US331711A

US331711A - Hydraulic pump

Info

Publication number: US331711A
Authority: US
Publication date: 1885-12-01
Anticipated expiration: 1902-12-01

Description

' 4 Sheets-Sheet I.

(No Model.)

J. H. HUBBELL.

HYDRAULIC PUMP.

No. 331,711. Patented Dec. 1, 1885.

(No Model.) 4 Sht aetsS1 1eet 2. J. H. HUBBELL.

HYDRAULIC PUMP.

No. 331,711. I Patented Dec. 1, 1885.

N. Pncns. Phalmlilhbguphr. Vhlhinglon. a. c

(No Medal.) 4 Sheets-Sheet 3.v

J. H. HUBBE'LL.

HYDEAULIU PUMP.

No. 331,711. Patented Dem-1, 1885.

13 (It) 2 w Ii m as a 9 if t a n (No Model.) 4' Sheets-Sheet 4..

J. H. HUBBELL.

HYDRAULIC PUMP. No. 331,711, Patented Dec. 1, 1885.

T .20 Z J G f I fig %//Z:ii///% aw x 5 Iberian ser es PATENT JOSEPH H. HUBBELL, OF DAYTON, OHIO.

HYDRAULlC PUMP.

SPECIFICATIGN forming part of Letters Patent No. 331,711, dated December 1, 1885.

Application filed June 5, 1885.

To (6Z2: whom, it may concern.-

Be it known that I, Josnrn H. HUBBELL, a resident of Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Hydraulic Pumps, of which the following is a specification.

My invention relates to improvements in hydraulic pumps.

One of the objects of my invention is to provide automatic means for stopping the pumping when the desired amount of pressure has been obtained. 7

Another object of my invention is to combine a series of high with one or more low pressure pumps, so that the low and high pressure pumps will successively contribute to obtaining the power, and each be automatically released from labor when it has produced its respective limit of pressure or power.

Another object of my invention is to so combine a series of pumps that one or moreof the high-pressure pumps can be worked at the same time and in conjunction with the lowpressure pumps which work in conjunction with one or more of the high-pressure pumps. By employing the pumps hereinafter described I am enabled to avoid all danger of bursting the pumps by supplying trippingpistons aud connections to automatically stop the pumping operations as soon as the desired pressure is obtained, and which autoinatic ally commence labor it the pressure in the force-main should fall below the maximum point.

The various features and other objects of my invention will be lully set forth in the description of the accompanying drawings, forming a part of this specification, in which Figure 1 is a side elevation of my improved pump; Fig. 2, a top plan view of the series Fig. 5. Fi 8 is a section on line 2: z, Fig. 5. Fi 9 is a partial plan view showing the connection of the low to the high press- Serial No. 167,757.

(No model.)

manner of connecting the passages between the different cylinders. Fig. 11 is a diagram showing the position of cranks. Fig. 12 is a side elevation of my improved cross-head. Fig. 13 is a longitudinal vertical section of the same; and Fig. 14, a section on line a b, Fig. 13.

A A A A represent the frame-work of the machine, on which the series of pumps are placed.

B represents the main driving-pulley.

1) represents driving-gear on the drivingshaft B, and 5 represents driving-gear on the crank-shaft.

'1 2 3 4 5 6 7 represent a series of cranks set at different angles, as shown in diagram Fig. 11, for driving the series of pumps 0 I) E F Gr II I. These pumps are preferably each made of a block of metal cast integral and cored and finished, with ports, passages, and chambers, as hereinafter described. They are placed parallel with each other upon the main frame of the machine in proper plane to be in line with the cranks and cross-heads. The two outside pumps 0 and I are designed for low-pressure pumps. Each is provided with a passage or opening. K, pierced clear through the block of the pump. Each of the series of highpressure pumps is provided also with a similar passage, K, bored in like manner, and th ese several passages oi'the diffcrentpumps are connected to each other by bushingpipes 8, as shown iuFig. 10, so as to form a continuous passage passing clear through the series,so that the supply-pipes J J, at either side supply all of the pumps with the fluid operated upon by the pump-pistons to produce the power.

9 represents the suction-valve on each of these low and high pressure pumps.

10 represents the low-pressure pistons, and 11 the high-pressure pistons. The low-press u re pistons 10 are preferably of ten times the area of the high-pressure pistons 11. Oil is preferably employed in the operation of the pumps; but any other suitable fluid may be used.

12- rep resents the check-valves in the passage above the pistons leading to the pressurepipes.

In the ordinary operation of the low-pressure pump 0 the oil is drawn up through valve ure pumps. Fig, 10 is a section showing the ICO 9 into passage a, and forced by the piston through passage a, raising check-valve 12, through passage a, into passage L, which passage is common to all ofthe pumps, as shown in plan, Fig. 9, the several blocks being connected by bushings Z.

