US3635600A - Device for feeding pressurized fluid - Google Patents

Device for feeding pressurized fluid Download PDF

Info

Publication number
US3635600A
US3635600A US14067A US3635600DA US3635600A US 3635600 A US3635600 A US 3635600A US 14067 A US14067 A US 14067A US 3635600D A US3635600D A US 3635600DA US 3635600 A US3635600 A US 3635600A
Authority
US
United States
Prior art keywords
pumps
group
delivery conduit
conduit
supply circuit
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
US14067A
Other languages
English (en)
Inventor
Pierre A 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 US3635600A publication Critical patent/US3635600A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00

Definitions

  • This invention relates to a device for feeding pressurized fluid to at least two supply circuits by two groups of variable discharge pumps, the first group of pumps comprising two distinct delivery conduits and a first power regulator being coupled with the member for controlling the discharges of said first group of pumps, while a second power regulator is coupled with the member for controlling the discharge of the second group of pumps, wherein the first power regulator is of the pressure simmation type, the second group of pumps comprises a single delivery conduit and the first 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, while the second delivery conduit of the first group of pumps is connected to the second supply circuit.
  • the present invention relates to a device for feeding pressurized fluid.
  • pressurized fluids means that a supply circuit is fed by a pump or a group of pumps.
  • One means of regulating the operation consists in selecting a variable discharge pump and in checking the fluid discharge as a function of the delivery pressure by a regulation member, hereinafter designated simply as "regulator.
  • a regulation member hereinafter designated simply as "regulator.
  • regulation is advantageously ensured by a con stant power regulator.
  • one pump or a group of pumps with two discharges may, as is well known, be selected.
  • a constant power regulator limits the total power called upon by the two supply circuits and is for example of the pressure summation type.
  • the applicants have had the idea of providing, in the case of at least two supply circuits, that the power not demanded by one of the circuits be directed to the second circuit for feeding same. To this end, they have designed an original supply device which specifically forms the object of the present application.
  • the invention therefore has for its object a device for feeding pressurized fluid to at least two supply circuits by two groups of variable discharge pumps, the first group of pumps comprising two distinct delivery conduits and a first power regulator being coupled with the member controlling the discharge of said first group of pumps, while a second power regulator is coupled with the member controlling the discharge of the second group of pumps.
  • the first power regulator is of the pressure summation type and the second group of pumps comprises a single delivery conduit.
  • the first 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, while the second delivery conduit of the first group of pumps is connected to the second supply circuit.
  • the first delivery conduit of the first group of pumps and the single delivery conduit of the second group of pumps are advantageously connected to the first supply circuit by a single connection.
  • a selector may be arranged on the first delivery conduit of the first group of pumps in order to ensure at least the communications of the first delivery conduit of the first group of pumps selectively with the first supply circuit, and with a third supply circuit.
  • the first group of pumps is constituted, for example, by a single pump with two discharges, or even by two separate pumps.
  • FIG. I is a view, with part section, of a device according to the invention.
  • FIGS. 2 and 3 are schematic partial views of the device shown in FIG. 1.
  • FIG. I shows three variable discharge pumps l, 2 and 3. These pumps have their suction members connected for example to a hydraulic oil tank; they are not shown in the drawing, as this detail is known per se.
  • Two of these pumps I and 2 are grouped into an integral assembly 4 which may moreover have an equivalent in a single pump which would be constituted by joining the pumps I and 2 in a single casing 5.
  • the members 6 and 7 for controlling the discharges are connected by an articulated tie connection 8.
  • the pumps 1, 2 and 3 are moreover provided with their respective delivery conduits 9, 10 and I1.
  • Pipes I2, 13 and 14 are branched onto conduits 9, 10 and 11, for example by welding, and connect said conduits l2 and 13 to a power regulator 15 with pressure summation, and conduit I4 to a power regulatdr l6.
  • a power regulator such as 16 is a member which, as a function of the pressure of the fiuid in the delivery conduit 11 transmitted through the pipe 14, acts by its rod l7 on the member 18 for controlling the discharge of the pump 3.
  • This regulator limits the power delivered to the supply circuit to a predetermined value.
  • a power regulator such as 15, of the pressure summation type it is the sum of the actions of the pressures prevailing in the delivery conduits 9 and 10, said pressures being transmitted by the fluids in the pipes 12 and 13, which acts on the rod 19 of the regulator 15, which in turn acts on the articulated tie connection 8, thus on the members 6 and 7 controlling the discharges of pumps 1 and 2.
