EP1448896A1 - Centrifugal turbine for breathing-aid devices - Google Patents

Centrifugal turbine for breathing-aid devices

Info

Publication number
EP1448896A1
EP1448896A1 EP02803822A EP02803822A EP1448896A1 EP 1448896 A1 EP1448896 A1 EP 1448896A1 EP 02803822 A EP02803822 A EP 02803822A EP 02803822 A EP02803822 A EP 02803822A EP 1448896 A1 EP1448896 A1 EP 1448896A1
Authority
EP
European Patent Office
Prior art keywords
turbine
stator
rotor
wheel
blades
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
EP02803822A
Other languages
German (de)
French (fr)
Other versions
EP1448896B1 (en
Inventor
Hossein Nadjafizadeh
Philippe Perine
Pascal Liegeois
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.)
Mallinckrodt Developpement France SAS
Original Assignee
Mallinckrodt Developpement France SAS
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 Mallinckrodt Developpement France SAS filed Critical Mallinckrodt Developpement France SAS
Publication of EP1448896A1 publication Critical patent/EP1448896A1/en
Application granted granted Critical
Publication of EP1448896B1 publication Critical patent/EP1448896B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/06—Helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • 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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Definitions

  • the invention relates to motorized turbines intended for the production of a continuous flow of air and more particularly to turbines fitted to respiratory assistance devices.
  • These respiratory assistance devices can be provided to treat sleep apnea disorders.
  • devices comprising a respiratory mask applied to the nose and / or the mouth of a user during his sleep as well as a box supplying air in overpressure to this mask so as to prevent the user to enter apnea phase.
  • known respiratory assistance devices To supply the overpressure air to the respiratory mask, known respiratory assistance devices generally propose to deliver a continuous flow, regulated or not, of air by means of a turbine driven in rotation by an electric motor. This air flow is conveyed by a pipe to the mask which also has a calibrated leak orifice, the desired overpressure being thus maintained.
  • patent FR 2,663,547 describes such a device.
  • This document refers to an installation for the continuous supply of overpressure of respiratory gas comprising a respiratory mask with a calibrated orifice and a unit for the supply of overpressure gas connected by a hose to the mask.
  • a centrifugal type turbine powered by an electric motor is provided to generate an air flow.
  • a respiratory assistance device is intended, most of the time, for use at home. It must therefore be easily transportable and compact in order to be placed at the foot of the patient's bed or on a bedside table.
  • the object of the invention is to overcome these drawbacks of the prior art by providing a more compact motor-turbine assembly, allowing the production of respiratory assistance devices of reduced size.
  • the subject of the invention is an electric turbine comprising a turbine rotor, a turbine stator, an electric motor member intended to drive the rotor in rotation relative to the stator, said turbine having the following characteristics: -
  • the turbine stator comprises a stator body defining a generally toric compression chamber provided with an annular opening;
  • the turbine rotor comprises a set of blades generally extending radially from a central air intake formed by an annular intake duct towards the annular opening of the compression chamber of the turbine stator, this set of blades being secured to a shaft mounted coaxially rotatable in the turbine stator body;
  • the electric motor member comprises a toric motor stator housed and fixed in a motor housing of the turbine stator, in the center of the toric compression chamber and a motor rotor mounted and fixed on the turbine rotor shaft, axially in screw -to the motor stator.
  • One of the stator or motor rotor can be a permanent magnet, just as at least one of the stator or motor rotor can be a toroidal winding.
  • turbine rotor shaft can be mounted on at least one bearing coaxial with the annular intake duct as well as on at least one bearing located in the engine housing.
  • the stator body of the turbine may comprise two parts cooperating with each other and delimiting the toroidal compression chamber.
  • the blades can be carried by an overmolded wheel forming a sleeve on the turbine rotor shaft, said sleeve being able to comprise a shoulder intended for the axial support of the motor rotor.
  • Said wheel carrying the blades can also be frustoconical.
  • These blades carried by the wheel can be formed by a flat wall fixed perpendicular to the surface of the wheel, this wall having a generally trapezoidal shape and having a greater height in the central part of the wheel than in its peripheral part. .
  • some of said blades may include, in their part arranged in the central part of the wheel, a projecting spout intended to match the shape of the annular intake duct.
  • one blade out of two comprises such a projecting beak.
  • some of said blades form an angle of 5 to 60 degrees with the radius of the wheel passing through the end of the blade, at the periphery of the wheel.
  • FIG. 1 is a perspective view, in diametral section, of a turbine according to the invention
  • FIG. 2 is a front view, in diametral section, of the turbine of Figure 1;
  • FIG. 3 is an exploded view of the turbine of Figure 1;
  • - Figure 4 is a side view of the impeller of Figure 1;
  • FIGS. 1 to 3 are perspective views of the wheel of Figure 4.
  • the terms upper, lower, above, below, vertical, horizontal refer to the turbine in the position in which it is shown in FIGS. 1 to 3.
  • the turbine 1 shown in FIGS. 1, 2 and 3 comprises an upper body 2 assembled to a lower body 3, defining between them a volume in which take place a vertical shaft 4 mounted on two bearings 13, 14, a toroidal magnet 5, an O-ring coil 6, a wheel 7 carrying blades.
  • the upper body 2 has a cup shape comprising an inner annular skirt 16 (on the side of the lower body 3) coaxial with said cup and intended to form a motor housing as well as a semi-toric wall 22 located on the periphery of the cup .
