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US20020154995A1 - Blower - Google Patents

Blower Download PDF

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Publication number
US20020154995A1
US20020154995A1 US10/111,462 US11146202A US2002154995A1 US 20020154995 A1 US20020154995 A1 US 20020154995A1 US 11146202 A US11146202 A US 11146202A US 2002154995 A1 US2002154995 A1 US 2002154995A1
Authority
US
United States
Prior art keywords
gas delivery
delivery means
blower according
balancing masses
torque
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.)
Abandoned
Application number
US10/111,462
Other languages
English (en)
Inventor
Wolfgang Kehrer
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.)
Robert Bosch GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KEHRER, WOLFGANG
Publication of US20020154995A1 publication Critical patent/US20020154995A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F04D29/662—Balancing of rotors

Definitions

  • the invention is based on a blower according to the preamble of claim 1.
  • blowers forming the generic class are known and are used for cooling, heating, or ventilation.
  • Ventilators, fan wheels, or turbines are used as rotatable gas delivery means.
  • fan wheels are used in engine radiator blowers.
  • Disturbing noises are produced by internal combustion engine radiator blowers as a result of first-order excitation of vibrations that are transmitted into a passenger compartment as air-borne or structure-borne noise, and impair driving smoothness.
  • these noises are kept to a minimum by means of single-plane balancing of the fully-assembled internal combustion engine radiator blower, i.e., by balancing the static imbalance.
  • the static imbalance is thereby balanced manually using balancing clamps.
  • the invention is based on a blower having a rotatable gas delivery means.
  • the gas delivery means comprises a mass distribution that generates a predefined torque perpendicular to the axis of rotation when the gas delivery means rotates. If torque in the center of gravity acts upon the gas delivery means perpendicular to the axis of rotation, the gas delivery means is tilted downward within the scope of its bearing clearance. This can prevent the gas delivery means from moving freely within the bearing clearance and thrashing back and forth between the end positions of the bearing. A bracing of the gas delivery means can be achieved, and noise emitted by the gas delivery means can be reduced.
  • torque is effected by at least two balancing masses located in offset positions in the circumferential direction, one of which is located before and the other of which is located after a center of gravity of the gas delivery means in the axial direction.
  • Torque can be achieved using a particularly simple design and in cost-effective fashion.
  • two axially separated balancing masses are situated offset by 180° in relation to each other, which allows the balancing masses to be designed the same. If balancing masses are of equal size and their radial distance from the axis of rotation is the same, the gas delivery means is balanced in the plane perpendicular to its axis of rotation, with the exception of imbalance resulting from production tolerances.
  • the torque components of the individual balancing masses not only add up vectorially, but, with this geometry, according to their percentage as well.
  • the balancing masses are preferably arranged on a central fixture of vanes of the gas delivery means.
  • the balancing masses can be separated by a wide axial distance. Sufficiently high torque can be easily effected.
  • the gas delivery means is particularly stable on this central fixture of vanes. Disturbing twisting of the gas delivery means resulting from force acting on the balancing masses can be prevented.
  • the attachment site on a central fixture of vanes is particularly favorable in terms of aerodynamics.
  • the balancing masses are located on the gas delivery means in moveable fashion, in the axial direction in particular.
  • the balancing masses could also be designed to be moveable in the radial and/or circumferential direction.
  • torque can be adjusting throughout the life of the blower. Depending on its state of wear, the blower can always be adjusted so that noise is minimized.
  • the mass distribution that effects torque can also be advantageously integrated on the gas delivery means, however.
  • the gas delivery means is designed as a fan wheel.
  • Fan wheels are preferred over ventilators because they produce a uniform air flow, and their design is simple compared to that of turbines.
  • the means of attaining the solution according to the invention can be used in numerous different blowers appearing reasonable to one skilled in the art.
  • the means of attaining the solution is suited particularly advantageously for use with a blower for an internal combustion engine radiator, which, as a rule, produces a great deal of structure-borne noise.
  • FIG. 1 shows a front view of a fan wheel of an internal combustion engine radiator blower having two balancing masses located on the fan wheel hub,
  • FIG. 2 shows a view along the line II-II in FIG. 1, and
  • FIG. 3 shows a schematic diagram of the arrangement of balancing masses in a plane containing the fan wheel axis.
  • FIG. 1 shows a gas delivery means in the form of a fan wheel 10 of an internal combustion engine radiator blower. Seven vanes 14 are located on a central wheel hub 12 . The vanes 14 are connected by a ring 16 on their radially outer ends. Due to their shape, the seven vanes 14 generate a uniform air flow through a radiator (not shown) of an internal combustion engine of a motor vehicle.
  • Two balancing masses 20 , 22 are located on a cylinder jacket surface 18 of the wheel hub 12 . Viewed in the axial direction, the balancing masses 20 , 22 are located diametrically opposed, or offset 180° in relation to each other in the circumferential direction. As a result of this, the fan wheel 10 is balanced in a plane perpendicular to its axis of rotation 26 , with the exception of imbalance due to production tolerances. That is, the center of gravity 24 of the fan wheel 10 lies on its axis. This prevents the fan wheel 10 from thrashing back and forth in the radial direction during rotation.
  • One balancing mass 20 is located before and one balancing mass 22 is located after the center of gravity 24 of the gas delivery means 10 in the axial direction (FIG. 2).
  • the torque is situated perpendicular to the axis of rotation 26 of the fan wheel 10 .
  • the fan wheel 10 tilts downward slightly within its bearing clearance.
  • the bearing of the fan wheel 10 is therefore always under preload during a rotational motion. Noise emitted from the fan wheel 10 is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US10/111,462 2000-09-08 2001-06-12 Blower Abandoned US20020154995A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10044484A DE10044484A1 (de) 2000-09-08 2000-09-08 Gebläse
DE10044484.9 2000-09-08

