EP2107254A2 - Vérin rotatif - Google Patents

Vérin rotatif Download PDF

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Publication number
EP2107254A2
EP2107254A2 EP09155990A EP09155990A EP2107254A2 EP 2107254 A2 EP2107254 A2 EP 2107254A2 EP 09155990 A EP09155990 A EP 09155990A EP 09155990 A EP09155990 A EP 09155990A EP 2107254 A2 EP2107254 A2 EP 2107254A2
Authority
EP
European Patent Office
Prior art keywords
seal
annular spaces
cylinder
pressure
motor according
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Withdrawn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
EP09155990A
Other languages
German (de)
English (en)
Other versions
EP2107254A3 (fr
Inventor
Rainer Beilner
Matthias Reuss
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP2107254A2 publication Critical patent/EP2107254A2/fr
Publication of EP2107254A3 publication Critical patent/EP2107254A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type

Definitions

  • the generic DE 10 2004 032 747 A1 describes a swivel motor comprising a cylinder filled with a pressure medium with at least one rib on its inner wall, wherein within the cylinder a motor shaft is pivotally mounted with at least one wing, wherein within at least two annular spaces between the cylinder and the motor shaft is a druckvorspannbare seal arrangement, which, together with disc seals within the wings and the ribs, seals a working chamber formed by the cylinder with the rib and the motor shaft and the vane together with end lids of the cylinder, the annular spaces being interconnected via a pressure equalizing channel.
  • the purpose of the pressure compensation channel is that can accumulate in the annular spaces for the seal assemblies no pressure medium with different pressure levels, which generate a longitudinal force between the cylinder and the motor shaft.
  • Object of the present invention is to achieve an optimum sealing effect of a window seal.
  • each disc seal is connected within the grooves in the wings and the ribs with two annular spaces
  • the pressure equalization connection is not only used to reduce unilaterally acting pressure pads in one of the annular spaces, but also the targeted pressure bias of all disc seals.
  • the pressure equalization channel is formed by a groove running in the longitudinal direction of the disk seal. It is possible to let the pressure equalization channel over the entire length of the disk seal, so that there is a direct connection of the disk seal to the said annular spaces for the annular seal assemblies.
  • annular spaces for the seal assembly are connected via each at least one branch channel with all grooves for the disc seals.
  • the possibility of pressure reduction from the pressure equalization channel is promoted by the pressure equalization channel is formed by a circumferential groove of the disc seal between the annular spaces.
  • the pressurized medium from the annular spaces can flow off in the direction of the dynamic sealing surface via the pressure compensation channel which is also present in the end faces of the window seal and can continue to escape into a working space.
  • the disc seal is made of an annular sealing body in conjunction with a core piece, wherein the sealing body has at least one connecting opening between its outer and its inner wall and a gap between the disc seal and a supplement is connected to the connection opening, so that the gap forms the pressure equalization channel together with the connection opening.
  • the advantage of this embodiment is that only a very short pressure equalization channel must be formed in the sealing body. The largest part of the pressure equalization channel results from the said gap.
  • connection opening in the contact region of the window seal is designed with a lid.
  • the Fig. 1 shows an assembly in the design of a swing motor 1 in a longitudinal sectional view with a cylinder 3, in which a motor shaft 5 rotatably mounted is. With the cylinder 3 end lid 7 and 9 are welded. On the inner wall 11 of the cylinder 3 are two ribs 13 (FIG. Fig. 2 ) arranged with wings 15 of the motor shaft 5, the cylinder 3 and the covers 7; 9 four working chambers 17; Form 19, wherein working chambers with the same reference numeral via a pressure medium distribution system starting from hydraulic ports 21; 23 and transverse channels 25; 27 are interconnected within the motor shaft. The number of working chambers depends on the torque to be applied and on the required swivel angle of the slewing motor.
  • seals 31; 33 inserted in the design of disc seals, each of which separate adjacent working chambers.
  • Both covers 7; 9 form together with the motor shaft 5 annular spaces 37; 39, the seal assemblies 41; 43 for sealing the working chambers 17; 19 record.
  • pressurizing a common group of working chambers, e.g. B. 17 and a relatively smaller pressure in the working chambers 19 is a very low flow of oil into the annular spaces 37; Pressed 39, as set by the different pressure from the working chambers in the circumferential direction a slight deformation of the seal assembly and thus pressure medium from the working chambers 17 at a high pressure in the annular spaces 37, 39 penetrates.
  • the pressure medium volume occurring in particular at low working chamber pressures after high pressure phases are comparatively very small, but it could happen that z. B.
  • the pressure equalization channel is at least part of the length of the disk seals 31; 33 formed, which are arranged in a groove of the wing and / or the rib.
  • the pressure equalization channel is formed by a groove running in the longitudinal direction of the disk seal.
  • the annular spaces 37; 39 via branch channels 47; 49 connected in the motor shaft with the pressure equalization channel 45, wherein the branch channels open at a distance from the outer end of the disk seal 31 in the pressure equalization channel 45.
  • Each disc seal 31 within a groove of a wing 15 and each disc seal 31 within a rib 13 in the cylinder 3 is provided with branch channels 47; 49 to the annular spaces 37; 39 connected.
  • the Fig. 4 shows a swivel motor 1 in the basic design according to Fig. 1 , Deviating, the annular spaces 37; 39 via radial passages 51 connected to the pressure equalization passage 45 in each disk seal, as in the Fig. 5 is shown enlarged.
  • the radial channels are z. B. formed by a coinage.
  • the pressure equalization channel 45 can be dimensioned in the seal with a comparatively large cross-section, since a desired throttle function is generated within the pressure equalization channel of the embossing.
  • the Fig. 6 shows a detailed view of a window seal 31; 33 inside a groove. Included in this solution the disk seal 31 a sealing frame 53 in conjunction with a plurality of juxtaposed axially and radially elastic Med Greer 55. Beid lake arranged supplements 57; 59 complete the window seals.
  • the transverse opening 65 can extend over the entire width of the window seal and is characterized by the inserts 57; 59 closed depending on the direction of flow. If, for example, a greater momentary pressure prevails in the working chamber 19 than in the working chamber 17, then the sealing frame 53 is possibly pressed together with the filling pieces 55 onto the insert 59, which is supported on the right-hand groove side wall. Within the pressure equalization channel 45 is about the same pressure as in the working chamber 17. The supplement 59 floats between the right groove side wall and the sealing frame with the filling pieces.
  • the connection opening extends only in a very short way and can also be performed with relatively little effort in the sealing body. If the gap 71 forms between the groove side wall and a shim, then the pressure equalizing channel may also be connected to the respective working chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Devices (AREA)
  • Hydraulic Motors (AREA)
  • Actuator (AREA)
EP09155990A 2008-03-31 2009-03-24 Vérin rotatif Withdrawn EP2107254A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008016750A DE102008016750A1 (de) 2008-03-31 2008-03-31 Schwenkmotor

