EP1382857A2 - Elektromotorisch betriebenes Gebläse - Google Patents
Elektromotorisch betriebenes Gebläse Download PDFInfo
- Publication number
- EP1382857A2 EP1382857A2 EP03014027A EP03014027A EP1382857A2 EP 1382857 A2 EP1382857 A2 EP 1382857A2 EP 03014027 A EP03014027 A EP 03014027A EP 03014027 A EP03014027 A EP 03014027A EP 1382857 A2 EP1382857 A2 EP 1382857A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- diffuser
- cap
- bead
- particular according
- 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
Images
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
- 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
- F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- 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
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
Definitions
- the invention relates to an electric motor with a stator and a rotor, an impeller connected to the rotor and an associated fixed one Diffuser, the impeller together with the diffuser from a cap open in the middle is overlaid.
- Electric motors of the type in question are known and are used, for example in vacuum cleaners. Furthermore, such electric motors Sound reduction measures known, for example in the form of the engine or Motor-blower unit downstream damping elements. Examples are patent applications WO 97/41631 and EP 0 528 451 A1. A solution is also known from DE 23 54 126 A1, in which sound-absorbing materials are introduced directly into the impeller are. EP 0186 891 D1 proposes on the motor side Blading to install slit-shaped chambers due to a resonator effect should dampen the sound.
- the lining of an impeller with a sound-absorbing material is included the generally high speeds of electric motors, in particular Vacuum cleaner motor-blower units with enormous technical effort and correspondingly high costs.
- the durability the attachment of the absorption material with the high centrifugal forces an outstanding Problem.
- the sound-absorbing element lying in the bead-like configuration is held in a stationary manner and is arranged on the inside of the housing of the electric motor or of the entire motor-blower unit in association with the likewise fixed diffuser. It is further preferred that the bead-like shape is aligned in a ring-shaped manner coaxial to the motor / blower axis, as a result of which there is no imbalance on the motor-blower unit due to dust deposits or structural changes in the damping measure due to aging.
- a radially inner foot region of the bead-like configuration is supported on the diffuser.
- the sound damping element is a foam strip.
- the absorption material can furthermore be introduced as a ring blank, endless cord, strip product or as a slit strip in a pre-assembly stage in the bead-like shape of the cap.
- the foam strip consists of open-pore foam such as, for example, polyurethane. It is also advantageous that the foam strip is closed like a ring.
- the bead-like shape is integrated on the circumferential side of the electric motor into the circumferential wall of the cap, so that the radial dimensions of the overall unit are retained even through the arrangement of the sound-absorbing element.
- the bead-like shape has an extension in the axial direction of the electric motor that is less than an extension of a protuberance of the central cap opening in the axial direction.
- the height of the protuberance (tulip) of the suction area (cap opening) is greater than the depth of the bead-like shape, so that this does not lead to an increase in the axial length of the motor or the unit.
- the height ratio of the depth of projection to the protuberance is approximately 0.2 to 1.0.
- the diameter ratio of the inside and outside diameter of the circumferential bead-like shape lies in the range between 1.1 to 1.4.
- the impeller diameter there is a ratio of the inner diameter to the impeller diameter of approximately 1.05 to 1.4. It is also provided that the sound-absorbing element rests on the end faces of the diffuser blades, the latter also being able to run obliquely towards the associated flat underside of the sound-absorbing element.
- the absorption material is held by the diffuser equipped with a large number of blades, which lies with its blade tips directed towards the motor axis on the transition edge of the expression to the protruding area of the cap.
- the diffuser support surface in the cap forming a blower cover is only approx. 40% of the radial diffuser blade height.
- the diffuser blades are essentially sealed by the sound-absorbing element, which spatially limits the requirements for the flatness of the diffuser blade support surface in the blower cover or in the cap and the flatness of the diffuser blades.
- the sound-absorbing element preferably in the form of an open-cell foam
- the weight increase of the motor-blower unit is less than 1%, with a density of the absorption material of less than 100 kg / m 3 being selected.
- the damping material can be introduced in a pre-assembly stage, whereby the further assembly process remains undisturbed.
- the requirements for the evenness of the diffuser support surface and the diffuser blades are reduced to a minimum due to the compensating function of the sound damping element.
- a cap 1 is shown and described for a cap as in FIG. 3
- Motor-blower unit 2 shown.