  • the lower body 3 has a hollow shape delimited by a first annular wall 17 connected to a second conical wall 18 flaring upwards and itself connected to a connection wall 19 of cross-section in an arc of a circle.
  • the annular wall 17 surrounds a hub 20 intended for mounting the bearing 13, said hub 20 being rigidly positioned coaxially with the annular wall 17 by three fixed blades 21 connecting the inside of the annular wall to the outside of the hub and arranged at 120 ° from each other.
  • the upper 2 and lower 3 bodies are formed to constitute, once assembled, an internal volume characteristic of a centrifugal turbine, in particular, the walls 19, 22 of the upper 2 and lower 3 bodies delimit a toric compression chamber 12.
  • This chamber 12 is open to the outside via a tangential duct 25 substantially cylindrical (towards the mask of the user) whose longitudinal axis is horizontal.
  • the assembly of the upper 2 and lower 3 bodies is made in leaktight manner at a joint plane 8.
  • Nipples 9 emerging from the lower body 3 at the joint plane 8 are arranged to be introduced into corresponding orifices practiced in the upper body 2, thus ensuring the rigorous positioning of one body relative to the other. Maintaining the assembly is achieved by means of a series of screws 10 regularly arranged around the periphery of the joint plane.
  • the lower body 3 comprises a hub 20 placed coaxially inside the annular wall 17 and adjusted so that a first bearing 13 intended to support the vertical shaft 4 fits therein to be rigidly fixed.
  • the upper body 2 comprises a similar housing delimited by the skirt 16 and intended to receive a second bearing 14 supporting the vertical shaft 4 but, unlike the housing provided for the first bearing 13, this housing is adjusted to immobilize the second bearing 14 in its radial directions and to leave it free in translation in the vertical direction.
  • a spring 15 is provided inside the housing of the second bearing 14 and exerts a force between the latter and the upper body 2 so as to maintain a downward pressure on the bearing 14.
  • the wheel 7 carrying blades is also mounted on the vertical shaft 4 so as to be driven in rotation therewith. It may for example be overmolded, glued or force-fitted onto the shaft 4.
  • the wheel 7 carrying blades has a substantially conical shape allowing it to match the internal shape of the annular 17 and conical 18 walls of the lower body 3, the blades being arranged on the wheel 7 so as to cause the air to circulate it between the volume delimited by said annular wall M and the toric compression chamber 12, during the rotation of the vertical shaft 4.
  • annular skirt 16 receives a horizontal plate 23 rigidly fixed to its internal wall, these two elements delimiting the motor housing described above.
  • the motor housing is intended to receive the O-ring coil 6 and to keep it fixed relative to said body 2.
  • This housing is arranged in such a way that the coil 6, when it is in place by gluing or adjustment, is positioned as follows: - as regards positioning in the vertical direction: between the upper bearing 14 of the vertical shaft 4 and the wheel 7 carrying blades; - as regards positioning in the horizontal plane: the coil 6 coaxially surrounds the vertical shaft 4.
  • the vertical shaft 7 also carries the toroidal magnet 5 rigidly fixed and positioned as follows:
  • the toroidal magnet coaxially surrounds the vertical shaft 4.
  • the toroidal magnet 5 can be directly adjusted clamped or glued to the vertical shaft 4 or else, as shown in FIGS. 1 to 3, the wheel 7 carrying blades can adjust tightly or be glued to said axis 4 by enveloping it, the magnet 5 then being adjusted tight or glued to this envelope.
  • the shaft 4 When the vertical shaft 4, the coil 6 and the magnet 5 are in place in the volume formed by the upper 2 and lower 3 bodies assembled, these three elements are coaxial and the shaft 4 is capable of rotation along its axis longitudinal, when the magnet 5 is rotated relative to the coil 6.
  • the volume defined by the upper 2 and lower 3 bodies as well as by the wheel 7 comprises an annular inlet duct 11 open to the outside, coaxial with the vertical shaft 4 and delimited by the interior of the annular wall 17 and by the outer wall of the hub 20.
  • This annular intake duct 11 communicates over its entire circumference with a compression duct 24 delimited by the interior of the conical wall 18 and by the face of the wheel 7 carrying the blades.
  • This compression conduit 24 is therefore a frustoconical volume delimited by two coaxial cones flaring from the intake duct 11.
  • the compression conduit 24 is itself connected over its entire circumference to the toric compression chamber 12 mentioned above.
  • This toric compression chamber 12 is delimited by the wall 22 and the annular projection of the upper body 2, as well as by the wall 19 of the lower body 3, these elements being arranged to constitute an internal toric volume comprising a circular slot forming an annular opening. allowing communication with the compression conduit 24.
  • the blades 26, 27 act on the air essentially at the level of the compression duct 24 and also partially at the level of the annular intake duct 11.
  • the wheel 7 carries two types of blades 26, 27.
  • a first type of blades 26 is formed by a flat wall fixed perpendicular to the surface of the wheel, this wall having a generally trapezoidal shape and having a greater height in the central part of the wheel 7 than in its peripheral part. .
  • a second type of blade 27 is similar to the first type 26 but is longer so as to go further into the central part of the wheel 7.
  • the part of the blade disposed in this central part of the wheel 7 has a projecting spout intended to follow the shape of the junction between the intake duct 11 and the compression duct 24.
