WO2002103205A1 - Contour profile des rotors helicoidaux d'une pompe a vis - Google Patents

Contour profile des rotors helicoidaux d'une pompe a vis Download PDF

Info

Publication number
WO2002103205A1
WO2002103205A1 PCT/EP2002/005775 EP0205775W WO02103205A1 WO 2002103205 A1 WO2002103205 A1 WO 2002103205A1 EP 0205775 W EP0205775 W EP 0205775W WO 02103205 A1 WO02103205 A1 WO 02103205A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle
rotor
profile
compressing
dry
Prior art date
Application number
PCT/EP2002/005775
Other languages
German (de)
English (en)
Inventor
Ralf Steffens
Original Assignee
Ralf Steffens
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 Ralf Steffens filed Critical Ralf Steffens
Publication of WO2002103205A1 publication Critical patent/WO2002103205A1/fr

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
    • 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
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • F04C2220/12—Dry running

Definitions

  • the invention relates to a dry-compressing spindle pump, in particular a vacuum pump, which is designed as a two-shaft displacement machine for conveying and compressing gases with a pair of oppositely identical spindle rotors with internal compression via variable spindle pitch along the spindle rotor axis, the spindle rotors being designed in mirror-image matching.
  • Dry-compressing pumps are becoming increasingly important, particularly in vacuum pumps, because due to increasing obligations regarding environmental protection regulations and increasing operating and disposal costs as well as increased requirements regarding the purity of the pumped medium, the well-known wet-running vacuum systems, such as liquid ring machines and rotary vane pumps, are increasingly being replaced by dry-compressing pumps .
  • These dry compacting machines include screw pumps, claw pumps, diaphragm pumps, piston pumps, scroll machines and Roots pumps. What these machines have in common, however, is that they still do not meet today's requirements in terms of reliability and robustness, as well as size and weight, and at the same time a low price level. At the moment, the market is still clearly dominated by the wet-running vacuum pumps of the liquid ring machines and the oil-lubricated rotary vane pumps.
  • dry-compressing vacuum pumps have the basic advantage that their rotor speed is not restricted as much as the positive displacement machines with an operating fluid in the working cavities. In addition to improving the volumetric efficiency, this can primarily achieve a significant reduction in the cost of the machine.
  • it is desirable to reduce the drive power required which is known to be achieved with dry-compression spindle pumps as 2-shaft displacement machines by internal compression.
  • the working chamber volume enclosed on the inlet side is reduced by a certain factor during transport along the rotor axis in the direction of the fluid outlet, for example by reducing the rotor spindle increase and / or the profile tooth height.
  • the power conversion along the rotor axis is Favorably distributed that the largest part of the compression performance is only implemented in the last rotor end area on the output side, so that correspondingly high temperatures occur during compression.
  • the object of the present invention is to find a solution for a dry-compressing spindle pump that is as simple and robust as possible and particularly inexpensive, which on the one hand dispenses with bypass valves and on the other hand nevertheless enables a high internal compression ratio with a more favorable distribution of the compression performance along the rotor axis.
  • German patent application 101 02 341.3 with a profile contour profile determined by the processing tool for the rotor pair of a screw pump.
  • this object is achieved in that the profile contour of the spindle rotors is designed with an increasing flank relief in each face cut compared to the profile contour specific to the gearing law.
  • the invention therefore provides that the profile contour profile for the pair of spindle rotors is changed in the end section along the rotor axis in such a way that the profile contour in the longitudinal direction of the rotor toward the outlet side in the sense of gas backflow with increasingly larger flank gap openings is carried out as partial flank recesses in the profile contour rolling of the rotor pair.
  • the actually produced flank contour is theoretically compared to that determined according to the gearing law TARGET profile profile in the respective face cut is withdrawn so that this partial flank reduction in the longitudinal direction of the rotor towards the outlet leads to an increasing gap between the rolling profile flanks of the pair of rotor spindles in the face cut.
  • This targeted flank relief can advantageously be achieved very easily with very little effort by the approach of the tool-specific profile contour described in German patent application 101 02 341.3.
  • the rotor profile rolling in the face cut is assessed using the toothing law. Based on the pitch circle, a distinction is made between a base profile area below the pitch circle and a head profile area above the pitch circle.
  • the tooth area of the one spindle rotor is subject to the head area of the counter rotor and vice versa.
  • this profile contour is not kept constant in the frontal section over the entire longitudinal axis of the rotor, but in the axial direction towards the outlet, the flank profile is preferably increasingly withdrawn in the head profile area, so that a pressure reduction can take place between the individual working chambers via the gas backflow.
  • This creates a certain internal bypass function so that the known external bypass valves can be omitted.
  • the amount of internal compression on the other hand, can be increased in the sense of the desired performance saving.
  • the pump housing is simplified in such a way that the manufacture of the pump housing can be easily converted to a simple extruded profile.
  • the compressor output along the spindle rotor axis is better distributed in the desired sense by not only converting the main part of the compressor output at the rotor end on the outlet side, but by distributing the compressor output better over a longer rotor area, so that heat dissipation is cheaper and the well-known extreme ones Temperature peaks can be avoided better.
  • the increased internal leakage is compensated for by a higher number of stages. This increases the number of closed working chambers between the inlet and outlet of the spindle pump, and the rotor length generally increases.
  • FIG. 1 shows a spindle rotor which, in a dry-compressing spindle pump, not shown in detail, interacts with a counter-spindle rotor which corresponds in mirror image, and
  • FIG. 2 shows, by way of example, various end cuts for individual z positions of the spindle rotor with the increasing flank relief according to the invention.
  • the Spindle rotor 1 has the length l, the outer diameter 0D and the profile tooth depth h.
  • German patent application 101 02 341.3 shows an example of the tool WZ for manufacturing the profile flanks, with which the profile design according to the invention can be implemented in a particularly favorable manner in the face cut according to FIG. 2.
  • FIG. 2 Various end cuts for individual z positions are shown by way of example in FIG. 2, only one individual profile flank side being shown in a simplified manner.
  • the complete forehead incision is made by simple symmetrical mirroring according to the number of teeth.
  • the invention is made very clear by the fact that the profile end cut flanks of the various z positions are all rotated in such a way that they all pass through the profile point C on the pitch circle 3 in this illustration.
  • the foot profile flank 5 runs between the profile point A on the base circle 2 and the point C on the pitch circle 3, whereas the head profile contour 6 associated according to the toothing law runs between the point C and the profile point E on the tip circle 4 with diameter 0D.
  • the invention is shown by way of example for the modification on the profile of the head profile.
  • This withdrawal of the head profile flank can be described and recorded, for example, in the forehead section using the central angle y.
  • This retraction of the profile flank depending on the z position in the face section via the value for the central angle y comprises several angular degrees in the x-y plane and is preferably in an angular range between 5 ° and 25 °.
  • flank relief can also be applied to the foot profile area: separately or in combination with the head profile area.
  • this form of flank relief increases as a function of the z position with decreasing spindle increase along the spindle rotor axis.
  • the bypass function is specifically shifted into the spindle profile, so that higher values for the internal compression ratio can be achieved, and at the same time a new type of power distribution tion along the spindle rotor axis by no longer converting most of the compaction performance on one side at the rotor end as before.
  • This profile contour according to the invention is preferably produced in accordance with German patent application 101 02 341.3 using a particularly simple tool for profile processing.

