EP0818605B1 - Machine rotative - Google Patents

Machine rotative Download PDF

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Publication number
EP0818605B1
EP0818605B1 EP97110513A EP97110513A EP0818605B1 EP 0818605 B1 EP0818605 B1 EP 0818605B1 EP 97110513 A EP97110513 A EP 97110513A EP 97110513 A EP97110513 A EP 97110513A EP 0818605 B1 EP0818605 B1 EP 0818605B1
Authority
EP
European Patent Office
Prior art keywords
rotary piston
chamber
slide
engine according
piston engine
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
EP97110513A
Other languages
German (de)
English (en)
Other versions
EP0818605A2 (fr
EP0818605A3 (fr
Inventor
Richard Landgraf
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
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0818605A2 publication Critical patent/EP0818605A2/fr
Publication of EP0818605A3 publication Critical patent/EP0818605A3/fr
Application granted granted Critical
Publication of EP0818605B1 publication Critical patent/EP0818605B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/356—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F01C1/3562—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation

Definitions

  • the invention relates to a rotary piston machine with a housing, in which a cylindrical chamber is formed, one Circular piston, which on a in the longitudinal axis of the chamber Shaft is rotatably mounted eccentrically, one in Housing mounted, essentially in a the longitudinal axis enclosing plane reciprocating slide, the with a sealing surface on the outer surface of the rotary piston pressurized rests and the space between the inner peripheral surface the chamber and lateral surface of the rotary piston in sealingly divides a receiving and a dispensing chamber, and with a supply channel or an outlet channel for supplying medium to the receiving chamber or to discharge the medium from the Dispensing chamber if the lateral surface of the Rotary piston on the cylindrical peripheral surface of the chamber is applied.
  • Such a rotary piston machine designed as a rotary piston pump is known from DE 29 14 527 C2.
  • the Slider of the known rotary piston machine is in pressure contact with the outer surface of the rotary piston and touches it with an elongated surface which is a generatrix of the Rotary piston contains. Because of the eccentricity of the rotary piston arises between the outer surface of the rotary piston and the contact surface of the slide has a relative movement, when the rotary piston rolls over this contact surface. This creates wear on the sealing surface of the slide and on the jacket of the rotary piston, which seals between Admission and delivery chamber impaired. It also arises due to the linear contact surface between the slide and lateral surface of the rotary piston a high surface pressure, the further increases wear.
  • a rotary piston machine is known from DE 44 18 262 A1, where the slide as an additional part is a sealing element contains which is pivotable in a recess of the slide is stored.
  • the sealing element has a sealing surface on the circumferential surface of the rotary piston rests.
  • the input or output shaft of the rotary piston rolls the outer surface of the rotary piston on the cylindrical peripheral surface the chamber. Accordingly, there is also a relative movement between the sealing surface of the sealing element and the circumferential surface of the rotary piston.
  • the rolling friction between the inner peripheral surface of the chamber and the outer surface of the Rotary piston and between the latter and the sealing surface of the Sealing element leads to wear, which is the serviceability the rotary piston machine is reduced.
  • This task is for the rotary piston machine mentioned at the beginning solved in that the sealing surface on the slide a is a flat surface that slides on a flat counter surface abuts, which is formed on the outer surface of the rotary piston is.
  • the flat sealing surface and the flat counter surface can by conventional machine tools manufactured with the highest precision become. Accordingly, there is a high tightness between Admission and distribution chamber. Because the two plan areas if they are loaded with one another, they will roll the circumferential surface of the rotary piston on the cylindrical peripheral surface the chamber prevented. Rather, the outer surface of the rotary piston when the shaft rotates against the peripheral surface pressed the chamber, corresponding to each other Locations of the peripheral surface and the outer surface at every turn of the shaft approach each other, then in contact get and move away from each other. Also there is a rolling movement between the sealing surface and the counter surface avoided. So there is wear due to rolling friction significantly reduced in the chamber and on the slide and thus the efficiency of the rotary piston machine and its reliability improved.
  • the sealing surface of the slide is located on the counter surface of the rotary piston facing her, whereby there is a large contact area. Based on these large contact area is also with high force application generates only a low surface pressure, which creates a high Tightness is achieved at high pressures and yet the Wear is low.
  • the rotary piston machine according to the invention can be used as a pump, Compressor or used as a drive motor. by virtue of the reduced load on the sealing surface of the slide can the working pressures and also the working temperatures be high without fear of high wear. Also the rotary piston machine can improve the tightness have high torques at low speeds.
  • Figures 1, 2 and 3 show a rotary piston machine according to of the invention, which works as a drive motor.
  • Figure 1 shows the rotary piston machine in a view from direction A according Figure 2 seen.
  • the rotary piston machine has a medium one Plate 10 with a circular opening, the chamber 11th forms.
  • a rotary piston 12 In the chamber 11 is a rotary piston 12 on an eccentric Crank 13 rotatably supported by a shaft 14.
  • the rotary piston 12, the side against side plates 22 and 23 lies sealingly, has on its outer surface a flat, which a flat counter surface 16a for forms the flat sealing surface 16b of a slide 17.
  • the Slider 17 is slidable in a recess 21 of the plate 10 and stored sealed.
  • the slide 17 also has a recess 19, which acts as an inlet valve for the working media serves in the chamber 11.
  • the plate 10 also has one Feed channel 24 and an outlet channel 25. Via the feed channel 24, the working medium is supplied to the chamber 11 and after delivering its energy content to work through the outlet duct 25 removed again.
  • Figure 2 shows a cross section along the line B-B of Figure 1.
  • the slide 17, the rotary piston 12 and the shaft 14 contain a channel system 18 which lubricant 26 on distributed several sliding surfaces.
  • a supply of lubricant 26 is arranged above the slide 17 and is gas pressure P applied.
  • Figure 3 shows a cross section along the line C-C of Figure 1. It is the structure of the feed channel 24, the recess 19 in the slide 17 and its function as a valve and the outlet channel 25 visible.
  • the feed channel 24 serves as Combustion chamber, whereby compressed air is supplied from the outside.
  • the resulting in the combustion in the combustion chamber 24 Expansion gases are via the recess acting as a valve 19 and with the corresponding position of the slide 17 in the work area the chamber 11 passed. Relax these expansion gases themselves and indicate their energy content as filming the rotary piston 12.
  • Figure 4 shows the rotary piston machine according to the invention as Compressor.
  • the same parts as in the previous figures are called the same.
  • the view shown in Figure 4 corresponds from view A according to FIG. 2.
  • the rotary piston machine as The compressor is similar to the rotary piston machine described in FIG. 1 as a drive motor. Deviations are that the direction of rotation according to arrow P2 opposite the direction of rotation according to arrow P1.
  • the rotary piston machine as a compressor has a feed channel 27 and a discharge channel 29 for the condensed medium.
  • the discharge channel 29 contains a valve V1, the structure of which is mentioned in the already mentioned patent application DE 195 17 451 is described in detail.
  • Another difference relates to the slide 17, which has no recess 19 contains, since such a valve is not required.
  • FIG. 4 shows the rotary piston machine in a rotating phase of 270 °.
  • the receiving chamber 11a Medium flowed in via the feed channel 27, while the in a medium previously flowed in the dispensing chamber 11b has been compressed. If the medium is overpressured in the discharge chamber 11b with respect to the pressure in the discharge channel 29 opens valve V1 so that the medium flows out.
  • the state of the rotary piston 12 is the eccentricity E in with respect to the longitudinal axis L.
  • FIG. 5 shows the rotary piston machine according to FIG. 4 in cross section along the line D-D.
  • the feed channel is clearly visible 27, the slide 17, the outlet valve V1 and the outlet channel 29th
  • the rotary piston machine according to Figures 4 and 5 5 can be as Compressors for the drive motor according to FIG. 1 are used, the combustion chamber air flowing in the outlet duct 28 24 of the drive motor is supplied.
  • the rotary piston machine described can be in a rotary piston device used, essentially two contains similar rotary piston machines.
  • the work phases of the two rotary piston machines are 180 ° against each other postponed.
  • Such a rotary piston device is in the DE 195 17 451 described in detail.
  • the Rotary piston machine according to the present invention also in two-stage arrangements are used, as well as these in the aforementioned patent application by the same applicant of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (9)

