EP1813809B1 - Pulsation damper - Google Patents

Pulsation damper Download PDF

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Publication number
EP1813809B1
EP1813809B1 EP06022896A EP06022896A EP1813809B1 EP 1813809 B1 EP1813809 B1 EP 1813809B1 EP 06022896 A EP06022896 A EP 06022896A EP 06022896 A EP06022896 A EP 06022896A EP 1813809 B1 EP1813809 B1 EP 1813809B1
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EP
European Patent Office
Prior art keywords
membrane
pulsation damper
rod
pressure chamber
section
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EP06022896A
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German (de)
French (fr)
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EP1813809A1 (en
Inventor
Friedrich Dipl.-Ing. Wiechmann
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Abel GmbH and Co KG
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Abel GmbH and Co KG
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Priority to PL06022896T priority Critical patent/PL1813809T3/en
Publication of EP1813809A1 publication Critical patent/EP1813809A1/en
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    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
    • F04B11/0016—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a fluid spring

Definitions

  • the invention relates to a pulsation damper for pulse-conveying conveying pumps according to claim 1.
  • Pulping conveying pumps are, for example, piston pumps or piston diaphragm pumps.
  • pulsation dampers are used. They usually consist of an airtight container closed at one end by a membrane. The membrane is facing on the side facing away from the container of the feed line and closes on the opposite side of a pressure chamber, which is connected via a valve with a pressure source.
  • pulsation dampers with a predetermined pressure in the pressure chamber. More usual are pulsation dampers, in which the pressure in the pressure chamber can not be changed.
  • the pressure in the pressure chamber is set to about 0.6 MPa operating pressure, so that higher pressure loads are suppressed in the promotion by compression of the gas in the pressure chamber and lower pressure amplitudes (flow rates) are compensated by the pulsation damper.
  • a pulsation damper in which on the membrane, a rod is fixed, which is led out of the pressure chamber and the outside has a permanent magnet which actuates a filling and a discharge valve via two magnetic switches.
  • the invention has for its object to provide a pulsation damper for pulse-conveying promotional pumps, which has a simple structure with regard to the control of the position of the membrane.
  • an axially extending in the pressure chamber rod is connected to the membrane, which holds at least one permanent magnet.
  • the permanent magnet position measuring device which generates an actual value for the position of the membrane. The actual value is compared in the control device with a setpoint, for the purpose of actuating the switching valve or a vent valve in accordance with the control deviation.
  • the position measuring device on a position sensor, which is arranged protected within the container, so that only the to be controlled by the control device valves, such as solenoid valves are to be mounted on the outside of the container.
  • the rod is guided in a sleeve which is attached to the ceiling of the container.
  • the rod can have an axial bore from the free end, into which a sensor rod of the position measuring device dips.
  • the permanent magnet is preferably annular and thus surrounds the rod-shaped sensor. Depending on the relative position of rod or permanent magnet and sensor rod, the position of the membrane is read and entered as an actual value in the control device.
  • a first bottom section with a conical bearing surface is arranged in the pressure chamber on the side facing the diaphragm.
  • a second bottom portion is arranged with a conical contact surface, which is directed towards the membrane.
  • the membrane In the end position, the membrane can now invest in the upper or lower contact surface and can not be stretched beyond this position, which serves to protect the membrane at excessive load peaks.
  • the second bottom portion may be flanged to the first, wherein between the bottom portions of the outer edge of the membrane is clamped.
  • a conical metal disk for example made of aluminum, may be molded into the membrane.
  • the metal disc has, according to a further embodiment, a threaded bore in which a threaded portion of the rod can be screwed.
  • a threaded portion of the rod in which a threaded portion of the rod can be screwed.
  • the diaphragm thus formed, only the diaphragm portion deforms between the metal disc and the clamped peripheral portion.
  • This is conically shaped according to a further embodiment, wherein an adjoining portion near the clamped area in the section is approximately arcuate and at least partially against the second conical surface of the lower bottom portion applies.
  • the membrane is shaped so that causes a substantially complete planar contact of the membrane on the contact surfaces in the end positions.
  • a pulsation damper 10 having a container 12 composed of individual sections 14-22.
