US2463638A - Reciprocating pump or motor - Google Patents

Reciprocating pump or motor Download PDF

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Publication number
US2463638A
US2463638A US571248A US57124845A US2463638A US 2463638 A US2463638 A US 2463638A US 571248 A US571248 A US 571248A US 57124845 A US57124845 A US 57124845A US 2463638 A US2463638 A US 2463638A
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US
United States
Prior art keywords
pistons
slippers
eccentric
piston
part spherical
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
US571248A
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English (en)
Inventor
Naylor Joshua Challiner
Holden Warwick Claude
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.)
Vinters Armstrongs Ltd
Original Assignee
Vickers Armstrongs Ltd
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Filing date
Publication date
Application filed by Vickers Armstrongs Ltd filed Critical Vickers Armstrongs Ltd
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Publication of US2463638A publication Critical patent/US2463638A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/06—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders in star or fan arrangement
    • F01B1/0641—Details, component parts specially adapted for such machines
    • F01B1/0658—Arrangements for pressing or connecting the pistons against the actuating or actuated cam
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18264—Crank and multiple pitmans

Definitions

  • This invention relates to means for transmitting movement from an eccentric to pistons, e. g. as adapted in reciprocating pumps or motors hereinafter referred to as pumps for use in hydraulic services which include cylinders containing reciprocable pistons, the reciprocation of the pistons within the cylinders in the case of a pump resulting from rotational movements of a driving shaft and an associated eccentric in driving connection with the piston, the degree of eccentricity of the eccentric and effective stroke of the piston being either fixed or variable. Examples of such radial pumps are described and illustrated in the specifications and drawings accompanying copending patent application No. 505,491 filed October 8, 1942 which issued as Patent 2,404,175 July 16, 1946, and application No. 505,490 filed October 8, 1942.
  • the present invention consists broadly in engaging the appropriate ends of the pistons directly with the slippers so as to transmit the load strokes directly from the slippers to the pistons where the piston ends and slippers con-
  • a highly efficient and practical manner of achieving the foregoing direct driving contact between pistons and slippers is to form each slipper or other member with which the piston is to be associated with a part spheri-v cal seating for the reception of the inner end of the piston, the latter being similarly shaped so that the two parts make contact with each other during the load stroke without the interposition of a pin, the piston and slipper or like member being connected by means of a pin for the purpose of the return stroke only.
  • a self-aligning seating is provided for the piston, the slipper being free to move slightly under the force applied thereto and position itself about the piston ball end between this and the annular ring, thereby compensating for wear or for any inaccuracy in the construction of the component parts during manufacture, whilst furthermore by retaining a pin connection between the piston and its associated annular ring and/or slipper, the pin provides a positive means for eiiecting retraction or return movement of the piston, this being particularly desirable in the case of a pump operating at high speed.
  • Figure 1 is a diametrical section on the line A-B of Figure 2, showing the invention applied to one form of pump and in which there is combined with the part spherical piston ends, and correspondingly recessed slippers, piston pins with stepped or cut-away, ends to engage retaining rings,
  • Figure 2 being a section On the line C-D of Figure 1;
  • Figure 3 is a diametrical section through the cylinder block and eccentric in which the piston pins carry plain rollers to engage the retaining rings and in which the rollers engage retaining grooves in the slippers;
  • Figure 4 is a cross section through Figure 3; and , Figure 5 is a diametrical section through the cylinder block and eccentric of another form of pump and showing the piston pins carrying stepped rollers on reduced diameter ends.
  • the radial cylinders l accommodating the pistons 4 are formed in Se mental blocks 3 fixed in the pump casing la by studs 2.
  • the pistons make direct engagement in the segmental section slippers 8 by means of part spherical ends 6 seating and positioning. in correspondingly radiused parts spherical recesses 1 in the slippers, the slippers contacting concentrically with the outer ring 9' of the ec"- centric body I0, needle bearings" lz-being inter"- posed between the ring 9 and body i0.
  • Each piston is bored transversely for" there'-- ception of a diametrically disposed.
  • piston pin the axis of which intersects the centre of radius of the part spherical head of the piston, the ends of the pin which project from the piston being cut away for approximately half the pin diameter to provide stepped ends M having arcuate faces parallel with the pins axis, these arcuate-faces facing away from the eccentric and correspond-- ing in curvature with the internal radius of two I3 section retaining rings l3 which surround thev pins and serve to maintain the part spherical ends of the pistons in contact with'thei-r asso ciated seatings in the slipper, and the slippers i111 contact with-the annular ring 9 surrounding the" eccentric.
  • the reason for the retaining rings each being of L section is to obtain an'in-- wardly directed web on each ring, which webs by virtue of their rubbing engagement with the ends of the pins, serve to locate each pin-length-- Wise within its boring in its associated piston, the. outer faces of the retaining rings making light facial contact with opposed annular faces of two rings ll which serve to locate ball or rollerraces l5 and i6 in the casing-to support the shaft II.
  • the inner edges of the retainingrings thus serve to prevent movement of the pins 5 in a direction parallel with the axis of the pump driv-'- ing shaft II, it being understood that the partspherical ends of the pistons position the slippers.
