US3601506A - Wear equalized fuel delivery system - Google Patents

Wear equalized fuel delivery system

Info

Publication number
US3601506A
US3601506A US880648A US3601506DA US3601506A US 3601506 A US3601506 A US 3601506A US 880648 A US880648 A US 880648A US 3601506D A US3601506D A US 3601506DA US 3601506 A US3601506 A US 3601506A
Authority
US
United States
Prior art keywords
piston
inlet
conduits
discharge
pumps
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
US880648A
Inventor
Ray Frederick Griswold
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.)
Colt Industries Operating Corp
Colt Industries Inc
Original Assignee
Chandler Evans Inc
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 Chandler Evans Inc filed Critical Chandler Evans Inc
Application granted granted Critical
Publication of US3601506A publication Critical patent/US3601506A/en
Assigned to COLT INDUSTRIES INC., A PA CORP. reassignment COLT INDUSTRIES INC., A PA CORP. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 10/28/1986 PENNSYLVANIA Assignors: CENTRAL MOLONEY INC., A DE CORP., COLT INDUSTRIES OPERATING CORP., A DE CORP.
Assigned to COLT INDUSTRIES OPERATING CORPORATION, A CORP. OF DE reassignment COLT INDUSTRIES OPERATING CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 10/24/1986 DELAWARE Assignors: CHANDLER EVANS INC., A DE CORP., HOLLEY BOWLING GREEN INC., A DE CORP., LEWIS ENGINEERING COMPANY, THE, A CT CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/02—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for several machines or pumps connected in series or in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

A multipump fluid delivery system that simultaneously provides pump redundancy and the large displacement necessary at low startup speeds. Valve means are provided to cause one or more pumps to recirculate unpressurized fuel during normal operation when the entire flow of the several pumps need not be pressurized to meet system demands. The valve means automatically alternates the loaded pump each successive startup. This alternate loading tends to equalize wear among the several pumps, thereby affording a longer life before fuel system overhaul is required. The valve means also simultaneously serves a pressure relief function.

Claims (9)

