Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
  • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
  • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
• • 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
  • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
  • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Definitions

• the present invention relates to the field of heating, ventilation and / or air conditioning devices for motor vehicles.
• the invention relates more particularly to an electric motor support for a fan.
• the invention also relates to a fan comprising such a motor support and a heating, ventilation and / or air conditioning installation comprising such a fan.
• a heating, ventilation and / or air conditioning installation which creates an air flow in the passenger compartment.
• Such an installation also makes it possible to manage the temperature and the distribution within the passenger compartment of the vehicles of the air flow created.
• a heating, ventilation and / or air conditioning installation comprises, among other things, a fan comprising a fan wheel driven in rotation by an electric motor.
• the electric motor is in particular electronically commutated, controlled by a power supply module.
• An electronically commutated electric motor or brushless direct current motor (also known as “brushless”), comprises a rotor and stator assembly, each of these components carrying electromagnetic elements including This interaction generates the displacement of the rotor relative to the stator, and further the displacement of the fan wheel 25.
• the electric motor is assembled in the heating, ventilation and / or air conditioning installation by means of a motor support which comprises an inner ring configured to accommodate the stator of the electric motor and an outer ring suitable for being attached, directly or indirectly, to a structural element of the vehicle.
• a decoupling element is interposed between the inner ring and the outer ring. This decoupling element aims to limit, or even prevent, the transmission of vibrations and / or stresses generated due to the rotation of the electric motor, from the inner ring, to the outer ring. This reduces the transmission of vibrations to the heating, ventilation and / or air conditioning installation, which could be felt by the occupants of the vehicle.
• the decoupling element generally allows relative movement of the inner ring relative to the outer ring in a plane normal to an axis common to the two rings. These vibrations propagating in this plane are thus filtered, and only a small residual part can propagate in the passenger compartment of the vehicle and adversely affect the comfort of the occupants.
• the object of the present invention is to provide an engine support, in particular for a fan of a heating, ventilation and / or air conditioning installation of a motor vehicle, which is simple to produce and which does not present minus some of the disadvantages of prior art media.
• the invention relates to a motor support, in particular for a motor-fan unit of a fan for heating, ventilation and / or air conditioning installation for a vehicle, comprising: two coaxial rings, one ring of which inner suitable for receiving one or more elements of the engine and an outer ring suitable for being fixed to a housing forming a structural element, a first decoupling means for limiting a relative movement of the two rings in a plane normal to the common axis of the two rings, and a second decoupling means for limiting a relative movement of the two rings in the direction of the common axis of the two rings.
• the motor support comprises one or more of the following characteristics, taken alone or in combination:
• the first decoupling means comprises a plurality of first elastic pads, disposed radially between the inner ring and the outer ring and / or an elastic ring between the two rings, the elastic ring preferably being made of elastomeric material, the elastic ring being of preferably still overmolded on the two rings;
• the first decoupling means comprises a plurality of first elastic pads and an elastic ring, the first pads being integral with the elastic ring;
• the second decoupling means comprises a plurality of second elastic pads disposed axially between the two rings;
• each second elastic pad has an "H” section such that each arm of the "H" is in contact with a respective ring;
• each second stud has the shape of two half-cylinders joined by their cylindrical surfaces, the flat surface of each half-cylinder being in contact with a respective ring, the two half-cylinders preferably extending along parallel axes, of more preferably along axes perpendicular to the common axis of the two rings;
• the motor support comprises at least one element for limiting the tilting of the inner ring relative to the outer ring, the element for limiting the tilting comprising at least one finger which protrudes from a first of the two rings and is housed in a housing formed in the second of the two rings, each second stud extending between a finger of the first ring and a wall of the associated housing in the second ring, normal to the common axis of the rings; a second stud extends between each of the fingers of the first ring and the walls of the housing associated with the second ring, normal to the common axis of the rings; each second pad is compressed axially, the compression ratio of each second pad preferably being greater than or equal to 5% and less than or equal to 15%, more preferably still substantially equal to 10%;
• the first decoupling means comprising an elastic ring
• the second studs are integral with the elastic ring
• the motor support preferably comprising at least two opposite radial stops relative to the center of the rings, more preferably at least three radial stops regularly distributed angularly around of the common axis of the two rings;
• the finger is included, in the direction of the common axis of the two rings, between the two second studs;
• the second pads associated with the same finger are identical, all the second pads being preferably still identical; - the two opposite faces of each finger, facing the surfaces of the housing, normal to the axis of the rings, are flat;
• the elastic ring of the first decoupling means is made of SEBS (polystyrene-b-poly (ethylene-butylene) -b-polystyrene) or silicone;
• the elastic ring of the first decoupling means is made of an elastomeric material having a hardness of between 25 and 50 Shore;
• each finger has a cross section in H.