  • These two types of blades are also arranged so as to form an angle of 5 to 60 degrees with the radius of the wheel 7 passing through the end of the blade, at the periphery of the wheel 7, each type of blade can be arranged at a different angle from the other type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Centrifugal Separators (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The turbine has a rotor (7) running inside a stator (3) driven by an electric motor. The stator is shaped to form a toroidal compression chamber (12). The rotor has blades fixed to the rotor shaft (4). The electric motor has a toroidal stator (6) in a motor housing (16) formed inside the compression chamber of the stator, and the rotor (5) is mounted on the turbine rotor shaft.

Description

Turbine centrifuge pour dispositifs d'assistance respiratoire Centrifugal turbine for respiratory assistance devices
L'invention concerne les turbines motorisées destinées à la production d'un flux continu d'air et plus particulièrement les turbines équipant les dispositifs d'assistance respiratoire.The invention relates to motorized turbines intended for the production of a continuous flow of air and more particularly to turbines fitted to respiratory assistance devices.
Ces dispositifs d'assistance respiratoire peuvent être prévus pour traiter les troubles d'apnée du sommeil.These respiratory assistance devices can be provided to treat sleep apnea disorders.
Les patients souffrant de ces troubles sont susceptibles, durant leur temps de sommeil, de traverser des phases d'apnée durant lesquelles ils cessent de respirer, provoquant ainsi leur réveil.Patients suffering from these disorders are likely, during their sleep time, to go through periods of apnea during which they stop breathing, thus causing them to wake up.
Pour remédier à ces troubles, il existe des dispositifs comprenant un masque respiratoire appliqué sur le nez et/ou la bouche d'un utilisateur pendant son sommeil ainsi qu'un boîtier fournissant de l'air en surpression à ce masque de manière à empêcher l'utilisateur d'entrer en phase d'apnée.To remedy these disorders, there are devices comprising a respiratory mask applied to the nose and / or the mouth of a user during his sleep as well as a box supplying air in overpressure to this mask so as to prevent the user to enter apnea phase.
Pour fournir l'air en surpression au masque respiratoire, les dispositifs d'assistance respiratoire connus proposent généralement de délivrer un flux continu, régulé ou non, d'air grâce à une turbine entraînée en rotation par un moteur électrique. Ce flux d'air est acheminé par un tuyau jusque dans le masque qui comporte par ailleurs un orifice de fuite calibré, la surpression désirée étant ainsi maintenue.To supply the overpressure air to the respiratory mask, known respiratory assistance devices generally propose to deliver a continuous flow, regulated or not, of air by means of a turbine driven in rotation by an electric motor. This air flow is conveyed by a pipe to the mask which also has a calibrated leak orifice, the desired overpressure being thus maintained.
Par exemple, le brevet FR 2663 547 décrit un tel dispositif.For example, patent FR 2,663,547 describes such a device.
Ce document fait référence à une installation de fourniture en continu de surpression de gaz respiratoire comprenant un masque respiratoire à orifice calibré et une unité de fourniture de gaz en surpression reliée par un tuyau au masque. Au sein de l'unité de fourniture de gaz en surpression, une turbine de type centrifuge actionnée par un moteur électrique est prévue pour générer un débit d'air.This document refers to an installation for the continuous supply of overpressure of respiratory gas comprising a respiratory mask with a calibrated orifice and a unit for the supply of overpressure gas connected by a hose to the mask. Within the overpressure gas supply unit, a centrifugal type turbine powered by an electric motor is provided to generate an air flow.
Ces dispositifs de l'art antérieur présentent un inconvénient en ce qui concerne leur encombrement.These devices of the prior art have a drawback with regard to their size.
En effet, un dispositif d'assistance respiratoire est destiné, la plupart du temps, à une utilisation à domicile. Il doit donc être facilement transportable et peu encombrant afin d'être posé au pied du lit du patient ou sur une table de nuit.In fact, a respiratory assistance device is intended, most of the time, for use at home. It must therefore be easily transportable and compact in order to be placed at the foot of the patient's bed or on a bedside table.
Les dispositifs antérieurs, au fil du temps, ont été rendus de plus en plus compacts suivant l'évolution technologique. Néanmoins, il semblerait qu'une limite soit actuellement atteinte en ce qui concerne les dispositifs d'assistance respiratoire comportant un agencement classique de leurs éléments, tels que décrit dans le brevet cité précédemment.Previous devices, over time, have been made more and more compact according to technological evolution. Nevertheless, it would seem that a limit is currently reached with regard to respiratory assistance devices comprising a conventional arrangement of their elements, as described in the patent cited above.
Ceci tient en partie au fait que l'ensemble moteur-turbine occupe une place importante dans l'unité de fourniture de gaz en surpression de par sa structure en deux parties.This is partly due to the fact that the engine-turbine assembly occupies an important place in the overpressure gas supply unit due to its two-part structure.
Le but de l'invention est de pallier ces inconvénients de l'art antérieur en fournissant un ensemble moteur-turbine plus compact, permettant la réalisation de dispositifs d'assistance respiratoire d'encombrement réduit.The object of the invention is to overcome these drawbacks of the prior art by providing a more compact motor-turbine assembly, allowing the production of respiratory assistance devices of reduced size.