Publications (2)

Publication Number Publication Date
EP2107254A2 true EP2107254A2 (fr) 2009-10-07
EP2107254A3 EP2107254A3 (fr) 2013-01-02

Family

ID=40791725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09155990A Withdrawn EP2107254A3 (fr) 2008-03-31 2009-03-24 Vérin rotatif

Country Status (2)

Country Link
EP (1) EP2107254A3 (fr)
DE (1) DE102008016750A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358519A1 (de) 2003-12-13 2005-07-07 Bayerische Motoren Werke Ag Dichtungselement für Schwenkmotor
DE102004032747A1 (de) 2004-07-07 2006-01-26 Zf Friedrichshafen Ag Schwenkmotor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3957577B2 (ja) * 2001-09-11 2007-08-15 ジャパン・ハムワージ株式会社 ロータリーベーン式舵取機のシール構造
DE10243696B3 (de) * 2002-09-20 2004-03-11 Zf Sachs Ag Schwenkmotor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358519A1 (de) 2003-12-13 2005-07-07 Bayerische Motoren Werke Ag Dichtungselement für Schwenkmotor
DE102004032747A1 (de) 2004-07-07 2006-01-26 Zf Friedrichshafen Ag Schwenkmotor

Also Published As

Publication number Publication date
DE102008016750A1 (de) 2009-10-01
EP2107254A3 (fr) 2013-01-02

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