EP0339408B1 - Radial fan - Google Patents

Radial fan Download PDF

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Publication number
EP0339408B1
EP0339408B1 EP89106780A EP89106780A EP0339408B1 EP 0339408 B1 EP0339408 B1 EP 0339408B1 EP 89106780 A EP89106780 A EP 89106780A EP 89106780 A EP89106780 A EP 89106780A EP 0339408 B1 EP0339408 B1 EP 0339408B1
Authority
EP
European Patent Office
Prior art keywords
bearing
housing
blower
motor
motor armature
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.)
Expired - Lifetime
Application number
EP89106780A
Other languages
German (de)
French (fr)
Other versions
EP0339408A3 (en
EP0339408A2 (en
Inventor
Frank Fleischmann
Hans-Peter Dr. Kabelitz
Winfried Kaiser
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.)
Balzers und Leybold Deutschland Holding AG
Original Assignee
Leybold AG
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 Leybold AG filed Critical Leybold AG
Publication of EP0339408A2 publication Critical patent/EP0339408A2/en
Publication of EP0339408A3 publication Critical patent/EP0339408A3/en
Application granted granted Critical
Publication of EP0339408B1 publication Critical patent/EP0339408B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/059—Roller bearings
    • 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
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans
    • 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

  • the invention relates to turbo radial fans with a motor housing and a rotating unit mounted in this housing, consisting of a shaft, a fan rotor and a motor armature, a first roller bearing between the fan rotor and motor armature and a second roller bearing in the region of the end of the shaft facing away from the fan rotor are provided and the roller bearings in the housing are assigned elastically supported bearing supports, the outer bearing ring of the second roller bearing being supported in the sleeve-shaped bearing support via an elastic support in the axial direction.
  • a blower of this type is known from EP-A 235 392.
  • the assembly and disassembly of such a blower is obviously difficult, so that the replacement of wearing parts is complex and requires long interruptions in operating time.
  • the balancing process can only be carried out after the rotating unit has been installed in the housing.
  • the elastic mounting of the bearings in the housing make it difficult to identify the position of unbalances.
  • this object is achieved in that the rotating unit consisting of the blower rotor, shaft and motor armature can be assembled and disassembled together with the bearing supports and the elastic support in the form of a coil spring as a whole in the motor housing and in that the outer diameter of the support of the first bearing is larger than the outer diameter of the motor armature and support of the second bearing and that the diameter of the support of the second bearing is equal to or preferably less than the diameter of the motor armature.
  • the rotating unit can be removed as a whole from the fan housing in a fully functional form after the flow housing has been detached. The replacement of wearing parts that may be necessary during maintenance and repair work is particularly easy.
  • the entire rotating unit can be replaced, for example. It is advantageous that the rotating unit can be balanced independently of the motor housing, and that much more precisely. When installed, elastic bearing suspensions are absolutely necessary, which complicate the balancing process. The balancing process of a removed rotating unit can be carried out without elastic bearing suspension.
  • Another advantage of the invention is that the bearing brackets - in particular the disk-shaped bearing brackets associated with the first bearing - allow more precise guidance of the bearings in the motor housing due to their relatively large diameter.
  • the figure shows a turbo radial blower 1 with a flow housing 2 and a motor housing 3.
  • the flow housing comprises the gas inlet 4, the wall 6 delimiting the flow channel 5, the diffuser 7 and the collecting channel 8 with the outlets 9.
  • the rotating unit held in the motor housing 3 consists from the fan rotor 11, the shaft 12 and the motor armature 13.
  • Rolling bearings 14 and 15 are provided for mounting the shaft 12, one of which (14) is arranged between the fan rotor 11 and the motor armature 13, while the second bearing 15 is located in the region of the free end of the shaft 12 facing away from the fan rotor 11.
  • Bearing supports 16 and 17 are provided for holding the roller bearings 14 and 15 in the bearing housing 3.
  • the bearing bracket 16 associated with the rolling bearing 14 has the shape of a disk with a relatively large diameter. It is elastically supported in the housing 3 via the O-ring 18.
  • the bearing support 17 assigned to the rolling bearing 15 has the shape of a sleeve which is supported elastically in the bearing housing 3 via the O-rings 21 and 22.
  • the outer bearing ring of the rolling bearing 15 is supported by a helical spring 23, so that thermal longitudinal expansions of the shaft 12 are possible.
  • the motor and storage space of the motor housing 3 is closed on the side of the fan rotor with a flange-like cover 24 which is screwed to the motor housing 3 by means of screw connections 25 arranged on the side of the fan rotor 11.
  • the motor housing itself is equipped with a flange 26, which in turn is detachably connected to the flow housing 2 via screw connections 27 that are accessible from the outside.
  • the outer diameter of the disk-shaped bearing bracket 16 is larger than the diameter of the motor armature 13, and its diameter is in turn larger than the outer diameter of the sleeve-shaped bearing bracket 17. Because of these dimensions, it is possible after the separation of the flow housing 2 and motor housing 3 and after Removing the cover 24 and taking the rotating unit (blower rotor 11, shaft 12, motor armature 13) out of the motor housing 3 as a whole. This makes it particularly easy to replace the rotating unit. It is essential that the rotating unit can be completely balanced outside of the bearing housing 3. It is not necessary to make the rotating unit resilient in the balancing machine. When installed, this elastic suspension is absolutely necessary so that completely vibration-free storage is possible.

