US1297878A - Elastic-fluid turbine. - Google Patents

Description

W. J. A. LONDON.

ELASTIC FLUID TURBINE.

APPUCATION FILED FEB. 6. 1918.

1,297,878.. Patented- Mar. 18, 1919.

Fig. I. v

Inventor; William Jfi. London His fitoor ney.

' having a rigid UNITED STATES PATENT OFFICE.

WILLIAM J.- A. LONDON, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ELASTIC-FLUID TURBINE.

Specification of Letters Patent.

Patented'Mar. 18, 1919.

Application filed February 6, 1918. Serial No. 215,573.

To all whom it may concern Be it known that I, WILLIAM J. A. LON- DON, a subject of the King of Great Britain, residing at Springfield, in the county' of Hampden, State of Massachusetts, have invented certain new and useful Improvements in Elastic-Fluid Turbines, of which the following is a specification.

The present invention relates to elastic fluid turbines and especially turbine driven sets in which the turbine casing is connected to the casing of the driven machine by girder members, the Whole forming a set frame construction.

The object of my invention is to provide an improved structure in a set of this character, and for a consideration of what I believe to be novel and my invention attention is directed to the accompanying specification and the claims appended thereto.

In the drzgwing, Figure 1 is a top plan view of a turbine set or installation embodying my invention; Fig. 2 is an end view taken on line 2-2, Fig. 3, and Fig. 3 is a side elevation partly in section and with parts broken away.

Referring to the drawing, 5 indicates an elastic fluid turbine and 6 a driven member, for example a generator. The shaft 7 of the turbine is supported in bearings 8 and 9 and carries bucket wheels, as indicated at 10. The low pressure end of the turbine is shown as having a conical shaped casing 11 which is split horizontally and which may terminate at the last stage wheel. The turbine casing and the casing of the driven member 6 are rigidly connected to each other by girder members 12, two such members being illustrated. These are preferably formed integral with the headhaust housing. The surrounding portion 16.

of the exhaust housing is preferably formed in two halves, being split horizontally at the axis of the turbine shaft, and it is fastened to it a flange 22 gether comprise braced by rods orbars 20 to give it strength and rigidity. The portion 19 of the ex haust housing is formed as an integral part of the girder members 12 and is fastened to the portion 16 by bolts 21. At its central portion it surrounds the shaft 7 and has on the packing casing 23. 24 is a supporting foot for the turbine and 25 is a box girder structure for strengthening it. Surrounding the body of the turbine is a casing 26 between which and the turbine casing is packed suitable heat insulating material 27 It will thus be seen that the exhaust housing is formed as a separate element which is attached to the turbine casing proper and comprises essentially two portions, one which surrounds the exhaust end of the turbine casing and is formed in two parts, and another which forms an end wall and is also formed in two parts, one integral with each girder member 12. In other Words, the exhaust housing and girder members, to-

four castings. This arrangement has the advantage that the patterns for casting these four parts are of a relatively simple character and the shape of the castings is such that all the surfaces requiring finishing are readily'accessible and the finishing work can be performed on a boring mill. Furthermore, although the assembled exhaust housing may be large, the machine work can be performed on a relatively small boring mill.

Since the exhaust housing is a structure separate from the turbine proper and attached thereto, it will be seen that by very simple changes in the location of the sup porting foot on the exhaust housing, the exhaust opening may be made to face in any desired direction. The structure is thus adapted to permit of slight changes in the exhaust housing structure at a minimum expense. Also the same exhaust housing patterns may be adapted for turbines of different size.

In accordance with the provisions of the patent statutes, I have described the prinmeans.

What I claim as new and desire to secure by Letters Patent of the United States, is;

1. in a turbine driven et, the combination or a turbine casing, a driven machine having a casing, girder rnennbers connecting said casings, together, and an exhaust housing comprising a main part which surrounds the low pressure end of aid turbine casing and is fastened thereto, and an end portion, said end portion being formed of Wall members carried by said girder members and fastened to the main portion of the exhaust housing.

2. in a turbine driven set, the combination of a turbine casing, an exhaust housing surrounding the low pressure end of said casing and boited directly thereto, a driven machine having a casing, and girder members connecting said casings togethen'an end portion or said exhaust housingbeing formed by Walls which are integral with said girder members and are fastened to the remainder of the exhaust housing, whereby such end portion of the exhaust housing may be cast as a part of the girder mem' v here.

3. In elastic fluid turbine, the combination of a turbine casing, an exhaust housing Wail surrounding the same and split axially into two parts, said Wail Ibeing fastened at one end to the turbine casing at a point spaced from the low pressure end thereof and open at the other end, and a Wail which surrounds the turbine shaft and ifOlTi'lS a closure for said open end.

1-. In a turbine driven set, the combination of a turbine having a casing, a driven machine having a casing, girder members connecting said casings, a wall which is split axiaiiy and surrounds the low pressure end of the turbine casing to form an exhaust chamber, said Wail being fastened to the turbine casing at one end and being open at the other end, and Walls carried by said girder members which close said open end.

In Witness whereof, "I have hereunto set 1st day of February, 1918. LLIAIa i J. A, LQNDUN.

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