USRE14370E - By westing - Google Patents

Description

J. LE C. DAVIS. DECD.

WESTINGHOUSE ELECTRIC AND MFG.. COMPANY, ASSIGNEES.

DYNAMD ELECTRIC MACHINE.

APPLICATION FILED MAY 4. 1915.

Reissued Oct. 2

ATTORNEY I UNITED STATES PATENT OFFICE.

JOSEPH LE 0. DAVIS, DECEASED, I-JATE or PITTSBURGH, PENNSYLVANIA, BY WESTING- HOUSE ELECTRIC AND MFG. COMPANY, ASSIGNEES.

" DYNAMO-ELECTBIC MACHI E.

Specification of Itei'ssued Letters Patent- Reissued Oct. 2, 191 '7.

OriginalNo. 1,115,406, dated October 27, 1914, Serial No. 703,632, filed June 14, 1912. Application for reissue filed May 4, 1915. Serial No. 25,839.

I '0 all whom it may concern:

Be it known that JOSEPH Ln G. DAVIS, deceased, late of Pittsburgh, in the county of Allegheny and State of Pennsylvania,

' during his lifetime invented certain new and useful Improvements in Dynamo-Electric Machines, and that the WESTINGHOUSE ELEC- TRIO AND 'MANUFAGTURING COMPANY, a corporation organized and existing under the laws of Pennsylvania, assignee of JOSEPH LE C. DAVIS, now deceased, hereby declares to the best of its knowledge and belief that the following specification, taken in connection with the drawings furnished and forming a part of the same, is a clear, true, and complete description of said improvement.

My invention relates to dynamo-electric machines, and it has special reference to the ventilation of motors of the railway type and similar machines which are liable to become overheated in service. v

One of the objects of my invention is to provide a machine of the class above indicated that shall embody simple-and eflicient means for effectively preventing the over heating of any of its parts under difierent conditions of operation.

Another object of my invention is to provide an electric motor'of the inclosed railventilation through the agency of a suitable fan. that is associated with its armature and which, moreover, shall embody simple and adequate means for converting the motor from an externally ventilated machine to an internally ventilated structure, or vice versa, in order to meet different conditions of operation.

Still another object of my invention is to provide a convertible railway motor of the class referred to, the parts of which shall be so arranged and constructed as to permit of adapting the motor for either form of ventilation with comparative ease and a minimum of expense and number of parts.

I am aware that fans and other similar devices have formed parts of the rotatable members of dynamo-electric machines, but, to my knowledge, such machines have not been provided hitherto with convertible means adapted to produce either an entirely local circulation of ventilating air within the frame of an iaclcsed mete o im ar way type that shall be adapted for forced machine, or a circulation of air from outside of the framethrough a suitable inlet opening, around and through the heated parts 'of' the machine and out at another point. 1

According to mypresent invention, I rovide a structure having the above specified characteristics which are of special values in motors of the railway type.

v Figurel of the accompanying drawing is a view, partially in section and partially in side elevation, of a railway motor embodying my invention. Fig. 2 is a fragmentary view, corresponding to a portion of Fig. 1, illustrating the reversible deflector shown in Fig. 1 as occupying a different position, and Figs. 3 and 4: are detail views of the damper or grid which is shown in Fig. 1.

Referring to the drawing, the machine here shown comprises a stationary frame 1, having field magnet coils 2 mounted upon polar projections 3, bearing housings 4 and 5, an armature 6 having a laminated core member 7 a winding 8, a commutator cylinder 9 and a shaft 10.

The armature 6 is mounted upon the shaft 10 which is rotatively supported in bearings 11 and 12 that are respectively carried by the bearing housings 4 and 5.

The frame 1 substantially incloses the polar members 3 and armature 6 and is pro-V vided with end outlet openings 13 and 14 through the housing 5, openings 15 and 16 which are closed by commutator covers 17 and 18, and an inlet opening 19 through which cool ventilating air may be admitted to the interior of the frame 1.

The laminated core member 7 of the armature is provided with longitudinal passages 20, and a spider 21, upon which the commutator cylinder 9 is mounted,is provided with passages 22 to register with the passages 20.

