EP0038482A2 - Annular piston machine - Google Patents

Annular piston machine Download PDF

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Publication number
EP0038482A2
EP0038482A2 EP81102706A EP81102706A EP0038482A2 EP 0038482 A2 EP0038482 A2 EP 0038482A2 EP 81102706 A EP81102706 A EP 81102706A EP 81102706 A EP81102706 A EP 81102706A EP 0038482 A2 EP0038482 A2 EP 0038482A2
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EP
European Patent Office
Prior art keywords
rotor
annular piston
ring
housing
teeth
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Withdrawn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
EP81102706A
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German (de)
French (fr)
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EP0038482A3 (en
Inventor
Johann Langmaier
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.)
Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19803013603 external-priority patent/DE3013603A1/en
Application filed by Individual filed Critical Individual
Publication of EP0038482A2 publication Critical patent/EP0038482A2/en
Publication of EP0038482A3 publication Critical patent/EP0038482A3/en
Withdrawn legal-status Critical Current

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    • 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
    • F04C2/103—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 one member having simultaneously a rotational movement about its own axis and an orbital movement

Definitions

  • the invention relates to an annular piston machine according to the preamble of patent claim 1.
  • the toothing between the housing ring and the ring piston consists of a pinion, in which the diameter of the recesses minus the diameter of the pin corresponds to twice the eccentricity.
  • the geometry of this pin toothing has the result that the point of engagement between the external toothing of the ring piston and the toothing of the housing ring and the moment transfer point between the toothed rotor and the ring piston enclose an angle of less than 90 ° with respect to the rotor axis.
  • the annular piston is supported on the non-torque-transmitting support sliding surface with the rotor with a disproportionately large force, which generates a friction force that reduces the torque and increases wear.
  • the object of the invention is therefore to increase the efficiency of the ring piston machine and to reduce the wear between the rotor and ring piston To reduce the supporting force between the rotor and the ring piston in the non-torque-transmitting sliding area.
  • annular piston machine in the form of a motor.
  • the motor housing consists of the motor head 1, the housing ring 2 and the bearing cover 3.
  • the motor shaft 5 is mounted on the one hand in the motor head and on the other hand in the bearing cover.
  • the rotor 4 is fixed in a rotationally fixed manner on the motor shaft by means of a spline toothing.
  • the housing ring is provided with an internal toothing 6, which is in swaying engagement with the external toothing 7 of the annular piston 8.
  • the control disk 9 which is provided with inlet and outlet control openings, is arranged. Lines 10 and 11 are provided for the supply and discharge of pressure medium.
  • suction and pressure spaces are formed between the toothings of the rotor and the annular piston 8, which are separated from one another approximately by the diameter line E - F and which are mutually separated on the one hand by the torque transmission point 12 and on the other hand by the sliding contact sealing point 13 are sealed.
  • the toothing of the housing ring and the annular piston are in engagement with one another in the area of the line E-F at the engagement point C.
  • the point of engagement C rotates according to the change in the suction and pressure chambers with the line E - F.
  • the torque transmission point 12 which is formed by the support point of the ring piston on the rotor, lies approximately on the opposite side of the point of engagement C and moves according to the tooth pitch of the Gear teeth of rotor and ring piston in the circumferential direction back and forth.
  • Who knows by hatching Lich made pressure chamber pressurizes the annular piston 8 on the lever arm 15, so that the supporting force acting in the torque transmission point 12 is effective for generating the torque on the rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

An annular piston machine has a toothed rotor, connected in a rotationally fixed manner to a shaft supported rotatably in a housing, and an annular piston, the number of teeth of which is one greater than that of the rotor, so that displacement chambers are formed between the teeth. Furthermore, inlet and outlet channels are provided in the housing or in the shaft, and discs and at least one control disc, provided with inlet and outlet control openings and abutting laterally on the rotor and the annular piston, and a housing annulus, having projections on its inner side, the centre line of which coincides with the centre axis of the rotor and on the inner side of which rolls the annular piston, provided with cut-outs on its outer side corresponding to the projections, and having built-in play, such that the centre axis of the annular piston describes a circular movement about the fixed centre axis of the rotor. In order to increase the efficiency of the annular piston machine and to reduce the supporting force between the rotor and the annular piston in the sliding region which is not used for transmitting torque in order to reduce the wear between the rotor and the annular piston, the projections on the housing annulus and the cut-outs in the annular piston are formed by involute or cycloid tooth systems and the point of engagement between the outer tooth system of the annular piston and the tooth system of the housing annulus and the torque transmission point between the toothed rotor and the annular piston are offset into the region of a diameter line separating the induction and compression chambers. <IMAGE>

