EP0772741A1 - Machine a engrenages a denture interieure - Google Patents

Machine a engrenages a denture interieure

Info

Publication number
EP0772741A1
EP0772741A1 EP96916164A EP96916164A EP0772741A1 EP 0772741 A1 EP0772741 A1 EP 0772741A1 EP 96916164 A EP96916164 A EP 96916164A EP 96916164 A EP96916164 A EP 96916164A EP 0772741 A1 EP0772741 A1 EP 0772741A1
Authority
EP
European Patent Office
Prior art keywords
stop pin
pinion
segments
geared wheel
internally geared
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.)
Withdrawn
Application number
EP96916164A
Other languages
German (de)
English (en)
Inventor
Franz Arbogast
Peter Peiz
Siegfried Eberhardt
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.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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 JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0772741A1 publication Critical patent/EP0772741A1/fr
Withdrawn legal-status Critical Current

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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members

Definitions

  • the invention relates to an internal gear machine (pump or motor) according to the preamble of claim 1.
  • the machines according to these publications each have a filler which is divided into two segments by a circumferentially extending gap, namely an inner segment and an outer segment.
  • the medium gets between the two segments during operation.
  • the pressure of the medium pushes the two segments apart, so that the inner segment is pressed against the tooth tips of the pinion and the outer segment against the tooth tips of the ring gear.
  • the pressure of the medium acts on the two segments of the filler from the pressure side, and tries to shift these two segments in the circumferential direction. Therefore the stop pin is necessary. It has a stop surface against which the filler (i.e. the two
  • Support segments with appropriate counter surfaces.
  • the filler its two segments - seen in the radial direction - are usually unevenly thick.
  • the outer segment can only be designed as a relatively thin shell, while the main part of the filler is formed by the inner segment
  • the inner segment can only be a thin shell and the outer segment represent the main part of the filler (see document (1), Figure 3).
  • the head signs have counter surfaces with which the segments bear against the stop surfaces of the stop pin, in the radial direction they have a different extent. For this reason, the forces exerted by each of the two segments on the stop pin are unequal in such cases.
  • the stop pin is freely rotatable about its own longitudinal axis. With a corresponding position of the segments relative to the longitudinal axis of the stop pin, one can
  • Pressing the segments against the tooth tips is desirable in order to seal the pressure chamber against the suction chamber of the machine.
  • turning the filler pin is always undesirable because, due to the large deflection of the filler tip, the removal is locally too strong.
  • the pressing of the segments against the tooth heads is, as said, necessary, but does not necessarily have to be achieved by turning the stop pin.
  • the pressurized parting plane between the segment parts when properly designed, has an excess force which causes the Filler piece parts are spread and a seal is made (without torque on the stop pin).
  • the filler pins move radially along the surface on the stop pin.
  • the invention has for its object to design a machine according to the preamble of claim 1 such that on the one hand the seal between the contact surfaces of the segments of the filler is sufficient in terms of an optimal seal, but on the other hand the wear is reduced even more than since then.
  • Circumferential direction can be prevented by making the stop pin non-rotatable. As mentioned above, the segments are pressed against the stop pin by the pressure of the medium from the machine's pressure chamber. If the stop pin cannot twist, this also leads to a fixation of the segments in the circumferential direction.
  • Segments can therefore only make a movement relative to one another in the radial direction, but not a relative movement in the circumferential direction.
  • a rotation of the stop pin and an associated contact with the pinion or ring gear has the disadvantage that the geometric shape of the segmerite part wears out from the tip.
  • FIG. 1 shows an internal gear pump according to the invention in a section perpendicular to the axis.
  • a housing 1 with an inlet 1.1 for supplying working medium and an outlet 1.2 for discharging working medium.
  • An externally toothed pinion 2 is rotatably mounted in the housing, as well as an internal ring gear 3 rotating therewith and internally toothed
  • Ring gear 3 a filler is provided.
  • This has an inner segment 4.1 and an outer segment 4.2.
  • the outer segment is designed as a relatively thin shell with an essentially constant wall thickness.
  • the two segments 4.1 and 4.2 are separated from one another by a gap 4.3 running in the circumferential direction.
  • the two segments 4.1 and 4.2 are separated from one another by a gap 4.3 running in the circumferential direction.
  • Segments 4.1 and 4.2 are supported against a stop pin 5 during operation.
  • a certain medium pressure prevails in the pressure space 6 of the working space of the machine. This acts on the segments 4.1, 4.2 through holes 3.1 in the ring gear 3. This pressure also prevails in the gap 4.3 between the two segments 4.1 and 4.2, so that there is a spreading of the two
  • Segments comes in, that is, to a mutual spreading apart radial direction.
  • the radially inner surface of segment 4.1 is thereby pressed against the tooth tips of pinion 2, and the radially outer surface of segment 4.2 against the tooth tips of ring gear 3. This causes the pressure chamber 6 to be sealed against the suction chamber 7.
  • Stop pin 5 has a stop surface 5.1.
  • the flat head surfaces of the two segments 4.1 and 4.2 are supported against the stop surface 5.1 of the stop pin 5.
  • stop pin 5 is rotatably mounted in the housing. He can therefore not twist about his own longitudinal axis. Since the two segments 4.1 and 4.2 are also acted upon in the circumferential direction by the pressure prevailing in the pressure chamber 6, they are pressed together against the stop surface 5.1 of the stop pin 5. For this reason, they cannot make any relative movement in the circumferential direction to one another when the machine is operating. This helps to reduce the wear between the segments 4.1, 4.2 on the one hand and the heads of pinion 2 or ring gear 3 on the other hand.
  • the stop pin should namely be movable there in order to allow a relative movement of the two segments in the circumferential direction.
  • FIGS. 2, 3 and 4 each show a section through part of the machine according to FIG. 1 in a greatly enlarged illustration.
  • the machine according to FIG. 1 in a greatly enlarged illustration.
  • stop pin 5 Cut made so that the longitudinal axis of the stop pin 5 lies in the cutting plane. You can also see stop pin 5 each a part of the cover 8 of the machine.
  • a clamping piece 9 is provided in the bearing cover 8.
  • a screw 10 is passed through a bore in the clamping piece 9 and screwed into the stop pin 5 such that the stop pin 5 is locked.
  • a screw 10 is passed through a washer 11 and screwed into a threaded bore of stop pin 5 and tightened. Locking of stop pin 5 is also achieved hereby.
  • the bearing cover 8 has a stepped bore 12.1, 12.2. By appropriate design of the stop pin 5, it is non-rotatable.

