US3885893A - Multiple cylinder pump - Google Patents

Multiple cylinder pump Download PDF

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Publication number
US3885893A
US3885893A US461713A US46171374A US3885893A US 3885893 A US3885893 A US 3885893A US 461713 A US461713 A US 461713A US 46171374 A US46171374 A US 46171374A US 3885893 A US3885893 A US 3885893A
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US
United States
Prior art keywords
manifold
pump
set forth
valve plate
guide pins
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
US461713A
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English (en)
Inventor
Wilfried Glock
Ludwig Axthammer
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.)
ZF Friedrichshafen AG
Original Assignee
Fichtel and Sachs 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 Fichtel and Sachs AG filed Critical Fichtel and Sachs AG
Application granted granted Critical
Publication of US3885893A publication Critical patent/US3885893A/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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F04B7/045—Two pistons coacting within one cylinder
    • 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
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y10T137/7839—Dividing and recombining in a single flow path
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7859—Single head, plural ports in parallel

Definitions

  • MULTIPLE CYLINDER PUMP This invention relates to multiple-cylinder pumps in which a rotating shaft actuates sequential reciprocating movement of pistons in a plurality of cylinders connected to a common intake cavity for receiving fluid and connected to a common manifold by respective outlet conduits for discharging the pumped fluid. More particularly, this invention is concerned with an improved check valve arrangement in the outlet conduits for permitting fluid flow in a direction from each cylinder toward the manifold while impeding or preventing fluid flow in the opposite direction.
  • the multiple cylinders of the pumps with which this invention is concerned may be packed closely to form a compact device producing a continuous stream of fluid under pressure. They rely for proper operation on their check valves, and it has been difficult heretofore to provide a pump of the type described and having a relatively large number of cylinders with check valves that are effective, yet do not occupy more space than can readily be made available without significantly increasing the overall bulk of the pump.
  • the invention provides a multiple cylinder pump with a plurality of individual first valves respectively associated with the outlet conduits of the severalcylinders.
  • Each check valve includes an elongated valve plate arranged in the common outlet manifold and guided transversely to its direction of elongation toward and away from a position of sealing engagement with the orifice of the associated outlet conduit, the orifices of the conduits being circumferentially spaced in the manifold about the axis of the drive shaft.
  • the guide arrangement includes guide pins circumferentially spaced in the manifold, two longitudinally spaced portions of'each valve plate slidably engaging respective guide pins.
  • FIG. 1 shows a radial piston pump according to the invention in axial section on the line 1-] in FIG. 2;
  • FIG. 2 shows the pump of FIG. 1 in radial section on the line IIII;
  • FIG. 3 illustrates a portion of the same pump in enlarged section on the line IIIIII;
  • FIG. 4 shows a modification of the device of FIG. 3 in a corresponding view
  • FIG. 5 shows a valve plate common to the devices of FIGS. 1 to 4 on a smaller scale
  • FIG. 6 illustrates a check valve assembly of the invention including the device of FIG. 4 in a fragmentary view corresponding to that of FIG. 1, but on a larger scale;
  • FIG. 7 shows the assembly of FIG. 6 in a view corresponding to that of FIG. 2;
  • FIGS. 8 and 9 illustrate a modified check valve assembly in respective views analogous to those of FIGS. 6 and 7.
  • a radial piston pump whose housing consists of a generally cup-shaped body portion I2 and a cover portion 13 attached to the body portion by bolts 21 and closing a cavity 10 in the body portion.
  • a drive shaft 2 is journaled in antifriction bearings in the housing 12, 1 3 and projects axially from the housing. It carries a fixed eccentric, cylindrical cam l in the cavity 10.
  • a sleeve 26 is rotatably interposed between the cylindrical face of the cam I and a cylindrical contact ring 27.
  • Eight cylinder bores 5 radiate from the cavity 10 in the body portion 12 in equiangularly spaced relationship.
  • the bores 5 are altematingly arranged in two axially offset planes to permit their tightly packed arrangement.
  • Each bore 5 is sealed in a radially outward direction by a threaded plug 14 and receives a hollow piston 3.
  • a helical compression spring 18 interposed between the plug 14 and the piston 3 holds the piston radially against the contact ring 27.
  • the piston 3 sealingly engages a shoulder on the associated cylinder wall near the cavity 10 except in the radially innermost position of the piston when ports 11 in the piston communicate with the cavity 10. 1
  • An axial outlet conduit 6 leads out'ofeach cylinder bore 5 into a circular manifold duct 4.
  • a discharge conduit 9 leads outward of the housing 12, 13 from the manifold duct 4, and a similar intake conduit, not specifically illustrated, leads into the cavity 10 for supplying the fluid to be pumped which is ultimately discharged from the conduit 9.
  • the structure described so far is largely conventional and may be mounted in a small space by means of lugs 20 on the housing 12, 13.
  • a pump of the type illustrated needs check valves for interrupting communication between the manifold duct 4 and each cylinder bore 5 during the suction stroke of the piston 3, and this invention particularly relates to the check valve assembly 22.
  • the orifices of the conduits 6 are spaced 45 apart in the manifold duct 4, and seven guide pins 15 are circumferentially centered between successive orifices,'two additional guide pins 15 being arranged between the two conduit orifices at the bottom of FIG. 2, only the rivet heads 19 of the nine guide pins being seen in FIG. 2 above a flat, circular connecting ring 17 fixedly fastened to the pins 15 by the heads 19.
