EP0727581B1 - Schraubenspindelpumpe - Google Patents

Schraubenspindelpumpe Download PDF

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Publication number
EP0727581B1
EP0727581B1 EP96105318A EP96105318A EP0727581B1 EP 0727581 B1 EP0727581 B1 EP 0727581B1 EP 96105318 A EP96105318 A EP 96105318A EP 96105318 A EP96105318 A EP 96105318A EP 0727581 B1 EP0727581 B1 EP 0727581B1
Authority
EP
European Patent Office
Prior art keywords
spindle
pressure
pulsation
screw rotor
rotor pump
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 - Lifetime
Application number
EP96105318A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0727581A1 (de
Inventor
Rolf Dipl.-Ing. Quast
Klaus Dipl.-Ing. Willibald
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.)
Allweiler GmbH
Original Assignee
Allweiler 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6401666&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0727581(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Allweiler AG filed Critical Allweiler AG
Publication of EP0727581A1 publication Critical patent/EP0727581A1/de
Application granted granted Critical
Publication of EP0727581B1 publication Critical patent/EP0727581B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0049—Equalization of pressure pulses
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels

Definitions

  • the invention relates to a screw pump with a Drive spindle and at least one spindle, which in a recess of a surrounding housing between a suction chamber and a pressure chamber are stored.
  • EP-A 209 984 can a screw pump mentioned at the beginning are removed, the drive spindle with their cantilevered thread in the thread formations of some spindles engages and form several tight chambers should.
  • at least one is circumferential Channel provided around the periphery of the spindles, so that the last of the tight chambers at an outlet with this - shortly before its approval by the chamber - partially communicated through the channel.
  • a screw pump leads to the solution of this task according to the teaching of claim 1; according to the invention the tooth thickness of the drive spindle towards the profile runout decreased. According to another feature of the invention the one corresponding to the tooth thickness of the drive spindle Spindle tooth gap widened in the same direction be.
  • This pressure-side cross-sectional change causes the appropriate Point in time a gradual and defined opening of the pressure-side chamber takes place; so that through the Closing the suction side resulting volume flow or Pressure increase can be largely compensated.
  • the Initial pulsation is significantly reduced.
  • a screw pump 10 has a housing 12 in a Drive spindle 14 of the outer diameter d and two laterally arranged spindles 16 on.
  • the spindles 14, 16 are in themselves overlapping receiving bores 18 of the housing 12 mounted.
  • the housing 12 is both on the pressure side and on the suction side Formation of a pressure chamber 20 and a suction chamber 22 each with a pump cover 25 or 24 closed.
  • the through the pressure-side pump cover 25 guided drive spindle 14 is in Area of a through hole 26 with an axial thrust compensation piston 28 provided and with a bearing 30 in one Lid attachment 32 additionally supported. In the latter there is also a shaft seal 34.
  • the interior 36 of the lid attachment 32 is from the delivery pressure relieved; the liquid entering from the pressure chamber 20 is over discharged a relief channel 38, which via a Connection bore 40 of the housing 12 in the suction chamber 22 flows into.
  • the tooth gap of the Spindle 16 can be widened.
  • the design change of the tooth thickness a or the tooth gaps towards the profile runout is to be carried out so that the pre-opening can take place early enough; the length of the change x 1 according to FIG. 2 in the profile must be clear in relation to the spindle pitch.
  • the reduction in tooth thickness or the widening of the tooth gap must have a small gradient ⁇ y: x 1 .
  • the length adjustment of the entire system is chosen so that during part of the funding period one in FIG reproduced more of sealing lines is generated; this means an increase from Qvmax to Qvmin.
  • the pulsation pattern is changed by applying the described cross-sectional change to the pressure-side spindle end, which leads to a decrease in Qv and Q kom .
  • the prolongation of the change in cross-section causes, on the one hand, the pressure side to open earlier, and, on the other hand, the cross-sections to continuously increase during opening. It may be sufficient to provide the pressure side with the change in cross-section and to leave the spindle end on the suction side unchanged.
  • the active system can be described as follows:
  • the ratio is a measure of the internal pressure build-up in the pump from length to slope an analogous size for represents the geometric realization; the greater this ratio the smaller the pressure increase per unit length.
  • the pre-factor x is a measure of the pre-compression, which in the other only depending on the profile for values above 0.1 - 0.15 occurs.
  • This cross-sectional change must be based on a defined aspect ratio on the print side Cross-sectional change must be precisely coordinated. So is expediently the length of the cross-sectional change choose smaller than the length of the others Cross-sectional change. Furthermore, with the measure unchanged Spindle packages 14, 16 the length of the print side Make cross-sectional changes smaller overall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Supercharger (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP96105318A 1990-03-08 1991-03-07 Schraubenspindelpumpe Expired - Lifetime EP0727581B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4007273 1990-03-08
DE4007273 1990-03-08
EP91710004A EP0451085B1 (de) 1990-03-08 1991-03-07 Schraubenspindelpumpe

