US940632A

US940632A - Dynamo-electric machine.

Info

Publication number: US940632A
Application number: US28922105A
Authority: US
Inventors: Bernard Arthur Behrend
Original assignee: Allis Chalmers Corp
Current assignee: Allis Chalmers Corp
Priority date: 1905-11-27
Filing date: 1905-11-27
Publication date: 1909-11-16
Anticipated expiration: 1926-11-16

Description

B. A. BEHREND.

DYNAMO ELEGTRIG MACHINE.

0N FILED NOV. 27, 1906.

Patented Nov. 16, 1909.

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. BY a? 1% B. A. BEHREND.

DYNAMO ELEOTRIG MACHINE.

' APPLICATION FILED NOV. 27, 1905. 940,632. w Patented Nov. 16, 1909.

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UNIT ST BERNARD ARTHUR BEHREND, OF NORNOOD, OHIO, ASSIGNOR TO ALLIS-CEALMERS COMPANY, A CORPORATION OF NEW JERSEY, AND THE BULLOCK ELECTRIC IVIANU- FACTURING COMPANY, A CORPORATION OF OHIO.

DYNAMO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented Nov. 16, 191%.

To all whomc't may concern:

Be it known that I, BERNARD ARTHUR .Bnnnnxo, citizen of the United States, residing at Nor-wood, in the county of Hamilton and State of Ohio, have invented certain new and useful 1m )rovements in Dynamo Electric Machines, of which the following is a full, clear, and exact specification.

My invention relates to dynamo-electric machines and especially to the means for supporting and holding in position the endturns of the stator coils.

In a large multiphase generator of the rotating field type as ordinarily constructed, the outer ends of the armature coils are left unsupported. Between adjacent coil endturns there exist magnetic actions due to the fields enveloping said end-turns. Under ordinary working conditions the magnetic actions are not sufiicient to cause any clamage. However, it has been found that if the armature is accidentally short circuited said magnetic fields become so great and the magnetic actions between the adjacent coil endturns are so intensified as to distort and twist the end-turns out of place, causing considerable damage. The object of my invention is to so support and hold the end turns of the coils that this danger of injury to the coils due to the magnetic actions, in case of accidental shortcircuit of the armature, will be avoided.

In carrying out my invention, I provide a support for the end turns of the coils of the armature winding, which is preferably a distributed winding, and separately or independently secure each coil to the support by some means such as binding tape or cord.

More specifically considered, my invention consists of. a dynamo-electric machine having a stationary member comprising an armature core, a supporting frame and endshields or end-bells, armature coils having end-turns extending beyond the core, bolts extending radially from each end-shield, an end-turn supporting ring secured to the inner ends of the bolts of each end-shield, and means for fastening the end-turns to the supporting rings, whereby all danger of displacement of the end-turns is avoided.

My inventionstill further consists of the details of construction and the combinations of elements described in the specification and set forth in the appended claims.

Reference is had to the accompanying drawings in which Figure 1 is a longitudinal sectional elevation of a large turbo-alternator provided with my invention; Fig. 2 is an end view of the same only two of the armature coils however being shown; Fig. 3 is an enlarged detail of the end-turn supports shown in Fig. 1; Fig. 4: is an enlarged detailed endview of the support and Fig. 5 illustrates a slightly modified form of my invention.

Referring to the figures of the drawing I have shown at 10 a shaft carrying the ordinary rotating field 11 of a turbo-generator. The stator comprises a slotted core 12 consisting of groups of laminae held to the frame 13 and to the endheads 14 by hori zontal bolts 15. The armature winding is in this case an ordinary distributed winding held into the slots of the core in any suitable manner and provided with end-turns or portions 16 which project beyond the core. End-shields or end-bells 17, in this case integral with the end-heads 14, surround the endturns. As the machines are ordinarily constructed these end-turns are left unsupported. It has been found however that in case the armature is short circuited that the end-turns will be twisted or distorted out of their normal positions, due to the interactions of the intense fields surrounding the adjacent armature coils. in order that this danger of injury to the coils may be avoided I support the end-turns and hold them in relatively fixed position in such a manner that all danger of displacement in case of short circuit is practically eliminated.

