US2475248A - Regulating system for pumps - Google Patents

Description

July 5, 1949. Q NORTON 2,475,248

REGULATING SYSTEM FOR PUMPS Filed Sept. 4, 1945 RECEIVER I N VEN TOR.

Patented July 5, 1949 2,475,243 n EeULArmG-sYsTen; Fervent res f Orlp 0. Norton, Erie Pa.. assigngrof. twentyqfive.

per cent to -William J. Shea, -.Erie, 1lla..

Application September '4, 1945, Serial No; 614,218

Claims. 1;

This inventionrelates generally to pumps :and". compressors, and moreparticularlyto regulating means therefore;

Inxall devices of this character madeaccordin to the teachings of the prior art, and with which I am familiar, the output of air or gas compressors is usually controlled by regulators which throttle the intake or hold the intake valves open or use of clearance pockets resultingin low efliciency and abrupt changes in load .or the capacity of constant speed. liquid pumps is usually controlled by regulators which holdopen -the suction valves, stopsthe machina or it bypasses the; liquid back to .the suction side of-the. pump.

It is, accordingly; an object of 'my-invention :to overcome the above and other-"defects in. present regulators for fluid pumps and the like and it. ;is more particularly an. object of my inventiqn to provide regulating means for a fluid pumporthe like which is simple in; construction, economical in-cost; efficient inoperatlon, andeas'y to installg operate, and maintain.

Another object of myinvention is.to provide regulatingmeans for a fluid pumportlie like which delays closing of the intake valves during the compressionstroke of a pump to regulate the capacity.-

Another object of my invention. is to provide" regulating means for opening thesuction valves of a pump during the intake and compressionstroke resulting in better volumetric eificiency.--

Another object of my invention is to provideregulating means for fluid pump or the like wherein a maximum charging efficiency isobtained with a light super-charging;

Another object of'my inventionris to provide regulatingmeans for 'a fiuid pump orthe-like wherein the piston is cushioned, the thermal-em cieney is increased-,and no threttlingtakes place at any time.

Another object of my invention-is to provide regulating: means for a pump wherein fiuidsunder pressureds admitted-under the .xintake valves: to.- openitrduring the suction-strelteanrl during none. orallofrth'elpumping or-compression strokes.

Other objects zofimy invention *Will become-:evi i dent? from: the following detailed description, taken in 1. conjunction with the -.aceompanyi-Iig drawingsgin'which,

Fig; i 1" is'saa'ldngitudinal: vertical SEGEiOI'l-Eli-VifiW of J a pump; member with, my riovelrre'gulating -i system connected therewith.

Figs2iis1adiagrammatic view. ofiarump mem her wlthniaiimodifledi furnnofzrsgulatinmsystem's: and? "tubes H and I2 extend.

2. Fig.3 is; a diagrammatic view of apump mem-. her ,with another form of regulating system.

Referring now to thedrawings, Fig. 1 shows a cylinder. 1 having end members 2 and .3, inlet.

chamber 4 with inlet valves fiend 6 leading to oppositeends. of. the cylinder l and an outer or discharge chamber 1 connected. with a receiver 33,:without1et or discharge valves 8 and 9 leading. thereto fromthe cylinder l. A reciprocating pistonmdnoves in the cylinder 5 powered by a.

suitable: prime mover (not shown) Small tubular bleeder tubes H and, I2 are 'dis posed inithe end-membersfZ-and 3 withv check valve members; l3 and It lead to a regulating cylinder :IEli andto connecting-tubular members leiand ll. Tubular members It; and I! lead to" the underside of, .diaphragins l8 and It disposed in inlet valves and 6. "Upwardly extending members 2t and ill on the diaphragms It and I9 Jextendthrough passages 22 and 23 and sealing membersZt and 25 are disposed on the upper ends of the. projectingmembers 2t and 2! to seal passages 2t and 23 when the piston it moves in J the cylinder l. Stop members 2% and 2? limit the "movement. of the diaphragms land it and proje'cting members it and 2! withsealing members 24 and 25.