  • the connecting ring 17 is a sheet metal stamping received in the manifold duct 4 with much clearance, as is best seen in FIG. 3.
  • One longitudinal end portion of each pin 15 is received in a blind, axial bore 16 of the body portion 12 with a friction fit.
  • the pins 15 axially guide eight identical valve plates 7 of which one is seen in FIG. 5.
  • Each valve plate is a segment, slightly shorter than 45, of a flat, sheet metal ring.
  • the radial width of each plate 7 is much smaller than its circumferential length, and much greater than the axial thickness of the plate 7.
  • the two longitudinal end portions of the plate 7 are each formed with a through-bore or passage 8 between the two major plate faces, and each of the narrow, transverse end faces is formed with an approximately semicircular notch 23.
  • each valve plate 7 fits circumferentially between two of the seven evenly spaced guide pins 15 and slidably receives the longitudinal portions of the two associated guide pins outside the bores 16 in its two notches 23.
  • the two valve plates 7 near the bottom of each of FIGS. 2 and 7 engage one guide pin in a notch 23 while slidably receiving another guide pin in a bore 8 so that their adjacent notches 23 bound an open gap in the annular array of valve plates 7.
  • each piston 3 During the radially inward suction stroke of each piston 3, the associated valve plate 7 is moved quickly on the engaged guide pin 15 toward the orifice of the corresponding outlet conduit 6 by fluid drawn from the manifold 4 and seals the engaged orifice.
  • the cylinder bore 5 When the ports 11 communicate with the cavity 10, the cylinder bore 5 is filled with fluid.
  • the fluid is driven into the conduit 6, lifts the plate 7, and flows into the manifold 4. Fluid flow is facilitated, and the opening movement of the valve plate 7 is hastened by the bores or passages 8. The opening movement of the valve plate 7 is limited by abutment against the connector ring 17. Fluid is released from the manifold duct 4 through the discharge conduit 9 whose orifice is located where the gap in the array of valve plates 7, described above with reference to FIG. 7, provides a minimum of flow resistance.
  • the valve assembly consisting of the connector ring 17, the guide pins riveted to the ring, and the valve plates 7 whose longitudinally terminal portions receive respective pins 15 either in the notches 23 or the bores 8, may be installed as a unit on the body portion 12 immediately before construction of the pump is completed by fastening the cover portion 13.
  • the pins 15 are simultaneously forced into the bores 16 whose distribution about the circumference of the manifold duct 4 in the body portion 12 is evident from the location of the rivet heads 19 in FIG. 2 or 7.
  • a pump including wall means defining an intake cavity, a shaft having an axis and mounted for rotation about said axis, a plurality of cylinders communicating with said cavity and extending from the same in angularly spaced relationship relative to said axis, a piston movable in each cylinder, an outlet conduit communicating with each cylinder, actuating means on said shaft for sequentially moving said pistons in the respective cylinders during rotation of said shaft and for thereby pumping fluid from said cavity to said conduits, an annular manifold communicating with said conduits and circumferentially extending about said axis, a plurality of check valve means respectively associated with each conduit for permitting fluid flow from the associated conduit toward said manifold while impeding fluid flow from said manifold into the associated conduit, and a discharge conduit leading outward of said manifold, the improvement in each of said valve means which comprises:
  • said guide means including a plurality of guide pins circumferentially spaced in said manifold,
  • each valve plate slidably engaging respective ones of said guide pins.
  • said guide means further including a connecting member fixedly fastened to each of a plurality of said guide pins and offset from the valve plates engaging the fixedly fastened guide pins in a direction away from the orifices of the outlet conduits associated with the-engaging valve plates.
  • said manifold being approximately circularly arcuate about said axis
  • said connecting member being a flat ring of sheet material extending in said manifold in an arc about said axis.
  • said guide means guiding said valve plates for free movement between respective positions of abutting engagement with said connecting member and said respective positions of sealing engagement, each valve plate in said position of sealing engagement only one of said orifices.
  • a housing constituting said wall means, said cylinders, said outlet conduits, and said manifold, said outlet conduits extending from said orifices thereof inward of said housing in the direction of said axis, said housing being formed with axial bores open toward said manifold, said guide pins being partly received in said bores.
  • each guide pin being elongated and having respective first and second longitudinal portions, the firs portion being received in said manifold and being smaller in cross sectional area I than the second portion, said second portion being resecond portion.
  • each valve plate having an end face transverse to the direction of elongation thereof, said end face being formed with a longitudinally open notch receiving one of said guide pins.
  • said one guide pin being simultaneously received in said notches of two valve plates circumferentially offset from each other, said valve plates being arranged in end-to-end relationship in circular array about said axis.
  • each valve plate being formed with a passage therethrough in the direction of flow of fluid from the associated orifice. said passage being interposed circumferentially between said associated orifice and one of the guide pins engaged by said valve plate.
  • one of said longitudinally spaced portions of at least one of said valve plates being formed with a bore extending therethrough in the direction of fluid flow from the associated orifice, one of said guide pins being received in

