EP1722104B1 - Paire de rotors pour un compresseur à vis - Google Patents

Paire de rotors pour un compresseur à vis Download PDF

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Publication number
EP1722104B1
EP1722104B1 EP06008149.4A EP06008149A EP1722104B1 EP 1722104 B1 EP1722104 B1 EP 1722104B1 EP 06008149 A EP06008149 A EP 06008149A EP 1722104 B1 EP1722104 B1 EP 1722104B1
Authority
EP
European Patent Office
Prior art keywords
profile
rotors
rotor pair
screw compressor
screw
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.)
Not-in-force
Application number
EP06008149.4A
Other languages
German (de)
English (en)
Other versions
EP1722104A2 (fr
EP1722104A3 (fr
Inventor
Harald Martin
Ronald Dr. Sachs
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.)
Pfeiffer Vacuum GmbH
Original Assignee
Pfeiffer Vacuum 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 Pfeiffer Vacuum GmbH filed Critical Pfeiffer Vacuum GmbH
Publication of EP1722104A2 publication Critical patent/EP1722104A2/fr
Publication of EP1722104A3 publication Critical patent/EP1722104A3/fr
Application granted granted Critical
Publication of EP1722104B1 publication Critical patent/EP1722104B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • 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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • F04C2220/12—Dry running
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • 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
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum

Definitions

  • the characteristics of the compressors and the effort required to manufacture the rotors are largely determined by the design of the screw rotors. This shape is characterized by the screw profile. This can be described by the profile outline, which results, for example, in the axis or in the face section.
  • the object is achieved by a pair of rotors for a screw compressor, which is characterized in that the profile type of the screw profile is different at least two along the rotors axially spaced locations and that adapted to the respective pressure range profile types continuously merge into each other.
  • the term "steady" is to be understood in a mathematical sense. This means that the function describing the slope is always derivable.
  • the presented measures make it possible to change the shape of the gap, which exists on the profile engagement between the rotors, along the rotor axis and in each case to optimally adapt to the pressure conditions and tightness requirements.
  • Basis of the design is thus the gap type and not the gearing law as in the prior art.
  • the rotors Due to the continuous transition from one profile type to the next, the rotors can be manufactured in one piece. Above all, there are no steps and edges in the interior of the screw threads, which would adversely affect their gas-promoting and -compacting performance.
  • the change in pitch of the screw threads takes place in such a way that it is zero in certain areas. This allows an adaptation of the compression curve along the rotor axis to the flow or printing area. Since the compaction is controlled, among other things, via the slope and heat is generated during the compression of gases, the change in slope can influence the heat balance of the compressor.
  • a further advantage results if the change in pitch and the profile change at least in sections along the axis are not simultaneous. This measure results in a partial decoupling of the change in compression from the change in slope.
  • the profile type can be constant over an axial region, whereby a plurality of such regions can be present over the rotor length. This represents a further simplification of the production without having to forego the advantages that result from the combination of the profile types.
  • FIG. 2a shows the partial frontal section through the rotor pair at height I-I '.
  • the rotors 1 and 2 mesh with each other, ie in this sight, the screw threads overlap 5 and 6 and each push close to the shaft 3 or 4.
  • Dark colored and marked 8 is the area of the highest sealing effect between the rotors.
  • the designated 9 area has only a small sealing effect, which is indicated by the two broad arrows that symbolize gas flow.
  • the shape of the high sealing area is characteristic of the profile type.
  • the shown shape of the region 8 is almost exclusively radially between the two waves.
  • the high sealing effect in this area is paid for by a stronger overflow at the areas 9.
  • Such a type of profile is simple and inexpensive to manufacture. It is used in the embodiment at a point of high pressure, where the overflow 9 leads to a distribution of the gas heated by the compression. This influences the heat balance of the vacuum pump.
  • the profile types shown overlap each other continuously, so that different profile types are present at at least two axial locations of the rotors.
  • a profile type can be constant over a longer axial section before the transition to another profile type begins.
  • the continuous transition of the profile types results in mixed variants of the profile types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (7)

