EP0620369B1 - Pompe à engrenages - Google Patents

Pompe à engrenages Download PDF

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Publication number
EP0620369B1
EP0620369B1 EP94109865A EP94109865A EP0620369B1 EP 0620369 B1 EP0620369 B1 EP 0620369B1 EP 94109865 A EP94109865 A EP 94109865A EP 94109865 A EP94109865 A EP 94109865A EP 0620369 B1 EP0620369 B1 EP 0620369B1
Authority
EP
European Patent Office
Prior art keywords
bearing
shaft
gear pump
seal
sealing
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
EP94109865A
Other languages
German (de)
English (en)
Other versions
EP0620369A3 (fr
EP0620369A2 (fr
Inventor
Martin Sauter
Peter Blume
Roger Stehr
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.)
Maag Pump Systems AG
Original Assignee
Maag Pump Systems AG
Maag Pump Systems Textron 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
Application filed by Maag Pump Systems AG, Maag Pump Systems Textron AG filed Critical Maag Pump Systems AG
Priority to DE59407028T priority Critical patent/DE59407028D1/de
Priority to AT94109865T priority patent/ATE172006T1/de
Priority to EP94109865A priority patent/EP0620369B1/fr
Publication of EP0620369A2 publication Critical patent/EP0620369A2/fr
Publication of EP0620369A3 publication Critical patent/EP0620369A3/fr
Application granted granted Critical
Publication of EP0620369B1 publication Critical patent/EP0620369B1/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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • 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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • 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
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps

Definitions

  • the present invention relates to a gear pump according to the Preamble of claim 1 and a method for rinsing the Seal on such a gear pump according to the preamble of claim 13.
  • Non-contact seals for these purposes to be provided between the shaft and the stator, with a defined sealing gap, for example labyrinth seals.
  • Such Seal can usually, the usual shaft eccentricity and thus taking into account the usual seal play, only optimally effective from a certain operating point be sealed, for example depending on the pump speed Differential pressure, temperature and the medium to be sealed, especially material to be conveyed.
  • labyrinth seals used variable radial play, depending on the operating pressure and temperature, which the Change the sealing effect.
  • one according to the invention closes Seal on one side, especially on the delivery chamber side, to a roller bearing for the rotor.
  • a shaft-side area is shifted axially or a stator-side area.
  • a shaft-side shift of the mentioned sealing or Storage area is by axially moving one another Wave sections possible. In this case, such an axial displacement a shaft part with sealing part e.g. of a Rolling bearings can be added easily.
  • the storage temperature and / or the differential pressure between The suction and pressure sides of the pump are detected and functioning of one measurement signal or as a function of a combination of both acted on an actuator by which, in the sense of the present invention, the sealing clearance and / or the Camp play be put.
  • a method according to the invention is in claim 13 specified for flushing the seal on a gear pump, which in addition to the continuous adjustment of the sealing gap can be used or, according to the invention, insulated, that is to say on a seal according to the invention, with an axial relative displacement of the sealing surfaces is intended exclusively for the rinsing process.
  • Fig. 1 is the one toothed rotor 1 of a gear pump Stator 3 shown schematically in longitudinal section.
  • the rotor 1 comprises a shaft 5 which is mounted on the stator 3.
  • shaft 5 5a which, as shown, is frustoconical is trained. That adjacent to the frustoconical section 5a Section 7a of the stator-side shaft bore 7 is formed in the shape of a truncated cone, the opening angle of the two conical surfaces 5a and 7a are preferably the same. Between the frustoconical surface 5a and the stator side 7a, a gap 9 is defined.
  • Adjustment device axially with respect to the two areas 5a and 7a the axis A of the rotor 1 shifted relative to each other can be. As can be easily seen, it follows thereby the possibility of varying the width of the gap 9. According to the invention, this procedure can be carried out either for one 1 basically designed seal used are and / or for a slide bearing designed according to FIG. 1 the shaft 5 on the stator 3.
  • 1 is a relative axial displacement according to the invention areas 5a and 7a. This can either done by an axially fixed, stator side Surface 7a and an axially displaceable, shaft-side surface 5a or vice versa.
  • a shaft 5 is shown schematically in FIG which the truncated cone region 5a is designed to be axially displaceable is.
  • the shaft 5 is formed in two parts, with parts 5 'and 5 ", for example the shaft part 5' is fixedly connected to the gear, not shown here.
  • stator 3 again schematically, shows the stator 3 with the stator-side frustoconical section 7a.
  • stator 3 basically also comprises two parts 3 ′ and 3 ", the part 3 'of the puncture delivery space, not shown here Are defined.
  • a second stator part 3 " in the stator part that is fixed with respect to the delivery chamber 3 ' is axially displaceable a second stator part 3 ", as shown schematically at 15, rotationally fixed, axially displaceable, V ', which part 3 "the frustoconical Surface area 7a of the stator-side shaft bore 7 wearing.
  • FIG. 4 shows an inventive combination of an inventive one Plain bearing and an inventive Seal on one and the same shaft 5 of a gear rotor 1 shown schematically.
  • a slide bearing according to the invention with shafts side, frustoconical bearing surface 25a provided with interacting, on the stator side, a truncated cone Storage area 27a.
  • the two bearing surfaces 27a and 25a are movable relative to one another, as represented by V ', by analogy to Fig. 2, the shaft 5 one with the gear connected part 5 'and in this regard axially displaceable 5 "includes.
  • a seal according to the invention is provided.
  • the stator 3 is for the realization of an independent of the bearing 25a, 27a adjustable seal, in analogy to the explanations for Fig. 3, with a stationary part 3 'defining a conveying space trained and in this regard, as shown again with V ", axially displaceable, defining the sealing surface 37a Part 3".
  • a schematically represented feed element 40 such as a hydraulic one Piston arrangement or a spindle adjusting device, acts axially on the part 5 "of the shaft 5 with respect to the stationary Stator part 3 ', with which the shaft-side bearing surface 25a axial, increasing or reducing bearing gap 29, shifted can be.
  • the sealing gap 39 remain the same between the sealing surfaces 37a and 35a the feed of the part 5 "also on the axially displaceable Stator part 3 "transferred.
  • the sealing gap becomes independent of the bearing gap conditions 39 by the further, schematically represented actuating arrangement 41 adjusted, again e.g. through a hydraulic Actuator arrangement or a spindle drive.
  • bearing gap 29 and sealing gap 39 can be adjusted synchronously in time and distance by using the 4 provided stator part 3 "also as axially immovable Part is formed.
  • FIG. 5 shows a further embodiment variant shows which seal or bearing area can be adjusted in analogy to FIG. 3 in that a part 3 "of the stator 3 with respect to a stationary stator part 3 'can be moved axially to seal or bearing gap to change. 5 as Seal formed, so are the position signs in Analogous to Fig. 4 used, in addition to the preferred continuous actuating device 43, in analogy to FIG.
  • a step control unit 45 is provided with which a control intervention S mechanically, pneumatically or hydraulically, the sealing gap 39 is expanded in one step is - in the example shown by sliding to the right of the stator part 3 "that a largely unobstructed flushing flow can be done through the sealing gap 39 and that as Pumped medium used by axial grooves 46 or a radial channel 47 can emerge.
  • FIG. 6 shows on the basis of a function block / signal flow diagram how, according to the invention, a gear pump, bearing gap and / or sealing gap can be automatically controlled according to the invention.
  • the differential pressure ⁇ p x between the suction-side pressure p s and the pressure-side pressure p D is measured on the gear pump 50.
  • the bearing temperature 52 is measured on the slide bearing designed according to the invention, schematically represented by 52, and on the seal 54 designed according to the invention preferably a signal m ⁇ that is significant for the leakage through the seal 54.
  • Differential pressure ⁇ p , bearing temperature ⁇ 52 and possibly leakage indication signal m ⁇ are fed to a calculation unit 56, which, in particular as a function of differential pressure and bearing temperature, generates a controlled variable X 1 for the bearing gap actuator 58, in analogy to the actuator 40 from FIG. 4 and a sealing gap control variable X 2 for setting a sealing gap actuator 60, in analogy to the actuator 41 from FIG. 4.
  • control variables X 1 and X 2 calculated on the unit 56 are formed with predeterminable control variables W 1 and W 2 to form respective control differences.
  • the one and / or other control loop can be omitted if, for example, only bearings or only seals are designed or to be regulated according to the invention.
  • a single controlled variable X 1,2 is determined, for example, which, optimized, takes into account both the bearing and the sealing gap requirements in function, in particular of the pump differential pressure ⁇ p and the bearing temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (13)

