CH264074A - Process for regulating the operating medium of hydraulic systems to constant pressure and control device for carrying out the process. - Google Patents

Process for regulating the operating medium of hydraulic systems to constant pressure and control device for carrying out the process.

Info

Publication number
CH264074A
CH264074A CH264074DA CH264074A CH 264074 A CH264074 A CH 264074A CH 264074D A CH264074D A CH 264074DA CH 264074 A CH264074 A CH 264074A
Authority
CH
Switzerland
Prior art keywords
operating medium
pressure
regulating
control device
carrying
Prior art date
Application number
Other languages
German (de)
Inventor
Industrie-Gesel Schweizerische
Original Assignee
Sig Schweiz Industrieges
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 Sig Schweiz Industrieges filed Critical Sig Schweiz Industrieges
Publication of CH264074A publication Critical patent/CH264074A/en

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00Control of fluid pressure
    • G05D16/04Control of fluid pressure without auxiliary power
    • G05D16/10Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00Control of fluid pressure
    • G05D16/14Control of fluid pressure with auxiliary non-electric power
    • G05D16/16Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid
    • G05D16/166Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid using pistons within the main valve
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00Control of fluid pressure
    • G05D16/024Controlling the inlet pressure, e.g. back-pressure regulator

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Control Of Fluid Pressure (AREA)

Description

  

      Verfahren    zur Regelung des Betriebsmediums     hydraulischer    Anlagen auf konstanten       Druck    und     Regeleinrichtung    zur     Durchführung    des Verfahrens.    Die Erfindung betrifft ein Verfahren und  eine Einrichtung zur Regelung des Betriebs  mediums hydraulischer Anlagen auf konstan  ten Druck. Das Verfahren zeichnet sich da  durch aus, dass das durch     Druekreduzier-          mittel    im Druck verminderte Betriebsmedium  zur Belastung des     Regelorganes    herangezogen  wird.  



  In beiliegender Zeichnung ist der Erfin  dungsgegenstand in einer beispielsweisen Aus  führungsform dargestellt, an Hand welcher  auch ein beispielsweises Verfahren beschrie  ben ist.  



  Das Ventilgehäuse 1 erhält das Betriebs  medium von einer nicht dargestellten Pumpe  durch Kanal 2 zugeführt. Ein Differential  kolben 3 ist verschiebbar im Ventilgehäuse 1  gelagert und ist an der kleineren Fläche im       Raum    4 dem Betriebsmedium direkt ausge  setzt. Durch die Drosselbohrung 5 gelangt das  Betriebsmedium ferner in den Kanal 6, wel  cher es in den Raum 7 auf die grössere Fläche  des Differentialkolbens führt. Das durch die       Drosselbohrung    5 in den Kanal 6 strömende  Betriebsmedium erfährt durch die Drosselung  eine Druckminderung. Mittels des Kugelven  tils 8, der Feder 9 und der Schraube 10 kann  der Druck im Kanal 6 und damit im Raum 7  beliebig eingestellt werden.  



  Das durch das Kugelventil 8 abströmende  Betriebsmedium wird durch die Bohrung 11    dem Ringraum 12 zugeführt, welcher durch  den Anschluss 1.3 mit dem     Abfluss    in Verbin  dung steht. Der Druck im Raum 7 verhält  sich zum Druck im Raum 4 wie die kleinere  Fläche des Differentialkolbens 3 zur grösseren  Fläche. Da die Belastungskraft der grösseren  Fläche des Differentialkolbens 3 bei jeder  Kolbenstellung konstant ist, wird bei Gleich  gewicht auch die auf die kleinere Fläche des  Differentialkolbens 3 wirkende Kraft und da  mit der Druck stets derselbe sein unabhängig  von der Bedarfsmenge. Der Differentialkol  ben 3 steuert demzufolge den Abfluss des Be  triebsmediums derart, dass im Raum 4, im  Kanal 2 und damit in der Zuführungsleitung  konstanter Druck herrscht.

   Für ein zuver  lässiges Arbeiten der Regeleinrichtung ist es  vorteilhaft, wenn der     A.bflussquerschnit,t    des  den Abfluss steuernden Differentialkolbens  sich mit dem Kolbenhub allmählich vergrö  ssert, so dass dem Differentialkolben bei Men  genänderungen ein verhältnismässig grosser  Hub aufgezwungen wird. Dies kann, wie bei  spielsweise gezeigt, durch allmählich sich ver  grössernde Kerben 15 an der Steuerkante des  Kolbens geschehen. Das Ventilgehäuse 1. ist  durch den Deckel 14 abgeschlossen.  



       Fig.    2 zeigt die beispielsweise Anordnung  der zur Druckreduzierung verwendeten Dros  selbohrung in einem besonderen Teil 16, der  zwecks leichter Zugänglichkeit z. B. durch       Schraubung    lösbar befestigt ist.



      Process for regulating the operating medium of hydraulic systems to constant pressure and control device for carrying out the process. The invention relates to a method and a device for controlling the operating medium of hydraulic systems on constan th pressure. The process is characterized by the fact that the operating medium, which is reduced in pressure by the pressure reducing agent, is used to load the control element.



  In the accompanying drawing, the subject of the invention is shown in an exemplary embodiment, based on which an exemplary method is also described.



