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Патент USA US3083780

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‘April 2, 1963
c. P. KOLTHOFF, JR., ETAL
3,033,762
ROTOR CONSTRUCTION
Filed April 18, 1960
2 Sheets-Sheet 1
13V l/EA/J'OE5
GPQUA. 260 4 7710/’
April 2, 1963
c. P. KOLTHOFF, JR., ETAL
3,033,762
ROTOR CONSTRUCTION
Filed April 18, 1960
2 Sheets-Sheet. 2
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United States Patent (“)?tice
1
new
Patented Apr. 2, 1963
2
FIGURE 10 is an enlarged sectional view and partly
broken away taken on line 10—10 of FIGURE 9 illus
trating the arrangement of leaves of the matrix and a tie
bar of the rotor cage.
FIGURE 11 is a sectional view partly broken away
taken on line 11-—11 of FIGURE 10 illustrating the
means for retaining the leaves of the matrix in the rotor
3,083,762
ROTOR CONSTRUCTION
C. Paul Kolthoff, Jra, Naperville, and Mack M. Jones,
Western Springs, 111., assignors to International Har
vester Company, Chicago, 111., a corporation of New
Jersey
Filed Apr. 18, 1960, Ser. No. 23,083
2 Claims. (Cl. 165-45)
cage.
With continued reference to the drawings, numeral 16
This invention relates to a rotor for a rotary regenerator 10 (FIGURE 1) indicates in general a turbine having a ro
or heat exchanger.
tary regenerator indicated at 11 embodying the present
invention. The turbine may comprise a ?rst impeller
More in particular this invention
relates to a rotor cage having removably secured sec
tions or matrices of radial ?ow heat exchanging media.
Heretofore the construction of heat regenerator rotors
wheel 12 drivingly connected to an air compressor in
dicated at 13 through the shaft 14 supported by conven
comprised a unitary constructed matrix of hollow cylin~ 15 tional bearings (not shown). A second impeller wheel
drical shape. The di?iculty with such construction is that
15 may also be provided for performing work on a given
after a period of use the rotor becomes warped or the
load through the output shaft 16. The air compressor
matrix becomes warped resulting in progressively in
13 is provided with the usual air inlet 17 and air outlet
creasing leakage between the sealing shoes. This is due
13. The air outlet is communicatively connected to the
cold air plenum 18’ of the rotary regenerator 11 through
to the radial ‘temperature gradient of the matrix. Also,
there are other causes for such warpage of the matrix such
the cold air conduit 19. Cold air under pressure entering
as thermal fatigue and corrosion. In any event when
the plenum 18’ passes through the matrices, generally in
warpage occurs the efficiency of the regenerator is re
dicated at 20, of a cylindrically shaped heat exchanger or
duced from gas leakage across the sealing members and
rotor generally indicated at 21. into a hot air plenum 22
more power is required to rotate the drum. In the event 25 disposed within the rotor 21. The rotor 21 is rotatably
mounted within the casing 23 of the rotary regenerator 11.
of excessive warpage, extreme damage may occur to the
unit.
It is a primary object of this invention to overcome the
aforementioned difficulties by providing a rotor having a
matrix comprising individual replaceable sections.
Within the rotor 21 mounted in stationary relation
with respect to the shaft 14 and rotor 21 is a wall or
partition 24 as best shown in FIGURE 2. The wall 24
30 extends longitudinally through the rotor 21 and connects
to the rear and front portions of the casing 23. Adjacent
A further object of this invention is to provide a rotor
according to the preceding object wherein each of the
the longitudinal sides of the walls 24 is a pair of sealing
replaceable sections of the matrix comprises a plurality
members, generally indicated at 25 and 26, mounted in
stationary relation. Each of the sealing‘ members 25
of replaceable leaves in contiguous relation, each leaf be
ing provided with a plurality of radial passages for elastic 35 and 26 is provided with an opening for accommodating
fluid ?ow therethrough in heat exchange relation.
the rotor 21 in a rotating direction in substantially sealing
. A still further object of the invention is to provide a
relation whereby compressed air in the cold air plenum
cage in the rotor having removable tie-bars so that sec
‘18’ is not communicated with the cooled exhaust plenum
tions or leaves of the matrix according to the preceding
27 and vthe hot air plenum 22 is not in ?uid communica—
objects may be removed and replaced.
