EP0770196A2 - Check valve - Google Patents

Check valve

Info

Publication number
EP0770196A2
EP0770196A2 EP95937787A EP95937787A EP0770196A2 EP 0770196 A2 EP0770196 A2 EP 0770196A2 EP 95937787 A EP95937787 A EP 95937787A EP 95937787 A EP95937787 A EP 95937787A EP 0770196 A2 EP0770196 A2 EP 0770196A2
Authority
EP
European Patent Office
Prior art keywords
valve
check valve
closing body
spring element
spring
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Withdrawn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
EP95937787A
Other languages
German (de)
French (fr)
Inventor
Helmut Staib
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0770196A2 publication Critical patent/EP0770196A2/en
Withdrawn legal-status Critical Current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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members

Definitions

  • the invention relates to a check valve according to the preamble of the main claim.
  • check valve is known from DE 33 29 652 AI.
  • the known check valve has one
  • Disc spring which presses a valve closing body in the middle against a valve seat.
  • the valve stroke of the known check valve is not limited, which leads to the disadvantage of a comparatively long closing time and a high load on the disc spring.
  • fluid flowing around the valve closing body can excite it to vibrate in the direction of its stroke movement, which leads to undesirable fluctuations in the fluid flow rate, which additionally stresses the disc spring dynamically and can cause flow noise.
  • the stroke of the valve closing body and thus its closing time until it is placed on the valve seat after a full opening stroke is limited. Furthermore, the impact of the valve closing body on the valve seat reduced when closing, which reduces the wear of the valve seat and a sealing surface of the valve closing body which bears against it when the check valve is closed.
  • the valve stroke limiter also avoids a rebound, that is to say a repeated brief lifting of the valve closing body after being placed on the valve seat when closing.
  • the spring travel is limited and the spring is thus protected against high loads, in particular against overload. Vibration excitation of the valve closing body by the fluid flowing around it when the check valve is open is prevented.
  • Figure 1 shows an axial section through an inventive check valve
  • FIG. 2 shows a view of a valve closing body from FIG. 1 from below;
  • Figures 3a to 3c a view of three valve closing springs from above.
  • Figure 1 shows a check valve according to the invention, which is integrated as an inlet valve in a piston 10 of a piston pump.
  • the piston 10 is guided in a bore 12 of a cylinder 14 so as to be displaceable in the axial direction and by means of a drive (not shown) to and forward movement (arrow f) can be driven.
  • the cylinder 14 has a radial bore 16 which communicates via a wide circumferential groove 18 in the outer circumference of the piston 10 and a transverse bore 20 passing therethrough with a blind bore 22 in the piston 10 extending in the axial direction.
  • the groove 18 in the piston 10 is so wide that the radial bore 16 in the cylinder 14 opens into the groove 18 at each stroke position of the piston 10 and thereby communicates with the blind bore 22.
  • the piston 10 forms a valve housing of the check valve according to the invention.
  • a valve closing body 24 is received in the blind bore 22.
  • the blind bore 22 leads from a front, annular end face 26 of the piston 10 into the latter.
  • the blind bore 22 is stepped, it has an annular shoulder 28 on which it tapers and on which a conical valve seat 30 is formed.
  • the valve closing body 24 is a rotationally symmetrical plastic injection molded part. It has a sealing cap 32, which rests on the valve seat 30 when the check valve is closed, and has a sealing surface 32. It continues in one piece into a low cylinder section 34 and merges into a cone 36, the tip 38 of which is rounded.
  • the valve closing body 24 has three guide ribs 40 (FIG. 2) that are integral with it, distributed over its circumference, radially projecting and axially parallel, with which it is guided on the bore wall 42 of the blind bore 22 in the piston 10 so as to be axially displaceable.
