Aug. 4, 1931.
lR. A. BAUDRY
_ 1,817,054
LARGE HIGH SPEEDv RoToR
Filed Jan. 1Q', 1929
2 Sheets-Sheet` -l
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INVENTOR
Rene/4, Ba ¿fd/y
BY
-AT'ToRNEY
Aug.' 4, 1931.
R. A. BAUDRY
1,817,054
LARGE HIGH SPEED RoToR
Filed Jan. 10, _1929
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2 Sheets-Sheet 2
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lNvENToÈ
Her/e’ A. Baa/dr]
BY
ATTORNEY
-
Patented Aug. 4, V1931
1,817,054 i
UNITED STATES PATENT OFFICE
RENÉ A. BAUDRY, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE
i
ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA l
LARGE, HIGH SPEED ROTOR
Application filed January 10, 1929. Serial No. 331,582.
My invention relates to rotors for dynamo-y such runningv conditions, and the rim ap
5 .
electric machines, and more particularly to proaches ya floatingcondition with respect to
,
~
‘
large, high-speed rotors of fabricated con the spider.
For a better understanding of my inven
struction.
In the manufacture of rotors for dynamo tion, reference may be had to the accompany v55
i ’electric machines, there is a constant demand
ing drawings, in which
Figure 1 is a View, partially in elevation
for constructions which will give better per
formance, while, at the same time, there is and paríially in section, of a portion of a .
a desire, on the part of the manufacturer, large fabricated rotor embodying my in
.to construct such rotors with a minimum
vention,
60
Fig. 2 is a sectional view taken on a plane
amount of material.
Prior to the present time, a limitation as to represented by the» line II-II of Fig. 1,
Fig. 3 is a developed top plan view of a por
size of dynamo-electric-machine rotors had
apparently been reached which necessitated tion of the rotor, the rim being removed,
15 'an inves'igation of the' possibilities of in showing the arrangement of the parts em
creasing the size of such members.
bodied in my invention,
Fig. 4 is a perspective view of a plate uti
The latest constructions in the art yof manu
facturin g rotors have taken the ïforms where lized in providing flexibility at the points
in the spider arms, in the case of fabricated where the rotor rim is attached to the spider,
27 4 construction, and more particularly, in the
Fig. 5 is an enlarged sectional detail view
case of cast construction, have been integrally showing a novel feature of my invention,
Fig. 6 is a fragmentary view, in eleva
united with the heavy rims which are sub~
j ected to large centrifugal forces while being tion, showing a modified form of my inven
rotated. Large tensional strainsare thereby tion, and
Fig. 7 is an elevational View, partially inv \
4' . imparted to the cent-ral hub connections of the
` radial arms, thus placing an undersirable section, of the rotor shown in Fig. 6, the sec~
tion being on a plane represented by the line
limitation on the size of the rotor.
It is an object of my invention to provide a
rotor with means forl relieving the radial ten
. . sion in the spider >arms by reason of centrif
ugal forces exerted by the rim.
VII-_VII thereof.
a
In the drawings, extra heavy lines have
been used to indicate where the parts are
welded, as well as, in some places, to show
It is a further objectofmy invention to the contours of parts, While the dotted heavy
provide a rotor wherein better utilization of >lines are'used to indicate the same places of
material may be made and whichmay be run welding that are invisible in the drawings.
In Figs. 1 to 5, inclusive, is illustrated a
" ~ at higher speeds than those which have been
l ’constructed heretofore.
In accordance with my invention, I pro
vide the ends of the spider arms with resil
ient connections or flexible plates, to which
40 -the heavy rim is secured. In the process of
' assembling the rotor, they rim is expanded by
rotor, constructed in accordance with my in
vention, in which a hub 11 comprises two
cylindrical parts 12 'and 13 which are held
in abutted or end-to-end relation by a cylin
drical weld, indicated at 14. The hub 11 has
heat, and wedge pins are. disposed between the spider arms 17 having an H-section 'may be
inner periphery of the rim and the flexible secured, as by means of bolts 18.
Adjacent spider arms are rigidly fixed to
plates carried by spider arms, so that, upon
45
Fil
Y,
flange portions 15 and 16, to which radial
-
'shrinking of the rim, the arms are placed each other at the hub, by welding them to L
r’under compression. >By virtue of the tend gusset plate 19, as indicated at 20. »In or
ency for the rim to expand, when rotated, the der to support the arms at their outer ends,
arms are accordingly relieved of tension, at rings 21 are provided, to which the arms are
a predetermined speed of the rotor. Prac fastened by the welds 22 and 23, and by
O ¿tically
no stresses remain in the arms during bolts 24..