40 tion with the hot exhaust plenum 2S.
These and other important and desirable objects in
- The rotor 21 is rotatably supported by three longitudi
herent in and encompassed by the invention will be more
nally extending rollers 25!, 3t} and 31 as shown in FIG
readily understood from the ensuing description, the ap
URE 2. At least ‘one of the rollers 29, 3t] and 31, such
pended claims and the annexed drawings wherein:
as roller 29, is provided with a pinion gear 32.
45
bine engine with rotary regenerator having the housing
Referring to FIGURES 3 and 9, the rotor may be pro
vided with a ring gear 33 having circumferential teeth in
or casing removed illustrating the rotor and partition
means forming a pair of ?uid chambers.
engageable relation with the pinion gear 32 positioned
FIGURE 1 is a side elevation, in section, of a gas tur
on the roller 29. Obviously the driving means may be
FIGURE 2 is an end elevation of the rotary regener
associated with roller 30 or roller 31 if desired. Thus
ator, in section and partly broken away, taken on line 50 the rotor 21 is supported for driven rotation about its cy
2-—2 of FIGURE 1 illustrating the rotor of this invention
lindrical axis.
positioned in the regenerator.
Within or adjacent to the hot air plenum 22 is mounted
FIGURE 3 is a side elevation of the cage of the rotor
a ‘conventional fuel combustor generally indicated at 34
with matrix removed illustrating the construction details
having its fuel inlet at 35. The fuel and hot air mixture
55 is burned in the combustor 34 and the products of com
thereof.
FIGURE 4 is a sectional view taken on line 4-4 of
bustion are directed into the chamber generally indicated
FIGURE 3 showing further details of the cage construc
as 35' having turbine nozzles 36 and 37. The movement
tion.
of the products of combustion in the chamber 35’ to the
FIGURE 5 is a perspective view of a corrugated ele
hot exhaust chamber 38 performs useful work on the
ment employed according to this invention to provide pas~ 60 turbine’s impeller wheels 12 and 15 in a known manner.
sages for fluid ?ow through the matrix.
The hot exhaust gases in the chamber 38 enter the hot
FIGURE 6 is a perspective view of a plate member
exhaust plenum 23 of the rotary regenerator 11 and pass
for spacing, circumferentially, the corrugated elements of
radially through the matrices 20 of the rotor 21 into the
FIGURE 5.
‘
cooled exhaust plenum 27 and thence discharged through
FIGURE 7 illustrates a radial view of a leaf of the 65 the port 39.
matrix showing the {arrangement of a corrugated element
From the above it can readily be seen that as the hot
and a plate member as components of a leaf.
exhaust gases in the plenum 28 are passed through the
FIGURE 8 is a view, partly broken away, of the leaf
adjacent matrices 20 of the rotor 21, the matrices absorb
of FIGURE 7 ‘but in a circumferential direction.
heat and thus become hot. When the rotor 21 is rotated
FIGURE 9 is a view, partly broken away, similar to 70 in either of the two directions, such as for example clock
FIGURE 3 except that the matrix sections are included.
wise as ‘viewed in FIGURE 2, the ‘heated sectors or
3
8,083,762
matrices of the rotor 21 pass through the sealing mem
ber 26 ‘and move into the portion of the regenerator 11
between the plenums 18’ land 22. Compressed air from
the plenum 18’ passes radially through the hot matrices
20 of the rotor 21 absorbing heat therefrom thus elevat
ing the temperature of the compressed air upon reach
ing the plenum 22. It is evident that the portion of the
4
channels 53 formed therein in parallel spaced relation as
best seen in FIGURES 6 and 8.