  • the regulator 15 is the intermediary element which makes it possible to modify the position of control members 6 and 7 of the pumps in such a way that the absorbed power remains constant. It is understood that, everything being equal, an increase in the delivery pressure of one of the pumps corresponds to a decrease in the flow and vice versa. Thus, when the pressure rises in one of the delivery conduits 9 or 10, the action on regulator 15 contributes to the pushing back of rod 19 and therefore to the movement of control members 6 and 7 of the variable flow pumps 1 and 2.
  • Regulator l6 acts in the same manner as regulator 15 but only with regards to the control of the pump 3.
  • the delivery conduit 9 is connected to a supply circuit, of which the inlet conduit 20 has been shown by a thimble 2I for example.
  • the conduit 10 is connected to one of the channels 220 of a three-way selector 22, and extends so as to connect a second channel 22b of the selector 22 to a connecting thimble 23 having three apertures.
  • On the third channel 220 of the selector 22 is connected a third circuit shown by its inlet conduit 24. If the supply circuit, to which conduit 20 belongs, is called the second circuit, the first circuit, shown by its inlet conduit 25, is connected to the thimble 23. Finally, the delivery conduit 11 of the pump 3 is connected to the final aperture of the thimble 23.
  • FIGS. 2 and 3 schematically show two positions of the three-way selector 22.
  • the selector communicates the two parts of conduit 10, isolating conduit 24 from the third supply circuit at 22c.
  • the selector communicates the first part of the conduit 10 with conduit 24, and isolates the second part of conduit 10 from the first part of the same conduit substantially at 2212.
  • selector 22 is arranged as shown in FIG. 2 will firstly be examined. This configuration comes back to feeding the two supply circuits corresponding to the inlet conduits 20 and 28 by the groups of pumps, the third circuit (conduit 24) being isolated and not fed-
  • the power delivered through pump 1 is absorbed by the second circuit (conduit 20), while the powers delivered by the pumps 2 and 3 are absorbed by the first circuit (conduit 28), conduits I0 and 11, connected to the thimble 23, being in communication with conduit 25.
  • the total power of the two groups of pumps remains of course, limited to the sum of the two limiting values defined by the regulators l5 and 1.
  • the power of each of pumps 1, 2 and 3 is equal to 60 horsepower (hp.
  • the first supply circuit (conduit 25) may call upon a power of I hp., the second circuit (conduit 20) obviously consuming nothing.
  • the first supply circuit (conduit 25), permanently fed by the pump 3 is thus complementarily fed by pump 2 with a discharge and at a pressure which correspond to the total power of pumps 1 and 2.
  • a conventional separate configuration with two supply circuits each fed by a pump, or by a group of pumps, if it was desired to continue to have the possibility of calling upon 60 and I80 hp. by the two supply circuits, it would in fact have been necessary to have separate pumps with powers of 60 and 180 hp.
  • the new arrangement enables pumps of lower power to be used for the same service. 5.
  • the selector 22 when the selector 22 is arranged as in FIG. 3, it is possible to supply three circuits, this obviously not being possible when there are only two separate pumps without a special device for distributing the discharge towards the supply circuits.
  • the first supply circuit (conduit 25) is fed solely by pump 3, the power supplied by said pump 3 being limited by the regulator 16.
  • the second circuit (conduit and the third circuit (conduit 24) are fed respectively by pumps l and 2 in a certain discharge ratio, adjustable by defining the regulator 15, the total power supplied by pumps 1 and 2 being limited by the regulator 15. There are therefore three independent supply circuits which it is possible to feed through the three pumps 1, 2 and 3.
  • the three-way selector 22 in the embodiment shown may or may not be installed, and the operation corresponding to the configuration of FIG. 2 is obtained, or there may be more than three channels, and a fourth channel, for example, may direct the delivered fluid through pump 2 through the conduit 10 towards the conduit 20, or towards another supply. This latter configuration is naturally in accordance with the invention. Finally, if the selector 22,
  • a fluid control system for feeding pressurized fluid to at least two supply circuits comprising a first group of variable discharge pumps having two distinct delivery conduits; a first power regulator means with pressure summation; means for controlling the discharges of said first group of pumps coupled with said first power regulator; a second group of variable discharge pumps having a delivery conduit; a second power regulator means and means for controlling the discharge of said second group of pumps coupled with said second power regulator means; and the delivery conduit of said second group of pumps and the first delivery conduit of said first group of pumps are connected to the first supply circuit and the second delivery conduit of said first group of pumps is connected to the second supply circuit.
  • the system of claim 1 including selector means arranged on the first delivery conduit of said first group of pumps whereby the first delivery conduit of said first group of pumps is in selective communication with the first supply circuit and a third supply circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
US14067A 1969-03-07 1970-02-25 Device for feeding pressurized fluid Expired - Lifetime US3635600A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6906559A FR2038454A5 (enrdf_load_stackoverflow) 1969-03-07 1969-03-07

