EP4118342A1 - Bras de maintien pour armature de support - Google Patents
Bras de maintien pour armature de supportInfo
- Publication number
- EP4118342A1 EP4118342A1 EP21714247.0A EP21714247A EP4118342A1 EP 4118342 A1 EP4118342 A1 EP 4118342A1 EP 21714247 A EP21714247 A EP 21714247A EP 4118342 A1 EP4118342 A1 EP 4118342A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- support
- support arms
- plane
- arms
- 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
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/06—Guiding or ducting air to, or from, ducted fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- 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
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- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
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- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
Definitions
- Support arm for support frame
- the present invention relates to the automotive field, and more particularly that of air circulation for cooling an engine.
- motor vehicles evacuate the calories generated by their operation and are therefore equipped with heat exchangers, in particular cooling radiators, placed for example at the front of the vehicle and traversed for example from outside air.
- heat exchangers in particular cooling radiators, placed for example at the front of the vehicle and traversed for example from outside air.
- a fan is placed upstream or downstream.
- a propeller can be used to force air circulation.
- the propeller generates a relatively high flow rate and a relatively low pressure and exhibits flow oriented axially, that is, in the direction of an axis of rotation of the propeller.
- This presentation describes a support frame for a ventilation device for cooling a fluid flowing through a cooling circuit of a motor vehicle, said frame comprising an opening defining an opening perimeter, the opening being intended to receive a propeller, and a central support positioned in the center of said opening and shaped to receive a motor actuating said propeller so as to generate a ventilation flow, said central support being attached, through said opening, to the frame by at least six support arms, at least three first support arms being placed in a first plane or cone of revolution (or cone in this presentation), and at least three second holding arms being placed in a second plane or cone of revolution different from the first plane or cone of revolution, the first holding arms being each separated from everything second support arm at the level of the opening perimeter by a space covering at least a distance corresponding to a cord of said first support arms.
- a structure as described allows the reinforcement to be reinforced by distributing the support network formed by the support arms, while allowing the flow to flow between the support arms.
- This reinforcement of the frame can make it possible to reduce the constraints linked to the shape of said support arms, or else to avoid a so-called pumping phenomenon corresponding to a periodic, unwanted movement of the central support in the direction of the axis. propeller rotation caused by oscillation of the support arms.
- the first support arms are placed in a first plane and the second support arms are placed in a second plane parallel to the first plane.
- This distribution of the support arms in different planes makes it possible to stiffen the support structure of the central support, any oscillation of the support arms placed in the first plane being compensated for or avoided by the support arms placed in the second plane.
- Such a structure in fact improves the axial rigidity of the frame in the space of rotation of the propeller.
- the first support arms are placed in a first cone of revolution and the second support arms are placed in a second cone of revolution different from the first cone of revolution.
- Such a structure allows, by the use of different angles between the first and the second holding arms on the one hand, and the axis of rotation of the propeller on the other hand, a mechanical compensation limiting the effect of pumping mentioned above, any movement of the first arms being at least partly compensated by a voltage generated by the second arms, and vice versa.
- the first support arms form a first angle with a plane defined by the opening, the second support arms forming a second angle with the plane defined by the opening, the first and the second angle being of the same sign.
- the first support arms form a first angle with a plane defined by the opening
- the second support arms forming a second angle with the plane defined by the opening, the first and the second angle being of signs. opposites.
- This arrangement can allow an interlacing between the first and the second support arms allowing an improvement of torque transfer between the central support and the opening perimeter.
- each first support arm is separated from another first support arm by at least one second support arm. Such a distribution improves the rigidity of the assembly, a tension on the first support arms being compensated by a second support arm placed between them.
- the first support arms form groups of first support arms following one another along the opening perimeter, each group of first support arms being separated from another group of first support arms at the less by a second support arm or by a group of second support arms.
- a distribution allows partial interlacing between the first and second retaining arms, such partial interlacing making it possible to simplify the structure while benefiting from a distribution between the first and second retaining arms along the opening perimeter.
- the first and second holding arms are regularly distributed along the opening perimeter. This facilitates a balancing of the structure which will participate in reducing or avoiding the pumping phenomenon.
