EP3177848A1 - Soupape d'amortissement dotée d'une soupape de sécurité - Google Patents

Soupape d'amortissement dotée d'une soupape de sécurité

Info

Publication number
EP3177848A1
EP3177848A1 EP15735920.9A EP15735920A EP3177848A1 EP 3177848 A1 EP3177848 A1 EP 3177848A1 EP 15735920 A EP15735920 A EP 15735920A EP 3177848 A1 EP3177848 A1 EP 3177848A1
Authority
EP
European Patent Office
Prior art keywords
valve
damping
pressure relief
damping valve
pressure
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Withdrawn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
EP15735920.9A
Other languages
German (de)
English (en)
Inventor
Lothar Callies
Timo Schaffelhofer
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 EP3177848A1 publication Critical patent/EP3177848A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
    • F16F9/465—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall using servo control, the servo pressure being created by the flow of damping fluid, e.g. controlling pressure in a chamber downstream of a pilot passage
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0406—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls

Definitions

  • the invention relates to a damping valve according to the preamble of patent claim 1, and a vibration damper with such a damping valve.
  • a generic damping valve for a vibration damper is shown in DE 10 2009 059 808 A1.
  • the damping valve forms an annular control chamber.
  • This control chamber is operatively connected via a throttle opening with an upper working space of the vibration damper.
  • the control chamber is limited by a main stage body and a valve housing, wherein main stage body and valve housing are aligned on guide surfaces to each other and can move axially to each other.
  • the guide surfaces also seal the control chamber substantially from the other chambers of the damping valve.
  • leaks can be effective on the guide surfaces that produce a damping medium flow through the guide surfaces in the control room and lead to an additional closing force on the main stage body.
  • the pressure in the interior of the valve and in the control chamber increases sharply, wherein the flowing into the control chamber damping medium can not be dissipated quickly enough in extreme conditions through the throttle opening.
  • the damping medium can foam, whereby a damping effect in a next movement of the damping valve fails substantially less.
  • a gas barrier can be made unusable on a piston rod guide o- damaged.
  • a damping valve At a damping valve, at least one throttle opening serves as a permanent connection between a pressure chamber, which is arranged within the damping valve, and a further space, but this throttle opening may not be sufficient under heavy use of the damping valve in order to reduce an overpressure in the pressure chamber sufficiently quickly. Therefore, a pressure relief valve is arranged on the pressure chamber, which allows a sufficient outflow of the damping medium and reduces or prevents an overpressure in the pressure chamber, in particular under heavy load. This pressure relief valve is arranged between the pressure chamber, which may for example constitute a control chamber of the damping valve, and a further space.
  • the pressure relief valve, the pressure chamber and the other room directly, ie, without further intermediate rooms or channels, or indirectly interconnect or wirkverbinden.
  • the additional space can also be arranged inside or outside the damping valve. To reduce the high pressure in this case opens the pressure relief valve, whereby the damping medium can flow through an opening of the pressure relief valve from the pressure chamber in the other room.
  • the damping valve may be adjustable, in particular electronically adjustable.
  • the damping valve preferably has a damping arrangement in the form of a pressure damping and a tensile damping. It is also possible that the damping valve is a multi-level characteristic curve or a characteristic curve with several sections of different damping force or Dämpfkraftverstructure.
  • the damping valve can be used, among other things, for a monotube vibration damper as well as for a twin-tube vibration damper.
  • the pressure relief valve is connected in parallel to the throttle opening. Thereby, the total flow rate of the damping medium and in particular the outflow cross section can be increased from the pressure chamber to the other room.
  • the pressure relief valve forms the throttle opening.
  • the overpressure valve can permanently produce a certain flow cross-section. have cut, which increases from a certain overpressure by opening the pressure relief valve.
  • the pressure relief valve is formed by a check valve.
  • the check valve may in this case be designed according to the document DE 10 2006 036 691 A1, the content of which is to be regarded as the content of this document.
  • the check valve can release an opening at an overpressure, which allows a flow of the pressure medium from the pressure chamber or a reduction of the overpressure in the control chamber.
  • the overpressure valve is released in a first direction when the damping valve is loaded and locked in a second direction or throttled in the second direction, the flow of damping medium through the damping valve, in particular by a check valve.
  • throttling in a second direction may correspond to a flow area that is smaller than the flow area in the first direction when the pressure relief valve is open, which may be considered unthrottled.
  • a flow of damping medium in the first direction through the pressure relief valve may therefore be substantially larger than in the second direction.
  • the pressure relief valve blocks in a second direction, preferably when the pressure relief valve is connected in parallel to the throttle opening.
  • the pressure relief valve in a second direction conveniently throttled when the pressure relief valve forms the throttle opening.
  • Locking or throttling of the pressure relief valve in the second direction is particularly advantageous when the pressure chamber forms a control chamber of the damping valve and this depends on the pressure within the control chamber a damping effect in only one operating direction of the damping valve, for example in the printing direction or in the pulling direction. As a result, the original damping characteristic of the damping valve in the second direction is maintained.