  • the annular portions 16 to 22 are welded together, and the Section 14 forms a hood-like ceiling.
  • a T-shaped conduit piece 24 is connected with its vertical web to the ceiling 14 and connects to the interior of the container 12, in which a pressure chamber 94 is formed.
  • the crosspiece is connected at one end to a first solenoid valve 26 whose output is connected via a muffler 28 to the atmosphere.
  • the other end of the crosspiece of the T-piece 24 is connected via a flow control valve 30 to a second solenoid valve 32.
  • the input 34 of the solenoid valve is connectable to a gas pressure source, not shown. If the valve 32 is opened, gas flows under pressure into the pressure chamber 94. If, however, the valve 26 is opened, gas flows from the pressure chamber 94 into the open.
  • a pressure gauge 36 is also connected, which is arranged on the ceiling 14.
  • the container portion 22 has a flange 38, against which a lower bottom portion 40 is flanged by means of screws 42.
  • the lower bottom portion 40 has a central circular opening 44 and a conical bearing surface 46, which is in the region of the opening 44 to a planar contact surface 48 which is perpendicular to the axis of the container 12.
  • the portion 22 of the container 20 has a conical bottom portion 50, with a conical bearing surface 52.
  • the upper bottom portion 50 is provided with a circular opening 54.
  • a flexible membrane 56 for example made of reinforced rubber or the like, arranged.
  • the Membrane 56 centrally embeds a conical metal disk 58, for example of aluminum. Outside the metal disk 58, the diaphragm 56 has a conical section 60, which is followed by a sectional-arc-shaped section 62, which is bent downwards in the direction of lower abutment surface 46, wherein it bears partially against the abutment surface 46 in the radially outer region.
  • a bead 66 on the periphery of the circular diaphragm 56 is clamped between the bottom portion 40 and the flange 38.
  • the described geometric shape of the diaphragm 56 applies to the central position shown.
  • In the pressure chamber 94 is a predetermined pressure, which is generated by the gas introduced. This pressure is usually chosen so high that it corresponds to the average operating pressure of the delivery line of a pump, not shown.
  • the delivery line is connected to the opening 44. Pressure peaks cause the diaphragm 56 to continue to move upwards. Pressure drops cause movement in the opposite direction. If it comes to a particularly high pressure peak, the membrane 56 lays against the contact surface 52 and is thereby prevented from further loading. The same applies to an excessive discharge in the delivery line, whereby the diaphragm 56 abuts against the lower contact surfaces 46, 48.
  • a sensor 70 detects when liquid enters the pressure chamber 94, indicating that the diaphragm 56 has been damaged or destroyed.
  • the metal disk 58 is exposed at the top and has in a relatively small axial collar 72 a threaded bore into which a threaded pin 74 is axially screwed to an extended rod 76.
  • the rod 76 is connected to the diaphragm 56.
  • the rod 76 has an axial bore 78 from the upper free end. It is also connected at the upper end to an annular permanent magnet 80.
  • a rod-shaped position sensor 82 Into the bore 78 extends a rod-shaped position sensor 82 which is connected to a position measuring device 84. Depending on the relative position of rod sensor 82 and permanent magnet 80, a corresponding position signal is generated, which is compared in a control device, not shown, with a desired value range for the position of the diaphragm 56.
  • either the pressure in the pressure chamber 94 is increased or decreased.
  • the valves 32 and 26 are controlled by the control device, wherein the flow control valve 30 ensures the amount of gas per time from the pressure source (not shown) flows into the pressure chamber 94.
  • a block 86 is inserted centrally and welded in it, for example. By means of screws, a further block 88 is screwed to the block 86. Between the blocks 86, 88 a sleeve 90 is held, which serves as a guide for the rod 76. In addition, the upper block 88 serves to support the position measuring device 84, which is connected via a cable 92 with the control device, not shown in connection.
  • the position or attitude measuring device for the membrane 56 is housed within the container 12 and therefore protected against external influences.
  • the membrane 56 is protected against overloads, therefore can not tear at peak loads or the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipe Accessories (AREA)
  • Reciprocating Pumps (AREA)
  • Valve Device For Special Equipments (AREA)
  • Surgical Instruments (AREA)
  • Dram (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The pulsation damper (10) for a feed pump has a housing with a flexible membrane closing one end and defining a pressure chamber (24) of variable volume The chamber is connected to a gas source by a switching valve. The membrane has a position adjuster to allow movement between end positions dependent on the fluid pressure. The membrane is connected to a rod which carries a permanent magnet and there is a sensor to determine the membrane position and alter the switching valve or vent valve to regulate the membrane.