Description

Die Erfindung bezieht sich auf Turboradialgebläse mit einem Motorgehäuse und einer in diesem Gehäuse gelagerten, rotierenden Einheit, bestehend aus einer Welle, einem Gebläserotor und einem Motoranker, wobei ein erstes Wälzlager zwischen Gebläserotor und Motoranker und zweites Wälzlager im Bereich des dem Gebläserotor abgewandten Endes der Welle vorgesehen sind und den Wälzlagern im Gehäuse elastisch gehalterte Lagerträger zugeordnet sind, wobei sich der äußere Lagerring des zweiten Wälzlagers über eine elastische Abstützung in axialer richtung im hülsenförmigen Lagerträger abstützt.The invention relates to turbo radial fans with a motor housing and a rotating unit mounted in this housing, consisting of a shaft, a fan rotor and a motor armature, a first roller bearing between the fan rotor and motor armature and a second roller bearing in the region of the end of the shaft facing away from the fan rotor are provided and the roller bearings in the housing are assigned elastically supported bearing supports, the outer bearing ring of the second roller bearing being supported in the sleeve-shaped bearing support via an elastic support in the axial direction.

Aus der EP-A 235 392 ist ein Gebläse dieser Art bekannt. Die Montage und Demontage eines derartigen Gebläses ist offensichtlich schwierig, so daß das Auswechseln von Verschleißteilen aufwendig ist und lange Unterbrechungen der Betriebszeit erfordert. Der Auswuchtvorgang kann erst nach dem Einbau der rotierenden Einheit in das Gehäuse vorgenommen werden. Die elastische Halterung der Lagerungen im Gehäuse erschweren dabei das Erkennen der Lage von Unwuchten.A blower of this type is known from EP-A 235 392. The assembly and disassembly of such a blower is obviously difficult, so that the replacement of wearing parts is complex and requires long interruptions in operating time. The balancing process can only be carried out after the rotating unit has been installed in the housing. The elastic mounting of the bearings in the housing make it difficult to identify the position of unbalances.

