AT68782B - Control method for steam engines with back pressure and control of the outlet. - Google Patents

Control method for steam engines with back pressure and control of the outlet.

Info

Publication number
AT68782B
AT68782B AT68782DA AT68782B AT 68782 B AT68782 B AT 68782B AT 68782D A AT68782D A AT 68782DA AT 68782 B AT68782 B AT 68782B
Authority
AT
Austria
Prior art keywords
control
back pressure
outlet
steam engines
control method
Prior art date
Application number
Other languages
German (de)
Original Assignee
Actien Ges Goerlitzer Maschb A
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 Actien Ges Goerlitzer Maschb A filed Critical Actien Ges Goerlitzer Maschb A
Application granted granted Critical
Publication of AT68782B publication Critical patent/AT68782B/en

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  • Measuring Fluid Pressure (AREA)
  • Control Of Turbines (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
Bei Dampfmaschinen, insbesondere solchen mit Gegendruck oder mit Dampfentnahme au dem Aufnehmer, zeigt sich der Übelstand, dass bei kleinen Füllungen und grösserem Gegenbzw.   Entnahmedruck   im Diagramm eine Expansionsschleife entsteht. In gleicher Weise ent- 
 EMI1.2 
 derart beeinflusst wird, dass entweder die Ausströmung dann eingeleitet wird, wenn die   ExpanaionsUnie   die Gegendrucklinie schneidet   (Vorausströmung),   oder dass die Ausströmung erst beginnt, bis die Kompressionslinie die Gegendrucklinie schneidet (Nachausströmung).

   Die Wirkung ist in beiden Fällen gleich.   tberdies können   bei dem Verfahren nach der Erfindung bei wechselndem Gegendruck die Kompressionsscbleifen vermieden werden, und zwar dadurch, dass der Druckregler die Ausströmung derart beeinflusst, dass sie in dem Punkte beendet wird, in welchem die dem Diagramm für normalen Gegendruck zugrundegelegte Kompressionslinie die veränderte gegendrucklime schneiden würde. 



   In der Zeichnung zeigt Fig. 1 das Arbeiten der Maschine mit Schlerfenbildung. Fig. 2 das Arbeiten der Maschine ohne Schleifenbildung unter Beeinflussung der   V orausströmul1g. Fig.   3 das Arbeiten der   Maschine   ohne Schleifenbildung unter Beeinflussung der Nachausströmung. 



   Bei der bekannten Arbeitsweise   gemäss   Fig. 1 verlaufen die   Expanionslinien (a-d) be-   
 EMI1.3 
 Beginn des Ausströmens im Totpunkte entstehen Expansionsschleifen Die   Kompressionslmet)   beginnen in bestimmtem, gleichbleibendem Abstand vom Totpunkt, Bei höherem Gegendruck entstehen Kompressionsschleifen. Die schraffieert gerzeichnete Fläche zeigt die Grösse der infolge der Expansionsschleifen auftretenden Gegendruckarbeit, d h. den   Dampíverlu5t   gemessen m Arbeit. 



   Bei dem Regelungsverfahren nach der   Erfindung   verlaufen die Expansionshnien gemäss 
 EMI1.4 
 mit der Expansionshnie sich deckende Kompressionslinie die Gegendrucklinie schneidet. 



   Der Schluss der Ausströmung (bei dem Verfahren gemäss Fig. 3 also der Beginn der Weiter- 
 EMI1.5 
 



    PATENT-ANSPRÜCHE: 1. Regelungsverfahren für Dampfmaschinen mit Gegendruck und Regelung des Auslasses,   
 EMI1.6 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 
 EMI1.1
 
In steam engines, especially those with counter pressure or with steam extraction from the transducer, the inconvenience is that with small fillings and larger counter or. Withdrawal pressure in the diagram an expansion loop is created. In the same way,
 EMI1.2
 is influenced in such a way that either the outflow is initiated when the expansion unit intersects the counterpressure line (pre-flow), or that the outflow only begins until the compression line intersects the counterpressure line (post-flow).

   The effect is the same in both cases. Moreover, with the method according to the invention, the compression loops can be avoided when the back pressure changes, namely in that the pressure regulator influences the outflow in such a way that it is ended at the point at which the compression line on which the diagram for normal back pressure is based intersects the changed back pressure limit would.



   In the drawing, Fig. 1 shows the operation of the machine with Schlerfenbildung. Fig. 2 shows how the machine works without the formation of loops while influencing the V orausströmul1g. 3 shows the operation of the machine without the formation of loops while influencing the post-flow.



   In the known mode of operation according to FIG. 1, the expansion lines (a-d) run
 EMI1.3
 The outflow begins at the dead center. The compression loops begin at a certain, constant distance from the dead center. At higher back pressure, compression loops occur. The hatched area shows the size of the counter-pressure work that occurs as a result of the expansion loops, i.e. the Dampíverlu5t measured m work.



   In the control method according to the invention, the expansion curves run according to
 EMI1.4
 with the expansion line congruent compression line intersects the counterpressure line.



   The end of the outflow (in the case of the method according to FIG. 3, i.e. the beginning of the further
 EMI1.5
 



    PATENT CLAIMS: 1. Control method for steam engines with back pressure and control of the outlet,
 EMI1.6
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

**WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT68782D 1913-03-12 1913-03-12 Control method for steam engines with back pressure and control of the outlet. AT68782B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT68782T 1913-03-12

Publications (1)

Publication Number Publication Date
AT68782B true AT68782B (en) 1915-05-25

Family

ID=3590674

Family Applications (1)

Application Number Title Priority Date Filing Date
AT68782D AT68782B (en) 1913-03-12 1913-03-12 Control method for steam engines with back pressure and control of the outlet.

Country Status (1)

Country Link
AT (1) AT68782B (en)

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