• a fan in particular for heating, ventilation and / or air conditioning installation for a vehicle, comprising an electric motor, in particular a brushless electric motor, a fan wheel, driven in rotation by the electric motor, and a motor support as described above in all its combinations, the motor, in particular the stator of the motor, being fixed on the inner ring of the motor support.
• a heating, ventilation and / or air conditioning installation for a motor vehicle comprising a duct and a fan as described above in all its combinations, the fan wheel being in the conduit.
• FIG. 1 is a schematic side view of an example of a fan for a heating, ventilation and / or air conditioning installation for a motor vehicle.
• FIG. 2 is a schematic perspective view of a subassembly of the fan of Figure 1, including a motor mount and a fan housing.
• FIG. 3 is a schematic perspective view of a sub-assembly of the engine support of Figure 2.
• FIG. 4 is a schematic side view of a detail of the sub-assembly of Figure 5.
• FIG. 5 is a schematic side view of a variant of the detail of the sub-assembly of Figure 3.
• FIG 1 schematically illustrates a side view of a fan 10 for a heating, ventilation and / or air conditioning installation for a motor vehicle.
• a heating, ventilation and / or air conditioning installation for a motor vehicle comprises an aeration circuit, a fan 10 to set the air in motion in the aeration circuit, and means for heating and / or means for cooling the flow of air set in motion by the fan device 10.
• the fan 10 essentially comprises a fan wheel 12 and an electric motor 14, here masked by a motor cover 16, to drive in rotation about its axis A, the fan wheel 12.
• the electric motor 14 is for example a brushless motor.
• the fan 10 also comprises a motor support 18 making it possible to assemble the electric motor 14 on a support.
• the electric motor 14 is connected to a deflector 20 of the motor support 18, the deflector 20 forming part of the aeration circuit of the heating, ventilation and / or air conditioning installation.
• the motor support 18 essentially comprises an inner ring 22, an outer ring 24 and a decoupling element 26 interposed between the inner ring 22 and the outer ring 24.
• the decoupling element 26 aims to limit the transmission of vibrations from one of the two rings 22, 24 to the other of the two rings 22, 24.
• the decoupling element 26 here forms a first decoupling means 28, intended to limit a relative movement of the two rings 22, 24 in a common plane P of extension of the two rings 22, 24.
• the common plane P d The extension of the two rings 22, 24 is here normal to the axis A of rotation of the fan wheel 12.
• the first decoupling means 28 comprises, in the example illustrated, an elastic ring 30.
• the elastic ring is here made of an elastomeric material.
• the elastomeric material is SEBS (polystyrene-b-poly (ethylene-butylene) -b-polystyrene).
• the elastic ring 30 can be made of silicone.
• the inner 24, outer 24 and elastic 30 rings are here coaxial, with a common axis, the axis of rotation A of the fan wheel 12.
• a common axis the axis of rotation A of the fan wheel 12.
• this axis A in fact corresponds to the axis common to the inner ring 22, to the outer ring 24 and to the elastic ring 30.
• the elastic ring 30 is for example overmolded on the inner 22 and outer rings 24.
• the resilient ring 30 thus secures the inner 22 and outer 24 rings.
• the resilient ring 30 covers in particular here the radially inner surface of the outer ring 24 , oriented towards the inner ring 22, and the radially outer surface of the inner ring 22, oriented towards the outer ring 24.
• the first decoupling means 28 also comprises, in the example illustrated, a plurality of first elastic pads 32.
• the first pads 32 are here interposed between the inner ring 22 and the outer ring 24.