The regulating cylinder W has centrally disposed-apertures 38 '"through which the bleeder Thebottom end of the cylinder 1 l'a-has a threaded portion 3! to which is engaged a threaded tubular member 32 leading to the receiver The upper end of the-cylinder it has a threaded portion engaged by a threaded cock; member flii to permit bleeding of air from.

the-cy1inder H5 and connecting bleeder tubes and i 2. llpistonfit is disposed-in the cylinder it: below the apertures and is urged to the bottom of the cylinder l5 by a spring 3?. Different strength-springs maybe disposed in cylinder 15 to requiregmore'or-less pressure to move the piston 36f upwardly in-the cylinder oryregula'ting means (not shown) jmay be provided to regulate the pressure-of the spring 3?? In :operatienpthe piston 53 is 'reciprocated in the cylinder tansa small amount of" fluid is foreed altern'ate'ly throng-lithe tubular members iland: l2-anddmmediate1y bled; off by the cock member 35; The pressurein the receiver 33 will continueato rise until a predetermined pressure is reached Aiiuunder pressure will pass through the tubular -me1nbe1s 32. from the receiver 33 move=thepistonfililupwardly agnimst the force of the spring I "31 to.zclosertheuapertures'3tin"the; "cylinder .l 521. Ainwillithen: pass-from thebleeder tubes l I and I2 alternately to the tubular members l6 and I! to force the .diaphragms l8 and I9, projecting members 20 and 2!, and sealing members 24 and 25 upwardly to open the passages 22 and 23 during the intake stroke and on further rise of pressure in the cylinder i, during all, part or none of the compression stroke of the piston l8 depending on air demand. The air in the ends of the cylinder I completely fills the area thereof between the piston I and the ends of the cylinder l in that the cylinder l is always completely filled on the suction or intake stroke of the piston 50 and only a predetermined part of the air is retained in the cylinder I for a given load. It will be evident that the charges of air to the oppositely disposed valves and 6 are in step with the reciprocating piston it and they operate alternately with the reciprocation of the piston Ill.

Fig. 2 shows a slightly modified regulating member. A cylindrical member it has bleeder tubes ti and d2 with check valves it and i -l leading therein through apertures 65 from opposite ends of a cylinder i5 similar to the cylinder i shown in Fig. 1. Tubes 4? and d8 lead to diaphragms controlling intake valves (not shown) in the cylinder and to apertures dill in the cylin'rical member til. The lower end of the cylins al member 58 has a threaded portion 5'?) for receiving the threaded tube 5! leading to a recci (not shown) as in Fig. 1. An air cook 52 other end of the cylindrical mem a} to open it to air and to free fluid therefrom. A piston 53 having a grooved portion 5d and should 53 on the upper end thereof and urged (101 r. the spring 55 is disposed for mov cylindrical member 55. A screw in vents rotation of the piston by slot 5"! in the piston The piston 53 has laminated inch is energized by the coil to which surrounds the cylin drical member it. Electrical conductors iii and G2 lead to coil 5E3. Switchin means (not shown) connected and operable with motor (not shown) causes energization of the coil upon nanges the motor output. Th actor is used for operating the piston on the piston rod 63 in the cylinder 28.

In operation, when the pressure in the receiver (not shown) reaches a predetermined pressure, the piston 53 is moved upwardly the force of the spring "it to close the bleeder apertures t5 and thereby prevent fluid from entering the cylinder til to pass to the tubular members il and it to diaphragms in the intake valves (not shown). The fluid normally passes from the bleeder tubes ll and i2 alternately to the tubes and ll} and to the diaphragms in the intake valves (not shown) in the cylinder is to hold ti ntake 'alves open during the suction stroke d during all, some, or none of the compression vioke. The shoulder 5d of the piston ill acts as a throttle to the fluid passing from the bleeder tubes H and to the tubes ii and 453. This throttling will take place on a heavy or light load in that the piston 553 would be located in the bottom of the cylindrical member and the upper shoulder 53 of the piston would be allrr y opposite the apertures id leading to the tubes ill and which in turn lead to the intake valves (not shown) in the cylinder 55. The threaded cock 52 may be used to increase or decrease the spring pressure. It will be seen that this design provides a very economical regulating member for a compressor under heavy loads. The coil to mayeause theupwardmovement-of the in the u piston 53 through magnetic force when it is energized in accordance with any predetermined variation in output of an electric motor.