- the opening has the shape of a ring, the ring comprising three complementary sectors, each complementary sector covering 120 degrees of the ring, each complementary sector comprising the same number of first and second arms of maintenance.
- the support arms have an aerodynamic shape. Such a shape allows the holding arms not only to fulfill a role of supporting the central support, but also to aid in the generation of the cooling flow by cooperating with an aerodynamic shape of the propeller blades.
- the support arms have a doubly twisted aerodynamic shape.
- Such a shape has a particularly positive effect on the generation of the desired cooling flow.
- the mechanical flexibility introduced by the use of such a shape is compensated for by the rigidity of an arrangement of the support arms as in this description.
- each holding arm is linked to the frame by a corresponding stud, said studs extending perpendicularly to the opening, some of said studs linked to the first holding arms having a first height perpendicular to the opening and from a plane comprising the opening, some other of said studs linked to the second holding arms having a second height perpendicular to the opening and from the plane comprising the opening, the first height being different from the second height.
- Such an arrangement of studs allows the placement of the first and second arms at different heights at a location of connection with the frame in order to obtain a structure as described, while allowing passage of the flow between the studs.
- This disclosure also describes a ventilation device comprising a propeller whose motor is carried by the support frame according to the present description.
- a ventilation device comprising a propeller whose motor is carried by the support frame according to the present description.
- Such a device may for example allow a synergy between the shape of the propeller and the shape and position of the holding arm as described.
- This presentation also describes a cooling module for the heat engine of a motor vehicle comprising the ventilation device as described, the cooling module being able to implement an aerodynamic synergy between its various components, in particular the arms of maintenance as described.
- FIG. 1 A is an exemplary representation of a support frame according to this disclosure.
- FIG. 1 B is an example representation of a cross section of a support frame as shown in Figure 1 A.
- Fig. 1 C is an example representation of a cross section of a support frame as shown in Figure 1 A.
- FIG. 1C is an exemplary cross-sectional representation of a support frame as shown in Figure 1A.
- FIG. 1 D is an exemplary cross-sectional representation of a support frame as shown in Figure 1 A.
- FIG. 1 E is an exemplary cross-sectional representation of a support frame as shown in Figure 1 A.
- FIG. 1F is an example representation of a support frame according to this disclosure.
- FIG. 2A is an exemplary representation of a support frame according to this disclosure.
- FIG. 2B is a representation of part of the frame shown in Figure 2A.
- FIG. 3 is a representation of an example of a ventilation device according to the present disclosure.
- FIG. 4 is a representation of an example of a cooling module according to this disclosure.
- This disclosure relates to a support frame for a ventilation device for cooling a fluid flowing through a cooling circuit of a motor vehicle.
- This reinforcement can in certain cases be integrated into a motor-fan unit or GMV.
- the motor vehicle may be thermal or electric propulsion, or hybrid propulsion.
- This frame may correspond to a base comprising a nozzle.
- This frame may have a generally parallelepipedal shape, for example having outer dimensions of between 1 and 8 cm thick in the axial direction of rotation of the propeller, and dimensions of between 20 and 60 cm on the side in a plane normal to said axial direction.
- This frame may have a generally parallelepipedal shape, for example having outer dimensions of between 2 and 6 cm thick in the axial direction of rotation of the propeller, and dimensions of between 45 and 55 cm on the side in a plane normal to said axial direction.
- the frame according to this description comprises an opening defining an opening perimeter, the opening being intended to receive a propeller.
- Such an opening may have a generally circular opening perimeter having a diameter, for example between 30 and 50 cm.
- Such an opening may have a generally circular opening perimeter having a diameter, for example between 35 and 45 cm.
- Such an opening may have a generally circular opening perimeter having a diameter for example between 38 and 42 cm.
- This opening allows the circulation of a flow such as a flow of air generated by the rotation of the propeller.
- the shape of the opening corresponds to the shape of the propeller, the opening opening in a plane normal to the axis of rotation of the propeller.
- the opening has a generally ring-shaped shape having an opening perimeter corresponding to the outer perimeter of the ring.
- the opening perimeter determines the wall of a hollow cylindrical cavity in which the propeller is positioned, the cylindrical cavity having an axis corresponding to the axial direction or axis of rotation of the propeller.
