EP0596837A2 - Ein baryzentrisches Lager für das Ausgleichen einer Motor-Rotoreinheit auf einem Kessel mit hermetischen Druckbrennkammern - Google Patents

Ein baryzentrisches Lager für das Ausgleichen einer Motor-Rotoreinheit auf einem Kessel mit hermetischen Druckbrennkammern Download PDF

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Publication number
EP0596837A2
EP0596837A2 EP93830416A EP93830416A EP0596837A2 EP 0596837 A2 EP0596837 A2 EP 0596837A2 EP 93830416 A EP93830416 A EP 93830416A EP 93830416 A EP93830416 A EP 93830416A EP 0596837 A2 EP0596837 A2 EP 0596837A2
Authority
EP
European Patent Office
Prior art keywords
motor
rotor unit
support
balancing
barycentric
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Withdrawn
Application number
EP93830416A
Other languages
English (en)
French (fr)
Other versions
EP0596837A3 (en
Inventor
Alberto Bacchiocchi
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.)
Fime - Fabbrica Italiana Motori Elettrici - Srl
Original Assignee
Fime - Fabbrica Italiana Motori Elettrici - Srl
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 Fime - Fabbrica Italiana Motori Elettrici - Srl filed Critical Fime - Fabbrica Italiana Motori Elettrici - Srl
Publication of EP0596837A2 publication Critical patent/EP0596837A2/de
Publication of EP0596837A3 publication Critical patent/EP0596837A3/en
Withdrawn legal-status Critical Current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
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations

Definitions

  • This patent application concerns a barycentric support for balancing the motor-rotor unit on airtight combustion chamber boilers employed in heating systems.
  • These boilers generally have a centrifugal fan which on one hand ensures an intake of comburent air and, on the other, permits the forced discharge of combustion smoke.
  • the screw housing of the rotor is generally fixed to the supporting framework of the boiler, while the motor-rotor unit is screwed to the exterior of the rear wall of the screw by means of a number of interposed shock absorbing rubber collars which prevent the vibrations of the unit from being fully transmitted to the screw and by this to the boiler body, thereby producing unwanted noisiness.
  • said rubber collars are fitted between the screw and the front support U-bolt of the motor-rotor unit, namely the one facing the fan and immediately opposite the rear wall of the screw.
  • This device consists of a supporting shelf screwed to the exterior of the rear wall of the screw below the motor-rotor unit; it should be noted that once the motor-rotor unit has been installed its shaft is positioned horizontally; this means that the rear wall of the screw lies on a vertical plane, as does the front support plate-shaped U-bolt of the motor-rotor unit, while the axes of the above shock-absorbing collars are parallel to the horizontal axis of the rotor shaft.
  • Said shelf supports a rubber cylinder having a vertical axis which is wedged between said shelf and the edge of the overlying plate-shaped U-bolt, thrusting the latter upwards in order to balance, be it very approximately, the weight of the motor-rotor unit consisting of the shaft, the fan, the motor and relevant rear and front support U-bolts.
  • Said balancing device can not be considered as totally satisfactory in that even though the system of forces consisting of the motor-rotor unit weight and the external balancing thrust (provided by the rubber cylinder compressed between the U-bolt and the shelf) allows a resulting force which is practically zero, the resulting moment of this system of forces is not zero, in that the external balancing thrust is applied along a vertical straight line which does not pass through the barycentre of the motor-rotor unit.
  • the purpose of this invention is to design a balancing device which provides complete and precise static balancing of motor-rotor units installed on boilers with airtight combustion chamber.
  • the device in question consists of a rubber collar which, thanks to an adjusting screw, can be thrust, with the required force, either against the bottom wall of the stator unit at a point aligned vertically with the overlying barycentre of the motor-rotor unit.
  • the above rubber collar is thrust under a projecting tab, towards the back, from the bottom edge of the above front support U-bolt of the motor-rotor unit, instead of directly pinning down the stator unit; the use of said tab permits discharging the balancing force on the U-bolt, while applying it at a point aligned vertically with respect to the barycentre of the motor-rotor unit, notwithstanding the fact that the U-bolt is positioned further forwards with respect to the barycentric vertical direction.
  • the collar resting on a support shelf fixed to the screw, abuts from under a bracket fitted on the top edge of the above front support U-bolt of the motor-rotor unit which is consequently suspended from said collar at a point aligned vertically to the barycentre of said unit.
  • the device in question includes a rubber collar (1) having a vertical axis, supported by an annular plate (2) fixed along the shank of a screw (3) having a vertical axis, projecting from the end of a support shelf (4) on which said screw (3) may be fixed in the positioned required by means of a nut (5) and lock nut (6).
  • Said support shelf (4) is screwed on the rear wall (7) of the screw (7a), to which the front support U-bolt (8) of the motor-rotor unit (9) is screwed.
  • said U-bolt (8) is shaped like a three-lobe plate, staggered by 120°, where the U-bolt is screwed to the screw (7a) with interposing rubber collars (10) which act as shock absorbers.
  • the characteristic of the device according to the invention is that the collar (1) no longer presses on the bottom edge of the U-bolt (8) as in the past, but under the stator unit (11) at a point along the vertical straight line passing through the barycentre of the motor-rotor unit.
  • the shelf (4) features a slot (4a) which permits regulating the end position of the collar (1) with respect to the shelf (4) in order to ensure a perfect alignment of the collar (1) with respect to the barycentre of the motor-rotor unit, from time to time.
  • the collar (1) in a alternative structural embodiment, presses under a bracket (8a) projecting from the U-bolt (8), by means of which the balancing thrust of the collar (1) pushes against the U-bolt instead of on the stator unit (11), as in the embodiment referred to in figs. 1 and 2.
  • Fig. 4 illustrates a third structural embodiment whereby the U-bolt (8) features on its top edges a bracket (8b) on which the upward thrust of the collar (1) is exerted, and whose support shelf (4) is in this case fixed at the top of the rear wall of the screw (7a), above the motor-rotor unit.
  • brackets (8a and 8b) ensure that the balancing force exerted by the collar (1) on the U-bolt (8) by means of the brackets (8a and 8b) lie in a vertical direction passing through the barycentre of the motor-rotor unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Frames (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP19930830416 1992-10-28 1993-10-14 A barycentric support for balancing the motor-rotor unit on airtight combustion chamber boilers. Withdrawn EP0596837A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT92AN000039A IT1265782B1 (it) 1992-10-28 1992-10-28 Supporto baricentrico per l'equilibratura del gruppo motore-girante installato sulle caldaie a camera di combustione stagna
ITAN920039 1992-10-28