Secured to one longi
tudinal side of the plate member 52 is a corrugated ele
ment 54 illustrated in ‘FIGURES S and 7. The direction
'of the corrugations of the element 54 are positioned trans
versely with respect to the channels 53 of the plate mem
ber 52. Securing of the element 54 to the plate mem
matrix 20 nearest the inside surface of the regenerator
ber 52 may be by any conventional means such as spot
rotor 21 will be considerably hotter than the portion
welding the element 54 to the surface 55 of the plate 52
of the matrix 20 adjacent to the outer diameter. The 10 as ‘at points 56 (FIGURES 6 and 8).
preheated vair in the plenum 22 supplied to the combustor
The purpose of the channels 53 in the plate member
34 serves not only to reduce the amount of heat which
must be supplied by the combustor, but also improves
the ei?ciency of the combustor 34. Thus the primary
purpose of the regenerator 11 is to transfer waste heat
from the hot exhaust gases‘ to the compressed ‘air before
entering the fuel combusting device.
52 may be evident from a close examination of FIG
URE 10. It will be noted that the thickness of each
leaf 51 at the outer peripheral surface of the rotor 21
is greater than that at the internal surface. Therefore
in order to provide an assembly consisting of a plurality
of leaves 51 packed together in side-by-side relation to
In view of the foregoing it can be readily appreciated
form a sector shaped assembly, each of the leaves 51 must
that the construction of the rotor 21 of the regenerator
necessarily be radially tapered or wedge-shaped as shown
11 for e?iciently serving ‘as 1a heat transferring medium
in FIGURE 10. Radial planes which intersect at the
is extremely important and is the subject matter to which
rotational axis of the rotor 21 are indicated at 57 and
this invention is directed.
57'. Thus it will be seen that the plane formed by
The rotor 21 comprises a pair of annular shaped rings
the outer surfaces 58 of the channels 53 in the plate
40 ‘and 41 disposed in axially spaced relation as best
member 52 coincides with radial plane 57" intersecting
shown in FIGURE 3. For convenience the ring 41 may 25 the axis of rotation of the rotor 21. Likewise the ex
‘be provided with peripherally disposed gear 33 for en
treme outer edges of the corrugations of the element 54
gagement with the pinion 32 in driven relation as pre
also coincides with radial plane 57’ intersecting the axis
viously discussed. The inner side of ring 40 is pro
of rotation of rotor thus making each leaf 51 tapered
vided with a plurality of radial slots in equidistant rela~ ,
or wedge-shaped in a radial direction. From the stand
tion, two of which are shown at 42 in FIGURE 3. The 30 point of cost it is cheaper to employ commonly available
ring ‘41 is also provided With an equal number of radial
slots 43 on the inner side thereof positioned in longi
tudinal complementary relations with the slots 42 of ring
.40. In each pair of complementary slots 42 and 43 is
corrugated metal material wherein all edges formed by
the corrugations are parallel to each other. Alternatively
of course the corrugated elements could be made, if de
sired, in a radially tapered form such as by a special
disposed slidably a tie-bar 44 the sides of which are 35 forming die. In the embodiment shown the element 54
radial ‘with respect to the center of the cage, as shown in
(FIGURE 5) is cut from material having all corrugated
FIGURE 4.' Thus it will be seen in the embodiment
edges parallel to each other. From this it can be seen
shown that seven tie-bars 44 are employed. Of course
that the channels 53 are formed in the plate 52 so that
it will be understood that the rotor 21 may have more
when it is assembled with the element 54 the outer edges
or less than seven tie—bars as may be desirable but at 40 thereof are in a radial plane and the outer edges 58 of
least two of them. If desired the slots 42 and 43 and
the channels 53 are also in a radial plane. Thus when
the tie-bars 44 may be tapered in a radial direction.
a plurality of the leaves 51 are packed close together in
The tie-bars 44 are removably secured in the slots 42
abutting’ relation a sector-shaped assembly is formed
and 43 by any conventional means such as body-?tted
which ?ts snugly in one opening 48 of the cage 47 in
screws, some of which are indicated at 45 and 46 of 45 abutting relation with the inner side-walls of the ad
FIGURE 3, in countersunk bores in rings 40 and 41 in
registry with threaded bores in the ends of each tie-bar
‘44.
Thus upon removal of the screws 45 and 46 the
jacent tiedbars.