  • the valve closing body 24 produced as an injection molded part made of plastic has, in addition to its simple and quick producibility in one operation, the advantage that it is light and therefore has short opening and closing times with small actuation forces.
  • the valve closing body 24 of the check valve according to the invention stands in the center of a disc spring 43. This is attached to the piston 10 in an elastically prestressed manner and presses the valve closing body 24 with its sealing surface 32 against the valve seat 30. At its center, it has a recess 44 for receiving and centering the tip 38 of the valve closing body 24.
  • the disc spring 43 is manufactured as a sheet metal stamping. With a small diameter, it can also be produced in an etching process. In this case, it consists, for example, of copper or a copper alloy.
  • the peripheral edge 48 of the disc spring 43 is held by a valve stroke limiting part 52 in contact with the annular front end face 26 of the piston 10.
  • the valve stroke limiting part 52 has a low hollow cylinder section 54 which engages around a front end 56 of the piston 10.
  • a free edge 58 of the hollow cylinder section 54 is deformed into a circumferential groove 60 in the piston 10 so that it engages at its front end 56, and the valve stroke limiting part 52 is connected to the piston 10 in this way.
  • the piston 10 is slightly tapered at its front end 56 between the hollow cylinder section 54 of the
  • the hollow cylinder section 54 of the valve stroke limiting part 52 merges in one piece into a radially inwardly extending flange 62.
  • the disc spring 43 is held by this in contact with the front end face 26 of the piston 10. At two points 64, the circumferential edge 48 of the disc spring 43 is welded to the flange 62 of the valve stroke limiting part 52. By connecting the disc spring 43 to the valve stroke limiting part 52, the disc spring 43 is easy to handle, which is particularly advantageous when assembling the check valve according to the invention if its dimensions are small. Another advantage is that the correct assembly of all parts of the invention
  • the valve stroke limiting part 52 has a crosspiece 66 which is integral with it and which, viewed from the blind bore 22 in the piston 10, bulges outward at two diametrically opposite points in the flange 62 of the valve stroke limiting part 52 transforms. Due to its curvature, the transverse web 66 is at a distance in the axial direction from the center of the disc spring 43 when the check valve is closed. The deflection of the disk spring 43 and the stroke of the valve closing body 24 are limited to this distance. Due to the nature of the design of the disc spring 43 and the valve stroke limiting part 52, the required overall height of the check valve according to the invention is small.
  • the check valve according to the invention knows through the design of its disc spring 43 and the valve stroke limiting part 52 large flow sections and therefore low flow resistance.
  • a leaf spring 67 can be installed in the check valve according to the invention (FIG. 3b). This extends approximately congruently with the transverse web 66 of the valve stroke limiting part 52 and is welded at one end 68 to the flange 62 thereof. Its end 69, which is not welded to the flange 62, rests on the flange 62 and can move in the radial direction on the flange 62 during springing. In the middle, the leaf spring 67 has a recess 70 for the tip 38 of the valve closing body 24.
  • a leaf spring 72 can also be installed in the check valve according to the invention, which ends in the center of the valve stroke limiting part 52 (FIG. 3c). Together with an equally non-continuous arm 74 for limiting the valve stroke instead of the crosspiece 66, this results in an even larger fluid passage area.
  • An end 75 of the leaf spring 72 resting on the flange 62 of the valve stroke limiting part 52 is welded to the flange 62.
  • the leaf spring 72 also has a recess 76 for the tip 38 of the valve closing body 24.

