Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2706520 A
Publication typeGrant
Publication dateApr 19, 1955
Filing dateOct 29, 1947
Priority dateOct 29, 1947
Publication numberUS 2706520 A, US 2706520A, US-A-2706520, US2706520 A, US2706520A
InventorsChandler Milton E
Original AssigneeNiles Bement Pond Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fluid distributing apparatus
US 2706520 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

April 1955 M. E. CHANDLER 2,706,520

FLUID DISTRIBUTING APPARATUS Filed Oct. 29, 1947 INVENTOR iii/Z0125 (Fm/Idle!- A ORNEY United States Patent FLUID DISTRIBUTING APPARATUS Milton E. Chandler, New Britain, Conn., assignor to Niles-Bement-Pond Company, West Hartford, Conn., a corporation of New Jersey Application October 29, 1947, Serial No. 782,757

7 Claims. (Cl. 158-363) The present invention relates to apparatus for distributing fluid from a common source to a plurality of discharge points, and is illustrated as applied in connection .with a system for distributing fuel to a number of separate nozzles of an internal combustion turbine.

In a system of this type, it is desirable to deliver equal quantities of fuel to the nozzles of the turbine. This is diflicult because the external pressure conditions may vary from one nozzle to another. Another trouble which has been encountered in distributing systems of this type is that one or more of the nozzles may become partially clogged, resulting in uneven distribution. It has also been diflicult in prior systems to vary the total flow to all the nozzles while maintaining equal distribution to each nozzle.

An object of my invention is to provide an improved fluid distributing system.

Another object is to provide a system of the type described wherein provision is made to avoid uneven distribution due to clogging of the nozzles.

A further object is to provide a system of the type described which will be unaffected by the pressure conditions existing outside the several nozzles.

Another object is to provide improved means for regulating the total flow through all the nozzles while maintaining equalized distribution to each nozzle.

Other objects and advantages of the present invention will become apparent from a consideration of the appended specification, claims and drawings, in which The single figure illustrates, somewhat diagrammatically, a fluid distribution system adapted for use in a multiple nozzle turbine of the internal combustion type.

Referring to the drawing, the fuel comes from a tank (not shown), and flows through an inlet conduit 10, a pump 12, a discharge conduit 14, a number of parallel branch conduits 16, 18 and 20, leading to discharge nozzles 22, 24 and 26.

The three branch conduits 16, 18 and 20 each contain a metering restriction, numbered 28, 30 and 32, respectively.

The nozzles 22, 24 and 26 are similar in structure, and only nozzle 22 will be described in detail. Nozzle 22 includes a valve 34 operated by a flexible diaphragm 36, which separates a pair of expansible chambers 38 and 40. The chamber 40 is filled with fuel at the pressure existing on the downstream side of metering restriction 28. The chamber 38 is connected by a pilot branch conduit 42 to a pilot line 44. The pilot line 44 is connected by similar branch conduits 46 and 48 to chambers in the nozzles 24 and 26.

A by-pass connection leads from the discharge side of pump 12 through a restriction 50 in a by-pass conduit 52, a check valve 54, and a return conduit 56 to the inlet side of pump 12. The pilot line 44 is connected to conduit 52. The pressure in pilot line 44 is controlled by the force of the spring 58 which loads check valve 54. The check valve operates to maintain a substantially constant pressure in the pilot line 44.

The pump discharge pressure is controlled by a relief valve generally indicated at 60, which controls the flow through conduits 62 and 64 from the outlet to the inlet of the pump. Relief valve 60 includes a piston valve 66 operated by a bellows 68. The interior of bellows 68 is supplied with fluid at a variable control pressure through a conduit 70. The exterior of bellows 68 is subject to the pump discharge pressure through a conduit 72 in the valve 66. The relief valve mechanism 60 operates to 2,706,520 Patented Apr. 19, 1955 maintain the pump discharge pressure at a value determined by the control pressure supplied through conduit 7 0. Any suitable mechanism may be used for supplying the control pressure. For example, it may be that shown in my copending application Serial No. 664,412, filed April 23, 1946, now Patent No. 2,697,909, issued December 28, 1954.