A cet effet, l'invention a pour objet une turbine électrique comprenant un rotor de turbine, un stator de turbine, un organe moteur électrique destiné à entraîner le rotor en rotation par rapport au stator, ladite turbine présentant les caractéristiques suivantes : - le stator de turbine comprend un corps de stator définissant une chambre de compression généralement torique munie d'une ouverture annulaire ;To this end, the subject of the invention is an electric turbine comprising a turbine rotor, a turbine stator, an electric motor member intended to drive the rotor in rotation relative to the stator, said turbine having the following characteristics: - The turbine stator comprises a stator body defining a generally toric compression chamber provided with an annular opening;
- le rotor de turbine comprend un ensemble de pales s'étendant généralement radialement depuis une prise d'air centrale formée par un conduit d'admission annulaire vers l'ouverture annulaire de la chambre de compression du stator de turbine, cet ensemble de pales étant solidaire d'un arbre monté coaxialement rotatif dans le corps de stator de turbine ;the turbine rotor comprises a set of blades generally extending radially from a central air intake formed by an annular intake duct towards the annular opening of the compression chamber of the turbine stator, this set of blades being secured to a shaft mounted coaxially rotatable in the turbine stator body;
- l'organe moteur électrique comprend un stator moteur torique logé et fixé dans un logement moteur du stator de turbine, au centre de la chambre de compression torique et un rotor moteur monté et fixé sur l'arbre de rotor de turbine, axialement en vis-à-vis du stator moteur.- the electric motor member comprises a toric motor stator housed and fixed in a motor housing of the turbine stator, in the center of the toric compression chamber and a motor rotor mounted and fixed on the turbine rotor shaft, axially in screw -to the motor stator.
L'un des stator ou rotor moteur peut être un aimant permanent, de même qu'au moins un des stator ou rotor moteur peuvent être un bobinage torique.One of the stator or motor rotor can be a permanent magnet, just as at least one of the stator or motor rotor can be a toroidal winding.
Par ailleurs, l'arbre de rotor de turbine peut-être monté sur au moins un palier coaxial au conduit d'admission annulaire ainsi que sur au moins un palier situé dans le logement moteur.Furthermore, the turbine rotor shaft can be mounted on at least one bearing coaxial with the annular intake duct as well as on at least one bearing located in the engine housing.
Le corps de stator de la turbine peut comprendre deux parties coopérant entre elles et délimitant la chambre de compression torique.The stator body of the turbine may comprise two parts cooperating with each other and delimiting the toroidal compression chamber.
Les pales peuvent être portées par une roue surmoulée formant un manchon sur l'arbre de rotor de turbine, ledit manchon pouvant comprendre un épaulement destiné à l'appui axial du rotor moteur. Ladite roue portant les pales peut également être tronconique.The blades can be carried by an overmolded wheel forming a sleeve on the turbine rotor shaft, said sleeve being able to comprise a shoulder intended for the axial support of the motor rotor. Said wheel carrying the blades can also be frustoconical.
Ces pales portées par la roue peuvent être formées d'une paroi plane fixée perpendiculairement à la surface de la roue, cette paroi ayant une forme généralement trapézoïdale et disposant d'une hauteur plus grande dans la partie centrale de la roue que dans sa partie périphérique.These blades carried by the wheel can be formed by a flat wall fixed perpendicular to the surface of the wheel, this wall having a generally trapezoidal shape and having a greater height in the central part of the wheel than in its peripheral part. .
De plus, certaines desdites pales peuvent comprendre, dans leur partie disposée dans la partie centrale de la roue, un bec en saillie destiné à épouser la forme du conduit d'admission annulaire.In addition, some of said blades may include, in their part arranged in the central part of the wheel, a projecting spout intended to match the shape of the annular intake duct.
Dans un mode de réalisation, une pale sur deux comprend un tel bec en saillie.In one embodiment, one blade out of two comprises such a projecting beak.
Selon un autre mode de réalisation, certaines desdites pales forment un angle de 5 à 60 degrés avec le rayon de la roue passant par l'extrémité de la pale, au niveau de la périphérie de la roue.According to another embodiment, some of said blades form an angle of 5 to 60 degrees with the radius of the wheel passing through the end of the blade, at the periphery of the wheel.
D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après relative aux dessins annexés, donnés à titre d'exemple non limitatif : - la figure 1 est une vue en perspective, en coupe diamétrale, d'une turbine selon l'invention ;Other features and advantages of the invention will appear in the following description relating to the accompanying drawings, given by way of nonlimiting example: - Figure 1 is a perspective view, in diametral section, of a turbine according to the invention;
- la figure 2 est une vue de face, en coupe diamétrale, de la turbine de la figure 1 ;- Figure 2 is a front view, in diametral section, of the turbine of Figure 1;
- la figure 3 est une vue éclatée de la turbine de la figure 1 ; - la figure 4 est une vue de côté de la roue de la turbine de la figure 1 ;- Figure 3 is an exploded view of the turbine of Figure 1; - Figure 4 is a side view of the impeller of Figure 1;
- la figure 5 est une vue en perspective de la roue de la figure 4. Dans la description suivante, les termes supérieur, inférieur, au-dessus, en dessous, vertical, horizontal font référence à la turbine dans la position où elle se trouve représentée dans les figures 1 à 3.- Figure 5 is a perspective view of the wheel of Figure 4. In the following description, the terms upper, lower, above, below, vertical, horizontal refer to the turbine in the position in which it is shown in FIGS. 1 to 3.
La turbine 1 représentée sur les figures 1 , 2 et 3 comprend un corps supérieur 2 assemblé à un corps inférieur 3, définissant entre eux un volume dans lequel prennent place un arbre vertical 4 monté sur deux roulements 13, 14, un aimant torique 5, une bobine torique 6, une roue 7 portant des pales.The turbine 1 shown in FIGS. 1, 2 and 3 comprises an upper body 2 assembled to a lower body 3, defining between them a volume in which take place a vertical shaft 4 mounted on two bearings 13, 14, a toroidal magnet 5, an O-ring coil 6, a wheel 7 carrying blades.
