EP3143681A2 - Ventilateur de machine électrique tournante - Google Patents
Ventilateur de machine électrique tournanteInfo
- Publication number
- EP3143681A2 EP3143681A2 EP15725752.8A EP15725752A EP3143681A2 EP 3143681 A2 EP3143681 A2 EP 3143681A2 EP 15725752 A EP15725752 A EP 15725752A EP 3143681 A2 EP3143681 A2 EP 3143681A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- blades
- blade
- machine according
- electrical machine
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims description 50
- 230000000750 progressive effect Effects 0.000 claims description 34
- 238000009826 distribution Methods 0.000 claims description 32
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000012886 linear function Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or 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
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Definitions
- the present invention is directed to a rotating electric machine fan and a vehicle having such a device.
- the present invention is particularly applicable in the automotive field and more particularly to rotating electrical machines such as motors, alternators and alternator-starters.
- fans for rotating electrical machines are to cool the machine.
- these machines can have rotational speeds of up to about 18,000 rpm and above, significant noise can be generated by the mechanism.
- the present invention aims to remedy all or part of these disadvantages.
- the present invention is directed to a fan of a rotary electric machine comprising at least three blades, of which at least one characteristic of the blades is, following the circumference of the fan in a given direction, progressive for at least three consecutive blades. , the characteristic being selectable from the group comprising:
- a spacing angle between a straight line passing through a characteristic point of a blade and an axis of rotation of the fan, and a straight line passing through a corresponding characteristic point of an adjacent blade. and the axis of rotation of the fan is, following the circumference of the fan in a given direction, progressive for at least three consecutive blades.
- a height of the blade is, following the circumference of the fan in a given direction, progressive for at least three consecutive blades.
- a length of the blade is, following the circumference of the fan in a given direction, progressive for at least three consecutive blades.
- an angle of inclination between a straight line passing through two characteristic points of a blade and a straight line passing through two corresponding characteristic points of an adjacent blade is, following the circumference of the fan in a given direction, progressive for at least three consecutive blades.
- the progressivity of at least one characteristic for at least three blades makes it possible to limit the emergence of harmonics and to reduce the noise of the electric machine. The effect is even more noticeable in slow motion. The comfort of the user is increased.
- At least one characteristic of the blades is progressive for all fan blades.
- the number of blades of the fan object of the present invention is a prime number.
- the sum of the spacing angles between the blades is 360 °.
- the advantage of these embodiments is to have a distribution of the blades achievable and more particularly in the case where the fan comprises two parts comprising blades assembled by welding.
- the smallest distance between two consecutive blades is greater than three millimeters.
- a minimum distance of three millimeters allows adequate air circulation in the machine.
- the minimum arc length between two blades is greater than three millimeters.
- the progressivity of the spacing angles between the blades is defined by a positive function
- a function governing the progressivity of the spacing angles has the advantage of defining a reproducible method of calculating the progressivity of the angles.
- the progressivity function of the spacing angles between the blades is linear.
- the advantage of having a linear function is to have a growth of spacing angles increasing steadily or decreasing spacing angles decreasing steadily.
- the ratio between the largest gap angle between two blades and the smallest gap angle between two blades is greater than 1, 2.
- Such a ratio has the advantage of creating a significant progressivity of the spacing angles between the blades, improving the reduction of noise.
- the progressivity of the blade length is defined by a positive function.
- a function governing the progressivity of the lengths has the advantage of defining a reproducible method of calculating the progressivity of the lengths.
- the progressivity function of the length of the blade is linear.
- the advantage of having a linear function is to have a growth of the lengths increasing in a regular way or a decrease of the lengths decreasing in a regular way.
- the ratio between the length of the largest blade and the length of the smallest blade is greater than 1, 2.
- the progressivity of the blade height is defined by a positive function.
- a function governing the progressivity of the blade heights has the advantage of defining a reproducible method of calculating the progressivity of the heights.
- the progressivity function of the height of the blade is linear.
- the advantage of having a linear function is to have a rise in heights increasing steadily or decreasing heights decreasing steadily.
- the ratio between the height of the largest blade and the height of the smallest blade is greater than 1, 2.
