US806679A - Regulating device for steam-turbines. - Google Patents

Description

- No. 806,679. i PATENTEDDEG.5,19,05.

w. KIESER.

REGULATING DEVICE FOR STEAM TURBINES.

' APPLICATION FILED MAB.17,1904.

2 SHEETS-BEBE: 2.

INV NTQ UNITED STATES PATENT OFFICE.

WALTER 'KIESER, 0F BERLIIN, GERMANY, "AssmNoa To GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

REGULATING DEVICE F R s TEAM-TuRBmEst To whori't it m ay concern: a I I Be it known that I,,WALTER K nsnn, a citi- 'Zen of Switzerland, residing'at Berlin, Germany, have invented certain new and useful Improvements in-Regulating" Devices for Steam-Turbines, of which the following is a specification. I

. My invention relates to a,governingmechanism for elastic-fluid turbines, whereby the. supply of motive fluid may be controlled by and reliable in Operation.

Incarrying out the invention a valve-casing is provided having acurved wall-0r surface.

By preference thiswalli-is' made in the form of a cylinder or segment of a cylinder.

municating with passages or conduits leading to the turbineto be governed. These ports may be arranged singly or in groups ina row extending entirely '0! partially around the wall, as desired. Cooperating with the wall is a flexible member or band fixed at onepointto a stationary part and atanother point-t0 a movable carrier, -whereby the band as it is moved toward and away from the. w'alla's,

for example, {by unrolling and rolling it-by to the turbine.- This band may be disposed I wholly or partially around the carrier, as dewithout destruction; Thearrangementof the band is such that by a'slighit rocking move; 40

. wound, thereby successively uncovering-or.

covering the. valve ports or ends'of the con.

- fduits. The-carrier may be and preferably is The carrier .is preferably a circular -disk sired, The band thus constitutes a valve and is preferably made; of a steel strip or other metal capable of standing a high temperaturement ofxthe carrier the band. is wound or unconnected-with a speed-responsive device, so

that the valve is automatically actuated to vary thenumber of nozzles or fluid-discharging devlces in service in changes in .load.

t In the accompanying drawlngs, which illus-a trate one. embodiment of the invention, Figure n 1 is a longitudinal section of. the'valve mech-j .anism and meansfor actuating-the same, and.

f Fig. 2 isa transverse section on line212,

Fig.1. 3 w

I Specification of Letters Patent. Application filed March 17,1904. semi N6. 198,68

The wall is provided with'a number ofports comaccordance with Patented. Dec. 5; 1905;

Referring to the drawings, 1 is a valve-casing of any suitable construction, which mayv be secured to the shell or other'part of the turbine. According, to the preferred construction the-' casing comprises a ring2 and heads 3 on opposite: sides thereof, which are secured together ;b ,;a number of bolts 4.,

(Shown more clearly in Fig. 2 Communicating'with the casing is a suppl-yfconduit 5,

of-the ring is cylind deal and is carefully fin:

.cast in one" of the heads. The interior'wall; Y

ished to'form'a circular valvewseat, such being a simple and satisfactory construction. 1 Extending radially through the. ring arepassages joint.

(shownclearly in Fig. 2.) which constitutes a valve for controlling communication between. the conduits Gand the interior of the casing. This band is preferably'of steel or othermetal capable of making a steam -tight Arranged within the ring and adjacent to the interior wall thereof isa flexible band 8,

having a' certain degree of resiliency arid ca:

.pable of standing high temperatures, end of the band i'sanchored to astationary part ofthe casing, while the other end is atturned into'eyes 10, which fitaround pins 11 ,secured in the wall of the casing and in the carrierl9, respectively. -.--The fixed end of the band is further secured by means-of a'plate 12, which is held by bolts 13,.extending One ' tached to a movable' carrier' The endsare through thering and screwing :intojtapped. openings in the plate. f The movable endfof the band is secured to the carrier by means ofan angular or U shaped f piece; 14', which is bolted-or. otherwise secured'to the latter. I 7

mounted to reckon its axis and is locatejdcen- .trally in the casing.j- The web of the disk is passage of fluid to both sides of the disk. The disk is keyed toa rockshaft 16, which ex- :00 provided with. openings 15 to permit the free,

tends through-one of the heads of the yal'vecasing and is supported atits outerend in an around the shaft where it enterslthe casing.

.In the present instance a stufling-box 18 is formed in the head through which the shaft extends, the same comprising the base of the arm 17 pressed sleeve 19 on the shaft, and between the outer end of the sleeve and a gland 20 is a soft packing-ring 21, which prevents the escape of fluid from the casing. Ball-bearings '22 are provided at the ends of-the shaft, one of which is arranged in the supporting-arm 17 and the other suitably housed in the valve- I casing.

The rock-shaft may beactuatedeither manually or automatically,-as desired. I prefer, however, to connect the same to the speedresponsive device, (not shown) so as'to con trol the valve automatically by variations in the speed of the turbine-shaft. For this purpose a crank-arm 23 issecured on the rockshaft and a link 2e serves to connect thesame with the speed-responsive device.