• Each first stud 32 here has an "H" section, the lateral arms of which are oriented in an orthoradial direction with respect to the axis A of rotation of the fan wheel 12, and of which the core is oriented in a radial direction with respect to to the axis A of rotation of the fan wheel 12.
• each first stud 32 is flush with the inner ring 22 and / or the outer ring 24, in the direction of the axis A of rotation of the fan wheel. fan 12. Sharp edges are thus avoided in the decoupling element 26, which are liable to create the initiation of rupture of the decoupling element 26.
• Each first pad 32 has for example a thickness, measured in the direction of the axis A of rotation of the fan wheel 12, greater than or equal to 10 mm, preferably greater than or equal to 14 mm, and / or less than or equal to 20 mm, preferably less than or equal to 16 mm.
• the first decoupling means 28 comprises six first elastic pads 32, associated in pairs of neighboring first pads 32.
• the three pairs of neighboring first pads 32 are regularly angularly distributed around the axis A of rotation of the fan wheel 12.
• the first pads 32 are for example made of elastomeric material.
• the elastomeric material is SEBS (polystyrene-b-poly (ethylene-butylene) -b-polystyrene).
• the elastic pads 32 can be made of silicone.
• the first pads 32 are integral with the elastic ring 30.
• the inner ring 22 is present on its radially outer surface has at least one relief 22i projecting towards the outer ring 24 forming a radial stop.
• the outer ring 24 has on its radially inner surface at least one relief 24i projecting towards the inner ring 24 forming a radial stop.
• the reliefs 22i, 24i of the inner and outer rings 22, 24 are aligned two by two in a radial direction. This makes it possible to limit the clearance of the inner rings 22 and exterior 24.
• each ring 22, 24 comprises in the example illustrated six reliefs 22i, 24i each.
• the six reliefs 22i, 24i of each ring 22, 24 are here associated in pairs of neighboring reliefs 22i, 24i, the three neighboring pairs of reliefs 22i, 24i being regularly distributed angularly around the axis A of rotation of the fan wheel 12.
• the reliefs 22i, 24i are here covered by the material forming the elastic ring 30.
• the assembly formed by the inner 20 and outer 22 rings, and the decoupling element 26 is received in a cavity of the deflector 20.
• the inner ring 22 is made integral with the stator (here not visible) of the motor 14.
• the outer ring 24 is here fixed to the deflector 20.
• a layer of elastomeric material can be interposed between the outer ring 24 and the deflector 20.
• the inner ring 22 has a plurality of fingers 34.
• the fingers 34 extend radially outwardly, from the outer surface of the inner ring 22.
• each finger 34 has an "H" section, comprising two arms 34i, 342 substantially planar, connected to each other by a core 343.
• the arms 34i, 342 are here perpendicular to the direction of the axis A of rotation of the fan wheel 12.
• the thickness of each arm 34i, 342 and of the core 343 can be between 1 mm and 3 mm.
• the thickness of each arm 34i, 342 and of the core 343 may in particular be equal to 2 mm.
• the inner ring 22 has three fingers 34.
• the fingers 34 are preferably regularly distributed angularly around the axis A of rotation of the fan wheel 12.
• each finger 34 can be s' extend in a radial direction R relative to the axis A of rotation of the fan wheel 12 such that the plane formed by this radial direction R and comprising the axis A of rotation of the fan wheel 12 is a plane of symmetry two elastic pads 32 of a pair of neighboring elastic pads 32.
• two neighboring first pads 32 are arranged angularly, symmetrically on either side of an associated finger 34.
• the outer ring 24 for its part comprises a plurality of housings 36. Each housing 36 is adapted to receive a respective finger 34.
• the housings 36 thus open out at least on the radially inner surface of the outer ring 24.
• the housings 36 are through, opening on the radially inner surface of the outer ring 24 and on the radially outer surface of the ring. exterior 24.
• the housings 36 are preferably regularly distributed angularly around the axis A of rotation of the fan wheel 12.
• tilting is meant here any movement of one of the rings 22, 24 relative to the other 22, 24, outside the common median plane P of the rings 22, 24, normal to the direction of the axis A of rotation of the fan wheel 12.
