US1857864A - Duplex pump - Google Patents

Duplex pump Download PDF

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Publication number
US1857864A
US1857864A US446681A US44668130A US1857864A US 1857864 A US1857864 A US 1857864A US 446681 A US446681 A US 446681A US 44668130 A US44668130 A US 44668130A US 1857864 A US1857864 A US 1857864A
Authority
US
United States
Prior art keywords
pump
plunger
pressure
stroke
duplex
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.)
Expired - Lifetime
Application number
US446681A
Other languages
English (en)
Inventor
Peters Hans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knorr Bremse AG
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 US1857864A publication Critical patent/US1857864A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates to duplex pumps of the kind in which the plungers or pistons in the two cylinders are in staggered arrangement so that one plunger is about midway in its operative stroke when the other plunger begins its operative stroke. It has been found that an undesirable increase of pressure takes place in the pressure pipe when the second plungerybegins its stroke, especially in steam pumps where the exertion of force is at stroke and then declines according to a curve, and thus the force exerted by the first plunger is reduced at the middle of its stroke when 15. the second plunger comes into operation with its full initial energy; but even in duplex pumps where the driving force is constant throughout the stroke, the same efi'ect occurs when the second plunger comes into. operation.
  • nozzle in the pressure pipe, to which nozzle the currents of liquid arrivin under pressure from the two pump cylin ers are guided separately and combine within the diffuser of the said nozzle.
  • This nozzle is connected by a suitable union with the water space of each cylinder and its diffuser opens into the pressure pipe, which may lead to a boiler or preheater.
  • a' diffuser located at the junction of said pipe with the connections from said outlets, said difli'user comprising a constricted neck and co-axial annular passages converging towards said neck, each of said passages being separately in communication with one of said connections, whereby the reactionof one pump plunger at the beginning of its stroke upon the other pump plunger which is simultaneously at the middle of its stroke is avoided.

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)
US446681A 1929-04-26 1930-04-23 Duplex pump Expired - Lifetime US1857864A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
US1857864A true US1857864A (en) 1932-05-10

Family

ID=6605950

Family Applications (1)

Application Number Title Priority Date Filing Date
US446681A Expired - Lifetime US1857864A (en) 1929-04-26 1930-04-23 Duplex pump

Country Status (4)

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

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 (fr) 1930-12-01
GB341355A (en) 1931-01-15
AT125089B (de) 1931-10-26

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