US670215A - Valve-port line. - Google Patents

Description

Patented Mar. I9, I90I.

Wi. J. ULRICH.

VALVE PORT LINE.

(Application led June 30, 1900.)

(No Model.)

l mi uonms Pzsns co.. Puo'rouruo.. WASHINGTON. u. c.

llrrirnn Sterns Flament Prien.

VALVE-PORT LINE.

SPECIFICATION forming part of Letters Patent No. 670,215, dated March 19, 1901.

Application led June 30, 1900. Serial No. 22,136. (No model.)

To all whom t may concern.-

Beit known that I, MAX J.ULRICH, a citizen of the United States, residing at Holyoke, in the county of Hampden, State of Massachusetts, have invented a new and useful Improvement in Valve-Port Liners, which improvement is fully set forth in the following specidcation and accompanying drawings.

My invention consists of an improved construction of a valve-port linerwhich is adaptmovements are imparted at the proper intervals to the slide and cut-off valves.

It further consistsin the provision of means for holding the valve-port liner immovable longitudinally, but permitting said liner to move vertically to compensate for wear.

It further consists of novel details of construction, all as will be hereinafter more fully described, and particularly pointed out in the claims.

Figure 1 represents an end view of a cnt-od valve, slide-valve, and the interposed valveport liner embodying my invention, a portion of the valve-chest being shown in section. Fig. 2 represents a section on line mx, Fig. 1, showing the right-hand cut-off valve, valveport liner, main valve, and their adjuncts in assembled position. Fig. 3 represents a section on line `y y, Fig. 1, showing the left-hand cut-off valve, valve-port liner, main valve, and their adjuncts. Fig. 4 represents an outside view showing the relative positions of the valve-rods and their adj uncts. Fig. 5 represents, on an enlarged scale, a side elevation of a portion of the valve mechanism seen in Fig. 3, whereby the slide and cut-off valves between which the valve-port liner is interposed are actuated. Fig. 6 represents an end view of an adjustable collar, seen in detached position. Fig. 7 represents a section on line ,e e', Fig. 5. Fig. 8 represents, on an enlarged scale, a sectional view showing the valve-port liner, cut-od and main valves, and the lugs, whereby longitudinal movement of said liner is prevented, the section being taken on line m', Fig. 3. Fig. 9 represents, on an enlarged scale, a sectional perspective view of the left-hand valve-port liner and cut-off valve.

Similar numerals of reference indicate corresponding parts in the figures. l

Referring to the drawings, l designates the right-hand steam-cylinder, which is provided with only single ports 2 and 3 in each end thereof,as contradistinguished from the usual style of d upleX-pump steam-cylinder wherein two ports at each end are employed to form a steam-cushion, it being apparent that in my style of cylinder, having one -port at each end, the clearance is considerably reduced.

8 designates the main slide-valve, which is provided with the ports 9 and l0,which permit.- the inlet of the motive fluid to each end of its cylinder, said valve having also the recess or port 11, whereby the exhaust is permitted when the parts are in the position seen in Fig. 2 to flow to the main exhaust-port 12.

13 designates the valve-port liner, which is supported upon the main slide-valve and is adapted to receive the cut-off valve 14, said main slide-valve receiving its motion, as usual, from the opposite steam side, While the cutoff valve obtains its motion from its own side of the engine. The valve-port liner 13 is an open-ended casing, provided at its opposite ends with the lugsi, which abut against the ribs 5, located at the ends of the steam-chest, said liner being interposed between the main and cut-off valves and provided with the ports 6 and 7, it being apparent that while the liner 13 is immovable longitudinally it is free to move vertically or transversely to compensate for wear, the lugs et and ribs 5 serving as guides.

Referring now to Fig. 2, it will be seen that if three-quarters cut-off is desired after the right-hand steam -piston .15 has traveled three-quarters of its stroke the main lever 16, which operates in unison with said piston by reason of its engagement with the spool 17 on the rod 18, will, because of its connection to the tappet 19 by the link 20, in conjunction with the collars 21 or 22, at the proper time close the steam-port of the main slide-valve. Thus to effect a cut-off on the right-hand side the cutfolf valve will have to travel in the same direction as its piston is traveling, while on the left-hand side the corresponding cut'oif valve has to travel in a direction opposite to its piston, the main slide-valves thus being constructed alike, while the eut-oil' valves slightly dil'fer in construction. The motion and regulation of each of the cutoff valves is effected by the proper tappet, which receives its motion from the proper main lever. The collars 2l. and 22 are similar and threaded internally to engage the threaded portions of the cut-oif-valve rod 23, and when said collars are adjusted nearer to the tappet an early cut-off results, and when adjusted farther apart a late cutoff results. Each collar is slotted, as at 24, and provided with set-screws 25, whereby they can be retained in any desired position.