Description

Die Erfindung betrifft eine Ringkolbenmaschine nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an annular piston machine according to the preamble of patent claim 1.

Bei einer aus der DE-OS 28 29 417 bekannten Ringkolbenmaschine dieser Art besteht die Verzahnung zwischen dem Gehäusering und dem Ringkolben aus einer Bolzenverzahnung, bei der der Durchmesser der Ausnehmungen abzüglich des Durchmessers der Bolzen dem Doppelten der Exzentrizität entspricht. Die Geometrie dieser Bolzenverzahnung hat zur Folge, daß der Eingriffspunkt zwischen der Außenverzahnung des Ringkolbens und der Verzahnung des Gehäuserings und der Momentübertragungspunkt zwischen dem verzahnten Rotor und dem Ringkolben bezogen auf die Rotorachse einen unter 90° liegenden Winkel miteinander einschließen. Infolgedessen stützt sich der Ringkolben auf der nicht der Momentübertragung dienenden Abstützungsgleitfläche mit dem Rotor mit einer unverhältnismäßig großen Kraft ab, die eine das Drehmoment verkleinernde und den Verschleiß erhöhende Reibungskraft erzeugt.In a ring piston machine of this type known from DE-OS 28 29 417, the toothing between the housing ring and the ring piston consists of a pinion, in which the diameter of the recesses minus the diameter of the pin corresponds to twice the eccentricity. The geometry of this pin toothing has the result that the point of engagement between the external toothing of the ring piston and the toothing of the housing ring and the moment transfer point between the toothed rotor and the ring piston enclose an angle of less than 90 ° with respect to the rotor axis. As a result, the annular piston is supported on the non-torque-transmitting support sliding surface with the rotor with a disproportionately large force, which generates a friction force that reduces the torque and increases wear.

Aufgabe der Erfindung ist es daher, zur Erhöhung des Wirkungsgrades der Ringkolbenmaschine und zur Verringerung des Verschleißes zwischen Rotor und Ringkolben die Abstützkraft zwischen Rotor und Ringkolben in dem nicht der Momentübertragung dienenden Gleitbereich zu verringern.The object of the invention is therefore to increase the efficiency of the ring piston machine and to reduce the wear between the rotor and ring piston To reduce the supporting force between the rotor and the ring piston in the non-torque-transmitting sliding area.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Durch das Verlegen des Eingriffspunkts zwischen der Außenverzahnung des Ringkolbens mit der Verzahnung des Gehäuserings auf die etwa gegenüberliegende Seite des Momentübertragungspunktes wird der zur Erzeugung des Drehmoments wirksame Hebelarm zwischen dem Drehmomentübertragungspunkt und dem Eingriffspunkt nahezu auf den Durchmesser des Ringkolbens vergrößert. Gleichzeitig verringert sich mit dieser Vergrößerung des Hebelarms die im Eingriffspunkt wirksame Tangentialkraft. Da mit der erfindungsgemäßen Verlagerung des Eingriffspunkts gleichzeitig auch die Richtung der Tangentialkraft geändert wird, verbleibt in dem Eingriffspunkt entsprechend dem Eingriffswinkel nur noch eine nahezu vernachlässigbare Radialkraft, die sich der Druckkraft zwischen dem Ringkolben und dem Rotor im Abdichtungsgleitbereich überlagert.According to the invention, this object is achieved by the characterizing features of patent claim 1. By moving the point of engagement between the external toothing of the ring piston with the toothing of the housing ring on the opposite side of the torque transmission point, the lever arm effective for generating the torque between the torque transmission point and the point of engagement is almost enlarged to the diameter of the ring piston. At the same time, this enlargement of the lever arm reduces the tangential force effective at the point of engagement. Since the direction of the tangential force is changed at the same time as the displacement of the engagement point according to the invention, only an almost negligible radial force remains in the engagement point, which is superimposed on the compressive force between the annular piston and the rotor in the sealing sliding area.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen näher beschrieben worden. Entsprechend der Wahl der Zähnezahl von Gehäusering und Ringkolben läßt sich das Übersetzungsverhältnis in weiten Bereichen variieren.Advantageous embodiments of the invention have been described in more detail in the subclaims. Depending on the choice of the number of teeth on the housing ring and the ring piston, the transmission ratio can be varied within wide ranges.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