Landscapes

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

Abstract

L'invention concerne un contour profilé pour la paire de rotors d'une pompe à vis à compression sèche réalisée sous forme de dispositif volumétrique à deux arbres pour le transport et la compression de gaz. Pour réduire la puissance de compression par l'intermédiaire d'un pas de vis de rotor variable, l'invention vise à permettre une compression interne suffisamment élevée sans utiliser de soupapes de dérivation et à atteindre simultanément une répartition plus uniforme de la puissance de compression le long de l'axe des rotors. A cet effet, le contour profilé présente, par rapport au contour profilé spécifique à la géométrie d'engrènement, une dépouille de flanc qui augmente avec la diminution du pas de vis dans chaque section apparente. Cette dépouille de flanc se fait de préférence dans la zone de profil de tête au-dessus du cercle primitif pour la paire de rotors hélicoïdaux. Aucune dépouille de flanc n'est prévue dans la zone d'entrée du rotor hélicoïdal pour des valeurs faibles de z.
PCT/EP2002/005775 2001-06-19 2002-05-25 Contour profile des rotors helicoidaux d'une pompe a vis WO2002103205A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001129341 DE10129341A1 (de) 2001-06-19 2001-06-19 Profilkontur einer Spindelpumpe
DE10129341.0 2001-06-19

Publications (1)

Publication Number Publication Date
WO2002103205A1 true WO2002103205A1 (fr) 2002-12-27

Family

ID=7688567

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/005775 WO2002103205A1 (fr) 2001-06-19 2002-05-25 Contour profile des rotors helicoidaux d'une pompe a vis

Country Status (2)

Country Link
DE (1) DE10129341A1 (fr)
WO (1) WO2002103205A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1722104A2 (fr) * 2005-05-14 2006-11-15 Pfeiffer Vacuum GmbH Rotors pour un compresseur à vis
WO2014026440A1 (fr) * 2012-08-14 2014-02-20 东北大学 Rotor hélicoïdal à pas variable à tête unique avec largeur de sommet de dent égale
CN105697373A (zh) * 2014-11-25 2016-06-22 巫修海 一种螺杆真空泵的螺杆