  1. Paire de rotors pour un compresseur à vis, les rotors (1, 2) étant en prise d'engrènement sans contact, avec à chaque fois au moins un filet, avec une variation de pas constante, la forme des rotors étant déterminée par un profil hélicoïdal, caractérisée en ce que le type de profil du profil hélicoïdal est différent en au moins deux endroits (20, 21, 22) espacés axialement le long des rotors et en ce que les types de profils adaptés à la région de pression respective se prolongent les uns dans les autres de manière continue.
  2. Paire de rotors pour un compresseur à vis selon la revendication 1, caractérisée en ce que la variation de pas est nulle dans certaines sections.
  3. Paire de rotors pour un compresseur à vis selon l'une quelconque des revendications précédentes, caractérisée en ce que le pas constant est décrit par une courbe de troisième degré.
  4. Paire de rotors pour un compresseur à vis selon l'une quelconque des revendications précédentes, caractérisée en ce que la variation de pas et la variation de profil ne se produisent pas simultanément le long de l'axe au moins dans certaines sections.
  5. Paire de rotors pour un compresseur à vis selon l'une quelconque des revendications précédentes, caractérisée en ce que le type de profil est constant sur au moins une région axiale.
  6. Paire de rotors pour un compresseur à vis selon l'une quelconque des revendications précédentes, caractérisée en ce que les rotors présentent un revêtement sur leur surface.
  7. Paire de rotors pour un compresseur à vis selon l'une quelconque des revendications précédentes, caractérisée en ce que la paire de rotors (1, 2) est utilisée dans une pompe à vide à vis à compression à sec.
EP06008149.4A 2005-05-14 2006-04-20 Paire de rotors pour un compresseur à vis Not-in-force EP1722104B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510022470 DE102005022470B4 (de) 2005-05-14 2005-05-14 Rotorpaar für Schraubenverdichter

Publications (3)

Publication Number Publication Date
EP1722104A2 EP1722104A2 (fr) 2006-11-15
EP1722104A3 EP1722104A3 (fr) 2014-01-01
EP1722104B1 true EP1722104B1 (fr) 2016-04-13

Family

ID=36699179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06008149.4A Not-in-force EP1722104B1 (fr) 2005-05-14 2006-04-20 Paire de rotors pour un compresseur à vis

Country Status (2)

Country Link
EP (1) EP1722104B1 (fr)
DE (1) DE102005022470B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105697373B (zh) * 2014-11-25 2017-08-25 巫修海 一种螺杆真空泵的螺杆

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2329800A1 (de) * 1972-07-06 1974-01-17 H & H Licensing Corp Verfahren und vorrichtung zum verdichten von gasfoermigen medien in schraubenkompressoren
KR0133154B1 (ko) * 1994-08-22 1998-04-20 이종대 무단 압축형 스크류식 진공펌프
KR100386753B1 (ko) * 1998-03-23 2003-06-09 다이코 기카이 고교 가부시키가이샤 드라이 진공펌프
DE19941787B4 (de) * 1999-09-02 2011-06-16 Leybold Vakuum Gmbh Schraubenvakuumpumpe mit Schraubengängen mit sich verändernder Steigung
CH694339A9 (de) * 2000-07-25 2005-03-15 Busch Sa Atel Zwillingsschraubenrotoren und solche enthaltende Ve rdraengermaschinen.
DE10102341A1 (de) * 2001-01-19 2002-08-08 Ralf Steffens Profilkontur einer Schraubenspindelpumpe
DE10129341A1 (de) * 2001-06-19 2003-01-02 Ralf Steffens Profilkontur einer Spindelpumpe
DE10334484A1 (de) * 2003-07-29 2005-03-24 Steffens, Ralf, Dr. Trockenverdichtende Spindelvakuumpumpe

Also Published As

Publication number Publication date
EP1722104A2 (fr) 2006-11-15
DE102005022470A1 (de) 2006-11-16
DE102005022470B4 (de) 2015-04-02
EP1722104A3 (fr) 2014-01-01

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