WO2017045842A1 - Soupape d'amortissement pour amortisseur de vibrations - Google Patents

Soupape d'amortissement pour amortisseur de vibrations Download PDF

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Publication number
WO2017045842A1
WO2017045842A1 PCT/EP2016/068931 EP2016068931W WO2017045842A1 WO 2017045842 A1 WO2017045842 A1 WO 2017045842A1 EP 2016068931 W EP2016068931 W EP 2016068931W WO 2017045842 A1 WO2017045842 A1 WO 2017045842A1
Authority
WO
WIPO (PCT)
Prior art keywords
opening
valve
damping
vibration damper
fluid channel
Prior art date
Application number
PCT/EP2016/068931
Other languages
German (de)
English (en)
Inventor
Steffen Heyn
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 WO2017045842A1 publication Critical patent/WO2017045842A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
    • F16F9/3481—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body characterised by shape or construction of throttling passages in piston

Definitions

  • the invention relates to a damping valve for a vibration damper, in particular for a motor vehicle, according to the preamble of patent claim 1.
  • a generic type damping valve for a vibration damper is known for example from DE 24 24 040 A1.
  • a generic damping valve comprises at least one throttle duct which is at least partially covered by a spring-loaded valve disk and which is flowed through by the damping medium during operation of the vibration damper.
  • the speed of the damping medium during the flow through the piston 1 during suspension movements is generally dependent on the extent and speed of the suspension movement.
  • the direction of the suspension movement determines the flow direction of the damping medium through the damping valve.
  • the damping medium flowing through the throttle channel generates sufficient pressure on the valve disk, so that the damping medium can push the valve disk away from the valve body and flow through the throttle channel, damped by the valve disk.
  • the damping medium then flows through permanently open and non-closable fluid ducts designed in the damping valve, so-called constant passages. These usually comprise a first opening for the damping fluid, a second opening and a connecting portion connecting the two openings, which is designed as a bore or as a parallel-walled, substantially rectangular embossing.
  • the size of the damping force can be adjusted, which is generated by the displacement of the damping medium through the geometrically fixed fluid channel.
  • the damping force of a constant passage depends on the size of the fluid channel, as well as the length of its parallel-walled connecting portion and the viscosity of the damping medium. Due to the gap flow effect, the length of the parallel-walled connection section significantly influences the damping medium pressure in the fluid channel because of the wall friction. Increasing the viscosity of the damping medium increases this effect.
  • the present invention thus has the object of specifying a damping valve for a vibration damper, which reduces the temperature-dependent change of the damping force generated by the fluid channel.
  • the connecting portion is formed such that a cross section of the second opening, a multiple of a cross section of the first opening and wherein the connecting portion is formed such that its cross-section over its entire length extent from the first opening to steadily increased to the second opening.
  • the cross-section of the connecting portion of the fluid channel continuously increases over its entire length from the first opening to the second opening and thus the connecting portion of the fluid channel is not parallel walls, the wall friction in the fluid channel can be significantly reduced and thus the gap flow effect can be almost eliminated , As a result, the temperature-dependent change of the damping force generated by the fluid channel is reduced to a minimum.
  • the connecting portion of the permanently open fluid channel between the first opening and the second opening may be formed pyramidal or conical. This can be done by a stamping process.
  • the entire damping force characteristic of the vibration damper can be additionally adjusted.
  • the fluid channels may be advantageous to align the fluid channels functionally identical with respect to a flow direction of the damping medium in order to increase the flow of the damping medium through the fluid channels and / or the technical effect of the invention.
  • the fluid channels are aligned in the same direction with respect to a flow direction of the damping medium through the damping valve to each other.
  • a further advantageous embodiment provides that at least one fluid channel is oriented in opposite directions relative to a flow direction of the damping medium to at least one further fluid channel.
  • Fig. 1 a partial sectional view of an exemplary embodiment of a damping valve according to claim 1;
  • FIG. 2 is a perspective view of a damping valve according to FIG. 1;
  • FIG. 3 is an enlarged perspective view of an exemplary embodiment of a fluid channel according to FIG. 2;
  • FIG. 4 is an enlarged perspective view of another exemplary embodiment of a fluid channel
  • Fig. 5 a perspective view of a damping valve.
  • FIG. 1 shows a partial sectional view of an exemplary embodiment of a damping valve according to claim 1.
  • Fig. 1 is a partial sectional view.
  • the center of gravity of the illustration in Fig. 1 was placed in only one direction of flow, which is not intended to limit the scope of the present invention.
  • the damping valve 1 shown in FIG. 1 is designed on a piston 23 of a motor vehicle vibration damper, which is arranged sealed within a filled with a damping medium working cylinder 19 against a cylinder inner wall and the interior of the working cylinder 19 in a first working space 20 and a second Workspace 21 divided.
  • the piston 23 is arranged on a piston rod pin 13 of a piston rod 12 and connected to a Verspannbauteil 1 6 with the piston rod 12 fixed.
  • the damping valve 1 comprises a valve body 2 with at least one, an inlet opening 4 and an outlet opening 5 having passage 3 for a flow direction 22 of the damping medium.
  • the outlet opening 5 of the passage channel 3 is covered with at least one spring-loaded valve disk 6.
  • the damping valve 1 for at least one flow direction 22 at least one permanently open and non-closable fluid channel 7; 8 for the damping medium.
  • the fluid channel 7; 8 comprises a first opening 9, for the entry of the damping medium flowing in the defined flow direction 22, a second opening 10 for the exit of the damping medium and a connecting portion 11 which connects the first opening 9 and the second opening 10.
  • the damping medium If the piston moves in the direction of the first working space 20, the damping medium is displaced from the first working space 20 through the damping valve 1 into the second working space 21. In this case, the damping medium flows through the passage 3 with its inlet opening 4 to the outlet opening 5, which is covered by the valve disc 6. If the hydraulic pressure of the damping medium is not large enough to lift off the valve disk 6, then the damping medium flows through the fluid channel 7.
  • the connecting portion 1 1 of the permanently open fluid channel 7; 8 between the first opening 9 and the second opening 10 may be substantially pyramidal, or truncated pyramid shaped.
  • the first opening 9 at a tip of the imaginary pyramid and the second opening 10 at the base of the imaginary pyramid is executed.
  • FIG. 3 shows that the permanently open fluid channel 7; 8 between the valve body 2 and the valve disc 6 is executed and that the fluid channel 7; 8 between the valve disc (6) and the valve body (2) has an opening angle ß.
  • the opening angle ß of the connecting portion 1 1 of the permanently open fluid channel 7; 8 greater than or equal to 6 °.
  • the base of the imaginary pyramid can be configured as a simple convex polygon. This embodiment is not shown in the figures, but is also possible.
  • FIG. 4 Another possible embodiment of the connecting portion 1 1 is shown in FIG. 4.
  • the connecting portion 1 1 of the permanently open fluid channel 7; 8 between the first opening 9 and the second opening 10 is substantially conical or frusto-conical.
  • the first opening 9 is executed according to FIG. 4 at a tip of an imaginary cone and the second opening 10 at a base of the imaginary cone.
  • the damping valve 1 may have a plurality of permanently open fluid channels 7; 8, wherein the fluid channels 7; 8 based on a flow direction of the damping medium are aligned in the same direction to each other by the damping valve 1, as shown in FIG.
  • a further advantageous embodiment provides that at least one fluid channel 7 is oriented in opposite directions to at least one further fluid channel 8 relative to a flow direction of the damping medium.
  • FIG. 5 This advantageous embodiment variant of the steam valve 1 according to the invention is shown in FIG. 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

