EP1555440A2 - Dispositif de convoyage, en particulier rotor ou stator, pour convoyer un medium fluide, de préférence un gaz - Google Patents

Dispositif de convoyage, en particulier rotor ou stator, pour convoyer un medium fluide, de préférence un gaz Download PDF

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Publication number
EP1555440A2
EP1555440A2 EP04029745A EP04029745A EP1555440A2 EP 1555440 A2 EP1555440 A2 EP 1555440A2 EP 04029745 A EP04029745 A EP 04029745A EP 04029745 A EP04029745 A EP 04029745A EP 1555440 A2 EP1555440 A2 EP 1555440A2
Authority
EP
European Patent Office
Prior art keywords
circumferential distance
blades
circumferential
distance
group
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
Application number
EP04029745A
Other languages
German (de)
English (en)
Other versions
EP1555440B1 (fr
EP1555440A3 (fr
Inventor
Jan Krüger
Frank Castor
Manfred Nicolai
Thomas Rose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1555440A2 publication Critical patent/EP1555440A2/fr
Publication of EP1555440A3 publication Critical patent/EP1555440A3/fr
Application granted granted Critical
Publication of EP1555440B1 publication Critical patent/EP1555440B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/40—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

  • the present invention relates to a conveying member, so for example a Rotor or a stator, through which a fluid medium, in general a gaseous medium, for example, but also a liquid medium, is promoted.
  • a half-shell-like ausgestaltetes Conveyor wheel with a plurality of circumferentially about an axis of rotation
  • This conveyor wheel is equipped with successive blades.
  • This Conveyor wheel rotates with its bearing the blades over a field Ring channel on a housing, facing at its the conveyor wheel Side is open. Due to the rotation of the feed wheel, the air to be conveyed aspirated through an inlet opening, compressed or preceded and discharged again in the region of an outlet opening.
  • a so-called breaker through which the otherwise annular continuous, provided in the housing Channel is interrupted.
  • Periodic excitations are generated.
  • the excitation frequency corresponds to the speed of the feed wheel multiplied by the number of provided on the feed wheel blades.
  • Schneidenton with a characteristic frequency For example, be generated in the range of about 1500 Hz, the other Sound spectrum is superimposed and clear about this spectrum protrudes. To the perceptibility of this sound or such sounds to reduce mufflers are often used to the Transporting the noise in the conveyed medium, ie the air, too difficult.
  • a conveying member in particular a rotor or a stator, for conveying a flowable medium provide, by which conveyor organ production more characteristic Noise can be further reduced.
  • a conveying member in particular Rotor or stator, to promote a flowable, preferably gaseous medium comprising a plurality of in a circumferential direction around a central axis with circumferential spacing on each other following arranged blades, wherein in at least a part of the Shovels comprehensive group of directly in a circumferential direction successive blades either a first circumferential distance or a second one different from the first circumferential distance Circumferential distance to a circumferentially following each blade is provided and wherein between at least two directly adjacent blades, the first circumferential distance is provided and between at least two immediately adjacent blades the second circumferential distance is provided.
  • the blades of the group of blades in the circumferential direction is the sequence of first circumferential distance and second Perimeter distance of a pseudorandom binary sequence or a partial sequence thereof, each of the two binary states being circumferentially spaced first circumferential distance and second circumferential distance equivalent.
  • first circumferential distance and second circumferential distance occurs in the group of blades at a frequency of 0.5 ⁇ 2 Z, and the other circumferential distance of first circumferential distance and second circumferential distance at a frequency of 0.5 ⁇ 2 Z - 1 occurs.
  • the group of blades includes all blades and is also closed ring-like, i.e. at the conveying member at all only the first circumferential distance and the second circumferential distance occur, corresponds to that of the group of Shovels, so all shovels, occupied the entire angular range Angular range of 360 °.
  • the first blade and the last blade is not the first circumferential distance or the second Circumferential clearance provided or does not include the group of blades all blades, so is the occupied by this group angle range of the first bucket to the last bucket of the group of buckets basically less than 360 °.
  • first circumferential distance and the second circumferential distance may not occur with the same frequency and insofar as it can be ensured by introducing the correction term ⁇ that all blades of the group in each case to the following in the circumferential direction Vane of the group either the first or the second circumferential distance can have.
  • the feed wheel 10 has on a hub 12, which likewise represents a shell or a housing of the feed wheel 10, a plurality of circumferentially about a rotational axis or a center A of this feed wheel 10 successively distributed blades S1-S7. It can be seen that the vanes immediately following one another in the circumferential direction U either have a circumferential spacing a from one another or a circumferential spacing b. This results in a sequence of circumferential distances a, b, which is represented by the binary sequence: aaabab b.
  • the term "circumferential distance” means which circumferential position or relative circumferential position occupy the individual blades S i on the conveying member.