Description

Die Erfindung bezieht sich auf einen Pulsationsdämpfer für pulsweise fördernde Förderpumpen nach dem Patentanspruch 1.The invention relates to a pulsation damper for pulse-conveying conveying pumps according to claim 1.

Pulsweise fördernde Förderpumpen sind zum Beispiel Kolbenpumpen oder Kolbenmembranpumpen. Um die Auswirkungen der stoßweisen Förderung des Fluids zu mildem, werden sogenannte Pulsationsdämpfer eingesetzt. Sie bestehen üblicherweise aus einem luftdicht abgeschlossenen Behälter, der an einem Ende von einer Membran abgeschlossen ist. Die Membran ist auf der dem Behälter abgewandten Seite der Förderleitung zugekehrt und schließt auf der gegenüberliegenden Seite eine Druckkammer ab, die über ein Ventil mit einer Druckquelle verbindbar ist. Es existieren auch Pulsationsdämpfer mit einem vorgegebenen Druck in der Druckkammer. Üblicher sind Pulsationsdämpfer, in denen der Druck in der Druckkammer nicht geändert werden kann. Der Druck in der Druckkammer wird etwa auf 0,6 MPa Betriebsdruck eingestellt, sodass höhere Druckbelastungen bei der Förderung durch Kompression des Gases in der Druckkammer gedämpft und niedrigere Druckamplituden (Fördermengen) durch den Pulsationsdämpfer ausgeglichen werden.Pulping conveying pumps are, for example, piston pumps or piston diaphragm pumps. To mitigate the effects of intermittent fluid delivery, so-called pulsation dampers are used. They usually consist of an airtight container closed at one end by a membrane. The membrane is facing on the side facing away from the container of the feed line and closes on the opposite side of a pressure chamber, which is connected via a valve with a pressure source. There are also pulsation dampers with a predetermined pressure in the pressure chamber. More usual are pulsation dampers, in which the pressure in the pressure chamber can not be changed. The pressure in the pressure chamber is set to about 0.6 MPa operating pressure, so that higher pressure loads are suppressed in the promotion by compression of the gas in the pressure chamber and lower pressure amplitudes (flow rates) are compensated by the pulsation damper.

Es ist auch bekannt geworden, beispielsweise aus der Offenlegungsschrift DT 25 05 856 A1 die Lage der Membran zu überwachen und eine Regelung dahingehend vorzunehmen, dass die Membran, die eine untere und eine obere Endlage einnehmen kann, sich während des Betriebes zwischen den Endlagen innerhalb eines relativ begrenzten Bereiches bewegt. Weicht die Lage der Membran von einem Sollwertbereich ab, wird der Druckkammer Gas unter Druck zugeführt. Im umgekehrten Fall wird Gas aus der Druckkammer entlassen.It has also become known, for example from the published patent application DT 25 05 856 A1 to monitor the position of the membrane and to control that the membrane, which can take a lower and an upper end position, moves during operation between the end positions within a relatively limited range. If the position of the diaphragm deviates from a desired value range, the pressure chamber will sink gas Pressure supplied. In the reverse case, gas is released from the pressure chamber.

Aus DE 40 31 239 , die als nächstliegender Stand der Technik angesehen wird, A1 ist ein Pulsationsdämpfer bekannt, bei dem an der Membran eine Stange befestigt ist, die aus der Druckkammer herausgeführt ist und außen einen Permanentmagneten aufweist, der über zwei Magnetschalter ein Füll- und ein Ablassventil betätigt.Out DE 40 31 239 A1, a pulsation damper is known, in which on the membrane, a rod is fixed, which is led out of the pressure chamber and the outside has a permanent magnet which actuates a filling and a discharge valve via two magnetic switches.