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

Abstract

The invention relates to a check valve with a curved washer (43) pressing a valve closing member (24) against a valve seat (30). To reduce the closing time and reduce the impact of the valve closing member (24) on closing, the invention proposes a transverse shoulder (66) limiting the valve travel.

Description

Beschreibung description
Rückschlagventilcheck valve
Stand der TechnikState of the art
Die Erfindung betrifft ein Rückschlagventil nach der Gattung des Hauptanspruchs.The invention relates to a check valve according to the preamble of the main claim.
Ein derartiges Rückschlagventil ist bekannt aus der DE 33 29 652 AI. Das bekannte Rückschlagventil weist eineSuch a check valve is known from DE 33 29 652 AI. The known check valve has one
Scheibenfeder auf, die einen in ihrer Mitte angebrachten Ventilschließkörper gegen einen Ventilsitz drückt. Der Ventilhub des bekannten Rückschlagventils ist nicht begrenzt, was zu dem Nachteil einer vergleichsweise langen Schließzeit sowie einer hohen Belastung der Scheibenfeder führt. Weiterhin kann bei geöffnetem Rückschlagventil den Ventilschließkörper umströmendes Fluid diesen zu Schwingungen in Richtung seiner Hubbewegung anregen, was zu unerwünschten Schwankungen der Fluiddurchflußmenge führt, die Scheibenfeder zusätzlich dynamisch belastet und Strömungsgeräusche verursachen kann.Disc spring, which presses a valve closing body in the middle against a valve seat. The valve stroke of the known check valve is not limited, which leads to the disadvantage of a comparatively long closing time and a high load on the disc spring. Furthermore, when the check valve is open, fluid flowing around the valve closing body can excite it to vibrate in the direction of its stroke movement, which leads to undesirable fluctuations in the fluid flow rate, which additionally stresses the disc spring dynamically and can cause flow noise.
Vorteile der ErfindungAdvantages of the invention
Beim erfindungsgemäßen Rückschlagventil mit den Merkmalen des Hauptanspruchs ist der Hub des Ventilschließkörpers und damit seine Schließzeit bis zum Aufsetzen auf den Ventilsitz nach vollem Öffnungshub begrenzt. Weiterhin wird der Aufprall des Ventilschließkörpers auf den Ventilsitz beim Schließen vermindert, was den Verschleiß des Ventilsitzes sowie einer bei geschlossenem Rückschlagventil an ihr anliegenden Dichtfläche des Ventilschließkörperε verringert. Auch ein Rückprallen, also ein nochmaliges kurzzeitiges Abheben des Ventilschließkörperε nach dem Aufsetzen auf den Ventilsitz beim Schließen wird durch den Ventilhubbegrenzer vermieden. Der Federweg ist begrenzt und die Feder auf diese Weise vor hoher Belastung, insbesondere vor einer Überlastung geschützt. Eine Schwingungsanregung des Ventilschließkörpers durch ihn umströmendes Fluid bei geöffnetem Rücklagventil wird unterbunden.In the check valve according to the invention with the features of the main claim, the stroke of the valve closing body and thus its closing time until it is placed on the valve seat after a full opening stroke is limited. Furthermore, the impact of the valve closing body on the valve seat reduced when closing, which reduces the wear of the valve seat and a sealing surface of the valve closing body which bears against it when the check valve is closed. The valve stroke limiter also avoids a rebound, that is to say a repeated brief lifting of the valve closing body after being placed on the valve seat when closing. The spring travel is limited and the spring is thus protected against high loads, in particular against overload. Vibration excitation of the valve closing body by the fluid flowing around it when the check valve is open is prevented.
Die Unteransprüche betreffen vorteilhafte Weiterbildungen uncι Verbesserungen der im Hauptanεpruchs angegebenen Erfindung.The subclaims relate to advantageous developments and improvements to the invention specified in the main claim.
Zeichnungdrawing
Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispielε näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing. Show it:
Figur 1 einen Axialschnitt durch ein erfindungsgemäßes Rückschlagventil;Figure 1 shows an axial section through an inventive check valve;
Figur 2 eine Ansicht eines Ventilschließkörpers aus Figur 1 von unten; undFIG. 2 shows a view of a valve closing body from FIG. 1 from below; and