10.0,
2
1,817,054
In assembling the spider portion ot the space of about one-sixteenth of an inch be`
rotor member, the spider arms 17 and rings tween it and the center ot each of thc flexible
21 are welded together, with the gusset-s 19 connecting plates 25, and, at the same time,
rl‘hen the the spider arms 17 are kept cool by any avail
whole is turned to the proper outside diam able means, such as by a cold pack. When the
eter and bored to the proper inside diameter, desired expansion is obtained, a wedge pin 48 70
at the inner- ends, as described.
after which the two hubs 12 and 13 are is inserted between the rim 535 and the cen
10
pressed into place, bolted at 18, as described, tral portion of cach of the connecting plates,
and preferably also welded at 2li“ by means the thickness et the wedge pins being so calof fillet welds along the inner edges of the culated that, when the rim cold and sta
tionary, the spider-arms will be under com
webs of“ tl c H-beam spider-arms 17.
A. slightly flexible plate 25 having beveled pression with a force equal and opposite to
edges 2G, is welded, along the middle there the centrifugal torce which will be d veloped
of, to the web portion ‘.27 of each of the H at a certain speed, which may be the. rated
beam spider-arms 17 at the end thereof, as speed or a certain over-speed, according to the
indicated at Q8, the construction of which is exigencies ot the case.
Ít will be noted that the flexible connecting
shown more clearly in Fig. 5. Perforations
29 are provided in the plate to make plug
75
80
plates 25 are slightly flexed, by this process,
weld connections to the peripheries 'of the and that they support the weight of the rim
rings Q1 and to the Ílange portions of the H 35 and transmit torque between the rim and 85
beam spider-arn'is 17, as shown in F ig. 3.
ln order to support the ends ot' the plate
25, and to provide a guard for protection
during transportation, a plurality of pro
jecting members 31, having _a T-section, are
welded to the ring 21, with the flange facing
the spider, without pulling outwardly on the
spider arms 1,7, due to the expansion ot the
rim, at high speeds,
In Figs. G and 7, is illustrated a more sun~
ple construction, showing an application ot"
my invention to solid-rim rotors. Adjacent
90
toward the center of the rotor, in the manner spokes or arms 51 of H-section material are
indicated at
A ring 33 is fillet-welded to welded to hub plates 52, and to each other at
30
the outer ends of the projecting T-bar pieces the hub. as indicated at 53 and 54, respective~
531, and is also plug-welded to the plates 25, ly. The outer ends of the arms are tapered
through recesses 3l at the ends of the latter. and their web portions are connected to lflexible
A rim 35 oi’ the laminated type, as shown plates 55, by fillet welds 5G between the webs
in Fig. 1, is provided, having dave-tail tabs ot' the spider-arms and the undersidcs olf' the
35 with which the plates have engagement.
The rim 35 consists of punchings held to
plates.
A solid rim 57, having bolts 5S for carry
gether between end plates 37 by means ot'l ing lield pole pieces 59, is secured to the plates
bolts 38, as shown in Fig. 2.
at both ends thereof, by wclds G1. Each
100
The tlexible plates
are provided with plate is provided with perfor-ations G2 so
reces: 39 to facilitate the assembly of the that it will not interfere with the heads ot
40
laminations, whereby the dove-tail tabs 3G the bolts utilized to tix the pole pieces. Con~
ot' the laminations may be passed there sequently, upon rotation of the rotor, any ex
through, thereby making it unnecessary to Dansion of the rim is not transn'iitted to the
slide the lamination the entire length ot' the arm because of the flexibility provided by the
plate.
45
50
The laminated rim supports salient pole
pieces -12 which may be secured in position
by dove-tail joints '-lîl, as shown in Fig. 1.
In the particular embodiment el’ my in
vention shown in Fig. 1, I provide twice as
many connecting plates Q5, between the rim
Íiexil’ily-mounted plates
In illustrating my invention, reference has
been made to fabricated constriwtion, but it
will be understood that. it has equal applica
tion to a. cast construction l’or either the rim
or the spider.