- the progressivity of the inclination angles between the blades is defined by a positive function.
- a function governing the progressivity of the lengths has the advantage of defining a reproducible method of calculating the progressivity of the lengths.
- the progressivity function of the angles of inclination between the blades is linear.
- the advantage of having a linear function is to have a rise in heights increasing steadily or decreasing heights decreasing steadily.
- the ratio between the largest tilt angle and the smallest tilt angle is greater than 1, 2. These embodiments have the advantage of creating a significant progressiveness between the lengths of the different blades and to improve noise reduction. In embodiments, at least two characteristics of the blades are progressive.
- the advantage of these embodiments is to have, for a portion of the blades, a progressivity in height while a progressivity of the angles of inclination is applied to another part of the blades. Better balancing can be achieved.
- the progressivity of at least one blade characteristic is a function of the progressivity of at least one other characteristic of the blade.
- the object of the present invention fan comprises a progressive material distribution configured to balance the fan according to the progressivity of at least one characteristic of at least three blades.
- a progressive distribution of material makes it possible to balance the fan by being inversely proportional to the distribution of material of the blades for example.
- the progressive material distribution is achieved by adding material.
- Such an addition of material has the advantage of allowing a balanced distribution of the material on the fan.
- the deposit is located around an axial hole of the fan.
- the progressive material distribution is achieved by removal of material.
- the advantage presented by these embodiments is the balancing of the fan regardless of the number of blades and their shapes.
- a removal of material compared to a fan without material distribution balancing is less expensive if for example the removal of material was designed as soon as the molding of the piece.
- the material for manufacturing at least one part of the fan mainly comprises aluminum.
- At least one part of the fan is obtained from sheet metal.
- the cost of machining and buying the sheet is low, the cost of the fan and the rotating electrical machine will be reduced.
- at least one part of the fan is obtained by folding.
- the advantage of these embodiments is the speed of folding and thus the decrease in the production cost of large series of fans.
- at least one part of the fan is made of plastic.
- At least one part of the fan is obtained by molding.
- the fan object of the present invention is obtained by assembling two parts comprising blades.
- a two-piece assembly comprising blades has the advantage of having a decrease in noise and ease of manipulation of the parts during the various manufacturing and machining operations.
- the present invention relates to a vehicle which comprises at least one fan object of the present invention.
- FIG. 1 represents, schematically and in plan, a first embodiment of a device that is the subject of the present invention
- FIG. 2 is a schematic representation in plan of a second embodiment of a device that is the subject of the present invention
- invention FIG. 3 represents, schematically and in perspective, an embodiment of a symmetrical fan
- FIG. 4 schematically represents a graph representing a twenty-nine order harmonic generated by an embodiment of a symmetrical fan and an embodiment of a fan that is the subject of the present invention
- FIG. 5 schematically and in plan shows a third embodiment of a device that is the subject of the present invention
- FIG. 6 is a diagrammatic perspective view of a fourth embodiment of a device that is the subject of the present invention.
- FIG. 7 represents, schematically and in perspective, a fifth embodiment of a device that is the subject of the present invention.
- FIG. 8 represents, schematically and in perspective, a sixth embodiment of a device that is the subject of the present invention.
- FIG. 9 represents, schematically and in perspective, a seventh embodiment of a device that is the subject of the present invention.
- Figure 10 shows schematically and in plan, a vehicle object of the present invention.
- Figure 1 shows a front view of a particular embodiment 100 of a fan object of the present invention.
- the device comprises blades 101.
- the number of blades 101 is a prime number.
- the device may comprise blades arranged perpendicularly to one face.
- the face may comprise an axial hole 1 10 receiving a shaft of a rotor of a rotating electrical machine.
- the face is preferably described by an outside diameter.
- the blades 101 are concave. In embodiments, the blades are convex or straight.
- a spacing angle 102 may be defined between:
- end point of the blade which may be the point of the blade, on the face of the fan comprising the blades and on the outer face of the blade, the furthest away from the axis of rotation of the fan and
- a characteristic point 105 on an adjacent blade also characterized as a blade end point and
- the characteristic point may be a point called "blade start point".