Le corps supérieur 2 a une forme de coupelle comprenant une jupe annulaire intérieure 16 (du côté du corps inférieur 3) coaxiale à ladite coupelle et destinée à former un logement moteur ainsi qu'une paroi demi-torique 22 située sur la périphérie de la coupelle.The upper body 2 has a cup shape comprising an inner annular skirt 16 (on the side of the lower body 3) coaxial with said cup and intended to form a motor housing as well as a semi-toric wall 22 located on the periphery of the cup .
Le corps inférieur 3 a une forme creuse délimitée par une première paroi annulaire 17 reliée à une seconde paroi conique 18 s'évasant vers le haut et reliée elle-même à une paroi 19 de raccordement à section en arc de cercle.The lower body 3 has a hollow shape delimited by a first annular wall 17 connected to a second conical wall 18 flaring upwards and itself connected to a connection wall 19 of cross-section in an arc of a circle.
La paroi annulaire 17 entoure un moyeu 20 destiné au montage du roulement 13, ledit moyeu 20 étant positionné de manière rigide coaxialement à la paroi annulaire 17 par trois pales fixes 21 reliant l'intérieur de la paroi annulaire à l'extérieur du moyeu et disposées à 120° les unes des autres.The annular wall 17 surrounds a hub 20 intended for mounting the bearing 13, said hub 20 being rigidly positioned coaxially with the annular wall 17 by three fixed blades 21 connecting the inside of the annular wall to the outside of the hub and arranged at 120 ° from each other.
Les corps supérieur 2 et inférieur 3 sont formés pour constituer, une fois assemblés, un volume interne caractéristique d'une turbine centrifuge, notamment, les parois 19, 22 des corps supérieur 2 et inférieur 3 délimitent une chambre de compression torique 12. Cette chambre 12 est ouverte sur l'extérieur par l'intermédiaire d'un conduit tangentiel 25 sensiblement cylindrique (vers le masque de l'utilisateur) dont l'axe longitudinal est horizontal.The upper 2 and lower 3 bodies are formed to constitute, once assembled, an internal volume characteristic of a centrifugal turbine, in particular, the walls 19, 22 of the upper 2 and lower 3 bodies delimit a toric compression chamber 12. This chamber 12 is open to the outside via a tangential duct 25 substantially cylindrical (towards the mask of the user) whose longitudinal axis is horizontal.
L'assemblage des corps supérieur 2 et inférieur 3 est réalisé de manière étanche au niveau d'un plan de joint 8. Des tétons 9 émergeant du corps inférieur 3 au niveau du plan de joint 8 sont agencés pour s'introduire dans des orifices correspondants pratiqués dans le corps supérieur 2, assurant ainsi le positionnement rigoureux d'un corps par rapport à l'autre. Le maintien de l'assemblage est réalisé au moyen d'une série de vis 10 disposées régulièrement sur le pourtour du plan de joint.The assembly of the upper 2 and lower 3 bodies is made in leaktight manner at a joint plane 8. Nipples 9 emerging from the lower body 3 at the joint plane 8 are arranged to be introduced into corresponding orifices practiced in the upper body 2, thus ensuring the rigorous positioning of one body relative to the other. Maintaining the assembly is achieved by means of a series of screws 10 regularly arranged around the periphery of the joint plane.
Tel qu'évoqué précédemment, le corps inférieur 3 comprend un moyeu 20 placé coaxialement à l'intérieur de la paroi annulaire 17 et ajusté pour qu'un premier roulement 13 destiné à supporter l'arbre vertical 4 s'y emmanche pour y être rigidement fixé.As mentioned above, the lower body 3 comprises a hub 20 placed coaxially inside the annular wall 17 and adjusted so that a first bearing 13 intended to support the vertical shaft 4 fits therein to be rigidly fixed.
De même, le corps supérieur 2 comprend un logement similaire délimité par la jupe 16 et destiné à recevoir un second roulement 14 supportant l'arbre vertical 4 mais, à la différence du logement prévu pour le premier roulement 13, ce logement est ajusté pour immobiliser le second roulement 14 selon ses directions radiales et pour le laisser libre en translation selon la direction verticale.Likewise, the upper body 2 comprises a similar housing delimited by the skirt 16 and intended to receive a second bearing 14 supporting the vertical shaft 4 but, unlike the housing provided for the first bearing 13, this housing is adjusted to immobilize the second bearing 14 in its radial directions and to leave it free in translation in the vertical direction.
Un ressort 15 est prévu à l'intérieur du logement du second roulement 14 et exerce une force entre ce dernier et le corps supérieur 2 de façon à maintenir une pression vers le bas sur le roulement 14. L'arbre vertical 4, sur les extrémités duquel sont montés les deux roulements 13, 14, prend donc place entre les corps supérieur 2 et inférieur 3 de manière à se trouver coaxial avec le conduit d'admission annulaire 11 et la chambre de compression torique 12 formée par l'assemblage des corps supérieur 2 et inférieur 3.A spring 15 is provided inside the housing of the second bearing 14 and exerts a force between the latter and the upper body 2 so as to maintain a downward pressure on the bearing 14. The vertical shaft 4, on the ends of which the two bearings 13, 14 are mounted, therefore takes place between the upper 2 and lower 3 bodies so as to be coaxial with the annular intake duct 11 and the toric compression chamber 12 formed by the assembly of the upper 2 and lower 3 bodies.
