US1548608A - Elastic-fluid turbine - Google Patents

Description

Aug. 4, 1925.

O. JUNGGREN ELASTIC FLUI-D TURBINE Filed July 30, 1923 fnventon' Oscar- Jung Pen,

f/flsAd'orngy turbine.

Patented Aug. l, 1925.

UNITED STATES relates PATENT OFFICE.

OSCAR, JUNGGREN, OF SC'HENEGTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ELASTIC-FLUID TURBINE.

Application filed July 30, 1923. Serial No. 654,593.

To all whom it may concern:

Be it known that I, OSCAR JUNGGREN, a citizen of the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Elastic- Fluid Turbines, of which the following is a specification.

In large condensing elastic fluid turbines the exhaust head or housing becomes very large because of the large volume of elastic fluid to be handled and when such heads are made of cast iron in the usual manner they often weigh more than all the rest of the In many cases it is important to have the lightest turbine possible even for large powers, instances of such cases being when the turbines are used for driving ships, or when they are to be exported, and the object of my invention is to providean improved turbine construction wherein the exhaust head may be made comparatively light in weight. a

For a consideration of what I believe to be novel and my invention, attention is directed to the accompanying description and the claims appended thereto.

In the drawing, Fig. 1 is a side elevation partly in section of a turbine structure embodying my invention, and Fig. 2 is a sectional view taken on line 22, Fig. 1.

Referrin to the drawing, 3 indicates a turbine cas1ng divided into stages by nozzle diaphragms 4, and 5 indicates the turbine shaft on which are mounted the bucket wheels 6. The admission conduit for the turbine is indicated at 7. The turbine casing is split in the horizontal axial plane of the machine as indicated at 8, the usual flanges for bolting the halves of the casing together being shown at 9. The high pressure end of the turbine casing may be supported in the usual or desired manner, it being shown in the present instance as being supported on an oil tank 9 which in turn is carried on I-beams 9 The foregoing turbine structure is to be taken as typical of any suitable or desired structure in connection with which my invention may be used.

According to the form of my invention illustrated in the drawing, I provide an end wall 10 which forms the head for the low pressure end of the machine and connected to it by radially-extending webs 11 is a ring 12 which is bolted directly to the low pressure end of the main turbine casing 3. Preferably the end of the turbine casing is provided with a flat radially-extending surface 13 against which ring 12 fits flatwise and to which it is bolted by axiallyextending bolts 14. Ring 12 is provided with a shoulder 15 for centering the ring and when bolted up wall 10 is accurately centered and firmly fixed to the casing. Vial]. 10 is dished or curved inwardly around the shaft and formed integral with it are the packing support 16, the bearing support or pedestal 17, and the supporting foot 18. Wall 10 with the parts attached form in substance a rigid frame which is fixed as a unit to the end of the turbine casing proper. I then provide an exhaust housing 19 which may be formed of any suitable material such as sheet iron for example, and bolt this housing to the rigid frame. Exhaust housing 19 is made of a suitable form and size to meet the requirements of the machine of which it forms a part and it is provided with an opening 20 through which the elastic fluid exhausts to the condenser. The end wall 10 and ring 12 present two annular outer edges and the exhaust housing is bolted to these edges as shown in Fig. 1. The exhaust housing is split horizontally as shown at 21, the split being in line with that of casing 3, and adjacent to such split are fixed angle irons 22 which provide bolting flanges for the housing. At 23 are indicated transversely extending tie rods for bracing the housing and at 24 are indicated angle irons which are fixed to the housing to stiffen it. It will be understood that such tie rods and stiffening irons may be used as found desirable in any particular case.

The webs 11 in addition to performing the function of tying end wall 10 to ring 12 and hence to the turbine casing performs also the function of directing the exhaust elastic fluid to opening 20 and to this end they are suitably curved as shown in Fig. 2 so that the elastic fluid in passing between them. is directed toward opening 20.

By the above described arrangement, it will be seen that the exhaust housing becomes merely a wall for directing the elastic fluid to the condenser and performs no other function. It is not required to assist in supporting the machine or holding it in valignment. It may, therefore, be made relatively light in weight. Furthermore, since it performs no functions so far as the alignment of the machine is concerned,-it may be made in as many sect-ions as desired which sections may be shipped separately and welded together at the time the turbine is erected. The end wall 10, which forms in substance a part of the turbine casing proper, serves as the supporting means for the exhaust end of the machine and to keep the parts in alignment. In View of this,

any distortion of the exhaust housing occurring either during erection or operation, or any springing in the exhaust housing cannot affect the alignment of the machine.

Any suitable forms of packing structure and bearing structure may be mounted on the supports 16 and 17. In the present instance I have shown a shaft coupling at 25 and the packing indicated at 26 is carried by the flanges of this coupling and by support 16. A suitable form of bearapparatus shown is only illustrative and that the invention may be carried out by other means.

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

1. In an elastic fluid turbine, a casing, a frame comprising an end Wall, a ring and We'bs connecting them, said ring being attached to the low pressure end of the casing, an exhaust housing fastened to and carried by said frame, and a bearing support and a supporting foot carried by i said end wall.

3. In an elastic fluid turbine, a casing, a shaft, a frame fastened to the exhaust end of the casing, said frame comprising an end wall and webs which position the end wall in spaced relation to the casing, a hearing support for the shaft and a supporting foot for the turbine also carried by said end wall, and an exhaust housing of comparatively light weight attached to and. carried by said frame.

In witness whereof, I have hereunto set my hand this 27th day of July, 1923. i

OSCAR J UN GGBEN.

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