US1362497A - Turbine-driven set - Google Patents

Description

W. J. A. LONDON.

TURBINE DRIVEN SET.

APPLICATION FILED SEPT. 13. 1917.

Patented Dec. 14, 1920.

Inventor: William Jfl London,

H isaqttorney.

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ITED STATES PATENT OFFICE.

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

TURBINE-DRIVEN SET.

Specification of Letters Patent.

Patented Dec. 14, 1920.

Application filed September 13, 1917. Serial No. 191,144.

certain new and useful Improvements in Turbine-Driven Sets, of which the following is a specification.

The present invention relates to turbine driven sets, and more particularly turbogenerator sets.

The primary object of the invention is to provide an improved structure in such sets wherein the overall length is decreased, and a strong, rigid structure is provided.

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 drawing, Figure 1 is a longitudinal sectional view of a turbo-generator set illustrating my invention, and Fig. 2 is an irregular cross-section of Fig. 1, taken in two planes and with certain parts broken away.

Referring to the drawing, 5 indicates an elastic fluid turbine, a portion of the exhaust head only being shown, and 6 indicates an electric generator comprising a field frame 7 carrying a stationary winding 8 and a rotor 9 carried by the shaft 10. The field winding is provided with ventilating ducts 11, and on the shaft 10 is a fan 12 which sucks air through an inlet conduit 13 and discharges it to a chamber 14 from which it flows over the generator windings and through the ducts 11 to cool the generator. The exhaust head of the turbine comprises a discharge conduit 15 cast integral with which are two spaced supporting partitions 16 and 17 upon which is located a bearing 18 for the turbine shaft 19. The partitions 16 and 17 support the bearing 18 a suitable distance above the conduit 15 and form under and around the sides of the bearing a ventilating passage 20, which passage is connected by a pipe 20 to the chamber 14 on the discharge side of the ventilating fan 12. By this arrangement a certain amount of air is taken from the chamber 14 and discharged through the ventilat ng passage 20 to cool the bearing. The bearing is fastened in position by bolts 21 which screw into lu s 22 cast integral with the exhaust head. The turbine casing is connected to the generator frame by angle bars 23. In

the present instance three are shown. They are preferably cast integral with the exhaust head of the turbine and with a ring 24 which is bolted to the generator, as inclicated at 25. These bars form a rigid connection between the two elements of the set. 26 indicates a packing for shaft 19 where it passes through the turbine casing, and 27 a coupling connecting shaft 19 to shaft 10. 28

is a pocket formed in the exhaust head which receives oil leakage from the bearing 18 and 29 is a drain leading from pocket 28 to the lower angle bar 23 from which the oil drains out through an opening 30.

By the above described arrangement it .1

will be seen that the bearing 18 is brought up close to the turbine casing, being supported on the exhaust. head thereof, and that it is prevented from being unduly heated thereby by reason of the arrangement for circulating cooling air around it, between it and the exhaust head. Furthermore, the provision of cooling air for this purpose involves no additional expense or complications, as the supply is drawn from 6d a source already available and required in connection with the generator. This makes a very compact and advantageous arrangement wherein the parts are brought close together to decrease the overall length to a minimum.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention to ether with the apparatus which I now consider to so a turbine having an exhaust head, a bearing supported on the exhaust head and spaced therefrom to form a ventilating passage between the bearing and the exhaust head, and means forming a conduit which connects such ventilating passage to the discharge side of said fan wherebv a portion of the air available for cooling the generator will be utilized for cooling said bearing.

2. In a turbine driven set. the combination of a driven machine having a ventilat- 11 ing fan, a turbine having an exhaust head the outlet portion of Whichprojects axially beyond the confines of the casing, said exhaust head being rigidly connected to the casing of the driven machine, a bearing supported on and directly over the projecting portion of said exhaust head and spaced therefrom to form a ventilating passage, and a conduit which connects the discharge side of said ventilating fan to the ventilat- 10 ing passage.

In Witness whereof, I have hereunto set my hand this 10th day of September, 1917.

WILLIAM J. A. LONDON.

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