  • the circumferential distance insofar as it is represented as an angular distance, can represent the circumferential angle between two reference points or reference areas on the blades under consideration, the reference points or reference areas to be selected on the different blades corresponding to each other.
  • the arrangement of the individual blades S i in the sequence specified ensures that the noises generated during movement past a stationary assembly, such as the breaker of a side channel blower, form a continuous spectrum essentially in the form of a white noise, without at certain frequencies outstanding peaks in the spectrum would be present.
  • a stationary assembly such as the breaker of a side channel blower
  • FIG. 2 shows a section which shows two blades S i and S i + 1 which follow one another immediately after one another. These have the angular distance b to each other.
  • This angular distance b is composed of a total of three angle components. This is on the one hand an angle ⁇ 0 , and on the other hand are two smaller angles ⁇ and ⁇ .
  • the angle ⁇ 0 corresponds to a basic angle, which can be determined, for example, by dividing the total available angular range of 360 ° by the number n of blades or circumferential distances a, b present in the conveying wheel 10. In the case of the feed wheel 10 of FIG. 1, the number n would be equal to 7, so that for the basic angle ⁇ 0, a value of about 51.4 ° results.
  • the angle ⁇ represents a change angle by which the immediately consecutive blades S i and S i + 1 are basically shifted with respect to each other starting from the basic angle ⁇ 0 to each other.
  • the change angle ⁇ is added to the basic angle ⁇ 0 .
  • the larger angular distance b occurs only three times, while the smaller angular distance a occurs four times. This is, among other things, a consequence of the fact that in each pseudorandom binary sequence, which basically has an odd number of terms, one of the binary states occurs once more than the other binary state.
  • the binary state a so the smaller angular distance a, once more often exists, as the angular distance b. If one were to reduce or increase the basic angle ⁇ 0 for determining the angular distances a and b by the magnification angle ⁇ , which may be 5 ° in an assumed example, this would result in an angle of approximately 46.4 ° for the angular distance a and for the angular distance b is an angle of about 56.4 °. In the conveyor wheel 10 shown in Fig. 1, this would give a total angle of about 355 °, since once more 5 ° are deducted, as to be counted.
  • a correction term ⁇ is introduced, which is defined by the Size of the enlargement angle ⁇ divided by the number of blades or the spaces between them, ie in the assumed case is about 0.7 °.
  • This correction term ⁇ is added to each angle ⁇ 0 + ⁇ or ⁇ 0 - ⁇ in order to come back to 360 ° in the sum. If the angular distance b were present with the frequency 4, while the angular distance a would then be present with the frequency 3, the same procedure could be used.
  • the correction term ⁇ would have a negative sign and thus would generally lead to a reduction of the mutual angular distances. For example, if one of the angular distances a, b were present at a frequency greater than 1 greater than the frequency of the other angular distance, this would be possible if the distribution deviated from a pseudorandom binary sequence and moved to any other binary sequence Thus, the correction term ⁇ would result from the angle of change ⁇ multiplied by the frequency difference (in the case described above this was 1) and divided by the number of blades or the spaces between them.
  • the basic angle ⁇ 0 basically corresponds to the angle covered by the group of blades in which the relative distance is selected according to a binary sequence.
  • this basic angle ⁇ 0 can be divided by dividing the total angle by the number of blades and thus also the number of spaces between the individual blades be determined.
  • the addressed correction term ⁇ is not introduced such that there is a different circumferential distance between the first blade and the last blade, the basic angle ⁇ is 0 between the individual blades of the group of blades by dividing the angle occupied by the group of blades by the number of blades reduced by the number 1 when the group of blades is terminated by the first blade leading to a subsequent blade does not have the first circumferential distance or the second circumferential distance, since then a blade more than circumferential distances is present.
  • the group of blades is defined by the blades each having the circumferential clearance thereon in the circumferential direction, then in the circumferential direction the group of blades does not end with a blade but a circumferential distance, so that there are as many circumferential clearances as blades in the group are and thus the sharing is done only by the number of blades and thus the number of circumferential distances.
  • the group of blades is not closed in an annular manner and in that there is an angular distance or distance between at least two blades of the impeller, which is different from the two distances occurring in the group of blades, the introduction of the addressed correction terms ⁇ be waived.
  • a conveying wheel 10 in which the conveying blades S1-S7 are arranged in accordance with the specification of a third-order pseudorandom binary sequence.
  • one of the 15 possible third-order pseudorandom binary sequences would be given by aaaababaabbabb b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP04029745A 2004-01-13 2004-12-15 Dispositif de convoyage, en particulier rotor ou stator, pour convoyer un medium fluide, de préférence un gaz Expired - Fee Related EP1555440B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004001845A DE102004001845A1 (de) 2004-01-13 2004-01-13 Förderorgan, insbesondere Rotor oder Stator, zur Förderung eines fließfähigen, vorzugsweise gasförmigen, Mediums
DE102004001845 2004-01-13