• the housings 36 have dimensions such that a clearance exists between the walls of each housing 36 and the finger 34 which is received therein.
• play exists in the orthoradial direction, allowing a priori a relative rotation of the inner ring 22 relative to the outer ring 24, around the axis A of rotation of the fan wheel 12.
• each housing 36 can be covered with elastomeric material.
• the elastomer layer 37 which covers the walls of each housing 28, in particular the side walls 36i, is integral with the elastic ring 30.
• the motor support 18 also comprises a second decoupling means 38, to limit a relative movement of the two rings 22, 24 in the direction of the axis A of rotation of the fan 12.
• this second decoupling means 38 comprises a plurality of second elastic pads 40, arranged axially between the inner ring 22 and the outer ring 24.
• each second elastic pad 40 extends at least partially, preferably totally, between a part of the inner ring 22 and a part of the outer ring 24, in the direction of the axis A of rotation of the fan wheel 12.
• the second pads 40 are each disposed between a finger 34 and a wall 362, 363 of the housing 36 in which the finger 34 is received.
• each second pad 40 is disposed between a flat surface of an arm 34i, 342 of a respective finger 34, and a wall 362, 363 of the housing 36, normal to the axis A of rotation of the fan wheel 12
• each finger 34 extends at least in part between a flat surface of an arm 34i, 342 of a finger 34 and a wall 362, 363 of the housing 36, normal to the axis A of rotation of the wheel. fan 12, in the direction of the axis A of rotation of the fan wheel 12.
• two second pads 40 are associated with each finger 34.
• two second pads 40 can be arranged on either side of the same finger 34, in the direction of the axis A of rotation of the wheel. fan 12.
• each finger 34 may be between two second pads 40.
• the two second pads 40 associated with the same finger 34 can be identical to ensure a behavior of the motor support 18 substantially symmetrical, regardless of the direction of movement of one ring relative to the other, in the direction of the axis A of rotation of the fan wheel 12.
• each second pad 40 is in contact with, or even compressed between, a flat surface of an arm 34i, 342 of the finger 34 and a surface 362, 363 of the housing 36 normal to the axis A rotation of the fan wheel 12. This limits the possible movement of the finger 34 in the housing 36, in the direction of the axis A of rotation of the fan wheel 12.
• each second pad 40 may have a compression ratio, axial, greater than or equal to 5% and / or less than or equal to 25%, preferably substantially equal to 15%.
• the axial compression ratio as the ratio between:
• the thickness of the second stud 40 measured in the direction of the axis A of rotation of the fan wheel 12, before the installation between the finger 34 and the wall 362, 363 of the housing 36, normal to the direction of the axis A of rotation of the fan wheel 12, on the one hand, and the thickness of the second stud 40, measured in the direction of the axis A of rotation of the fan wheel 12, after the positioning between the finger 34 and the wall 362, 363 of the housing 36, normal to the direction of the axis A of rotation of the fan wheel 12; and - the thickness of the second stud 40, measured in the direction of the axis A of rotation of the fan wheel 12, before fitting between the finger 34 and the wall 362, 363 of the housing 36, normal to the direction of the axis A of rotation of the fan wheel 12.
• the second pads 40 can be made of an elastomeric material.
• the elastomeric material forming the second pads 40 can be chosen as a function of its hardness. This elastomeric material may in particular have a hardness greater than or equal to 25 shore and / or less than or equal to 50 shore.
• the second studs 40 can be molded onto the fingers 34 of the inner ring 22 and / or on the walls 362, 363 of the housings 36 of the outer ring 24. In one embodiment appearing to be particularly advantageous, the second studs 40 are integral with the elastic ring 30 and the first pads 32, if applicable. This makes it easier to mount the motor support 18.
• Figures 4 and 5 illustrate two examples of possible shapes of the second pads 40.
• each second pad 40 has a generally cylindrical shape, in that each second pad 40 has a constant cross section, each second pad 40 extending in a radial direction R with respect to the axis A of rotation of the fan wheel 12.
• each second pad 40 is here in the shape of an "H", such that each arm 40B of the "H” either in contact with a flat surface of an arm 34i, 342 of a finger 34, or with a wall 362, 363 of the housing 36, normal to the axis A of rotation of the fan wheel 12.
