EP0193640B1 - Dispositif de soupape à siège - Google Patents

Dispositif de soupape à siège Download PDF

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Publication number
EP0193640B1
EP0193640B1 EP85110597A EP85110597A EP0193640B1 EP 0193640 B1 EP0193640 B1 EP 0193640B1 EP 85110597 A EP85110597 A EP 85110597A EP 85110597 A EP85110597 A EP 85110597A EP 0193640 B1 EP0193640 B1 EP 0193640B1
Authority
EP
European Patent Office
Prior art keywords
valve
seat
plunger
stop
arrangement 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.)
Expired
Application number
EP85110597A
Other languages
German (de)
English (en)
Other versions
EP0193640A1 (fr
Inventor
Wolfgang Ing. Grad. Kaltenthaler
Manfred Ing Grad. Kramer
Hans-Dieter Gelse
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.)
Wabco Westinghouse Fahrzeugbremsen GmbH
Original Assignee
Wabco Westinghouse Fahrzeugbremsen GmbH
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 Wabco Westinghouse Fahrzeugbremsen GmbH filed Critical Wabco Westinghouse Fahrzeugbremsen GmbH
Publication of EP0193640A1 publication Critical patent/EP0193640A1/fr
Application granted granted Critical
Publication of EP0193640B1 publication Critical patent/EP0193640B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group