Figuren 3a bis 3c eine Ansicht dreier Ventilschließfedern von oben.Figures 3a to 3c a view of three valve closing springs from above.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Figur 1 zeigt ein erfindungsgemäßes Rückschlagventil, das als Einlaßventil in einen Kolben 10 einer Kolbenpumpe integriert ist. Der Kolben 10 ist in einer Bohrung 12 eines Zylinders 14 in axialer Richtung verschiebbar geführt und mittels eines nicht dargestellten Antriebs zu einer hin- und hergehenden Bewegung (Pfeil f) antreibbar. Zum Einlaß von Fluid weist der Zylinder 14 eine Radialbohrung 16 auf, die über eine breite, umlaufende Nut 18 im Außenumfang des Kolbens 10 und eine durch diesen durchgehende Querbohrung 20 mit einer in axialer Richtung verlaufenden Sackbohrung 22 im Kolben 10 kommuniziert. Die Nut 18 im Kolben 10 ist so breit, daß die Radialbohrung 16 im Zylinder 14 bei jeder Hubstellung des Kolbens 10 in die Nut 18 mündet und dadurch mit der Sackbohrung 22 kommuniziert.Figure 1 shows a check valve according to the invention, which is integrated as an inlet valve in a piston 10 of a piston pump. The piston 10 is guided in a bore 12 of a cylinder 14 so as to be displaceable in the axial direction and by means of a drive (not shown) to and forward movement (arrow f) can be driven. For the inlet of fluid, the cylinder 14 has a radial bore 16 which communicates via a wide circumferential groove 18 in the outer circumference of the piston 10 and a transverse bore 20 passing therethrough with a blind bore 22 in the piston 10 extending in the axial direction. The groove 18 in the piston 10 is so wide that the radial bore 16 in the cylinder 14 opens into the groove 18 at each stroke position of the piston 10 and thereby communicates with the blind bore 22.
Der Kolben 10 bildet ein Ventilgehäuse des erfindungs¬ gemäßen Rückschlagventils. In der Sackbohrung 22 ist ein Ventilschließkörper 24 aufgenommen. Die Sackbohrung 22 führt von einer vorderen, kreisringförmigen Stirnfläche 26 des Kolbens 10 in diesen hinein. Die Sackbohrung 22 ist gestuft, sie weist eine Ringschulter 28 auf, an der sie sich verjüngt und an der ein konischer Ventilsitz 30 ausgebildet ist.The piston 10 forms a valve housing of the check valve according to the invention. A valve closing body 24 is received in the blind bore 22. The blind bore 22 leads from a front, annular end face 26 of the piston 10 into the latter. The blind bore 22 is stepped, it has an annular shoulder 28 on which it tapers and on which a conical valve seat 30 is formed.
Der Ventilschließkörper 24 ist ein rotationssymmetrischeε Kunststoffspritzgußteil. Er weist eine, bei geschlossenem Rückschlagventil am Ventilsitz 30 anliegende, kugelkappen- för ige Dichtfläche 32 auf. Er setzt sich einstückig in einen niedrigen Zylinderabschnitt 34 fort und geht in einen Kegel 36 über, dessen Spitze 38 gerundet ist. Der Ventilschließköper 24 weist drei mit ihm einstückige, über seinen Umfang verteilt angeordnete, radial abstehende und achsparallel verlaufende Führungsrippen 40 auf (Figur 2), mit welchen er an einer Bohrungswand 42 der Sackbohrung 22 in axialer Richtung verschiebbar im Kolben 10 geführt ist.The valve closing body 24 is a rotationally symmetrical plastic injection molded part. It has a sealing cap 32, which rests on the valve seat 30 when the check valve is closed, and has a sealing surface 32. It continues in one piece into a low cylinder section 34 and merges into a cone 36, the tip 38 of which is rounded. The valve closing body 24 has three guide ribs 40 (FIG. 2) that are integral with it, distributed over its circumference, radially projecting and axially parallel, with which it is guided on the bore wall 42 of the blind bore 22 in the piston 10 so as to be axially displaceable.
Der als Spritzgußteil aus Kunststoff hergestellte Ventilschließkörper 24 hat neben seiner einfachen und schnellen Herεtellbarkeit in einem Arbeitsgang den Vorteil, daß er leicht ist und deswegen kurze Öffnungs- und Schließzeiten bei kleinen Betätigungskräften hat. Mit seiner gerundeten Spitze 38 steht der Ventilschlie߬ körper 24 des erfindungsgemäßen Rückschlagventils im Zentrum einer Scheibenfeder 43 auf. Diese ist elastiεch vorgespannt am Kolben 10 angebracht und drückt den Ventilschließkörper 24 mit seiner Dichtfläche 32 gegen den Ventilsitz 30. In ihrem Zentrum weist sie eine Vertiefung 44 zur Aufnahme und Zentrierung der Spitze 38 des Ventilschließkörpers 24 auf.The valve closing body 24 produced as an injection molded part made of plastic has, in addition to its simple and quick producibility in one operation, the advantage that it is light and therefore has short opening and closing times with small actuation forces. With its rounded tip 38, the valve closing body 24 of the check valve according to the invention stands in the center of a disc spring 43. This is attached to the piston 10 in an elastically prestressed manner and presses the valve closing body 24 with its sealing surface 32 against the valve seat 30. At its center, it has a recess 44 for receiving and centering the tip 38 of the valve closing body 24.