- the blade start point 109 is, for example, the point of the blade, on a face of the fan having the blades and on the outer face of the blade, the closest to the axis of rotation of the fan.
- Progressivity between a spacing angle 102 and an adjacent spacing angle 106 may be characterized by a positive function.
- this function is linear and has a strictly positive coefficient of orientation.
- the steering coefficient is strictly greater than 1.
- the progressiveness of the angular distribution of the blades is preferentially applied to all the blades. In embodiments, the progressiveness of the angular distribution is applied to at least three blades.
- the angular distribution of the blades is such that the sum of the spacing angles between corresponding characteristic points is equal to 360 °.
- the ratio between the smallest spacing angle 108 and the larger spacing angle 107 is preferably greater than 1, 2.
- the minimum arc length between two blades is greater than three millimeters.
- the smallest distance between two consecutive blades is greater than three millimeters.
- the arc length can be calculated between two blade tip points of two adjacent blades between which the pitch angle is the smallest pitch angle 108.
- FIG. 2 shows a front view of an embodiment of a fan that is the subject of the present invention.
- the device comprises blades 201.
- the number of blades 201 is a prime number.
- the device may comprise blades arranged perpendicularly to one face.
- the face may comprise an axial hole 210 receiving a shaft of a rotor of a rotating electrical machine.
- the face is preferably described by an outside diameter.
- the spaces between the blades can be empty of material and create teeth on which are the blades.
- the blades 201 are concave. In embodiments, the blades are convex or straight.
- a spacing angle 202 may be defined between:
- end point of blade a characteristic point 203 called "end point of blade” which can be the point of the blade, on the face of the fan comprising the blades and on the outer face of the blade, the furthest away from the axis of rotation of the fan and
- characteristic point 205 on an adjacent blade also characterized as being a blade end point
- the characteristic point may be a point called "blade start point".
- the blade start point 209 is, for example, the point of the blade, on a face of the fan having the blades and on the outer face of the blade, the closest to the axis of rotation of the fan.
- Progressivity between a spacer angle 202 and an adjacent gap angle 206 may be characterized by a positive function.
- this function is linear and of a directing coefficient strictly positive.
- the steering coefficient is strictly greater than 1.
- the progressiveness of the angular distribution of the blades is preferentially applied to all the blades. In embodiments, the progressiveness of the angular distribution is applied to at least three blades.
- the angular distribution of the blades is such that the sum of the spacing angles between corresponding characteristic points is equal to 360 °.
- the ratio between the smallest spacing angle 208 and the larger spacing angle 207 is preferably greater than 1, 2.
- the minimum arc length between two blades is greater than three millimeters and the smallest distance between two consecutive blades is greater than three millimeters.
- the arc length can be calculated between two blade tip points of two adjacent blades between which the pitch angle is the smallest angle 208.
- FIG. 3 shows a front view of a particular embodiment of a fan with a distribution of symmetrical blades.
- the fan 30 has blades 301, the blades 301 can be placed perpendicular to one face and the distribution of the blades can be symmetrical with respect to the angle of spacing.
- the blades are all similar: the same length, the same height and the same angle of inclination.
- the blades 301 may be concave or convex.
- FIG. 4 shows a graph 40 representative of the amplitude of a twenty-nine order harmonic generated by an embodiment of a symmetrical fan 30 and the amplitude of a twenty-second harmonic. -new generated by an embodiment 100 of a fan object of the present invention.
- the graph 40 has for abscissa 401 the rotational speed in revolutions per minute (or RPM acronym for "Rotations Per Minute” in English terminology) of the fan.
- the ordinate 402 is an A-weighted sound power measurement in decibel watt (whose acronym is “dB (A) W") of the amplitude of a signal and more particularly of a sound signal.
- Curve 403 represents the magnitude of the twenty-nine harmonic of a symmetrical fan for rotations between zero and eighteen thousand revolutions per minute.
- the curve 404 represents the magnitude of the twenty-nine order harmonic of an embodiment 100 of a fan object of the present invention for rotations between zero and eighteen thousand revolutions per minute.
- Curves 403 and 404 were obtained by the inventors from tests.
- curve 403 is in every point greater than the curve 404.
- the difference in amplitude between the curve 403 and the curve 404 is greater than three dB (A) W at certain points of the curve.
