US1012813A - Turbine. - Google Patents

Description

P. A. CHALBIL.

v TURBINE.

7 APPLICATION 'IILED APR. 7, 1909. 1,012,813, x Patented Dec. 26, 1911.

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TURBINE APPLIOATION FILED APR. '7, 1909.

Patented Dec. 26, 1911.

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WITNE88E8 1 IIWEETOR 7 BY a. ./M 1 Maw awm ATTORNEYS TURBINE.

APPLICATION FILED APR. 7. 1909.

Patented B61126, 1911.

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WITNESSES .the nozzles B when the pressure steam and the-other B is for high pressure steam. Each kind of steam can be brought to its particular row of nozzles through annular chambers such as D and E. Both high and low pressure steam (after suitable expansion) are discharged. into the steam buckets I of the rotating wheel It which in some cases may be the only bucket member, although in thedrawing it is the first wheel of a series through which the steam passes successively. 1 v

The nozzles described above may receive steam directly from the Chambers or they may be combined with a suitable number of nozzles.

In the construction shown in Fig. 1, when the engine is using only low pressure steam,

the steam Wlll strike the first wheel in sec- .tions scattered all around the periphery; for

instance, there may be four orfive such spaced sections or segments. The jets of steam will, therefore, be discontinuous in the first Wheel and also. in some of the following wheels. In order to obviate this drawback, I may adopt a.,construction such as illustrated in Figs. 5'and 6. The stationary member S in this case has a continuous annular row of double nozzles A, B The low pressure nozzles A receive steam direct from the exhaust chamber I) and some of the-nozzles B are placed in registry with the nozzles N, which direct the live steam into the nozzles B. The nozzles N receive live steam from the conduit 0. These nozzles N do notcome quite close to the nozzles B thus leaving a free space P behind the nozzles B and allowing a certain quantity of low pressuresteam to flow freely through machine is running on low. pressuresteam. It will be seen that this method of directing steam will give a more uniform distribution in the wheel.

The special advantages of my system are as follows: It allows the utilization of the energy contained in high pressure steam without the loss involved in previously eX- panding it to the pressure for which the low pressure nozzles the two different steam pressures are brought to act on the same wheels or buckets and by means of my invention the construction of a separate group of high pressure wheels is avoided. It will also be observed that when such a separate group of high pressure wheels is used, and the turbine is run-by 'eX-' haust steam applied tothelow-pressure secpressure steam is cut off.

have been designed. The efficiency 15 not as great as in the case tion, the high-pressure section is carried along idly and a corresponding loss of power ensues. This I avoid by my invention. Furthermore, in Figs. 5 and 6 it is shown that the space P provided at the ends of the nozzles, has the cry of the stationary member when the high In this way t e entire nozzle area of the stationary memher is utilized'on low pressure work.

Various modifications may be made without departing from the nature of my invention as set forth in the claims.

This invention is also applicable to overloading turbines by means of a bypass of steam, allowing a higher pressure toreach thelower pressure stage ot thet'urbine.

Under the usual practice it is necessary to expand the steam so brought to the turbine with a consequent loss of energy. It is possible to avoid this drawback by-employing a construction of the character shown in Figs. 7 and 8 Where by opening the valve V part of the live steam from chamber T will ass to the nozzles 13 and thus reach the lbwpressure section of the turbine While the remainder of the live steam passes first through the high pressure section and then to the low-pressure section.

My invention- 1s of particular value in connection with turbine boats when run at slow speed with a reduced flux of steam, the provisionof special cruising turbines being dispensed with.

efiect of allowing the low periph;

In each of the constructions shown, it is I intended that all the rotary members or wheels should be secured rigidly to a single shaftfalthough this is not absolutely essential in all cases.

While I have spoken high pressure steam and of low-pressure steam, it should be well understood'that this refers only to [the initial condition ofthe steam, and that both kinds of steam have practically the same pressure when they reach the buckets.

I claim as my invention:

1. A turbine comprising a rotary member having buckets, separate stationary nozzles located in the same plane transverse to the axis of rotation, said nozzles being of diilerent construction to work efiiciently ,with

steainof different pressures, and additional higlrpress'ure nozzles located in a ditl'erent plane and arranged to discharge 'steaininto some of the first-named nozzles. v I U 2. A turbine comprising a rotary member having buckets, separate stationary nozzles located in thesame plane transversieto the axis of rotation, said nozzles being of different construction to work efiicientlywith steam of ditlerept pressures, a low-pressure 1,012,813 I I I r r a channel eommunicatingwith all of said no zmy hand in the presence of two subscribing zles, and additional high pressure nozzles Witnesses. located Within said channel and arranged to discharge steam into nozzles of the first PAUL ALEXIS H 5 named set which differ construction from Witnesses: the other nozzles of szidset ELLWoon AUs'rIN' WELSEN,

In testimony whereof I have hereunto set ALBERT NUNES.

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