EP0204136B1 - Maschine à piston radial à haute pression, avec des moyens pour retenir le patin à sa place - Google Patents

Maschine à piston radial à haute pression, avec des moyens pour retenir le patin à sa place Download PDF

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Publication number
EP0204136B1
EP0204136B1 EP86105814A EP86105814A EP0204136B1 EP 0204136 B1 EP0204136 B1 EP 0204136B1 EP 86105814 A EP86105814 A EP 86105814A EP 86105814 A EP86105814 A EP 86105814A EP 0204136 B1 EP0204136 B1 EP 0204136B1
Authority
EP
European Patent Office
Prior art keywords
piston
shoe
extensions
recess
working chamber
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
EP86105814A
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German (de)
English (en)
Other versions
EP0204136A1 (fr
Inventor
Karl Eickmann
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.)
Eickmann Karl
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE8686105814T priority Critical patent/DE3382625D1/de
Priority to AT86105814T priority patent/ATE81191T1/de
Priority to EP86105814A priority patent/EP0204136B1/fr
Publication of EP0204136A1 publication Critical patent/EP0204136A1/fr
Application granted granted Critical
Publication of EP0204136B1 publication Critical patent/EP0204136B1/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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms

Definitions

  • the invention relates to a radial piston unit with at least one pressure fluid chamber, through which fluid flows, periodically increasing and decreasing its volume, designed as a cylinder, with a reciprocable piston swiveling on the piston shoe, a stroke drive contacting the running surface of the piston shoe, and radial extensions on parts of the piston shoe.
  • the invention is therefore based on the object of making the known radial piston units reliable for higher pressures, securing the piston shoes against deflection and leaving their bed in the piston with a long piston stroke and keeping the piston long.
  • Figures 1 to 3 are longitudinal sections through parts of radial piston units in which means of the invention are arranged.
  • FIG. 4 is a cross section through FIG. 3 along the arrowed line AA of FIG. 3
  • FIG. 5 is a cross section along the arrowed line BB of FIG. 3
  • FIG. 6 shows the piston shoe of FIG. 4 shown separately in a view, seen from beyond FIG. 3
  • FIG. 7 shows the section through the piston shoe, as in FIG. 4, but only the piston shoe is shown in section in FIG. 7.
  • the respective piston 6 can be reciprocated along its axis 3 in the cylinder 2 arranged in the body 11.
  • the piston shoe 1 is arranged between the piston stroke drive 8, 108 and the piston 6 such that the piston shoe can pivot toward the piston.
  • the piston 6 has a bed 19 therefor and the piston shoe 1 has a swivel surface 18 therefor.
  • the bed 19 and the swivel surface 18 form surfaces with a common radius 17 around a common center 16. This ensures that it can be swiveled with a high load-bearing capacity because the surfaces can lie against each other, slide and bear forces.
  • the common center 16, which forms the root of the radius 17 of the surfaces 18 and 19, is also called the "pivot center" 16.
  • the pivot center 16 is located at the radial height 20 from the outermost extension of the piston 6.
  • the piston stroke drive is either an eccentric 8, as in FIGS. 1 to 2, or a ring 108, as in FIGS. 3 to 7.
  • the piston stroke drive has a piston stroke guide surface 9, on which the running surface 10 of the piston shoe slides. Between the surfaces 9 and 10 there is a relative movement 13 which can be directed forwards or backwards in a clockwise direction, as the direction arrows 13 indicate.
  • the direction of movement 13 is a relative direction of movement, because either the piston shoe runs on the stationary piston stroke guide surface 9 or the piston stroke guide surface 9 runs on the stationary race surface 10 of the piston shoe 1.
