EP1985855A1 - Piston of an oscillating piston pump - Google Patents
Piston of an oscillating piston pump Download PDFInfo
- Publication number
- EP1985855A1 EP1985855A1 EP08155014A EP08155014A EP1985855A1 EP 1985855 A1 EP1985855 A1 EP 1985855A1 EP 08155014 A EP08155014 A EP 08155014A EP 08155014 A EP08155014 A EP 08155014A EP 1985855 A1 EP1985855 A1 EP 1985855A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- spring
- channel
- annular groove
- outlet
- 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- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
- F04B53/125—Reciprocating valves
- F04B53/126—Ball valves
Definitions
- the invention relates to an oscillating piston pump, in particular a piston for a vibrating piston pump.
- the piston has a channel connecting the end faces and a check valve, with a loaded by a spring element against the valve seat sealing element.
- the valve seat of the check valve is an extension of the channel.
- Oscillating piston pumps of the type mentioned in the introduction are commercially available.
- the sealing element and then the spring are inserted into the channel. Thereafter, a collar is crimped at the outlet end of the channel.
- the flanged collar serves as an abutment for the spring element.
- Oscillating piston pumps still have at least one additional check valve, namely at the inlet and / or at the outlet. These valves are in principle identical to the check valve in the piston, i. Even with these valves, the spring is fixed by crimping a collar.
- the invention has for its object to provide a vibrating piston pump with improved efficiency.
- the piston has a channel connecting the end faces and a non-return valve provided by a spring element, e.g. a coil spring, against the valve seat loaded sealing element.
- the valve seat of the check valve is an extension of the channel.
- the piston differs from the known pistons in that the channel between the valve seat and the outlet-side end face of the piston has an annular groove whose outlet-side boundary is an abutment for the spring element. This abutment allows accurate positioning of the spring element and thus also of the sealing element to the valve seat. In addition, it can be ensured that the sealing element, when it is displaced by fluid pressure against the spring element, is guided by the spring element in the axial direction, relative to the longitudinal axis of the channel. This reduces the flow resistance of the valve.
- the invention is based on the finding that, when the spring element is fixed by crimping a collar, the position of the spring in the channel is not precisely determined.
- the longitudinal axis of the spring element is tilted against that of the channel, whereby the efficiency and the maximum delivery rate at a given discharge pressure of the pump is reduced.
- the annular groove defines the position of the spring in the channel with high precision. Accordingly, the efficiency of the pump can be increased.
- the improvement of the oscillating piston pump It has a suction side with a pump inlet and a pressure side with a pump outlet.
- the pump inlet and the pump outlet are connected by a channel.
- In the channel is at least one check valve.
- the check valve has a by a spring element against a valve seat loaded sealing element, wherein the valve seat of the check valve is an extension of the channel.
- the channel has an annular groove between the valve seat and the outlet of the valve. The outlet-side boundary of the annular groove is an abutment for the spring element.
- the check valve may be at the inlet or at the outlet of the oscillating piston pump. Of course it can also be in the piston.
- Embodiments of the invention which essentially relate to the check valve and the check valves, respectively, will be described below.
- the valves have in common that they have an annular groove in a channel as an abutment for the spring element.
- the spring element is supported via a spring plate on the outlet-side boundary of the annular groove.
- the spring plate allows the use of narrow spring elements, i. of spring elements with an outer diameter, which can be significantly smaller than the Ringnut matmesser. As a result, the flow resistance of the valve can be further reduced.
- an elastic O-ring Preferably, between the spring plate and the inlet-side and / or outlet-side boundary of the annular groove is an elastic O-ring.
- the spring plate has at least three of the longitudinal axis of the channel star-shaped outgoing webs which engage in the annular groove.
- the webs in the middle of a small plate that can serve as an attachment for the spring element.
- the webs are preferably somewhat elastic, so that the spring plate can be inserted into the annular groove.
- the spring plate is tapered in the area in which it engages in the annular groove, it can be particularly easily inserted into the annular groove.
- the spring plate is particularly stable. A possible tilting of the spring element, which leads to a pendulum movement of the sealing element in the flow is counteracted by the ring segments.
- the spring plate may have a ring segment inserted into the annular groove, on which there are at least three webs which point radially inwards and which support the spring element.
- the ends of the ring segment are slightly compressed, whereby the diameter of the ring segment is reduced.
- the ring segment can now be introduced into the annular groove. If the ends of the ring segment relieved, then the diameter increases the ring segment again and it braces against the radial boundary of the annular groove.
- the two ends of the ring segment each have a recess, you can engage in the recesses with a tool and tighten the ring segment for mounting.
- the ends can also be angled, in particular each have an undercut, which is engaged behind with a tool for contraction of the ring.
- the radially inwardly pointing ends of the webs may be angled against the flow direction. Preferably, they are angled parallel to the longitudinal axis of the channel in the inlet direction and engage in the spring element. As a result, the spring element can be fixed radially in the channel.
- At least the inlet-side surfaces of the webs preferably the webs as such, starting from the longitudinal axis of the channel after the half outlet-side inner diameter of the spring element in the direction of the outlet.
- the spring plate In the area of the free inner diameter of the spring element has the spring plate thus, a projection which engages the spring element and radially stabilizes it in its position without obstructing the flow.
- the length of the projection corresponds to the length of the spring element at nominal opening of the valve.
- the length of the projection is to be shortened accordingly.
- the length of the projection preferably corresponds to the length of the spring element at nominal opening minus the depth of the engaging part of the sealing element.
- the projection supports the spring element radially without obstructing the flow of the fluid to be pumped. A radial vibration of the spring element in the flow, which corresponds to a pendulum movement of the sealing element, is prevented.
- the inlet-side surfaces of the webs preferably the webs themselves, spring from the center to the half outlet-side outer diameter of the spring element in the direction of the inlet, then they form a trough which holds the spring element.
- the walls of the tub support the spring element radially.
- the inlet-side surfaces of the jounce-like webs also radially support the sealing element at an opening of the valve to its nominal width.
- the trough is funnel-shaped on the inlet side. This prevents tilting of the sealing element.