Vom Zentrum der Scheibenfeder 43 verlaufen zwei Federεtege 46 der Scheibenfeder 43 spiralförmig nach außen und gehen dort einstückig in einen umlaufend geschlossen ausgebildeten Umfangsrand 48 der Scheibenfeder 43 über (Figur 3a). Zwischen den Federεtegen 46 befinden εich große Ausnehmungen 50, die einen großflächigen Fluiddurchlaß bilden.From the center of the disc spring 43, two spring webs 46 of the disc spring 43 extend spirally outward and there merge into a circumferentially closed peripheral edge 48 of the disc spring 43 (FIG. 3a). Large recesses 50, which form a large-area fluid passage, are located between the spring webs 46.
Die Scheibenfeder 43 wird als Blechεtanzteil hergestellt. Bei kleinem Durchmesser kann sie auch in einem Ätzverfahren hergestellt werden. Sie besteht in diesem Fall beispielsweise aus Kupfer oder aus einer Kupferlegierung.The disc spring 43 is manufactured as a sheet metal stamping. With a small diameter, it can also be produced in an etching process. In this case, it consists, for example, of copper or a copper alloy.
Der Umfangsrand 48 der Scheibenfeder 43 wird von einem Ventilhubbegrenzungsteil 52 in Anlage an der kreisring¬ förmigen vorderen Stirnfläche 26 des Kolbens 10 gehalten. Das Ventilhubbegrenzungsteil 52 weist einen niedrigen Hohlzylinderabschnitt 54 auf, der ein vorderes Stirnende 56 des Kolbens 10 umgreift. Ein freier Rand 58 des Hohlzylinderabschnitts 54 ist durch Bördeln in eine umlaufende Nut 60 im Kolben 10 an dessen vorderem Stirnende 56 hineingreifend verformt, das Ventilhubbegrenzungsteil 52 ist auf dieεe Weise mit dem Kolben 10 verbunden. Der Kolben 10 ist an seinem vorderen Stirnende 56 etwas verjüngt, zwischen dem Hohlzylinderabschnitt 54 desThe peripheral edge 48 of the disc spring 43 is held by a valve stroke limiting part 52 in contact with the annular front end face 26 of the piston 10. The valve stroke limiting part 52 has a low hollow cylinder section 54 which engages around a front end 56 of the piston 10. A free edge 58 of the hollow cylinder section 54 is deformed into a circumferential groove 60 in the piston 10 so that it engages at its front end 56, and the valve stroke limiting part 52 is connected to the piston 10 in this way. The piston 10 is slightly tapered at its front end 56 between the hollow cylinder section 54 of the
Ventilhubbegrenzungsteilε 52 und der Zylinderbohrung 12 besteht ein Radialspalt. An der vorderen Stirnfläche 26 des Kolbens 10 geht der Hohlzylinderabschnitt 54 des Ventilhubbegrenzungsteis 52 einstückig in einen radial nach innen stehenden Flansch 62 über. Auf dem Flansch 62 liegt der Umfangsrand 48 derValve stroke limiting part 52 and the cylinder bore 12 there is a radial gap. At the front end face 26 of the piston 10, the hollow cylinder section 54 of the valve stroke limiting part 52 merges in one piece into a radially inwardly extending flange 62. On the flange 62 is the peripheral edge 48 of the
Scheibenfeder 43 auf und wird von diesem in Anlage an der vorderen Stirnfläche 26 des Kolbens 10 gehalten. An zwei Stellen 64 iεt der U fangεrand 48 der Scheibenfeder 43 mit dem Flansch 62 des Ventilhubbegrenzungsteils 52 verschweißt. Durch das Verbinden der Scheibenfeder 43 mit dem Ventilhubbegrenzungsteil 52 wird die Scheibenfeder 43 gut handhabbar, was beim Zusammenbau des erfindungsgemäßen Rückschlagventilε insbeεondere dann von Vorteil iεt, wenn deεsen Abmessungen klein sind. Weiterer Vorteil ist, daß die richtige Montage aller Teile des erfindungsgemäßenDisc spring 43 and is held by this in contact with the front end face 26 of the piston 10. At two points 64, the circumferential edge 48 of the disc spring 43 is welded to the flange 62 of the valve stroke limiting part 52. By connecting the disc spring 43 to the valve stroke limiting part 52, the disc spring 43 is easy to handle, which is particularly advantageous when assembling the check valve according to the invention if its dimensions are small. Another advantage is that the correct assembly of all parts of the invention
Rückschlagventils im Kolben 10 optisch kontrolliert werden kann.Check valve in the piston 10 can be checked optically.
