US3796517A - Device for feeding pressurized fluid - Google Patents

Device for feeding pressurized fluid Download PDF

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Publication number
US3796517A
US3796517A US00277534A US3796517DA US3796517A US 3796517 A US3796517 A US 3796517A US 00277534 A US00277534 A US 00277534A US 3796517D A US3796517D A US 3796517DA US 3796517 A US3796517 A US 3796517A
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US
United States
Prior art keywords
pumps
delivery conduit
group
conduit
distributor
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
US00277534A
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English (en)
Inventor
P Praddaude
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.)
Poclain SA
Original Assignee
Poclain SA
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 Poclain SA filed Critical Poclain SA
Application granted granted Critical
Publication of US3796517A publication Critical patent/US3796517A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/25—Pressure control functions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/65—Methods of control of the load sensing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Definitions

  • F04b 23/04 group ofPump-t is of the Constant discharge type the 58 Field Of Search 417/216, 426, 427; 60/421, secottd group of Pumps Comprises a Single delivery 6O/427 conduit and the first delivery conduit of the first group of pumps and single delivery conduit of the second [56] References Cited group of pumps are connected to the first supply cir- UNITED STATES PATENTS cuit, while the second delivery conduit of the first group of pumps is connected to the second supply cir- 2 O98,425 l l/l937 Lautenberger 60/427 Quit 2,646,755 7/l953 Joy 9l/497 2,979,908 4/1961 Shook.- 60/421 3 Claims, 2 Drawing Figures DEVICE FOR FEEDING PRESSURIZED FLUID The present invention relates to a pressurized fluid feed device. I
  • Prior art device such as described in the U. S. Pat. No. 3,635,600, enables a very advantageous functioning to be obtained.
  • the regulation of power of two groupsof pumps leads to the possibility, shown at the time, of using pumps with limited power, despite the existence of circuits that may receive high powers.
  • the present invention is advantageous as it permits a satisfactory feed of pressurized fluid to particular receiving members having such functions that, in order to carry them out, it is often preferable, if not indispensable, for said receiving members to be fed at constant discharge.
  • the invention therefore has for its object to provide a device for feeding pressurized fluid to at least two supply circuits via two groups of pumps wherein the first group is of the variable discharge type with two distinct delivery conduits, while a power regulator of the pressure summation type is coupled with the member controlling the discharges of the said first groups of pumps.
  • the second group of pumps contains a single delivery conduit. Thefirst delivery conduit of the first group of pumps and the single delivery conduit of the second group of pumps are connected to the first supply circuit, and the second delivery conduit of the first group of pumps are connected to the second supply circuit.
  • the second group of pumps is with constant discharge, while a receiving device is disposed on the single delivery conduit of said second group of pumps.
  • the receiving device is interposed on the single delivery conduit between the connections of said single conduit on the one hand to the secondgroup of pumps while on the other hand to the first'delivery conduit of the first group of pumps.
  • a distributor is advantageously disposed on the first delivery conduit of the first groups of pumps and ensures at least the communicationof the first delivery conduit of the'first group of pumps selectively with the first supply circuit, and with a third supply circuit.
  • the receiving device is disposed on the single delivery conduit beyond the connection of the first delivery conduit of the first group of pumps with said single delivery conduit.
  • the receiving member has a function for which, in order to carry it out, it must be supplied with pressurized fluid at a constant discharge.
  • FIG. 1 schematically shows a first embodiment of a feed device according to the invention.
  • FIG. 2 schematically shows a second embodiment of the feed device according to the invention.
  • FIGS. 1 and 2 show a first group of two variable discharge pumps 1 and 2, which are grouped in an integral assembly 4.
  • the pumps 1, 2 may moreover have an equivalent in a single pump which would be constituted by the connection of the pumps 1 and 2 in one casing.
  • the members 6 and 7 which control the discharges are connected by an articulated connection 8. l
  • the pumps 1, 2 and a constant discharge pump 26 are provided with their delivery conduits respectively as shown in FIG. 1 at 9, 10a-10b and 11a-l lb, and in FIG. 2 at 9, 10a-10b and 11.
  • a two-way distributor 27 is interposed between the parts and 10b of the conduit 10a-10b.