Also, it will be understood that my inven
85 and the spider member, as there are spider tion may readily be adapted to fly/wheels, or
arms 17. To support- the connecting plates to any other application having to do with the
Q5 which are disposed mid-way between spi rotation of large rim-mass at high speeds,
der arms, I provide short l‘l-section pieces and is, therefore, not entirely limited to
15 having the same cross-section as the spi rotors of dynan'io-electric machines.
der arms, but not long enough to extend to
It will be apparent. to those skilled in the
the hub. These short cross-H-bars l5 are art, that the foregoing, and various other.
connected between the rings Q1, and are at modifications may be made in the detailed
tached to connecting plates Q5, in the same arrangement of parts. but it is intemled to
manner as the spider arms 17, as described cover herein such modifications as Ytall with
above.
in the spirit and scope ot my invention. as
In assembling the rotor, the rim 35 is heat defined inthe appended claims.
i
ed to a high temperature, by any suitable
I claim as my invention:
1. A rotatable apparat-us comprising scp
until it is expanded sulliciently to provide a arate rim and spider members and circum
means, auch as a gas flame, or electric heaters,
10
1,817,054;
ferentially disposed plates secured, at cir jecting portions, plates ki‘ecessly-enga,f_,r`ing
cumferentially aligned spaced points, to the said portions, means for securing said arms
rim and spidermembers,respectively, said to said plates, additional means for holding
plates lying against the end surfaces of the said arms in spaced circui'nferential relation
spider members, whereby said plates support comprising annular members, and means
the weight of the rim member and transmit
rotational torque thereto or therefrom, with
out materially pulling outwardly on the
spider member when the rim member ex
10
carried by said annular members for resili
ently engaging said rim, between adjacent
arms, in a manner similar to the above-re
cited means 'lï’or attaching each of said arms
pands, under expected speed conditions, due and including the utilization of above-men
to the centrifugal forces therein.
tioned plates.
p
,
`
2. A rotatable apparatus comprising a
7. In a rotor member for a dynamo-elec
spider member and a relatively massive rim tric machine, a hub, spider arms of H-section
15
member, the latter being of such nature as to structural steel welded to said. hub, ya lami
tend to expand under centrifugal forces re nated rim, the inner periphery of which has
sulting from expected speed conditions, cir inwardly-projecting portions, means for at
cumferentially disposed plates secured, at
20
25
30
taching said rim to the ends of said arms
spaced points, to the rim and spider mem comprising plates rccessly engaging two of
bers, respectively, and a wedge member inter said portions and having elongated perfora
posed between each plate, near itsr point of tions along the middle thereof, the web por
connection to one of said members, and the tion of said H-section being welded to the
other of said members, said spider members middle of said plate, said pla-te being fur
being, when the apparatus is at standstill, ther welded at the flange portion of said
under a compressional force which is ap iii-.section within the perforations and hav
proximately equal and opposite to the expect ing notches in .its edge to aid in the assembly
ed centrifugal forces, whereby said plates of said laminations.
8. In a rotor member for a dynamo-elec
support the weight of the rim member and
transmit rotational torque thereto or there tric machine, a hub, spider arms of H-section
from, without materially pulling outwardly structural steel welded to said hub, a lami
on the spider member when the rim member nated rim, annular members for holding the
expands, under expected speed conditions, ends of the arms in spaced circumferential
due to the centrifugal forces therein.
relation, plates welded to the ends of said
3. A rotor for a dynamo-electric machine arms and projecting voutwardly beyond said
435
comprising a hub, spider arms secured to annular members, and a flange carried by
said hub, a laminated rim having circumfer saidannular means for supporting and pro
entially spaced, inwardly-projecting por tecting the’ outer ends of said plate.
tions, slightly flexible plates secured to ends
40
45
50
55
60
9. A rotor for a dynamo-electric machine
of said arms, each of which is in engagement comprising a hub, spider arms secured to
with two of said portions of said rims at said hub, a rim, slightly-flexible plates hav
points in substantially circumferential aline
ing their two circumferentially extending
ment with the points of attachment between ends secured to the inner periphery of said
the plates and the arms, said plates lying rim, and said arms being fixed' to said plates
against the end surfaces of said spider arms. at points in substantially circumferential
4. A rotor for a dynamo-electric machine alinement with said ends of the plates.
lcomprising a hub, spider arms secured to said
10. A rotor for a dynamo-electric machine
hub,` a laminated rim having circumferen comprising af hub,l spider' arms secured to
tially spaced, inwardly-projecting dove-tail said hub, a rim, plates having their two cir
portions, flexible plates engaging said por cumferentially extending ends secured to the
tions and welded to the outer ends of said inner periphery of said rim, and the outer
arms, along the middle region of said plates,
at points in substantially circumferential
alinement with the dove-tail portions, said
plates lying against the end surfaces of said
ends of said arms being welded tothe re
spective plates at a region intermediate said
ends and iny substantially circumferential
alinement with said ends of the plates.
spider arms.
