EP0778417B1 - Pompe à engrenages - Google Patents

Pompe à engrenages Download PDF

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Publication number
EP0778417B1
EP0778417B1 EP19970104556 EP97104556A EP0778417B1 EP 0778417 B1 EP0778417 B1 EP 0778417B1 EP 19970104556 EP19970104556 EP 19970104556 EP 97104556 A EP97104556 A EP 97104556A EP 0778417 B1 EP0778417 B1 EP 0778417B1
Authority
EP
European Patent Office
Prior art keywords
gear pump
central axis
afa
zfa
pipe
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
EP19970104556
Other languages
German (de)
English (en)
Other versions
EP0778417A2 (fr
EP0778417A3 (fr
Inventor
Yves Lautenschlager
Peter Blume
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 EP19970104556 priority Critical patent/EP0778417B1/fr
Priority to DE59710244T priority patent/DE59710244D1/de
Publication of EP0778417A2 publication Critical patent/EP0778417A2/fr
Publication of EP0778417A3 publication Critical patent/EP0778417A3/fr
Application granted granted Critical
Publication of EP0778417B1 publication Critical patent/EP0778417B1/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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C2/086—Carter
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps 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
    • F04C2/18—Rotary-piston machines or pumps 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 similar tooth forms
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet

Definitions

  • the present invention relates to a gear pump according to the preamble of claim 1.
  • Gear pumps essentially consist of a pair equally large, interlocking gears that enclosed on all sides by a housing with a small gap become.
  • the gears sit on two mounted in the housing Waves, of which, for example, as a drive shaft through a shaft seal is guided to the outside.
  • the housing has on both sides of the meshing engagement ever one Opening for the inlet and outlet of the pumped medium, wherein the inlet opening with an inflow pipe and the Outlet opening is connected to a drain pipe.
  • the wheels will fill out the mesh Tooth gaps with the incoming fluid, then the Housing walls along the pressure side is brought. There, it pushes back into the gaps intervening Teeth of the gears and push it through the Outlet opening in the drainpipe.
  • the diameter of the inflow and Drainpipes are both limitations to that promoting medium as well by the before or after the pump to be adhered to flanges. So can For example, the so-called pump filling, under the Recording process of fluid in the released Tooth gaps of the gears is understood by the Characteristics of the fluid to be considerably more difficult. Around Such a pumping medium due difficult pumping It is conceivable that by enlarging the Diameter of the inflow pipe to remedy this problem can be done. At the same time, however, one must Adaptation to the inflow flange diameter, for example through a cone. To so-called Dead zones caused by little or no flow of the medium to be avoided can be avoided To form the cone relatively flat. adversely Such a solution leads to a significantly increased Production costs and a restriction of the Diameter adaptation by a not to be exceeded Inlet channel length at the inflow pipe.
  • the present invention is therefore the task to provide a gear pump, which the does not have the above-mentioned disadvantages.
  • the invention has the following advantages: extended central axis of inflow and / or outflow pipe an acute angle with the from the longitudinal axes of Cogs formed plane includes, the area is in the Area of the inlet opening and / or the outlet opening increased. This gives extra time in this area and additional space for receiving or delivering Pumped fluid available without the production cost for the gear pump is increased.
  • Fig. 1 shows a section through a known gear pump consisting of a housing G, two gears Z1 and Z2, an inflow pipe ZF and a drain pipe AF, wherein the Inflow pipe ZF and the drain pipe AF as a cylinder with a diameter DZ are formed.
  • the illustrated Cutting plane is on the one hand perpendicular to the both longitudinal axes A1 and A2 of the gears Z1 and Z2 and on the other hand comprises the central axes ZFA and AFA of the Inflow pipe ZF and the drain pipe AF.
  • a pumped medium M is via the inflow pipe ZF to a Entrance opening EO led where the vacant tooth spaces are filled with the inflowing medium M, the then brought along the housing walls on the pressure side becomes. There, they push back into the gaps meshing teeth of the gears and poke it through the gears Outlet opening AO in the drain pipe AF.
  • the inclusion of the pumped medium M in the Tooth gaps significantly by the properties of the Pumped medium M determines.
  • in Fig. 1 embodiment has already been the conical forming the inflow pipe ZF in the region of Inlet EO and also conical forming the Outlet pipe AF in the region of the outlet opening AO mentioned. This gives extra time in these areas for receiving or dispensing of medium M available, but at the expense of the aforementioned Disadvantage.
  • Fig. 2 is an inventive gear pump shown, again choosing the same view was as in Fig. 1.
  • the known and in Fig. 1 illustrated gear pump has over those in Fig. 2 illustrated gear pump following differences on:
  • One from the longitudinal axes A1 and A2 of the two gears Z1 and Z2 formed plane E concludes with the central axes ZFA the inflow pipe ZF an acute angle ⁇ , while the central axis AFA of the outflow pipe AFA with the plane E includes an acute angle ⁇ , wherein in the in Fig. 2 illustrated embodiment, the angle ⁇ and ⁇ equal are big.
  • Due to the inclination of the central axes ZFA and AFA opposite the plane E is preferably an offset of the center axes Make ZFA and AFA against a reference line RL, where the reference line RL is determined by the position of the central axes ZFA and AFA in a gear pump according to Fig. 1 - i. that is, when the angles ⁇ and ⁇ are equal to 90 ° - defined is.
  • the offset of the central axes ZFA and AFA depends on the angles ⁇ and ⁇ , wherein the offset is preferably such is set that the drainpipe AF and the Inlet pipe ZF symmetrical to the respective gears stand. This is achieved when the measure of offset from the symmetry of the inflow or outflow opening in height the tooth heads against the vertical through the Distance center between the two longitudinal axes A1 and A2 the plane E formed by the longitudinal axes A1 and A2 results.
  • Conceivable is a variant in which an offset the type described above is not provided.
  • a such inventive gear pump has the advantage on that the connections of the inflow pipe ZF and the Outflow pipe AF to the outside need not be adjusted.
  • angles ⁇ and ⁇ preferably between 30 ° and 60 °, wherein an angle of 45 ° is particularly suitable.
  • an angle of 45 ° is particularly suitable. In the latter Case is an area for the entrance or
  • Exit opening EO or AO which is 41% larger, as the surface according to the known embodiment Fig. 1.
  • Another embodiment of the invention is that the central axes ZFA and AFA neither parallel nor in run a line, but that the central axes ZFA and AFA are substantially perpendicular to each other. This additionally ensures that the pumped medium M is deflected by 90 °.
  • the made in this document Statements are analogous with respect to the angles ⁇ and ⁇ applicable.
  • both angles ⁇ and ⁇ are equal.
  • the values for the angles ⁇ and ⁇ are not the same but arbitrary - preferably each individually within the above range 30 ° to 60 ° - to get voted.

