GB1132436A - Improvements in or relating to rotary vacuum pumps - Google Patents

Improvements in or relating to rotary vacuum pumps

Info

Publication number
GB1132436A
GB1132436A GB5052/66A GB505266A GB1132436A GB 1132436 A GB1132436 A GB 1132436A GB 5052/66 A GB5052/66 A GB 5052/66A GB 505266 A GB505266 A GB 505266A GB 1132436 A GB1132436 A GB 1132436A
Authority
GB
United Kingdom
Prior art keywords
rotor
contour
ratio
nodal point
casing
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
Application number
GB5052/66A
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 Heraeus GmbH
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 Heraeus GmbH filed Critical Leybold Heraeus GmbH
Publication of GB1132436A publication Critical patent/GB1132436A/en
Expired 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/02—Liquid sealing for high-vacuum pumps or for compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/22—Rotary-piston pumps specially adapted for elastic fluids of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • F02B2053/005—Wankel engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2730/00—Internal-combustion engines with pistons rotating or oscillating with relation to the housing
    • F02B2730/01—Internal-combustion engines with pistons rotating or oscillating with relation to the housing with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber
    • F02B2730/018—Internal-combustion engines with pistons rotating or oscillating with relation to the housing with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber with piston rotating around an axis passing through the gravity centre, this piston or the housing rotating at the same time around an axis parallel to the first axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

1,132,436. Rotary vacuum pumps. LEYBOLDHERAEUS G.m.b. H & CO., K. G. Feb. 4, 1966 [Feb.4, 1965], No.5052/66. Heading F1F. A vacuum pump comprises a fixed casing and a rotor revolvable therein, wherein the rotor has a hypotrochoidal contour and includes a ring gear with internal teeth engageable with and rolling on a fixed gear and the casing has an interior contour corresponding to the outer envelope curve of the rotor and at least one nodal point always contacting the rotor contour during each revolution thereof, a suction port on one side and a discharge port on the other side of the or each said nodal point and an oil seal between the or each said nodal point and the rotor. In one embodiment, Fig. 3 (not shown) the ratio K of the diameter of the outer rolling circle to that of the inner fixed circle producing the hypotrochoidal contour of the rotor is 2 and this produces a rotor 22 having an elliptical contour 23 which planetarily rotates within a casing 24 having a closed curve with a simple nodal point 26. On one side of the point 26 is a suction port 27 connected to the space to be evacuated and on the other side thereof a discharge port 28 fitted with a discharge valve 30 and a chamber 31 containing oil. The number of teeth of the ring gear 21 is twice the number of the fixed gear 20. In another embodiment, in which the ratio K is 3 and the ratio of the number of teeth of the ring gear to the fixed gear 3:2, the rotor is of substantially triangular contour and the closed curve of the casing includes two oppositely disposed nodal points. Each nodal point is associated with a suction port and a discharge port. The pump may operate as a two-stage pump or the two suction ports may be connected to a common space and the two discharge ports to a common discharge. Other contours of rotor may be produced but the ratio K must always be a whole number and the ratio of numbers of teeth of the two gears must always be two successive whole numbers, e.g. 4:3, 5:4.
GB5052/66A 1965-02-04 1966-02-04 Improvements in or relating to rotary vacuum pumps Expired GB1132436A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0055056 1965-02-04

Publications (1)

Publication Number Publication Date
GB1132436A true GB1132436A (en) 1968-10-30

Family

ID=7158910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5052/66A Expired GB1132436A (en) 1965-02-04 1966-02-04 Improvements in or relating to rotary vacuum pumps

Country Status (4)

Country Link
US (1) US3387772A (en)
CH (1) CH430028A (en)
DE (1) DE1503544C3 (en)
GB (1) GB1132436A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2528309A (en) * 2014-07-17 2016-01-20 David Walker Garside Epitrochoidal type compressor

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH494347A (en) * 1968-05-02 1970-07-31 Leybold Heraeus Verwaltung Vacuum pump based on the rotary piston principle
US3876344A (en) * 1973-05-08 1975-04-08 Leonard R Nestor Counterbalance for rotary engine
US4018548A (en) * 1975-12-08 1977-04-19 Curtiss-Wright Corporation Rotary trochoidal compressor
FR2389382B1 (en) * 1977-05-06 1982-07-09 Anvar
WO1988001696A1 (en) * 1986-09-05 1988-03-10 Duffy James T Trochoidal gas processing devices
BE1007237A3 (en) * 1993-07-07 1995-05-02 Vadder Paul De Pump and engine with hypocycloid housing using a single vane, which formsthe pump rotor
US10087758B2 (en) 2013-06-05 2018-10-02 Rotoliptic Technologies Incorporated Rotary machine
US11035364B2 (en) 2015-05-29 2021-06-15 Sten Kreuger Pressure changing device
US10001123B2 (en) 2015-05-29 2018-06-19 Sten Kreuger Fluid pressure changing device
EP3580460A4 (en) 2017-04-07 2020-11-04 Stackpole International Engineered Products, Ltd. Epitrochoidal vacuum pump
CN108757166A (en) * 2018-06-12 2018-11-06 杜三平 A kind of four-stroke rotor engine
EP3850189A4 (en) 2018-09-11 2022-06-15 Rotoliptic Technologies Incorporated Sealing in helical trochoidal rotary machines
US11815094B2 (en) 2020-03-10 2023-11-14 Rotoliptic Technologies Incorporated Fixed-eccentricity helical trochoidal rotary machines
US11802558B2 (en) 2020-12-30 2023-10-31 Rotoliptic Technologies Incorporated Axial load in helical trochoidal rotary machines

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1340625A (en) * 1918-11-27 1920-05-18 Planche Benjamin Rene Rotary machine
US1686569A (en) * 1925-11-19 1928-10-09 Standard Pump & Supply Company Compressor
US1968113A (en) * 1930-08-02 1934-07-31 Comstock & Wescott Rotary engine or the like
GB557902A (en) * 1942-09-23 1943-12-09 Harold Kershaw Improvements in rotary piston machines
GB583035A (en) * 1943-08-20 1946-12-05 Bernard Maillard A rotary machine generating variable volumes
US2988065A (en) * 1958-03-11 1961-06-13 Nsu Motorenwerke Ag Rotary internal combustion engine
US3077867A (en) * 1958-10-07 1963-02-19 Nsu Motorenwerke Ag Multiple arrangement of rotary combustion engines
US3117561A (en) * 1960-04-26 1964-01-14 Bonavera Victor Rotor type power generating or work performing means
DE1242043B (en) * 1963-11-02 1967-06-08 Schmidt Gmbh Karl Piston bearings for rotary piston machines
US3226013A (en) * 1964-05-04 1965-12-28 Toyota Motor Co Ltd Rotary machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2528309A (en) * 2014-07-17 2016-01-20 David Walker Garside Epitrochoidal type compressor
GB2528309B (en) * 2014-07-17 2016-10-19 Walker Garside David Epitrochoidal type compressor

Also Published As

Publication number Publication date
US3387772A (en) 1968-06-11
CH430028A (en) 1967-02-15
DE1503544B2 (en) 1974-09-19
DE1503544A1 (en) 1970-03-12
DE1503544C3 (en) 1975-04-24

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