EP0575342A1 - Ventilateur radial - Google Patents

Ventilateur radial

Info

Publication number
EP0575342A1
EP0575342A1 EP19920903133 EP92903133A EP0575342A1 EP 0575342 A1 EP0575342 A1 EP 0575342A1 EP 19920903133 EP19920903133 EP 19920903133 EP 92903133 A EP92903133 A EP 92903133A EP 0575342 A1 EP0575342 A1 EP 0575342A1
Authority
EP
European Patent Office
Prior art keywords
bearings
shaft
rotor
radial fan
ceramic
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Withdrawn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
EP19920903133
Other languages
German (de)
English (en)
Inventor
Hans-Peter Kabelitz
Martin Mühlhoff
Hans-Günter STÜBER
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 EP0575342A1 publication Critical patent/EP0575342A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04D29/0566—Ceramic bearing designs
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially adapted for elastic fluid pumps

Definitions

  • the invention relates to a radial fan with a rotor, a drive motor, a rotor shaft and lubricant-supplied shaft bearings, the drive motor and the shaft bearings being accommodated in a housing which has a bushing for the shaft and a connection for evacuating the Housing interior is equipped.
  • Blowers of this type are preferably integrated in gas lasers and serve to circulate the gases flowing around them at a pressure of approximately 50-200 mbar.
  • a pressure of approximately 50-200 mbar there is a demand for long downtimes and short interruptions in the event of maintenance or repair work.
  • an oil circulation lubrication with oil sump and oil pump is provided as a lubricant supply for the shaft bearings.
  • Oil atomization takes place in the engine and storage space, both in the bearings and - because of the existing centrifugal disks - on the inner walls.
  • This risk is particularly high if the storage system is evacuated, if the oil atomization due to high speeds is particularly strong and if there is a negative pressure in the area of the rotor, as is the case, for example, with turbo radial fans which are used to circulate gases in gas lasers.
  • blower cannot be installed in a gas laser regardless of the position. It must always be ensured that the oil sump is at the lowest point.
  • the blower is therefore often integrated into the gas laser at locations which are difficult to access, which additionally increases the maintenance and repair times which are already relatively long because of the integration in the gas laser.
  • the present invention has for its object to provide a radial fan of the type mentioned, in which long service life and thus a significant reduction in maintenance can be achieved despite the lack of oil circulation lubrication.
  • this object is achieved in that the bearings of the rotor shaft are designed as ceramic bearings.
  • the bearing temperatures remain significantly lower. These bearings can therefore be lubricated with grease.
  • the cold welds feared in steel bearings and caused by inadequate lubrication no longer occur. These cause increased friction and sliding phenomena in steel bearings and thus increased bearing temperatures and increased bearing wear, which in use ceramic bearing materials is no longer the case.
  • a radial fan equipped with grease-lubricated ceramic bearing bearings can be installed regardless of the position. It can therefore be installed in locations that are convenient for both cooling and maintenance.
  • the bearings are designed as roller bearings with roller bodies and bearing rings and if only the roller bodies are made of ceramic. Since ceramic rolling elements are lighter than steel rolling elements, the centrifugal forces and thus the internal bearing stresses are lower, which has the desired influence on extending the bearing life.
  • the turbo radial blower 1 shown only partially in the figure has the motor and bearing housing 3.
  • the rotating unit held in this housing consists of the blower rotor 11, the shaft 12 and the armature of the motor 13.
  • rolling bearings 14 and 15 are provided, one of which (14) is arranged between the blower rotor 11 and the motor armature, 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.
  • the front end of the housing 3 form flange-like covers 16 and 17, so that the housing interior 18 is closed except for the shaft bushing 19 in the upper cover 16.
  • an evacuation line 21 is provided which connects the interior 18 of the housing 3 to a small flange 22 to which a vacuum pump is connected during the operation of the fan 1 is connected.
  • the bearings 14, 15 are designed as ceramic bearings, ie at least the rolling elements of these bearings - preferably balls - are made of ceramic material.
  • Grease-lubricated bearings of this type have a long service life, which can be extended by assigning grease storage spaces 23.
  • An installation part 24 comprising the shaft 12, which is assigned to the underside of the upper bearing 14 and contains the grease storage space 23, is shown and designated by 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rolling Contact Bearings (AREA)
  • Non-Positive Displacement Air Blowers (AREA)

Abstract

Soufflante radiale (1) comportant un rotor (11), un moteur de commande (13), un arbre de rotor (12), ainsi que des paliers d'arbre lubrifiés (14, 15), le moteur de commande (13) et les paliers d'arbre étant logés dans un carter (3) équipé d'un passage (19) pour l'arbre, ainsi que d'un raccordement (21, 22) pour l'évacuation de l'air de l'intérieur du carter (18); en particulier pour la prolongation de la durée de vie du dispositif, il est proposé de réaliser les paliers (14, 15) en céramique.
EP19920903133 1991-03-09 1992-01-31 Ventilateur radial Withdrawn EP0575342A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9102855U DE9102855U1 (de) 1991-03-09 1991-03-09 Radialgebläse
DE9102855U 1991-03-09

Publications (1)

Publication Number Publication Date
EP0575342A1 true EP0575342A1 (fr) 1993-12-29

Family

ID=6865093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920903133 Withdrawn EP0575342A1 (fr) 1991-03-09 1992-01-31 Ventilateur radial

Country Status (4)

Country Link
EP (1) EP0575342A1 (fr)
JP (1) JPH06505070A (fr)
DE (1) DE9102855U1 (fr)
WO (1) WO1992015789A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259711B (en) * 1991-09-20 1995-07-05 Nsk Ltd Rolling bearing
DE4304790A1 (de) * 1993-02-17 1994-08-18 Schlattl Werner Bavaria Tech Punktschweißzange sowie Lageranordnung für eine solche Schweißzange
RU2082023C1 (ru) * 1996-05-22 1997-06-20 Закрытое акционерное общество "Сейболт-Евразия" Микрокомпрессор
JP2002039091A (ja) * 2000-07-21 2002-02-06 Minebea Co Ltd 送風機
DE10325077A1 (de) * 2003-04-01 2004-10-14 General Motors Corp., Detroit Nach außen abgedichtete Pumpe für ein gasförmiges, eine Dampfphase enthaltendes Medium
JP5482520B2 (ja) * 2010-07-09 2014-05-07 株式会社Ｉｈｉ ターボ機械
WO2017057480A1 (fr) * 2015-10-02 2017-04-06 株式会社Ihi Compresseur centrifuge
JP7017240B2 (ja) * 2018-10-09 2022-02-08 有限会社スクロール技研 スクロール型圧縮機

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02222586A (ja) * 1989-02-23 1990-09-05 Fanuc Ltd レーザ用ターボブロア及びレーザ発振装置
DE3926577A1 (de) * 1989-08-11 1991-02-14 Leybold Ag Vakuumpumpe mit einem rotor und mit unter vakuum betriebenen rotorlagerungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9215789A1 *

Also Published As

Publication number Publication date
DE9102855U1 (de) 1991-06-20
WO1992015789A1 (fr) 1992-09-17
JPH06505070A (ja) 1994-06-09

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19930724

AK Designated contracting states

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Designated state(s): CH DE FR GB IT LI

17Q First examination report despatched

Effective date: 19940704

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19950117