Publications (2)

Publication Number Publication Date
EP0596837A2 true EP0596837A2 (de) 1994-05-11
EP0596837A3 EP0596837A3 (en) 1994-08-10

Family

ID=11333640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930830416 Withdrawn EP0596837A3 (en) 1992-10-28 1993-10-14 A barycentric support for balancing the motor-rotor unit on airtight combustion chamber boilers.

Country Status (2)

Country Link
EP (1) EP0596837A3 (de)
IT (1) IT1265782B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0800000A1 (de) * 1996-04-01 1997-10-08 Valeo Klimasysteme GmbH Gebläse einer Heizung - und/oder Klimaanlage
EP0924436A2 (de) * 1997-12-17 1999-06-23 L.N. di NATALINI LINO & C. - S.r.l. Lüftergehäuse
WO1999050082A1 (de) * 1998-03-28 1999-10-07 Robert Bosch Gmbh Entkopplungsvorrichtung für einen elektromotor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773285A (en) * 1972-02-18 1973-11-20 W Morrill Flexible machine mounting
GB1570751A (en) * 1976-08-12 1980-07-09 Tokai Rubber Ind Ltd Anti-vibration mounting
EP0236015A2 (de) * 1986-02-25 1987-09-09 Rank Taylor Hobson Limited Schwingungsisolierungsmittel
JPH0217240A (ja) * 1988-07-04 1990-01-22 Mitsui Constr Co Ltd 設備用防振架台の構造
US5020767A (en) * 1989-01-31 1991-06-04 Kabushiki Kaisha Toshiba Motor mounting structure for washing machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773285A (en) * 1972-02-18 1973-11-20 W Morrill Flexible machine mounting
GB1570751A (en) * 1976-08-12 1980-07-09 Tokai Rubber Ind Ltd Anti-vibration mounting
EP0236015A2 (de) * 1986-02-25 1987-09-09 Rank Taylor Hobson Limited Schwingungsisolierungsmittel
JPH0217240A (ja) * 1988-07-04 1990-01-22 Mitsui Constr Co Ltd 設備用防振架台の構造
US5020767A (en) * 1989-01-31 1991-06-04 Kabushiki Kaisha Toshiba Motor mounting structure for washing machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 155 (M-0954) 26 March 1990 & JP-A-02 017 240 (YASUOKA HIROTO) 22 January 1990 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0800000A1 (de) * 1996-04-01 1997-10-08 Valeo Klimasysteme GmbH Gebläse einer Heizung - und/oder Klimaanlage
EP0924436A2 (de) * 1997-12-17 1999-06-23 L.N. di NATALINI LINO & C. - S.r.l. Lüftergehäuse
EP0924436A3 (de) * 1997-12-17 2000-02-23 L.N. di NATALINI LINO & C. - S.r.l. Lüftergehäuse
WO1999050082A1 (de) * 1998-03-28 1999-10-07 Robert Bosch Gmbh Entkopplungsvorrichtung für einen elektromotor
US6278209B1 (en) * 1998-03-28 2001-08-21 Robert Bosch Gmbh Decoupling device for an electric motor

Also Published As

Publication number Publication date
ITAN920039A1 (it) 1994-04-29
IT1265782B1 (it) 1996-12-02
ITAN920039A0 (it) 1992-10-28
EP0596837A3 (en) 1994-08-10

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