L'invention concerne une soupape d'amortissement (1) pour un amortisseur de vibrations, en particulier pour un amortisseur de vibrations de véhicule automobile, comprenant un corps de soupape (2) muni d'au moins un conduit de passage (3) présentant une ouverture d'entrée (4) et une ouverture de sortie (5) pour respectivement une direction d'écoulement (22) d'un fluide d'amortissement. L'ouverture de sortie (5) du conduit de passage (3) est recouverte par au moins un disque de soupape (6) sollicité par ressort, et la soupape d'amortissement (1) présente pour au moins une direction d'écoulement (22) au moins un conduit de fluide (7 ; 8) pour le fluide d'amortissement, ouvert en permanence et non fermable, comportant une première ouverture (9), une seconde ouverture (10) et une partie de liaison (11) qui relie l'une à l'autre la première ouverture (9) et la seconde ouverture (10). L'invention est caractérisée en ce que le conduit de fluide (7 ; 8) est conçu de telle manière qu'une section transversale de la seconde ouverture (10) est égale à un multiple d'une section transversale de la première ouverture (9), et en ce qu'une section transversale de la partie de liaison (11) s'agrandit sur la totalité de son étendue longitudinale à partir de la première ouverture (9) jusqu'à la seconde ouverture (10).
PCT/EP2016/068931 2015-09-17 2016-08-09 Soupape d'amortissement pour amortisseur de vibrations WO2017045842A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015217764.5A DE102015217764A1 (de) 2015-09-17 2015-09-17 Dämpfventil für einen Schwingungsdämpfer
DE102015217764.5 2015-09-17

Publications (1)

Publication Number Publication Date
WO2017045842A1 true WO2017045842A1 (fr) 2017-03-23

Family

ID=56611271

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/068931 WO2017045842A1 (fr) 2015-09-17 2016-08-09 Soupape d'amortissement pour amortisseur de vibrations

Country Status (2)

Country Link
DE (1) DE102015217764A1 (fr)
WO (1) WO2017045842A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018112458A1 (de) * 2018-05-24 2019-11-28 Stabilus Gmbh Verfahren zur Herstellung eines Kolbens und Kolben

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5595269A (en) * 1993-05-10 1997-01-21 Fichtel & Sachs Ag Vibration damper for a motor vehicle
DE102010040458A1 (de) * 2010-09-09 2012-03-15 Zf Friedrichshafen Ag Dämpfventil für einen Schwingungsdämpfer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2424040C3 (de) 1974-05-17 1981-07-30 Boge Gmbh, 5208 Eitorf Kolben von Schwingungsdämpfern, insbesondere für Kraftfahrzeuge
DE3100886A1 (de) * 1981-01-14 1982-08-05 Fichtel & Sachs Ag, 8720 Schweinfurt Hydraulischer schwingungsdaempfer mit geraeuscharmen daempfventilen
US9441699B2 (en) * 2013-05-13 2016-09-13 Tenneco Automotive Operating Company Inc. Orifice disc for regulating flow in damper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5595269A (en) * 1993-05-10 1997-01-21 Fichtel & Sachs Ag Vibration damper for a motor vehicle
DE102010040458A1 (de) * 2010-09-09 2012-03-15 Zf Friedrichshafen Ag Dämpfventil für einen Schwingungsdämpfer

Also Published As

Publication number Publication date
DE102015217764A1 (de) 2017-03-23

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