US3148627A - Reciprocating pump - Google Patents

Reciprocating pump Download PDF

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Publication number
US3148627A
US3148627A US188432A US18843262A US3148627A US 3148627 A US3148627 A US 3148627A US 188432 A US188432 A US 188432A US 18843262 A US18843262 A US 18843262A US 3148627 A US3148627 A US 3148627A
Authority
US
United States
Prior art keywords
drum
pump
shaft
driving shaft
cylinders
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
US188432A
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English (en)
Inventor
Muller Theodor
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.)
Schweizerische Lokomotiv und Maschinenfabrik AG (SLM)
Original Assignee
Schweizerische Lokomotiv und Maschinenfabrik AG (SLM)
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 Schweizerische Lokomotiv und Maschinenfabrik AG (SLM) filed Critical Schweizerische Lokomotiv und Maschinenfabrik AG (SLM)
Application granted granted Critical
Publication of US3148627A publication Critical patent/US3148627A/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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
    • F04B1/1072—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks with cylinder blocks and actuating cams rotating together

Definitions

  • the invention relates to a piston pump assembly for delivery of liquids, comprising a pump casing, a cylinder block in which the pistons are guided, a shaft for producing the reciprocating motion of the pistons, admission and delivery ducts for the liquid, and control members for alternately connecting the cylinder spaces with the suction and pressure chambers of the pump.
  • the pump casing is directly and rigidly connected for rotation with a flange formed on the shaft of the driving motor, while the pump to which the suction and delivery ducts are connected, is maintained stationary at its end projecting from the pump casing.
  • FIGURE 1 is an axial section through the pump taken along line I--I of FIGURE 2;
  • FIGURE 2 represents the pump partly in transverse section along line IIII of FIGURE 1, and partly in elevation in the direction of the arrow A in FIGURE 1.
  • the casing of the pump consists of the two rotor halves 1 and 2, and is rigidly connected by means of screws 3 to a coupling flange 5 keyed to the motor shaft 4, and accordingly rotates with the motor shaft.
  • a shaft 6 is mounted in ball bearings 7 and 8 carried in the casing 1 and 2.
  • the stationary shaft 6 is provided with a control crank pin 10 which is eccentric relatively to the axis of the shaft.
  • a cylinder block 11 is rotatably mounted on the crank pin 10 and is coupled by means of two auxiliary cranks 12 with the rotor half 1, so as to rotate exactly in synchronism with the rotor casing.
  • Admission and delivery of liquid to and from the cylinders 14 is effected by the alternate connection of the cylinders with the recessed portions 15, 16 respectively, of the control pin 10, which recesses serve as suction and pressure chambers. These chambers are connected by separate ducts 19 and 20 with the suction conduit 21 and the delivery conduit 22, respectively.
  • the pistons 23 have their outer ends 24 slidingly bearing against plates 25. For keeping the frictional forces low, the piston ends can be formed for example, as disclosed in my prior specification No. 2,679,- 210.
  • the two rotor halves 1, 2 are secured together by screws 26.
  • the shaft 6 When the pump operates under pressure, the shaft 6 must be maintained stationary by a torque which is equal 3,148,627 Patented Sept. 15, 1964- ice to the motor torque.
  • the delivery conduit 22 which is screwed to the shaft 6 by increasing the strength of the conduit and anchoring it at a point 28 situated at a radial distance 29 from the axis of the shaft.
  • the force to be absorbed by the anchoring 28 at a distance of 0.5 meter from the axis of the shaft 6 amounts to about 100 kgs. only.
  • the distance 30 between the plane where this force is effective and the motor bearing adjacent the pump is to be selected so that the bending moment produced at the motor shaft is not greater than the bending movement exerted by the smallest admissible belt pulley on the motor shaft; this requirement can be met without difficulty in radial piston pumps of axially short overall length.
  • a bore 36 in the shaft 6 communicates with the inner space of the rotor casing 1, 2 by a duct, not shown, and serves for connection with a leak-oil discharge pipe.
  • the pump assembly according to the invention is distinguished by its simple design and offers the advantage that the rotating pump casing 1, 2 affords an eflicient cooling of the pump.
  • the portion 1 and the flange 5 could form an integral part.
  • a reciprocating constant delivery fluid pump assembly comprising a driving shaft, a pump drum connected rigidly with said driving shaft, a cylinder block having radial cylinders mounted within said drum and connected to said drum for rotation therewith, a fixed eccentric pin having ducts and control slots for the fluid supporting said cylinder block, a plurality of pistons supported on said drum movable relatively to said cylinders, said pump drum being mounted in overhung position on said driving shaft, a shaft on which said eccentric pin is mounted within said drum aligned with said driving shaft and means maintaining said shaft with said pin stationary, whereby any outer pump casing is rendered superfluous.
  • a reciprocating pump according to claim 1 in which said eccentric pin is maintained stationary by means of a conduit connected to one of said ducts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US188432A 1961-04-28 1962-04-18 Reciprocating pump Expired - Lifetime US3148627A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH497861A CH406853A (de) 1961-04-28 1961-04-28 Kolbenpumpe