- Curves 403 and 404 are strictly increasing.
- the maximum reached by curve 403 over the measurement range is close to ninety dB (A) W and the maximum reached by curve 404 over the measurement range is close to eighty-eight dB (A). W.
- Curve 403 is less than fifty dB (A) W from zero to about two thousand nine hundred revolutions per minute.
- Curve 404 is less than fifty dB (A) W from zero to about three thousand two hundred revolutions per minute.
- the twenty-nine harmonic due to the rotation of a symmetrical fan 30 therefore appears earlier and produces more noise than the twenty-nine harmonic due to the rotation of a symmetrical fan 10.
- FIG. 5 shows a front view of a particular embodiment of a fan that is the subject of the present invention.
- the device comprises blades 501.
- the number of blades 501 is a prime number.
- the device may comprise blades arranged perpendicularly to one face.
- the face may comprise an axial hole 512 receiving a shaft of a rotor of a rotating electrical machine.
- the face is preferably described by an outside diameter.
- the blades 501 can be straight.
- the blades are convex or concave.
- the length of the blade can be defined as the length of the intersection curve between the outer face of the blade and the face of the fan with the blades.
- the lengths 11, 12, 13, 14, 15, 16, 17, 18, 19, 110 and 11 1 of the blades 501 to 51 1 respectively are such that 11 is less than 12 which is less than 13 and so on, the greatest length being 11 1.
- the progressivity between the length 11 of a blade 501 and the length 12 of a blade 502 can be characterized by a positive function.
- this function is linear and has a strictly positive coefficient of orientation.
- the steering coefficient is strictly greater than 1.
- the ratio between the length 11 1 of the largest blade 51 1 and the length 11 of the smallest blade 501 is greater than 1, 2.
- the progressivity of the length of the blades is preferentially applied to all the blades.
- the progressivity of the blade length is applied to at least three blades.
- the blades are the same height, for example.
- the minimum arc length between two blades is greater than three millimeters.
- the smallest distance between two consecutive blades is greater than three millimeters.
- the arc length can be calculated between two blade tip points of two adjacent blades.
- FIG. 6 shows a front view of a particular embodiment of a fan that is the subject of the present invention.
- the device comprises blades 601.
- the number of blades 601 is a prime number.
- the device may comprise blades arranged perpendicularly to one face.
- the face may comprise an axial hole 609 receiving a shaft of a rotor of a rotating electrical machine.
- the face may preferentially be described by an outside diameter.
- Blades 601 can be straight.
- the blades are convex or concave.
- the length of the blade can be defined as the length of the intersection curve between the outer face of the blade and the face of the fan with the blades.
- the lengths 11, 12, 13, 14, 15, 16, 17, 18, 19, 110 and 11 1 of the blades are such that 11 is less than 12 which is less than 13 and so on, the length larger being 11 1.
- the progressivity between the length 11 of a blade 601 and the length 12 of a blade 603 can be characterized by a positive function.
- this function is linear and of a directing coefficient strictly positive.
- the steering coefficient is strictly greater than 1.
- the ratio between the length 11 1 of the largest blade and the length 11 of the smallest blade may be greater than 1, 2.
- the progressivity of the length of the blades is preferentially applied to all the blades.
- the progressivity of the blade length is applied to at least three blades.
- the blades are the same height, for example.
- Tilt angles between the blades may follow a gradual distribution.
- An inclination angle 605 can be defined between:
- end point of blade a characteristic point called "end point of blade” which can be the point of the blade, on the face of the fan comprising the blades and on the outer face of the blade, the furthest away from the axis of rotation of the fan and
- blade start point which may be the point of the blade, on the face of the fan having the blades and on the outer face of the blade, the closest to the axis of rotation of the fan;
- Progressivity between a tilt angle 605 and an adjacent tilt angle 608 can be characterized by a positive function.
- this function is linear and has a strictly positive coefficient of orientation.
- the steering coefficient is strictly greater than 1.
- the progressivity of the angular inclination of the blades is preferentially applied to all the blades. In embodiments, the progressivity of the angular inclination is applied to at least three blades.