  • Figur 1 einen Längsschnitt durch die Ringkolbenmaschine und
  • Figur 2 einen Schnitt durch die Ringkolbenmaschine längs der Linie II - II in Fig. 1.
An embodiment of the invention is explained below with reference to the drawing. In this shows
  • 1 shows a longitudinal section through the ring piston machine and
  • FIG. 2 shows a section through the ring piston machine along the line II-II in FIG. 1.

In der Zeichnung ist eine Ringkolbenmaschine in Form eines Motors dargestellt. Das Motorgehäuse besteht aus dem Motorkopf 1, dem Gehäusering 2 und dem Lagerdeckel 3. Die Motorwelle 5 ist einerseits im Motorkopf und andererseits in dem Lagerdeckel gelagert. Auf der Motorwelle ist durch eine Vielkeilverzahnung der Rotor 4 drehfest befestigt. Der Gehäusering ist mit einer Innenverzahnung 6 versehen, die mit der Außenverzahnung 7 des Ringkolbens 8 wankelnd im Eingriff steht. Zwischen dem Motorkopf 1 einerseits und dem Rotor 4 und dem Ringkolben 8 andererseits ist die mit Einlaß- und Auslaßsteueröffnungen versehene Steuerscheibe 9 angeordnet. Zur Zu- und Abführung von Druckmittel sind Leitungen 10 und 11 vorgesehen.In the drawing, an annular piston machine is shown in the form of a motor. The motor housing consists of the motor head 1, the housing ring 2 and the bearing cover 3. The motor shaft 5 is mounted on the one hand in the motor head and on the other hand in the bearing cover. The rotor 4 is fixed in a rotationally fixed manner on the motor shaft by means of a spline toothing. The housing ring is provided with an internal toothing 6, which is in swaying engagement with the external toothing 7 of the annular piston 8. Between the motor head 1 on the one hand and the rotor 4 and the annular piston 8 on the other hand, the control disk 9, which is provided with inlet and outlet control openings, is arranged. Lines 10 and 11 are provided for the supply and discharge of pressure medium.

Durch die Ein- und Auslaßsteueröffnungen der Steuerscheibe 9 werden zwischen den Verzahnungen des Rotors und des Ringkolbens 8 Saug- und Druckräume gebildet, die voneinander etwa durch die Durchmesserlinie E - F getrennt sind und die gegeneinander einerseits durch den Momentübertragungspunkt 12 und andererseits durch den Gleitberührungsabdichtungspunkt 13 abgedichtet sind. Die Verzahnungen von Gehäusering und Ringkolben befinden sich im Bereich der Linie E - F in dem Eingriffspunkt C miteinander im Eingriff. Der Eingriffspunkt C rotiert entsprechend der Veränderung der Saug- und Druckräume mit der Linie E - F. Der Drehmomentübertragungspunkt 12, der durch den Abstützpunkt des Ringkolbens an dem Rotor gebildet wird, liegt etwa auf der gegenüberliegenden Seite des Eingriffspunkts C und wandert entsprechend der Zahnteilung der Verzahnungen von Rotor und Ringkolben in Umfangsrichtung hin und her. Der durch Schraffur kenntlich gemachte Druckraum beaufschlagt den Ringkolben 8 an dem Hebelarm 15 mit Druck, so daß die in dem Drehmomentübertragungspunkt 12 wirkende Abstützkraft zur Erzeugung des Drehmoments an dem Rotor wirksam wird.Through the inlet and outlet control openings of the control disk 9, suction and pressure spaces are formed between the toothings of the rotor and the annular piston 8, which are separated from one another approximately by the diameter line E - F and which are mutually separated on the one hand by the torque transmission point 12 and on the other hand by the sliding contact sealing point 13 are sealed. The toothing of the housing ring and the annular piston are in engagement with one another in the area of the line E-F at the engagement point C. The point of engagement C rotates according to the change in the suction and pressure chambers with the line E - F. The torque transmission point 12, which is formed by the support point of the ring piston on the rotor, lies approximately on the opposite side of the point of engagement C and moves according to the tooth pitch of the Gear teeth of rotor and ring piston in the circumferential direction back and forth. Who knows by hatching Lich made pressure chamber pressurizes the annular piston 8 on the lever arm 15, so that the supporting force acting in the torque transmission point 12 is effective for generating the torque on the rotor.