- the frame can ensure attachment to a support, for example a cooling radiator or a vehicle frame, as well as the support of an electric motor for actuating the propeller and maintaining the axis around which the propeller - here turns.
- the frame can form a wall and limit or prevent recirculation between the upstream and downstream of the propeller.
- the attachment of an electric motor to the frame can be constituted by several holding arms having a mechanical holding function. Such support arms can take the form of an airplane wing, or of a stator blade, giving them an aerodynamic function beyond their mechanical function.
- the stator vanes allow for example a rectification of the flow.
- the frame according to this disclosure comprises a central support positioned in the center of said opening.
- the center of the opening can correspond to the center of a circle corresponding to a perimeter of the opening.
- the center of the opening may include where the axis of rotation of the propeller intersects with a plane including the opening.
- This central support is shaped to receive a motor actuating said propeller so as to generate a flow or flow of ventilation.
- the armature according to this disclosure not only defines a nozzle through which flows the flow generated by the propeller but also allows anchoring of a motor such as an electric motor operating the propeller.
- Said central support is attached, through said opening, to the frame by at least six retaining arms.
- Such holding arms have a mechanical function making it possible to attach the central support to the periphery of the frame through the opening. In order to ensure a certain rigidity of the assembly, the number of support arms must be sufficient.
- Each support arm forms a bridge between the central support and the peripheral part of the frame defining the opening.
- Each arm holding has two ends, one end being linked to the central support, the other end being linked, optionally by means of a stud, to the perimeter of the opening. Between the two ends, the support arms extend radially from the axis of rotation of the propeller.
- said central support is attached, through said opening, to the frame by at least eight support arms.
- said central support is attached, through said opening, to the frame by at least ten support arms. In some cases, said central support is attached, through said opening, to the frame by at least twelve support arms.
- the use of a higher number of support arms can contribute to better mechanical balancing of the assembly, and can provide increased freedom to use particularly aerodynamic shapes for said support arms.
- Such holding arms have a mechanical role of supporting a central support. Due to the fact that such support arms pass through the opening and are therefore in the flow generated by the propeller, the support arms have an influence on the aerodynamics of the assembly. It is therefore in certain cases desirable to adapt, for example, the shape of the support arms to the aerodynamics of the assembly. This can have consequences on the mechanical characteristics of the support arms. A compromise must therefore in certain cases be obtained in order on the one hand to obtain appropriate mechanical characteristics for the support arms, and on the other hand to use a particularly aerodynamic shape for the latter.
- the support frame according to the present disclosure makes it possible to resolve this compromise by improving the rigidity of the structure by a differentiated positioning of the support arms as described.
- Such a differentiated positioning makes it possible in particular to limit a so-called “pumping” phenomenon consisting, under certain conditions, of an unwanted periodic movement of the central support in the direction of the axis of rotation of the propeller, due to excessive flexibility of the arms. maintenance.
- the differentiated positioning of the support arms as described in this description makes it possible to reduce the occurrence of such “pumping”.
- Such a differentiated positioning makes it possible to improve the rigidity of the assembly and therefore to provide increased freedom as to the choice of the shape of the holding arms, for example by allowing the use of support arms lightened or having a particularly fine and aerodynamic shape.
- At least three first support arms are placed in a first plane or cone of revolution, and at least three second support arms are placed in a second plane or cone of revolution different from the first plane or cone of revolution. revolution.
- This differentiated placement of the support arms makes it possible to improve the rigidity of the structure, limiting the aforementioned pumping phenomenon. It is possible that this improvement in rigidity is obtained by the fact that a natural frequency of vibration of the first support arms is different from a natural frequency of vibration of the second support arms, leading to a synergistic stabilization of the assembly. and therefore to a limitation or even elimination of the unwanted pumping phenomenon.
- first plane or cone of revolution for the first three support arms makes it possible to obtain a certain homogeneity of placement of the first three support arms contributing to the mechanical stability of the assembly, as well as to its ease of manufacture.
- second plane or cone of revolution for the three second support arms makes it possible to obtain a certain homogeneity of placement of the first three support arms contributing to the mechanical stability of the assembly, as well as 'to its ease of manufacture.