  1. Pompe à engrenages comportant au moins un joint d'étanchéité d'arbre (5a, 7a) qui agit entre un arbre de rotor (5) et le stator (3) à l'encontre d'un passage axial de produit à transporter et qui comprend des surfaces d'étanchéité étendues axialement, situées côté stator (7a) et côté arbre (5a) et se faisant face, étant précisé que les surfaces d'étanchéité qui se font face (5a, 7a) présentent au moins dans une section de surface (5a, 7a) une composante d'orientation radiale et que la zone d'arbre comportant la section (5a) et la zone de carter comportant la section (7a) sont mobiles axialement (v) l'une par rapport à l'autre, caractérisée en ce que le joint d'étanchéité d'arbre est sollicité par le produit à transporter et les surfaces d'étanchéité étendues axialement sont mobiles axialement l'une par rapport à l'autre grâce aux éléments d'étanchéité qui les portent, de telle sorte que pour des produits différents à transporter au niveau de la pompe, l'interstice d'étanchéité (9) est réglable le long des surfaces d'étanchéité (5a, 7a).
  2. Pompe à engrenages comportant au moins un arbre, monté sur palier lisse au moins unilatéralement en étant lubrifié à l'intérieur ou à l'extérieur par le produit à transporter, qui présente une surface formant palier située côté stator (7a) et une surface formant palier située côté arbre (5a), caractérisée en ce que les surfaces formant paliers situées côté stator et côté arbre (5a, 7a) ont une forme tronconique et le jeu de paliers est réglable grâce à un déplacement relatif axial (v) des surfaces formant paliers (5a, 7a), de telle sorte que pour des produits différents à transporter au niveau de la pompe, l'interstice d'étanchéité (9) est réglable le long des surfaces d'étanchéité (5a, 7a).
  3. Pompe à engrenages selon la revendication 1, caractérisée en ce que l'arbre est monté sur palier lisse au moins unilatéralement en étant lubrifié à l'intérieur ou à l'extérieur par le produit à transporter, en ce qu'il est prévu à cet effet une surface formant palier située côté arbre (5a) et une surface formant palier située côté stator (7a), et en ce que les surfaces formant paliers situées côté stator et côté arbre ont une forme tronconique et sont mobiles axialement l'une par rapport à l'autre, de telle sorte que l'interstice de paliers (9) entre les surfaces formant paliers (7a, 5a) est réglable et la pompe à engrenages est utilisable pour le transport de produits différents.
  4. Pompe à engrenages selon la revendication 3, caractérisée en ce que le mouvement relatif des surfaces d'étanchéité (5a, 7a) est en même temps celui des surfaces formant paliers (5a, 7a).
  5. Pompe à engrenages selon l'une des revendications 1 à 4, caractérisée en ce que le joint d'étanchéité (5a, 7a) ou le palier lisse (5a, 7a) est mis à l'atmosphère environnante unilatéralement.
  6. Pompe à engrenages selon la revendication 1 ou 5, caractérisée en ce que le joint d'étanchéité agit unilatéralement à l'encontre d'un palier de roulement pour l'arbre.
  7. Pompe à engrenages selon l'une des revendications 1 à 6, caractérisée en ce qu'une zone d'arbre qui est pourvue de la surface d'étanchéité située côté arbre (5a) et/ou de la surface formant palier située côté arbre (5a) est mobile axialement par rapport aux roues dentées (1) de la pompe.
  8. Pompe à engrenages selon l'une des revendications 1 à 7, caractérisée en ce qu'une zone de stator (3") qui est pourvue de la surface d'étanchéité située côté stator (7a) et/ou de la surface formant palier située côté stator (7a) est mobile axialement par rapport à un carter de pompe à engrenages.
  9. Pompe à engrenages selon l'une des revendications 1 à 8, caractérisée en ce qu'il est prévu entre des éléments mobiles axialement les uns par rapport aux autres, sur l'arbre et le stator avec les surfaces formant paliers et/ou les surfaces d'étanchéité respectives, des organes de réglage pour la position mutuelle.
  10. Pompe à engrenages selon l'une des revendications 1, 3 à 9, caractérisée en ce qu'il est prévu un dispositif formant capteur qui émet un signal (m ˙) attribué de façon univoque à la quantité de produit qui sort par le joint d'étanchéité (54), le signal est comparé à un signal de valeur théorique (W2) et la quantité sortante est réglée grâce à une intervention sur un organe de réglage (60) pour la position axiale relative des surfaces d'étanchéité.
  11. Pompe à engrenages selon l'une des revendications 1 à 10, caractérisée en ce qu'il est prévu un dispositif de mesure de température de palier (ϑ) et/ou un dispositif de mesure pour la pression différentielle (Δp) au-dessus de la pompe, et en ce qu'en fonction du signal ou des signaux de mesure, on agit sur un dispositif de réglage (58, 60) pour la position axiale relative des zones.
  12. Pompe à engrenages selon l'une des revendications 1, 3 à 11, caractérisée en ce qu'il est prévu un organe de réglage (45, 43) qui élargit axialement la surface d'étanchéité suivant une valeur prédéfinie, afin de dégager le joint d'étanchéité en vue d'un rinçage.
  13. Procédé pour rincer le joint d'étanchéité sur une pompe à engrenages selon l'une des revendications 1, 3 à 12, caractérisé en ce que les surfaces d'étanchéité (35a, 37a) sont éloignées l'une de l'autre grâce au déplacement axial, de telle sorte qu'un produit dont le passage est empêché par le joint d'étanchéité passe entre les surfaces d'étanchéité (35a, 37a) avec un courant de rinçage prédéfini.
EP94109865A 1994-06-26 1994-06-26 Pompe à engrenages Expired - Lifetime EP0620369B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59407028T DE59407028D1 (de) 1994-06-26 1994-06-26 Zahnradpumpe
AT94109865T ATE172006T1 (de) 1994-06-26 1994-06-26 Zahnradpumpe
EP94109865A EP0620369B1 (fr) 1994-06-26 1994-06-26 Pompe à engrenages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94109865A EP0620369B1 (fr) 1994-06-26 1994-06-26 Pompe à engrenages