Landscapes

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

Claims (6)

  1. Pompe à engrenages, comprenant des roues dentées (Z1, Z2) avec des axes longitudinaux (A1, A2) pour refouler une matière (M), cette matière étant refoulée d'un tuyau d'amenée (ZF) à un tuyau de décharge (AF), le tuyau d'amenée (ZF) présentant un axe médiane (ZFA) qui inclut un angle aigu α avec le plan (E) définit par les axes longitudinaux (A1, A2) des roues dentées (Z1, Z2) et/ou ledit tuyau de décharge (AF) présentant un axe médiane (AFA) qui inclut un angle aigu β avec ledit plan (E), caractérisée en ce que les valeurs des angles α et/ou β se trouvent dans la gamme entre 30° et 60°.
  2. Pompe à engrenages selon la revendication 1, caractérisée en ce que les valeurs des angles α et/ou β sont égales à 45°.
  3. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que les angles α et/ou β sont égales.
  4. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que l'axe médiane (ZFA) du tuyau d'amenée (ZF) est essentiellement parallèle à l'axe médiane (AFA) du tuyau de décharge (AF).
  5. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que les axes médianes (ZFA, AFA) des tuyaux d'amenée et de décharge (ZF, AF) présentent un désaxé, ce désaxé étant choisi de manière telle que le tuyau de décharge (AF) et le tuyau d'amenée (ZF) soient symétriques par rapport aux roues dentées (Z1, Z2) respectives.
  6. Pompe à engrenages selon l'une des revendications 1 à 3, caractérisée en ce que l'axe médiane (ZFA) du tuyau d'amenée (ZF) est essentiellement perpendiculaire sur l'axe médiane (AFA) du tuyau de décharge (AF).
EP19970104556 1997-03-18 1997-03-18 Pompe à engrenages Expired - Lifetime EP0778417B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19970104556 EP0778417B1 (fr) 1997-03-18 1997-03-18 Pompe à engrenages
DE59710244T DE59710244D1 (de) 1997-03-18 1997-03-18 Zahnradpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19970104556 EP0778417B1 (fr) 1997-03-18 1997-03-18 Pompe à engrenages

Publications (3)

Publication Number Publication Date
EP0778417A2 EP0778417A2 (fr) 1997-06-11
EP0778417A3 EP0778417A3 (fr) 1997-10-01
EP0778417B1 true EP0778417B1 (fr) 2003-06-11

Family

ID=8226612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970104556 Expired - Lifetime EP0778417B1 (fr) 1997-03-18 1997-03-18 Pompe à engrenages

Country Status (2)

Country Link
EP (1) EP0778417B1 (fr)
DE (1) DE59710244D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3335855A1 (fr) * 2016-12-15 2018-06-20 Technische Universität München Pompe à roue dentée pour un matériau fondu, extrudeuse et procédé de fabrication de filaments

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE190361C (fr) *
US1928885A (en) * 1930-07-31 1933-10-03 Gamer Charles Pump
GB1095353A (en) * 1963-08-12 1967-12-13 Lucas Industries Ltd Gear pumps

Also Published As

Publication number Publication date
DE59710244D1 (de) 2003-07-17
EP0778417A2 (fr) 1997-06-11
EP0778417A3 (fr) 1997-10-01

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