Zur Begrenzung des Hubs des Ventilschließkörperε 24 beim Öffnen (Ventilhub) weist das Ventilhubbegrenzungsteil 52 einen mit ihm einstückigen Quersteg 66 auf, der von der Sackbohrung 22 im Kolben 10 aus gesehen nach außen gewölbt an zwei einander diametral gegenüberliegenden Stellen in den Flansch 62 des Ventilhubbegrenzungsteils 52 übergeht. Durch seine Wölbung hat der Quersteg 66 einen Abstand in axialer Richtung vom Zentrum der Scheibenfeder 43 bei geschloεεenem Rückschlagventil. Auf diesen Abstand εind die Auslenkung der Scheibenfeder 43 und der Hub des Ventil¬ schließkörpers 24 begrenzt. Durch die Art der Ausbildung von Scheibenfeder 43 und Ventilhubbegrenzungsteil 52 ist die erforderliche Bauhöhe des erfindungsgemäßen Rückεchlag- ventilε klein.In order to limit the stroke of the valve closing body 24 when opening (valve stroke), the valve stroke limiting part 52 has a crosspiece 66 which is integral with it and which, viewed from the blind bore 22 in the piston 10, bulges outward at two diametrically opposite points in the flange 62 of the valve stroke limiting part 52 transforms. Due to its curvature, the transverse web 66 is at a distance in the axial direction from the center of the disc spring 43 when the check valve is closed. The deflection of the disk spring 43 and the stroke of the valve closing body 24 are limited to this distance. Due to the nature of the design of the disc spring 43 and the valve stroke limiting part 52, the required overall height of the check valve according to the invention is small.
Da zwiεchen dem Querεteg 66 und dem Flansch 62 des Ventilhubbegrenzungsteils 52 große Öffnungen bestehen (Figur 3a), steht auch hier eine großflächige Fluiddurchtrittεflache zur Verfügung. Insgeεa t weiεt daε erfindungsgemäße Rückschlagventil durch die Ausbildung seiner Scheibenfeder 43 und des Ventilhubbegrenzungsteils 52 große Strömungεguerεchnitte und dadurch geringen Strömungswiderstand auf.Since there are large openings between the crosspiece 66 and the flange 62 of the valve stroke limiting part 52 (FIG. 3a), a large-area fluid passage area is also available here. In total, the check valve according to the invention knows through the design of its disc spring 43 and the valve stroke limiting part 52 large flow sections and therefore low flow resistance.
An Stelle der Scheibenfeder 43 kann eine Blattfeder 67 im erfindungsgemäßen Rückschlagventil eingebaut sein (Figur 3b) . Diese verläuft in etwa deckungsgleich mit dem Quersteg 66 des Ventilhubbegrenzungsteils 52 und ist an ihrem einen Ende 68 mit dessen Flansch 62 verschweißt. Ihr nicht mit dem Flansch 62 verschweißtes Ende 69 liegt auf dem Flansch 62 auf und kann sich während des Federnε auf dem Flanεch 62 in radialer Richtung verεchieben. In ihrer Mitte weist die Blattfeder 67 eine Vertiefung 70 für die Spitze 38 des Ventilschließkörperε 24 auf.Instead of the disc spring 43, a leaf spring 67 can be installed in the check valve according to the invention (FIG. 3b). This extends approximately congruently with the transverse web 66 of the valve stroke limiting part 52 and is welded at one end 68 to the flange 62 thereof. Its end 69, which is not welded to the flange 62, rests on the flange 62 and can move in the radial direction on the flange 62 during springing. In the middle, the leaf spring 67 has a recess 70 for the tip 38 of the valve closing body 24.
Anstelle der durchgehenden Blattfeder 67 kann auch eine Blattfeder 72 in das erfindungsgemäße Rückschlagventil eingebaut werden, die im Zentrum des Ventilhubbegrenzungε- teils 52 endet (Figur 3c). Zusammen mit einem ebenfallε nicht durchgehenden Arm 74 zur Begrenzung deε Ventilhubε anstelle des Querstegs 66 bringt dies eine noch größere Fluiddurchtrittsflache. Ein auf dem Flansch 62 deε Ventil¬ hubbegrenzungsteils 52 aufliegendes Ende 75 der Blattfeder 72 ist mit dem Flansch 62 verschweißt. Die Blattfeder 72 weist ebenfalls eine Vertiefung 76 für die Spitze 38 des Ventilschließkörpers 24 auf. Instead of the continuous leaf spring 67, a leaf spring 72 can also be installed in the check valve according to the invention, which ends in the center of the valve stroke limiting part 52 (FIG. 3c). Together with an equally non-continuous arm 74 for limiting the valve stroke instead of the crosspiece 66, this results in an even larger fluid passage area. An end 75 of the leaf spring 72 resting on the flange 62 of the valve stroke limiting part 52 is welded to the flange 62. The leaf spring 72 also has a recess 76 for the tip 38 of the valve closing body 24.