Publications (1)

Publication Number Publication Date
US3635600A true US3635600A (en) 1972-01-18

Family

ID=9030339

Family Applications (1)

Application Number Title Priority Date Filing Date
US14067A Expired - Lifetime US3635600A (en) 1969-03-07 1970-02-25 Device for feeding pressurized fluid

Country Status (5)

Country Link
US (1) US3635600A (enrdf_load_stackoverflow)
DE (1) DE2010902A1 (enrdf_load_stackoverflow)
ES (1) ES377160A1 (enrdf_load_stackoverflow)
FR (1) FR2038454A5 (enrdf_load_stackoverflow)
GB (1) GB1266808A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117060A (en) * 1982-03-18 1983-10-05 Donkin And Company Limited Hydraulically operated apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282597A (en) * 1938-09-02 1942-05-12 Nat Supply Co Well drilling plant
US3496960A (en) * 1967-11-30 1970-02-24 Ingersoll Rand Co Automatic volumetric fluid control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282597A (en) * 1938-09-02 1942-05-12 Nat Supply Co Well drilling plant
US3496960A (en) * 1967-11-30 1970-02-24 Ingersoll Rand Co Automatic volumetric fluid control system

Also Published As

Publication number Publication date
DE2010902A1 (de) 1970-09-24
FR2038454A5 (enrdf_load_stackoverflow) 1971-01-08
ES377160A1 (es) 1972-06-01
GB1266808A (enrdf_load_stackoverflow) 1972-03-15

Similar Documents

Publication Publication Date Title
EP0044065B1 (en) Load sensing hydraulic system
US3987622A (en) Load controlled fluid system having parallel work elements
KR102023686B1 (ko) 압력 보상 유닛
US3695783A (en) Means for regulating power for pumps
US3478647A (en) Circuit for hydraulically operable devices,especially hydraulic dredges
US2331026A (en) Power transmission
US3635600A (en) Device for feeding pressurized fluid
US3385312A (en) Fluid regulator circuit
US4080994A (en) Control arrangement for supplying pressure fluid to at least two hydraulically operated consumer devices
GB2125903A (en) Hydraulic control distribution unit especially for public works equipment
GB2090917A (en) Hydraulic pump interlock system
US3150685A (en) Hydraulic control with mechanically vented pump unloading means
SU1716967A3 (ru) Гидравлическое устройство с регулируемым насосом
CN213143188U (zh) 快换管路控制系统及挖掘机
GB2317651A (en) Hydraulic systems
KR102273327B1 (ko) 다목적용 유압시스템의 펌프 유량 제어를 위한 유압회로
CN109611401B (zh) 一种过载补油阀
RU2320902C2 (ru) Секционный гидрораспределитель с механическим ручным управлением и рабочая секция секционного гидрораспределителя с механическим ручным управлением
CN218294019U (zh) 一种小型挖机泵功率调节用阀组件
KR0166116B1 (ko) 건설중장비의 대용량 압력감지형 언로딩시스템
SU1572902A1 (ru) Гидравлическое двухступенчатое устройство управлени сервомотором транспортного средства
KR100225979B1 (ko) 2 조의 유압회로계통을 갖춘 유압기기의 내부합류장치
RU2320903C1 (ru) Секционный гидрораспределитель с механическим ручным управлением и рабочая секция секционного гидрораспределителя с механическим ручным управлением
RU1810616C (ru) Гидросистема землеройно-транспортной машины
PL175881B1 (pl) Hydrauliczny mechanizm kierowniczy z sygnałem obciążenia