Fig. 3 shows a cylindrical member 16 exactly the same as the cylindrical member to shown in Fig. 2. The bleeder tubes H and 12 from the cylinder '73 have resilient members it and F5 inserted in housings 16 and 11, which give resiliency to fluid causing it to open and hold open intake valves l8 and it after flow from cylinder iii has ceased at the completion of the compression or pumping stroke. It will be seen that I have shown bellows as the resilient members Hi and i5 although any suitable means may be used. Bleeder lines 38 and 3! lead to the cylindrical members ill from each end of the cylinder 82 as Figs. 1 and 2 In operation, fluid enters the cylindrical member ill through bleeder tubes 88 and 85 from alternate ends of the cylinder 82 and passes through the bleeder lines H and E2 to the resilient members Hi and i5 and to the intake valves '58 and it. The resilient members 14 and 15 are compressed and after the fluid flow has ceased, pressure will be exerted by the resilient members 74 and to hold the intake valves 18 and "iii open a predetermined length of time.

all. of these designs there is no passage from one end of cylinder to the other, then there can be no by-passing.

It will be seen from the foregoing that I have vided a. practical and eflicient means for reguting a fluid pump with minimum of moving ts, which permits fluid compression in accorde h demand, improved starting efliciency, uniform load, a cushion at the end of the -n stroke, improved thermal efficiency, and ....thout throttling of the intake or valves.

Various changes may be made in the specific embodiment of my invention without departing from the spirit thereof, or from the scope of the appended claims.

What I claim is:

l. A regulator for a fluid pump having a cylinder, a reciprocating piston therein, and inlet and outlet valves on opposite ends of said cylinder and receiver connected therewith comprising bleeder tubes in each end of said cylinder, diaphragms for opening and closing said intake valves connected with said bleeder tubes, a regulating cylinder connected with said receiver and said bleeder tubes, and a spring-urged piston to close said bleedcr tubes whereby said diaphragins are moved alternately by pressure created by movement of said reciprocating piston to hold open said intake valves during any predetermined part of the movement of said recipro eating piston.

2. A regulator as set forth in claim 1 wherein check valves are disposed in said bleeder tubes.

3. A fluid compressor comprising a cylinder, a reciprocating piston therein, inlet and outlet chambers adjacent said cylinder, inlet and outlet valves on each end of said cylinder between said cylinder and inlet and outlet chamberaa fluid receiver connected with said outlet cham ber, blecdcr tubes on each end of said cylinder,

diaphragm members for opening and closing said intake valves connected with said bleeder tubes, a regulating member connected with said bleeder tubes and said receiver, and means operable by predetermined pressures in said receiver for closing said bleeder tubes whereby said diaphragm members are alternately move by the pressure in I said bleeder tubes created by said reciprocating piston to open said intake valves during any part of the movement of said reciprocating piston.

4. A fluid compressor system as set forth in claim 3 wherein check valves are disposed in said bleeder tubes.

5. A fluid compressor system as set forth in claim 3 wherein said last mentioned means is a spring-urged piston in said regulating member.

6. A fluid compressor system as set forth in claim 3 wherein a cock is disposed in said regulating member to open said member to free the fluid therein.

7. A regulator for a fluid pump having a cylinder, a reciprocating piston therein, inlet and outlet valves and a receiver connected therewith comprising bleeder tubes on opposite ends of said cylinder, diaphragms for regulating the opening and closing of said intake valves, tubes leadin to said diaphragms; and a regulating member connected with said receiver having spaced, oppositely disposed apertures for receiving said bleeder tubes and said tubes leadin to said diaphragms, and a grooved spring-urged piston in said regulating member adapted to normally throttle fluid passing to said tubes leading to said diaphragms and also adapted to close said bleeder tubes upon a predetermined pressure in said receiver.

8. A regulating member as set forth in claim 7 wherein said regulating member has an eleca Number trical coil disposed therearound to move said piston upwardly upon energization of said coil.

9. A regulator for a fluid pump havin a cylinder, a reciprocating pistontherein, inlet and outlet valves, and a receiver comprising bleeder tubes disposed in opposite ends of said cylinder, a regulating member connected with said receiver and said bleeder tubes adapted to close said bleeder tube on a predetermined pressure in said receiver, tubes connecting said regulating member and said intake valves to alternately hold said valves open, and resilient means in said tubes adapted to hold said intake valves open after flow of fluid from said regulating member ceases.

10. A regulator as set forth in claim 9 wherein said resilient means comprises compressible bellows.

ORLO C. NORTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Hill June 2, 1903 Wikander Aug. 24, 1915 Redfield June 27, 1922 Ochel Mar. 12, 1985 Cox et al a Jan, 13, 1942

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