  • each slipper 8 is again-formedwith a part spherical seating I for the reception of the corresponding part spherical end of the appropriate piston 4.
  • each piston is bored for the reception of a transversely arranged piston pin 5 as aforesaid; each pin is not reduced in diameter at its extremities, but each extremity carries a roller '20- retained in an arcuate section radiused groove 2
  • the retaining rings in.the:case ofb'reakage' of the pin serve to retain the rollers against outward movement, sideways movement of" the rollers being prevented by their engagement with the part circular grooves 2
  • the pins are reduced in diameter at their'extremities as at Sat, and carry rollers 20 which enter arcuate shaped recesses 22 formed in'the slippers 8, the rollers being also reduced in diameter as at 20a where they engage the retaining rings l3.
  • the pins are held against endwise movement by reason of the engagement of their annular shoulders with the rollers, and as in the preceding construction shown in Figures 3 and 4 the pins are free to rotate about their axes.
  • a radial cylinder type of pump or motor comprising a plurality of radial cylinders, pistonsin such cylinders and an eccentric adapted to produce relative reciprocation between the pistons and cylinders, a part spherical protuberance on the end of each piston remote from the end which operates within the appropriate cylinder; a plurality of" slippers slidable about the periphery of the eccentric, a seating in each slipper, said. seatings affording abutment surfaces for direct engagement with the part spherical ends of the pistons so that the pistons can oscillate relatively to the slippers and the load strokes are transmitted directly across the slippers and" pistons.
  • a radial cylinder type of pump or motor comprising a plurality of radialcylinders, pistons in such cylinders and an eccentric adapted to producerelative reciprocation between the pistons and'the cylinders,.a part spherical protuberance onthe vend of each piston remote from the end whichoperates within the appropriate cyIinder a plurality of slippers corresponding in numberand opposed. to the pistons and slidable about the. periphery of the eccentric, a seating in each slipper, said seatings receiving the part spherical'endsof the pistons directly for oscillation of. the pistons relatively to the slippers sov that the load strokes are transmitted directly across the slippers and pistons, and means between.
  • abutments disposed diametrically. with respect to. the part spherical ends of the pistons and a pair of retaining rings. disposedopposite sides of the eccentric and engaged Within their perimeters simultaneously by allot-said abutments.
  • a radial cylinder type of pump or motor comprising-a plurality of radial cylinders, pistons insuch cylinders and an eccentric adapted to produce relative reciprocation between pistons and cylinders, a part spherical protuberance on the end of each piston remote from the end which operates within the appropriate cylinder, a plurality of slippers slidable-ahout the periphery of the-eccentric, a part spherical seating in each" slipper, said seatings receiving the part 2,4es,ess
  • said means comprising pins passed through the part spherical ends of the pistons diametrically with respect to such part spherical ends and a pair of retaining rings disposed opposite sides of the eccentric and engaging all of said pins simultaneously by their inner peripheries.
  • Means for transmitting movement from an eccentric to a plurality of pistons disposed substantially radially with respect to the eccentric comprising slippers interposed between the periphery of said eccentric and the ends of the pistons opposed to the periphery of the eccentric, part spherical surfaces on said ends of the pistons, bearing directly against said slippers, and means common to all of the pistons maintaining their part spherical ends constantly in engagement with said slippers, said means comprising lateral projections on the pistons and members connected across said projections to operate as abutments against outward displacement of said projections relatively to the said slippers.
  • Means for transmitting movement from an eccentric to a plurality of pistons disposed substantially radially with respect to the eccentric comprising slippers interposed between the periphery of said eccentric and the ends of the pistons opposed to the periphery of the eccentric, part spherical surfaces comprising said ends of the pistons, and seatings in said slippers engaged directly by said part spherical ends, and means common to all of the pistons maintaining their part spherical ends constantly in engagement with said seatings, said means comprising a pair of lateral projections with each piston, such projections being disposed co-axially and diametrically with respect to the part spherical end of the appropriate piston, and a pair of retaining rings disposed opposite sides of the eccentric and overhanging and engaging simultaneously all of the said projections.
  • Means for transmitting movement from an eccentric to a plurality of pistons disposed substantially radially with respect to the eccentric comprising slippers interposed between the periphery of said eccentric and the ends of the pistons opposed to the periphery of the eccentric, part spherical surfaces comprising said ends of the pistons, and seating in said slippers engaged directly by said part spherical ends, and means common to all of the pistons maintaining their part spherical ends constantly in engagement with said seatings, said means comprising with each piston a pair of co-axial lateral projections disposed substantially diametrically with respect to the part spherical end of the appropriate piston, rollers carried by said projections, arcuate recesses in the slippers radiused to receive parts of the peripheries of said rollers, and a pair of retaining rings disposed on opposite sides of the eccentric, overhanging and engaging simultaneously all of the said rollers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)
US571248A 1943-10-27 1945-01-04 Reciprocating pump or motor Expired - Lifetime US2463638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17751/43A GB575319A (en) 1943-10-27 1943-10-27 Improvements in or relating to reciprocating pumps or motors