Abstract

L'invention concerne une machine à engrenages à denture intérieure (pompe ou moteur) comportant un pignon à denture extérieure, une couronne à denture intérieure entraînée en rotation avec le pignon, et une pièce intercalaire en forme de demi-croissant disposée entre le pignon et la couronne. Cette pièce intercalaire comprend un segment radialement intérieur qui coopère hermétiquement avec les sommets des dents du pignon, et un segment radialement extérieur qui coopère hermétiquement avec les sommets des dents de la couronne. Un axe de butée présente une surface de butée sur laquelle s'appuient les sommets des deux segments. L'invention est caractérisée en ce que cet axe de butée est solidaire en rotation.
EP96916164A 1995-05-26 1996-05-28 Machine a engrenages a denture interieure Withdrawn EP0772741A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19519307 1995-05-26
DE19519307 1995-05-26
PCT/EP1996/002285 WO1996037704A1 (fr) 1995-05-26 1996-05-28 Machine a engrenages a denture interieure

Publications (1)

Publication Number Publication Date
EP0772741A1 true EP0772741A1 (fr) 1997-05-14

Family

ID=7762900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96916164A Withdrawn EP0772741A1 (fr) 1995-05-26 1996-05-28 Machine a engrenages a denture interieure

Country Status (3)

Country Link
EP (1) EP0772741A1 (fr)
KR (1) KR970704969A (fr)
WO (1) WO1996037704A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6468866B2 (en) 1995-10-30 2002-10-22 Sgs-Thomson Microelectronics S.R.L. Single feature size MOS technology power device
US6548864B2 (en) 1995-10-30 2003-04-15 Sgs Thomson Microelectronics High density MOS technology power device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554960C2 (de) * 1975-12-06 1984-08-23 J.M. Voith Gmbh, 7920 Heidenheim Innenzahnradpumpe
DE2641278A1 (de) * 1976-09-14 1978-03-16 Voith Getriebe Kg Innenzahnradpumpe
DE4328733C1 (de) * 1993-08-26 1994-09-08 Voith Gmbh J M Innenzahnradpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9637704A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6468866B2 (en) 1995-10-30 2002-10-22 Sgs-Thomson Microelectronics S.R.L. Single feature size MOS technology power device
US6548864B2 (en) 1995-10-30 2003-04-15 Sgs Thomson Microelectronics High density MOS technology power device
US6566690B2 (en) 1995-10-30 2003-05-20 Sgs Thomson Microelectronics S.R.L. Single feature size MOS technology power device

Also Published As

Publication number Publication date
KR970704969A (ko) 1997-09-06
WO1996037704A1 (fr) 1996-11-28

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Legal Events

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Effective date: 19981201