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016216279A1 (de) 2016-08-30 2018-03-01 Leybold Gmbh Vakuumpumpen-Schraubenrotor
DE202016005209U1 (de) * 2016-08-30 2017-12-01 Leybold Gmbh Schraubenvakuumpumpe
DE102022213154A1 (de) 2022-12-06 2024-06-06 Vitesco Technologies GmbH Schleifscheibe, Verfahren zum Schleifen einer Laufspindel, Laufspindel, Verfahren zur Herstellung einer Spindelpumpenstufe und Spindelpumpenstufe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594691C (de) * 1933-01-04 1934-03-21 Aeg Schraubenverdichter, bestehend aus rechts- und linksgaengigen, miteinander in Eingriff stehenden, durch Zahnraeder gekuppelten Schrauben
DE4224969C1 (de) * 1992-07-29 1993-09-30 Heinrich Moeller Förderschraubenpaar für rotierende Verdrängerpumpen
DE19941787A1 (de) * 1999-09-02 2001-03-08 Leybold Vakuum Gmbh Schraubenvakuumpumpe mit Schraubengängen mit sich verändernder Steigung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594691C (de) * 1933-01-04 1934-03-21 Aeg Schraubenverdichter, bestehend aus rechts- und linksgaengigen, miteinander in Eingriff stehenden, durch Zahnraeder gekuppelten Schrauben
DE4224969C1 (de) * 1992-07-29 1993-09-30 Heinrich Moeller Förderschraubenpaar für rotierende Verdrängerpumpen
DE19941787A1 (de) * 1999-09-02 2001-03-08 Leybold Vakuum Gmbh Schraubenvakuumpumpe mit Schraubengängen mit sich verändernder Steigung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1722104A2 (fr) * 2005-05-14 2006-11-15 Pfeiffer Vacuum GmbH Rotors pour un compresseur à vis
EP1722104A3 (fr) * 2005-05-14 2014-01-01 Pfeiffer Vacuum GmbH Rotors pour un compresseur à vis
WO2014026440A1 (fr) * 2012-08-14 2014-02-20 东北大学 Rotor hélicoïdal à pas variable à tête unique avec largeur de sommet de dent égale
CN105697373A (zh) * 2014-11-25 2016-06-22 巫修海 一种螺杆真空泵的螺杆
CN105697373B (zh) * 2014-11-25 2017-08-25 巫修海 一种螺杆真空泵的螺杆

Also Published As

Publication number Publication date
DE10129341A1 (de) 2003-01-02

Similar Documents

Publication Publication Date Title
DE2529331C2 (de) Schraubenkompressor
DE102013210817B4 (de) Spindelverdichter
DE102013009040B4 (de) Spindelkompressor mit hoher innerer Verdichtung
DE7625941U1 (de) Rotorverdraengermaschine mit einer schnecke
EP2867532B1 (fr) Pompe à vis
DE1403541A1 (de) Umlaufmaschine,insbesondere Schraubenverdichter fuer Gase
WO2002103205A1 (fr) Contour profile des rotors helicoidaux d'une pompe a vis
EP0828941B1 (fr) Compresseur a vis, a volume deplace reglable
WO2013023954A2 (fr) Pompe roots
EP3638906A1 (fr) Pompe roots à étages multiples
DE3434694A1 (de) Schraubenverdichter fuer gasfoermige medien
DE4134965A1 (de) Spiralverdichter mit modifizierter kopfnut
DE102009016790A1 (de) Schraubenverdichteraggregat mit Volumenstromregelung
DE69835520T2 (de) Schraubenverdichter mit verstellbarer volllastkapazität
EP3961035A1 (fr) Procédé et pompe à broche hélicoïdale destinés au pompage d'un mélange gaz-liquide
WO1992008051A1 (fr) Pompe a pistons, notamment pompe a pistons radiaux
EP0603698B1 (fr) Pompe à vide avec piston roulant
WO2012045876A2 (fr) Pompe, compresseur ou moteur à étages multiples ou à flux multiples
DE3143193A1 (de) Regelbarer aussenachsiger rotationskolbenkompressor
DE10334484A1 (de) Trockenverdichtende Spindelvakuumpumpe
DE10326466B4 (de) Schieber mit Anlaufentlastung
DE102009023507A1 (de) Verdichteraggregat mit einem Schraubenverdichter
WO2011023513A2 (fr) Pompe volumétrique à compression interne
DE1428103C (de) Einrichtung zur Druckerhöhung eines von einer Brennkraftmaschine angetriebenen Verdrängerverdichters
DE10230407B4 (de) Innenzahnradpumpe mit variabler Abdichtung

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2002738110

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 2002738110

Country of ref document: EP

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP