US1173180A - Controlling-valve for steam-turbines. - Google Patents

Description

R. E'. EFFERT.v

- CONTROLLING VALVE FOR STEAM TURBINES.

Pamegd Feb. 29,1916.

2 SHEETS-SHttT l.

l R. R. DEFFERT. A CONTROLLING VALVE FOR STEAM TURBINES. 4

APPLICATION FILED MAY15. 1915.v

Patented Feb. 29,1916.

2 SHEETS-SHEET 2.

UNITED sTATEs PATENT onirica.I

RICHARD R. DEFFERT, OF MANVILLE, NEW JERSEY.

CONTROLLING-VALVE FORA STEAM-TURBINES.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Application led May 15, 1915. Serial No. 28,262.

To all 'whom 'it may'concem Y Be it known that I, RiorrARo R. DEFFERT, a citizen of the United States, and residing at Manville, in the county-of Somerset and State of New Jersey, have invented certain new and useful Improvements in Controlling-Valves for Steam-Turbines, of whichv and automatically controlled by the load on Y 'or applied to the engine; and with th1s and other objects in view the invention consists in a device 'or apparatus] of the class-specified, constructed and operated as hereinafter described andclaimed.

. The invention is fully disclosed in the following specification, Aot which the ,accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which:

Figure 1 is a' section on the line 1 1 of Fig. 2; Fig. 2 a section on the line 2 2 of Fig. 1; Fig. 3 a sectional and diagrammatic view of the complete device or. apparatus made according to my invention; Fig. 4 a view on an enlarged scale of a part of the construction shown in Fig. 3,'and showing the separate parts of said construction in a different position;-Fig. 5 a side view looking in the direction of the arrow 5 of Fig. 1 but omitting part of the construction shown in Fig.' 1: F ig. 6 a transverse section on the line 6 6 of Fig. 5' and on the line 6 6 of Fig, 1; Fig. 7 a section on the line'- 7 7 of Fig. 8; Fig. 8 a section on the line 8 8 of Fifr."7; and, Fig.J 9 a'sideview of a detail ofthe construction shown in Figs. f? and 8.

In the 'accompanying drawings, I have shown at a' the main steam supply pipe of a steampdri Jen turbine. said pipe being provided with the usual valve [control device a2, and at o. I have vshown the casing in which the rotor b2 is4 mounted, said rotor being mounted on and secured to a shaft b3 having a supportingframe shown, or f. partrllfyshown at c, and on which is mounted and to which lis secured a valve casing d.

y The rotor b2 is provided with pockets b* which may be of the usual, or any preferred form, and the frame c is provided with a head c2 on which the valve casing Z rests, land said valve casing (Z is cylindrical in form and the bottom thereof is provided witlrports or passages cl2, three of which are shown and which communicate with corresponding ports or passages c3 in the head 02. of the frame c, and the ports or-passages 03 are L-shaped inform, as shown inl Fig. 1,

and discharge into the pockets b* of the rotor through tangential discharges c in a plate c5 secured in the face of the-head o2, as clearly shown in Figs. 1, 5 and 6.

The steam supply pipe a is onnect'ed with one end of the valve .casing d andthe opposite end of said valve casing is provided with a stuing box [Z3 through which is passed a valve shaft e provided at its outer end with a gear e2 which meshes with a vertically arranged rack bar e3, the lower end of which is provided with a shaft e* which passes into the cylinder e5 of an ordinary steam pump device and is provided witha piston 6.6 movable in said cylinder, and the cylinder"v 0.5 is provided with the usual valve casing f supplied by a pipe g which leads to and communicates with the vmain steam supply pipe at g2, and the valve casing f is also provided with a discharge pipe g3.

The steam pump deviceinvolving the cylinder e5 and its connectedparts forms no part of my invention and any suitable device of this'class'may be employed.

The valve casing f is provided with a. main steam passage f2 with which the pipe g communicates and, with supplemental steam passages]3 and f4 which communicate with the cylinder e5, and said passages jf? and f* are placed in communication in the usual manner, and said comi'nunication is controlled by a valve shaft .5. which passes into the casing f and is connected at its Vouter end with an operating lever i having a forked head 2 which operates iuvcounection w1th a sleeve 3 forming party? a governor z mounted on a vertically arranged shaft 5 and provided with a: gear ai which meshes with another gear 7 on the rotor shaft b3.

The valve shaft e which passes into the' and at its inner ond 'with l`its opposite sides with transverse i isprovided Within a hearing c, a said shaft is provided at intervals and on valve casing of vwhich are shown, but any desired number of which may be employed'.l it l :ingiun-l derstood that this is also true of the ports ,or passages Z2 and c3 which are controlled 'by the valve devices 7c, the faces of the valve devices 7c' are provided with pockets 7:2 and 7:3, and the valve devices 7c, or the faces thereodec'rease in dimensions circumferentially from right to left, or in the direction of the steam supply pipe a, and the oliiect of this construction is to control or increase or decrease the supply of steam to the rotor according to conditions under which said rotor is Working` and one object of the pockets it? and lf3 in the faces of the valve .devices is to reduce friction between said valve devices and the Walls of the valve easing d which they operate.

` lt will beundcrstood that in the operation of this'device, the valve shaft c oscillates only through about a quarter of a revolution and the inner wall ci the valve casing d in connection with which the valve devices i; operate is provided with grooves 'a through which the steam is free to pass and through which steam is admitted to the pockets' 17.52

and 7c3 in the valve devices 1, and the ohject of this construction is to reduce the force of the springs 'm and to cause less friction hetWeen the valve devices and the wall or Walls of the valve casing (Z. I In starting the engine the valve devices' are in the position shown in Fig. S and the ports or passages (Z2 are open, and the steam is admitted directly to the rotor and the op` eration of the rotoris controlled by the governor-z't. It' the speedof therotor increases from anyA cause beyond' a predetermined or the desired point, the shaft e is turned so that the valve devices /t' mill gradually cutol" the supply of steam and, of course, the

increase or decrease of the lead under which "the engine i's working will automatically produce the same result, and in this Wav the steam supply is automaticallv conti lied under all conditions7 and said supply iis `gradually increased or decreased according to the conditions under which the engine' is Working. and in this Wag a uniform operationroit'ne engine is produced under all con incasso ditions and Without `iolt, or jar, the steam supply `being gradually and automatically increased, or gradually and automatically decreased according .to the load, or other deiansls placed upon the engine.

it must be borne in mind that the steam is discharged through the ports or passages 03 into or onto the rotor at dilierent points in its perimeter', and any desired number of the said ports or passages and the valve devices /t may be employed and 1n this way the iiuniher of ports o r. passages discharging this arrangement 'of said ports or passages is also not necessary, and various changes in and modilcations of the construction forming a basis of this invention, as herein shown and described, -may be made Within the scope of the appended claims without departing from the spirit of said invention or sacrificing its advantages.

Having fully described my invention, what Lclaim as new and desi-re to secure by Letters Patent, is

A valve controlling device for steam turbine engines, comprising a cylindrical casing one side of which is provided With a 'plurality of longitudinally arranged ports or passages, and a valve shaft mounted in said casing and provided with radially arranged and radially movable valve devices adapted t-ocontrol said ports or passages.

2. A valve controlling device for steam turbine engines, comprising a cylindrical casing one side of Whichis provided with a plurality of longitudinally arranged ports or passages, and a valve shaft mounted in said casing and provided with radially arranged and radially movable Valve devices adapted to control said ports or passages and the bearing surfaces of which are of different circumferential dimensions.

3. A valve controlling device for steam turbine engines, comprising a cylindrical casing provided with a plurality of ports or passages, and a valve shaft mounted in said casing and provided with a plurality of.A valve devices controlling said ports or pas,- sages and whereby said ports or passages may 'ce gradually opened or gradually closd, said valve devices being radially movable and being operated in one direction by springs.

4. A valve .controlling device for steam turbines. comprising a cylindrical casing provided with a plurality of ports or passages, a valve shaft mo'unted in saidl casing, automatic means for giving said shaft a rotary Oscillating movement, said shaft being I0 provided with a plurality of ports or passages, a valve shaft mounted in said casing,

reduced'at intervals to form Webs, and valve devices mounted on and radially movable on said Webs and-adapted to control said ports or passages. v

y5.,Al valve'fccfntrolling device for steam turbines, comprising a cylindrical casing automatic means for giving said shaft a rotary oscillatingmovement, said shaft being reduced at intervals to form Webs, valve devices mounted on and radially movable on said Webs'and adapted to controlsaid ports or passages, and springs placedin said Valve RICHARD R. DEF-FERTE.

Witnesses: y C. MULREANY,

H. E. THOMPSON.

Images