Aus dem Abstract zur japanischen Patentanmeldung 56-98352 (October 30, 1981, Vol. 5, Number 171) ist ein Verfahren zur Herstellung einer rotierenden elektrischen Maschine bekannt, deren Welle mit Gleitlagern ausgerüstet ist. Diese Lager stützen sich auf separate Lagerträger ab, die vor der Montage des rotierenden Systems montiert und justiert werden, so daß die anschließende Montage der Welle ohne langwierige Justierarbeiten möglich ist. Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Gebläse der eingangs genannten Art zu schaffen, bei dem Montage, Demontage und vor allem der Auswuchtvorgang einfacher und genauer durchführbar sind.From the abstract for Japanese patent application 56-98352 (October 30, 1981, Vol. 5, Number 171), a method for producing a rotating electrical machine is known, the shaft of which is equipped with slide bearings. These camps are based separate bearing brackets, which are assembled and adjusted before assembly of the rotating system, so that the subsequent assembly of the shaft is possible without lengthy adjustment work. The present invention has for its object to provide a blower of the type mentioned in the assembly, disassembly and especially the balancing process can be carried out more easily and accurately.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die aus Gebläserotor, Welle und Motoranker bestehende rotierende Einheit gemeinsam mit den Lagerträgern sowie der elastischen Abstützung in Form einer Schraubenfeder als Ganzes im Motorgehäuse montierbar und demontierbar sind und daß der äußere Durchmesser des Trägers des ersten Lagers größer ist als die äußeren Durchmesser von Motoranker und Träger des zweiten Lagers und daß der Durchmesser des Trägers des zweiten Lagers gleich oder vorzugsweise kleiner als der Durchmesser des Motorankers ist. Bei einem in dieser Weise ausgebildeten Turboradialgebläse ist - nach dem Ablösen des Strömungsgehäuses - die rotierende Einheit in voll funktionsfähiger Form als Ganzes aus dem Gebläsegehäuse herausnehmbar. Der bei Wartungs- und reparaturarbeiten eventuell notwendige Austausch von Verschleißteilen ist dadurch besonders einfach. Um die Unterbrechungen der Betriebszeit kurz zu halten, kann beispielsweise die rotierende Einheit als Ganzes ausgetauscht werden. Dabei ist es von Vorteil, daß die rotierende Einheit unabhängig vom Motorgehäuse ausgewuchtet werden kann, und zwar wesentlich genauer. Im eingebauten Zustand sind elastische Lageraufhängungen unbedingt erforderlich, welche den Wuchtvorgang erschweren. Der Wuchtvorgang einer ausgebauten rotierenden Einheit kann ohne elastische Lageraufhängung vorgenommen werden. Ein weiterer Vorteil der Erfindung besteht darin, daß die Lagerträger - insbesondere der dem ersten Lager zugeordnete, scheibenförmige Lagerträger - infolge ihres relativ großen Durchmessers eine genauere Führung der Lager im Motorgehäuse ermöglichen.According to the invention this object is achieved in that the rotating unit consisting of the blower rotor, shaft and motor armature can be assembled and disassembled together with the bearing supports and the elastic support in the form of a coil spring as a whole in the motor housing and in that the outer diameter of the support of the first bearing is larger than the outer diameter of the motor armature and support of the second bearing and that the diameter of the support of the second bearing is equal to or preferably less than the diameter of the motor armature. In a turbo radial fan designed in this way, the rotating unit can be removed as a whole from the fan housing in a fully functional form after the flow housing has been detached. The replacement of wearing parts that may be necessary during maintenance and repair work is particularly easy. In order to keep the interruptions in the operating time short, the entire rotating unit can be replaced, for example. It is advantageous that the rotating unit can be balanced independently of the motor housing, and that much more precisely. When installed, elastic bearing suspensions are absolutely necessary, which complicate the balancing process. The balancing process of a removed rotating unit can be carried out without elastic bearing suspension. Another advantage of the invention is that the bearing brackets - in particular the disk-shaped bearing brackets associated with the first bearing - allow more precise guidance of the bearings in the motor housing due to their relatively large diameter.

Weitere Vorteile und Einzelheiten der Erfindung sollen anhand eines in der Figur dargestellten Ausführungsbeispieles erläutert werden.Further advantages and details of the invention will be explained with reference to an embodiment shown in the figure.