- the webs are arranged rotationally symmetrical to the longitudinal axis of the channel.
- the spring plate catches the spring element evenly, it does not tilt against the longitudinal axis of the channel.
- the spring plate is preferably the annular groove clipped.
- the spring element When opening the valve to its nominal opening, the spring element is preferably compressed to a maximum. In a helical spring then the individual turns are contiguous. Thereby an axial and also radial vibration, e.g. prevents a pendulum movement of the sealing element in the flow.
- the piston 10 in FIG. 1 has a channel 11 for the fluid to be pumped.
- An arrow in the channel 11 symbolizes the flow direction.
- the left end side is the inlet side 18 and the right end side is the outlet side 19 of the piston 10.
- the channel 11 is flared on the outlet side in order to receive a check valve.
- the widened area of the channel 11 serves as the valve space 12.
- the widening of the channel 11 to the valve space 12 is conical, the conical widening being the valve seat 17, ie the check valve is in integrated the channel.
- the channel 11 has in the valve chamber 12 an annular groove 13 with an inlet-side boundary 14 and an outlet-side boundary 15.
- a spring plate 50 is clipped, which abuts the outlet-side boundary 15 of the annular groove 13 and is supported there. Between the spring plate 50 and the inlet-side boundary 14 of the annular groove 13 sits an O-ring 40 for noise reduction.
- a spring 30 is supported, which tapers conically in the inlet direction in the outer diameter.
- a ball 20 is pressed by the spring 30 against the valve seat 17, that closes this.
- FIG. 2 shows a section of a greatly enlarged longitudinal section of the piston 10.
- the stem 27 engages in a cylindrical coil spring 35, the sealing element.
- the check valve is opened to its nominal size.
- the bottom 26 of the sealing element 25 is seated on the spring plate 50.
- An axial vibration of the sealing element 25 is thus excluded.
- a radial vibration of the sealing element 25 and the coil spring 35 is excluded, because the stem 27 engages in the interior of the coil spring 35, whereby the coil spring 35 and the sealing element 25 lead each other radially.
- FIG. 3 the spring plate 50, the coil spring 35 and the sealing element 25 are made FIG. 2 shown again, now the coil spring 35 is relaxed.
- FIG. 4 shows a view of the spring plate 50 from the FIGS. 1 to 3 .
- the spring plate 50 has four outgoing from a plate 56 in the middle of the spring plate 50 webs 55.
- the webs jump, starting from the center, in the region 58 in the outlet direction.
- the webs 55 are interconnected by ring segments 51.
- the radially outwardly facing ends of the webs 55 are tapered.
- the tapered portions are clipped for mounting the spring plate 50 in the annular groove 13 of the channel 11 (see. Fig.1 and Fig.2 ).
- the plate 56 forms a projection which supports the spring (see. Fig. 1 to Fig.3 ).
- FIGS. 5a and 5b show one to the spring plate 50 in the FIGS. 1 to 4 Alternative spring plate 60.
- the spring plate 60 has four of a central plate 66 outgoing webs 65.
- the webs 65 jump in the area 68, starting from the center in the inlet direction.
- the webs 65 are interconnected by ring segments 61.
- the radially outwardly facing ends of the webs 65 are tapered.
- the tapered portions are clipped for mounting the spring plate 60 in the annular groove 13 of the channel 11.
- the plate 66 forms the bottom of a trough on which the spring is supported.
- the pan can be made much deeper, so that it intercepts the spring laterally (ie radially) and prevents a pendulum movement of the sealing element.
- the spring plate in Fig. 6a to Fig. 6c is an evolution of the spring plate in Fig. 5a and 5b .
- the valve When operating the oscillating piston pump, the valve is opened at short intervals and closed again. By the appropriate constantly recurring compression and relief of the usually wound spring element, this rotates about its longitudinal axis. There is a risk that the resting on the spring plate 60 end of the spring element 30 or 35 hangs on one of the webs 65. In this case, the web 65 is threaded between the turns of the spring element 30 or 35. Due to the further rotation of the spring element 30, 35, this pushes through the openings between the webs 65 therethrough. As a result, the closing force which exerts the spring element on the sealing element and the check valve drops out decreases.
- the spring plate 70 in Fig. 6a to Fig. 6c a central plate 76 emanating from the four radial webs 75, however, the plate 76 has a in the top view ( Fig. 6b ) circular recess 76a, with a diameter D (see. Fig. 6c ) which corresponds to the outer diameter of the spring element, so that in the mounted state, the spring element rests on the circular recess 76 a.
- the radial boundary 76b of the recess 76a is annular closed, therefore, the end of the spring element can not get stuck on one of the webs 75 and this does not thread between the turns of the spring element.
- the spring element is radially fixed by the radial boundary 76b of the recess 76a.
- the outwardly facing ends 79 of the webs 75 are in cross section (see. Fig. 6c ) tapers and engage in the assembled state analogously Fig. 1 and Fig. 2 in the annular groove 13 of the channel 11 a.
- FIG. 7 are the ends of two differently tapered webs, such as the webs 55 or 65 in the Figures 1 to 5b , shown. Both tapers are wedge-shaped in cross-section and suitable for clipping in the annular groove of a channel.
- FIG. 8 shows a further spring plate 80.
- the spring plate has an almost closed ring to the ring segment 81, which can be clamped in an annular groove in a channel. From the ring segment go three webs 85 radially inward. The ends 86 of the webs 85 are angled and engage in a reference characterless spring element. Below the spring element, the webs 85 as a support for the spring element ring segment-like spacers 87th
- FIGS. 9 to 11 schematically show further spring plate 90, 100 and 110.
- the spring plates each have a ring segment 91, 101 and 111, that can be clamped in an annular groove of a channel.
- the ring segments 91, 101 and 111 go webs 95, 105 and 115 radially inward.
- the webs 105 and 115 widened T-shaped in the region of the support for the spring.
- the widened ends serve as a support for a spring element.
- the spring plate in FIG. 9 and FIG. 10 have at the two ends of the ring segments 91 and 101 each have an opening 92 and 102.
- the ring segment 111 fulfill the same purpose FIG. 11 : They can also be used to insert the spring plate 110 with a circlip pliers behind.