La roue 7 portant des pales est également montée sur l'arbre vertical 4 de façon à être entraînée en rotation avec celui-ci. Elle peut-être par exemple surmoulée, collée ou emmanchée en force sur l'arbre 4.The wheel 7 carrying blades is also mounted on the vertical shaft 4 so as to be driven in rotation therewith. It may for example be overmolded, glued or force-fitted onto the shaft 4.
Dans la réalisation présentée, la roue 7 portant des pales a une forme sensiblement conique lui permettant d'épouser la forme interne des parois annulaire 17 et conique 18 du corps inférieur 3, les pales étant disposées sur la roue 7 de telle sorte à entraîner l'air pour le faire circuler entre le volume délimité par ladite paroi annulaire M et la chambre de compression torique 12, lors de la rotation de l'arbre vertical 4.In the embodiment shown, the wheel 7 carrying blades has a substantially conical shape allowing it to match the internal shape of the annular 17 and conical 18 walls of the lower body 3, the blades being arranged on the wheel 7 so as to cause the air to circulate it between the volume delimited by said annular wall M and the toric compression chamber 12, during the rotation of the vertical shaft 4.
D'autre part, la jupe annulaire 16 reçoit un plateau horizontal 23 rigidement fixé à sa paroi interne, ces deux éléments délimitant le logement moteur précédemment décrit.On the other hand, the annular skirt 16 receives a horizontal plate 23 rigidly fixed to its internal wall, these two elements delimiting the motor housing described above.
Le logement moteur est destiné à recevoir la bobine torique 6 et à la maintenir fixe par rapport audit corps 2.The motor housing is intended to receive the O-ring coil 6 and to keep it fixed relative to said body 2.
Ce logement est disposé de telle manière que la bobine 6, lorsqu'elle est en place par collage ou ajustement, soit positionnée comme suit : - pour ce qui est du positionnement suivant la direction verticale : entre le roulement supérieur 14 de l'arbre vertical 4 et la roue 7 portant des pales ; - pour ce qui est du positionnement dans le plan horizontal : la bobine 6 entoure coaxialement l'arbre vertical 4.This housing is arranged in such a way that the coil 6, when it is in place by gluing or adjustment, is positioned as follows: - as regards positioning in the vertical direction: between the upper bearing 14 of the vertical shaft 4 and the wheel 7 carrying blades; - as regards positioning in the horizontal plane: the coil 6 coaxially surrounds the vertical shaft 4.
L'arbre vertical 7 porte en outre l'aimant torique 5 rigidement fixé et positionné comme suit :The vertical shaft 7 also carries the toroidal magnet 5 rigidly fixed and positioned as follows:
- pour ce qui est du positionnement suivant la direction verticale : sensiblement en regard de la bobine 6, entouré par celle-ci ;- in terms of positioning in the vertical direction: substantially opposite the coil 6, surrounded by it;
- pour ce qui est du positionnement dans le plan horizontal : l'aimant torique entoure coaxialement l'arbre vertical 4.- as regards positioning in the horizontal plane: the toroidal magnet coaxially surrounds the vertical shaft 4.
L'aimant torique 5 peut être directement ajusté serré ou collé sur l'arbre vertical 4 ou bien, tel que représenté sur les figures 1 à 3, la roue 7 portant des pales peut s'ajuster serré ou être collée sur ledit axe 4 en l'enveloppant, l'aimant 5 étant alors ajusté serré ou collé sur cette enveloppe.The toroidal magnet 5 can be directly adjusted clamped or glued to the vertical shaft 4 or else, as shown in FIGS. 1 to 3, the wheel 7 carrying blades can adjust tightly or be glued to said axis 4 by enveloping it, the magnet 5 then being adjusted tight or glued to this envelope.
Lorsque l'arbre vertical 4, la bobine 6 et l'aimant 5 sont en place dans le volume formé par les corps supérieur 2 et inférieur 3 assemblés, ces trois éléments sont coaxiaux et l'arbre 4 est apte à une rotation selon son axe longitudinal, lorsque l'aimant 5 est mis en rotation par rapport à la bobine 6.When the vertical shaft 4, the coil 6 and the magnet 5 are in place in the volume formed by the upper 2 and lower 3 bodies assembled, these three elements are coaxial and the shaft 4 is capable of rotation along its axis longitudinal, when the magnet 5 is rotated relative to the coil 6.
Le volume défini par les corps supérieurs 2 et inférieurs 3 ainsi que par la roue 7 comprend un conduit d'admission annulaire 11 ouvert sur l'extérieur, coaxial avec l'arbre vertical 4 et délimité par l'intérieur de la paroi annulaire 17 et par la paroi externe du moyeu 20.The volume defined by the upper 2 and lower 3 bodies as well as by the wheel 7 comprises an annular inlet duct 11 open to the outside, coaxial with the vertical shaft 4 and delimited by the interior of the annular wall 17 and by the outer wall of the hub 20.
Ce conduit d'admission annulaire 11 communique sur toute sa circonférence avec un conduit de compression 24 délimité par l'intérieur de la paroi conique 18 et par la face de la roue 7 portant les pales. Ce conduit de compression 24 est donc un volume tronconique délimité par deux cônes coaxiaux s'évasant à partir du conduit d'admission 11.This annular intake duct 11 communicates over its entire circumference with a compression duct 24 delimited by the interior of the conical wall 18 and by the face of the wheel 7 carrying the blades. This compression conduit 24 is therefore a frustoconical volume delimited by two coaxial cones flaring from the intake duct 11.