Der Erfindung liegt die Aufgabe zugrunde, einen Pulsationsdämpfer für pulsweise fördernde Förderpumpen zu schaffen, der im Hinblick auf die Regelung der Lage der Membran einen einfachen Aufbau aufweist.The invention has for its object to provide a pulsation damper for pulse-conveying promotional pumps, which has a simple structure with regard to the control of the position of the membrane.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Bei dem Pulsationsdämpfer nach Patentanspruch 1 ist mit der Membran eine sich axial in der Druckkammer erstreckende Stange verbunden, die mindestens einen Permanentmagneten hält. Es ist eine mit dem Permanentmagneten zusammenwirkende Positionsmeßvorrichtung vorhanden, die einen Istwert für die Lage der Membran erzeugt. Der Istwert wird in der Regelvorrichtung mit einem Sollwert verglichen, zwecks Betätigung des Schaltventils oder eines Entlüftungsventils nach Maßgabe der Regelabweichung.In the pulsation damper according to claim 1, an axially extending in the pressure chamber rod is connected to the membrane, which holds at least one permanent magnet. There is a cooperating with the permanent magnet position measuring device which generates an actual value for the position of the membrane. The actual value is compared in the control device with a setpoint, for the purpose of actuating the switching valve or a vent valve in accordance with the control deviation.

Bei der Erfindung weist die Positionsmeßvorrichtung einen Positionssensor auf, der geschützt innerhalb des Behälters angeordnet ist, sodass lediglich die von der Regelvorrichtung anzusteuernden Ventile, beispielsweise Magnetventile, auf der Außenseite des Behälters anzubringen sind.In the invention, the position measuring device on a position sensor, which is arranged protected within the container, so that only the to be controlled by the control device valves, such as solenoid valves are to be mounted on the outside of the container.

Nach einer Ausgestaltung der Erfindung ist die Stange in eine Hülse geführt, die an der Decke des Behälters angebracht ist. Nach einer weiteren Ausgestaltung der Erfindung kann die Stange vom freien Ende her eine axiale Bohrung aufweisen, in die ein Sensorstab der Positionsmeßvorrichtung eintaucht. Der Permanentmagnet ist vorzugsweise ringförmig und umgibt mithin den stabförmigen Sensor. In Abhängigkeit von der Relativposition von Stange bzw. Permanentmagnet und Sensorstab wird die Lage der Membran abgelesen und als Istwert in die Regelvorrichtung eingegeben.According to one embodiment of the invention, the rod is guided in a sleeve which is attached to the ceiling of the container. According to a further embodiment of the invention, the rod can have an axial bore from the free end, into which a sensor rod of the position measuring device dips. The permanent magnet is preferably annular and thus surrounds the rod-shaped sensor. Depending on the relative position of rod or permanent magnet and sensor rod, the position of the membrane is read and entered as an actual value in the control device.

Bei einem anderen Pulsationsdämpfer ist in der Druckkammer auf der der Membran zugewandten Seite ein erster Bodenabschnitt mit einer konischen Anlagefläche angeordnet. Auf der entgegengesetzten Seite der Membran ist ein zweiter Bodenabschnitt angeordnet mit einer konischen Anlagefläche, die zur Membran hin gerichtet ist. In der Endlage kann sich die Membran nun an die obere oder untere Anlagefläche anlegen und kann über diese Position hinaus nicht gedehnt werden, was zum Schutz der Membran bei übermäßigen Belastungsspitzen dient.In another pulsation damper, a first bottom section with a conical bearing surface is arranged in the pressure chamber on the side facing the diaphragm. On the opposite side of the membrane, a second bottom portion is arranged with a conical contact surface, which is directed towards the membrane. In the end position, the membrane can now invest in the upper or lower contact surface and can not be stretched beyond this position, which serves to protect the membrane at excessive load peaks.

Nach einer Ausgestaltung kann der zweite Bodenabschnitt an den ersten angeflanscht sein, wobei zwischen den Bodenabschnitten der äußere Rand der Membran eingespannt ist.According to one embodiment, the second bottom portion may be flanged to the first, wherein between the bottom portions of the outer edge of the membrane is clamped.