Publications (3)

Publication Number Publication Date
EP0620369A2 EP0620369A2 (fr) 1994-10-19
EP0620369A3 EP0620369A3 (fr) 1995-01-25
EP0620369B1 true EP0620369B1 (fr) 1998-10-07

Family

ID=8216055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109865A Expired - Lifetime EP0620369B1 (fr) 1994-06-26 1994-06-26 Pompe à engrenages

Country Status (3)

Country Link
EP (1) EP0620369B1 (fr)
AT (1) ATE172006T1 (fr)
DE (1) DE59407028D1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575100A (en) * 1984-11-05 1986-03-11 The Dow Chemical Company Seal assembly which is hydraulically actuated

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB568724A (en) * 1943-01-14 1945-04-18 Alfred Rickenmann Improvements in or relating to bearings for spindles
DE2144707A1 (de) * 1971-09-07 1973-03-15 Erwin Junker Axial einstellbare spindellagerung fuer werkzeugmaschinen
DE2636024A1 (de) * 1976-08-11 1978-03-23 Hans Meyer Rotationskolbenmaschine mit kaemmverschluss als entspannungs-/verdichtungsmaschine mit kontinuierlich fortlaufender prozessfuehrung, sowie damit ausfuehrbare arbeitsprozesse zur energie-gewinnung, einsparung, -rueckgewinnung und -erzeugung
DE2846841A1 (de) * 1978-10-27 1980-05-08 Sauer Getriebe Kg Anordnung zur axialen positionierung des rotors einer hydraulischen veerdraengungsmaschine
DE3816537A1 (de) * 1988-05-14 1989-11-23 Bosch Gmbh Robert Zahnradpumpe
US5254893A (en) * 1992-01-30 1993-10-19 Ide Russell D Shaft support assembly for use in a polygon mirror drive motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575100A (en) * 1984-11-05 1986-03-11 The Dow Chemical Company Seal assembly which is hydraulically actuated

Also Published As

Publication number Publication date
EP0620369A3 (fr) 1995-01-25
ATE172006T1 (de) 1998-10-15
EP0620369A2 (fr) 1994-10-19
DE59407028D1 (de) 1998-11-12

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