US1557051A - Railway motor - Google Patents

Description

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R. E. HELLMUND RAILWAY MOTOR Filed 00?.. 24. 1923 lsz. a if* INVENTOR Patented Oct. 13, 1925.

UNITED STATES PATENT OFFICE.

RUDOLF E. HELLMUND, OF SWISSVALE, PENNSYLVANIA, ASSIGNOR IO TESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

RAILWAY MOTOR.

Application led October 24, 1923.

To all whom t may concern.'

Beit known that I, RUDOLF E. Hamai UND, a citizen of the United States, and a resident of Swissvale, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Railway Motors, of which the following is a specification.

My invention relates to `electric railway motors and has particular relation to bipolar-motor construction.

The introduction of the ventilated motor in railway service, and the experiencc met with during snow storms, makes a railway motor having a minimum number of coils and other electrical parts, such as connect-ing leads which are subject to insulation breakdowns, especially desirable. It is also desirable to have such parts located as far away from the bottom of the motor as possible.

A bipolar motor provided with two main. field coils and a single commutating coil would serve to overcome the above difficulty but would normally require such large magnetic frame sections' as would be too heavy to employ for commercial railway opera-tion.

The principal object of my invention is to provide a bipolar-railway-motor structure to overcome the above diiculty by having a heavy magnetic section carrying the major portion of the flux on the suspension side of the frame, opposite the railway axle, and having two small m etic sections on the axle side, the motoraiiving two main pole pieces located respectively above and below the armature and a single commutating pole located on the suspension side.

Another object of my invention is to provide a railway motor wherein the gear-center distances will be reduced to a minimum, the railway axle being located partially within the interior of the motor frame, and means being provided for collecting and draining oil from the axle bearings.

A further object is to provide a railwaymotor mounting that will provide a relative ly large clearance space thereunder.

Other objects of my invention are to pro- Vide a compact, simple, practical and relatively inexpensive structure of the above class wherein the air inlet is located to the best advantage.

Vith the foregoing and other objects in view, my invention consists in the details and combinations herein described and Serial N0. 670,454.

claimed and illustrated in the accompanying drawing, wherein Figure l is a view in transverse section through the motor, on the line l-l oi Fig. 2, and

Fig. 2 is a view in longitudinal section through the frame thereof, on the liuc H-II of Fig. l.

Referring to the drawing, the niuneral l designates a wheel ot' a car truck mounted upon an axle 2, and the numeral 3 designates a transverse motor-suspension bar cari-iet by the truck.

The motor, which is geared to the axle il by the usual means7 (not shown) is shown i as a. commutator motor comprising an arma.- ture 4 mounted within suitable bearings at the ends of the frame 5 and operating between laminated pole pieces G carried, rcspectively, by the upper and lower walls T ci the frame. The pole pieces are energized by coils S mounted thereon and are so disposed that the gap between the saine and the side of the frame toward the wheel axle is less than that on the opposite or suspension side. A laminated interpole piece 9 extends from the suspension side wall l0 ol the frame and has a coil 1l disposed thereon.

Thel upper and lower walls T oi the motor frame 5 gradually decrease in cross section from the suspension side wall l() toward the opposite side wall l()n adjacent the car-wheel axle.

The frame is rigidly attached to the .snspension bar 3 by its wall l0, which is a iiai plate of uniform thickness throughout, constituting a heavy magnetic section between the poles.

The wall 10a of the frame, adjacent the car axle, is provided, at each end, with a i' bearing bracket l2, having a cap 13 bolted thereto. The wall l0:1 ou the axle side is oi lighter section than the wall l0 ou the suspension side and comprises two portions 1.4.

that terminate near the axle bearing to carry 1 the magnetic flux near the axle, the opening 15 between the portions 14 preventing excessive flux leakage from the frame to the armature. The wall lO"L also carries a sheetmetal covering 16 which extends about the. outer portion of the axle over the opening 15 to prevent the entry of dust or dirt to the frame.

To prevent the entry of oil from the axle 2 to the frame and consequent injury to the lower field coil, an inwardly and upwardly extending lip 17 is provided at the lower part of the wall 14 to extend a suflicient distance over the coil to direct the oil out through 'one or more drain openin 18.