With the arrangement described a movement of the carrier-9 in a direction indicated by the arrow m, Fig. 2, causes the valve 8 to gradually wind up, while movement in the direction indicated by the arrow 02- causes the valve to gradually unwind. This winding or unwinding of the valve progressively opens or closes communication between the valvecasing and the several independent conduits, thereby admitting or cutting ofl the supply of motive fluid to the nozzles or discharge devices of the turbine. In operation, as the load increases on'the turbine the governor responding to the change in speed causes the valve to uncover more than the normal number of supply-conduits, and when the load decreases the valve is caused to close more of the conduits.

While I have described the interior wall of the valve-seat ascylindrical, it is not necessarily limited to this shape, Whatever the shape of the wall desired the general contour of the valve is preferably approximately similar thereto, so that a comparatively small movement.o'f the valve will open or close all the conduits.

In accordance with the provisi ons of the pat t ent statutes I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown general contour of the wall, and means for is only illustrative and that the invention can be carried out by other means.

. What I claim as new, and desire to s'ecu re by Letters Patent of the United States, is-

1. In a governing mechanism, the combination of a valve-casing having a curved wall, conduits extending through the wall and terminating in ports, a resilient valve having the flexing or bending the valve in a manner to open and close the ports. I

2. In a governing mechanism for elastic- VVithin the stufling-box is a springfluid turbines, the combination of a valve-casinghaving a circular wall, radial fluid-conveying conduits therein, a resilient member having 'the general contour of the wall, and means for flexing or bending the member to open or close the conduitssuccessively. h

3. In a governingmechanism, for elasticfiuid turbines, the combination of a valve-casing, a plurality of independent fiuid-conveying conduits communicating with the casing and extending outwardly therefrom, anda single flexible band-shaped valve for opening and closing. the conduits successively.

4. In a governing mechanism for elasticfluid turbines, the combination of a valve-casing, a plurality of conduits arranged in the for imparting a winding or unwinding moveconduits, and means for winding or unwinding the member t'ocover or uncover .the conduits.

6. In a governing mechanism, the combina tion of a valve-casing comprising a circular ring having passages therein, end plates or heads secured on opposite sides of the ring, and a flexible member for opening or closing said passages.

7. In a governing mechanism, the combination of a casing having a curved wall, a plurality of conduits in'the wall, a circular diskshaped carrier arranged concentric with the wall, a valve secured between the casing and elasticcarrier and disposed around the latter, and

means for actuating the carrier to move the 4 valve to uncover or cover the conduits.-

.8.- In a valve mechanism, the combination of a casing having a curved wall, a plurality' of conduits in the wall extending outwardly therefrom, a carrier in the casing, a valve extending along said curved wall and attached to thecasing and carrier, a rock-shaft upon which the carrier is mounted, and means for actuating the shaft and carrler to cause the valve to cover or uncover the conduits successively.

9. In a valve mechanism, the combination of a casing, a plurality of conduits commum eating therewlth, an arm extending laterally from the casing, a shaft supported by the arm and casing, means for rocking the shaft, and a valve adapted to be'expanded or contracted by movement of the shaft to cover or uncover the conduits.

'10. In a valve mechanism, the combination bolts for securing the heads and ring together,

a supply-circuit communicating with the casing, a circular band or-valve adapted to open or closethe conduits, a carrier for the valve, and a rock-shaft for actuating the carrier.

11. In a valve mechanism, the combination of a casing comprising'a ring having radiallydisposed conduits, heads on opposite sides of the ring, bolts for securing the parts together, a central rock-shaft, an arm formed on one of the heads for supporting the shaft, a packing aroun' the shaft, a circular resilient .band or valve for controlling the conduits, and a carrier for the valve which is mounted in the casing on the shaft.

12.. In a governing mechanism for turbines, the combination of a stationary curved wall provided with independent apertures, a flexible valve adapted to cover and close said apertures, and means for bending said valve away from said wall to successively uncover the said apertures.

13. In a governing mechanism for elastic fluid turbines, the combination ofa plurality of fluid-conveying conduits whose corresponding endsform valve-ports, a' flexible valve which is adapted to successively cover or uncover the ports, and means fox-flexing or bending the valve to controlthe'ports.

14. In a governing mechanism for elasticfiuid turbines, the combination of aplurality, of fluid-conveying conduits whose correspond-'- ingends form valveports, a valve which is adapted to successively cover'or uncover the ports, and means for. progressively flexing or bending the valve to control the ports.

15. In a governing mechanism for elasticfluidtunbines, the combination of a plurality of fluid-conveying conduits whose corresponding ends are arranged in the same surface and.

form valve-ports, and a flexible valve which is adapted to be flexed or bent toward or away from the ports ,to successively open or close the same. d l

'16. In a governing mechanism for elasticfluid turbines, the combination of a plurality of fluid-conveying conduits whose corresponding ends form valve-ports, a flexible valve an chored at one point, and means attached to the valve atanother point for progressively flexing or bending, the same to cover or uncover the ports successively.

17. In a governing mechanism for turbines, the combination of a wall provided with individ ual ports, separate conduits each connected to a port through which motive fluid passes to the turbine, aflexible valve adapted to cover and close said ports, and a means for bending the valve away from said'wall to uncover the ports.

In testimony that I claim the foregoing as -my invention have signed my name, in presen'ce of two witnesses this 24th day of February, 1904; 1

WALTER KIESER. Witnessesz' \WOLDEMAR HAUPT, WILLIAM MAYNER.

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