- FIGS. 12 and 13 show a very simple and inexpensive spring plate 120. This consists only of three symmetrically arranged webs 125. The webs jump as based on FIG. 4 described.
- the spring plate 140 in FIG. 14 corresponds to that in the FIGS. 12 and 13 shown, wherein the spring plate 140, however, four webs 145 has.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Schwingkolbenpumpe, insbesondere einen Kolben für eine Schwingkolbenpumpe. Der Kolben hat einen die Stirnseiten verbindenden Kanal und ein Rückschlagventil, mit einem durch ein Federelement gegen den Ventilsitz belastetem Dichtelement. Der Ventilsitz des Rückschlagventils ist eine Erweiterung des Kanals.The invention relates to an oscillating piston pump, in particular a piston for a vibrating piston pump. The piston has a channel connecting the end faces and a check valve, with a loaded by a spring element against the valve seat sealing element. The valve seat of the check valve is an extension of the channel.
Schwingkolbenpumpen der einleitend genannten Gattung sind im Handel erhältlich. Zur Montage der Kolben werden das Dichtelement und anschließend die Feder in den Kanal eingesetzt. Danach wird ein Kragen am auslassseitigen Ende des Kanals umgebördelt. Der umgebördelte Kragen dient als Widerlager für das Federelement.Oscillating piston pumps of the type mentioned in the introduction are commercially available. To install the piston, the sealing element and then the spring are inserted into the channel. Thereafter, a collar is crimped at the outlet end of the channel. The flanged collar serves as an abutment for the spring element.
Schwingkolbenpumpen haben noch mindestens ein weiteres Rückschlagventil, nämlich am Einlass und/oder am Auslass. Diese Ventile sind im Prinzip identisch zu dem Rückschlagventil im Kolben, d.h. auch bei diesen Ventilen wird die Feder durch umbördeln eines Kragens fixiert.Oscillating piston pumps still have at least one additional check valve, namely at the inlet and / or at the outlet. These valves are in principle identical to the check valve in the piston, i. Even with these valves, the spring is fixed by crimping a collar.
Der Erfindung liegt die Aufgabe zugrunde eine Schwingkolbenpumpe mit verbessertem Wirkungsgrad bereitzustellen.The invention has for its object to provide a vibrating piston pump with improved efficiency.
Die Aufgabe ist durch eine Schwingkolbenpumpe bzw. einen Kolben nach den unabhängigen Ansprüchen gelöst.The object is achieved by an oscillating piston pump or a piston according to the independent claims.
Der Kolben hat einen die Stirnseiten verbindenden Kanal und ein Rückschlagventil, das ein durch ein Federelement, z.B. eine Schraubenfeder, gegen den Ventilsitz belastetes Dichtelement hat. Der Ventilsitz des Rückschlagventils ist eine Erweiterung des Kanals. Der Kolben unterscheidet sich von den bekannten Kolben dadurch, dass der Kanal zwischen dem Ventilsitz und der auslassseitigen Stirnseite des Kolbens eine Ringnut hat, deren auslassseitige Begrenzung ein Widerlager für das Federelement ist. Dieses Widerlager ermöglicht eine genaue Positionierung des Federelementes und damit auch des Dichtelementes zum Ventilsitz. Zudem kann sichergestellt werden, dass das Dichtelement, wenn es durch Flüssigkeitsdruck gegen das Federelement verschoben wird durch das Federelement in axialer Richtung, bezogen auf die Längsachse des Kanals, geführt wird. Dadurch wird der Strömungswiderstand des Ventils reduziert.The piston has a channel connecting the end faces and a non-return valve provided by a spring element, e.g. a coil spring, against the valve seat loaded sealing element. The valve seat of the check valve is an extension of the channel. The piston differs from the known pistons in that the channel between the valve seat and the outlet-side end face of the piston has an annular groove whose outlet-side boundary is an abutment for the spring element. This abutment allows accurate positioning of the spring element and thus also of the sealing element to the valve seat. In addition, it can be ensured that the sealing element, when it is displaced by fluid pressure against the spring element, is guided by the spring element in the axial direction, relative to the longitudinal axis of the channel. This reduces the flow resistance of the valve.
Grundlage der Erfindung ist die Erkenntnis, dass bei einer Fixierung des Federelementes durch Umbördeln eines Kragens die Position der Feder in dem Kanal nicht genau bestimmt ist. In der Regel ist die Längsachse des Federelementes gegen die des Kanals verkippt, wodurch der Wirkungsgrad als auch die maximale Fördermenge bei einem gegebenen Förderdruck der Pumpe reduziert wird. Durch die Ringnut wird die Position der Feder in dem Kanal mit hoher Präzision definiert. Entsprechend kann der Wirkungsgrad der Pumpe erhöht werden.The invention is based on the finding that, when the spring element is fixed by crimping a collar, the position of the spring in the channel is not precisely determined. In general, the longitudinal axis of the spring element is tilted against that of the channel, whereby the efficiency and the maximum delivery rate at a given discharge pressure of the pump is reduced. The annular groove defines the position of the spring in the channel with high precision. Accordingly, the efficiency of the pump can be increased.
Auf der gleichen Erkenntnis beruht die Verbesserung der Schwingkolbenpumpe. Sie hat eine Saugseite mit einem Pumpeneinlass und eine Druckseite mit einem Pumpenauslass. Der Pumpeneinlass und der Pumpenauslass sind durch einen Kanal miteinander verbunden. In dem Kanal ist mindestens ein Rückschlagventil. Das Rückschlagventil hat ein durch ein Federelement gegen einen Ventilsitz belastetes Dichtelement, wobei der Ventilsitz des Rückschlagventils eine Erweiterung des Kanals ist. Der Kanal hat zwischen dem Ventilsitz und dem Auslass des Ventils eine Ringnut. Die auslassseitige Begrenzung der Ringnut ist ein Widerlager für das Federelement. Insbesondere kann das Rückschlagventil am Einlass oder am Auslass der Schwingkolbenpumpe sein. Natürlich kann es auch im Kolben sein.Based on the same knowledge, the improvement of the oscillating piston pump. It has a suction side with a pump inlet and a pressure side with a pump outlet. The pump inlet and the pump outlet are connected by a channel. In the channel is at least one check valve. The check valve has a by a spring element against a valve seat loaded sealing element, wherein the valve seat of the check valve is an extension of the channel. The channel has an annular groove between the valve seat and the outlet of the valve. The outlet-side boundary of the annular groove is an abutment for the spring element. In particular, the check valve may be at the inlet or at the outlet of the oscillating piston pump. Of course it can also be in the piston.