Definitions

  • the invention relates to a seat valve device according to the preamble of patent claim 1.
  • Such a seat valve device is such. B. in the "Handbook of Motor Vehicle Technology" by Buschmann / Koessler Volume 1, pages 199 and 200.
  • a compressor which is to switch from the delivery phase to the idling phase when a predetermined pressure is exceeded in a compressed air device connected to the compressor.
  • the changeover from the delivery phase to the idling phase takes place in such a way that an actuating device controlled by the predetermined pressure in the compressed air device moves the valve tappet of the seat valve device into a position in which the compression chamber of the compressor is connected to the suction chamber.
  • the compressor operates largely without pressure in the idling phase. If the pressure in the compressed air device falls below the predetermined value, the valve tappet is moved back into its starting position by the actuating device, in which the connection between the compression chamber and the suction chamber which is present through the seat valve device is closed and the compressor is working in the delivery phase.
  • a seat valve device with a valve tappet of the type described in the introduction, which serves to regulate the idle speed of a compressor, is known from US-A-2594815.
  • This valve device is arranged laterally offset in the cylinder head with respect to the compression chamber, so that the problem of a seat valve immersed in the compression chamber does not arise and consequently a limitation of the valve stroke in the opening direction by a stop is not necessary. For this, however, an increase in the dead space has to be accepted disadvantageously.
  • valve tappet When using a fixed stop for the valve tappet, however, the problem arises that when the seat valve device is opened and closed, the valve tappet is suddenly moved by suddenly acting, high control forces and is also stopped suddenly by an unyielding stroke limitation. This can result in a breakage of the valve stem or a deformation of the stop as a result of overstressed material.
  • valve tappet becomes unstable in the opening and closing phase and carries out so-called fluttering movements, which are further supported by the compression work of the compressor piston. It is known that such flutter movements of valve lifters, which are comparable to hammer blows, result in destruction of the valve seat and the valve lifter head.
  • the invention is therefore based on the object to improve a device of the type mentioned with simple means in comparison to the known devices so that when opening and closing the valve device despite sudden stroke movements of the valve stem, the forces acting on the functional parts of the valve device so it is small that destruction of the functional parts or their premature wear is largely avoided even during continuous operation.
  • the invention has the advantage that the operational safety of the valve device is increased and its service life is extended.
  • the drawing shows a partial representation of a compressor with a seat valve device in the embodiment according to the invention with a suction chamber 1, a pressure chamber 2 and a compression chamber 3.
  • a valve device 7 is arranged, which in the open position, As shown in the drawing, the compression chamber 3 connects to the suction chamber 1 via a valve seat 8 and to the atmosphere via a suction connection 9.
  • the seat valve device 7 has a valve tappet 10, a stop 11 and an actuating device for the valve tappet 10, which in the present exemplary embodiment consists of a valve piston 12.
  • the valve piston 12 is guided in a sliding and sealing manner in a bush 13 and is loaded by a spring 14 in the closing direction of the seat valve device 7.
  • the valve piston 12 is connected to the valve tappet 10 by means of a wedge connection 15 known per se in a conical, central bore 16 of the valve piston 12.
  • valve piston 12 there is a control pressure chamber 17, which is connected via a control input 26 to one on the pressure side of the com pressors is connected via a pressure connection 27 connected compressed air device.
  • the valve stem 10 has a stem 18 and a stem head 19.
  • the stem 18 is divided into three areas 20, 21 and 22 with different cross sections.
  • the shaft 18 In its central region 20, the shaft 18 has a smaller cross section than the regions 21 and 22 adjoining the central region 20 on both sides.
  • the central region 20 extends approximately to Ya of the total length of the shaft 18. The transitions from the central region 20
  • the shaft 18 to the regions 21 and 22 adjoining the central region 20 on both sides are rounded.
  • the valve piston 12 has at least one stop surface 23 which is arranged around the central axis of the valve tappet 10 and which faces a stop surface 24 of the stop 11 and which can be supported on the stop surface 24 of the stop 11.
  • the stop 11 is annular and is arranged coaxially to the central axis of the valve lifter.
  • the stop 11 has at least one stop surface 24 arranged around the central axis of the stop 11 on the side facing the valve piston 12 and at least one support surface 25 arranged around the central axis of the stop 11 on the side facing away from the valve piston 12.
  • the stop surfaces 23 and 24 and the support surface 25 can each consist of a closed ring surface or of an annular surface formed from separate surfaces.
  • the distance of the stop surface 24 from the central axis of the stop 11 is different from the distance of the support surface 25 from the central axis of the stop 11, as a result of which the stop 11 is designed to be elastic in the manner of a plate spring.
  • the stop 11 is supported with its support surface 25 against the housing part 4 of the cylinder head 5.
  • the stop surface 24 of the stop 11 serves as a stroke limiter for the valve tappet.
  • a further load which corresponds to a pressure load acting on the stop 11, is introduced into the stop 11 by the stop surface 23 of the valve lifter 10 via the stop surface 24 of the stop 11.
  • This pressure load is partially converted by the different distances between the stop surface 24 and the support surface 25 to the central axis of the stop 11 in a bending stress, which is effective in the wall area between the stop surface 24 and the support surface 25 of the stop 11 in the manner of a plate spring.
  • a remaining portion of the pressure load is supported via the support surface 25 of the stop 11 on the housing part 4 of the cylinder head 5.
  • the conversion of the pressure load into a bending stress which takes place in part due to the shape of the stop 11 described, additionally has a damping effect on the tensile stress wringing on the valve tappet 10.
  • the control pressure chamber 17 is connected to the atmosphere via the control input 26.
  • the valve tappet 10 with the valve piston 12 is suddenly moved by the spring 14, supported by the compression work of the compressor piston, into the starting position in which the seat valve device 7 is closed.
  • This stroke movement of the valve tappet 10 is stopped by the tappet head 19 of the valve tappet 10 hitting the valve seat 8.
  • the braked mass formed by the area 21 of the valve tappet 10 and the valve piston 12, causes a tensile stress in the central area 20 of the stem 18, which, as already described, is partially compensated for by the shape of the stem 18.
  • valve lifter 10 and the stop 11 Due to the shape of the valve lifter 10 and the stop 11 according to the invention, material stresses that suddenly occur when the seat valve device 7 is opened and closed are partially compensated elastically so that a break in the stem 18, a deformation of the valve piston 12 and the stop 11 in the area of the stop surfaces 23 and 24 and destruction of the sealing surface on the tappet head 19 and on the valve seat 8 is avoided.
  • the seat valve device 7 shown in the exemplary embodiment is not limited to use in connection with a compressor, but can be used in other devices in which the forces acting on such a seat valve device are of the same type or similar.
  • the actuation of the seat valve device 7 by compressed air selected in the exemplary embodiment can also take place hydraulically, electro-hydraulically or electro-pneumatically, as well as by purely mechanical actuating means.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Lift Valve (AREA)