Claims

Patentansprüche claims
1. Rückschlagventil mit einem Ventilschließkörper, der von einem flachen Federelement gegen einen Ventilsitz gedrückt wird, gekennzeichnet durch einen Ventilhubbegrenzer (52), der auf einer dem Ventilschließkörper (24) abgewandten Seite des Federelements (43, 67, 72) mit Abstand zu diesem angeordnet ist.1. Check valve with a valve closing body, which is pressed by a flat spring element against a valve seat, characterized by a valve stroke limiter (52), which is arranged on a side of the spring element (43, 67, 72) facing away from the valve closing body (24) at a distance from the latter is.
2. Rückschlagventil nach Anspruch 1, dadurch gekennzeichnet, daß der Ventilhubbegrenzer (52) einen den Hub des Ventilschließkörpers (24) begrenzenden Steg (66) oder Arm (74) aufweist.2. Check valve according to claim 1, characterized in that the valve stroke limiter (52) has a stroke of the valve closing body (24) limiting web (66) or arm (74).
3. Rückschlagventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Federelement eine Scheibenfeder (43) oder eine Blattfeder (67, 72) iεt.3. Check valve according to claim 1 or 2, characterized in that the spring element is a disc spring (43) or a leaf spring (67, 72) iεt.
4. Rückschlagventil nach Anspruch 3, dadurch gekennzeichnet, daß das Federelement eine Scheibenfeder (43) mit spiralförmig verlaufenden Federstegen (46) ist.4. Check valve according to claim 3, characterized in that the spring element is a disc spring (43) with spiral spring webs (46).
5. Rückschlagventil nach einem der vorhergehenden5. Check valve according to one of the preceding
Ansprüche, dadurch gekennzeichnet, daß das Federelement (43, 67, 72) mit dem Ventilhubbegrenzer (52) verbunden ist. Claims, characterized in that the spring element (43, 67, 72) is connected to the valve stroke limiter (52).
6. Rückschlagventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Ventilschließkörper (24) ein im wesentlichen rotationssymmetrisches Teil ist, das eine kugelkappen- oder kugelringförmige Dichtfläche (32), eine der Dichtfläche (32) abgewandte, ihr gegenüberliegend angeordnete Spitze (38), mit der eε auf dem Federelement (43, 67, 72) aufεteht, und mindestens drei, in radialer Richtung abstehende Führungsstege (40) aufweist.6. Non-return valve according to one of the preceding claims, characterized in that the valve closing body (24) is a substantially rotationally symmetrical part, which has a spherical cap or spherical ring-shaped sealing surface (32), one of the sealing surface (32) facing away from it, its tip (38 ) with which eε stands on the spring element (43, 67, 72) and has at least three guide webs (40) projecting in the radial direction.
7. Rückschlagventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der7. Check valve according to one of the preceding claims, characterized in that the
Ventilschließkörper (24) aus Kunststoff besteht.Valve closing body (24) consists of plastic.
8. Rückschlagventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Federelement (43, 67, 72) eine Vertiefung (44) oder Loch zur Aufnahme des Ventilschließkörpers (24) aufweist. 8. Check valve according to one of the preceding claims, characterized in that the spring element (43, 67, 72) has a recess (44) or hole for receiving the valve closing body (24).
EP95937787A 1994-12-20 1995-11-22 Check valve Withdrawn EP0770196A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4445361 1994-12-20
DE4445361A DE4445361A1 (en) 1994-12-20 1994-12-20 check valve
PCT/DE1995/001624 WO1996019687A2 (en) 1994-12-20 1995-11-22 Check valve