Nachfolgend werden Ausgestaltungen der Erfindung, die im Wesentlichen das Rückschlagventil bzw. die Rückschlagventile betreffen, beschrieben. Die Ventile haben gemeinsam, dass sie eine Ringnut in einem Kanal als Widerlager für das Federelement haben.Embodiments of the invention, which essentially relate to the check valve and the check valves, respectively, will be described below. The valves have in common that they have an annular groove in a channel as an abutment for the spring element.
Vorzugsweise stützt sich das Federelement über einen Federteller an der auslassseitigen Begrenzung der Ringnut ab. Der Federteller ermöglicht die Verwendung schmaler Federelemente, d.h. von Federelementen mit einem Außendurchmesser, der deutlich kleiner als der Ringnutdurchmesser sein kann. Dadurch kann der Strömungswiderstand des Ventils weiter reduziert werden.Preferably, the spring element is supported via a spring plate on the outlet-side boundary of the annular groove. The spring plate allows the use of narrow spring elements, i. of spring elements with an outer diameter, which can be significantly smaller than the Ringnutdurchmesser. As a result, the flow resistance of the valve can be further reduced.
Bevorzugt ist zwischen dem Federteller und der einlassseitigen und/oder auslassseitigen Begrenzung der Ringnut ein elastischer O-Ring. Diese reduzieren eine Schallübertragung vom Dichtelement insbesondere beim Schließen des Ventils auf den Kolben und dienen somit zu Geräuschdämpfung. Gleichzeitig werden ggf. Eigenschwingungen des Federelementes gedämpft; dies verbessert das Schließ- und Öffnungsverhalten des Ventils.Preferably, between the spring plate and the inlet-side and / or outlet-side boundary of the annular groove is an elastic O-ring. These reduce a sound transmission from the sealing element, in particular when closing the valve on the piston and thus serve to reduce noise. At the same time, if necessary, natural oscillations of the spring element are damped; this improves the closing and opening behavior of the valve.
In einer Ausführungsform hat der Federteller mindestens drei von der Längsachse des Kanals sternförmig ausgehende Stege, die in die Ringnut eingreifen. Bevorzugt bilden die Stege in der Mitte eine kleine Platte, die als Anlage für das Federelement dienen kann. Die Stege sind bevorzugt etwas elastisch, damit der Federteller in die Ringnut eingesetzt werden kann.In one embodiment, the spring plate has at least three of the longitudinal axis of the channel star-shaped outgoing webs which engage in the annular groove. Preferably, the webs in the middle of a small plate that can serve as an attachment for the spring element. The webs are preferably somewhat elastic, so that the spring plate can be inserted into the annular groove.
Wenn der Federteller in dem Bereich, in dem er in die Ringnut eingreift, verjüngt ist, lässt er sich besonders leicht in die Ringnut einsetzen.If the spring plate is tapered in the area in which it engages in the annular groove, it can be particularly easily inserted into the annular groove.
Wenn benachbarte Stege durch Ringsegmente miteinander verbunden sind, wobei zwischen den Ringsegmenten und der Mitte des Federtellers ein Durchlass für das zu pumpende Fluid ist, ist der Federteller besonders stabil. Einer möglichen Verkippung des Federelementes, die zu einer Pendelbewegung des Dichtelementes in der Strömung führt wird durch die Ringsegmente entgegengewirkt.If adjacent webs are connected by ring segments, wherein between the ring segments and the center of the spring plate is a passage for the fluid to be pumped, the spring plate is particularly stable. A possible tilting of the spring element, which leads to a pendulum movement of the sealing element in the flow is counteracted by the ring segments.
Alternativ kann der Federteller ein in die Ringnut eingesetztes Ringsegment haben, an dem mindestens 3 Stege sind, die radial nach innen weisen und die das Federelement haltern. Zur Montage werden die Enden des Ringsegmentes etwas zusammengedrückt, wodurch der Durchmesser des Ringsegmentes reduziert wird. Das Ringsegment kann nun in die Ringnut eingebracht werden. Werden die Enden des Ringsegmentes entlastet, dann erhöht sich der Durchmesser des Ringsegmentes wieder und es verspannt sich gegen die radiale Begrenzung der Ringnut.Alternatively, the spring plate may have a ring segment inserted into the annular groove, on which there are at least three webs which point radially inwards and which support the spring element. For assembly, the ends of the ring segment are slightly compressed, whereby the diameter of the ring segment is reduced. The ring segment can now be introduced into the annular groove. If the ends of the ring segment relieved, then the diameter increases the ring segment again and it braces against the radial boundary of the annular groove.
Wenn die beiden Enden des Ringsegmentes je eine Ausnehmung haben, kann man in die Ausnehmungen mit einem Werkzeug eingreifen und zur Montage das Ringsegment zusammenziehen. Alternativ können die Enden auch abgewinkelt sein, insbesondere je eine Hinterschneidung haben, die mit einem Werkzeug zum Zusammenziehen des Ringes hintergreifbar ist.If the two ends of the ring segment each have a recess, you can engage in the recesses with a tool and tighten the ring segment for mounting. Alternatively, the ends can also be angled, in particular each have an undercut, which is engaged behind with a tool for contraction of the ring.
Die radial nach Innen weisenden Enden der Stege können gegen die Strömungsrichtung abgewinkelt sein. Bevorzugt sind sie parallel zur Längsachse des Kanals in Einlassrichtung abgewinkelt und greifen in das Federelement ein. Dadurch kann das Federelement radial in dem Kanal fixiert werden.The radially inwardly pointing ends of the webs may be angled against the flow direction. Preferably, they are angled parallel to the longitudinal axis of the channel in the inlet direction and engage in the spring element. As a result, the spring element can be fixed radially in the channel.