- the ratio between the smallest inclination angle 605 and the largest inclination angle 610 is preferably greater than 1, 2.
- the progressivity of the inclination angles and the progressivity of the lengths are linked by a function.
- the minimum arc length between two blades is greater than three millimeters.
- the smallest distance between two consecutive blades is greater than three millimeters.
- the arc length can be calculated between two blade tip points of two adjacent blades.
- FIG. 7 shows a perspective view of a particular embodiment 70 of a fan that is the subject of the present invention.
- the device comprises blades 701.
- the number of blades is a prime number.
- the device may comprise blades arranged perpendicularly to one face.
- the face may comprise an axial hole 704 receiving a shaft of a rotor of a rotating electrical machine.
- the face is preferably described by an outside diameter.
- the blades 701 can be straight.
- the blades are convex or concave.
- the height of the blade may be defined as a dimension taken perpendicular to the face having the blades between the face having the blades and the point of the blade furthest from the face with the blades.
- the progressivity between the height of a blade 701 and the height of a blade 702 can be characterized by a positive function.
- this function is linear and has a strictly positive coefficient of orientation.
- the director coefficient is strictly greater than 1.
- the ratio between the height of the largest blade and the height of the smallest blade may be greater than 1, 2.
- the progressivity of the pitch of the blades is preferentially applied to all the blades.
- the progressivity of the blade height is applied to at least three blades.
- the minimum arc length between two blades is greater than three millimeters.
- the smallest distance between two consecutive blades is greater than three millimeters.
- the arc length can be calculated between two blade tip points of two adjacent blades.
- the face comprising the blades may comprise a progressive material distribution 703 configured to balance the fan according to the progressiveness of the heights.
- the progressive material distribution is performed by adding material with respect to a fan according to an embodiment 70 without progressive material distribution.
- the addition of progressive material can be made at the time of manufacture of the piece.
- the addition of material may be a deposit of material whose quantity increases by following the circumference of the fan in a given direction.
- the addition of material can be located around an axial hole of the fan.
- the progressive material distribution by adding material is located on a face of the fan parallel to the face with the blades.
- the progressive material distribution is achieved by removal of material.
- FIG. 8 shows a perspective view of a particular embodiment 80 of a fan that is the subject of the present invention.
- Embodiment 80 may include pitch escalation for at least three blades and length escalation for at least three other blades.
- the progressivity is applied to adjacent blades.
- groups of at least three blades can:
- two groups of at least three different blades have the same progressivity among the choices mentioned in the previous paragraph.
- the features of progressivity may be the same or different.
- the spacing angle is defined as being between:
- blade tip point which may be the point of the blade, on the face of the fan comprising the blades and on the outer face of the blade, furthest from the axis of rotation of the fan and
- the angle of inclination is defined as being between:
- end point of blade a characteristic point called "end point of blade” which can be the point of the blade, on the face of the fan comprising the blades and on the outer face of the blade, the furthest away from the axis of rotation of the fan and
- blade start point which may be the point of the blade, on the face of the fan having the blades and on the outer face of the blade, the closest to the axis of rotation of the fan;
- the device comprises blades 801.
- the number of blades is a prime number.
- the device may comprise blades arranged perpendicularly to one face.
- the face may comprise an axial hole 806 receiving a shaft of a rotor of a rotating electrical machine.
- the face is preferably described by an outside diameter.
- Blades 801 can be straight.
- the blades are convex or concave.
- Part of the blades may have a progressiveness in height and another part of the blades may have progressivity in length.
- the progressivity between the length of a blade 801 and the length of a blade 802 can be characterized by a positive function.
- this function is linear and has a strictly positive coefficient of orientation.
- the steering coefficient is strictly greater than 1.
- the ratio between the length of the largest blade and the length of the smallest blade may be greater than 1, 2.
- the progressivity of the blade length is applied to at least three blades. The blades to which the progressiveness of length is applied are of the same height, for example.
- the progressivity between the height of a blade 803 and the height of a blade 804 can be characterized by a positive function.
- this function is linear and has a strictly positive coefficient of orientation.
- the steering coefficient is strictly greater than 1.
- the ratio between the height of the highest blade and the height of the lowest blade can be greater than 1, 2.