- the first cone of revolution has as its axis the axis of rotation of the helix corresponding to the center of the opening perimeter.
- the second cone of revolution has as its axis the axis of rotation of the helix corresponding to the center of the opening perimeter.
- the foreground is parallel to a plane including the perimeter of the opening.
- the second plane is parallel to a plane including the perimeter of the opening.
- the number of the first support arms is equal to the number of the second support arms. In some cases, the number of the first support arms is greater than the number of the second support arms. In some cases, the number of the first support arms is less than double the number of the second support arms. In some cases, the number of first support arms is less than three times the number of second support arms.
- the first holding arms are each separated from any second holding arm at the level of the opening perimeter by a space covering at least a distance corresponding to a cord of said first holding arms.
- Arranging such a space between the first retaining arms and each second retaining arm makes it possible, on the one hand, to obtain satisfactory mechanical behavior of each type of retaining arm, avoiding an extreme proximity of a first and a second support arm leads to behavior similar to a single split support arm, which would not achieve the structural rigidity behavior sought in this disclosure.
- a chord of said first support arms corresponds for example to a thickness of a first support arm in a direction tangent to the opening perimeter, corresponding to an angular direction of movement of the rotating propeller.
- This chord can be measured at different points along the support arm, at a different distance from the axis of rotation of the propeller.
- the distance corresponding to this string can therefore vary for a first specific support arm.
- the string considered is the average string of the different strings of the first holding arm considered.
- the string considered is the middle string of the different strings of the first holding arm considered.
- the string considered is the maximum string of the different strings of the first holding arm considered.
- the string considered is the minimum string of the different strings of the first holding arm considered.
- the rope considered is the rope of the first holding arm considered at the location of its attachment to the perimeter of the opening, opposite to the central support.
- the rope considered is the rope of the first holding arm considered at the place of its attachment to the central support.
- the distance corresponding to the cord considered is related to the opening perimeter in order to determine the distance which must separate the first support arm from any second support arm. It is understood that the same first support arm will be located closer to any second support arm at the level of the central support, due to the structure of the assembly. This spacing, beyond mechanical consequences, allows a flow of the flow between the holding arms considered.
- the first support arms are each separated from any second support arm at the level of the opening perimeter by a space covering at least twice a distance corresponding to a cord of said first support arms.
- the first support arms are each separated from any second support arm at the level of the opening perimeter by a space covering at least three times a distance corresponding to three times one to a chord of said first support arms. maintenance. In certain cases, the first support arms are each separated from any second support arm at the level of the opening perimeter by a space covering at least four times a distance corresponding to three times one to one string of said first support arms. maintenance.
- Figure 1A shows a frame according to the present disclosure shows a support frame 100 of a ventilation device for cooling a fluid flowing through a cooling circuit of a motor vehicle, said frame 100 comprising an opening defining a circular opening perimeter 103, the opening being intended to receive a propeller, not shown, and a cylindrical central support 102 positioned at the center of said opening and shaped to receive a motor, not shown, actuating said propeller so as to generate a ventilation flow, said central support 102 being attached, through said opening, to the frame by six support arms 111 -116, at least three first support arms 111, 113, 115 being placed in a first plane or cone of revolution, and at least three second retaining arms 112, 114, 116 being placed in a second plane or cone of revolution different from the first plane or cone of revolution, the first support arms each being separated from any second support arm at the opening perimeter by a space 131 covering at least a distance corresponding to a chord of said first support arms.
- the frame comprises first arms 111, 113 and 115 alternated with the second arms 112, 114 and 116.
- each first support arm is separated from a another first support arm by a second support arm.
- Such a configuration is mechanically particularly balanced.
- each first support arm is separated from another first support arm by at least one second support arm.
- the frame may include additional support arms that are neither the first nor the second support arms, such additional support arms having their own configuration and placement.
- the frame shown in Figure 1A can have a number of different configurations.
- Figure 1B shows a possible section of the frame according to section S of Figure 1A in a plane perpendicular to the view of Figure 1A comprising the first holding arm 115 and the second holding arm 112
- the first support arms such as the first support arm 115 are placed in a first plane 141.