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP91710004.2 Division 1991-03-07
EP91710004A Division EP0451085B1 (de) 1990-03-08 1991-03-07 Schraubenspindelpumpe

Publications (2)

Publication Number Publication Date
EP0727581A1 EP0727581A1 (de) 1996-08-21
EP0727581B1 true EP0727581B1 (de) 1999-02-10

Family

ID=6401666

Family Applications (2)

Application Number Title Priority Date Filing Date
EP91710004A Expired - Lifetime EP0451085B1 (de) 1990-03-08 1991-03-07 Schraubenspindelpumpe
EP96105318A Expired - Lifetime EP0727581B1 (de) 1990-03-08 1991-03-07 Schraubenspindelpumpe

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP91710004A Expired - Lifetime EP0451085B1 (de) 1990-03-08 1991-03-07 Schraubenspindelpumpe

Country Status (6)

Country Link
US (1) US5123821A (ko)
EP (2) EP0451085B1 (ko)
JP (1) JP3036874B2 (ko)
KR (1) KR0177815B1 (ko)
AT (2) ATE169721T1 (ko)
BR (1) BR9100993A (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI104440B (fi) * 1995-06-22 2000-01-31 Kone Corp Ruuvipumppu ja ruuvipumpun ruuvi
US6623262B1 (en) 2001-02-09 2003-09-23 Imd Industries, Inc. Method of reducing system pressure pulsation for positive displacement pumps
GB0226529D0 (en) * 2002-11-14 2002-12-18 Dana Automotive Ltd Pump
US8096288B2 (en) * 2008-10-07 2012-01-17 Eaton Corporation High efficiency supercharger outlet
DE102017210767B4 (de) * 2017-06-27 2019-10-17 Continental Automotive Gmbh Schraubenspindelpumpe, Kraftstoffförderaggregat und Kraftstofffördereinheit

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2652192A (en) * 1947-06-13 1953-09-15 Curtiss Wright Corp Compound-lead screw compressor or fluid motor
US2952216A (en) * 1956-03-13 1960-09-13 Wildhaber Ernest Rotary screw unit for displacing fluid
US2922377A (en) * 1957-09-26 1960-01-26 Joseph E Whitfield Multiple arc generated rotors having diagonally directed fluid discharge flow
CH390690A (de) * 1959-02-23 1965-04-15 Imo Industri Ab Schraubenpumpe
FR1243471A (fr) * 1959-08-31 1960-10-14 Perfectionnements aux rotors pour pompes, moteurs, compresseurs, ventilateurs, compteurs et autres dispositifs similaires
US3103894A (en) * 1960-02-18 1963-09-17 Laval Turbine Screw pump
DE2033201C3 (de) * 1970-07-04 1979-02-01 Allweiler Ag Schraubenspindelmotor oder -pumpe
SE383774B (sv) * 1975-04-02 1976-03-29 Imo Industri Ab Skruvpump
JPS5238615A (en) * 1975-09-22 1977-03-25 Mayekawa Mfg Co Ltd Screw compressor
JPS5936116B2 (ja) * 1976-08-07 1984-09-01 株式会社荏原製作所 流体機械
FR2538463B1 (fr) * 1982-12-23 1985-06-21 Dba Machine volumetrique a vis coniques
JPS61294178A (ja) * 1985-06-24 1986-12-24 Kawasaki Heavy Ind Ltd ねじポンプ
DE3815158A1 (de) * 1988-05-04 1989-11-16 Allweiler Ag Verfahren zur verringerung der druckpulsation einer verdraengerpumpe, insbesondere einer schraubenspindelpumpe und eine danach ausgefuehrte schraubenspindelpumpe

Also Published As

Publication number Publication date
EP0451085A2 (de) 1991-10-09
US5123821A (en) 1992-06-23
ATE169721T1 (de) 1998-08-15
KR910017081A (ko) 1991-11-05
KR0177815B1 (ko) 1999-04-15
JPH05231341A (ja) 1993-09-07
EP0451085A3 (en) 1992-07-08
EP0451085B1 (de) 1998-08-12
ATE176717T1 (de) 1999-02-15
JP3036874B2 (ja) 2000-04-24
BR9100993A (pt) 1991-11-05
EP0727581A1 (de) 1996-08-21

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