  • a receiving member 28 is also interposed between the parts 11a and 11b of conduit lla-l 1b.
  • Pipes 12 and 13 are connected to conduits 9 and 10a, such as by welding, and connect said conduits 9 and 10a to a power regulator 15 with pressure summation.
  • the power regulator 15 is a member which, as a function of the pressures of the fluid in the delivery conduits 9 and 10a transmitted via the pipes 12 and 13, acts on the link 8 for controlling the discharge of the pumps 1 and 2.
  • This regulator 15 limits the: power delivered to the supply circuit to a determined value.
  • the power regulator 15 may be of the pressure summation type such as disclosed in said US. Pat. No. 3,635,600. It is the sum of the actions of the pressures prevailing in the delivery conduits 9 and 10a which acts on the articulated link 8, thus on the members 6 and 7 for controlling the discharges of pumps 1 and 2.
  • the delivery conduit 9 is connected to a supply circuit, of which the inlet conduit 20 has been shown for example as a thimble or clamp 21.
  • Conduit 10b connects the distributor 27 to the connecting thimble or clamp 23 which ensures the branching of the conduit 11b of FIG. 1 or of the conduit 11 of FIG. 2 with said conduit 10b and with a so-called first supply circuit as shown by conduit 25.
  • the conduit 20 reprebers 28 and 29 are often members that have to be fed at a constant discharge, for example jacks.
  • the member 28 may be a jack controlling the steering members of a public works machine.
  • the member 29 may be one or more jacks used for maneuvering the operating equipment (jib beam-bucket) of a public works machine.
  • the operating equipment jib beam-bucket
  • circuits and/or 24 may be the hydraulic circuits feeding the translation motors of the corresponding public works machine.
  • the advantage of having provided a feed capable of connecting the delivery conduits of three pumps 1, 2, 26 to the two supply circuits 20 and 25, associated with the existence of the regulator 15, resides essentially in the possibility of selectively choosing for pumps 1, 2 and 26, for example, all of the power equal to a given power, said given power being relatively moderate.
  • pump 26 is chosen as having constant discharge, and while retaining practically the same advantage as in the prior known circuits, which resides in the possibility of obtaining an available power of the fluid conveyed in the conduit 25 greater than that discharged by the single pump 26, the member 28, which is constituted by a jack, may in addition be satisfactorily fed.
  • a receiving member 29 may also be disposed on the conduit 25 downstream of the thimble or clamp 23 with respect to the pump 26.
  • the member 29 may be fed either solely by pump 26, when the distributor 27 is disposed in its second position, or by pumps 26 and 2, when the distributor 27 is disposed in its first position.
  • the member 29 on the conduit 25 it is necessary to provide the distributor 27 in order to be able effectively feed said member 29 only with the single pump 26, in the operational phases during which said member 29 must be controlled with precision. This is particularly the case where the member 29 constitutes a jack or jacks for maneuvering the operating equipment of the machine.
  • the preferred applications of the feed device which has just been described reside in the concomitant feeds of receiving members, some under possibly variable discharges, the others under substantially constant discharges. It remains that, even for the feed of receiving members under any discharges, which are not necessarily constant, the application of the new device avoids having to choose a pump which would be of variable discharge, and having to control said pump by a power regulator. A considerable saving is therefore made.
  • variable discharge pumps each of said pumps having a single delivery conduit, and means associated with said variable discharge pumps and controlling the discharge of said pumps through their respective delivery conduits;
  • a power regulator of the pressure summation type operatively coupled to said means, said power regulator being directly connected to each of said respective delivery conduits;
  • said second supply circuit being connected to said delivery conduit of a one of said at least variable discharge pumps
  • a distributor connected between said delivery conduit of another of said at least one variable discharge pumps and said first and third supply circuits respectively, said distributor having at least two positions whereby said delivery'conduit of another of said pumps is alternately connected to said first and said third circuits respectively;
  • a receiving device connected between said single delivery conduit of said constant discharge pump and said first circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Power Steering Mechanism (AREA)
US00277534A 1971-08-06 1972-08-03 Device for feeding pressurized fluid Expired - Lifetime US3796517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7128969A FR2148331B2 (enrdf_load_stackoverflow) 1971-08-06 1971-08-06