The check valve 54 maintains a substantially constant pressure in the pilot line 44 and hence in the chamber 38 above diaphragm 36. The diaphragm 36 operates valve 34 to maintain a correspondingly steady constant pressure on the downstream side of the metering restriction 28. The nozzles 24 and 26 similarly maintain the same constant pressure on the downstream side of their respective restrictions 30 and .32.

The pressure on the upstream side of each of the restrictions 28, 30 and 32 is substantially the same as the pump discharge pressure which is regulated by the relief valve mechanism 60. It may therefore be seen that the three metering restrictions 28, 30 and 32 all have the same pressure drop across them, and hence, if their areas are the same, the flow through each of them is the same.

The flow through each nozzle is substantially independent of the pressure existing outside it. If any nozzle tends to clog, the pressure on the downstream side of its associated metering restriction will rise, opening the nozzle valve to reduce or eliminate the clogging.

Furthermore, clogging of one nozzle will not cause a pressure rise throughout the system, since the relief valve 60 prevents such a pressure rise.

The terms and expressions used herein are employed for purposes of description and not of limitation, and I have no intention, in the use of such terms and expressions, of excluding any equivalents of the features shown and described or portions thereof, but recognize that various modifications are possible within the scope of the invention claimed.

I claim as my invention:

1. In apparatus for distributing fluid, a common source of fluid, a plurality of discharge points, a main discharge conduit leading from said source to a plurality of branch conduits, each leading from said discharge conduit to one of said discharge points, a pump connected in series in said main conduit, a metering restriction in each of said branch conduits, a valve in each of said branch conduits downstream from its associated restriction, operating means for each said valve including a pair of expansible chambers separated by a movable wall, first means connecting one of said chambers to its associated branch conduit between the restriction and the valve therein so that the pressure in said one chamber acts on said wall in a valve opening direction; a by-pass conduit around said pump and a pilot source of fluid under pressure in said by-pass conduit, and second means connecting the other chambers of all said valve operating means to said pilot source so that the valves are operated to maintain equal pressures on the downstream sides of all said restrictions; and two flow restricting devices in series in said by-pass conduit; said second connecting means connecting said other chambers to said by-pass conduit between said flow restricting devices.

2. Fluid distributing apparatus as in claim 1, in which the furthest downstream of said two flow restricting devices includes a valve movable toward open position by the pressure on its upstream side, and a spring biasing said valve closed, said spring and valve cooperating to maintain the pressure between said two flow restricting devices at a substantially constant value.

3. Fluid distributing apparatus as in claim 2, including means for controlling the pressure of said common source to control the total flow therefrom.

4. Fluid distributing apparatus as in claim 3, in which said by-pass conduit leads from the outlet to the inlet of said pump.

5. Fluid distributing apparatus as in claim 3, in which said pressure controlling means controls the discharge pressure of said pump.

6. Fluid distributing apparatus as in claim 2, in which the fluid is a liquid fuel, and in which the discharge points are nozzles adapted to be located in spaces for the combustion of said fuel.

3 7. Fluid distributing apparatus as in claim 1, in which 2,165,447 spray nozzles are located at said discharge points and said 2,430,264 valves are located in said spray nozzles.