' In order to retain the leaves 51 in the cage 47 each of
the plate members 52v and corrugated elements 54 may
be provided with longitudinal extending projections ‘59,
tie-bars 44 can be removed individually from the rings
40 and 41 by sliding outwardly in the slots 42 and 43. 50 60, 61 and 6'2 as shown in FIGURES 5 and 6. The
From this it can be seen that the assembly of the rings
projections are of a suitable size corresponding with
40 and 41 and the tie-bars secured thereto forms a cage
the circumferential ‘grooves 49 and 501 in the annular
generally indicated ‘at 47 best shown in FIGURE 3. At
rings 41 and 40, respectively, so that the projections are
this point it ‘will be noted that between any pair of ad
circumferentially slidable therein. Thus by removing a
jacent tie-bars 44 with the inner faces of the rings 40 55 tie-bar '44 from the cage 47 each leaf can be inserted by
and 41 therebetween de?nes a sector-shaped radial open
?rst inserting the projections‘ in the slots 42 and £43 and
ing 48 in the cage 47. Thus in the illustration shown
moving the leaf 51 radially inwardly until its projec
in FIGURES 3 and 4 the cage 47 has seven openings 48‘.
tions register with the circumferential grooves 49 and 50.
On the inner face of the ring 41 there is disposed a
Then the leaf 51 is moved circumferentially with its
circumferential groove 49 as best shown in FIGURE 4.
projections sliding in the grooves. ‘By inserting, one
The ring 40 ‘on the inner face thereof is also provided
by one, a su?’icient number of leaves 51 thusly, the open
with a circumferential groove 50 positioned in comple
ing 48 is ?lled and the tie-bar 44 is replaced and secured.
mentary relation with the groove 49 as indicated in dotted
lines in FIGURE 3. The purpose of the grooves 49 and
This forms a completersector-shaped matrix within an
opening 48. The operation is repeated until all of the
50 will-be described later.
65 openings 48‘ of the cage ‘47 is ?lled forming the com
Within each of the sector-shaped openings 48 there is
plete rotor 21. In the embodiment shown there are seven
disposed at sector-shaped matrix indicated at 20. Thus
separate sector-shaped matricesrequired to form the en
in the embodiment shown there is provided seven sector
tire cylindrical matrix of the rotor 21. Obviously the
shaped matrices 20 forming the matrix of the rotor 21.
number of openings '48 in'the cage 47 can be varied if
Each matrix 20 is comprised of a plurality of leaves, 70 desired with corresponding sector-shaped matrices to ?t.
one ‘of which is indicated at ‘51 in FIGURES 7 and 8
Insertion of each leaf 51in the opening 48 of the cage
disposed side-by-side in closely packed relation between
47 is positioned against the ‘outer surface 58 of its ad
two adjacent tie-bars 44 as shown in FIGURES 2, 9 and
jacent leaf in abutting relation thus forming ?uid pas
10. Each leaf 51 is comprised ‘of a rectangular shaped
sagesp63 and ‘64, for example, in substantially vradial di
plate member 52 having‘ a pair or more of longitudinal 75 rection but ‘not in a‘ circumferential direction.
Thus
8,083,762
6
5
when hot exhaust gas from the plenum 28 moves out
wardly through the pas-sages 63 and 64 ‘of each leaf 51
in the exhaust zone between the sealing members 25 and
26 (FIGURE 2) the leaves 51 become heated. As each
leaf 51 moves by the sealing member 26 cold air from
the plenum 18' moves inwardly through the passages 63
and 64 and the heat in the leaf is thereby transferred to
rection, said plate member having longitudinally extend
ing channels, said channels being formed to provide outer
surfaces on the other side of said plate in a radial plane
coinciding With the axis of rotation of said cage, said
‘corrugated element of each leaf being positioned in
abutting relation with the plate member of an adjacent
leaf whereby each of said corrugated elements provides
the air moving radially therethrough to the plenum 22.
a plurality of substantially radial passages for fluid ?ow
From this it can be seen that the matrix of the rotor 21
therethrou-gh in heat exchanging relation.
effectively transfers heat from the hot exhaust gases to
2. For a heat exchanger of the kind described, a rotor
comprising a ?rst vannular ring and a second annular ring
the compressed air.