Claims (9)

1. Dispositif de soupape à siège, ayant les caractéristiques suivantes:
a) il comprend un siège de soupape et un poussoir de soupape mobile par rapport à ce siège;
b) le poussoir de soupape présente une tige et une tête, cette tête du poussoir formant, avec le siège, la soupape à siège;
c) la tige du poussoir de soupape présente un rétrécissement de section droite formant une zone d'allongement élastique, dont les transitions aux régions qui la bordent des deux côtés sont arrondies;
caractérisé par les caractéristiques suivantes:
d) il comprend une butée (11) pour limiter le mouvement du poussoir de soupape (10) dans le sens de l'ouverture de la soupape à siège (8, 19);
e) la partie rétrécie de la section droite se trouve dans une zone médiane (20) de la tige (18), zone qui s'étend sur environ Ya de la longueur de la tige (18) et qui, en direction de la tête (19) du poussoir, dépasse une zone (21) du poussoir de soupape (10) dans laquelle sont introduites les forces exercées par la butée (11) sur le poussoir de soupape (10).
2. Dispositif de soupape à siège selon revendication 1, caractérisé par la caractéristique suivante: un dispositif d'actionnement est prévu pour le mouvement du poussoir de soupape (10) dans le sens de l'ouverture de la soupape à siège (8,19).
3. Dispositif de soupape à siège selon revendication 2, caractérisé par la caractéristique suivante: le dispositif d'actionnement pour le poussoir de soupape (10) est constitué par un piston de soupape (12) qui est lié au poussoir de soupape (10).
4. Dispositif de soupape à siège selon revendication 3, caractérisé par la caractéristique suivante: le piston de soupape (12) est lié au poussoir de soupape (10) au moyen d'une liaison par clavetage (15) connue en soi.
5. Dispositif de soupape à siège selon revendication 4, caractérisé par la caractéristique suivante: le piston de soupape (12) possède un trou conique central qui est une partie de la liaison par clavetage (15).
6. Dispositif de soupape à siège selon revendication 1, caractérisé par la caractéristique suivante: la butée (11) pour limiter le mouvement du poussoir de soupape (10) est de forme annulaire et est angencée coaxialement à l'axe médian du poussoir de soupape (10).
7. Dispositif de soupape à siège selon revendication 6, caractérisé par la caractéristique suivante: la butée (11) présente une configuration qui la rend élastique à la manière d'un ressort Belleville.
8. Dispositif de soupape à siège selon revendication 1, caractérisé par la caractéristique suivante: le dispositif de soupape à siège (7) est utilisé en combinaison avec un compresseur comprenant un piston alternatif, des soupapes d'admission et d'échappement chargées par ressort, et une chambre de pression, une chambre d'aspiration et une chambre de compression.
9. Dispositif de soupape à siège selon revendication 8, caractérisé par la caractéristique suivante: pendant la durée d'un état de fonctionnement prédéterminé d'un dispositif pneumatique relié au compresseur, le dispositif de soupape à siège (7) relie la chambre de compression à la chambre d'aspiration du compresseur.
EP85110597A 1984-12-18 1985-08-23 Dispositif de soupape à siège Expired EP0193640B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3446096 1984-12-18
DE19843446096 DE3446096A1 (de) 1984-12-18 1984-12-18 Sitzventileinrichtung

Publications (2)

Publication Number Publication Date
EP0193640A1 EP0193640A1 (fr) 1986-09-10
EP0193640B1 true EP0193640B1 (fr) 1988-10-26

Family

ID=6253060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110597A Expired EP0193640B1 (fr) 1984-12-18 1985-08-23 Dispositif de soupape à siège

Country Status (3)