A deflector ring 23 is mounted on the shaft 10 adjacent to the bearing 11, and a combined fan and deflector 24 is mounted on the shaft 10 adjacent to the bearing 12.

An annular deflector or bafile 25 is remov-' ably secured within the frame 1 and to the housing 5 by means of bolts 26, and is adapted to be detached and reversed in position, if desired, to direct the circulationof air created by the fan 24, when the motor is in operation, eith r e t a d y thrsm the lation of air within the casing or an open circulation through the inlet and outlet openings. V T

5. An electric motor comprising a substantially closed frame having, relatively small inlet and outlet openings, a rotatable armature, a fan carried thereby, a reversible deflector secured to the stationary frame for directing the circulation of air produced by the fan, and an adjustable damper for closing and opening the inlet in the frame. 1

6(An electric motor. comprising a substantially closed frame having relatively small inlet and outlet openings, a rotatable armature, a fan carried thereby, a reversible deflector secured to the sta'tionary frame for directing the circulation of air produced the fan, and an adjustable damper for closing and opening the inlet in the frame according to the position occupied bythe deflector. i

7. A dynamo-electric machine comprising relatively rotatable members, a substantially closed casing, means for creating a circula tion of air as the machine operates and means for adapting said" machine for eX- ternal or for internal ventilation.

8. A dynamo-electric machine comprising relatively rotatable members, an inclosing casing therefor, means for creating a circulation of air as the machine is operated and means for converting the machine into eithe'ran internally ventilated machine ori an externally ventilated machine.

9. In a dynamo-electric machine, the combination with relatively rotatable members, a frame substantially inclosing said members, and a fan associated with the rotatable member for creating a fluid circulation as the machine is operated, of means for adapting said machine for internal ventilation or for external ventilation.

10. In a dynamo-electric machine, the combination with relatively rotatable members, a frame substantially inclosing said members, and a fan associated with the rotatable member for creating a fluid circulation as the machine is operated, of means for directing the circulation of fluid either in a closed circuit within the frame or in an open circuit from the outside atmosphere through the frame and including passages in the stationary and rotatable members of the machine and openings in the inclosing frame.

11. In a dynamo-electric machine, the combination with relatively rotatable members, a frame substantially inclosing said members and a fan associated with the rotatable member for creating a fluid-circulation as the machine is operated, of adjustable means for directing the circulation of fluid either in a closed circuit within the frame or in an open circuit from the outside atmosphere through the frame.

12. dynamo-electric machine compris ing a stator, arotor, an inclosing frame having openings therein, means associated with said rotor for creatinga circulation of air when the machineis operating, and; adjustable means for directing the circulation of air either in a closed circuit within the frame and includingpassages inthe stator and the rotor or' in an open circuit from the outside atmosphere through said and openings in said frame. a

- 13. In a dynamo-electric machine, the combination with a stator, rotor, and a frame substantially inclosing said parts and having openings in one [end thereoffof means for creating a circulation of air when the machine is 1 operating andremovable means associated with the end'of the frame passages having, said openings and disposed" interm.e

ing "longitud inal openings therein, acooperating" stationary member having longitudinal passages therethrough, and a frame for substantially inclosing said members,

one end of said frame having a plurality of' openings, of a fan associated With said rotatable member for creating a circulation of air when said member is operated, and a removable deflecting plate attached to the end of said frame and disposed therein intermediate said end openings for directing the circulation of ventilating air.

16. A dynamo-electric machine comprising relatively rotatable members, a frame substantially inclosing said members and having an end opening, a bearing housing asociated with one end of said motor and having an opening therein, a deflecting plate removably secured to said bearing housing and disposed Within said frame and intermediate the end opening of said frame and the housing opening.

17 A dynamo-electric machine comprising a substantially closed frame having relatively small inlet and outlet ventilating openings, a rotatable member, a fan carried thereby for producing air currents, a detachable deflector secured to said frame intermediate said inlet opening and said outlet opening for directing the air currents and means including said deflector for closing said inlet and said outlet openings.

18. A dynamo-electric machine comprising a substantially closed frame having in-

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