Wenn die Stege an ihrem zur Längsachse des Kolbens weisenden Ende, d.h. hier im dem Bereich in dem das Federelement aufliegt, verbreitert sind, bieten sie eine entsprechend vergrößerte Auflagefläche für das Federelement. Es wird entsprechend ruhiger in dem Kanal gehalten und Pendelbewegungen des Dichtelementes werden reduziert. Die Verbreiterungen können zu einem Ring geschlossen sein.When the webs at their end pointing to the longitudinal axis of the piston, i. Here in the area in which the spring element rests widened, they offer a correspondingly enlarged contact surface for the spring element. It is kept correspondingly quieter in the channel and oscillations of the sealing element are reduced. The broadening can be closed to a ring.
In einer Ausführungsform verspringen zumindest die einlassseitigen Oberflächen der Stege, bevorzugt die Stege als solche, von der Längsachse des Kanals ausgehend nach dem halben auslassseitigen Innendurchmesser des Federelementes in Richtung des Auslasses. Im Bereich des freien Innendurchmessers des Federelementes hat der Federteller folglich einen Vorsprung, der in das Federelement eingreift und dieses in seiner Position radial stabilisiert, ohne den Durchfluss zu behindern.In one embodiment, at least the inlet-side surfaces of the webs, preferably the webs as such, starting from the longitudinal axis of the channel after the half outlet-side inner diameter of the spring element in the direction of the outlet. In the area of the free inner diameter of the spring element has the spring plate thus, a projection which engages the spring element and radially stabilizes it in its position without obstructing the flow.
Bevorzugt entspricht die Länge des Vorsprungs der Länge des Federelements bei Nennöffnung des Ventils. Wenn das Dichtelement in das Federelement eingreift, ist die Länge des Vorsprungs entsprechend zu kürzen. Dann entspricht die Länge des Vorsprungs vorzugsweise der Länge des Federelementes bei Nennöffnung abzüglich der Tiefe des eingreifenden Teils des Dichtelementes. Der Vorsprung stützt das Federelement radial ohne den Durchfluss des zu pumpenden Fluids zu behindern. Eine Radialschwingung des Federelementes in der Strömung, die einer Pendelbewegung des Dichtelementes entspricht, wird verhindert. Zudem sitzt bei entsprechender Länge des Vorspungs das Dichtelement bei einer Öffnung des Ventils auf seine Nennweite auf dem Vorsprung auf, d.h. bei geöffnetem Ventil wird auch eine Axialschwingung des Dichtelementes durch den Vorsprung unterbunden. Dies erhöht den Wirkungsgrad der Schwingkolbenpumpe, weil der Strömung nicht durch die Anregung von axialen oder radialen Schwingungen des Dichtelements bzw. des Federelements Energie entzogen wird.Preferably, the length of the projection corresponds to the length of the spring element at nominal opening of the valve. When the sealing element engages in the spring element, the length of the projection is to be shortened accordingly. Then, the length of the projection preferably corresponds to the length of the spring element at nominal opening minus the depth of the engaging part of the sealing element. The projection supports the spring element radially without obstructing the flow of the fluid to be pumped. A radial vibration of the spring element in the flow, which corresponds to a pendulum movement of the sealing element, is prevented. In addition, sits at a corresponding length of the Vorspungs the sealing element at an opening of the valve to its nominal size on the projection on, i. when the valve is open and an axial vibration of the sealing element is prevented by the projection. This increases the efficiency of the oscillating piston pump, because the flow is not deprived of energy by the excitation of axial or radial vibrations of the sealing element or the spring element.
Wenn zumindest die einlassseitigen Oberflächen der Stege, bevorzugt die Stege selbst, von der Mitte ausgehend nach dem halben auslassseitigen Außendurchmesser des Federelementes in Richtung des Einlasses verspringen, dann bilden sie eine Wanne, die das Federelement haltert. Die Wände der Wanne stützen das Federelement radial.If at least the inlet-side surfaces of the webs, preferably the webs themselves, spring from the center to the half outlet-side outer diameter of the spring element in the direction of the inlet, then they form a trough which holds the spring element. The walls of the tub support the spring element radially.
Wenn die Wanne tief genug ausgeführt ist, dann stützen die einlassseitigen Oberflächen der verspringenden Stege auch das Dichtelement bei einer Öffnung des Ventils auf seine Nennweite radial. Vorzugsweise ist die Wanne einlassseitig trichterförmig erweitert. Dies verhindert ein Verkanten des Dichtelementes.When the trough is made deep enough, the inlet-side surfaces of the jounce-like webs also radially support the sealing element at an opening of the valve to its nominal width. Preferably, the trough is funnel-shaped on the inlet side. This prevents tilting of the sealing element.
Bevorzugt sind die Stege rotationssymmetrisch zur Längsachse des Kanals angeordnet. Dadurch fängt der Federteller das Federelement gleichmäßig ab, es verkippt nicht gegen die Längsachse des Kanals.Preferably, the webs are arranged rotationally symmetrical to the longitudinal axis of the channel. As a result, the spring plate catches the spring element evenly, it does not tilt against the longitudinal axis of the channel.
Der Federteller ist bevorzugt die Ringnut eingeklipst.The spring plate is preferably the annular groove clipped.
Bei einer Öffnung des Ventils auf seine Nennöffnung ist das Federelement vorzugsweise maximal gestaucht. Bei einer Schraubenfeder liegen dann die einzelnen Windungen aneinander an. Dadurch wird eine axiale und auch radiale Schwingung, z.B. eine Pendelbewegung des Dichtelementes in der Strömung verhindert.When opening the valve to its nominal opening, the spring element is preferably compressed to a maximum. In a helical spring then the individual turns are contiguous. Thereby an axial and also radial vibration, e.g. prevents a pendulum movement of the sealing element in the flow.