- 13 represents a lowpressure safety-valve opening out from passage a, and M represents a weighted trippingpiston,which governs the operation of the lowpressure pump in the'following manner, as shown in Fig. 1.

d representsthe weighted arm holding down the piston M.

d represents the weight.

14 represents a link connecting arm cl-to lever 15, which is hinged to stem or piston 16, which works in the stuftingbox 17, passing vertically through and up into or against the suction-valve 9, as shown in Figs. 3,4,5. The weight d is adjusted on lever D, to limit the amount of pressure produced by the pumps 0 and -I. When the pressure in passage L is greater than the limit at which the weight d is adjusted to hold, the piston M will rise and lift the arm (Z, and with it link 14, arm 15, and piston 16, the raising of which piston holds the suction-valve 9 up off its seat, and stops the work of the pump-piston 10. Each of the pumps .0 and I is provided with similar regulating or tripping pistons, M, and automatic lifting apparatus for holding up the footvalve 9.

As the passage L is common to the pumps 0 and I, the same pressure upon the pumppiston will operate regulating-piston Min a uniform manner,which are weighted,say,ordinarilyto a limit of fou rhundred pounds pressure to the square inch. It follows, then, that when that limit is reached, if the piston 10 is traveling outward, regulating-piston M will be raised, and through it valve 9 kept from seating, and thus the operation of the pump -will be stopped; but if the piston 10 be traveling inward regulating-piston M cannot rise against the inward stroke of piston 10 to operate piston-rod 16, connected to the weighted arm d, and hence will not raise the valve 9, be cause the pressure is balanced between piston M and valve 9. Upon the next outstroke, however, of the piston, the pressure upon valve 9 will be relieved, and it will be caused to rise. At the same time valve M will be raised, and be kept in such raised position so long as the pressure in the pumps exceeds the weight upon the lever 0f the valve, and by the connections with valve 9 this valve will be kept in its raised condition likewise, and the operation of the pump be stopped.

To prevent the generation of an undue amount of pressure by the inward stroke of piston 10, I provide a safety -valve, 13, connecting the said passage L, which is weighted, say, at a pressure of ten or more pounds greater than the weight of regulating piston M, so that the pressure cannot, by the returnstroke of piston 10, be increased above four hundred and ten pounds to the square inch without lifting the valve 13, to relieve the excess of pressure during this portion of the stroke.

N represents a passage running through the pumps D E F G H I, and connecting by port N with the high -pres ure safetyvalve 0, which is preferably placed on pump I. This high pressure safety valve works only in connection with the operation of the highpressure pumps, which are all constructed alike in the following manner.

9 represents the suction-valves; 11, the piston; 12, the cheekvalve in the passage c,opening into passage 6. 17 represents the checkvalve in passage 6 for closing passage L. Passage is'suffieiently large around check-valve 17 to be unobstructed by it when raised off its seat.

P represents the pressure pipe leading to the piston-chamber of the press. Each highpressure pump is. provided with independent pipes P, so that each one may operate upon a differentpresspiston in unison with or inde- J pendent ofeach other.

R represents a high pressure regulating or tripping piston. It is provided with a weighted arm, f, link 9, and plunger-rod 16, seating against the foot of valve 9, and acting in the-same manner, as before explained, of the low-pressure regulating piston and connections. Arm f is weighted, so as to limit the pressure of the piston 11 to four thousand pounds per square inch, so that when the pressure rises to this amount and increases above it it will raise the piston R, and with it the connections to hold the foot-valve9 offits seat, and stop the operation of the pump on the outward stroke of the piston.

In order to prevent an undue excess ofpressure, caused by the return-stroke of the piston 11, after the pressure has reached four thousand, I provide a high-pressure safety-valve,