Claims (3)

1. Ringkolbenmaschine mit einem mit einer in einem Gehäuse drehbar gelagerten Welle drehfest verbundenen verzahnten Rotor und einem Ringkolben, dessen Zähnezahl um einen Zahn größer ist als die des Rotors, so daß zwischen den Zähnen Verdrängungskammern gebildet sind, mit Zu- und Abflußkanälen in dem Gehäuse oder der Welle, mit Stirnscheiben und mindestens einer mit Einlaß- und Auslaßsteueröffnungen versehenen, an dem Rotor und dem Ringkolben seitlich anliegenden Steuerscheibe und mit einem auf seiner Innenseite Vorsprünge aufweisenden Gehäusering, dessen Mittellinie mit der Mittelachse des Rotors zusammenfällt und auf dessen Innenseite der von diesem mit Spiel eingefaßte und auf seiner Außenseite mit den Vorsprüngen entsprechenden Ausnehmungen versehene Ringkolben derart abrollt, daß dessen Mittelachse eine Kreisbewegung um die feststehende Mittelachse des Rotors beschreibt, dadurch gekennzeichnet, daß die Vorsprünge des Gehäuserings und die Ausnehmungen des Ringkolbens durch Evolventen- oder Zykloidenverzahnungen gebildet sind und daß der Eingriffspunkt zwischen der Außenverzahnung des Ringkolbens und der Verzahnung des Gehäuserings und der Momentübertragungspunkt zwischen dem verzahnten Rotor und dem Ringkolben im Bereich einer die Saug-und Druckräume trennenden Durchmesserlinie liegen.1. Ring piston machine with a rotatably connected in a housing rotatably mounted shaft toothed rotor and an annular piston, the number of teeth of which is one tooth larger than that of the rotor, so that displacement chambers are formed between the teeth, with inlet and outlet channels in the housing or the shaft, with end disks and at least one with inlet and outlet control openings, laterally adjacent to the rotor and the annular piston and with a control ring having projections on its inside, the center line of which coincides with the center axis of the rotor and on the inside of which the rotor ring piston edged with play and provided on its outside with the projections corresponding recesses rolls such that its central axis describes a circular movement about the fixed central axis of the rotor, characterized in that the projections of the housing ring and the recesses of the annular piston by involute N or cycloid toothings are formed and that the point of engagement between the external toothing of the ring piston and the toothing of the housing ring and the moment transfer point between the toothed rotor and the ring piston lie in the region of a diameter line separating the suction and pressure chambers. 2. Ringkolbenmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Zähnezahl der Außenverzahnung des Ringkolbens und des Gehäuserings gleich sind.2. Ring piston machine according to claim 1, characterized in that the number of teeth of the external teeth of the ring piston and the housing ring are the same. 3. Ringkolbenmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Zähnezahl der Außenverzahnung des Ringkolbens und des Gehäuserings ungleich sind.3. Ring piston machine according to claim 1, characterized in that the number of teeth of the external teeth of the ring piston and the housing ring are unequal.
EP81102706A 1980-04-09 1981-04-09 Annular piston machine Withdrawn EP0038482A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19803013603 DE3013603A1 (en) 1980-04-09 1980-04-09 Rotary fluid pump or motor - has internal-gear stator meshing with eccentric gear ring around trochoid rotor concentric in stator
DE3013603 1980-04-09
DE3049442 1980-12-30
DE3049442 1980-12-30

