US3183845A - Pump - Google Patents

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Publication number
US3183845A
US3183845A US228966A US22896662A US3183845A US 3183845 A US3183845 A US 3183845A US 228966 A US228966 A US 228966A US 22896662 A US22896662 A US 22896662A US 3183845 A US3183845 A US 3183845A
Authority
US
United States
Prior art keywords
cylinders
shaft
axis
fluid displacing
fluid
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
US228966A
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English (en)
Inventor
Tyler Henry Park
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.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Priority to US228966A priority Critical patent/US3183845A/en
Priority to ES0292305A priority patent/ES292305A1/es
Application granted granted Critical
Publication of US3183845A publication Critical patent/US3183845A/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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate

Definitions

  • the present invention relates to a dual rotor pump and more particularly to a pump providing a pulse free flow.
  • Still another object of this invention is to provide a dual rotor pump having means of indexing the relationship of the cylinders of one rotor to the cylinders of the other.
  • FIGURE 1 is a view of my pump with the housing broken and sectioned to show the inner details of a dual rotor pump according to my invention.
  • FIGURE 2 is a sectional plan view of the pump taken along line 2-2 of FIGURE 1;
  • FIGURE 3 is a graphical plot of pulse pressure vs. time of a pump designed in accordance with my invention.
  • FIGURE 1 I show a. pump housing bearingly supporting a pair of rotors 12 and 14, as by bearings 16 and18 and shaft 20. Between the rotors I have placed a common cam means 22 supported by bearings 24 and 26 within respective bearing blocks 28 and 30. Thus, the cam means is stationary except for pivoting motion about a vertical axis 32 as explained hereinafter.
  • a pair of port plates 34 are arranged between the rotors 12 and 14 and the housing 10 and are held by locating pins 36.
  • These port plates are of a common variety heretofore utilized in axial pumps having a kidney shaped discharge passage 38 and a kidney shaped inlet passage 39.
  • the discharge passages may be in the form of a plurality of drilled passages preceded by a pressure transition series of holds (not shown).
  • ferrules 40 which are biased by a spring 42 towards the port plate 34. These ferrules may be termed leakage control ferrules, and they eliminate elfects of bearing alignment changes due to temperature and pressure changes during pump operation.
  • the rotors 12 and 14 are shown in block form for simplicity with two plungers 44 each operatively mounted therewith.
  • the plungers 44 are connected to cam following shoes 46 by a ball socket type joint, as seen sectioned in FIGURE 2.
  • the shoes 46 are in turn held against the surface of cam or swash plate 22 by auxiliary cam plates 48 which is biased into its holding position by springs 50 acting through spring retainers 52 and thrust bearings 54.
  • the thrust bearings 54 serve as pivot bearings for the auxiliary cam plates 48 and are splined so as to be driven by the shaft 20 having appropriately matching splines 56.
  • the housing is preferably of a two part construction that is bolted together, as by bolts 70, and are appropriately formed with an inlet port 72, FIGURE 1, and an outlet port 74, FIGURE 2.
  • the inlet and outlet ports are commonly communicated to the inlet and outlet passages by way of respective passages through the housing, one of which, a pump discharge passage 76, is shown in FIGURE 2.
  • the inlet passage 78 does not appear as clearly in the sections taken to illustrate my invention. However, anyone skilled in the art would be assumed to know how one may connect respective ports of two pumps to provide a common inlet and discharge.
  • a simple ferrule type seal 80 is provided to seal the passages where the casing ports are joined.
  • the rotors 12 and 14 are preferably constructed to have an equal number of cylinders 82 having a sleeve 84 of wear resistant material inserted therein along which pistons 44 sealingly reciprocate.
  • the rotors 12 and 14 are splined so as to mate with the splines 56 of shaft 20 to be driven thereby.
  • I have provided a shaft with 16 splines and the rotor with 16, such that when starting from a nearly vertical spline, the third spline axis makes a angle with respect to the vertical spline axis.
  • the cam or swash plate as it may be termed is provided with a projection 92 to which a spring 94 is adapted to urge the swash plate to pivot on bearings 24 and 26 to a position where the pump delivers a maximum pressure or quantity flow.
  • I provide a simple servometer 96 which is connected to a control by a port 98, or internally by a passage (not shown).
  • This control may be a simple valve mechanism subjected to inlet and/or case pressure on one side and discharge pressure on the other to cause a flow of fluid to the servomotor 96 whenever discharge pressure is high enough to unseat the valve. This would then assist a spring 100 in overcoming spring 94 to move the cam plate 22 clockwise, as viewed in FIGURE 2, lowering delivery pressure.
  • a fluid pressurizing apparatus comprising:
  • a first fluid displacing unit having a central opening adapted to receive the splines of said shaft, said first fluid displacing unit having a plurality of first fluid displacing members which members are equidistantly positioned, said first fluid displacing members including a plurality of first cylinders and located on said shaft so that an axis of one of the cylinders and an axis of a spline of the shaft are so arranged to be in the same radial plane and substantially-parallel;
  • a second fluid displacing unit having a central opening adapted to receive the splines of said shaft, said second fluid displacing unit having a plurality of equidistantly spaced second fluid displacing members in-. cluding a plurality of second cylinders with an axis of one of the second cylinders angularly displaced from the axes of said spline which is in the same radial plane as the cylinder of said first cylinders with said axis of said one of said second cylinders substantially parallel to the axis of said first cylinders of said first fluid displacing unit and the splines of said shaft; and
  • a fluid pressurizing apparatus in accordance with claim 1 and further comprising:
  • control means for commonly actuating said first and second fluid displacement means of said first and second fluid displacing units including,
  • cam means centrally disposed between said first and second fluid displacing units, said cam means being pivotally mounted to said housing, and
  • a servomotor operatively connected to said cam means to move said cam means about said pivotal connection With said housing to adjust the amount of stroke imparted to said first and second fluid displacing members as said first and second fluid displacing units are rotated by said shaft which servomotor and cam means cooperate to simultaneously regulate the stroke to be equal in said first fluid displacing unit and said second fluid displacing unit.
  • a fluid pressurizing apparatus comprising:
  • a first rotor adapted to be driven by said shaft, said first rotor including a plurality of equispaced cylinders with fluid pressurizing reciprocating members therein, said first rotor being arranged to have an axis of one of said cylinders and an axis of one of the splines so arranged to be in the same radial plane and substantially parallel;
  • a second rotor adapted to be driven by said shaft, said second rotor including a plurality of equispaced cylinders with fluid pressurizing reciprocating members therein, said second rotor being arranged to have an axis of one of said cylinders of said second rotor and said axis of said spline which is in the same radial plane as one cylinder of said first rotor are so arranged to be in a different radial plane and substantially parallel;
  • a nonrotatable control means operatively connected with said reciprocating members of both said first and second rotors to equalize magnitude of delivery of said rotors;
  • a pressure responsive means operatively connected to said control means to vary said magnitude

