EP0451085A2 - Pompe à rotors à vis - Google Patents

Pompe à rotors à vis Download PDF

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Publication number
EP0451085A2
EP0451085A2 EP91710004A EP91710004A EP0451085A2 EP 0451085 A2 EP0451085 A2 EP 0451085A2 EP 91710004 A EP91710004 A EP 91710004A EP 91710004 A EP91710004 A EP 91710004A EP 0451085 A2 EP0451085 A2 EP 0451085A2
Authority
EP
European Patent Office
Prior art keywords
spindle
pressure
screw pump
suction
angle
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.)
Granted
Application number
EP91710004A
Other languages
German (de)
English (en)
Other versions
EP0451085A3 (en
EP0451085B1 (fr
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=EP0451085(A2) "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
Priority to EP96105318A priority Critical patent/EP0727581B1/fr
Publication of EP0451085A2 publication Critical patent/EP0451085A2/fr
Publication of EP0451085A3 publication Critical patent/EP0451085A3/de
Application granted granted Critical
Publication of EP0451085B1 publication Critical patent/EP0451085B1/fr
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 running spindle, which are mounted in a recess of a housing surrounding them between a suction chamber and a pressure chamber.
  • Such a screw pump is described by way of example in DE-OS 38 15 158.
  • the typical pressure pulsation is superimposed with a forced inverse pressure pulsation, which can be achieved by periodically controlling a part of the flow on the pressure side of the conveyor screws.
  • This method is made possible by a pressure-side diaphragm, which is designed with a drain to the suction side, which is periodically covered by a closure element depending on the rotational position of the drive spindle.
  • wedge bevels tapering towards the suction space are incorporated into the receiving bores at the pressure-side end of the housing.
  • EP-OS 209 984 shows a screw pump mentioned at the beginning, whose drive spindle engages with the protruding thread in the thread formations of some running spindles and is said to form several tight chambers.
  • at least one circumferential channel is provided around the periphery of the spindles, so that the last of the sealed chambers at an outlet communicates with it - shortly before it is released by the chamber - partially via the channel.
  • the pressure-side profile outlet of the spindle is tapered on the outside diameter and the angle of inclination of the cone surface is less than 10 °.
  • the angle of inclination of the cone surface is less than 10 °.
  • This pressure-side bevel causes a gradual and defined opening of the pressure-side chamber to take place at the appropriate time; This largely compensates for the increase in volume flow or pressure caused by closing the suction side. The initial pulsation is significantly reduced.
  • the suction-side profile end can also be provided with such a flat conical surface, although the axial length of the latter conical surface should be less than the axial length of the pressure-side conical surface.
  • the tooth thickness of the drive spindle should be reduced towards the profile runout or the tooth gap of the spindle corresponding to this tooth thickness should be widened in the same direction.
  • a screw pump 10 has in a housing 12 a drive spindle 14 of the outer diameter d and two laterally arranged running spindles 16.
  • the spindles 14, 16 are mounted in overlapping receiving bores 18 of the housing 12.
  • the housing 12 is closed both on the pressure side and on the suction side to form a pressure chamber 20 and a suction chamber 22, each with a pump cover 25 or 24.
  • the drive spindle 14 guided through the pressure-side pump cover 25 is provided with an axial thrust compensation piston 28 in the area of a through bore 26 and is additionally supported with a bearing 30 in a cover attachment 32. In the latter there is also a shaft seal 34.
  • the interior 36 of the lid attachment 32 is relieved of the delivery pressure; the liquid entering from the pressure chamber 20 is discharged via a relief channel 38 which opens into the suction chamber 22 via a connecting bore 40 in the housing 12.
  • Fig. 2 makes it clear that the drive spindle 14 - the profile length - is tapered at its ends, the length of the pressure-side cone 42 with e, the length of the suction-side cone 42 s protruding with that end face 44 by e1, between the conical surfaces 43, 43 s remaining cylinder length of the drive spindle 14 with q, the pitch angle of the thread 15 of the drive spindle 14 - or the spindle 16 - indicated only partially in Fig. 2 - with t and the slope with s .
  • the pressure-side cone angle w or the suction-side cone angle w 1 is preferably 2 °.
  • the length adjustment of the entire system is chosen so that a portion of the sealing lines shown in FIG. 3 is generated during part of the production period; this means an increase from Qvmax to Qvmin.
  • the pulsation pattern is thus changed by attaching the described conical surface 43 to the pressure-side spindle end, which leads to a decrease in Qv and Q kom .
  • the elongation of the cross-sectionally inclined conical surface 43 has the effect that, on the one hand, the pressure side opens earlier, and on the other hand the cross-sections become continuously larger during opening. It may be sufficient to provide the pressure side with the cone 42 and to leave the spindle end on the suction side cylindrical.
  • the operating system for the three-spindle screw pump 10 shown can be described as follows: On the basis of a certain number of chambers n, which is a measure of the internal pressure build-up in the pump, the ratio of length to slope - ie a / s - represents an analogue quantity for the geometric implementation; the greater this ratio, the smaller the pressure increase per unit length.
  • x is a prefactor with 0.15 ⁇ x ⁇ 0.4
  • n describes the number of chambers acting on average.
  • the pre-factor x is a measure of the pre-compression, which, depending on the profile, only occurs for values above 0.1 - 0.15.
  • the pressure-side cone 42 must be matched to that dimension x - that is, to the pre-compression achieved.
  • the length e is chosen such that for the normal case
  • the cone 42 s on the suction side generally allows the adjustment of the closing characteristics, as shown at A 'in Fig. 2.
  • This cone 42 s must be precisely matched to the pressure-side cone 42 on the basis of a defined length ratio a / s.
  • e1 of the cone 42 s to choose less than the length e of the other cone 42.
  • the length e to make the pressure-side cone 42 smaller overall length.
  • the tooth thickness b of the thread 15 of the drive spindle 14 is reduced at the profile runout.
  • the tooth gap of the spindle 16 can also be widened.
  • the constructive relief of the tooth thickness b 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. 4 in the profile must be clear in relation to the spindle pitch s.
  • the reduction in tooth thickness or the widening of the tooth gap must have a small gradient y: x 1.