Anhand der Zeichnung wird die Erfindung näher beschrieben. Es zeigt:
- Fig. 1:
- Einen Kolben einer Schwingkolbenpumpe im Längsschnitt,
- Fig. 2:
- Einen vergrößerten Ausschnitt eines Längsschnittes durch einen Kolben einer Schwingkolbenpumpe,
- Fig. 3:
- Eine Ansicht der Ventilkonfiguration des Kolbens in
Fig. 2 , - Fig. 4:
- Eine Ansicht eines Federtelles,
- Fig. 5a:
- Eine Aufsicht auf einen weiteren Federteller,
- Fig. 5b:
- Einen Querschnitt des Federtellers in
Fig. 5a - Fig. 6a-6c:
- Eine Ansicht (
Fig. 6a ), eine Aufsicht (Fig. 6b ) und einen Querschnitt (Fig. 6c ) eines weiteren Federtellers, - Fig. 7:
- Zwei alternative ringnutseitige Verjüngungen eines Federtellers, und
- Fig. 8 - Fig. 14:
- weitere Federteller, in
Fig. 8 mit Feder.
- Fig. 1:
- A piston of a vibrating piston pump in longitudinal section,
- Fig. 2:
- An enlarged section of a longitudinal section through a piston of a vibrating piston pump,
- 3:
- A view of the valve configuration of the piston in
Fig. 2 . - 4:
- A view of a spring teller,
- Fig. 5a:
- A view of another spring plate,
- Fig. 5b:
- A cross section of the spring plate in
Fig. 5a - 6a-6c:
- A view (
Fig. 6a ), a supervision (Fig. 6b ) and a cross section (Fig. 6c ) another spring plate, - Fig. 7:
- Two alternative ringnutseitige tapers of a spring plate, and
- 8-14:
- more spring plates, in
Fig. 8 with feather.
Der Kolben 10 in
In
Der Federteller in
In
Die
Der Federteller 140 in
-
Figur 1FIG. 1 ::- 1010
- Kolbenpiston
- 1111
- Kanalchannel
- 1212
- Ventilraumvalve chamber
- 1313
- Ringnutring groove
- 1414
- einlassseitige Begrenzung der Ringnut 13inlet-side boundary of the annular groove 13th
- 1515
-
auslassseitige Begrenzung der Ringnut 13outlet-side boundary of the
annular groove 13 - 1616
- Längsachse des Kanals und des VentilsLongitudinal axis of the channel and the valve
- 1717
- Ventilsitzvalve seat
- 1818
- einlassseitige Stirnseite des Kolbens 10inlet side end face of the piston 10th
- 1919
- auslassseitige Stirnseite des Kolbens 10outlet side end face of the piston 10th
- 2020
- Dichtelement (Kugel)Sealing element (ball)
- 3030
- Feder als Beispiel für ein FederelementSpring as an example of a spring element
- 4040
- O-RingO-ring
- 5050
- Federtellerspring plate
-
Figur 2 und3 :
(nur inFig. 1 nicht gezeigte Teile)- 35
- zylindrische Schraubenfeder als Beispiel für ein Federelement
- 25
- Dichtelement (pilzförmig)
- 26
- Unterseite des Dichtelementes 25
- 27
- Stiel des Dichtelementes 25
- 28
- Kappe des Dichtelementes 25
FIG. 2 and3 :
(only inFig. 1 not shown parts)- 35
- cylindrical coil spring as an example of a spring element
- 25
- Sealing element (mushroom-shaped)
- 26
- Bottom of the sealing element 25th
- 27
- Stem of the sealing
element 25 - 28
- Cap of the sealing
element 25
-
Figur 4FIG. 4 ::- 5050
-
Federteller aus
Fig 1 bis 3 Spring plate offFig. 1 to 3 - 5151
- Ringsegmentering segments
- 5555
- StegeStege
- 5656
- Platte, auch VorsprungPlate, also projection
- 5757
-
einlassseitige Oberflächen der Stege 55inlet side surfaces of the
webs 55 - 5858
- verspringender Bereichleaping area
- 5959
-
äußere verjüngte Enden der Stege 55outer tapered ends of the
webs 55
-
Figur 5a und 5bFIGS. 5a and 5b ::- 6060
- Federtellerspring plate
- 6161
- Ringsegmentering segments
- 6565
- StegeStege
- 6666
- Platte, auch WannenbodenPlate, also pan bottom
- 6767
-
einlassseitige Oberflächen der Stege 55inlet side surfaces of the
webs 55 - 6868
- verspringender Bereichleaping area
-
Figuren 6a bis 6cFIGS. 6a to 6c ::- 7070
- Federelementspring element
- 7171
- Ringsegmentering segments
- 7575
- StegeStege
- 7676
- Platteplate
- 76a76a
-
Vertiefung der Platte 76Deepening of the
plate 76 - 76b76b
-
ringförmige Begrenzung der Vertiefung 76aannular boundary of the
recess 76a - 7979
-
äußere Enden der Stege 75outer ends of the
webs 75
-
Figur7Figur7 ::- 6969
- verjüngte Stegendenrejuvenated bridge ends
-
Figur 8FIG. 8 ::- 8080
- Federtellerspring plate
- 8181
- Ringsegmentering segments
- 8585
- StegeStege
- 8686
- abgewinkelte Stegendenangled bridge ends
- 8787
-
ringsegmentartige Verbreiterung der Stege 85Ring segment-like widening of the
webs 85
-
Figuren 9 bis 11FIGS. 9 to 11 ::- 90, 100, 110:90, 100, 110:
- Federtellerspring plate
- 91, 101, 111:91, 101, 111:
- Ringsegmentering segments
- 92, 102, 112:92, 102, 112:
-
Öffnungen (
Fig. 9 und 10 ) bzw. Hinterschneidungen (Fig. 11 )Openings (FIGS. 9 and 10 ) or undercuts (Fig. 11 ) - 95, 105, 115:95, 105, 115:
- StegeStege
-
Figuren 12 bis 14FIGS. 12 to 14 ::- 120, 140:120, 140:
- Federtellerspring plate
- 125,145:125.145:
- StegeStege
Claims (15)
dadurch gekennzeichnet, daß
der Kanal (11) zwischen dem Ventilsitz (17) und der auslassseitigen Stirnseite (19) des Kolbens (10) eine Ringnut (13) hat, deren auslassseitige Begrenzung (15) ein Widerlager für das Federelement (30, 35) ist.Piston (10) of an oscillating piston pump, with a channel connecting the end faces (11) and a check valve which has a by a spring element (30, 35) against a valve seat (17) loaded sealing element (20, 25), wherein the valve seat (17 ) of the check valve is an extension of the channel (11),
characterized in that
the channel (11) between the valve seat (17) and the outlet-side end face (19) of the piston (10) has an annular groove (13) whose outlet-side boundary (15) is an abutment for the spring element (30, 35).