• each arm 40B of a second pad 40 is in contact with one of the two inner or outer rings 22. 24, respectively.
• a core 40A connects the two arms 40B of the section of each second pad 40.
• the core 40A here has a minimum thickness substantially equidistant from the two arms 40B, in the direction of the axis of rotation A of the wheel fan 12.
• the core 40A has a flared shape from its part corresponding to its minimum thickness towards each of the two arms 40B.
• the core 40A thus allows a certain flexibility of the second pad 40, which can thus be deformed. It is noted here that the lateral ends 34L of the arms 34i, 342 of a finger 34 are also covered by the associated second pad 40. The second pad 40 is thus kept in position on the associated finger 34.
• each second pad 40 still has a generally cylindrical shape, in that each second pad 40 has a constant cross section, each second pad extending in a radial direction R with respect to the axis A of rotation of the fan wheel 12.
• each second pad 40 has substantially the shape of two half-cylinders 42 joined by their cylindrical surfaces 42S. Like the second pad 40, each half-cylinder 42 extends parallel to the radial direction R. The two half-cylinders 42 thus extend in particular along parallel axes. Here, the axes along which the two half-cylinders 42 extend are perpendicular to the axis A of rotation of the fan wheel 12.
• the second pad 40 thus also has, in cross section, a minimum thickness substantially equidistant from the finger 34 and from the wall 362, 363 of the housing 36.
• this minimum thickness in section of the second pad 40 allows a certain flexibility of the stud 40, which can thus be deformed.
• the lateral ends 34L of the branches of the finger 34 are also covered by the second stud 40.
• the second stud 40 is thus kept in position on the finger. 34 partner.
• the first decoupling means and the second decoupling means are independent.
• the first and second decoupling means can be formed by separate parts.
• the embodiment described above, in which the two decoupling means form one and the same part appears advantageous in particular in that it facilitates the assembly of the motor support.
• the realization of the decoupling means in several parts allows the use of materials different for each of these decoupling means. This can in particular make it possible to choose a material better suited to each of these decoupling functions.
• the shape of the first and / or second studs may differ from the shapes described above, by way of example only.
• the shape of the first and / or second studs can in particular be chosen so as to ensure satisfactory mechanical strength of these studs, while allowing a certain decoupling between the inner 22 and outer 24 rings.
• the inner ring forms fingers received in housings formed in the outer ring.
• the reverse configuration can however be envisaged, according to which the outer ring has fingers oriented radially towards the inner ring and received in housings formed in this inner ring.
• the radial stops can also take other forms than that described here.
• the radial stops can in particular be formed by pins attached to the inner ring 22 and / or to the outer ring 24.
• each radial stop is fixed to one of the two inner 22 and outer 24 rings and extends between these two inner 22 and outer 24 rings, with radial play.
• Orthoradial stops can be provided, to limit the relative rotation of the inner ring 22 relative to the outer ring 24, around the axis of rotation A of the fan wheel 12. These orthoradial stops can in particular be provided in the housings 36 and cooperate with the finger 34 which is received there. These orthoradial stops can also be formed by pins attached to the ring forming the housings 36.
• three pairs of radial stops are regularly distributed on the inner ring and on the outer ring, around the common axis of the two inner and outer rings.
• the engine support may in particular include two radial stops opposite relative to the center of the inner rings 22 and outer 24, or three or more radial stops, preferably regularly distributed around the common axis of the inner and outer rings.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Power Engineering (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Aviation & Aerospace Engineering (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Air-Conditioning For Vehicles (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72178816

Family Applications (1)

Country Status (5)

Family Cites Families (4)

• 2020
  • 2020-06-10 FR FR2006088A patent/FR3111409B1/fr active Active
• 2021
  • 2021-06-03 WO PCT/EP2021/064911 patent/WO2021249862A1/fr unknown
  • 2021-06-03 US US18/009,489 patent/US20230287901A1/en active Pending
  • 2021-06-03 CN CN202180036449.1A patent/CN115715451A/zh active Pending
  • 2021-06-03 EP EP21731107.5A patent/EP4165755A1/de not_active Withdrawn

Also Published As

Similar Documents

Legal Events