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Check Valves (AREA)
US461713A 1973-04-17 1974-04-17 Multiple cylinder pump Expired - Lifetime US3885893A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2319307A DE2319307A1 (de) 1973-04-17 1973-04-17 Vormontierbares druckventil fuer pumpen mit mehr als einem arbeitsakt pro umdrehung, insbesondere fuer axial- und radialkolbenpumpen

Publications (1)

Publication Number Publication Date
US3885893A true US3885893A (en) 1975-05-27

Family

ID=5878331

Family Applications (1)

Application Number Title Priority Date Filing Date
US461713A Expired - Lifetime US3885893A (en) 1973-04-17 1974-04-17 Multiple cylinder pump

Country Status (6)

Country Link
US (1) US3885893A (enrdf_load_stackoverflow)
JP (1) JPS5030106A (enrdf_load_stackoverflow)
DE (1) DE2319307A1 (enrdf_load_stackoverflow)
FR (1) FR2226571B3 (enrdf_load_stackoverflow)
GB (1) GB1417933A (enrdf_load_stackoverflow)
IT (1) IT1009464B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363607A (en) * 1979-01-13 1982-12-14 Zahnradfabrik Friedrichshafen, Ag Radial piston pump
US4881877A (en) * 1986-03-07 1989-11-21 Zahnradfabrik Friedrichshafen, Ag. Radial piston pump
EP1203871A3 (en) * 2000-11-03 2003-01-15 Caterpillar Inc. Check valve for a prechamber assembly
EP1443209A3 (en) * 2003-01-16 2005-08-31 Interpump Engineering S.r.l. Water pump
CN102392811A (zh) * 2011-11-17 2012-03-28 阮坚毅 一种汽车充气泵

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3126917C2 (de) * 1981-07-08 1984-06-14 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Radialkolbenpumpe
JPH0746773Y2 (ja) * 1988-02-04 1995-10-25 カヤバ工業株式会社 ラジアルピストンポンプ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427253A (en) * 1943-09-21 1947-09-09 American Brake Shoe Co Epicyclic drive
US2821932A (en) * 1954-04-28 1958-02-04 Siam Fluid pumps or engines of the piston type
US3125034A (en) * 1964-03-17 Pump with radial cylinders

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125034A (en) * 1964-03-17 Pump with radial cylinders
US2427253A (en) * 1943-09-21 1947-09-09 American Brake Shoe Co Epicyclic drive
US2821932A (en) * 1954-04-28 1958-02-04 Siam Fluid pumps or engines of the piston type

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363607A (en) * 1979-01-13 1982-12-14 Zahnradfabrik Friedrichshafen, Ag Radial piston pump
US4881877A (en) * 1986-03-07 1989-11-21 Zahnradfabrik Friedrichshafen, Ag. Radial piston pump
EP1203871A3 (en) * 2000-11-03 2003-01-15 Caterpillar Inc. Check valve for a prechamber assembly
US6575192B1 (en) 2000-11-03 2003-06-10 Caterpillar Inc Check valve for a prechamber assembly
EP1443209A3 (en) * 2003-01-16 2005-08-31 Interpump Engineering S.r.l. Water pump
CN102392811A (zh) * 2011-11-17 2012-03-28 阮坚毅 一种汽车充气泵

Also Published As

Publication number Publication date
FR2226571A1 (enrdf_load_stackoverflow) 1974-11-15
GB1417933A (en) 1975-12-17
IT1009464B (it) 1976-12-10
JPS5030106A (enrdf_load_stackoverflow) 1975-03-26
DE2319307A1 (de) 1974-11-07
FR2226571B3 (enrdf_load_stackoverflow) 1977-03-04

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