  • the pressure in the pressure chamber in the first direction can be reduced. Further explanation of the reduction of the overpressure can be taken from the description of the figures.
  • the first direction corresponds to a loading of the damping valve in the pressure direction or in the pulling direction. As a result, the pressure relief valve can be optimally adapted to the structure and operation of the damping valve.
  • the pressure relief valve is open when the damping valve is loaded in the first direction above a certain pressure difference ⁇ , in particular a pressure difference ⁇ > 0, between the pressure chamber and the further space. It is therefore possible to optimally adapt the damping characteristic of the damping valve to the requirements. In order to achieve an opening of the pressure relief valve only at a certain pressure difference, it may be advantageous to use a biased check valve.
  • FIG. 1 shows a vibration damper with a damping valve and a pressure relief valve.
  • Fig. 2 shows another variant of the pressure relief valve of Fig. 1;
  • FIG. 3 shows a further view of the pressure relief valve from FIG. 2.
  • FIG. 1 shows a cross-section of a vibration damper 10 with an adjustable damping valve 12.
  • the damping valve in this case comprises an inlet valve 14, which is optional here, and an adjustable main valve 1 6 with a pilot valve 17. While the damping valve 12 separates a lower working chamber 18 from an upper working chamber 20, divides the main valve 1 6 the interior 22 into a plurality of subspaces , including a main room 22a, a supply room 22b and a control room 22c.
  • the control chamber 22c is referred to above and also referred to below as the pressure chamber 22c.
  • the main space 22a and the flow space 22b are connected to each other via a channel 24a in a main valve body 28.
  • control chamber 22 c is also permanently connected to the upper working space 20 via a throttle opening 30, which is arranged on an inner valve housing 40.
  • control chamber 22 c is limited by the inner valve housing 40 and the main valve body 28.
  • the main valve body 28 is in this case disposed within the valve housing 40 and axially guided over guide surfaces 38 against the valve housing 40.
  • a damping medium flow from the main space 22 a and the flow space 22 b via the guide surfaces 38 to the control chamber 22 c is not given or negligible, so that the control chamber is substantially sealed from the main space 22 a and the flow space 22 b.
  • Further explanations on the operation of the damping valve are not given here, but reference is made to DE 198 22 448 A1, which explains the basic operation.
  • the content of DE 198 22 448 A1 is to be regarded as the content of this document.
  • the damping valve 12 in addition to the throttle openings 30, a pressure relief valve 32 on the valve housing 40, which can establish or block an operative connection between the control chamber 22c and the upper working chamber 20.
  • the pressure relief valve 32 serves as an additional connection to the throttle opening 30 between the control chamber 22c and the upper working chamber 20.
  • the pressure relief valve 32 is in this case arranged parallel to the throttle opening 30.
  • the over- Pressure valve 32 thereby formed in particular by a check valve 36 which has a check body 35 which is biased by a biasing member 37 against an opening 34.
  • the overpressure valve 32 opens downward or in the direction of the pressure stage in order to increase a flow cross section for the flow of the damping medium from the control chamber 22 c into the upper working chamber 20.
  • the pressure relief valve 32 opens only from a pressure difference ⁇ between the pressure of the control chamber 22c and the pressure of the upper working chamber 20, wherein the pressure in the control chamber 22c must be greater than in the upper working chamber 20.
  • the pressure relief valve 32 opens here at a defined pressure difference ⁇ > 0 between the control chamber 22c and the upper working chamber 20.
  • the pressure relief valve 32 is designed such that a pressure medium flow from the interior 22 of the damping valve 12 allows to the outside, from the outside into the interior 22nd however, it is prevented.
  • An overpressure in the upper working chamber 20 therefore acts on the overpressure valve 32.
  • the pressure relief valve 32 is locked at a movement of the damping valve 12 upwards or in the pulling direction, whereby the damping characteristic of the damping valve 12 remains unchanged in the pulling direction.
  • FIGS. 2 and 3 show a further variant of the overpressure valve 32, which is also designed here as a check valve 36.
  • the pressure relief valve 32 also forms the throttle opening 30.
  • the check body 35 is shown, which is biased by means of the biasing spring 37, which is supported on a fluid-permeable support plate 42, and the check body against a pressure relief valve seat 44.
  • a damping medium from the upper working chamber 20, between the check body 35 and the valve housing 40 over pass through a groove 30 on the pressure relief valve seat 44 in the opening 34 and then into the control chamber 22c.
  • the throttle opening 30 is in this case formed in particular by the groove 30 and the opening 34, wherein the flow cross section of the groove 30 has a limiting effect.
  • a plurality of grooves can be arranged on the pressure relief valve seat 44 in order to increase a flow cross section.
  • the pressure relief valve 32 throttles the flow of the damping medium through the pressure relief valve 32 in the second direction. If the Dämpfstoffsch Kunststoffsch Kunststoff reversed, so the check body 35 lifts relative to the bias of the pressure relief valve seat 44 and releases the opening 34, whereby the flow area in the first direction is substantially increased. An overpressure in the control chamber 22c with respect to the upper working chamber 20 can thereby be reduced.
  • FIG. 3 shows a top view of the overpressure valve seat 44, wherein a plurality of grooves 30 are distributed uniformly on the overpressure valve seat 44.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