  The valve housing 1 receives the operating medium from a pump, not shown, supplied through channel 2. A differential piston 3 is slidably mounted in the valve housing 1 and is on the smaller area in space 4, the operating medium is set directly. Through the throttle bore 5, the operating medium also passes into the channel 6, wel cher it leads into the space 7 on the larger area of the differential piston. The operating medium flowing through the throttle bore 5 into the channel 6 experiences a pressure reduction due to the throttling. By means of Kugelven valve 8, spring 9 and screw 10, the pressure in channel 6 and thus in space 7 can be set as desired.



  The operating medium flowing out through the ball valve 8 is fed through the bore 11 to the annular space 12, which is connected to the drain through the port 1.3. The pressure in space 7 is related to the pressure in space 4 as the smaller area of the differential piston 3 is related to the larger area. Since the loading force of the larger area of the differential piston 3 is constant in every piston position, the force acting on the smaller area of the differential piston 3 and the pressure will always be the same regardless of the amount required. The differential piston 3 consequently controls the outflow of the operating medium in such a way that there is constant pressure in space 4, in channel 2 and thus in the supply line.

   For reliable operation of the control device, it is advantageous if the flow cross section of the differential piston controlling the flow increases gradually with the piston stroke, so that a relatively large stroke is imposed on the differential piston when the volume changes. This can be done, as shown in example, by gradually increasing ver notches 15 on the control edge of the piston. The valve housing 1 is closed by the cover 14.



       Fig. 2 shows the example arrangement of the Dros used to reduce pressure selbohrung in a special part 16, the purpose of easy accessibility z. B. is releasably attached by screwing.

 

Claims (1)

PATENTANSPRÜCHE: I. Verfahren zur Regelung des Betriebs- mediums hydraulischer Anlagen auf konstan ten Druck, dadurch gekennzeichnet, dass das durch Durchreduziermittel im Druck vermin derte Betriebsmediiun zur Belastung des Regelorganes herangezogen wird. II. Regeleinrichtung zur Durchführung des Verfahrens nach Patentanspruch I, da durch gekennzeichnet, dass als Regelorgan ein Differentialkolben verwendet ist, welcher den Abfluss aus der hydraulischen Anlage steuert. UNTERANSPRÜCIIE 1. PATENT CLAIMS: I. Method for regulating the operating medium of hydraulic systems to constant pressure, characterized in that the operating medium reduced in pressure by the reducing agent is used to load the regulating element. II. Control device for carrying out the method according to patent claim I, characterized in that a differential piston is used as the control element, which controls the outflow from the hydraulic system. SUBCLAIM 1. Verfahren nach Patentanspruch I, da durch gekennzeichnet, dass zur Druckreduzie rung eine DrosselbohrLmg verwendet wird, durch welche ein Teil des Betriebsmediums in einen Raum abgelassen wird, an welchen ein Druckeinstellventil angeschlossen ist. Einrichtung nach Patentanspruch II, dadurch gekennzeichnet, dass die Steuerkante des Differentialkolbens mit Kerben versehen ist, durch welche der freie Abflussquerschnitt sieh mit dein Kolbenhub allmählich vergrö ssert. 3. Method according to patent claim I, characterized in that a throttle bore is used for pressure reduction, through which part of the operating medium is drained into a space to which a pressure adjustment valve is connected. Device according to patent claim II, characterized in that the control edge of the differential piston is provided with notches through which the free flow cross-section gradually increases with the piston stroke. 3. Einrichtung nach Patentanspruch 1I, zur Durchführung des Verfahrens nach Pa tentanspruch I und Unteranspruch 1, dadurch gekennzeichnet, dass die zur Druckreduzie rung verwendete Drosselbohrung zum Zweck leichter Reinigung in einen lösbar befestigten Teil verlegt ist. Device according to patent claim 1I, for performing the method according to patent claim I and dependent claim 1, characterized in that the throttle bore used for pressure reduction is relocated to a detachably fastened part for the purpose of easier cleaning.
CH264074D 1948-04-09 1948-04-09 Process for regulating the operating medium of hydraulic systems to constant pressure and control device for carrying out the process. CH264074A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH264074T 1948-04-09

Publications (1)

Publication Number Publication Date
CH264074A true CH264074A (en) 1949-09-30

Family

ID=4475126

Family Applications (1)

Application Number Title Priority Date Filing Date
CH264074D CH264074A (en) 1948-04-09 1948-04-09 Process for regulating the operating medium of hydraulic systems to constant pressure and control device for carrying out the process.

Country Status (1)

Country Link
CH (1) CH264074A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672881A (en) * 1950-12-18 1954-03-23 A V Roe Canada Ltd Pressure regulating valve
DE1107038B (en) * 1959-02-12 1961-05-18 Basf Ag Drive device for glandless shut-off or control devices, especially for high pressures
DE1192012B (en) * 1961-02-23 1965-04-29 Ross Operating Valve Co Self-actuating vent valve to be activated by reducing the pressure
FR2609563A1 (en) * 1986-10-24 1988-07-15 Albany Int Corp PRESSURE REGULATING DEVICE, PARTICULARLY FOR A SUCTION BOX OF A PAPERMAKING MACHINE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672881A (en) * 1950-12-18 1954-03-23 A V Roe Canada Ltd Pressure regulating valve
DE1107038B (en) * 1959-02-12 1961-05-18 Basf Ag Drive device for glandless shut-off or control devices, especially for high pressures
DE1192012B (en) * 1961-02-23 1965-04-29 Ross Operating Valve Co Self-actuating vent valve to be activated by reducing the pressure
FR2609563A1 (en) * 1986-10-24 1988-07-15 Albany Int Corp PRESSURE REGULATING DEVICE, PARTICULARLY FOR A SUCTION BOX OF A PAPERMAKING MACHINE

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