Nach einer weiteren Ausgestaltung kann in die Membran eine konische Metallscheibe, beispielsweise aus Aluminium, eingeformt sein. Die Metallscheibe weist nach einer weiteren Ausgestaltung eine Gewindebohrung auf, in welcher ein Gewindeabschnitt der Stange eingeschraubt werden kann. Bei der so ausgebildeten Membran verformt sich lediglich der Membranabschnitt zwischen der Metallscheibe und dem eingespannten Umfangsbereich. Dieser ist nach einer weiteren Ausgestaltung konisch geformt, wobei ein sich daran anschließender Abschnitt nahe dem eingespannten Bereich im Schnitt annähernd bogenförmig ist und sich zumindest teilweise gegen die zweite konische Fläche des unteren Bodenabschnitts anlegt. In jedem Fall ist die Membran so geformt, dass in den Endlagen eine im Wesentlichen vollständige flächige Anlage der Membran an den Anlageflächen bewirkt.According to a further embodiment, a conical metal disk, for example made of aluminum, may be molded into the membrane. The metal disc has, according to a further embodiment, a threaded bore in which a threaded portion of the rod can be screwed. In the diaphragm thus formed, only the diaphragm portion deforms between the metal disc and the clamped peripheral portion. This is conically shaped according to a further embodiment, wherein an adjoining portion near the clamped area in the section is approximately arcuate and at least partially against the second conical surface of the lower bottom portion applies. In any case, the membrane is shaped so that causes a substantially complete planar contact of the membrane on the contact surfaces in the end positions.

Die Erfindung wird nachfolgend anhand eines in Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.

Fig. 1
zeigt perspektivisch einen Pulsationsdämpfer nach der Erfindung.
Fig. 2
zeigt einen Schnitt durch den Pulsationsdämpfer nach Fig. 1 entlang der Linie 2-2.
The invention will be explained in more detail with reference to an embodiment shown in the drawings.
Fig. 1
shows in perspective a pulsation damper according to the invention.
Fig. 2
shows a section through the pulsation damper Fig. 1 along the line 2-2.

In den Figuren 1 und 2 ist ein Pulsationsdämpfer 10 gezeigt, mit einem Behälter 12, der aus einzelnen Abschnitten 14 bis 22 zusammengesetzt ist. Die ringartigen Abschnitte 16 bis 22 sind miteinander verschweißt, und der Abschnitt 14 bildet eine haubenartige Decke. Ein T-förmiges Leitungsstück 24 ist mit seinem vertikalen Steg mit der Decke 14 verbunden und stellt eine Verbindung zum Inneren des Behälters 12 her, in welchem eine Druckkammer 94 geformt ist. Das Querstück ist an einem Ende mit einem ersten Magnetventil 26 verbunden, dessen Ausgang über einen Schalldämpfer 28 mit der Atmosphäre verbunden ist. Das andere Ende des Querstegs des T-Stücks 24 ist über ein Mengenregelventil 30 mit einem zweiten Magnetventil 32 verbunden. Der Eingang 34 des Magnetventils ist mit einer nicht gezeigten Gasdruckquelle verbindbar. Wird das Ventil 32 geöffnet, strömt Gas unter Druck in die Druckkammer 94. Wird hingegen das Ventil 26 geöffnet, strömt Gas aus der Druckkammer 94 ins Freie.In the Figures 1 and 2 For example, a pulsation damper 10 is shown having a container 12 composed of individual sections 14-22. The annular portions 16 to 22 are welded together, and the Section 14 forms a hood-like ceiling. A T-shaped conduit piece 24 is connected with its vertical web to the ceiling 14 and connects to the interior of the container 12, in which a pressure chamber 94 is formed. The crosspiece is connected at one end to a first solenoid valve 26 whose output is connected via a muffler 28 to the atmosphere. The other end of the crosspiece of the T-piece 24 is connected via a flow control valve 30 to a second solenoid valve 32. The input 34 of the solenoid valve is connectable to a gas pressure source, not shown. If the valve 32 is opened, gas flows under pressure into the pressure chamber 94. If, however, the valve 26 is opened, gas flows from the pressure chamber 94 into the open.