- the progressivity of the blade height is applied to at least three blades.
- the blades to which the progressiveness of height is applied are of the same length, for example.
- the minimum arc length between two blades is greater than three millimeters.
- the smallest distance between two consecutive blades is greater than three millimeters.
- the arc length can be calculated between two blade tip points of two adjacent blades.
- the face comprising the blades may comprise a progressive material distribution 805 configured to balance the fan according to the progressivity of the heights and lengths.
- the progressive material distribution is effected by removal of material with respect to a fan according to an embodiment 80 without progressive material distribution.
- Progressive material removal can be realized at the time of manufacture of the part or during a subsequent machining.
- At least two features are progressive and are selected from the group consisting of:
- FIG. 9 shows a perspective view of a particular embodiment 90 of a fan that is the subject of the present invention.
- Embodiment 90 may include a progressivity of height and length for at least three blades.
- the progressivity of height can be a function of the progressivity of length.
- the height may vary proportionally to the length.
- dual progressivity is applied to all blades.
- at least two characteristics are progressive and the characteristics of the progressivities are linked by a function.
- Features that can be progressive are:
- the spacing angle is defined as being between:
- end point of blade a characteristic point called "end point of blade” which can be the point of the blade, on the face of the fan comprising the blades and on the outer face of the blade, the furthest away from the axis of rotation of the fan and
- the angle of inclination is defined as being between:
- end point of blade a characteristic point called "end point of blade” which can be the point of the blade, on the face of the fan comprising the blades and on the outer face of the blade, the furthest away from the axis of rotation of the fan and
- blade start point which may be the point of the blade, on the face of the fan having the blades and on the outer face of the blade, the closest to the axis of rotation of the fan; a line passing through the corresponding characteristic points on the adjacent blade.
- At least two groups of at least three different blades may have the same progressivity.
- the features of progressivity may be the same or different.
- a portion of the blades may have a progressivity of several characteristics and another portion of the blades may have a progressivity of several different characteristics.
- Embodiment 90 comprises two pieces 903 and 904 assembled. Preferably, the assembly is done by welding.
- the part 903 may comprise blades 901.
- the part 904 may comprise blades 902.
- the number of blades of the device is a prime number. For example, the sum of the number of blades 901 and the number of blades 902 is a prime number.
- the device may comprise blades arranged perpendicularly to one face.
- the face may comprise an axial hole 905 receiving a shaft of a rotor of a rotating electrical machine.
- the face may preferentially be described by an outside diameter.
- Blades 901 and 902 may be straight.
- the blades are convex or concave.
- the progressivities of the device can be characterized by positive functions. Preferably, these functions are linear and of strictly positive coefficients. In embodiments, the guiding coefficients are strictly greater than 1. The ratio between the characteristic of the largest blade and the characteristic of the smallest blade may be greater than 1, 2.
- the minimum arc length between two blades is greater than three millimeters.
- the smallest distance between two consecutive blades is greater than three millimeters.
- the arc length can be calculated between two blade tip points of two adjacent blades.
- the face comprising the blades may comprise a progressive material distribution configured to balance the fan according to the progressivity of the heights and lengths.
- the progressivity of the blades may be independent of the direction of rotation of the fan.
- Both pieces can be:
- the two parts have the same material and the same method of manufacture.
- FIG. 10 shows a particular embodiment of a vehicle 1000 which is the subject of the present invention.
- the vehicle 1000 may comprise a rotary electric machine such as a motor, an alternator or an alternator-starter which comprises at least one fan 100.
- the vehicle 1000 comprises an embodiment 20, 50, 60, 70, 80, 90 or any other embodiment mentioned above of the fan object of the present invention.