The end-shields 17 are each provided with curved inwardly extending portions. lGxtending radially from the curved portion of each end-shield 17 are a number of bolts 18 arranged at intervals around the entire shield. These bolts are threaded at their inner ends and are screwed into and support an iron ring 19. Mounted on the inner surface of the iron ring is a wooden rin 20 built up preferably of a number of sections. As shown in the drawings the end-turns 16 rest against the inner surface of the wooden ring and each turn is bound to the wooden and iron rings by cord, wire or tape 21, or any other suitable flexible binding material.

In Fig. 5 the bolts 18, in addition to supporting the rings and the end-turns, support the ordinary end connectors, which connect the diti'erent poles of each phase. The bolts are shown as insulated by tubes Two cross connectors are. shown at 28 bound to the insulating tubes 22, by cord or wire 24;. it is to he understood that as many cross connectors desired may be supported in the manner shown.

it will be seen that the end-tnrns ol' the coils will be eti'ectively held in position and that displacennmt will be impossible. The (t istruetion is simple and the parts can be easily assembled or removed when desired.

l do not wish to be conlined to the details ot construction, but my invention is susceptible ot considerable modilication. l aim in the appended claims to cover all modilica tions which do not depart l l'tllll the spirit of my invention.

What t claim as new and desire Letters Patent is:

l. in a dynainn-electric machine, a. sta tionary armature comprising a core, a distributed armature winding conn arising coils having portions projecting beyond the core, a stationary suptanting member to! the, projecting portions ol the coils, and separate means 'liastening each coil independently to said supporting member.

2. In a dynamo-electric machine, a stationary armature, armature coils having end-turns extending beyond the ends oi the arimiturc core end heads and shields, supports tor the end-turns secured to the end shields, and means engaging the end-tnrnr'i and the supports :t'or securing the end-turns to the supports.

3. In a dynamo-clectric machine, a sta tionary armature comprising a core and supporting :trame, distributed armature winding compr1sing coils having end-turns extending beyond the core, a supporting ring tor the end turns, and means binding the end-turns to the supporting ring. 7

l-. in a l \'ll2ti1l(i-0l(3til'lti machine, a stanary armature conu rising a core, a disibuted armature winding comprising coils :ving end-turns extending beyond the core, l end-turn supporting ring, and .means fl l' fastening each end-turn separately and intlepe:ntentl to the ring.

5. in a dynamo-eltwtric machine, a stationary armature comprising a core, a core supporting frame, a distriln'ited armature winding comprising coils having end-turns extending beyond said core, supporting rings for the end-turns secured to the lrame oil the machine, and means engaging the rings and end-turns tor fastening said endturns to the supporting rings.

(3. in a dynamoelectric machine, a stationary armature and supporting lrame therefor, armature coils having end -turns extending beyond the core, an overhanging shield or belt at each end of the *lrame, a coil end-turn supporting ring secured at intervals to each end-shield or bell, and means tor 'lasleuing each end-turn independently to a supporting ring.

T. In a dynamo-chartric machine, a sla tionary armature comprising a core and supporting 'lraine, end-shields or bells. armature coils having end turns, radial bolts extending at intervals lrom each o'l said end-shields, a ring supported on the inner ends ot the bolts extending from each end shield, and means tor binding the end-turns to said rings.

8. in a dyinnno-electric machine, a stationary member comprising an armature core, a supporting frame, and end-shields or bells, armature coils having end-turns extending beyond the core, bolts extending radially "from each end -sh.ield, an end-turn supporting ring secured to the inner ends at the bolts of each end-shield, means for tastening said end-turns to the supporting rings, and end connectors support ed on said radial bolts.

9. in an alternating current dynamo-electric machine, a core and an end member. armature coils having end-turns, connectors between the coils of the poles (it each phase, and insulated bolts mounted on the end member tor supporting the cnd-turns and end-eonnectors.

in testimony whereot l7 a'l'lix my signature, in the presence ole two witnesses.

lililNAlllr Ali'iltllll lll'lllllllhll. Witnesses:

Lanna E. \l nneu, An'rutu: l Kwis.