2G designates an index secured to each cutoif-valve rod to indicate precisely at what cut-off each steam end is working under, each of said cut-olf-valve rods having` its free end guided in ways 27 in the bearing-stand 2S. The lost motion of the main slide-valve, which must necessarily exist in this class of pumps, is either of the fixed or adjustable type, and I have changed the usual location of the lost-motion block to the valve-rod head, thereby diminishing the length of the steamchest and simplifying the construction, and thus reducing the cost of manufacturing to a minimum. The valve-rod head-pin 29 of the main right-hand valve-rod 30 runs directly in the slot 3l of its link 32 without necessitating the employment of any blocks as used heretofore, provided a so-called fixed inadjustable lost motion7 is used.

It will be seen from Fig. 2 that the distance between the steamports on the upper portion of the main slide-valve is dimensioned so that at the desired cut-otf there will always be a free opening for the entering steam at either the forward or return stroke, said main valve having on its front end a pocket 33 to receive the collar of the valve-rod, no lost motion being allowed here. The cut-oi valves are preferably cylindrical, so as to enable them lo work with the greatest possible freedom, each cutoff valve being balanced and guided in the valve-port liner, which is a very important feature in case the steam end of the pump should stand upright or be hung vertically.

The right'hand cut-off valve 14 is made in the sections 34 and 35 in order to get short straight ports in the main valve 8, said sections being joined by the neck 36, adjacent to which are ports 37,whereby steam can enter from the valve-chest at any time from both ends to iill the inner portion of the right-hand cut-oft valve and thence enter its steam-cyl inder.

3S designates the main valve of the lefthand cylinder, said Valve being provided with ports and supporting the valve-port liner 30, which is constructed substantially like the right-hand liner 13.

40 designates the left-hand cut-off valve, (best seen in Fig. 3,) which may be a cylinder having a hub,wherein is secured an end of the left-hand cutoff-valve rod 4l,which carries an index 42, tappet 43, and adjustable collars 44 and 45, all of which are similar to the corresponding parts seen in Fig. 2, said cutoff-valve rod 4l also having itsfreeend guided and sup ported in its bearing-stand. The left-hand tappet 43 has connected thereto one end of the link 46, the other end of the latter being connected to the lever extension 47 ot' the left-hand main lever 48, it being of course understood that the well-known duplex Inotion is employed in the left-hand as well as the right-l1and side of the pump or engine, as already explained, one piston following the other after the iirst has nearly completed its stroke. In other words, each slide-valve receives its motion as usual from the opposite piston while each cutoff valve obtains its motion from the main lever on its own side. The lefthand main-valve rod 49 is provided with a lost-motion connection between the valverod head 50 and 51, as will be clearly understood from Figs. 3 and 5, said lost-motion connection being similar to that already describedin connection with Fig. 3. It will thus be seen that by my variable cut-off-valve gear any ratio of expansion can be had in the limit of one-half stroke to full stroke on each side and that, furthermore, the right-hand and left-hand side can be adj usted independently of each other, which also holds good for the yoke end and head end of each cylinder.

I have shown in Fig. 2 an arrangement of the ports which is especially applicable to my construction of valve mechanism, wherein I employ three ports on the cylinder-face and but asingle port communicating with the bore of the cylinder at each end thereof, said ports being located far enough in the bore to effect the requisite cushioning of the steam-piston. I also employ the V-shaped ports 52 and 53, located at the ends of the cylinders, in order to permit the new live steam to enter behind the piston and give the same its initial start, the V-shaped ports (seen in Fig. 2) being of course applicable to both cylinders.

I desire to lay especial emphasis upon my novel feature ot' providing each high-pressure cylinder in a duplex engine with but a single port leading into each extremity of each steam-cylinder, each of the latter being provided-with a cut-off valve coacting with its main slide-valve and the interposed valveport liner, in combination with the other novel features of my invention. Asis well known to those skilled in this art, in the highpressure steam-cylinders of a duplex pumping-engine Where no cut-oii` is employed it is the usual practice to employ two ports at IOO IIO

IZO

each end of said cylinders for the purpose of creating a cushioning effect upon the piston, it being evident that the live steam has to fill these two ports before any propulsion of the steam-piston can take place, it beingalso apparent that as quick as the main slide-valve opens to the atmosphere said live steam contained in these two ports will escape to the atmosphere without doing any useful work, said ports having to be refilled at every stroke, which is very wasteful, as is evident. Now when a cut-off valve is employed for each cylinder in conjunction with a single port at each end of each cylinder it is unnecessary to make allowance for any cushioning, since the latter is perfectly under the control of the operator and is effected by adjusting the cut-od, whereby the piston is prevented from striking the cylinder-heads and a single port leading into the end of each cylinder will suffice.