Country Link
US (1) US4685653A (fr)
EP (1) EP0193640B1 (fr)
DE (2) DE3446096A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908610A1 (de) * 1989-03-16 1990-09-20 Wabco Westinghouse Fahrzeug Einrichtung zur erzeugung von druckluft
DE4308775C1 (de) * 1993-03-19 1994-08-25 Daimler Benz Ag Gaseinblaseventil zum Einblasen von gasförmigem Kraftstoff, insbesondere Wasserstoff, in den Brennraum einer Brennkraftmaschine
GB2323639B (en) * 1996-12-13 2000-08-23 Knorr Bremse Systeme Improvements relating to gas compressors
US6125809A (en) * 1998-10-20 2000-10-03 Caterpillar Inc. Valve redesign for improved life
US6533242B2 (en) * 2001-03-13 2003-03-18 Delphi Technologies, Inc. Shaft having variable compliance to a bushing
WO2004081428A2 (fr) * 2003-03-07 2004-09-23 Swagelok Company Soupape a butee reglable
DE502005002636D1 (de) * 2004-10-19 2008-03-13 Voith Patent Gmbh Mehrstufiger Kolbenverdichter mit reduzierter Leistungsaufnahme im Leerlauf
TW200641283A (en) * 2005-02-18 2006-12-01 Swagelok Co Flow control device with flow adjustment mechanism
DE102009053133A1 (de) * 2009-11-05 2011-05-12 Voith Patent Gmbh Kolbenverdichter mit Leerlaufventil
US8960073B2 (en) * 2011-10-13 2015-02-24 Wabco Europe Bvba Cylinder head for a compressor
JP5964134B2 (ja) * 2012-05-23 2016-08-03 愛三工業株式会社 吸気用エンジンバルブ
DE102014014140A1 (de) 2014-09-20 2015-03-19 Daimler Ag Kompressor zum Verdichten von Luft, insbesondere für einen Kraftwagen
DE102016106332A1 (de) * 2016-04-07 2017-10-12 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Kompressor mit Energiesparvorrichtung und Verfahren zum Entlasten des Kompressors
DE102018103595A1 (de) * 2018-02-19 2019-08-22 Man Truck & Bus Ag Vorrichtung zur Erzeugung von Druckluft
DE102019130210B4 (de) * 2019-11-08 2024-04-18 Nabtesco Automotive Corporation Kolbenverdichter mit Energiespareinrichtung

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US2172751A (en) * 1939-09-12 Compressor
US896439A (en) * 1907-09-13 1908-08-18 Fred S Holsteen Valve.
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US2160860A (en) * 1936-02-20 1939-06-06 Schramm Inc Compressor
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DE1077018B (de) * 1957-03-06 1960-03-03 Nordiska Armaturfab Ab Absperrventil mit doppeltwirkendem Druckmittelantrieb
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FR1354983A (fr) * 1963-01-30 1964-03-13 Renault Perfectionnement aux soupapes de moteurs à combustion interne
US3512454A (en) * 1968-01-02 1970-05-19 Swingline Inc Air return mechanism for a fastener driving machine
DE7515402U (de) * 1975-05-14 1978-11-02 Teves-Thompson Gmbh, 3013 Barsinghausen Ventilkegelstuecke
DE2655067A1 (de) * 1976-12-04 1978-06-08 Maschf Augsburg Nuernberg Ag Ventil fuer brennkraftmaschinen
DE2918482A1 (de) * 1979-05-08 1980-11-13 Wabco Fahrzeugbremsen Gmbh Regelung von drucklufterzeugeranlagen
DE3136948A1 (de) * 1981-09-17 1983-03-31 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Einrichtung zur erzeugung von druckgas
DE3214713A1 (de) * 1982-04-21 1983-10-27 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Einrichtung zur erzeugung von druckgas

Also Published As

Publication number Publication date
US4685653A (en) 1987-08-11
EP0193640A1 (fr) 1986-09-10
DE3446096A1 (de) 1986-06-19
DE3565876D1 (en) 1988-12-01

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