Publications (1)

Publication Number Publication Date
US2463638A true US2463638A (en) 1949-03-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
US571248A Expired - Lifetime US2463638A (en) 1943-10-27 1945-01-04 Reciprocating pump or motor

Country Status (4)

Country Link
US (1) US2463638A (fr)
ES (1) ES172638A1 (fr)
FR (1) FR926830A (fr)
GB (1) GB575319A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570372A (en) * 1968-11-29 1971-03-16 John F Campbell Radial pump with hydrostatic load balance
WO1999037916A1 (fr) * 1998-01-23 1999-07-29 Robert Bosch Gmbh Pompe a piston radial pour production de haute pression pour carburant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674949A (en) * 1954-04-13 jollig
NL9301011A (nl) * 1993-06-11 1995-01-02 Applied Power Inc Radiale-plunjerpomp.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1149728A (en) * 1912-08-14 1915-08-10 Esteban Ciarlo Mechanical movement.
US1796267A (en) * 1927-12-03 1931-03-10 Fry Equipment Corp Shock absorber
US2048524A (en) * 1931-07-03 1936-07-21 Ernest J Svenson Plunger pump
US2279645A (en) * 1939-05-12 1942-04-14 Alfred C Sinclair Pump
US2309551A (en) * 1939-11-03 1943-01-26 Automotive Prod Co Ltd Pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1149728A (en) * 1912-08-14 1915-08-10 Esteban Ciarlo Mechanical movement.
US1796267A (en) * 1927-12-03 1931-03-10 Fry Equipment Corp Shock absorber
US2048524A (en) * 1931-07-03 1936-07-21 Ernest J Svenson Plunger pump
US2279645A (en) * 1939-05-12 1942-04-14 Alfred C Sinclair Pump
US2309551A (en) * 1939-11-03 1943-01-26 Automotive Prod Co Ltd Pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570372A (en) * 1968-11-29 1971-03-16 John F Campbell Radial pump with hydrostatic load balance
WO1999037916A1 (fr) * 1998-01-23 1999-07-29 Robert Bosch Gmbh Pompe a piston radial pour production de haute pression pour carburant

Also Published As

Publication number Publication date
FR926830A (fr) 1947-10-13
ES172638A1 (es) 1946-03-16
GB575319A (en) 1946-02-13

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