My invention can be readily applied to the smallest as well as the largest steam-pumps and is also equally well adapted to compound or triple-expansion pumping-engines.

It will be apparent that a duplex pump equipped with my invention can readily show an economy or saving of thirty per cent. to fifty per cent. in fuel, and that under certain conditions its efficiency will equal that of a compound pumping-engine.

It will be understood that I do not limit myself to steam pu mping-engines exclusively, as the principle of my invention is equally well adapted to compressed air and all other engines or motors as well.

` When my invention is applied to compound or triple-expansion engines, it will of course be apparent that the cut-off valve is applied to the high-pressure cylinder only, and in such cases cut-off valves of various shapes may be employed, if desired. In cases Where an intermediate cylinder is employed between the high-pressure and low-pressure cylinders in a triple-expansion engine it will be linderstood that the low-pressure and intermediate cylinders will have the usual slide-valves, which will coact with the main slide-valve on the high-pressure cylinder, upon which latter slide-valve my improved valve-port liner and cut-off valve are mounted.

I have deemed it unnecessary to illustrate the various modifications hereinabove referred to, as the principle of operation is the same in each instance.

I desire to lay especial stress upon the employment of my novel construction of valveportliner,which is longitudinally immovable, but free to move in an opposite direction or transversely to compensate for Wear, wherefrom it will be apparent that the cut-off valves will positively cut off at the desired part of the stroke under all conditions, whether the pump runs normal, full, or short stroke, or in whatever position the same may stand.

Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

l. A duplex steam-pump consisting of a plurality of high-pressure steam-cylinders, steam-chests therefor, each cylinder having three ports on its face, and asingle port communicating with each end of each cylinder, main slide-valves for each cylinder, cut-off valves for each of said slide-valves, a valveport liner between said main and cut-off valves, said valve-port liner being immovable longitudinally but capable of transverse movement, means for causing one of said cutoff valves to travel in the same direction as its piston, and means for causing the other cut-off valve to travel in an opposite direction to its piston.

2. In a duplex steam-pump, a plurality of cylinders, steam-chests therefor, each of said cylinders having three ports on each of their faces and a single port communicating with each end of each cylinder, main slide-valves for each cylinder, cut-off valves, a valveport liner between said main and cut -o valves, said valve-port linerbeing immovable longitudinally but capable of transverse movement, means for actuating said slidevalves, means for causing one of said cut-off valves to travel in the same direction as its piston, and means for causing the other cutoff valve to travel in an opposite direction to its piston.

3. The combination of aplurality of cylinders, main slidevalves therefor, cutoff valves, one of said cut-od valves consisting of sections joined by a hub, ports in said sections adjacent said hub for permitting the motive fluid to fiow therethrough to said slide-valves, a movable valve-port liner intermediate said cutoff and slide valves and meansfor actuating the latter and said cutoff valves.

4. The combination of a cylinder, a main slide-valve therefor, a valve-port liner mounted on said slide-valve and immovable longitudinally but capable of transverse movement to compensate for wear, a cut-off valve located within said liner, said cut-off valve consisting of a section joined by a hub, ports in said sections adjacent said hub, and mechanism for operating said slide and cut-off valves.

5. In a duplex pumping-engine, a pair of cylinders having pistons therein, main slidevalves for said cylinder, cut-off valves for said main valves, a valve-port liner interposed between said valves and capable of transverse movementto compensate for wear, one of said cut-off valves being composed of sections joined by a hub or necks, ports in said sections adjacent each hub, the other cut off valve being a plain cylinder, and means for actuating said main and cut-o valves.

6. A steam pumping-engine, consisting of a IOO IIO

plurality of high-pressure steam-cylinders, a valves consisting of sections joined by a hub, single port leading Lo each end of each of said ports in said sections adjacent said hub and Cylinders, main slide-Valves for each eylinmeans for actuating said valves. der-,cut-o valves for each of said slide-Valves,

5 a valve-port liner interposed between said Witnesses:

valves and capable of transverse movement HENRY E. CASTELLON, to compensate for Wear, one of said eut-0ff JOHN W. DAWSON.

MAX J. ULRICH.

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