which connects with passage 6, through checkvalve 19, leading into passage N, which is sufficiently large to prevent checkvalve 19 from obstructing the passagewhen lifted. As the passage N is commonto the pumps D E F G H, passing through pump I, and communicating, through passage N,with the high pressure safety-valve O, which is weighted, say, to ten or more pounds above the regulatingpiston R, so that on the return-stroke of piston 11 the high-pressure valve 0 will rise, to relieve the accumulation of pressure above four thousand on this return-stroke on any one of the series of highpressure pumps, and on the next manner: The low-pressure pumps are limited in work to, say, about four hundred pounds pressure to the square inch by regulating the weight (2 of the regulatingpiston M. The safety-valve 18 is weighted a little higher. Valve S in the pipe P, leading to the piston chamber of the press,is opened, when the lowpressure pumps will commence supplying thispiston-chamber with fluid,passing through valve 9, passages a, a and L, through checkvalve 17 and passage 6, into any one of the pipes l which are open to supply the pistonchamber of its press. As soon the pressure is raised to fourhundred pounds, or the amount at which the regulating-piston M is weighted, it will rise on the pumps 0 and I, and lift the clieck-valvc,an(l stop the supply of oil or the fluid being pumped into the piston-chamber of the press. The highpressure pump connected to the press through pipe P, that is opened, is likewise at work at the same time with the low-pressure pump; but the object of the low-pressure pumps is to raise the press are quickly to their limit, and then allow the smaller and high-pressure pumps to complete the work more slowly. The high-pressure pump continues its work until its limit is reached, when, as before described, the regulating-piston R will rise and, with the connectinglink, lift the plunger 16 and suctionvalve 9, and stop the pumping of piston 11. All the pistons keep running, and their work is relieved by the holding of its suction-valve 9 up off its seat. Should, now, the pressure in the pipe 1? fall below the limit to which the piston It is weighted, the leverfwould immediately drop, closing the piston R down onto its seat, and the suction-valve 9 will commence operating. Piston 11 will pump the fluid into the pipe P until the pressure is again raised to the limit. Thus these several high pressure pumps will work individually its particular press, and keep the press at the desired limit of power automatically, avoiding the care and watchi'ulness of the attendant to maintain the pressure.

By employing the regulatingpiston in conj unetion with the safety-valve herein set forth I have a double safeguard against running up the pressure high enough to burst the pistonchamber of the press, which accident is of frequent occurrence in the other form of pumps which do not employ the combined safety and regulating devices.

it represents the pitman plunger-heads of the pumps.

T represents a wrist-block for the crossheads, to which they are connected.

i1 represents a recess. It is provided with screw-threads, into which the screw-threaded plunger-head It taps.

U represents a detachable section of the wrist T, which is connected to wrist-block T, set-screw aengaging against shoulder 15 of the a incline.

m represents packing-plates, which are preferably composed of a number of strips of steel; a, a set-screw passing through said packingstrips and tapping into the section U.

o represents a wrist-pin hinging the pitman h to the wrist-block. Any wearoi' the jointeonnections may be taken up by means of these packing-strips in and by means of the set-screw r.

Another advantage of employing the de tachable wrist-section U, held by the inclined set-screw r, is that it may be more easily taken apart and put together than the wristconnections hitherto employed for this purpose.

I claim- 1. The combination ofa lowpressure and a high-pressure pump having in common an inlet-pipe, K, and an exit-pipe, L, and each formed with a piston-chamber communicating with the said inlet-pipe, a suction valve controlling the communication between said pipe and chamber, a piston working in its chamber, a passage communicating with said exit-pipe, a passage connecting said passage and piston-chamber, a check-valve con trolling said connecting-passage,aweighted regulating-piston working in the passage communicating with the exit-pipe, and a system of levers connecting said weighted piston and the suction-valve, the high-pressure pump being also provided with a valve, 17, at the union of the exit-pipe and its communicating passage, and a pressure-pipe, P, substantially as and for the purposes described.

2. The combination of a lowpressure and a high-pressure pump having in common an inlet-pipe, K, and an exit-pipe, L, and each formed with a piston-chamber communicating with said inlet-pipe, a suction-valve controlling the communication between said pipe and chamber, a passage communicating with said exit-pipe, a passage connecting said passage and piston-chamber, a checkvalve controlling said connecting-passage, aweighted regulating-piston working in the passage communicating with the exit-pipe, and a system of levers connecting said weighted piston and the suction valve, the high-pressure pump being also provided with a passage, N, com municating with the regulating-piston pas sage, a high-pressure sai'etyvalve, 0, connected therewith, and a check-valve, l9, con trolling the communication between the regulating-piston passage and passage N, substantially as and for the purposes described.

3. The combination of a series of low-pressure and a series of high-pressure pumps having in common an inlet pipe and an exitpipe, each pump having an independent piston and valve-controlled passages connecting the inlet and exit pipes, a suction-valve, and a weighted regulating-piston connected by a system of lovers with the suction-valve, the low-pressure pumps being each further provided with a safety-valve so weighted above the regulating-pistons, and the high-pressure pumps having a safety-valve common to all of 5. The cross-head connection consisting of them,' substantially as and for the purposes the block T, detachable section u, packingdescribed. strips m, and setscrew r, for connecting the 4. The combination of aserics of high-presspitinan h with the pump-piston, substantially 15 5 ure pumps connected with one or more lowas specified.

pressure pumps by a continuous passage, each In testimony whereof I have hereunto set my having independent regulating-pistons for con hand. trolling the work, and a single safety-valve JOSEPH H. HUBBELL. common to all the high-pressure pumps, for WVitnesses:

10 preventing undue pressure upon the pump- ROBERT ZAHNER,

pistons, substantially as specified. M. E. MILLIKAN.