- the latter is set, such as from the 3, essentially from a fast-running Electric motor 3 with a stator 4 and a rotor 5 and one a motor shaft 6 attached fan wheel 7, the rotor 5 and the stator 4 are accommodated in a motor housing 8.
- the impeller 7 and a diffuser 9 associated therewith, the latter being rotatably fixed on a bearing bracket 10 of the electric motor 3 is attached, of which, a blower pot forming cap 1 covers.
- This cap 1 has in the area of the pot bottom a central suction opening 12 provided with a protuberance 11.
- the cap 1 has an annular circumference and in the installed state in the direction open to the electric motor 3, bead-like expression 13, the Arrangement is further selected so that the bead-like expression 13 on the circumference of the electric motor 3 integrated into the peripheral wall 14 of the cap 1 is.
- the arrangement is further selected so that the cap 1 is in the radial area inner foot area 14 of the bead-like expression 13 itself on the diffuser 9 or is supported on its diffuser blades 16.
- a sound absorbing element 17 is in the shape of the bead 13 an open-pore foam such as, for example, polyurethane, which Soundproofing element 17 as a ring blank, endless cord, strip goods or can be present as a slotted strip, with a damping element cross section is adapted to the cross-section.
- the extent of the bead-like shape measured by a cap base 18 13 in the axial direction of the electric motor 3 is chosen to be less than that axial extent of the protuberance 11 in the area measured from the cap base 18 the suction opening 12, wherein a height ratio of bead depth a to Ausstülpungs ban b in the illustrated embodiment of about 0.6 is selected.
- the ratio of the inner diameter x to the outer diameter y of the circumferential Expression 13 is approximately in the illustrated embodiment 0.9. In relation to the impeller diameter z, there is a diameter ratio from inside protrusion diameter x to impeller diameter z from about 1.3.
- this sound-absorbing element 17 lies in the operational state of the motor-blower unit 2 according to FIG. 3 at least partially on the end faces of the diffuser blades 16. So the soundproofing element 17 by the one equipped with a large number of blades 16 Diffuser 9 held, which blades 16 with their directed towards the motor axis Blade tips on the transition edge of the expression 13 to the turned out Area 11, i.e. rest in the foot area 15.
- the diffuser support surface in the cap 1 is only about 40% according to this arrangement according to the invention the radial diffuser blade height.
- the sealing of the diffuser blades 16 takes place essentially through the sound-absorbing element 17, with which the requirement the flatness of the diffuser support surface in the cap 1 and the Flatness of the diffuser blades 16 are spatially limited.
- the sound damping element 17 is responsible for the formation of the Airborne dominant area arranged, namely in the place of interaction of Blower wheel 7 and diffuser 9, as well as in the area of the diffuser 9 itself.
- the soundproofing element is due to the selected design 17 easy to use during assembly. Also is chosen by the Design of the expression 13 neither the radial nor the axial installation space the entire motor-blower unit 2 is enlarged.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Frames (AREA)
- Power Steering Mechanism (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
Description
- Fig. 1
- einen Querschnitt durch eine Kappe eines Elektromotors, mit einem in einer sickenartigen Ausprägung der Kappe eingebrachten Schalldämpfungselement;
- Fig. 2
- eine Innenansicht der Kappe mit Blick auf das ringartig geschlossene Schalldämpfungselement;
- Fig. 3
- einen Schnitt durch einen Elektromotor mit einem Gebläserad und einem Diffusor, wobei das Gebläserad zusammen mit dem Diffusor von der Kappe gemäß Fig. 1 überfangen ist.
Claims (10)
- Elektromotor (3) mit einem Stator (4) und einem Rotor (5), einem mit dem Rotor (5) verbundenen Gebläserad (7) und einem zugeordneten, feststehenden Diffusor (9), wobei das Gebläserad (7) zusammen mit dem Diffusor (9) von einer mittig offenen Kappe (1) überfangen ist, dadurch gekennzeichnet, dass innerhalb der Kappe (1), zugeordnet dem Diffusor (9) ein Schalldämpfungselement (17) angeordnet ist.