  • Lubrication fields or lubrication fluid lines 12 can be assigned to the piston or the piston shoe, or both.
  • the piston 6 itself or via a further piston 24 in a further cylinder 23 can draw fluid into the cylinder 2 or 23 via an inlet valve 26 and can eject it from the pressure fluid chamber in question via an outlet valve 27.
  • a spring 25 can be assigned to the piston to drive the inlet stroke and a space 28 can be used to allow connecting parts to move freely.
  • the piston shoe 1 has the radial extensions 21 at its ends seen in the direction of movement 13. In FIG. 2 these are so long that they reach the radial height 20 of the swivel center and there form the tips 22 at their outer ends. To accommodate it, the recess 7 is seen in the direction of movement 13, is formed in front of and behind the axis 3 of the cylinder 2 in the body 11 and is so deep that the tips 22 remain within the recess 7 at all times and at times the piston stroke path. Since the invention is to create a unit for very high pressures, the design of the pivot bearing 14, 15 or 18, 19 is of great importance. In FIG. 2, the common radius 17 of the swivel surfaces 18, 19 is therefore longer than the radius 33 of the piston 6.
  • the swivel surfaces 14, 15 and 18, 19 have only a small extent in the direction of the axis 3 of the piston and cylinder.
  • the axially parallel length of the extensions 21 of the piston shoe 1 is longer than the axially parallel length 35 of the pivot attachment 14, 15-18, 19 and the roots 36 of the extensions 21 are between them and the pivot surfaces forming the space 29 of the surfaces 14-15; -19 feet away.
  • the depth of the recess 7 in the body 11 is longer than the axially parallel length of the swivel surfaces 14, 15 and 18, 19.
  • the surfaces 14, 15 and 17, 18 are substantially perpendicular to the axis 3 of the piston and cylinder 6 and 2, then they are obtuse. If the radius 18 of the swivel bearing 18, 19 were comparable to the piston radius 33, then the radially outer parts of the swivel beds would be at an acute angle to the load and could then only bear slight forces.
  • the tips 22 can be arranged approximately at the height 20 of the swivel center 16, that the extensions 22 may have the length of the height 20 of the swivel center 16, and that the cylinder wall extension 5 extended from the body 11 into the recess 7 in the axial direction 3 of the piston 6 exceeds the parallel length of the pivot bearing 18, 19 or 14, 15.
  • the tips 22 should also protrude radially to the piston axis 3 beyond the extensions 21 in FIGS. 1 and 2, so that not the extensions 21, but only the tips 22 temporarily come into direct proximity to the wall 34 of the recess 7 during the pivoting movement of the piston shoe.
  • the swivel surfaces 14 are in the piston 6 and the surface 15 with radius 17 around the center 16 of the central part of the piston shoe 1 Recesses 29 which penetrate the piston shoe in its entire dimension parallel to the piston.
  • the piston guides 5 of the body 11 protrude into them.
  • the piston stroke drive in these figures is the ring 108 and the recesses 7 form from the radially outside into the body 11 because the ring 108 encompasses the body 11.
  • the extensions 31 not only enter into the recess 7, but past the recesses 29 perpendicular to the direction of movement 13, so that they form bridges or extensions 31 perpendicular to the direction of movement 13. At the ends of these extensions 31 there are the connecting webs 30 which connect the extensions 31 to one another.
  • FIGS. 5 and 7 clearly show the recess 129 penetrating the piston shoe and in FIG. 7 the position of the recess 29 in question between the central part and the extensions 31 can be seen.
  • the grooves 32 in FIG. 6 are separating grooves for dividing the functions of the Running surface 10. In FIGS. 3 and 4 one can still see the position of the piston shoe relative to the piston, to the recess 7 and to the body 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (6)