1. A fluid delivery system comprising: a plurality of pumps, each of the said pumps having an inlet and an outlet; a plurality of inlet conduits respectively connected to said pump inlets for delivering fluid thereto; a plurality of discharge conduits respectively connected to said pump outlets for receiving discharge flow therefrom; a supply conduit fluidly interconnecting said discharge conduits to receive discharge flow therefrom and deliver fluid at system discharge pressure to a using device; and means automatically actuated by a predetermined decrease and subsequent predetermined increase in said system discharge pressure to bypass a discharge flow from each of said pumps in succession such that after each pressure cycle a pump different from the previously bypassed pump is bypassed.
2. A fluid delivery system, in accordance with claim 1, wherein said automatically actuated means comprises: means to prevent reverse flows in said discharge conduits; a selector valve, having a bypass passage, positionable in a plurality of discrete positions in which fluid is bypassed through said bypass passage from at least one of said discharge conduits to said pump inlets, the number of positions being at least equal to the number of said pumps; a plurality of branch conduits fluidly interconnecting said respective discharge conduits and said selector valve, said branch conduits being fluidly connected to said discharge conduits at Respective locations intermediate said preventing means and said outlets; a pressure-sensing conduit fluidly interconnecting said selector valve and said supply conduit to transmit said system discharge pressure thereto; means fluidly connecting said selector valve to said pump inlets; and an automatic indexing device responsive to said system discharge pressure connected to said selector valve to successively position said selector valve in said discrete positions when said system discharge pressure decreases a predetermined extent and then increases a predetermined extent such that each of said pumps is successively bypassed via said bypass passage as said selector valve moves between said discrete positions.
3. A fluid delivery system, in accordance with claim 2, wherein said selector valve includes: a housing having a bore therein and a plurality of pairs of inlet and outlet ports fluidly connected to said bore, the inlet and outlet port of each pair being respectively connected to one of said branch conduits and said pump inlet connecting means; and a piston disposed in said bore to form a chamber fluidly connected to said supply conduit, said piston containing said bypass passage, said indexing device being operatively connected to said piston to cause axial and rotational movement of said piston in said bore in response to changes in said system discharge pressure is brought into register with at least one of said pairs of inlet and outlet ports at a preselected magnitude of said system discharge pressure.
4. A fluid delivery system, in accordance with claim 3, wherein said piston comprises: a groove adapted to fluidly communicate with at least another pair of inlet and outlet ports at another preselected magnitude of said system discharge pressure to thereby direct discharge flow from one of said pumps which is not being bypassed to said pump inlets.
5. A fluid delivery system comprising: a plurality of pumps, each of said pumps having an inlet and an outlet; a plurality of inlet conduits respectively connected to the pump inlets for delivering fluid thereto; a plurality of discharge conduits respectively connected to the pump outlets for receiving discharge flow therefrom; a supply conduit fluidly interconnecting said discharge conduits to receive discharge flow therefrom; a plurality of check valves respectively associated with said discharge conduits intermediate said supply conduit and said outlets for preventing reverse flows in said discharge conduits; a selector valve, having a bypass passage, positionable in a plurality of discrete positions in which fluid is bypassed through the bypass passage from at least one of said discharge conduits to said pump inlets, the number of valve positions being at least equal to the number of pumps; a plurality of branch conduits fluidly interconnecting said respective discharge conduits and said selector valve, said branch conduits being fluidly connected to said discharge conduits at respective locations intermediate said check valves and said outlets; means fluidly connecting said selector valve to said pump inlets; a pressure-sensing conduit fluidly interconnecting said selector valve and said supply conduit to transmit system discharge pressure to said selector valve; and an automatic indexing device responsive to discharge pressure and connected to said selector valve to successively position said selector valve in said discrete positions when said system discharge pressure decreases a predetermined extent and then increases a predetermined extent such that each of said pumps is successively bypassed via said bypass passage as said selector valve moves between said discrete positions, said selector valve thereby serving to equalize the wear between said pumps.
6. A fluid delivery system, in accordance with claim 5, wherein the selector valve includes: a relief groove to direct discharge flow from one of said pumps which is nOt being bypassed to said pump inlets when said system discharge pressure exceeds a predetermined value.
7. A fluid delivery system, in accordance with claim 5, wherein said selector valve includes: a housing having a bore therein and a plurality of pairs of inlet and outlet ports fluidly connected to said bore, the inlet and outlet port of each pair being respectively connected to one of said branch conduits and said pump inlet connecting means; and a piston disposed in said bore to form a chamber fluidly connected to said supply conduit, said piston containing said bypass passage, said piston to cause axial and rotational movement of said piston in said bore in response to changes in said piston in said bore in response to changes in said system discharge pressure in said chamber such that said bypass passage is brought into register with at least one of said pairs of inlet and outlet ports at a preselected magnitude of said system discharge pressure.
8. A fluid delivery system, in accordance with claim 7, wherein said piston comprises: a groove adapted to fluidly communicate with at least another pair of inlet and outlet ports at another preselected magnitude of said system discharge pressure to thereby direct discharge flow from one of said pumps which is not being bypassed to said pump inlets.
9. A fluid delivery system comprising: at least two pumps, each of said pumps having an inlet and an outlet; at least two inlet conduits respectively connected to said pump inlets for delivering fluid thereto; at least two discharge conduits respectively connected to said pump outlets for receiving discharge flow therefrom; a supply conduit fluidly interconnecting said discharge conduits to receive discharge flow therefrom and deliver fluid at system discharge pressure to a using device; a valve housing having a bore therein and at least two inlet ports and at least two outlet ports in communication therewith; means respectively fluidly interconnecting said inlet ports with said discharge conduits at respective locations intermediate said pump outlets and said preventing means; means fluidly interconnecting said outlet ports and said pump inlets; a piston mounted within said bore for sliding movement therein, said piston having a bypass passage and a groove, said passage adapted to fluidly interconnect one of said inlet ports with one of said outlet ports to bypass at least one of said pumps and said groove adapted to simultaneously fluidly interconnect the other of said inlet ports with the other of said outlet ports at certain piston positions, the area of communication between said groove and said other ports increasing as said piston slides within said bore in a predetermined direction; means communicating said system discharge pressure to an end of said piston to drive said piston in said predetermined direction; spring means urging said piston in the direction opposite to said predetermined direction to bias said piston against said system discharge pressure; and means to rotate said piston within said bore during sliding movement of said piston in both said predetermined and opposite directions such that said bypass passage and said groove fluidly interconnect different inlet and outlet ports when said piston moves a certain distance opposite to said predetermined direction and then moves a certain distance in said predetermined direction.
US880648A 1969-11-28 1969-11-28 Wear equalized fuel delivery system Expired - Lifetime US3601506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88064869A 1969-11-28 1969-11-28

Publications (1)

Publication Number Publication Date
US3601506A true US3601506A (en) 1971-08-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US880648A Expired - Lifetime US3601506A (en) 1969-11-28 1969-11-28 Wear equalized fuel delivery system

Country Status (1)