‘In the event after a period of usage one or more of
disposed in longitudinally spaced relation, each of said
the leaves 5-1 becomes damaged or warped their removal
and replacement can readily be accomplished by revers
rings having a circumferential groove disposed on the
inward side between the inner and outer peripheries there
ing the assembly operation described above. Thus repair
of, each of said rings having a plurality of radial slots
in equidistant relation on the inward sides thereof, said
radial slots in said ?rst ring being positioned in com
plementary relation with said radial slots on said second
of the matrix can be accomplished simply and expediently
with low cost and yet obtain high heat exchange ef?
ciency.
Having thus described a preferred embodiment of the
ring, a plurality of longitudinally extending tie~bars hav
invention it can now be seen that the objects of the in 20 ing a tapered cross-section in a radial direction, one end
of each of said tieabars being removably secured in one
vention have been fully achieved and it must be under
slot of said ?rst ring in [rigid relation and the other end
stood that changes and modi?cations may be made which
being removably secured in a complementary slot in said
do not depart from the spirit of the invention nor from
second ring in rigid relation, said tie-bars and said rings
the scope thereof as de?ned in the appended claims.
25 forming a rigid cage having a plurality of sector-shaped
What is claimed is:
radial openings, a plurality of sector-shaped matrices,
1. ‘For a heat exchanger of the kind described, a rotor
one of said matrices being disposed in each of said open
comprising a ?rst annular ring and a second annular ring
ings of said cage in removably secured relation, each of
disposed in longitudinally spaced relation, each of said
said matrices having a plurality of longitudinally disposed
rings having a circumferential groove disposed on the
inward side between the inner and outer peripheries there 30 matrix leaves in circumferentially abutting relation form
ing a sector, each of said leaves being of substantially
of, each of said rings having a plurality of radial slots
rectangular shape, one end of each leaf being slidably en
disposed in equidistant relation on the inward sides there
gaged in said circumferential groove of said ?rst ring and
of, said radial slots in said ?rst ring being positioned in
the other end being slidably engaged in said. circumferen
complementary relation with said radial slots on said sec
ond ring, a plurality of longitudinally extending tie-bars 35 tial groove of said second ring for preventing movement
of said leaf in a radial direction, each said leaf consisting
having a tapered cross-section in a radial direction, one
of a corrugated element secured on one side thereof to
end of each of said tie-bars being removably secured
one side of a plate member, said corrugated element hav
in one slot of said ?rst ring in rigid relation and the other
ing its corrugations in parallel relation in a substantially
end being removably secured in a complementary slot in
radial direction, said plate member having a longitudi
said second ring in rigid relation, said tie-bars and said
nally extending channel, said channel being formed to
rings ‘forming a rigid cage having a plurality of sector
provide ‘an outer surface on the other side of said plate in
shaped openings, a plurality of sector-shaped matrices one
a radial plane coinciding with the axis of rotation of said
of said matrices being disposed in each of said openings
cage, said corrugated element of each leaf being posi
of said cage in removably secured relation, each of said
matrices having a plurality of longitudinally disposed 45 tioned in abutting relation with the plate member of an
adjacent leaf whereby each of said corrugated elements
matrix leaves in circumferentially abutting relation ‘form
provides a plurality of substantially radial passages for
ing a sector, each of said leaves being of substantially rec
?uid ?ow therethrough in heat exchanging relation.
tangular shape, one end of each leaf having a ?rst projec
tion slidably engaged in said circumferential groove of 50
References Cited in the ?le of this patent
said ?rst ring and the other end having a second projec
UNITED STATES PATENTS
’
tion slidably engaged in said circumferential groove of
said second ring for preventing movement of said leaf
1,143,082
Shepherd et a1. _______ _._ June 15, 1915
in a radial direction, each leaf consisting of a corrugated
1,654,294
Ljunstrom ___________ __ Dec. 27, 1927
element secured on one side thereof to one side of a plate 55
1,843,252
Toensfeldt ____________ __ Feb. 2, 1932
member, said corrugated element having its corrugations
2,909,363
2,937,010
Kolthoff et al. _________ __ Oct. 20, 1959
Collman et a1. ________ __ May 17, 1960
in parallel relation extending in a substantially radial di
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