Publications (1)

Publication Number Publication Date
US3796517A true US3796517A (en) 1974-03-12

Family

ID=9081593

Family Applications (1)

Application Number Title Priority Date Filing Date
US00277534A Expired - Lifetime US3796517A (en) 1971-08-06 1972-08-03 Device for feeding pressurized fluid

Country Status (4)

Country Link
US (1) US3796517A (enrdf_load_stackoverflow)
FR (1) FR2148331B2 (enrdf_load_stackoverflow)
GB (1) GB1347795A (enrdf_load_stackoverflow)
IT (1) IT996543B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158529A (en) * 1975-02-12 1979-06-19 Robert Bosch Gmbh Control device for a pumping arrangement
FR2627813A1 (fr) * 1988-02-20 1989-09-01 Gullick Dobson Ltd Groupe generateur d'energie hydraulique
US20180142710A1 (en) * 2014-09-19 2018-05-24 Voith Patent Gmbh Hydraulic drive with rapid stroke and load stroke

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2098425A (en) * 1935-03-26 1937-11-09 American Eng Co Ltd Control mechanism for pumps
US2646755A (en) * 1947-01-21 1953-07-28 Joy Mfg Co Hydraulic mechanism
US2979908A (en) * 1960-01-04 1961-04-18 Warner Swasey Co Hydraulic control systems
US3535877A (en) * 1969-05-09 1970-10-27 Gen Signal Corp Three-pump hydraulic system incorporating an unloader
US3543516A (en) * 1969-05-19 1970-12-01 Deere & Co Automatically shiftable direction control valve
US3720059A (en) * 1969-10-15 1973-03-13 Linde Ag Hydraulic system and valve therefor
US3723026A (en) * 1970-04-22 1973-03-27 I Soyland Effect regulator for constant and variable volume-flow pumps

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2098425A (en) * 1935-03-26 1937-11-09 American Eng Co Ltd Control mechanism for pumps
US2646755A (en) * 1947-01-21 1953-07-28 Joy Mfg Co Hydraulic mechanism
US2979908A (en) * 1960-01-04 1961-04-18 Warner Swasey Co Hydraulic control systems
US3535877A (en) * 1969-05-09 1970-10-27 Gen Signal Corp Three-pump hydraulic system incorporating an unloader
US3543516A (en) * 1969-05-19 1970-12-01 Deere & Co Automatically shiftable direction control valve
US3720059A (en) * 1969-10-15 1973-03-13 Linde Ag Hydraulic system and valve therefor
US3723026A (en) * 1970-04-22 1973-03-27 I Soyland Effect regulator for constant and variable volume-flow pumps

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158529A (en) * 1975-02-12 1979-06-19 Robert Bosch Gmbh Control device for a pumping arrangement
FR2627813A1 (fr) * 1988-02-20 1989-09-01 Gullick Dobson Ltd Groupe generateur d'energie hydraulique
US4941807A (en) * 1988-02-20 1990-07-17 Gullick Dobson Limited Hydraulic power generating pack
US20180142710A1 (en) * 2014-09-19 2018-05-24 Voith Patent Gmbh Hydraulic drive with rapid stroke and load stroke
US10718357B2 (en) * 2014-09-19 2020-07-21 Voith Patent Gmbh Hydraulic drive with rapid stroke and load stroke

Also Published As

Publication number Publication date
FR2148331B2 (enrdf_load_stackoverflow) 1974-03-29
GB1347795A (en) 1974-02-27
IT996543B (it) 1975-12-10
FR2148331A2 (enrdf_load_stackoverflow) 1973-03-23

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