Mit der Druckkammer 94 ist außerdem ein Druckmesser 36 verbunden, der auf der Decke 14 angeordnet ist.With the pressure chamber 94, a pressure gauge 36 is also connected, which is arranged on the ceiling 14.

Der Behälterabschnitt 22 weist einen Flansch 38 auf, gegen den ein unterer Bodenabschnitt 40 mittels Schrauben 42 angeflanscht ist. Der untere Bodenabschnitt 40 weist eine mittige kreisförmige Öffnung 44 auf und eine konische Anlagefläche 46, die im Bereich der Öffnung 44 zu einer planen Anlagefläche 48 wird, die senkrecht auf der Achse des Behälters 12 steht.The container portion 22 has a flange 38, against which a lower bottom portion 40 is flanged by means of screws 42. The lower bottom portion 40 has a central circular opening 44 and a conical bearing surface 46, which is in the region of the opening 44 to a planar contact surface 48 which is perpendicular to the axis of the container 12.

Der Abschnitt 22 des Behälters 20 weist einen konischen Bodenabschnitt 50 auf, mit einer konischen Anlagefläche 52. Mittig ist der obere Bodenabschnitt 50 mit einer Kreisöffnung 54 versehen. Innerhalb des doppelkonischen Bereichs zwischen den Anlageflächen 52, 46 ist eine flexible Membran 56, beispielsweise aus verstärktem Gummi oder dergleichen, angeordnet. Die Membran 56 bettet mittig eine konische Metallscheibe 58, zum Beispiel aus Aluminium, ein. Außerhalb der Metallscheibe 58 weist die Membran 56 einen konischen Abschnitt 60 auf, an den sich ein schnittbogenförmiger Abschnitt 62 anschließt, der in Richtung unterer Anlagefläche 46 nach unten durchgebogen ist, wobei er im radial äußeren Bereich teilweise an der Anlagefläche 46 anliegt. Ein Wulst 66 am Umfang der kreisförmigen Membran 56 ist zwischen dem Bodenabschnitt 40 und dem Flansch 38 eingespannt. Die beschriebene geometrische Gestalt der Membran 56 gilt für die gezeigte Mittellage. In der Druckkammer 94 befindet sich ein vorgegebener Druck, der durch eingeleitetes Gas erzeugt wird. Dieser Druck wird üblicherweise so hoch gewählt, dass er dem mittleren Betriebsdruck der Förderleitung einer nicht gezeigten Pumpe entspricht. Die Förderleitung ist mit der Öffnung 44 verbunden. Druckspitzen führen dazu, dass die Membran 56 weiter nach oben bewegt wird. Druckabfälle führen zu einer Bewegung in die entgegengesetzte Richtung. Kommt es zu einer besonders hohen Druckspitze, legt sich die Membran 56 satt an die Anlagefläche 52 an und wird dadurch an einer weiteren Belastung gehindert. Das Gleiche gilt für eine zu starke Entlastung in der Förderleitung, wodurch sich die Membran 56 an die unteren Anlageflächen 46, 48 anlegt.The portion 22 of the container 20 has a conical bottom portion 50, with a conical bearing surface 52. In the center, the upper bottom portion 50 is provided with a circular opening 54. Within the biconical region between the abutment surfaces 52, 46 is a flexible membrane 56, for example made of reinforced rubber or the like, arranged. The Membrane 56 centrally embeds a conical metal disk 58, for example of aluminum. Outside the metal disk 58, the diaphragm 56 has a conical section 60, which is followed by a sectional-arc-shaped section 62, which is bent downwards in the direction of lower abutment surface 46, wherein it bears partially against the abutment surface 46 in the radially outer region. A bead 66 on the periphery of the circular diaphragm 56 is clamped between the bottom portion 40 and the flange 38. The described geometric shape of the diaphragm 56 applies to the central position shown. In the pressure chamber 94 is a predetermined pressure, which is generated by the gas introduced. This pressure is usually chosen so high that it corresponds to the average operating pressure of the delivery line of a pump, not shown. The delivery line is connected to the opening 44. Pressure peaks cause the diaphragm 56 to continue to move upwards. Pressure drops cause movement in the opposite direction. If it comes to a particularly high pressure peak, the membrane 56 lays against the contact surface 52 and is thereby prevented from further loading. The same applies to an excessive discharge in the delivery line, whereby the diaphragm 56 abuts against the lower contact surfaces 46, 48.