Le conduit de compression 24 est lui-même relié sur toute sa circonférence à la chambre de compression torique 12 évoquée précédemment.The compression conduit 24 is itself connected over its entire circumference to the toric compression chamber 12 mentioned above.
Cette chambre de compression torique 12 est délimitée par la paroi 22 et la saillie annulaire du corps supérieur 2, ainsi que par la paroi 19 du corps inférieur 3, ces éléments étant agencés pour constituer un volume interne torique comprenant une fente circulaire formant une ouverture annulaire permettant la communication avec le conduit de compression 24.This toric compression chamber 12 is delimited by the wall 22 and the annular projection of the upper body 2, as well as by the wall 19 of the lower body 3, these elements being arranged to constitute an internal toric volume comprising a circular slot forming an annular opening. allowing communication with the compression conduit 24.
Lorsque la roue 7 est montée dans la turbine 1, les pales 26, 27 agissent sur l'air essentiellement au niveau du conduit de compression 24 et aussi partiellement au niveau du conduit d'admission annulaire 11.When the wheel 7 is mounted in the turbine 1, the blades 26, 27 act on the air essentially at the level of the compression duct 24 and also partially at the level of the annular intake duct 11.
En effet, la roue 7 porte deux types de pales 26, 27.In fact, the wheel 7 carries two types of blades 26, 27.
Un premier type de pales 26 est formé d'une paroi plane fixée perpendiculairement à la surface de la roue, cette paroi ayant une forme généralement trapézoïdale et disposant d'une hauteur plus grande dans la partie centrale de la roue 7 que dans sa partie périphérique.A first type of blades 26 is formed by a flat wall fixed perpendicular to the surface of the wheel, this wall having a generally trapezoidal shape and having a greater height in the central part of the wheel 7 than in its peripheral part. .
Un second type de pales 27 est similaire au premier type 26 mais est plus longue de manière à aller plus loin dans la partie centrale de la roue 7. D'autre part, la partie de la pale disposée dans cette partie centrale de la roue 7 présente un bec en saillie destiné à épouser la forme de la jonction entre le conduit d'admission 11 et le conduit de compression 24. Ces deux types de pales sont par ailleurs disposés de façon à former un angle de 5 à 60 degrés avec le rayon de la roue 7 passant par l'extrémité de la pale, au niveau de la périphérie de la roue 7, chaque type de pale pouvant être disposé avec un angle différent de l'autre type. A second type of blade 27 is similar to the first type 26 but is longer so as to go further into the central part of the wheel 7. On the other hand, the part of the blade disposed in this central part of the wheel 7 has a projecting spout intended to follow the shape of the junction between the intake duct 11 and the compression duct 24. These two types of blades are also arranged so as to form an angle of 5 to 60 degrees with the radius of the wheel 7 passing through the end of the blade, at the periphery of the wheel 7, each type of blade can be arranged at a different angle from the other type.

Claims

REVENDICATIONS
1. Turbine électrique 1 comprenant un rotor de turbine (4, 7), un stator de turbine (2, 3), un organe moteur électrique (5, 6) destiné à entraîner le rotor (4, 7) en rotation par rapport au stator (2, 3), caractérisé en ce que le stator de turbine (2, 3) comprend un corps de stator définissant une chambre de compression (12) généralement torique munie d'une ouverture annulaire ; - le rotor de turbine (4, 7) comprend un ensemble de pales1. Electric turbine 1 comprising a turbine rotor (4, 7), a turbine stator (2, 3), an electric motor member (5, 6) intended to drive the rotor (4, 7) in rotation relative to the stator (2, 3), characterized in that the turbine stator (2, 3) comprises a stator body defining a generally toric compression chamber (12) provided with an annular opening; - the turbine rotor (4, 7) comprises a set of blades
(26, 27) s'étendant généralement radialement depuis une prise d'air centrale formée par un conduit d'admission annulaire (11) vers l'ouverture annulaire de la chambre de compression (12) du stator de turbine (2, 3), cet ensemble de pales (26, 27) étant solidaire d'un arbre (4) monté coaxialement rotatif dans le corps de stator de turbine ; l'organe moteur électrique (5, 6) comprend un stator moteur (6) torique logé et fixé dans un logement moteur (16, 23) du stator de turbine (2, 3), au centre de la chambre de compression torique (12) et un rotor moteur (5) monté et fixé sur l'arbre (4) de rotor de turbine, axialement en vis-à-vis du stator moteur (6).(26, 27) extending generally radially from a central air intake formed by an annular intake duct (11) towards the annular opening of the compression chamber (12) of the turbine stator (2, 3) , this set of blades (26, 27) being integral with a shaft (4) mounted coaxially rotating in the turbine stator body; the electric motor member (5, 6) comprises a toric motor stator (6) housed and fixed in a motor housing (16, 23) of the turbine stator (2, 3), in the center of the toric compression chamber (12 ) and a motor rotor (5) mounted and fixed on the turbine rotor shaft (4), axially opposite the motor stator (6).
2. Turbine selon la revendication 1, caractérisée en ce qu'un des stator (6) ou rotor (5) moteur est un aimant permanent.2. Turbine according to claim 1, characterized in that one of the stator (6) or rotor (5) motor is a permanent magnet.