Publications (1)

Publication Number Publication Date
US3148627A true US3148627A (en) 1964-09-15

Family

ID=4285824

Family Applications (1)

Application Number Title Priority Date Filing Date
US188432A Expired - Lifetime US3148627A (en) 1961-04-28 1962-04-18 Reciprocating pump

Country Status (3)

Country Link
US (1) US3148627A (de)
CH (1) CH406853A (de)
GB (1) GB995651A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968734A (en) * 1973-10-15 1976-07-13 Sulzer Brothers Limited Hydrostatic piston machine
US4033237A (en) * 1973-11-02 1977-07-05 Sulzer Brothers Limited Hydrostatic piston machine having small clearances between bearing surfaces
WO1993008373A1 (en) * 1991-10-25 1993-04-29 Gosta Ingvald Hook Rotary machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2341013C2 (de) * 1973-08-14 1982-08-05 Alfred Teves Gmbh, 6000 Frankfurt Radialkolbenpumpe
US5911561A (en) * 1995-01-05 1999-06-15 Linear Anstalt Radial pump with static eccentric and rotatable cylinders
AU4390496A (en) * 1995-01-05 1996-07-24 Linear Anstalt Pump for conveying a medium
DE102017128098B4 (de) * 2017-11-28 2023-07-20 Hoerbiger Automotive Komfortsysteme Gmbh Hydraulisches System mit einer durch einen Elektromotor angetriebenen Radialkolbenpumpe, mit Pumpenrotor und Elektromotorrotor, die auf einem gemeinsamen Lagerzapfen auf achsversetzt parallel zueinander angeordneten Achsen drehbar gelagert sind

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194914A (en) * 1937-10-29 1940-03-26 Baldwin Locomotive Works Hydraulic material testing apparatus
US2203646A (en) * 1936-03-07 1940-06-04 Aspden Ernest Wallace Pump
US2349280A (en) * 1942-03-18 1944-05-23 Joseph F Joy Pump
US2663264A (en) * 1950-07-19 1953-12-22 Michalitsianos Evangel Michael Rotary pump
GB730086A (en) * 1950-09-27 1955-05-18 United Aircraft Corp Improvements in or relating to rotary pumps

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2203646A (en) * 1936-03-07 1940-06-04 Aspden Ernest Wallace Pump
US2194914A (en) * 1937-10-29 1940-03-26 Baldwin Locomotive Works Hydraulic material testing apparatus
US2349280A (en) * 1942-03-18 1944-05-23 Joseph F Joy Pump
US2663264A (en) * 1950-07-19 1953-12-22 Michalitsianos Evangel Michael Rotary pump
GB730086A (en) * 1950-09-27 1955-05-18 United Aircraft Corp Improvements in or relating to rotary pumps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968734A (en) * 1973-10-15 1976-07-13 Sulzer Brothers Limited Hydrostatic piston machine
US4033237A (en) * 1973-11-02 1977-07-05 Sulzer Brothers Limited Hydrostatic piston machine having small clearances between bearing surfaces
WO1993008373A1 (en) * 1991-10-25 1993-04-29 Gosta Ingvald Hook Rotary machine

Also Published As

Publication number Publication date
CH406853A (de) 1966-01-31
GB995651A (en) 1965-06-23

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