Ein Sensor 70 stellt fest, wenn in die Druckkammer 94 Flüssigkeit eintritt, wodurch angezeigt ist, dass die Membran 56 beschädigt oder zerstört worden ist.A sensor 70 detects when liquid enters the pressure chamber 94, indicating that the diaphragm 56 has been damaged or destroyed.

Die Metallscheibe 58 liegt an der Oberseite frei und hat in einem relativ kleinen axialen Bund 72 eine Gewindebohrung, in welche ein Gewindezapfen 74 axial einer erstreckten Stange 76 eingeschraubt ist. Somit ist die Stange 76 mit der Membran 56 verbunden. Die Stange 76 hat vom oberen freien Ende her eine axiale Bohrung 78. Sie ist außerdem am oberen Ende mit einem ringförmigen Permanentmagneten 80 verbunden. In die Bohrung 78 hinein erstreckt sich ein stabförmiger Positionssensor 82, der mit einer Positionsmeßvorrichtung 84 verbunden ist. Je nach Relativlage von Stabsensor 82 und Permanentmagnet 80 wird ein entsprechendes Positionssignal erzeugt, das in einer nicht gezeigten Regeleinrichtung mit einem Sollwertbereich für die Lage der Membran 56 verglichen wird. Bei Abweichung von dem Sollwertbereich wird entweder der Druck in der Druckkammer 94 erhöht oder erniedrigt. Zu diesem Zweck werden von der Regelvorrichtung die Ventile 32 bzw. 26 angesteuert, wobei das Mengenregelventil 30 dafür sorgt, mit welcher Menge pro Zeit Gas aus der Druckquelle (nicht gezeigt) in die Druckkammer 94 strömt.The metal disk 58 is exposed at the top and has in a relatively small axial collar 72 a threaded bore into which a threaded pin 74 is axially screwed to an extended rod 76. Thus, the rod 76 is connected to the diaphragm 56. The rod 76 has an axial bore 78 from the upper free end. It is also connected at the upper end to an annular permanent magnet 80. Into the bore 78 extends a rod-shaped position sensor 82 which is connected to a position measuring device 84. Depending on the relative position of rod sensor 82 and permanent magnet 80, a corresponding position signal is generated, which is compared in a control device, not shown, with a desired value range for the position of the diaphragm 56. In deviation from the setpoint range, either the pressure in the pressure chamber 94 is increased or decreased. For this purpose, the valves 32 and 26 are controlled by the control device, wherein the flow control valve 30 ensures the amount of gas per time from the pressure source (not shown) flows into the pressure chamber 94.

In die Decke 14 ist mittig ein Block 86 eingelassen und darin zum Beispiel verschweißt. Mittels Schrauben ist ein weiterer Block 88 mit dem Block 86 verschraubt. Zwischen den Blöcken 86, 88 wird eine Hülse 90 gehalten, welche als Führung für die Stange 76 dient. Außerdem dient der obere Block 88 zur Halterung der Positionsmeßvorrichtung 84, die über ein Kabel 92 mit der nicht gezeigten Regelvorrichtung in Verbindung ist.In the ceiling 14, a block 86 is inserted centrally and welded in it, for example. By means of screws, a further block 88 is screwed to the block 86. Between the blocks 86, 88 a sleeve 90 is held, which serves as a guide for the rod 76. In addition, the upper block 88 serves to support the position measuring device 84, which is connected via a cable 92 with the control device, not shown in connection.

Wie erkennbar, ist die Positions- bzw. Lagemeßvorrichtung für die Membran 56 innerhalb des Behälters 12 untergebracht und daher gegen äußere Einwirkungen geschützt. Die Membran 56 wird gegen Überlastungen geschützt, kann daher bei Spitzenbelastungen nicht reißen oder dergleichen.As can be seen, the position or attitude measuring device for the membrane 56 is housed within the container 12 and therefore protected against external influences. The membrane 56 is protected against overloads, therefore can not tear at peak loads or the like.