- the vehicle comprises two fans among the embodiments mentioned above. Both fans can be identical.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1454286A FR3021171B1 (fr) | 2014-05-14 | 2014-05-14 | Ventilateur de machine electrique tournante |
PCT/FR2015/051041 WO2015173485A2 (fr) | 2014-05-14 | 2015-04-17 | Ventilateur de machine électrique tournante |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3143681A2 true EP3143681A2 (fr) | 2017-03-22 |
Family
ID=51688147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15725752.8A Withdrawn EP3143681A2 (fr) | 2014-05-14 | 2015-04-17 | Ventilateur de machine électrique tournante |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170146031A1 (fr) |
EP (1) | EP3143681A2 (fr) |
FR (1) | FR3021171B1 (fr) |
WO (1) | WO2015173485A2 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN206617363U (zh) * | 2017-03-01 | 2017-11-07 | 讯凯国际股份有限公司 | 叶轮 |
EP3988800B1 (fr) * | 2019-06-20 | 2024-08-07 | Mitsubishi Electric Corporation | Ventilateur centrifuge et machine électrique tournante |
CN110985412A (zh) * | 2019-11-14 | 2020-04-10 | 中国航天空气动力技术研究院 | 一种基于非对称叶轮的低噪声多翼离心风机 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4253800A (en) * | 1978-08-12 | 1981-03-03 | Hitachi, Ltd. | Wheel or rotor with a plurality of blades |
US7207779B2 (en) * | 2004-08-18 | 2007-04-24 | Sunonwealth Electric Machine Industry Co., Ltd. | Impeller for radial-flow heat dissipating fan |
US8398380B2 (en) * | 2009-09-02 | 2013-03-19 | Apple Inc. | Centrifugal blower with non-uniform blade spacing |
US20130251533A1 (en) * | 2012-03-23 | 2013-09-26 | Bullseye Power LLC | Compressor wheel |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE946178C (de) * | 1953-11-05 | 1956-07-26 | Schiele & Co Maschinenfabrik U | Fluegelrad fuer Axialgeblaese mit verminderter Geraeuschbildung |
DE2935923C2 (de) * | 1979-09-06 | 1986-09-04 | Robert Bosch Gmbh, 7000 Stuttgart | Lüfterrad für elektrische Maschinen |
FR2659506B1 (fr) * | 1990-03-08 | 1995-06-02 | Valeo Equip Electr Moteur | Procede de fabrication d'une roue de ventilateur pour machines tournantes electriques, notamment pour alternateurs de vehicules automobiles, et roue de ventilateur obtenue par un tel procede. |
FR2743952B1 (fr) * | 1996-01-19 | 2004-01-02 | Valeo Equip Electr Moteur | Ventilateur pour alternateur, notamment de vehicule automobile, et alternateur l'incorporant |
FR2850805B1 (fr) * | 2002-12-16 | 2009-01-09 | Valeo Equip Electr Moteur | Dispositif de ventilation pour machine electrique tournante |
FR2866993B1 (fr) * | 2004-02-27 | 2006-04-28 | Valeo Equip Electr Moteur | Ensemble rotorique dont au moins un espace intergriffes est obture par le ventilateur |
TWI505768B (zh) * | 2013-04-10 | 2015-10-21 | Delta Electronics Inc | 離心式風扇及其扇葉 |
-
2014
- 2014-05-14 FR FR1454286A patent/FR3021171B1/fr active Active
-
2015
- 2015-04-17 US US15/310,246 patent/US20170146031A1/en not_active Abandoned
- 2015-04-17 WO PCT/FR2015/051041 patent/WO2015173485A2/fr active Application Filing
- 2015-04-17 EP EP15725752.8A patent/EP3143681A2/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4253800A (en) * | 1978-08-12 | 1981-03-03 | Hitachi, Ltd. | Wheel or rotor with a plurality of blades |
US7207779B2 (en) * | 2004-08-18 | 2007-04-24 | Sunonwealth Electric Machine Industry Co., Ltd. | Impeller for radial-flow heat dissipating fan |
US8398380B2 (en) * | 2009-09-02 | 2013-03-19 | Apple Inc. | Centrifugal blower with non-uniform blade spacing |
US20130251533A1 (en) * | 2012-03-23 | 2013-09-26 | Bullseye Power LLC | Compressor wheel |
Also Published As
Publication number | Publication date |
---|---|
WO2015173485A3 (fr) | 2016-04-14 |
FR3021171B1 (fr) | 2020-09-04 |
WO2015173485A2 (fr) | 2015-11-19 |
FR3021171A1 (fr) | 2015-11-20 |
US20170146031A1 (en) | 2017-05-25 |
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