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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Supercharger (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP91710004A 1990-03-08 1991-03-07 Pompe à rotors à vis Expired - Lifetime EP0451085B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96105318A EP0727581B1 (fr) 1990-03-08 1991-03-07 Pompe à rotors à vis

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4007273 1990-03-08
DE4007273 1990-03-08

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP96105318A Division EP0727581B1 (fr) 1990-03-08 1991-03-07 Pompe à rotors à vis

Publications (3)

Publication Number Publication Date
EP0451085A2 true EP0451085A2 (fr) 1991-10-09
EP0451085A3 EP0451085A3 (en) 1992-07-08
EP0451085B1 EP0451085B1 (fr) 1998-08-12

Family

ID=6401666

Family Applications (2)

Application Number Title Priority Date Filing Date
EP91710004A Expired - Lifetime EP0451085B1 (fr) 1990-03-08 1991-03-07 Pompe à rotors à vis
EP96105318A Expired - Lifetime EP0727581B1 (fr) 1990-03-08 1991-03-07 Pompe à rotors à vis

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP96105318A Expired - Lifetime EP0727581B1 (fr) 1990-03-08 1991-03-07 Pompe à rotors à vis

Country Status (6)

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

Families Citing this family (7)

* 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
RU2215189C2 (ru) * 2001-08-15 2003-10-27 Открытое Акционерное Общество "Сумское Машиностроительное Научно-Производственное Объединение Им. М.В. Фрунзе" Насос для перекачивания вязких жидкостей
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
DE102023110207A1 (de) * 2023-04-21 2024-10-24 R-718 Spindel GbR (vertretungsberechtigter Gesellschafter: Dietmar Rook, 25421 Pinneberg) Abspannung der Spindelrotorgewindezahnenden

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
ATE169721T1 (de) 1998-08-15
JP3036874B2 (ja) 2000-04-24
KR910017081A (ko) 1991-11-05
ATE176717T1 (de) 1999-02-15
US5123821A (en) 1992-06-23
EP0727581B1 (fr) 1999-02-10
KR0177815B1 (ko) 1999-04-15
BR9100993A (pt) 1991-11-05
EP0451085A3 (en) 1992-07-08
EP0727581A1 (fr) 1996-08-21
EP0451085B1 (fr) 1998-08-12
JPH05231341A (ja) 1993-09-07

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