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Патент USA US3024014

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March 6, 1962
Filed Sept. 8, 1959
wi l
United States Patent 0
Charles H. Stoddard and James Lay?eld, Wellsville, N.Y.,
assignors to The Air Preheater Corporation, New York,
N.Y., a corporation of New York
Filed Sept. 8, 1959, Ser. No. 838,799
2 Claims. (Cl. 257-—267)
Patented Mar. 6, 1962
in sealing relation with the ?anged ends 47 of ducts 38
and 42 are adapted to permit substantially leak free ro
tation of the axially spaced hoods about the vertical axis
of the housing. The end of each hood adjacent the hous
ing terminates in a plate 48 adapted to lie in a plane
parallel to and adjacent the end face of the mass of
heat exchange element. Each plate 48 is centrally aper
tured at 49 to permit its being mounted on the axial
This invention relates to a heat exchanger of the class
rotor shaft 50. The plates include diametrically spaced
that comprises a mass of heat absorbent element that
apertures 51 adapted to progressively coincide with the
is adapted to be alternately brought into contact with a
several compartments 26 as the hood is rotated about its
stream of heating ?uid and a ?uid to be heated whereby
vertical axis. Sectorial ?anges 53 at the side of each
heat from the heating ?uid is transferred to the ?uid to
aperture 51 are provided to preclude the leakage of ?uid
be heated through the intermediary of the heat absorbent
element. Heat exchangers of this type are known as re
out of the chamber within the hood during rotation about
its central axis. The hoods 44A and 44B are illustrated
generative heat exchangers, and they are adapted to be 15 as extending diametrically with a pair of apertures 51
either continuously or intermittently exposed to the al
ternate ?uids by ?ow directing means that includes seal
ing means arranged to isolate one ?uid from the other.
There are today two principal types of regenerative
heat exchangers in common use. In one type a regenera
tive heat absorbent element is rotated between ?xed ducts
for the heating ?uid and the ?uid to be heated and in
the other type ?ow directing means at opposite ends of
a ?xed mass of heat absorbent material are adapted to
available to direct ?uid through opposite compartments.
Under certain conditions however, it may be desirable
to restrict the high pressure ?uid to a single side of the
20 heat exchanger and it is entirely within the scope of this
invention to utilize a radial hood that directs ?ow through
but a single compartment 26 or the equivalent portion of
two adjoining compartments. ,
The rotor shaft 50 is axially divided into two end sec—
tions 50A and 50B axially spaced from a center portion
rotate synchronously whereby the heating ?uid and the 25 500 therebetween. The center section extends axially a
?uid to be heated are alternately directed through the
distance substantially equal to that of cylindrical shell
heat absorbent element.
22 and is provided at each end wtih an axial extension
This invention is directed to the latter type of heat
in the form of a cylindrical shell 52 ?xed to the outer
exchanger including a ?xed matrix having a pair of ?ow
end thereof. Each extension is provided with a pair of
directing means at opposite ends thereof adapted to ro
diametral slots 54 through which bolts 56 extend to secure
tate in unison to alternately direct the heating ?uid and
annular ?ange 58 on plate 48 to the shaft 500. Packing
the ?uid to be heated through spaced portions of the
means 62 surrounding shaft members 50A and 50B pre
heat absorbent element. In heat exchangers of this type
clude leakage of high pressure ?uid through the annular
where the pressure of the heating ?uid and the pressure
‘spaces surrounding the shafts.
of the ?uid to be heated usually vary considerably, dif
The shaft assembly 50A, 50B and 500 is rotatably
?culty may be encountered in sealing one ?uid from an
mounted in bearings 64 supported by independent struc
other. This invention accordingly attempts to provide an
ture 66, and the entire rotor shaft and integral hood
e?icient adjusting arrangement for the sealing means
members 44A and 44B are rotated about their central
that is adapted to preclude leakage of one ?uid to the
axis by motive means (not shown) acting through a
other. Morever the apparatus of this invention attempts
driving gear 68 a?ixed to the rotor shaft.
to balance the force of the ?uid pressure at opposite ends
In order that the hood members may be adjusted
of the matrix acting against the ?ow directing means so
axially to secure an optimum relationship between seal
as to eliminate an inequality of pressure acting upon the
ing members 72 and the adjacent face of plates 48, elon
spaced ?ow directing means.
gate ?exible means 74 are directed axially through the
The invention is illustrated by the accompanying draw
rotor shaft and anchored at one end to a plate 76 sup
ings that form part of this speci?cation, wherein:
ported on the end face of shaft 50A, and at the opposite
FIGURE 1 is a longitudinal sectional view of a pre
end to a plate 78 within the shaft 50B by eye-bolts 82
ferred form of our invention.
or their equivalent. An adjusting bolt 84 secured to
FIGURE 2 is a transverse sectional view as seen on line
78 extends axially through an opening in plate 86
2—-2 of FIGURE 1.