Publications (1)

Publication Number Publication Date
EP0770196A2 true EP0770196A2 (en) 1997-05-02

Family

ID=6536315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95937787A Withdrawn EP0770196A2 (en) 1994-12-20 1995-11-22 Check valve

Country Status (6)

Country Link
EP (1) EP0770196A2 (en)
JP (1) JPH09509727A (en)
KR (1) KR970701324A (en)
CN (1) CN1141669A (en)
DE (1) DE4445361A1 (en)
WO (1) WO1996019687A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5775886A (en) * 1996-08-08 1998-07-07 Terwilliger; Gerald L. Gas compressor with reciprocating piston with valve sheath
DE19732810B4 (en) * 1997-07-30 2013-05-23 Robert Bosch Gmbh Check valve, in particular for a piston pump
DE102004035452A1 (en) * 2004-07-22 2006-02-16 Robert Bosch Gmbh Piston pump with improved pressure build-up dynamics
DE102010062174A1 (en) * 2010-11-30 2012-05-31 Robert Bosch Gmbh Valve, in particular an outlet valve of a hydraulic piston pump
DE102016204117B3 (en) * 2016-03-14 2017-08-10 Robert Bosch Gmbh Pressure medium control valve, in particular for controlling the flow direction in a pressure medium connection
CN112013138B (en) * 2020-08-07 2021-07-13 厦门大学 One-way valve and plasma synthetic jet actuator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2018130A (en) * 1933-09-18 1935-10-22 Robert J Jauch Check valve
FR1584876A (en) * 1968-10-03 1970-01-02
DE3233268A1 (en) * 1982-09-08 1984-03-08 Robert Bosch Gmbh, 7000 Stuttgart Hydraulic valve
DE3329652A1 (en) * 1983-08-17 1985-02-28 Steuerungstechnik Staiger GmbH & Co Produktions-Vertriebs-KG, 7121 Erligheim Non-return valve
US4856555A (en) * 1988-09-01 1989-08-15 Nupro Company Check valve
DE9016775U1 (en) * 1990-12-12 1992-04-09 Robert Bosch Gmbh, 7000 Stuttgart, De

Non-Patent Citations (1)

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Title
See references of WO9619687A2 *

Also Published As

Publication number Publication date
JPH09509727A (en) 1997-09-30
KR970701324A (en) 1997-03-17
WO1996019687A2 (en) 1996-06-27
WO1996019687A3 (en) 1996-08-29
DE4445361A1 (en) 1996-06-27
CN1141669A (en) 1997-01-29

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