- the second support arms such as the second support arm 112 are placed in a second plane 142.
- the "placement" of a support arm "in” a plane or a cone of revolution involves the placement of a general axis of such a support arm in such an arm or cone, and not of the arm itself, a plane or a cone having in theory a zero thickness.
- Such a general axis of the arm can correspond to a theoretical straight segment joining the end of the corresponding arm in contact with the central support and the opposite end of the same arm in contact with the perimeter of the opening.
- the first plane and the second plane are planes normal to the axis 101 of rotation of the helix or central axis of the frame or central axis of the central support.
- the distance separating the first and the second plane can be in some cases at least the thickness of a first support arm measured at the junction of such first support arm with the opening perimeter in the direction of propeller rotation.
- the distance separating the first and the second plane can be in some cases at least twice the thickness of a first support arm measured at the junction of such first support arm with the opening perimeter in the direction of rotation of the propeller.
- the distance separating the first and the second plane can be in some cases at least three times the thickness of a first support arm measured at the junction of such first support arm with the opening perimeter in the direction of rotation of the propeller.
- An increased difference between said planes can contribute to mechanical stability. Excessive distance can make the bulk of the reinforcement excessive.
- the distance separating the first and the second plane can be in some cases at most four times the thickness of a first support arm measured at the junction of such first support arm with the opening perimeter in the direction of rotation of the propeller.
- the distance separating the first and the second plane can be in some cases at most three times the thickness of a first support arm measured at the junction of such first support arm with the opening perimeter in the direction of rotation of the propeller.
- Figure 1 C shows a possible section of the frame according to section S of Figure 1 A in a plane perpendicular to the view of Figure 1 A comprising the first holding arm 115 and the second holding arm 112
- the first support arms such as the first support arm 115 are placed in a first cone partially represented by the generator 151 of the first cone, the axis of the cone being the axis 101 of rotation of the first cone. 'Helix.
- the second support arms such as the second support arm 112 are placed in a second cone partially represented by the generator 152 of the second cone, the axis of the cone being the axis 101 of rotation of the Helix.
- the first cone of revolution is different from the second cone in order to achieve the effect sought in this talk.
- the first cone and the second cone are cones having the same axis 101 of rotation of the propeller or central axis of the frame or central axis of the central support.
- the first support arms forming a first angle 161 with a plane 104 defined by the opening
- the second support arms forming a second angle 162 with the plane 104 defined by the opening, the first and the second angle being of the same opposite sign.
- the first angle and the second angle differ by at least 5 degrees. In some cases, the first angle and the second angle differ by at least 10 degrees. In some cases, the first angle and the second angle differ by at least 15 degrees. In some cases, the first angle and the second angle differ by at least 20 degrees. In some cases, the first angle and the second angle differ by at least 30 degrees. In some cases, the first angle and the second angle differ by at least 45 degrees. In some cases, the first angle and the second angle differ by less than 90 degrees. In some cases, the first angle and the second angle differ by less than 60 degrees.
- An increased difference between said first and second angle can contribute to mechanical stability. An excessive difference can make the bulk of the reinforcement excessive.
- the first or second angle can be between -5 and +5 degrees.
- the first or second angle can be between -15 and +15 degrees.
- the first or second angle can be between -20 and +20 degrees.
- the first or second angle can be between -30 and +30 degrees.
- Figure 1 D shows a possible section of the frame according to section S of Figure 1 A in a plane perpendicular to the view of Figure 1 A comprising the first holding arm 115 and the second holding arm 112
- the first support arms such as the first support arm 115 are placed in a first cone partially represented by the generator 153 of the first cone, the axis of the cone being the axis 101 of rotation of the first cone. 'Helix.
- the second support arms such as the second support arm 112 are placed in a second cone partially represented by the generator 154 of the second cone, the axis of the cone being the axis 101 of rotation of the Helix.
- the first cone of revolution is different from the second cone in order to achieve the effect sought in this talk.
- the first cone and the second cone are cones having the same axis 101 of rotation of the propeller or central axis of the frame or central axis of the central support.
