US967240A - Coil-supporting structure for dynamo-electric machines. - Google Patents

Description

J. T. ROBERTS. COIL SUPPORTING STRUCTURE FOR DYNAMO ELECTRIC MACHINES. APPLICATION FILED NOV. 6, 1908.

967,240. Patented Aug. 16,1910. v

MJZM UNITED STATES PATENT oEiuoE.

JOSEPH T. ROBERT S, OF WILKINSBUEG, PENNSYLVANIA, ASSIGNOR, BY MESNE AS- SIGNMENTS, T WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, OF EAST PITTSBURG, PENNSYLVANIA, A. CORPORATION OF PENNSYLVANIA.

COIL-SUPPORTING STRUCTURE FOR DYNAMO-ELECTRIC MACHINES.

Specification of Letters Patent.

Patented. Aug. 16, 1910.

Application filed November 6, 1908. Serial No. 461,324.

To all whom it may concern:

porting Structures for Dynamo'Electric Machines, of which the following is a specification.

My invention relates to dynamo-electric machines, and it has for its object to provide improved means for supporting the armature coils of turbo-generators and similar machines which operate at high speeds and have comparatively heavy windings.

In turbo-generators in which the armature windings are usually composed of large heavy coils and comparatively few poles are required on account of the high' speed of operation, the parts of the armature coils which are not included in the core slots must be securelybraced in order to prevent distortion and damage in case the armature is short-circuited.

According to my present invention, I provide supports which are adapted for use with armature windings having coils of the diamond type and comprise, in general, a plurality of radial arms or brackets which are secured to the end frame of the armature and carry, baflie plates or deflectors which cooperate with a fan carried by the'rotatablc member of the machine to improve the ventilation of the windings and core structures.

Figure 1 of the accompanying drawings is a sectional elevation of one end of a dynamoelectric machine embodying my invention, and Figs. 2 and 3 are detail views of parts of the supporting structure shown in Fig. 1.

Referring to the drawings, the device illustrated comprises a stationary frame 1, a substantially cylindrical core member 2 supported thereby, a winding 3, a rotatable member I and end bells 5 (only one of which is shown) that are secured to the ends of the frame. The winding comprises a plurality of coils of diamond type, the end-connecting portions of which are bent slightly in an outward direction in order to permlt them to be suitably supported without interfering with the removal of the rotating part.

A plurality of brackets 6 are disposed at not only winding supports, but also.

intervals about the end frame of the sta tionary core member to which they are secured and from which they extend outwardly in a direction parallel to the axis of the machine. The inner surfaces of the brackets (flare cylindrically disposed close to the outer cylindrical surfaceof the armature coils. Removable extensions 7 are secured to the outer ends of the brackets 6 and are so formed as to project into the hollow drum formed by the end portions of the coils. An annular baflle plate 8 is secured to the brackets G by means of bolts 9 and divides the space within each end bell into two chambers, a similar plate 10 being secured to the inner ends of the bracket extensions 7 The plate 8 extends to the walls of the end bell, except at the bottom of the machine, where it stops at the floor line, and a cross-plate 11 is provided to close the inner chamber of the end bell. The inner chamber communicates with the outer chamber around the shaft 12 of the rotating member,

and a fan 13, comprising a plurality of radial blades let, is mounted on the shaft at this point to provide a forced circulation of air through the active parts of the machine.

A clamping ring 15 is provided adjacent to-the plate 10 within the drum formed by the end connections of the winding, and a second ring or band 16 is clamped around the outside of this drum and forces the coils into engagement with the inner ring, spacing rings 17 of insulating material being interposed between the rings and the coils and between the two layers of the coils themselves.

The weight of the coils and of the rings 15 and 16 is borne by the brackets 6 so that efficient clamping rings may be employed without causing the coils to sag.

Since modifications in the structural details and arrangement of parts may be effected within the spirit and scope of my invention, I desire that only such limitations shall frame, and annular bafile plates secured to v the brackets to form a chamber adjacent to the end of the frame.

2. In a dynamo-electric machine, the com-' bination with a stationary frame, an arma-- ture core'and its winding, a rotatable field magnet and a fan carried by the field magnet shaft, of bafiie plates for partially inclosing a space adjacent to the armature into which air is forced by said fan, and brackets secured to the stationary frame for supporting the bafiie plates.

4;. In a dynamo-electric machine, the combination with a stationary frame, a hollow cylindrical core member secured thereto, a winding comprising a lurality of coils having ends which extend eyond the core member, and an inclosing end bell, of rings for supporting theends of the coils, means for dividing the space within the end bell in planes perpendicular to the axis of the machine, and .a plurality of brackets attached to the end of the frame for supporting the rings and the dividing means.

5. In a dynamo-electric machine, the combination with a stationary frame, a hollow cylindrical core member supported thereby, an end bell secured to the frame, and a rotatable member operatively "mounted within the core, of a winding for the stationary member comprising a plurality of coils having ends which extend beyond the core memher, a plurality of brackets secured to the stationary frame, baflie plates secured to the brackets for inclosing a space adjacent to the end of the machine, and clamping rings sup ported by said brackets.

In testimony whereof, I have hereunto subscribed my name this 28th day of Oct,, 1908.

JOSEPH T. ROBERTS.

Witnesses: v

T. B. HUMPmims, BIRNEY HINES.

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