References Cited in the file of this patent 5 526,869 577,132

UNITED STATES PATENTS 1,930,455 Hannum Oct. 10, 1933 4 Browne July 11, 1939 Wiegand et a1 Nov. 4, 1947 FOREIGN PATENTS Germany Feb. 26, 1928 Great Britain May 7, 1946

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1930455 *May 20, 1931Oct 10, 1933Bailey Meter CoMethod of and apparatus for proportioning flowing fluids
US2165447 *Aug 6, 1936Jul 11, 1939Wright Aeronautical CorpPressure metering carburetor
US2430264 *Feb 23, 1944Nov 4, 1947Wright Aeronautical CorpContinuous fuel injection
DE526869C *Feb 26, 1928Jun 11, 1931Siemens AgRegelvorrichtung fuer stroemende Mittel
GB577132A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2757961 *Sep 7, 1950Aug 7, 1956Chrysler CorpRegulated fuel system
US2845939 *Oct 29, 1953Aug 5, 1958Thompson Prod IncCombined metering valve and flow distributor
US2867269 *Oct 29, 1953Jan 6, 1959Thompson Prod IncFuel flow and control system
US2986335 *Jan 28, 1960May 30, 1961Turnquist Ralph OTurbojet engine fuel distribution system
US3368538 *Nov 2, 1965Feb 13, 1968Pierburg Kg AFuel pump for motor vehicles
US3537654 *Nov 22, 1968Nov 3, 1970Bosch Gmbh RobertMetering and distributing device for fuel injection systems
US4534674 *Apr 20, 1983Aug 13, 1985Cutler Repaving, Inc.Dual-lift repaving machine
US4566416 *May 1, 1984Jan 28, 1986Stanadyne, Inc.Accumulator nozzle fuel injection system
US4833748 *Aug 29, 1985May 30, 1989Johannes ZimmerMethod and device for applying a flowable substance
US4862693 *Dec 10, 1987Sep 5, 1989Sundstrand CorporationFuel injector for a turbine engine
US4941505 *Apr 10, 1989Jul 17, 1990Danfoss A/SOil supply system for a burner nozzle including means for preventing the nozzle from dripping
US4967562 *Dec 12, 1988Nov 6, 1990Sundstrand CorporationTurbine engine with high efficiency fuel atomization
US4967563 *Dec 12, 1988Nov 6, 1990Sundstrand CorporationTurbine engine with high efficiency fuel atomization
US4989404 *Dec 12, 1988Feb 5, 1991Sundstrand CorporationTurbine engine with high efficiency fuel atomization
US5027603 *Sep 14, 1990Jul 2, 1991Sundstrand CorporationTurbine engine with start injector
US5101634 *Oct 15, 1991Apr 7, 1992Sundstrand CorporationFuel injector for a turbine engine
US5140807 *Feb 1, 1991Aug 25, 1992Sundstrand CorporationAir blast tube impingement fuel injector for a gas turbine engine
US5150570 *Dec 21, 1989Sep 29, 1992Sundstrand CorporationUnitized fuel manifold and injector for a turbine engine
US5163284 *Feb 7, 1991Nov 17, 1992Sundstrand CorporationDual zone combustor fuel injection
US5167122 *Apr 30, 1991Dec 1, 1992Sundstrand CorporationFuel system for a turbo machine
US5220794 *Jun 22, 1990Jun 22, 1993Sundstrand CorporationImproved fuel injector for a gas turbine engine
US5251725 *Jul 7, 1992Oct 12, 1993Castrol LimitedLubrication of power drive comprising large diameter gear
US5263316 *Dec 21, 1989Nov 23, 1993Sundstrand CorporationTurbine engine with airblast injection
US5366155 *Dec 4, 1992Nov 22, 1994Enichem Agricoltura S.P.A.By-pass arrangement for controlling the return flow of a pilot valve connected into an irrigation network
US5618347 *Apr 14, 1995Apr 8, 1997Kimberly-Clark CorporationApparatus for spraying adhesive
US6037009 *Apr 14, 1995Mar 14, 2000Kimberly-Clark Worldwide, Inc.Method for spraying adhesive
Classifications
U.S. Classification239/126, 91/51, 137/118.3, 60/746, 239/533.2, 239/76, 60/739, 137/98
International ClassificationF02C7/228, F02C7/22
Cooperative ClassificationF02C7/228
European ClassificationF02C7/228