- the first support arms forming a first angle 163 with a plane 104 defined by the opening
- the second support arms forming a second angle 164 with the plane 104 defined by the opening, the first and the second angle being of opposite signs.
- Figure 1 E shows a possible section of the frame according to section S of Figure 1 A in a plane perpendicular to the view of Figure 1 A comprising the first holding arm 115 and the second holding arm 112
- the first support arms such as the first support arm 115 are placed in a cone partially represented by the generatrix 155 of the first cone, the axis of the cone being the axis 101 of rotation of the cone. Helix.
- the second support arms such as the second support arm 112 are placed in a plane 144 parallel to the plane including the opening.
- Figure 1F shows an example of a frame 105 similar to the example shown in Figure 1A, the frame 105 comprising six first retaining arms 117 and six second retaining arms 118, the first retaining arms 117 forming groups of two first support arms following one another along the opening perimeter, each group of first arms of two support arms 117 being separated from another group of two first support arms 117 at least by a group of second support arms 118.
- the first support arms form groups of first support arms succeeding each other along the opening perimeter, each group of first support arms being separated from another group of first support arms at least by a second support arm or by a group of second support arms. This makes it possible to increase the number of support arms while maintaining a homogeneous structure.
- the opening has a ring shape, the ring comprising three complementary sectors, each complementary sector covering 120 degrees of the ring, each complementary sector comprising the same number of first and second retaining arms.
- the ring forming the opening is defined by the circumference of the central support 102 and by the opening perimeter 103.
- three complementary sectors of 120 degrees of this ring are limited by the axes 160.
- Each of these three sectors shown comprises four support arms, the same number of first support arms and second support arms, precisely in this case two support arms 117 and two support arms 118 per sector. This provides a balanced structure, avoiding or reducing vibrations during a rotating propeller movement.
- the ring comprises six complementary sectors, each complementary sector covering 60 degrees of the ring, each complementary sector comprising the same number of first and second support arms.
- the support arms have an aerodynamic shape, such as the twelve support arm 210-221 between the opening perimeter 203 and the central support 202 of the frame 200. This can make it possible to improve the flow obtained by the use of the frame by adding to the support arms an aerodynamic role beyond their role as mechanical supports.
- the support arms 210-221 include six first support arms 211, 213, 215, 217, 219, and 221 and six second support arms 210, 212, 214, 216, 218 and 220. In this case, the first and second support arms are alternated.
- the first support arms are attached to a first level N1 of the central support, the second support arms being attached to a second level N2 of the central support, the level N1 being different from the level N2 along an axis 201 of propeller rotation, said axis 201 being normal to a plane comprising the opening.
- the first support arms are attached to a third level N3 of the central support, the second support arms being attached to a fourth level N4 of the central support, the different level N3. from level N4 along axis 201 of propeller rotation.
- each holding arm is linked to the frame by a corresponding stud, said studs extending perpendicularly to the opening, some of said studs linked to the first holding arms having a first height perpendicular to the opening and from a plane comprising the opening, some other of said studs linked to the second holding arms having a second height perpendicular to the opening and from the plane comprising the opening, the first height being different from the second height.
- the use of such pads can facilitate the generation of a flow in the radial direction passing between consecutive pads.
- each holding arm 210-221 is linked to the frame 200 by a corresponding stud, said studs extending perpendicular to the opening, some of said studs linked to the first support arms having a first height, corresponding to the level N3, perpendicular to the opening and from a plane comprising the opening, certain other of said studs linked to the second holding arms having a second height, corresponding to the level N4, perpendicular to the opening and from the plane comprising the opening, the first height being different from the second height.
- An aerodynamic shape may include a leading edge and a trailing edge, a flow being incident with the leading edge, the flow following a lower surface and an upper surface. The lower surface and upper surface meet at the trailing edge beyond which the tide flows.
- An aerodynamic shape includes a chord line and a camber line, the chord line following a straight line joining the leading edge and the trailing edge, the camber line being a curve joining the leading edge and the trailing edge. leakage, the camber line being a curve halfway between the intrados and the extrados. A leading edge continues to a point of maximum thickness.
- the support arms have a particularly aerodynamic double twisted shape.
- the holding arms 210-221 have for example a doubly twisted shape which aims to reduce a drag due to the friction of the air against said holding arms during the operation of a propeller.
