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)

Applications Claiming Priority (3)

Publications (2)

Family

ID=8869827

Family Applications (1)

Country Status (9)

Families Citing this family (131)

Family Cites Families (15)

• 2001
  • 2001-11-27 FR FR0115314A patent/FR2832770B1/fr not_active Expired - Fee Related
• 2002
  • 2002-11-08 AT AT02803822T patent/ATE354027T1/de not_active IP Right Cessation
  • 2002-11-08 DE DE60218205T patent/DE60218205T2/de not_active Expired - Lifetime
  • 2002-11-08 US US10/496,876 patent/US6960854B2/en not_active Expired - Lifetime
  • 2002-11-08 ES ES02803822T patent/ES2282517T3/es not_active Expired - Lifetime
  • 2002-11-08 CA CA2468465A patent/CA2468465C/en not_active Expired - Fee Related
  • 2002-11-08 EP EP02803822A patent/EP1448896B1/de not_active Expired - Lifetime
  • 2002-11-08 WO PCT/FR2002/003846 patent/WO2003046385A1/fr active IP Right Grant
  • 2002-11-08 JP JP2003547796A patent/JP4159992B2/ja not_active Expired - Fee Related

Non-Patent Citations (1)

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