EP0632204B1 - Schwenkkolben für einen Drehantrieb - Google Patents

Schwenkkolben für einen Drehantrieb Download PDF

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Publication number
EP0632204B1
EP0632204B1 EP94105748A EP94105748A EP0632204B1 EP 0632204 B1 EP0632204 B1 EP 0632204B1 EP 94105748 A EP94105748 A EP 94105748A EP 94105748 A EP94105748 A EP 94105748A EP 0632204 B1 EP0632204 B1 EP 0632204B1
Authority
EP
European Patent Office
Prior art keywords
seal
housing
rotary piston
axial
radially
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
EP94105748A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0632204A1 (de
Inventor
Wagner Albrecht
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP0632204A1 publication Critical patent/EP0632204A1/de
Application granted granted Critical
Publication of EP0632204B1 publication Critical patent/EP0632204B1/de
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
    • F04C9/00—Oscillating-piston machines or pumps
    • F04C9/002—Oscillating-piston machines or pumps the piston oscillating around a fixed axis

Definitions

  • JP 4-13804 U has already proposed to integrate a grease ash in the axial seal in the area of the wing, so that the running surface of the axial seal is regularly wetted with lubricant.
  • this solution has the disadvantage that only those areas that are swept by the wing are continuously relubricated. If the actual swivel angle is less than the maximum possible, for example caused by an adjusting device as described in DE 39 41 255 A1, a large part of the axial seal continues to run dry.
  • each seal section benefits from lubrication, regardless of the actual swivel angle of the swivel piston. Because of the radial overlap of the gaps between the seals, the mating surface on the housing side is wetted with lubricant over the entire radial width of the axial seal, which in turn guarantees that the axial seal also always runs on a lubricating film over its entire radial width. It is always ensure an optimal seal between the radial outer and inner areas of the axial seal, since the meandering shape continues to form a continuous axial seal that is closed in a ring-like manner.
  • the radially outer sealing gaps are preferably open radially outwards so that they communicate with the housing space receiving the pivoting piston when the pivoting piston is ready for use.
  • this housing space is supplied with pressure medium, which consequently also has access to the outer seal interstices.
  • pressure medium which consequently also has access to the outer seal interstices.
  • it is hydraulic pressure medium, the same serves directly as a lubricant, which flows to the relevant sections of the housing-side counter surface via the outer seal interstices reached.
  • the rotary drive is operated with pneumatic pressure medium, the lubrication effect is based on the fact that this pressure medium is regularly enriched with lubricant which has a corresponding lubricating effect. As a rule, the rotary drive is operated with compressed air to which small amounts of oil are added.
  • the pivoting piston 1 In order to separate the working spaces 16, 17 marked on both sides of the pivoting piston 1 in a fluid-tight manner from one another, the pivoting piston 1 carries a sealing arrangement 18 which, when ready for use, bears against the inner surface of the housing space 8 and sweeps along it during the pivoting process.
  • the sealing arrangement 18 includes, for example, a wing seal 19 arranged on the wing 3, which extends continuously along the two axial sides and the end face facing away from the bearing part 2. In the area of its two end sections 23 facing the bearing section 2, the wing seal 19 goes into an axial seal 24, 24 'in each case About, one of which is provided in the area of one of the two end or axial sides of the bearing section 2.
  • the two axial seals 24, 24 ' are designed to be closed in a ring-like manner and each run along a circular line 25 indicated by dash-dotted lines, which has the axis of rotation 7 to the center.
  • the axial seals 24, 24 'and the bearing section 2 are arranged coaxially to one another. Seen in the top view of the pivoting piston 1 in the direction of the axis of rotation 7 (view in the direction of the arrow 26), the opening 14 and the possibly introduced output shaft 12 are continuously surrounded radially on the outside by the axial seals 24, 24 '.
  • the counter-sealing surface 34 is indicated by dash-dotted lines in the figures, it runs coaxially with the respectively assigned housing opening 13, 13 '. In this way, pressure medium is prevented from escaping from the housing space 8 through the housing openings 13, 13 '.
  • special measures have been taken which contribute to protecting the axial seals 24, 24'. They are explained below on the basis of the one axial seal 24, but are expediently also found identically on the opposite axial seal 24 '.
  • the counter-sealing surface 34 is coated with lubricant over its entire radial width. Because of the large number of sealing gaps 37, 38, the counter-sealing surface 34 is constantly kept under lubrication along its entire circumference, even if the pivoting angle of the pivoting piston 1 is relatively small.
  • wing seal 19 it has a central longitudinal recess 49 into which 1 lubricant can be filled before the pivoting piston is installed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Sealing Devices (AREA)
EP94105748A 1993-05-29 1994-04-14 Schwenkkolben für einen Drehantrieb Expired - Lifetime EP0632204B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4318041A DE4318041A1 (de) 1993-05-29 1993-05-29 Schwenkkolben für einen Drehantrieb
DE4318041 1993-05-29

Publications (2)

Publication Number Publication Date
EP0632204A1 EP0632204A1 (de) 1995-01-04
EP0632204B1 true EP0632204B1 (de) 1997-08-20

Family

ID=6489276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105748A Expired - Lifetime EP0632204B1 (de) 1993-05-29 1994-04-14 Schwenkkolben für einen Drehantrieb

Country Status (4)

Country Link
EP (1) EP0632204B1 (hu)
KR (1) KR100295596B1 (hu)
DE (2) DE4318041A1 (hu)
HU (1) HU221073B1 (hu)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102410177B (zh) * 2011-09-16 2014-06-04 刘大磊 一种具有漏液装置的摆筒式容积泵

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB969562A (en) * 1962-11-15 1964-09-09 Thompson Ramo Woolridge Inc Improvements in or relating to oscillatory vane members and sealing means therefor
DE2905193A1 (de) * 1979-02-12 1980-08-21 Rogatti Fa Harri Druckmittelbetaetigter drehantrieb
EP0136492B1 (de) * 1983-08-31 1987-03-04 Festo KG Schwenkkolbenmotor
DE3437608A1 (de) * 1984-10-13 1986-04-24 Festo KG, 7300 Esslingen Schwenkkolbenmotor

Also Published As

Publication number Publication date
DE4318041A1 (de) 1994-12-01
EP0632204A1 (de) 1995-01-04
HU9401607D0 (en) 1994-09-28
HU221073B1 (hu) 2002-07-29
KR100295596B1 (ko) 2001-10-24
HUH3821A (en) 1997-06-30
DE59403772D1 (de) 1997-09-25

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