- Such arms can take, beyond their mechanical function, a dual aerodynamic and acoustic function.
- aerodynamically shaped holding arms are in some cases constituted by thin blades, of large wingspan and of elongated section, with a rope the length of which is at least 1.5 times greater than that of their thickness, in particular at their point of greatest thickness.
- These support arms have an aerodynamic profile to reduce their drag, and a profile setting changes throughout their span, between their foot carried by the central support 202 and their head connected to the opening perimeter 203.
- the profile setting of section of said support arm can for example evolve along their span, starting from a substantially radial orientation at the level of its foot and of the central support 202, to come to a much more axial orientation at mid-span of the support arm, and to return to a substantially radial orientation at the level of its head and of the opening perimeter 203.
- the law of wedging is- i.e.
- the angle that the chord of this section makes with the axial direction of rotation of the propeller, normal to the plane defined by the opening, is scalable along the span to adapt to the direction and the gyration of the flow at the outlet of the propeller. This is beneficial both for aerodynamic efficiency and for the reduction of instabilities which generate noise.
- the root setting, as well as the head setting has a significant value (for example greater than 70 °), while the central part of the blade, that is to say that included in 25 and 75% of the wingspan , takes to have a relatively weak setting (for example less than 20 °).
- the retaining arms 210-221 have, for example, a double twisted shape along a line connecting the mid-chord points of the retaining arm, the twisting being constituted by a rotation of the section of the stator, in a tangential plane. , when describing this line from the foot to the head of the support arm. It is said to be double twisted because the twist increases from the foot towards the mid-span, to decrease from the mid-span towards the head and return to a low twist level. According to an embodiment not shown, the evolution of the setting could be interrupted, or follow another law, in the central part of the stator. Such a doubly twisted shape reduces the rigidity of the arms which therefore particularly benefit from the various configurations as described in the present disclosure.
- first support arms join with the central support at a first level of a propeller axis of rotation and the second support arms join with the central support at a second level of an axis of rotation.
- propeller rotation, the first level and the second level being separated by at least 50% of the maximum thickness of a first support arm, the thickness being measured along the span of the support arm (or stator ), without taking into account its ends.
- the first support arms join the opening perimeter at a first level of a propeller axis of rotation and the second support arms join the central support at a second level of a propeller axis of rotation, the first level and the second level being separated by at least 50% of the maximum thickness of a first support arm, the thickness being measured at along the span of the support arm (or stator), without taking its ends into account.
- first support arms join with the central support at a first level of a propeller axis of rotation and the second support arms join with the central support at a second level of an axis of rotation.
- first level and the second level being separated by at most three times the maximum length of a chord of a first support arm, the chord being between a leading edge and a corresponding trailing edge of said support arm.
- the first support arms join the opening perimeter at a first level of a propeller axis of rotation and the second support arms join the central support at a second level of a propeller axis of rotation, the first level and the second level being separated by at most three times the maximum length of a rope of a first support arm, the rope being between a leading edge and an edge of corresponding leakage of said holding arm.
- first support arms cross the second support arms.
- Such a configuration is particularly rigid while allowing a limited bulk.
- Figure 3 shows a simplified view of an example of a ventilation device 30 comprising a propeller 310 whose motor 320 is carried a support frame 300 according to this description.
- the propeller 310 has an axis of rotation 301 which may for example correspond to the axis 101 or 201 of the preceding figures.
- the propeller can be placed either between the armature and the motor to be cooled.
- the armature can also be located between the propeller and the engine to be cooled.
- the combination of the aerodynamic function of the propeller with the aerodynamic shape of the studs according to this disclosure results in an improvement in the efficiency of the system as a whole. This performance is further improved by combining the aerodynamic capabilities of the propeller, of the studs as described herein, and of an aerodynamic form of support arm.
- FIG 4 illustrates an example of a cooling module 40 of the heat engine of a motor vehicle comprising a ventilation device according to this disclosure.
- the module includes the elements represented in the Figure 3, as well as a radiator 400 subjected to the flow generated by the propeller 310 and modified by the aerodynamic shape of the pads as described in this presentation.