Die Figur zeigt ein Turboradialgebläse 1 mit einem Strömungsgehäuse 2 und einem Motorgehäuse 3. Das Strömungsgehäuse umfaßt den Gaseintritt 4, die den Strömungskanal 5 begrenzende Wandung 6, den Diffusor 7 sowie den Sammelkanal 8 mit den Austritten 9. Die im Motorgehäuse 3 gehalterte rotierende Einheit besteht aus dem Gebläserotor 11, der Welle 12 und dem Motoranker 13.The figure shows a turbo radial blower 1 with a flow housing 2 and a motor housing 3. The flow housing comprises the gas inlet 4, the wall 6 delimiting the flow channel 5, the diffuser 7 and the collecting channel 8 with the outlets 9. The rotating unit held in the motor housing 3 consists from the fan rotor 11, the shaft 12 and the motor armature 13.

Zur Lagerung der Welle 12 sind Wälzlager 14 und 15 vorgesehen, von denen eines (14) zwischen Gebläserotor 11 und Motoranker 13 angeordnet ist, während sich das zweite Lager 15 im Bereich des dem Gebläserotor 11 abgewandten freien Endes der Welle 12 befindet. Zur Halterung der Wälzlager 14 und 15 im Lagergehäuse 3 sind Lagerträger 16 und 17 vorgesehen. Der dem Wälzlager 14 zugeordnete Lagerträger 16 hat die Form einer Scheibe mit relativ großem Durchmesser. Über den O-Ring 18 stützt sie sich im Gehäuse 3 elastisch ab. Der dem Wälzlager 15 zugeordnete Lagerträger 17 hat die Form einer Hülse, die sich über die O-Ringe 21 und 22 im Lagergehäuse 3 elastisch abstützen. Im hülsenförmigen Lagerträger 17 stützt sich der äußere Lagerring des Wälzlagers 15 über eine Schraubenfeder 23 ab, so daß thermische Längsdehnungen der Welle 12 möglich sind. Der Motor- und Lagerraum des Motorgehäuses 3 ist auf der Seite des Gebläserotors mit einem flanschartigen Deckel 24 verschlossen, der mittels seitlich des Gebläserotors 11 angeordneten Verschraubungen 25 mit dem Motorgehäuse 3 verschraubt ist. Das Motorgehäuse selbst ist mit einem Flansch 26 ausgerüstet, der seinerseits mit dem Strömungsgehäuse 2 über von außen zugängliche Verschraubungen 27 lösbar verbunden ist.Rolling bearings 14 and 15 are provided for mounting the shaft 12, one of which (14) is arranged between the fan rotor 11 and the motor armature 13, while the second bearing 15 is located in the region of the free end of the shaft 12 facing away from the fan rotor 11. Bearing supports 16 and 17 are provided for holding the roller bearings 14 and 15 in the bearing housing 3. The bearing bracket 16 associated with the rolling bearing 14 has the shape of a disk with a relatively large diameter. It is elastically supported in the housing 3 via the O-ring 18. The bearing support 17 assigned to the rolling bearing 15 has the shape of a sleeve which is supported elastically in the bearing housing 3 via the O-rings 21 and 22. In the sleeve-shaped bearing bracket 17, the outer bearing ring of the rolling bearing 15 is supported by a helical spring 23, so that thermal longitudinal expansions of the shaft 12 are possible. The motor and storage space of the motor housing 3 is closed on the side of the fan rotor with a flange-like cover 24 which is screwed to the motor housing 3 by means of screw connections 25 arranged on the side of the fan rotor 11. The motor housing itself is equipped with a flange 26, which in turn is detachably connected to the flow housing 2 via screw connections 27 that are accessible from the outside.