  1. Machine à piston rotatif, comportant
    un boítier dans lequel est ménagée une chambre cylindrique (11),
    un piston rotatif (12) qui est monté excentriquement à rotation sur un arbre (14) s'étendant selon l'axe longitudinal (L) de la chambre (11),
    un coulisseau (17) monté dans le boítier en étant mobile alternativement sensiblement dans un plan contenant l'axe longitudinal (L), lequel coulisseau présente une surface d'étanchéité (16b) appuyant en force sur la surface d'enveloppe du piston rotatif (12), et divise de façon étanche l'espace entre une surface périphérique interne de la chambre (11) et la surface d'enveloppe du piston rotatif (12) en une chambre d'admission et une chambre d'évacuation (11a ou 11b), et
    un canal d'amenée (24, 27) ou un canal d'évacuation (25, 29), pour amener un médium à la chambre d'admission (11a) ou pour évacuer le médium de la chambre d'évacuation (11b) lorsque la surface d'enveloppe du piston rotatif appuie contre la surface périphérique cylindrique de la chambre (11) quand l'arbre (14) est en rotation,
    caractérisée en ce que la surface d'étanchéité (16b) au niveau du coulisseau (17) est une surface plane qui appuie à glissement contre une surface plane opposée (16a) qui est conformée sur la surface d'enveloppe du piston rotatif (12).
  2. Machine à piston rotatif selon la revendication 1, caractérisée en ce que la surface d'étanchéité (16b) et la surface opposée (16a) sont agencées sensiblement perpendiculairement à l'axe longitudinal du coulisseau.
  3. Machine à piston rotatif selon la revendication 1 ou 2 caractérisée en ce que la surface d'étanchéité (16b) et la surface opposée (16a) sont de même dimension et de forme rectangulaire ou carrée, en ce que la largeur de la forme rectangulaire est égale à la largeur du piston rotatif (12), et en ce que la longueur de la forme rectangulaire est égale à une valeur comprise entre 1/10 et 5/10 du diamètre du piston rotatif (12), en étant cependant au moins égale à 5 mm.
  4. Machine à piston rotatif selon la revendication 3, caractérisée en ce que la longueur de la forme rectangulaire est égale à une valeur comprise entre 0,2 et 0,35 fois le diamètre du piston rotatif (12).
  5. Machine à piston rotatif selon l'une des revendications précédentes, caractérisée en ce que le coulisseau (17) est poussé avec une force prédéterminée, de préférence par un ressort, un piston plongeur pneumatique ou un piston plongeur hydraulique, contre la surface opposée (16a) du piston rotatif (12).
  6. Machine à piston rotatif selon l'une des revendications précédentes, caractérisée en ce que le coulisseau (17) et le piston rotatif (12) comportent un système de canaux (18) permettant d'alimenter en agent lubrifiant les surfaces de coulissement de la machine à piston rotatif.
  7. Machine à piston rotatif selon la revendication 6, caractérisée en ce que le piston rotatif comporte des alésages s'étendant de la surface opposée (16a) à la surface de manivelle et/ou aux surfaces latérales de la chambre (11), permettant d'alimenter en agent lubrifiant les surfaces de coulissement.
  8. Machine à piston rotatif selon l'une des revendications précédentes, caractérisée en ce que la surface périphérique interne de la chambre (11) et/ou les surfaces latérales de la chambre cylindrique sont polies et/ou sont revêtues d'une couche anti-abrasive au moins dans la région qui est en contact avec l'enveloppe du piston rotatif, le revêtement étant de préférence réalisé par un procédé CVD activé au plasma employant du carbone superdur modifié.
  9. Machine à piston rotatif selon l'une des revendications précédentes, caractérisée en ce qu'au moins une des pièces suivantes, à savoir la plaque médiane (10), les plaques latérales (22, 23), le coulisseau (17), le piston rotatif (12), la manivelle (13) ainsi que l'arbre (14), ou toutes lesdites pièces sont fabriquées à partir de céramique, de préférence à partir d'oxyde d'aluminium, de carbure de silicium ou de nitrure de silicium.
EP97110513A 1996-07-08 1997-06-26 Machine rotative Expired - Lifetime EP0818605B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627501 1996-07-08
DE19627501A DE19627501A1 (de) 1996-07-08 1996-07-08 Kreiskolbenmaschine