that bears against the end face of shaft 50B in such a
Referring more particularly to the drawings, the heat
manner that tightening the nut 88 against the face of
exchanger comprises an outer cylindrical drum 20 and
plate 86 tends to shorten the axial distance between plates
a concentric inner drum 22 that are radially spaced to
76 and 86 and accordingly decrease the axial spacing
provide an annular chamber therebetween. The annular
between hood members 44A and 44B and adjacent end
chamber is divided by a series of radial partitions or
edges of sealing means 72. Conversely, loosening nut 88
diaphragms 24 to provide a series of sectional compart
permits the ?uid pressure within chambers 26 to act
ments 26 therebetween. Each compartment 26 is in
against opposing hood members 44A and 44B to force
turn packed with a mass of regenerative heat exchange
them axially apart so as to increase the axial spacing
material 28 having axial passages therethrough in order
between sealing means and the confronting surface of
that ?uid may ?ow therethrough in a contacting relation 60 the hood members.
ship. The outer drum 20 is enclosed in a housing 32
While this invention has been described with reference
having a pair of ducts 34 and 36 positioned at opposite
to the embodiment illustrated in the drawing, it is evident
ends thereof to provide inlet and outlet passages for a
that various changes may be made without departing
low pressure heating ?uid. A pair of ducts 39 and 42
from the spirit of the invention. It is therefore intended
are provided with ports to the housing 32 coaxial thereto.
that all matter contained in the above description or
These ducts are adapted to direct a high pressure ?uid
shown in the accompanying drawings ‘shall be inter
to be heated to and through the axial passages in the
preted as illustrative and not in a limiting sense.
mass of heat exchange material 28 carried in the com
We claim:
the like comprising in
A pair of rotatable hood members 44A and 44B that 70 combination a pair of concentric cylindrical drums radially
have annular end surfaces 46 remote from the housing 20
spaced to accommodate an annular heat exchange matrix
therebetween; a housing surrounding both drums arranged
to provide a chamber at each end of said matrix having
inlet and outlet apertures for a heating ?uid and a ?uid
bearing means for supporting spaced ends of the cylindri
cal shaft; to be heated being arranged in opposite end walls
of said housing axially aligned with the cylindrical drums;
?ow distributing means in each chamber at opposite ends
of the matrix axially aligned to direct ?uid flow through a
predetermined portion of said matrix, said flow distribut'
?uid and a ?uid to be heated in the end walls thereof,
one pair of said inlet and outlet apertures being arranged
at opposite ends of said housing in concentric alignment
with the annular drums; flow distributing means in each
chamber at opposite ends of said matrix axially aligned
and adapted to direct one of said ?uids ‘to and through
a portion of said matrix therebetween; a telescopically
adjustable cylindrical shaft extending freely through the
innermost cylindrical drum and its concentrically aligned
inlet and outlet apertures, said shaft having spaced ends
ling means formed to include an annular opening con '10 ?xedly secured to the aligned ?ow distributing means
fronting the ‘axial opening of the adjacent end Wall ‘and
a sectional opening confronting the end face of said
matrix; a telescopic shaft extending freely through the
innermost cylindrical-drum and the concentric inlet and
outlet apertures having independent sections at opposite
ends thereof secured to the spaced ?ow distributing
means; means for rotating the cylindrical shaft about its
axis; to be heated, the inlet and outlet aperture for the
?uid and means adapted ‘to vary the length of said shaft
to accordingly vary the clearance space between the flow 20
distributing means and the adjacent face of said annular
2. Heat exchanger apparatus or the like comprising in
combination a pair of concentric cylindrical drums radi
ally spaced to accommodate an annular heat exchange 25
matrix therebetween; a housing surrounding said drums
and arranged to provide a chamber at each end of said
‘matrix having inlet and outlet apertures for a heating
at opposite ends of the matrix; means for supporting
v{the telescopic shaft ‘and the attached ?ow distributing
means; means for imparting a rotary motion to the cylin
drical shaft; and tension means extending through the
telescopic shaft and secured to spaced ends thereof; and
adjusting means at opposite ends of the telescopic shaft
adapted to axially vary the clearance space between the
?ow distributing means and the adjacent face of said
annular matrix.
References Cited in the ?le of this patent
Riley _______ __Y.__-_V..___ May 24, 1932
Great Britain __________ __ Dec. 5, 1947
Patent No. 3,024,004
March 6, 1962
Charles H. Stoddard et al.
It is hereby certified that error appears in the above numbered pat
ent requiring correction and that the said Letters Patent should read as
corrected below .
Column 3, lines 4 and 5v strike out "bearing means for
supporting spaced ends of the cylindrical shaft;" and insert
instead —— to be heated,
the inlet and outlet aperture for
the fluid -—;.‘ lines 18 and 19, strike out "to be heated‘7 the
inlet and outlet aperture for the fluid", and insert instead
—— bearings means for supporting spaced ends of the cylindrical.
Signed and sealed this 9th day of July 1963.v
Attesiing Officer
Commissioner of Patents
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