dadurch gekennzeichnet, daß
sich das Federelement (30, 35) über einen Federteller (50, 60, 70, 80, 90, 100, 110, 120, 140) an der auslassseitigen Begrenzung (15) der Ringnut (13) abstützt.Piston according to claim 1
characterized in that
the spring element (30, 35) via a spring plate (50, 60, 70, 80, 90, 100, 110, 120, 140) on the outlet-side boundary (15) of the annular groove (13) is supported.
dadurch gekennzeichnet, daß
zwischen dem Federteller (50, 60, 70, 80, 90, 100, 110, 120, 140)und der einlassseitigen Begrenzung (14) der Ringnut (13) ein elastischer O-Ring (40) ist.Piston according to claim 2
characterized in that
between the spring plate (50, 60, 70, 80, 90, 100, 110, 120, 140) and the inlet-side boundary (14) of the annular groove (13) is an elastic O-ring (40).
dadurch gekennzeichnet, daß
der Federteller (50, 60, 70, 120, 140) mindestens drei von der Längsachse des Kanals (11) sternförmig ausgehende Stege (55, 65, 120, 140) hat, die in die Ringnut (13) eingreifen.Piston according to one of claims 2 or 3,
characterized in that
the spring plate (50, 60, 70, 120, 140) at least three of the longitudinal axis of the channel (11) star-shaped outgoing webs (55, 65, 120, 140) which engage in the annular groove (13).
dadurch gekennzeichnet, daß
benachbarte Stege (55, 65, 75) durch Ringsegmente (51, 61, 71) miteinander verbunden sind, wobei zwischen den Ringsegmenten (51, 61, 71) und der Mitte des Federtellers (50, 60, 70) je ein Durchlass für das zu pumpende Fluid ist.Piston according to the preceding claim,
characterized in that
adjacent webs (55, 65, 75) by ring segments (51, 61, 71) are interconnected, wherein between the ring segments (51, 61, 71) and the center of the spring plate (50, 60, 70) each have a passage for the is to be pumped fluid.
dadurch gekennzeichnet, daß
der Federteller (80, 90, 100, 110) ein in die Ringnut (13) eingesetztes Ringsegment (81, 91, 101, 111) hat, an dem mindestens 3 Stege (85, 95, 105, 115) sind, die radial nach innen weisen und die das Federelement (30, 35) haltern.Piston according to one of claims 2 to 5,
characterized in that
the spring plate (80, 90, 100, 110) has a ring segment (81, 91, 101, 111) inserted into the annular groove (13), on which there are at least 3 webs (85, 95, 105, 115) which follow radially inside and which support the spring element (30, 35).
dadurch gekennzeichnet, daß
die einlassseitigen Oberflächen (57) der Stege (55), von der Längsachse (16) des Kanals (11) ausgehend, nach dem halben auslassseitigen Innendurchmesser des Federelementes (30, 35) in Richtung der auslassseitigen Stirnfläche (19) des Kolbens (10) verspringen.Piston according to one of claims 4 to 6,
characterized in that
the inlet-side surfaces (57) of the webs (55), starting from the longitudinal axis (16) of the channel (11), after the half outlet-side inner diameter of the spring element (30, 35) in the direction of the outlet-side end face (19) of the piston (10) verspringen.
die einlassseitigen Oberflächen (67) der Stege (65) von der Mitte ausgehend nach dem halben auslassseitigen Außendurchmesser des Federelementes (30,35) in Richtung der einlassseitigen Stirnfläche (18) des Kolbens (10) verspringen.Piston according to one of claims 4 to 6, characterized in that
the inlet-side surfaces (67) of the webs (65) jump from the center to the half outlet-side outer diameter of the spring element (30,35) in the direction of the inlet-side end face (18) of the piston (10).
dadurch gekennzeichnet, daß
bei einer Öffnung des Ventils auf seine Nennweite das Dichtelement (25) auf dem Federteller (50, 70, 80) aufliegt.Piston according to one of claims 2 to 8,
characterized in that
at an opening of the valve to its nominal diameter, the sealing element (25) on the spring plate (50, 70, 80) rests.
dadurch gekennzeichnet, daß.
der Kanal (11) zwischen dem Ventilsitz (17) und der auslassseitigen Stirnseite (19) des Ventils (10) eine Ringnut (13) hat, deren auslassseitige Begrenzung (15) ein Widerlager für das Federelement (30, 35) ist.Oscillating piston pump having a channel (11) connecting the pump inlet and the pump outlet, in which there is at least one check valve which has a sealing element (20, 25) loaded by a spring element (30, 35) against a valve seat (17), the valve seat ( 17) of the check valve is an extension of the channel (11),
characterized in that .
the channel (11) between the valve seat (17) and the outlet-side end face (19) of the valve (10) has an annular groove (13) whose outlet-side boundary (15) is an abutment for the spring element (30, 35).
dadurch gekennzeichnet, daß
sich das Federelement (30, 35) über einen Federteller (50, 60, 80, 90, 100, 110, 120, 140) an der auslassseitigen Begrenzung (15) der Ringnut (13) abstützt.Oscillating piston pump according to claim 11
characterized in that
the spring element (30, 35) via a spring plate (50, 60, 80, 90, 100, 110, 120, 140) on the outlet-side boundary (15) of the annular groove (13) is supported.
dadurch gekennzeichnet, daß
zwischen dem Federteller (50, 60, 80, 90, 100, 110, 120, 140)und der einlassseitigen Begrenzung (14) der Ringnut (13) ein elastischer O-Ring (40) ist.Oscillating piston pump according to claim 12
characterized in that
between the spring plate (50, 60, 80, 90, 100, 110, 120, 140) and the inlet-side boundary (14) of the annular groove (13) is an elastic O-ring (40).
