EP1267082B1 - Lubricating system for regenerative vacuum pumps - Google Patents

Lubricating system for regenerative vacuum pumps Download PDF

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Publication number
EP1267082B1
EP1267082B1 EP02253949A EP02253949A EP1267082B1 EP 1267082 B1 EP1267082 B1 EP 1267082B1 EP 02253949 A EP02253949 A EP 02253949A EP 02253949 A EP02253949 A EP 02253949A EP 1267082 B1 EP1267082 B1 EP 1267082B1
Authority
EP
European Patent Office
Prior art keywords
axial bore
shaft
bearings
lubricating
radial holes
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.)
Revoked
Application number
EP02253949A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1267082A3 (en
EP1267082A2 (en
Inventor
Ian David Stones
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.)
Edwards Ltd
Original Assignee
BOC Group Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9916491&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1267082(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by BOC Group Ltd filed Critical BOC Group Ltd
Publication of EP1267082A2 publication Critical patent/EP1267082A2/en
Publication of EP1267082A3 publication Critical patent/EP1267082A3/en
Application granted granted Critical
Publication of EP1267082B1 publication Critical patent/EP1267082B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially 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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/168—Pumps specially adapted to produce a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00—Other rotary non-positive-displacement pumps
    • F04D23/008—Regenerative pumps

Definitions

  • This invention relates to vacuum pumps of the regenerative type or which incorporate a regenerative section and which incorporate a high speed rotatable vertical shaft supported by bearings at each end of the shaft, and in particular to lubricating systems for such bearings.
  • a rotor In vacuum pumps of the regenerative type, a rotor is mounted on a vertical shaft for rotation within a surrounding stator.
  • the shaft is supported by upper and lower bearings which require lubrication.
  • the shaft is provided with a central axial bore which communicates with radial holes in alignment with the upper and lower bearings for delivering a lubricating fluid to the bearings.
  • GB-A-923779 specifies a compressor with a rotary shaft having a conical extension extending into a shaft reservoir with lubricating oil, the said conical extension comprising a side hole for allowing the dissipation of gas or vapour separating from the oil and accumulating inside the pipe.
  • a vacuum pump is provided as specified in claim 1.
  • FIG. 1 illustrates a known compound vacuum pump comprising a regenerative section 1 and a molecular drag (Holweck) section 2.
  • the pump includes a casing 3 made from a number of different body parts bolted or otherwise fixed together and provided with relevant seals therebetween.
  • a vertical shaft 6 mounted within the casing 3 is a vertical shaft 6 supported by an upper bearing 4 and a lower bearing 5.
  • the shaft 6 is rotatable about its longitudinal axis and is driven by an electric motor 7 surrounding the shaft 6.
  • a rotor 9 Securely attached to the shaft for rotation therewith is a rotor 9.
  • An axial bore 8 extends along a substantial length of the shaft and communicates with radial oil holes 8' delivering lubricating fluid to the upper and lower bearings.
  • a lubricating fluid such as oil establishes its own taper in a straight axial bore providing a small ledge is available at the bottom (as shown) end of the axial bore.
  • the lower radial holes 12 in alignment with the lower bearing are formed in a tapered surface of the axial bore. This mechanical taper means that the lubricating fluid will continue to flow both out from the lower radial holes 12 and also past the holes 12 to the upper radial holes 14 to the upper bearings.
  • the ratio of lubricating fluid leaving the respective holes 12, 14 is dependent upon oil jet hole diameter, taper angle, hole height within the taper and taper diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP02253949A 2001-06-13 2002-06-06 Lubricating system for regenerative vacuum pumps Revoked EP1267082B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0114397 2001-06-13
GBGB0114397.3A GB0114397D0 (en) 2001-06-13 2001-06-13 Improved lubricating systems for regenerative vacuum pumps

Publications (3)

Publication Number Publication Date
EP1267082A2 EP1267082A2 (en) 2002-12-18
EP1267082A3 EP1267082A3 (en) 2003-10-15
EP1267082B1 true EP1267082B1 (en) 2006-10-18

Family

ID=9916491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02253949A Revoked EP1267082B1 (en) 2001-06-13 2002-06-06 Lubricating system for regenerative vacuum pumps

Country Status (6)

Country Link
US (2) US20030000772A1 (enExample)
EP (1) EP1267082B1 (enExample)
JP (1) JP2003042091A (enExample)
AT (1) ATE343067T1 (enExample)
DE (1) DE60215418T2 (enExample)
GB (1) GB0114397D0 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7546782B2 (en) * 2006-01-12 2009-06-16 Seakeeper, Inc. Cooling bearings, motors and other rotating heat generating components
US8657689B2 (en) 2008-07-03 2014-02-25 Deere & Company Annular flow distribution control of lubrication oil between concentric rotary shafts
DE102013207269A1 (de) * 2013-04-22 2014-10-23 Pfeiffer Vacuum Gmbh Statorelement für eine Holweckpumpstufe, Vakuumpumpe mit einer Holweckpumpstufe und Verfahren zur Herstellung eines Statorelements für eine Holweckpumpstufe
JP7292881B2 (ja) * 2019-01-10 2023-06-19 エドワーズ株式会社 真空ポンプ

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB923779A (en) * 1962-01-25 1963-04-18 Licentia Gmbh Improvements in lubricating arrangements for compressors
DE2119857A1 (de) * 1971-04-23 1972-11-02 Leybold-Heraeus GmbH & Co KG, 5000 Köln Einrichtung zur Ölversorgung von Lagerstellen
JPS5776201A (en) * 1980-10-31 1982-05-13 Hitachi Ltd Oil feed device for scroll hydraulic machine
US4432693A (en) * 1982-02-18 1984-02-21 The Trane Company Centrifugal pump impeller
US4565503A (en) * 1982-10-12 1986-01-21 Tecumseh Products Company Device for cooling motor end-turns in a compressor
US4724928A (en) * 1986-04-14 1988-02-16 Carrier Corporation Single stage oil pump lubrication system
EP0315761B1 (de) * 1987-11-12 1991-10-16 Leybold Aktiengesellschaft Ölversorgungseinrichtung
US4877381A (en) * 1988-05-12 1989-10-31 Tecumseh Products Company Compressor shaft collar through port for pressure equalization between fluid pockets
US5842420A (en) * 1992-09-07 1998-12-01 Khoo; Chew Thong Crankshaft lubrication system
BR9300797A (pt) * 1993-03-02 1994-10-04 Brasil Compressores Sa Bomba de óleo para compressor hermético de velocidade variável
US5885066A (en) * 1997-02-26 1999-03-23 Matsushita Electric Industrial Co., Ltd. Scroll compressor having oil bores formed through the crank shaft
US6527085B1 (en) * 2000-11-14 2003-03-04 Tecumseh Products Company Lubricating system for compressor
US6375444B1 (en) * 2001-02-14 2002-04-23 Scroll Technologies Axial pressure seal lubricator

Also Published As

Publication number Publication date
JP2003042091A (ja) 2003-02-13
DE60215418T2 (de) 2007-08-30
EP1267082A3 (en) 2003-10-15
US20030000772A1 (en) 2003-01-02
EP1267082A2 (en) 2002-12-18
DE60215418D1 (de) 2006-11-30
US20050271528A1 (en) 2005-12-08
ATE343067T1 (de) 2006-11-15
GB0114397D0 (en) 2001-08-08

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