3. Turbine selon la revendication 1 ou 2, caractérisée en ce qu'au moins un des stator (6) ou rotor (5) moteur est ou sont un bobinage torique.3. Turbine according to claim 1 or 2, characterized in that at least one of the stator (6) or rotor (5) motor is or are a toroidal winding.
4. Turbine selon les revendications 1 à 3, caractérisée en ce que l'arbre (4) de rotor de turbine est monté sur au moins un palier coaxial (13, 20) au conduit d'admission annulaire (11).4. Turbine according to claims 1 to 3, characterized in that the shaft (4) of the turbine rotor is mounted on at least a coaxial bearing (13, 20) to the annular intake duct (11).
5. Turbine selon les revendications 1 à 4, caractérisée en ce que l'arbre (4) de rotor de turbine est monté sur au moins un palier (14) situé dans le logement moteur.5. Turbine according to claims 1 to 4, characterized in that the shaft (4) of the turbine rotor is mounted on at least one bearing (14) located in the engine housing.
6. Turbine selon les revendications 1 à 5, caractérisée en ce que le corps de stator (2, 3) comprend deux parties coopérant entre elles et délimitant la chambre de compression torique (12).6. Turbine according to claims 1 to 5, characterized in that the stator body (2, 3) comprises two parts cooperating with each other and delimiting the toric compression chamber (12).
7. Turbine selon les revendications 1 à 6, caractérisée en ce que les pales (26, 27) sont portées par une roue (7) surmoulée formant un manchon sur l'arbre (4) de rotor de turbine.7. Turbine according to claims 1 to 6, characterized in that the blades (26, 27) are carried by a molded wheel (7) forming a sleeve on the shaft (4) of the turbine rotor.
8. Turbine selon la revendication 7, caractérisée en ce que ledit manchon comprend un épaulement destiné à l'appui axial du rotor moteur (5).8. Turbine according to claim 7, characterized in that said sleeve comprises a shoulder intended for the axial support of the motor rotor (5).
9. Turbine selon l'une des revendications 1 à 8, caractérisée en ce que les pales (26, 27) sont portées par une roue (7) tronconique.9. Turbine according to one of claims 1 to 8, characterized in that the blades (26, 27) are carried by a frustoconical wheel (7).
10. Turbine selon la revendication 9, caractérisée en ce que les pales (26, 27) sont formées d'une paroi plane fixée perpendiculairement à la surface de la roue (7), cette paroi ayant une forme généralement trapézoïdale et disposant d'une hauteur plus grande dans la partie centrale de la roue (7) que dans sa partie périphérique. 10. Turbine according to claim 9, characterized in that the blades (26, 27) are formed of a flat wall fixed perpendicular to the surface of the wheel (7), this wall having a generally trapezoidal shape and having a greater height in the central part of the wheel (7) than in its peripheral part.
11. Turbine selon la revendication 10, caractérisée en ce qu'au moins certaines (27) desdites pales (26, 27) comprennent, dans leur partie disposée dans la partie centrale de la roue, un bec en saillie destiné à épouser la forme du conduit d'admission annulaire (11).11. Turbine according to claim 10, characterized in that at least some (27) of said blades (26, 27) comprise, in their part arranged in the central part of the wheel, a projecting spout intended to follow the shape of the annular intake duct (11).
12. Turbine selon la revendication 11, caractérisée en ce qu'une pale sur deux comprennent, dans leur partie disposée dans la partie centrale de la roue (7), un bec en saillie destiné à épouser la forme du conduit d'admission annulaire (11).12. Turbine according to claim 11, characterized in that one blade out of two comprise, in their part arranged in the central part of the wheel (7), a projecting spout intended to match the shape of the annular intake duct ( 11).
13. Turbine selon l'une des revendications 9 à 12, caractérisée en ce que certaines desdites pales (26, 27) forment un angle de 5 à 60 degrés avec le rayon de la roue (7) passant par l'extrémité de la pale, au niveau de la périphérie de la roue (7). 13. Turbine according to one of claims 9 to 12, characterized in that some of said blades (26, 27) form an angle of 5 to 60 degrees with the radius of the wheel (7) passing through the end of the blade , at the periphery of the wheel (7).
EP02803822A 2001-11-27 2002-11-08 Centrifugal turbine for breathing-aid devices Expired - Lifetime EP1448896B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0115314 2001-11-27
FR0115314A FR2832770B1 (en) 2001-11-27 2001-11-27 CENTRIFUGAL TURBINE FOR BREATHING ASSISTANCE DEVICES
PCT/FR2002/003846 WO2003046385A1 (en) 2001-11-27 2002-11-08 Centrifugal turbine for breathing-aid devices

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EP1448896A1 true EP1448896A1 (en) 2004-08-25
EP1448896B1 EP1448896B1 (en) 2007-02-14

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AT (1) ATE354027T1 (en)
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DE (1) DE60218205T2 (en)
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US20050036887A1 (en) 2005-02-17
FR2832770B1 (en) 2004-01-02
CA2468465A1 (en) 2003-06-05
ES2282517T3 (en) 2007-10-16
ATE354027T1 (en) 2007-03-15
WO2003046385A1 (en) 2003-06-05
DE60218205D1 (en) 2007-03-29
EP1448896B1 (en) 2007-02-14
FR2832770A1 (en) 2003-05-30
JP4159992B2 (en) 2008-10-01
US6960854B2 (en) 2005-11-01
CA2468465C (en) 2011-01-11
DE60218205T2 (en) 2007-11-22

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