11. A fabricated wheel comprising a hub,
5. A rotor for a dynamo-electric machine spider arms of structural steel of H-section,
comprising a hub, spider arms secured to secured to said hub, a rim, resilient plates
said hub, a laminated rim having inwardly having their ends secured to the inner pe
projecting portions, flexible plates recessly riphery of said rim, and the web portion of
engaging said portions, means for securing said H-section secured to said plates at a
iso
said arms to said plates, and separate means region >midwaybetween the ends thereof.
l2. A rotor member comprising a hub,
disposed between adjacent arms for resili
ently supporting said rim.
spider-arms and a rim, characterized by the
6. A rotor for a dynamo-electric machine fact that torque-transmitting plates are in
comprising a hub, spider arms secured to said terposed between, and connected to, the inner
hub, a laminated rim having inwardly-pro periphery of the rim and to the outer ends
12D.
4
1,817,054
of the respective spider-arms in a manner arms, a relatively heavy rim, and torque
adapted to transmit tangential driving transmitting plates interposed between, and
torques, the points of connection to the rim connected to, the inner periphery ot' the rim
and sl'iider-arins, respectively being substan and to the outer ends of the. respective radial
circnmterentially aligned.
arms and intermediate radial pieces in a
lì-S. A rotor member comprising a hub, manner adapted to transmit tangential driv
spider-arms and a rim, characterized by the ing torques, the points of connection to the
.tact that torqlie-transmitting plates are in rim and radial arms and/or pieces, respec
terposed between, and connected to, the inner tively, being displaced circumferentially.
17. A. rotor member comprising a hub, a 75
periphery et the rim and to the outer ends ot'
the respective spider-arms in a manner adapt plurality of radial spider-arms extending
d to transmit tangential driving torques, outwardly ~trom said hub, annular members
the points ot connection to the rim and joining the spider-arms near their outer ends,
spider-arms, respectively, being substantially short intermediate radial pieces secured to
circumterentially aligned, and characterized said annular members between said spider
:further by the fact that the rim is shrunk arms, a relatively heavy rim, and torque
onto the spider-arms with suiiicient tightness transniittiug connections from the radial
80
to prevent expansion out of contact there spider-arms and from the intern'lediate radial
with by reason of centrirugal forces at a pre pieces to the inner pe `iphery of the rim, the
determined speed which is at least as high as said rim being shrunk onto the spider-arms
the normal rated operating speed of the and intermediate radial pieces with sutlicient
tightness to prevent expansion ont of contact
ist. A rotor member comprising a hub, a therewith by raison ot centrifugal forces at
rotor member.
plurality of spider-arms extending outward a predetermined speed which is at least as
ly 'from said hub, an annular member join high as the normal rated operating speed of
ing the spider-arn'ls near their outer ends, to the rotor member.
ln testimony whereot1 I have hereunto sub
constitute a spider structure, and a rela
tively heavy rim surroundingr said spider scribed my name this -ith day of January,
structure, characterized by the fact that 19:29.
torqne-transmitting plates are interposed
RENÉ A. BAUDRY.
90
95
between, and connected to, portions of the
inner periphery ot' the rim and portions of
the onter periphery of the spider structure
i u a manner adapted to transmit tangential
driving toi-ques, the points of connection to
¿he rim and spider structure, respectively,
being` substantially circumterentially aligned.
l5. ¿l rotor member comprising a hub, a
plurality ot spider-arms extending outward
ly from said hnb, an annular member joining
‘the spider-arms near their outer ends, to con
stitute a spider structure, and a relatively
heavy rim surrounding said spider structure,
characterized by the fact that torque-trans
inittaig plates are interposed between, and
connected to, portions ol’ the inner periphery
ot the rim and portions ofthe outer periphery
ot' the spider structure in a manner adapted
to transmit tangential driving torques, the
points et' connection to the rim and spider
structure, respectively, being substantially
cir c .nrferentially aligned, and characterized
farther by 'he tact that the rim is shrunk
onto the spider structure with snfiicient tight
ness to prevent expansion ontl of contact
therewith by reason of centrifugal forces at
a predetermined speed which is at least as
high as the normal rated operating speed
ot the rotor member.
l0. A. rotor member comprising a hub, a
plurality ot radial spider-arms extending
olilr-:ardly from said hub, annular members
lining the spider-arms near their outer ends,
nort intermediate radial pieces secured to
said annular members between said spider
12u