Publications (2)

Publication Number Publication Date
EP0038482A2 true EP0038482A2 (en) 1981-10-28
EP0038482A3 EP0038482A3 (en) 1982-02-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102706A Withdrawn EP0038482A3 (en) 1980-04-09 1981-04-09 Annular piston machine

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EP (1) EP0038482A3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342131A1 (en) * 1983-11-22 1985-06-05 Kinshofer, Alfred, Ing.(grad.), 8160 Miesbach Annular piston machine
US4666382A (en) * 1984-01-26 1987-05-19 Siegfried Eisenmann Hydrostatic gear ring machine
WO1997012123A1 (en) * 1995-09-28 1997-04-03 Danfoss A/S Hydraulic machine having axially joined lateral plates on both sides of gearwheel and gear ring, which plates move jointly with the gearwheel or the gear ring
WO1997012124A1 (en) * 1995-09-28 1997-04-03 Danfoss A/S Hydraulic machine having a gear ring which is divided radially into an inside inner part having the first internal toothing and an outside outer part having the second external toothing, which parts are rotatable relative to one another
EP1882855A2 (en) * 2006-07-25 2008-01-30 Kinshofer GmbH Hydraulic motor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989951A (en) * 1959-04-29 1961-06-27 Germane Corp Rotary fluid pressure device
DE1964978A1 (en) * 1969-07-14 1971-01-28 Trw Inc Hydraulic motor-pump working machine
DE2015897A1 (en) * 1970-04-03 1971-10-14 Zahnradfabnk Friednchshafen AG, 7990 Friedrichshafen Gear rotary piston machine
US3905727A (en) * 1971-07-28 1975-09-16 John B Kilmer Gerotor type fluid motor, pump or the like
USRE28933E (en) * 1966-07-11 1976-08-17 Gresen Manufacturing Company Hydraulic torque motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989951A (en) * 1959-04-29 1961-06-27 Germane Corp Rotary fluid pressure device
USRE28933E (en) * 1966-07-11 1976-08-17 Gresen Manufacturing Company Hydraulic torque motor
DE1964978A1 (en) * 1969-07-14 1971-01-28 Trw Inc Hydraulic motor-pump working machine
US3627454A (en) * 1969-07-14 1971-12-14 Trw Inc Hydraulic device
DE2015897A1 (en) * 1970-04-03 1971-10-14 Zahnradfabnk Friednchshafen AG, 7990 Friedrichshafen Gear rotary piston machine
US3905727A (en) * 1971-07-28 1975-09-16 John B Kilmer Gerotor type fluid motor, pump or the like

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342131A1 (en) * 1983-11-22 1985-06-05 Kinshofer, Alfred, Ing.(grad.), 8160 Miesbach Annular piston machine
US4666382A (en) * 1984-01-26 1987-05-19 Siegfried Eisenmann Hydrostatic gear ring machine
WO1997012123A1 (en) * 1995-09-28 1997-04-03 Danfoss A/S Hydraulic machine having axially joined lateral plates on both sides of gearwheel and gear ring, which plates move jointly with the gearwheel or the gear ring
DE19536060A1 (en) * 1995-09-28 1997-04-03 Danfoss As Hydraulic machine
WO1997012124A1 (en) * 1995-09-28 1997-04-03 Danfoss A/S Hydraulic machine having a gear ring which is divided radially into an inside inner part having the first internal toothing and an outside outer part having the second external toothing, which parts are rotatable relative to one another
DE19536061A1 (en) * 1995-09-28 1997-04-03 Danfoss As Hydraulic machine
DE19536060C2 (en) * 1995-09-28 1998-06-18 Danfoss As Hydraulic machine
EP1882855A2 (en) * 2006-07-25 2008-01-30 Kinshofer GmbH Hydraulic motor
EP1882855A3 (en) * 2006-07-25 2008-04-30 Kinshofer GmbH Hydraulic motor

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Publication number Publication date
EP0038482A3 (en) 1982-02-03

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Inventor name: LANGMAIER, JOHANN