US1061737A - Elastic-fluid turbine. - Google Patents

Description

G.- FORNBR.

ELASTIC FLUID TURBINE. APPLICATION FILED 1110.36, 1911.

1,061,737,. Iatnted. M21 13, 1913,

' InventQr; OFQ Farmer;

UNITED STAQI ZiQETEfiT OFFICE ,j

GEORG FORNER, or BERLIN, GERMANY, assreuon 'ro GENERAL ELECTRIC comm, A. CORPORATION or NEW YORK.

ELASTIC-FLUID TURBINE.

To alt whom. it may concern:

Be it known that I, Gama: Fonxsn. a subject, of the King of Prussia, residing at Berlin, Germany, have invented .certain new and, useful Improvements in Elastic- Fluid Turbines, of which the followingis a specification.

The present invention relates to elasticfiuid turbines, and more especially to those of the reaction type, and has for its objectto provide a simple and effective means for receiving and conveying the steam that leaks through the packings or st-ulling boxes, back into't-he turbine or some part thereof. 'hen the steam is allowed to escape to the atmosphere either directly-1 or indirectly through long pipes as is customary with reaction tnrbines. such steam is lost as is also the latent heat thereof. The escaping steam also-causes condensation of steam on the turbine casing.

In the accompanying drawing which is illustrative of my invention, Figure 1- is a view in side elevation of a turbine showing a. live steam ejector means for reducing leakage; Fig. 2 is a similar view of' a modified form of the invention showing a stage pressure ejector means for reducing leakage, and Fig. 3 is a detailed view showing a typical form,of ejector.

, 3 indicates a multi-stagc-reaction turbine of any suitable type and construction. My invention is, however, applicable to turbines operating on the impulse plan, as the Curtis for example.

4 indicates the shaft that carries the rotor of the turbine. Atthe point where it projects. through the casing 5 st-utling or packing boxes 6 and 7 are provided. Connected to t he chambered parts of the boxes are pipes 8 and 9. These pipes are connected to the casing of an ejector 10 of any suitable type. The live steamfor operating the ejector is received from the main 11 admitting steam to the turbine, and is subjectto the control of throttle valve 12. The exhaust. steam from the ejector, together with the steam and water collected from the packing boxes, is discharged into the exhaust conduit- 13 of the turbine. This may be the final exhaust of the turbine or only the exhaust of one part, in which case the steam from the. ejector is made to do useful work in, those parts of the turbine operating at lower pres- 5 sure. It. is evident that the snction-ctl'cct Specification of Letters Patent. Application filed December 20, 1911. Serial No. 666319.

the pac (mg boxes. t'hevalve 15.. either by hand or automatically, the suction effect of the ejector may be PatentedMay13,1913.

of the elicctor will draw leakage steam from I By'properly adjusting the high pressure end of the turbine, said steam being conveyed by the pipe 15 under control of a hand or automatic valve 16, The exhaust from the ejector passes into the exhaust conduit 13 or into some low pressure stage from which point it performs useful work in the turbine. Leakage from the packings is conveyed by the pipes 8 and 9 to the "ejector, said pipes being united in the coupling 17. In this case as before the suction effect of the ejector is so regulated, as by adjusting the valve 16, that the outflow of steam from the stufiing box is avoided as much as possible. This arrangement. has the advantage that no live steam is required for the operation of the ejector, any steam that enters the pipe 15 has of necessity leaked pastsome portion of the packing.

lt .will be seen that the ejector constitutes a pump for drawing otl leakage steam from the pat-kings. and that the amount so drawn oli' is just snllicient to prevent steam from escaping from the packing on the one hand and the entrance of air on the other. The control is ideal in its simplicity, and as the steam flow is small the cost is small. Since the control is so complete it becomes unnecessary to take down or inspect the packings as often as formerly.

In accordance with the provisiousof the patent statutes. I have described the principle of operation of my invention, together with the apparatus which I now-consider to represent the best einbmliment thereof; but; I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

'\\'hat I claim as new and desire to secure. by Letters Patent of the United States, is,

l. .-\n elastic-fluid turbine having a shaft and a packing therefor, an ejector that is I connected to a charnber in the packing, a

commonto and receives the leakage steamfrom the packmgs, means for supplying steam to the ejector to operate it, a regulatin means therefor, and a pipe. that conveys fluld from the ejector to a point of low pressure in the turbine.

3. elastic-fluid turbine having a shaft and a packing therefor, an ejector, a pipe 15 that conveys leakage from the packing to rom the ejector, a pipetliat conveys fluid sa 1d packing. but of higher pressure to the ejector for'actuating it, and a valve for controlling the passage of fluid through the last named pipe. I

In witness whereof, I have hereunto set my hand this ninth day of December, 1911.

I GEQRG FORNER.

Witnesses:

Enron: Unnnu'm, LUDWIGCUBELIO.

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