Publications (3)

Publication Number Publication Date
EP1555440A2 true EP1555440A2 (fr) 2005-07-20
EP1555440A3 EP1555440A3 (fr) 2005-11-30
EP1555440B1 EP1555440B1 (fr) 2009-03-04

Family

ID=34609529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04029745A Expired - Fee Related EP1555440B1 (fr) 2004-01-13 2004-12-15 Dispositif de convoyage, en particulier rotor ou stator, pour convoyer un medium fluide, de préférence un gaz

Country Status (3)

Country Link
US (1) US7651316B2 (fr)
EP (1) EP1555440B1 (fr)
DE (2) DE102004001845A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3020416A1 (fr) * 2014-04-29 2015-10-30 Peugeot Citroen Automobiles Sa Ventilateur pour machine electrique tournante de vehicule automobile

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI328081B (en) * 2007-04-04 2010-08-01 Delta Electronics Inc Fan and impeller thereof
CN103225628A (zh) * 2009-02-23 2013-07-31 建准电机工业股份有限公司 轴流式散热风扇的扇框
CN101813100B (zh) * 2009-02-23 2014-11-12 建准电机工业股份有限公司 轴流式散热风扇的扇框
EP2696078B1 (fr) * 2012-08-09 2019-10-02 MTU Aero Engines AG Rotor à aubage pour une turbomachine et procédé d'assemblage associé
JP7363328B2 (ja) * 2019-10-09 2023-10-18 ニデック株式会社 インペラおよび軸流ファン

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2524555A1 (de) 1974-06-04 1975-12-04 Mitsubishi Heavy Ind Ltd Axialstroemungsgeblaese
US3951567A (en) 1971-12-18 1976-04-20 Ulrich Rohs Side channel compressor
US5342167A (en) 1992-10-09 1994-08-30 Airflow Research And Manufacturing Corporation Low noise fan
US5681145A (en) 1996-10-30 1997-10-28 Itt Automotive Electrical Systems, Inc. Low-noise, high-efficiency fan assembly combining unequal blade spacing angles and unequal blade setting angles
EP0921274A2 (fr) 1997-12-03 1999-06-09 United Technologies Corporation Amortisation aerodynamique des vibrations dans un étage rotorique d'une turbomachine
US20020127109A1 (en) 2001-03-09 2002-09-12 Minebea Co., Ltd. Axial flow fan motor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH470588A (de) * 1968-01-22 1969-03-31 Bbc Brown Boveri & Cie Geräuschminderung bei aerodynamischen Druckwellenmaschinen
BE792751A (fr) * 1971-12-18 1973-03-30 Rohs Ulrich Compresseur a conduit lateral
DE3708336C2 (de) * 1987-03-14 1996-02-15 Bosch Gmbh Robert Laufrad zum Fördern eines Mediums
DE3808336C2 (de) 1988-03-12 1997-05-07 Steinbeis Stiftung Fuer Wirtsc Verfahren zur Bestimmung der Feinheit von Textilfasern, insbesondere Flachsfasern
DE3939957A1 (de) * 1989-12-02 1991-06-06 Webasto Ag Fahrzeugtechnik Seitenkanalgeblaese
FR2824597B1 (fr) * 2001-05-11 2004-04-02 Snecma Moteurs Reduction de vibrations dans une structure comprenant un rotor et des sources de perturbation fixes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951567A (en) 1971-12-18 1976-04-20 Ulrich Rohs Side channel compressor
DE2524555A1 (de) 1974-06-04 1975-12-04 Mitsubishi Heavy Ind Ltd Axialstroemungsgeblaese
US5342167A (en) 1992-10-09 1994-08-30 Airflow Research And Manufacturing Corporation Low noise fan
US5681145A (en) 1996-10-30 1997-10-28 Itt Automotive Electrical Systems, Inc. Low-noise, high-efficiency fan assembly combining unequal blade spacing angles and unequal blade setting angles
EP0921274A2 (fr) 1997-12-03 1999-06-09 United Technologies Corporation Amortisation aerodynamique des vibrations dans un étage rotorique d'une turbomachine
US20020127109A1 (en) 2001-03-09 2002-09-12 Minebea Co., Ltd. Axial flow fan motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3020416A1 (fr) * 2014-04-29 2015-10-30 Peugeot Citroen Automobiles Sa Ventilateur pour machine electrique tournante de vehicule automobile
WO2015166150A1 (fr) 2014-04-29 2015-11-05 Peugeot Citroen Automobiles Sa Ventilateur pour machine electrique tournante de vehicule automobile

Also Published As

Publication number Publication date
US7651316B2 (en) 2010-01-26
EP1555440B1 (fr) 2009-03-04
EP1555440A3 (fr) 2005-11-30
US20050175483A1 (en) 2005-08-11
DE502004009082D1 (de) 2009-04-16
DE102004001845A1 (de) 2005-08-04

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