- the propeller is placed between the radiator 400 and the frame 300, but the frame 300 could also be placed between the propeller and the radiator.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2002499A FR3108147B1 (fr) | 2020-03-13 | 2020-03-13 | Bras de maintien pour armature de support |
| PCT/FR2021/050328 WO2021181024A1 (fr) | 2020-03-13 | 2021-02-25 | Bras de maintien pour armature de support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4118342A1 true EP4118342A1 (fr) | 2023-01-18 |
| EP4118342B1 EP4118342B1 (fr) | 2025-03-26 |
Family
ID=71784160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21714247.0A Active EP4118342B1 (fr) | 2020-03-13 | 2021-02-25 | Armature de support |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12221981B2 (fr) |
| EP (1) | EP4118342B1 (fr) |
| CN (1) | CN115135885B (fr) |
| FR (1) | FR3108147B1 (fr) |
| WO (1) | WO2021181024A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024120856B3 (de) * | 2024-07-23 | 2025-11-13 | Mahle International Gmbh | Tragrahmen für einen Lüfter, Lüfter-Anordnung mit Tragrahmen sowie Wärmeübertrager-Anordnung mit Lüfter-Anordnung |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3883264A (en) * | 1971-04-08 | 1975-05-13 | Gadicherla V R Rao | Quiet fan with non-radial elements |
| US4548548A (en) * | 1984-05-23 | 1985-10-22 | Airflow Research And Manufacturing Corp. | Fan and housing |
| US4805868A (en) * | 1986-07-25 | 1989-02-21 | General Motors Corporation | Isolation bracket assembly for engine cooling fan and motor |
| US5342167A (en) * | 1992-10-09 | 1994-08-30 | Airflow Research And Manufacturing Corporation | Low noise fan |
| JPH10205497A (ja) * | 1996-11-21 | 1998-08-04 | Zexel Corp | 冷却空気導入排出装置 |
| FR2766235B1 (fr) * | 1997-07-17 | 1999-09-24 | Valeo Climatisation | Dispositif de fixation d'un groupe moto-ventilateur sur un element d'un vehicule automobile, notamment un echangeur de chaleur |
| US6206635B1 (en) * | 1998-12-07 | 2001-03-27 | Valeo, Inc. | Fan stator |
| US7811055B2 (en) * | 2004-04-26 | 2010-10-12 | Behr Gmbh & Co. Kg | Fan housing for a heat exchanger, particular for motor vehicles |
| DE102012004617A1 (de) * | 2012-03-06 | 2013-09-12 | Ziehl-Abegg Ag | Axialventilator |
| ITBO20120499A1 (it) * | 2012-09-20 | 2014-03-21 | Spal Automotive Srl | Unita' di ventilazione. |
| FR3008132B1 (fr) * | 2013-07-04 | 2017-07-14 | Valeo Systemes Thermiques | Buse de ventilateur d automobile a bras doublement vrilles |
| FR3015379B1 (fr) * | 2013-12-20 | 2017-06-09 | Valeo Systemes Thermiques | Ventilateur pour automobile comportant un stator en amont de l'helice |
| WO2016199195A1 (fr) * | 2015-06-08 | 2016-12-15 | 三菱電機株式会社 | Ventilateur axial |
-
2020
- 2020-03-13 FR FR2002499A patent/FR3108147B1/fr active Active
-
2021
- 2021-02-25 WO PCT/FR2021/050328 patent/WO2021181024A1/fr not_active Ceased
- 2021-02-25 CN CN202180014864.7A patent/CN115135885B/zh active Active
- 2021-02-25 US US17/911,046 patent/US12221981B2/en active Active
- 2021-02-25 EP EP21714247.0A patent/EP4118342B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115135885A (zh) | 2022-09-30 |
| FR3108147A1 (fr) | 2021-09-17 |
| WO2021181024A1 (fr) | 2021-09-16 |
| US12221981B2 (en) | 2025-02-11 |
| US20230104481A1 (en) | 2023-04-06 |
| FR3108147B1 (fr) | 2022-02-25 |
| CN115135885B (zh) | 2026-01-09 |
| EP4118342B1 (fr) | 2025-03-26 |
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