dadurch gekennzeichnet, daß
sich der Federteller (50, 60, 70, 80, 90, 100, 110, 120, 140) an der auslassseitigen Begrenzung (15) der Ringnut (13) über einen ein elastischen O-Ring abstützt.Oscillating piston pump according to claim 11 or 12,
characterized in that
the spring plate (50, 60, 70, 80, 90, 100, 110, 120, 140) on the outlet-side boundary (15) of the annular groove (13) via an elastic O-ring is supported.
dadurch gekennzeichnet, daß
der Federteller (50, 60, 70, 120, 140) in dem Bereich, in dem er in die Ringnut (13) eingreift, verjüngt ist.Oscillating piston pump according to one of claims 12 to 14,
characterized in that
the spring plate (50, 60, 70, 120, 140) in the region in which it engages in the annular groove (13) is tapered.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202007005941 | 2007-04-25 | ||
DE102008000780 | 2008-03-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1985855A1 true EP1985855A1 (en) | 2008-10-29 |
Family
ID=39591550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08155014A Withdrawn EP1985855A1 (en) | 2007-04-25 | 2008-04-23 | Piston of an oscillating piston pump |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1985855A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102052298A (en) * | 2009-11-04 | 2011-05-11 | 罗伯特·博世有限公司 | Valve with spherical sealing component |
CN102072146A (en) * | 2009-11-23 | 2011-05-25 | 罗伯特·博世有限公司 | Valve with valve closure body |
TWI453353B (en) * | 2010-05-11 | 2014-09-21 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874000A (en) * | 1957-03-13 | 1959-02-17 | Bosch Arma Corp | Fuel injection nozzles |
DE1653516A1 (en) * | 1967-01-24 | 1971-08-26 | Licentia Gmbh | Oscillating piston pump |
WO1995003198A1 (en) * | 1993-07-23 | 1995-02-02 | Itt Automotive Europe Gmbh | Hydraulic braking system with skid and drive slip control |
DE4425402A1 (en) * | 1993-08-06 | 1996-04-04 | Teves Gmbh Alfred | Hydraulic pump for hydraulic brake system |
DE19542914A1 (en) * | 1994-12-23 | 1996-06-27 | Keller Kg Wilhelm | Electromagnetic vibrating piston pump and mfg. process |
WO2003027454A1 (en) * | 2001-09-25 | 2003-04-03 | Argillon Gmbh | Reducing agent pump for an exhaust gas post-treatment unit on an internal combustion engine |
-
2008
- 2008-04-23 EP EP08155014A patent/EP1985855A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874000A (en) * | 1957-03-13 | 1959-02-17 | Bosch Arma Corp | Fuel injection nozzles |
DE1653516A1 (en) * | 1967-01-24 | 1971-08-26 | Licentia Gmbh | Oscillating piston pump |
WO1995003198A1 (en) * | 1993-07-23 | 1995-02-02 | Itt Automotive Europe Gmbh | Hydraulic braking system with skid and drive slip control |
DE4425402A1 (en) * | 1993-08-06 | 1996-04-04 | Teves Gmbh Alfred | Hydraulic pump for hydraulic brake system |
DE19542914A1 (en) * | 1994-12-23 | 1996-06-27 | Keller Kg Wilhelm | Electromagnetic vibrating piston pump and mfg. process |
WO2003027454A1 (en) * | 2001-09-25 | 2003-04-03 | Argillon Gmbh | Reducing agent pump for an exhaust gas post-treatment unit on an internal combustion engine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102052298A (en) * | 2009-11-04 | 2011-05-11 | 罗伯特·博世有限公司 | Valve with spherical sealing component |
CN102072146A (en) * | 2009-11-23 | 2011-05-25 | 罗伯特·博世有限公司 | Valve with valve closure body |
CN102072146B (en) * | 2009-11-23 | 2013-10-30 | 罗伯特·博世有限公司 | Valve with valve closure body |
TWI453353B (en) * | 2010-05-11 | 2014-09-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AT412302B (en) | AUTOMATIC VALVE | |
EP1614945B1 (en) | Check valve | |
EP1774177B1 (en) | Piston pump with improved efficiency | |
EP2167820B1 (en) | Diaphragm pump | |
DE102008055609B4 (en) | reciprocating pump | |
DE102007005736A1 (en) | Displacement pump for delivering a fluid with automatic adjustment to the compressibility of this fluid | |
EP3215771A1 (en) | Proportional valve, air-conditioner compressor arrangement, and operating method | |
EP1835178B1 (en) | Sealing assembly for a piston type vacuum pump | |
EP3362713B1 (en) | Poppet valve | |
DE3043790A1 (en) | DISC VALVE | |
EP1774176A1 (en) | Piston pump with improved pressure build-up dynamics | |
EP1985855A1 (en) | Piston of an oscillating piston pump | |
DE102010040169A1 (en) | Device for throttling a fluid flow and corresponding piston pump for conveying fluids | |
DE102011002982B4 (en) | Spring element and corresponding piston pump for pumping fluids | |
EP2143935A1 (en) | Pump unit for fluid delivery | |
DE10125420C1 (en) | Multi-stage reciprocating compressor with interconnected high- and low pressure cylinders, employs plastic disc closure in non return valve | |
DE60315785T2 (en) | pump | |
EP0346285B1 (en) | Valve arrangement | |
EP1899610B1 (en) | Hydraulic accumulator | |
DE112020000261T5 (en) | Metal damper with metal membrane and fuel pump provided with it | |
WO2017076647A1 (en) | Coolant pump for an internal combustion engine | |
DE202007005224U1 (en) | Valve used as a magnetic valve comprises a bearing bush arranged on an anchor for sliding the anchor | |
EP3686465A1 (en) | Quick switch valve | |
DE102004011050B4 (en) | pump | |
DE19921951A1 (en) | Motor vehicle pump under piezo-control |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
17P | Request for examination filed |
Effective date: 20090429 |
|
17Q | First examination report despatched |
Effective date: 20090608 |
|
AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20091219 |