Country Link
US (1) US3601506A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692432A (en) * 1970-12-22 1972-09-19 Ford Motor Co Two-stage positive displacement pump
US3716308A (en) * 1970-01-28 1973-02-13 Bosch Gmbh Robert Hydraulic system
US4444014A (en) * 1982-01-18 1984-04-24 The Garrett Corporation Control arrangement for an hydraulic assist turbocharger
US4478043A (en) * 1982-01-18 1984-10-23 The Garrett Corporation Method for controlling the operation of an hydraulic assist turbocharger
FR2546981A1 (en) * 1983-06-03 1984-12-07 Bosch Gmbh Robert HYDRAULIC MACHINE COMPRISING TWO GEAR PUMPS OR MOTORS
WO1985000202A1 (en) * 1983-06-29 1985-01-17 Peter Norton Plural hydraulic pump system with automatic displacement control
US4622817A (en) * 1984-09-14 1986-11-18 The Garrett Corporation Hydraulic assist turbocharger system and method of operation
US4832579A (en) * 1985-01-22 1989-05-23 Peter Norton Plural hydraulic pump system with automatic displacement control and pressure relief valve
US5228289A (en) * 1983-06-29 1993-07-20 Peter Norton Plural hydraulic pump system with unloading valve
WO2002081924A1 (en) * 2001-04-05 2002-10-17 Bristol Compressors, Inc. Pressure equalization system and method
US20050066673A1 (en) * 2001-04-05 2005-03-31 Bristol Compressors, Inc. Pressure equalization system
US20120219429A1 (en) * 2011-02-24 2012-08-30 Hamilton Sundstrand Corporation Fuel system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655109A (en) * 1944-05-03 1953-10-13 Power Jets Res & Dev Ltd Pressure fluid supply system
US2665637A (en) * 1947-05-07 1954-01-12 Borg Warner Pumping system
US2835323A (en) * 1953-10-13 1958-05-20 Plessey Co Ltd Fuel systems for internal combustion engines and gas turbines
US2944597A (en) * 1957-02-20 1960-07-12 Thompson Ramo Wooldridge Inc Fuel system
US2968348A (en) * 1957-10-03 1961-01-17 United Aircraft Corp Multi-pump system having speed and pressure rise responsive by-pass means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655109A (en) * 1944-05-03 1953-10-13 Power Jets Res & Dev Ltd Pressure fluid supply system
US2665637A (en) * 1947-05-07 1954-01-12 Borg Warner Pumping system
US2835323A (en) * 1953-10-13 1958-05-20 Plessey Co Ltd Fuel systems for internal combustion engines and gas turbines
US2944597A (en) * 1957-02-20 1960-07-12 Thompson Ramo Wooldridge Inc Fuel system
US2968348A (en) * 1957-10-03 1961-01-17 United Aircraft Corp Multi-pump system having speed and pressure rise responsive by-pass means

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716308A (en) * 1970-01-28 1973-02-13 Bosch Gmbh Robert Hydraulic system
US3692432A (en) * 1970-12-22 1972-09-19 Ford Motor Co Two-stage positive displacement pump
US4444014A (en) * 1982-01-18 1984-04-24 The Garrett Corporation Control arrangement for an hydraulic assist turbocharger
US4478043A (en) * 1982-01-18 1984-10-23 The Garrett Corporation Method for controlling the operation of an hydraulic assist turbocharger
FR2546981A1 (en) * 1983-06-03 1984-12-07 Bosch Gmbh Robert HYDRAULIC MACHINE COMPRISING TWO GEAR PUMPS OR MOTORS
US5228289A (en) * 1983-06-29 1993-07-20 Peter Norton Plural hydraulic pump system with unloading valve
WO1985000202A1 (en) * 1983-06-29 1985-01-17 Peter Norton Plural hydraulic pump system with automatic displacement control
US4622817A (en) * 1984-09-14 1986-11-18 The Garrett Corporation Hydraulic assist turbocharger system and method of operation
US4832579A (en) * 1985-01-22 1989-05-23 Peter Norton Plural hydraulic pump system with automatic displacement control and pressure relief valve
WO2002081924A1 (en) * 2001-04-05 2002-10-17 Bristol Compressors, Inc. Pressure equalization system and method
WO2002081923A1 (en) * 2001-04-05 2002-10-17 Bristol Compressors, Inc. Pressure equalisation system and method
US6584791B2 (en) 2001-04-05 2003-07-01 Bristol Compressors, Inc. Pressure equalization system and method
US6823686B2 (en) 2001-04-05 2004-11-30 Bristol Compressors, Inc. Pressure equalization system and method
US20050066673A1 (en) * 2001-04-05 2005-03-31 Bristol Compressors, Inc. Pressure equalization system
US7260951B2 (en) 2001-04-05 2007-08-28 Bristol Compressors International, Inc. Pressure equalization system
US20120219429A1 (en) * 2011-02-24 2012-08-30 Hamilton Sundstrand Corporation Fuel system
US9133772B2 (en) * 2011-02-24 2015-09-15 Hamilton Sundstrand Corporation Fuel system

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Legal Events

Date Code Title Description
AS Assignment

Owner name: COLT INDUSTRIES OPERATING CORPORATION, A CORP. OF

Free format text: MERGER;ASSIGNORS:LEWIS ENGINEERING COMPANY, THE, A CT CORP.;CHANDLER EVANS INC., A DE CORP.;HOLLEY BOWLING GREEN INC., A DE CORP.;REEL/FRAME:004747/0285

Effective date: 19870706

Owner name: COLT INDUSTRIES INC., A PA CORP.

Free format text: MERGER;ASSIGNORS:COLT INDUSTRIES OPERATING CORP., A DE CORP.;CENTRAL MOLONEY INC., A DE CORP.;REEL/FRAME:004747/0300

Effective date: 19861028