  1. Groupe à piston radial comprenant eu moins une chambre à fluide sous pression balayée par un fluide, augmentant et réduisant périodiquement son volume, conformée en cylindre et logeant un piston à mouvements alternatifs qui comporte une semelle par laquelle il est oscillant, ledit groupe comprenant par ailleurs une commande de course qui est en contact avec la surface de glissement de la semelle du piston, caractérisé en ce qu'une cavité (7) pénétrant dans le corps du cylindre (11) est réalisée pour le logement de pointes (22) servant d'arrêts, formées sur les prolongements (21) de la semelle (1) du piston qui sont à l'opposé des surfaces d'assise de l'oscillation (14-15, 18-19).
  2. Groupe selon la revendication 1, caractérisé en ce que les prolongements (21) sont disposés à l'extérieur de l'assise d'oscillation (18, 19) en inscrivant un angle droit à obtus avec la projection, parallèle à l'axe, du piston (6) et en formant une chambre 29.
  3. Groupe selon la revendication 2, caractérisé en ce que le corps du cylindre (11) forme un prolongement (5) de la paroi du cylindre qui pénètre dans la cavité (7), qui dépasse le longueur de l'assise de l'oscillation (18, 19) dans le direction de l'axe (3) du piston (6) et qui entre partiellement, au moins par intermittences, dans la chambre (29).
  4. Groupe selon la revendication 1, caractérisé en ce que lesdits prolongements forment une avancée dans les deux directions perpendiculaires à la direction du mouvement 13 de la surface de glissement 10 en formant ainsi des extensions (31) orientées latéralement, des entretoises (30) qui relient les extensions antérieure et arrière (31) étant disposées entre celles-ci aux extrémités des extensions (31), parallèlement à ladite direction de mouvement.
  5. Groupe selon la revendication 1, caractérisé en ce que la semelle du piston est traversée par une cavité (29, 129) qui est approximativement perpendiculaire à sa surface de glissement (10).
  6. Groupe selon la revendication 4, caractérisé en ce que les extensions (31) et les liaisons (30) forment ensemble un cadre de section éventuellement rectangulaire qui entoure les cavités (29, 129).
EP86105814A 1983-01-17 1983-01-17 Maschine à piston radial à haute pression, avec des moyens pour retenir le patin à sa place Expired - Lifetime EP0204136B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8686105814T DE3382625D1 (de) 1983-01-17 1983-01-17 Hochdruck-radialkolben-aggregat mit mitteln zum sichern des kolbenschuhs.
AT86105814T ATE81191T1 (de) 1983-01-17 1983-01-17 Hochdruck-radialkolben-aggregat mit mitteln zum sichern des kolbenschuhs.
EP86105814A EP0204136B1 (fr) 1983-01-17 1983-01-17 Maschine à piston radial à haute pression, avec des moyens pour retenir le patin à sa place

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86105814A EP0204136B1 (fr) 1983-01-17 1983-01-17 Maschine à piston radial à haute pression, avec des moyens pour retenir le patin à sa place

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP83100345.4 Division 1983-01-17

Publications (2)

Publication Number Publication Date
EP0204136A1 EP0204136A1 (fr) 1986-12-10
EP0204136B1 true EP0204136B1 (fr) 1992-09-30

Family

ID=8195089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105814A Expired - Lifetime EP0204136B1 (fr) 1983-01-17 1983-01-17 Maschine à piston radial à haute pression, avec des moyens pour retenir le patin à sa place

Country Status (3)

Country Link
EP (1) EP0204136B1 (fr)
AT (1) ATE81191T1 (fr)
DE (1) DE3382625D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19727249A1 (de) * 1996-07-01 1998-01-08 Rexroth Mannesmann Gmbh Vorrichtung zur Stabilisierung des Exzenterrings einer Radialkolbenpumpe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1377087A (en) * 1971-11-30 1974-12-11 Mcnamee A Compressible metallic bellows
DE2457025C2 (de) * 1974-05-14 1985-06-27 Karl Kanagawa Eickmann Radialkolbenmaschine mit Führung der Radialstützen der Kolbenschuhe
DE2921594A1 (de) * 1978-05-30 1980-02-28 Breinlich Richard Dr Neue anordnungen in hydrostatischen aggregaaten, insbesondere radialkolben- aggregaten und deren teilen
US4557347A (en) * 1981-07-14 1985-12-10 Karl Eickmann Fluid pumps, fluid motors and devices, wherein they are applied

Also Published As

Publication number Publication date
EP0204136A1 (fr) 1986-12-10
DE3382625D1 (de) 1992-11-05
ATE81191T1 (de) 1992-10-15

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