Claims (5)

  1. A pulsation damper for feed pumps, conveying in a pulsed manner, having a container, which is closed on one end by a flexible membrane, which has an upper and a lower end position, whereby in the container a pressure chamber of changing volume is formed that can be connected, using a switching valve, to a gas pressure source, and having a control device for the position of the membrane with which the excursion of the membrane during pressure changes in the pressure chamber is limited within predefined limits between the end positions, wherein connected to the membrane (56) is a rod (76) extending axially in the pressure chamber (94) that holds at least one permanent magnet (80), and a position measuring device is present which is connected to the container (12) and acting together with the permanent magnet, and which generates an actual value for the position of the membrane that is compared in the control device with a target value range for the purpose of actuating the switching valve (32) or a venting valve (26), depending on the measure of the control deviation, characterized in that the position measuring device (84) has a position sensor (82) that is disposed in the pressure chamber (94).
  2. The pulsation damper according to Claim 1, characterized in that a metal disk (58) has a threaded bore in the center, into which a threaded section (74) of the rod (76) is screwed.
  3. The pulsation damper according to Claim 2, characterized in that the membrane (56) is conical in a section (60) bordering on the metal disk (58), and the conical section (60) transitions into a section (62) with a curved cross-section, which in the target position of the membrane (56) partially abuts on the conical contact surface (46) of the lower bottom section (40).
  4. The pulsation damper according to one of the Claims 1 to 3, characterized in that the rod (76) is guided in a sleeve (90), which is attached to the cover (14) of the container (12).
  5. The pulsation damper according to one of the Claims 1 to 4, characterized in that from the free end of the rod (76), an axial bore (78) is formed, into which a sensor wand (82) of the position measuring device is immersed.
EP06022896A 2006-01-31 2006-11-03 Pulsation damper Active EP1813809B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06022896T PL1813809T3 (en) 2006-01-31 2006-11-03 Pulsation damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006004251A DE102006004251A1 (en) 2006-01-31 2006-01-31 pulsation dampers

Publications (2)

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EP1813809A1 EP1813809A1 (en) 2007-08-01
EP1813809B1 true EP1813809B1 (en) 2010-05-26

Family

ID=37661631

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Application Number Title Priority Date Filing Date
EP06022896A Active EP1813809B1 (en) 2006-01-31 2006-11-03 Pulsation damper

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EP (1) EP1813809B1 (en)
AT (1) ATE469300T1 (en)
DE (2) DE102006004251A1 (en)
ES (1) ES2342095T3 (en)
PL (1) PL1813809T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104564617B (en) * 2014-12-19 2017-12-08 沈阳远大压缩机有限公司 A kind of cylinder cover structure for being applied to prevent gas compressor cylinder liquid hammer
EP3730789B1 (en) * 2019-04-23 2021-06-16 Secop GmbH Refrigerant compressor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505856B2 (en) * 1975-02-12 1976-12-09 Burdosa Ing. Herwig Burgert, 6300 Giessen PROCESS AND DEVICE FOR INDEPENDENT REGULATION OF THE PRESSURE IN A PULSATION DAMPER
JPS57177486A (en) * 1981-04-22 1982-11-01 Sharp Kk Ripple regulator in liquid feeder
DE4031239A1 (en) * 1990-10-04 1992-04-09 Kaltenberg Hans Georg Adjustable pressure pulse damper for piston pumps - has nitrogen@-filled damping vol. bounded by membrane at end of plunger with magnetic position feedback
DE19946258C2 (en) * 1998-09-28 2002-06-20 Manfred Schmidt Pulsation damper for use in a pipe system for liquids
ATE295936T1 (en) * 2003-10-02 2005-06-15 Feluwa Pumpen Gmbh WIND COOKER

Also Published As

Publication number Publication date
ATE469300T1 (en) 2010-06-15
ES2342095T3 (en) 2010-07-01
PL1813809T3 (en) 2010-10-29
DE502006007021D1 (en) 2010-07-08
EP1813809A1 (en) 2007-08-01
DE102006004251A1 (en) 2007-08-02

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