AT125089B - Compensating device for offset double pumps. - Google Patents

Compensating device for offset double pumps.

Info

Publication number
AT125089B
AT125089B AT125089DA AT125089B AT 125089 B AT125089 B AT 125089B AT 125089D A AT125089D A AT 125089DA AT 125089 B AT125089 B AT 125089B
Authority
AT
Austria
Prior art keywords
compensating device
double pumps
offset double
stroke
pumps
Prior art date
Application number
Other languages
German (de)
Original Assignee
Knorr Bremse Ag
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 Knorr Bremse Ag filed Critical Knorr Bremse Ag
Application granted granted Critical
Publication of AT125089B publication Critical patent/AT125089B/en

Links

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
    • 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
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



    Ausgleici hvornchtnng   für versetzt arbeitende Doppelpumpen. 



   Bei Doppelpumpen mit versetzt arbeitenden Kolben, bei denen der eine Kolben seinen Hub beginnt, wenn der andere sieh in der Mitte seines Hubes oder angenähert in dieser sich befindet, zeigt es sich, dass im Druckrohr unliebsame Druckerhöhungen auftreten, wenn der zweite Pumpenkolben seinen Hub beginnt. Diese Erscheinung   erklärt sich   daraus, dass die Kraftäusserung des Dampfkolbens zu Beginn des Hubes ihren grössten Wert hat und dann nach einer Kurve abfällt. Wenn nun der erste Kolben die Mitte seines Hubes erreicht hat und demgemäss der von ihm ausgeübte Kraftaufwand geringer ist als zu Beginn seiner Bewegung, so tritt der zweite Kolben mit der der   Anfangsbewegung entsprechenden   grossen Energie in Tätigkeit.

   Auch bei solchen Duplexpumpen, bei denen die Triebkraft während des Hubes keine   Veränderung   erfährt. tritt die erwähnte Erscheinung infolge des Hinzutretens der Tätigkeit des zweiten Kolbens auf. Dementsprechend wird auf das Wasser im Druckrohr   plötzlich   ein erheblich 
 EMI1.1 
 
 EMI1.2 
 

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



   <Desc / Clms Page number 1>
 



    Compensation for offset double pumps.



   In double pumps with offset working pistons, in which one piston begins its stroke when the other is in the middle of its stroke or is close to it, it becomes apparent that unpleasant pressure increases occur in the pressure pipe when the second pump piston begins its stroke . This phenomenon is explained by the fact that the force exerted by the steam piston has its greatest value at the beginning of the stroke and then drops after a curve. When the first piston has now reached the middle of its stroke and accordingly the force exerted by it is less than at the beginning of its movement, the second piston comes into action with the high energy corresponding to the initial movement.

   Even with those duplex pumps in which the driving force does not change during the stroke. the above-mentioned phenomenon occurs as a result of the action of the second piston. Accordingly, the water in the pressure pipe suddenly becomes significantly affected
 EMI1.1
 
 EMI1.2
 

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

Claims (1)

EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT125089D 1929-04-26 1930-04-08 Compensating device for offset double pumps. AT125089B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE694164X 1929-04-26

Publications (1)

Publication Number Publication Date
AT125089B true AT125089B (en) 1931-10-26

Family

ID=6605950

Family Applications (1)

Application Number Title Priority Date Filing Date
AT125089D AT125089B (en) 1929-04-26 1930-04-08 Compensating device for offset double pumps.

Country Status (4)

Country Link
US (1) US1857864A (en)
AT (1) AT125089B (en)
FR (1) FR694164A (en)
GB (1) GB341355A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141676A (en) * 1977-06-02 1979-02-27 John Blue Company Division Of Subscription Television, Inc. Pump for soil fumigant

Also Published As

Publication number Publication date
FR694164A (en) 1930-12-01
US1857864A (en) 1932-05-10
GB341355A (en) 1931-01-15

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