Der äußere Durchmesser des scheibenförmigen Lagerträgers 16 ist größer als der Durchmesser des Motorankers 13, und dessen Durchmesser ist wiederum größer als der äußere Durchmesser des hülsenförmigen Lagerträgers 17. Aufgrund dieser Abmessungen ist es möglich, nach der Trennung von Strömungsgehäuse 2 und Motorgehäuse 3 und nach dem Abnehmen des Deckels 24 die rotierende Einheit (Gebläserotor 11, Welle 12, Motoranker 13) als Ganzes aus dem Motorgehäuse 3 herauszunehmen. Das Auswechseln der rotierenden Einheit ist dadurch besonders einfach. Wesentlich ist, daß die rotierende Einheit vollständig außerhalb des Lagergehäuses 3 ausgewuchtet werden kann. Dabei ist es nicht erforderlich, die Aufhängung der rotierenden Einheit in der Wuchtmaschine elastisch vorzunehmen. Im eingebauten Zustand ist diese elastische Aufhängung unbedingt erforderlich, damit eine völlig vibrationsfreie Lagerung möglich ist.The outer diameter of the disk-shaped bearing bracket 16 is larger than the diameter of the motor armature 13, and its diameter is in turn larger than the outer diameter of the sleeve-shaped bearing bracket 17. Because of these dimensions, it is possible after the separation of the flow housing 2 and motor housing 3 and after Removing the cover 24 and taking the rotating unit (blower rotor 11, shaft 12, motor armature 13) out of the motor housing 3 as a whole. This makes it particularly easy to replace the rotating unit. It is essential that the rotating unit can be completely balanced outside of the bearing housing 3. It is not necessary to make the rotating unit resilient in the balancing machine. When installed, this elastic suspension is absolutely necessary so that completely vibration-free storage is possible.

Claims (3)

1. Radial turbo-blower (1) with a motor housing (3) and a rotating unit which is mounted in this housing and consists of a shaft (12), a blower rotor (11) and a motor armature (13), a first rolling bearing (14) being provided between the blower rotor (11) and the motor armature (13), a second rolling bearing (15) being provided in the area of the end of the shaft which is distant from the blower rotor, resiliently held bearing supports (16, 17) being associated with the rolling bearings (14, 15) in the bearing housing (3), and the outer bearing race of the second rolling bearing (15) being supported in the axial direction in the sleeve-shaped bearing support (17) via a resilient carrier, characterised in that the rotating unit, which consists of the blower rotor (11), the shaft (12) and the motor armature (13), can be mounted and dismounted as a whole in the motor housing (3) together with the bearing supports (16, 17) and the resilient carrier in the form of a helical spring (23), that the external diameter of the bearing support (16) of the first bearing (14) is greater than the external diameters of the motor armature (13) and the bearing support (17) of the second bearing (15), and that the diameter of the bearing support (17) of the second bearing (15) is smaller than or equal to the diameter of the motor armature (13).
2. Radial turbo-blower according to claim 1, characterised in that the bearing support (16) of the first bearing (14) is disc-shaped and is supported in the bearing housing (3) via the O-ring (18).
3. Radial turbo-blower according to claim 1 or 2, characterised in that the bearing support (17) of the second bearing (15) is sleeve-shaped and is supported in the bearing housing (3) via two O-rings (21, 22).
EP89106780A 1988-04-27 1989-04-15 Radial fan Expired - Lifetime EP0339408B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3814130 1988-04-27
DE3814130A DE3814130A1 (en) 1988-04-27 1988-04-27 TURBORADIAL BLOWER

Publications (3)

Publication Number Publication Date
EP0339408A2 EP0339408A2 (en) 1989-11-02
EP0339408A3 EP0339408A3 (en) 1990-01-10
EP0339408B1 true EP0339408B1 (en) 1992-04-15

Family

ID=6352942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106780A Expired - Lifetime EP0339408B1 (en) 1988-04-27 1989-04-15 Radial fan

Country Status (5)

Country Link
US (1) US4963076A (en)
EP (1) EP0339408B1 (en)
JP (1) JP2750375B2 (en)
DE (2) DE3814130A1 (en)
ES (1) ES2031300T3 (en)

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Also Published As

Publication number Publication date
DE3814130A1 (en) 1989-11-09
US4963076A (en) 1990-10-16
ES2031300T3 (en) 1992-12-01
JP2750375B2 (en) 1998-05-13
EP0339408A3 (en) 1990-01-10
JPH01305199A (en) 1989-12-08
DE58901136D1 (en) 1992-05-21
EP0339408A2 (en) 1989-11-02

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