- Elektromotor nach Anspruch oder insbesondere danach, dadurch gekennzeichnet, dass das Schalldämpfungselement (17) in einer stirnseitig des Elektromotors (3) ausgebildeten, sickenartigen Ausprägung (13) der Kappe (1) aufgenommen ist.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass die sickenartige Ausprägung (13) zum Inneren des Elektromotors (3) hin ein umlaufender Ringraum ist.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass ein radial innerer Fußbereich (15) der sickenartigen Ausprägung (13) abstützend auf dem Diffusor (9) aufsitzt.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass das Schalldämpfungselement (17) ein Schaumstoffstreifen ist.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass der Schaumstoffstreifen aus offenporigem Schaumstoff besteht.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass der Schaumstoffstreifen ringartig geschlossen ist.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass die sickenartige Ausprägung (13) umfangsseitig des Elektromotors (3) in die Umfangswandung (14) der Kappe (1) integriert ist.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass die sickenartige Ausprägung (13) eine Erstreckung (a) in Axialrichtung des Elektromotors (3) aufweist, die geringer ist als eine Erstreckung (b) einer Ausstülpung (11) der mittigen Kappenöffnung in Axialrichtung.
- Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass das Schalldämpfungselement (17) auf den Stirnseiten der Diffusorschaufeln (16) anliegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10232730A DE10232730A1 (de) | 2002-07-19 | 2002-07-19 | Elektromotor mit einem Stator und einem Rotor |
DE10232730 | 2002-07-19 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1382857A2 true EP1382857A2 (de) | 2004-01-21 |
EP1382857A3 EP1382857A3 (de) | 2004-09-08 |
EP1382857B1 EP1382857B1 (de) | 2008-07-23 |
Family
ID=29762055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03014027A Expired - Lifetime EP1382857B1 (de) | 2002-07-19 | 2003-06-23 | Elektromotorisch betriebenes Gebläse |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1382857B1 (de) |
AT (1) | ATE402345T1 (de) |
DE (2) | DE10232730A1 (de) |
ES (1) | ES2305370T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101832282A (zh) * | 2010-04-29 | 2010-09-15 | 中国船舶重工集团公司第七一二研究所 | 低振动通风机 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1037291B (de) * | 1955-02-17 | 1958-08-21 | Baier Wilhelm Kg | Luftverteilungsvorrichtung fuer Fahrzeuge |
DE2354126A1 (de) * | 1973-10-29 | 1975-04-30 | Phonotherm Laerm Und Erschuett | Radialventilator |
EP0385298A2 (de) * | 1989-03-01 | 1990-09-05 | Hitachi, Ltd. | Elektrogebläse mit Abluftrückführkanal |
DE19606146A1 (de) * | 1996-02-20 | 1997-08-21 | Vorwerk Co Interholding | Schnellaufender Elektromotor |
-
2002
- 2002-07-19 DE DE10232730A patent/DE10232730A1/de not_active Withdrawn
-
2003
- 2003-06-23 ES ES03014027T patent/ES2305370T3/es not_active Expired - Lifetime
- 2003-06-23 AT AT03014027T patent/ATE402345T1/de not_active IP Right Cessation
- 2003-06-23 EP EP03014027A patent/EP1382857B1/de not_active Expired - Lifetime
- 2003-06-23 DE DE50310184T patent/DE50310184D1/de not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1037291B (de) * | 1955-02-17 | 1958-08-21 | Baier Wilhelm Kg | Luftverteilungsvorrichtung fuer Fahrzeuge |
DE2354126A1 (de) * | 1973-10-29 | 1975-04-30 | Phonotherm Laerm Und Erschuett | Radialventilator |
EP0385298A2 (de) * | 1989-03-01 | 1990-09-05 | Hitachi, Ltd. | Elektrogebläse mit Abluftrückführkanal |
DE19606146A1 (de) * | 1996-02-20 | 1997-08-21 | Vorwerk Co Interholding | Schnellaufender Elektromotor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101832282A (zh) * | 2010-04-29 | 2010-09-15 | 中国船舶重工集团公司第七一二研究所 | 低振动通风机 |
Also Published As
Publication number | Publication date |
---|---|
EP1382857A3 (de) | 2004-09-08 |
EP1382857B1 (de) | 2008-07-23 |
DE50310184D1 (de) | 2008-09-04 |
DE10232730A1 (de) | 2004-02-05 |
ES2305370T3 (es) | 2008-11-01 |
ATE402345T1 (de) | 2008-08-15 |
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