US1325135A - baumann - Google Patents

Description

K. BAUM ANN.

STEAM TURBJNE.

APPLICATION FILED FEB. 18. 1.918.

1,325, 135 Patented Dec. 16, 1919.

3 SHEETS-SHEET E&

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INYENTOR' 3 t' -nw K. BAUMANN.

STEAM TURBINE.

`APPLcAToN HL ED 28.18, 1918.

1 ,325 1 3 5 Patented Dec. 16, 1919.

3 SHEETS-SHE ET 2.

INVENTOR mmm. Y k Chit STEAM TURBINE.

APPLICATION FILED FEB. 18. 1918.

'3 SHEETS-SHEET 3.

18 M F'g.5.

fl 4 10 h INVENTOR RMBMMM Patnted; Dec. 16, 1919.

'UNITED ST'ATES PATENT OFFICE.

Kam. BAUMANN, or URMSTON, ENGLAND, ASSIGNOR TO THE nursn wnsTINGHoUsE ELECTRIC AND MANUFACTURING COMPANY LIMITED, A COMPANY onennar BRITAIN.

srnAvLrURnINE.

Specification of Letters Patent.

Application filed February 18, '1918. Serial No. 217348.

To aZZ whom z't may cncm Be it known that I, KARL BAUMANN, a citizen of the Confederation of Switzerland, and a resident of Urmston, in the county of Lancaster, England, -have invented a new and useful Improvement in Steam-Turbines, of which the following isa specification.

This invention relates to steam turbines and more especially to removable nozzle boxes employed in such .turbines for admittin steam to the first row of moving blades.

bi ne. The openings in the cylinder may be restricted to approximately the size of the port openings necessary for the admission of 'steam to the nozzle boxes and thusreduce weakening of the cylinder arising from the openings to a minimum.

In the accompanying drawings Figure 1 is a sectional View through the high pressure end of-a turbine cylinder having two nozzle boxes constructed in accordance with` this inven'tion located therein. Fi 2 is a part similarview showing a mod' ed construction of nozzle box, Fig. 3 being a sectional view on the line III- III ofFig 2. Fig. t is a sectional View similar to Fig. 1 showing another form of nozzle box. Fig. 5 is a view similar-to the lower half Fig. 1 illustrating an alternative' method ofsupporting and guiding the nozzle box in position, Fig. 6 being ,a sectional View on the line VI-VI of Fig. 5.

-Referring to Fig. 1, the nozzle box 7 is formed, as shown', as a curved hollow chamber closed at its ends and having a steam inlet 8 located at an intermediate point along its length. The inlet 8 is provided with a fiange 12 b means ofi which the nozzle box 7 is secure within the cylinder 10, in such a position that said inlet regsters with a steam admission port in-the side of the turbine cylinder 10,`a'nd a steam supply pipe- 11. The bolts 13, by means of which the fiange 12 is attached to the turbine cylinder 10, are preferably arranged as shown so Patented nec. 16, wi e'.

that the joint between theginlet 8 of the nozzle box and the turbine cylinder 10 can be tightened from the ext riorof the. turbine cylinder. I

Guides for maintaining the nozzlebox 7 in its proper position within nrbine cylinder with respect to the moving blades are provided at either end of the nozzlej box 7 each comprising a lug 1& on the-nozzle box furnished with a pin 15 adapted to slide within a projection 16 on the turbine 'cylinder. Said guides are so arranged that the'axes of the pins 15 are di ected toward the inlet 8 which is attached to the cylinder 10 and permit of free movement of the nozzle box due to expansion taking place in either direction from the inlet 8. As shown', the guiding means 14:, 15 and 16 onlypermit movement of the nozzle box to take place in a plane substantially perpendicular to the turbine axis so that the relative position of the nozzles in the nozzle box 7 with respect to the moving bl'ades with which said nozzles' coperate will be constantly maintained a uniforn.

The nozzle box 7 in the lower half of Fig. 1, is similar to the nozzle box located in the upper half of the turbine cylinderexcept that the inlet 8 is placed 'nearer one end of the boxthan the other in order that the admission port 9 and. steam' pipe 11 may be located in a convenient part of the turbine cylinder. With this arrangement the guidjing pin 15 which slides in a lug -17 on the nozzle box 7 may Conveniently be inserted, as shown,`through .the cylinder Wall 10, with its axis directed toward the inlet 8 by whichthe nozzle box is attached to the cylinder.

In' Figs. 2 and 3 a nozzle box is shown similar to that illustrated in theupper part of Fig. 1 except that the inlet 8 is' adapted to register with a steam admission port 9 1o cated in the end of the cylinder 10. J

The nozzle 'box shown inFig. is in the form of a hollow anulus having a single steam inlet 8 secured to the steam admission pipe 11, the latter being bolted 'to the turbi-ne cylinder 10. i 4

Instead 'of securing the nozzle box in position within the cylinder by means of its steam inlet, as shown in Figs. l to 4, the' nozzle box may be attached to the turbine cylinder as illustrated in Figs. 5 and 6. 'by a lug 18 formed on or secured to the nozzle box and bolted to a boss 19 formed on the cylnder 10. Where this method of attachment is employed the steam inlet 8 to the nozzle 'box is Conveniently arranged to slide within a prolongation of the steam admission port 9. In this way movement of the nozzle boX7, due to expansion, may take place and the provision of a guide or guides, such as are shown in Figs. l to 4, for maintaining the nozzle box in its proper relative position in regard to the moving blades, is rendered unnecessary;

I claim as my invention:

1. In a steam turbne of the parallel flow type, a curved hollow steam chamber having an admisson port registering with the turbine inlet port and means constructed so as to support said steam chamber in positiron within the turbine casing in such manner that it is allowed free movement for expansion and contraction independently of the turbine casing.

2. In a parallel fiow steam turbine, a removable nozzle box formed as a curved hollow chamber having an inlet port at an intermediate point along its length and adaptsteam turbine having an inlet for steam, a

removable nozzle box formedin the nature of a curved hollow chamber having a steam inlet at a point intermediate its ends and located entirely within the turbine casing, and supporting means for said nozzle box constructed and arranged to .permit free movement thereof due to eXpanson in either direction from the steam inlet 4:. A structure as claimed in claimv in which the supporting means includepins, the aXes of which are directed toward the steam inlet.

In testimony whereof I have hereunto subscribed my name this fourth day of J anuary, wi t&

KARL BAUMANN.

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