Publications (1)

Publication Number Publication Date
US20020154995A1 true US20020154995A1 (en) 2002-10-24

Family

ID=7655533

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/111,462 Abandoned US20020154995A1 (en) 2000-09-08 2001-06-12 Blower

Country Status (5)

Country Link
US (1) US20020154995A1 (de)
EP (1) EP1317629A1 (de)
KR (1) KR20020062639A (de)
DE (1) DE10044484A1 (de)
WO (1) WO2002020995A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009003056A1 (de) * 2009-05-13 2010-11-18 Robert Bosch Gmbh Verstelleinrichtung für einen Rotationskörper, sowie Rotationskörper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336697A (en) * 1940-10-03 1943-12-14 Knapp Monarch Co Fan balancing means
US3733923A (en) * 1971-08-30 1973-05-22 E Goodrich Economical automatic balancer for rotating masses
US4107257A (en) * 1975-09-24 1978-08-15 Swin Sr Richard E Method for molding dynamically balanced fans
US4644201A (en) * 1984-07-13 1987-02-17 Hitachi, Ltd. Armature for direct current motor with imbalance correction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125800A (ja) * 1983-12-08 1985-07-05 Matsushita Electric Ind Co Ltd 電動送風機
DE29615144U1 (de) * 1996-08-30 1998-01-02 Robert Bosch Gmbh, 70469 Stuttgart Radiallüfter
ITTO980490A1 (it) * 1998-06-05 1999-12-05 Magneti Marelli Climat Srl Procedimento per l'assemblaggio di un elettroventilatore.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336697A (en) * 1940-10-03 1943-12-14 Knapp Monarch Co Fan balancing means
US3733923A (en) * 1971-08-30 1973-05-22 E Goodrich Economical automatic balancer for rotating masses
US4107257A (en) * 1975-09-24 1978-08-15 Swin Sr Richard E Method for molding dynamically balanced fans
US4644201A (en) * 1984-07-13 1987-02-17 Hitachi, Ltd. Armature for direct current motor with imbalance correction

Also Published As

Publication number Publication date
WO2002020995A1 (de) 2002-03-14
DE10044484A1 (de) 2002-03-21
EP1317629A1 (de) 2003-06-11
KR20020062639A (ko) 2002-07-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KEHRER, WOLFGANG;REEL/FRAME:013092/0770

Effective date: 20020327

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE