement d'air (1), caractérisée en ce qu'elle comprend : - un moteur (2) entrainant en rotation, autour d'un axe (X), un arbre (4), - un élément de fixation (7) de la roue de turbine (5) sur l'arbre (4), conforme à l'une des revendications précédentes. Air treatment unit (1), characterized in that it comprises: - a motor (2) driving in rotation, about an axis (X), a shaft (4), - An attachment element (7) of the turbine wheel (5) on the shaft (4), according to one of the preceding claims.
EP15173042.1A 2014-06-23 2015-06-22 Attachment ring for turbine wheel of an air treatment unit and air treatment unit comprising such an attachment element Active EP2960523B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1455796A FR3022579B1 (en) 2014-06-23 2014-06-23 FASTENING RING FOR AIR TREATMENT UNIT TURBINE WHEEL AND AIR TREATMENT UNIT COMPRISING SUCH A FIXING ELEMENT

Publications (2)

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EP2960523A1 true EP2960523A1 (en) 2015-12-30
EP2960523B1 EP2960523B1 (en) 2019-12-11

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EP15173042.1A Active EP2960523B1 (en) 2014-06-23 2015-06-22 Attachment ring for turbine wheel of an air treatment unit and air treatment unit comprising such an attachment element

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EP (1) EP2960523B1 (en)
FR (1) FR3022579B1 (en)
RU (1) RU2693498C2 (en)

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WO2017154764A1 (en) * 2016-03-08 2017-09-14 株式会社ヴァレオジャパン Blower

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US3240517A (en) * 1963-03-12 1966-03-15 Torrington Mfg Co Fan hub
US4009970A (en) * 1975-01-15 1977-03-01 Forth Jr Claude A Resilient fan hub
DE19708767A1 (en) 1996-03-04 1997-11-06 Bridgestone Corp Hub for mounting blades or wings on e.g. fan, ventilator or compressor
FR2837538A1 (en) * 2002-03-19 2003-09-26 Denso Corp Air blower for vehicle air conditioners, has radial bearing with inner ring that restricts relative movement of fan towards electric motor with respect to rotating shaft
US20090196685A1 (en) * 2008-01-31 2009-08-06 Trane International, Inc. Alignment Feature for Hub and Driveshaft Assembly

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Publication number Priority date Publication date Assignee Title
US2900202A (en) * 1957-07-12 1959-08-18 Meier Electric And Machine Com Propeller hub assembly
US3240517A (en) * 1963-03-12 1966-03-15 Torrington Mfg Co Fan hub
US4009970A (en) * 1975-01-15 1977-03-01 Forth Jr Claude A Resilient fan hub
DE19708767A1 (en) 1996-03-04 1997-11-06 Bridgestone Corp Hub for mounting blades or wings on e.g. fan, ventilator or compressor
FR2837538A1 (en) * 2002-03-19 2003-09-26 Denso Corp Air blower for vehicle air conditioners, has radial bearing with inner ring that restricts relative movement of fan towards electric motor with respect to rotating shaft
US20090196685A1 (en) * 2008-01-31 2009-08-06 Trane International, Inc. Alignment Feature for Hub and Driveshaft Assembly

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Publication number Priority date Publication date Assignee Title
WO2017154764A1 (en) * 2016-03-08 2017-09-14 株式会社ヴァレオジャパン Blower

Also Published As

Publication number Publication date
RU2015124164A (en) 2017-01-10
RU2693498C2 (en) 2019-07-03
FR3022579A1 (en) 2015-12-25
FR3022579B1 (en) 2018-11-30
EP2960523B1 (en) 2019-12-11
RU2015124164A3 (en) 2018-11-29

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