An air inlet 19 is located in the wall 10 of the frame above the axle. To event the entrance of snow, a sheet-metal op erlike cover 19", open at the top, is attac d to the outside of the wall, also a late 20 extends across the upper part of tie vinlet to cause the air to descend to the bottom of the inlet, as indicated by the arrows 20A and 20B in Fig. 1. A transversely disposed bent plate 21 is secured within and across the inlet, leaving an open space 22 at one end thereof through which the air passes, in a horizontal direction, tol the interior motor space adjacent the commutator, as indicated by the arrow 22C in Fig. 2.

A suitable fan (not shown) may be located at the other end of the frame on the arma ture shaft to create a circulation of the air that enters the inlet opening 19.

While I have shown and described a certain embodiment of my invention, I desire that such embodiment shall be regarded as illustrative only, and that the appended claims shall be accorded the broadest construction consistent with the prior art.

I claim as my invention:

1. A bipolar railway motor comprising an armature and a field frame, the latter having two main pole members respectively located above and below the armature, means for supporting a railway axle at one side of the frame, means for suspending the frame at the opposite side thereof, and a single commutating pole member located on the suspension side thereof.

Y 2. A bipolar motor frame comprising a heavy magnetic section on the one side and two smaller sections on the opposite sidei 3. A bipolar railway motor comprising a frame having a' heavy magnetic section on the one side and two smaller sections on the opposite side and an opening between said smaller sections, and an axle disposed adjacent said two smaller sections.

4. A bipolar railway motor comprising an armature and a field frame, the latter havin a heavy magnetic section on one side thereo two smaller magnetic sections on the opposite side and a space therebetween, means for suspending said frame at the irstanentioned side, car-wheel-axle bearings at said second-mentioned side, two main pole mem'- bers respectively located above and below the armature, and a single commutating pole vmember located at the suspension side of the frame.

5. A bipolar railway motor comprising an armature and a field frame, the latter having .a heavy etic section on one side thereof, two sma r magneticstions on the opposite side and a space therebetween,

means for sus ending said frame at the irstmentioned si e, `and ineens for mounting 'a car-wheel axle'adjacent saidtwosmaller sections.

6. In combination with a railway motor frameybearings adapted to support a railway-wheel axle projecting partlally into the-1` interior motor space, andY l means' for Acols; lecting oil from ythe-axle bearing and for-discharging the same from themotor frame.

7. In combination with a railwaymotor4V frame, bearings adapted to support a railwg, y,

wheel axle and proJecting partially into@ e,

interior of the motor frameyend means for dissymmetrcally concentrating the weightj of the motor toward the side opposite said axle.

8. In combination with a railway motor .of the commutator type, means foi` mount ing a railway-wheel axle adjacent one side ot the motor, the motor frame having an opening above said axle,- a bale means for I directing air downwardly toward said opening,` and baffle means within said frame fon directing the air horizontally' toward the interior motor space near the commutator.

9. A railway motor comprising a vframe having one side mounted adyacent a railway-A wheel axle, an air inlet in said sideO;

frame above said axle, and meins for recting the air downwardly toward-` let and then transversely within said au* 10. A bipolar railway motor com riiiiga frame having ytwo main pole mem rs,o`n` located above and the other below,-each provided with a coil, a single Commutating pole member at one side thereof, and means a` the other side for supporting -a railwzg' wheel axle andfor directingoil from axle away from the lower coil.

11. A bipolar rallway motor comprisin'glffil,E

frame having a suspension means at one side and a railway-wheel axle at the ofh side, a heavy magnetic section at the spension side thereof, a com-mutater member on said section provided wit -a coil, a pair posed at the of the frame and each provided-with asaid frame having two smaller magnetic sec`- of main pole members, one diaftop and theater at eheboadm Y tions disposed on the axle side thereof, with a space therebetween and having an air inlet above said axle, and inlet for directing the incoming airdownwardly and then horizontally into" said frame.

In testimony whereof, `I have hereunto subscribed my name this 20th day of Dctcber, 1923. v

RUDOLF E.

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