L'invention concerne une soupape d'amortissement (12) réglable comprenant une chambre de pression (22c) pour assurer la commande de ladite soupape d'amortissement (12), qui est disposée à l'intérieur de la soupape d'amortissement (12) et qui est reliée à une autre chambre (20) par l'intermédiaire d'au moins un orifice d'étranglement (30), pour assurer le passage d'un fluide amortisseur, la chambre de pression (22c) coopérant avec l'autre chambre (20) par l'intermédiaire d'une soupape de sécurité (32).
EP15735920.9A 2014-08-06 2015-07-06 Soupape d'amortissement dotée d'une soupape de sécurité Withdrawn EP3177848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014215571.1A DE102014215571A1 (de) 2014-08-06 2014-08-06 Dämpfventil
PCT/EP2015/065287 WO2016020125A1 (fr) 2014-08-06 2015-07-06 Soupape d'amortissement dotée d'une soupape de sécurité

Publications (1)

Publication Number Publication Date
EP3177848A1 true EP3177848A1 (fr) 2017-06-14

Family

ID=53539698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15735920.9A Withdrawn EP3177848A1 (fr) 2014-08-06 2015-07-06 Soupape d'amortissement dotée d'une soupape de sécurité

Country Status (5)

Country Link
US (1) US10100895B2 (fr)
EP (1) EP3177848A1 (fr)
KR (1) KR20170038868A (fr)
DE (1) DE102014215571A1 (fr)
WO (1) WO2016020125A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017106802A1 (de) * 2017-03-29 2018-10-04 Thyssenkrupp Ag Hydraulischer Schwingungsdämpfer, insbesondere für ein Fahrzeugfahrwerk
JP2019027521A (ja) * 2017-07-31 2019-02-21 アイシン精機株式会社 減衰力可変バルブ
JP7085689B2 (ja) * 2019-03-26 2022-06-16 日立Astemo株式会社 減衰力調整式緩衝器

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3835705A1 (de) * 1988-10-20 1990-04-26 Bosch Gmbh Robert Stossdaempfer zur daempfung von bewegungsablaeufen
DE3917064A1 (de) * 1989-05-26 1990-11-29 Bosch Gmbh Robert Stossdaempfer ii
US5129489A (en) * 1989-10-20 1992-07-14 Nippondenso Co., Ltd., 1-1 Hydraulically operated displacement transmission mechanism for shock absorber with variable damping force
DE4406373A1 (de) * 1994-02-26 1995-08-31 Fichtel & Sachs Ag Dämpfventileinrichtung
DE4401689B4 (de) * 1994-01-21 2011-01-27 Robert Bosch Gmbh Schwingungsdämpfer zur Dämpfung von Bewegungsabläufen
JP3285302B2 (ja) * 1994-10-21 2002-05-27 ヤマハ発動機株式会社 減衰器
WO1997017556A1 (fr) * 1995-11-07 1997-05-15 Yamaha Hatsudoki Kabushiki Kaisha Amortisseur hydraulique variable
ES2179705B2 (es) 1997-07-08 2003-06-16 Mannesmann Sachs Ag Amortiguador de vibraciones regulable para vehiculos de motor.
DE19822448C2 (de) 1997-07-08 2000-11-30 Mannesmann Sachs Ag Regelbarer Schwingungsdämpfer für Kraftfahrzeuge
DE102006036691B4 (de) 2006-08-05 2014-07-03 Zf Friedrichshafen Ag Rückschlagventil
DE102008041735B3 (de) 2008-09-01 2010-01-21 Zf Friedrichshafen Ag Verstellbares Dämpfventil
DE102009061003B4 (de) * 2009-04-04 2014-12-18 Zf Friedrichshafen Ag Verstellbare Dämpfventileinrichtung
DE102009059808A1 (de) 2009-12-21 2011-06-22 ZF Friedrichshafen AG, 88046 Verstellbares Dämpfventil
DE102010062264B4 (de) * 2010-12-01 2012-08-23 Zf Friedrichshafen Ag Verstellbare Dämpfventileinrichtung für einen Schwingungsdämpfer
DE102011003924B4 (de) * 2011-02-10 2015-01-08 Zf Friedrichshafen Ag Verstellbares Dämpfventil für einen Schwingungsdämpfer

Also Published As

Publication number Publication date
DE102014215571A1 (de) 2016-02-11
WO2016020125A1 (fr) 2016-02-11
KR20170038868A (ko) 2017-04-07
US20170219042A1 (en) 2017-08-03
US10100895B2 (en) 2018-10-16

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