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
US228966A 1962-10-08 1962-10-08 Pump Expired - Lifetime US3183845A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US228966A US3183845A (en) 1962-10-08 1962-10-08 Pump
ES0292305A ES292305A1 (es) 1962-10-08 1963-10-08 Perfeccionamientos en bombas hidraulicas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US228966A US3183845A (en) 1962-10-08 1962-10-08 Pump

Publications (1)

Publication Number Publication Date
US3183845A true US3183845A (en) 1965-05-18

Family

ID=22859284

Family Applications (1)

Application Number Title Priority Date Filing Date
US228966A Expired - Lifetime US3183845A (en) 1962-10-08 1962-10-08 Pump

Country Status (2)

Country Link
US (1) US3183845A (es)
ES (1) ES292305A1 (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306209A (en) * 1964-03-26 1967-02-28 Bendix Corp Pump
US4500261A (en) * 1982-04-07 1985-02-19 Ab Asea-Atom Pump means for pumping a mixture of coarse-grained material and fluid
US4729717A (en) * 1986-12-24 1988-03-08 Vickers, Incorporated Power transmission
US5022310A (en) * 1989-03-07 1991-06-11 Stewart Robert M Fluid power transmission
US20130205987A1 (en) * 2010-07-08 2013-08-15 Robert Bosch Gmbh Hydraulic Axial Piston Machine
WO2022156967A1 (en) * 2021-01-22 2022-07-28 Danfoss Power Solutions Gmbh & Co. Ohg Axial piston machine with swivel element actuated by a servo unit for adjusting the displacement volume

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639673A (en) * 1945-04-13 1953-05-26 Electro Hydraulics Ltd Pump or motor
US2858767A (en) * 1955-10-13 1958-11-04 Neil V Smith Pumping apparatus
US2910008A (en) * 1954-12-23 1959-10-27 Bendix Aviat Corp Pump
US3022738A (en) * 1959-04-20 1962-02-27 Krute Everett Archie Pump systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639673A (en) * 1945-04-13 1953-05-26 Electro Hydraulics Ltd Pump or motor
US2910008A (en) * 1954-12-23 1959-10-27 Bendix Aviat Corp Pump
US2858767A (en) * 1955-10-13 1958-11-04 Neil V Smith Pumping apparatus
US3022738A (en) * 1959-04-20 1962-02-27 Krute Everett Archie Pump systems

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306209A (en) * 1964-03-26 1967-02-28 Bendix Corp Pump
US4500261A (en) * 1982-04-07 1985-02-19 Ab Asea-Atom Pump means for pumping a mixture of coarse-grained material and fluid
US4729717A (en) * 1986-12-24 1988-03-08 Vickers, Incorporated Power transmission
US5022310A (en) * 1989-03-07 1991-06-11 Stewart Robert M Fluid power transmission
US20130205987A1 (en) * 2010-07-08 2013-08-15 Robert Bosch Gmbh Hydraulic Axial Piston Machine
US9920751B2 (en) * 2010-07-08 2018-03-20 Robert Bosch Gmbh Hydraulic axial piston machine
WO2022156967A1 (en) * 2021-01-22 2022-07-28 Danfoss Power Solutions Gmbh & Co. Ohg Axial piston machine with swivel element actuated by a servo unit for adjusting the displacement volume

Also Published As

Publication number Publication date
ES292305A1 (es) 1964-01-01

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