Publications (3)

Publication Number Publication Date
EP0818605A2 EP0818605A2 (fr) 1998-01-14
EP0818605A3 EP0818605A3 (fr) 1998-09-09
EP0818605B1 true EP0818605B1 (fr) 2002-05-08

Family

ID=7799257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97110513A Expired - Lifetime EP0818605B1 (fr) 1996-07-08 1997-06-26 Machine rotative

Country Status (3)

Country Link
EP (1) EP0818605B1 (fr)
AT (1) ATE217387T1 (fr)
DE (2) DE19627501A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009047153A1 (de) * 2009-11-25 2011-05-26 Sgl Carbon Se Pumpe mit oder aus einem C/SiC-Material und Verwendung von C/SiC-Materialien bei Pumpen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635553A (en) * 1947-07-18 1953-04-21 Economy Faucet Company Liquid pump
GB632414A (en) * 1947-08-27 1949-11-28 Charles Scott Prendergast Improvements relating to rotary pumps and motors
DE815371C (de) * 1949-03-29 1951-10-01 Hugo Heinrich Rollkolbenmaschine mit sichelfoermigem Arbeitsraum
DE1628125A1 (de) * 1967-02-22 1970-08-20 Willy Minnich OEldruckmotor
US4280798A (en) * 1979-01-24 1981-07-28 Gurley James R Work machine

Also Published As

Publication number Publication date
EP0818605A2 (fr) 1998-01-14
EP0818605A3 (fr) 1998-09-09
DE19627501A1 (de) 1998-01-15
DE59707193D1 (de) 2002-06-13
ATE217387T1 (de) 2002-05-15

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