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Патент USA US3031854

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May 1, 1962
w. A. TOMOLONIUS
3,031,844
SPLIT COMBUSTION LINER
Filed Aug. 12. 1960
3 Sheets-Sheet 1
"
INVENTOR
WILL/AM A. TOMOLO/V/US
M1144
May 1, 1962
w. A. TOMOLONIUS
3,031,844
SPLIT COMBUSTION LINER
Filed Aug. 12. 1960
3 Sheets-Sheet 2
F / 6'. 2
INVENTOR
WILLIAM A. TOMOLON/US
BYgQQZZZé/QW
AGENTS
May 1, 1962
w. A. TOMOLONIUS
3,031,844»
SPLIT COMBUSTION LINER
Filed Aug. 12. 1960
5 Sheets-Sheet s
23
INVENTOR
WILLIAM A. TOMOLO/V/US
‘
BY
.
M.
GQQ.
AGENTS
United States Patent O?ice
1
3,031,844
William A. Tomolonius, North Reading, Mass, assignor,
SPLlT CGMBUSTION LINER
by mesne assignments, to the United States of America
as represented by the Secretary of the Navy
Filed Aug. 12, 1969, §er. No. 49,490
5 Ciairns. (Cl. 6G—39.69)
3,031,844
Patented May 1, 1962
2
6 thus forming the combustion chamber 21. The chan
nel shaped member 7 is provided with a plurality of
apertures 8 which permit air to enter the space between
the inner shell 5 and the outer shell 6 into the combustion
chamber 21, the inner shell 5 and the outer shell 6 be
ing ?xedly secured to the channel shaped members 7
by welding or some other suitable means of attachment.
The sections 3 and 4 are each provided with a pair of
fastening tabs 9 that are secured to the outer face of
The present invention relates to a combustion liner and
more particularly to a split combustion liner which may 10 the channel member 7. Fastening tabs 9 mate when the
readily be removed without prior removal of the turbine
sections 3 and 4 are properly aligned and they are then
assembly.
secured together by holding bolts 11. The manner in
which the inner joint 14 holds the inner shell 5 together
will be further explained below.
single unitary construction. Such design necessitated the 15
The outer shell 6 of each section 3 and 4 is provided
removal of the turbine assembly prior to removing the
with a pair of outer ?anges 20. The purpose of the outer
old combustion liner when it was necessary to make a
?anges 26} is to receive the dome plates 13 which com
replacement or to make a thorough inspection of the con
plete the outer shell 6 when fastened together by ?ange
dition of the combustion liner.
bolts 10.
The instant invention eliminates the above noted dis 20
FIG. 2 shows the combustion liner 2 disassembled to
advantages by making a sectional combustion liner. The
better illustrate the manner in which the various compo
combustion liner is made in two sections with fastening
nents ?t together. From this view it can readily be
means for holding the sections in position. A pair of
seen how dome plates 13 of the outer shell 6 overlap
overlapping plates are bolted to the upper and lower por
the inner ?ange 14 of the inner shell 5 and provide access
tions of said combustion liner to securely hold them in
thereto when dome plates 13 are removed.
Prior to this invention it has been the practice in the
art to make full annular type combustion liners of a
position.
Since combustion liners are subject to high tempera
tures and therefore need to be frequently inspected to
determine whether or not replacement is necessary, it
can therefore be readily seen that a combustion liner that
could be removed, inspected and/ or replaced without the
removal of the turbine assembly would be very desirous
since a considerable amount of time and money could
be saved thereby.
An object of the present invention is the provision of
a combustion liner which is easy to manufacture and can
be produced at a relatively low cost.
A further object of the invention is the provision of a
split combustion liner which permits inspection and re
placement without prior removal of the entire turbine
assembly.
Still another object of the invention is the provision of
a combustion liner which utilizes an overlapping spaced
?ange for hot region fastening of parts.
FIG. 3 is a view similar to FIG. 1 except here the
upper dome plate 13 has been removed to show the inner
joint 14- of the inner shell 5. The inner joint 14 is
fastened together by a plurality of recessed counter head
bolts 15.
FIG. 4 is a sectional view taken along the line 4—-4
of FIG. 1. This view clearly shows the outer joint 12
and the manner in which the ?ange 20 of the dome plates
13 and the ?ange 20 of the outer shell 6 engage each
other to form the outer joint 12. Once the flanges 20
are properly aligned, the bolts 10 are inserted through
the ?anges 2i} and then secured together. This type of
?ange connection is located at four places, two such
?anges 20 holding each dome plate 13 to the outer
shell 6.
FIG. 5 is a sectional view taken on line 5—-5 of FIG.
3 showing the manner in which the inner joint 14 is
secured. As shown, the inner shell 5 of the right-hand
section 4 is overlapped by the inner shell 5 of the left‘
Other objects and many of the attendant advantages of 45 hand section 3. Both sections 3 and 4 are provided with
a plurality of holes 16 through which recessed counter
this invention will be readily appreciated as the same be
comes better understood by reference to the following
detailed description when considered in connection with
the accompanying drawings wherein:
FIG. 1 shows an assembled View of a preferred em
head bolts 15 are inserted and then fastened by means
of nuts 18. The left-hand section 3 of the inner shell
5 is provided with dimples 19 to receive the flat head
bolts 15.
The use of air pick~up louvers directly in front of
dimples 19 and counter sunk bolt heads‘15 provide a ?lm
of cooling air over the top of the bolts and allows this
bodiment of the invention.
FIG. 2 shows the present invention of FIG. 1 disassem
bled.
FIG. 3 illustrates the preferred embodiment of the in 55 type of holding mechanism to function in extremely hot
vention with parts removed.
?ame conditions. The overlapping of ?anges also picks
up air for cooling. In addition to these advantages, the
FIG. 4 is a sectional View taken on the line 4-4 of
FIG. 1.
overlap on the inner shell permits less precision to be re
quired in holding tolerances on the sheet metal parts.
FIG. 5 is a sectional view taken on the line 5—5 of
As an alternative form, the inner joints 14 and outer
FIG. 3.
60
joints 12 may be reduced to tabs, or special fasteners
FIG. 6 is a sectional view taken on the line 6—-6 of
with holes or covering sleeves, to direct air for cooling
FIG. 3.
on both outer and inner shells.
Referring now to the drawings, wherein like reference
FIG. 6 which is a sectional view taken on the line
characters designate like or corresponding parts through
out the several views, there is shown in FIG. 1 an as 65 6-6 of FIG. 3 shows the combustion chamber 21 and
the manner in which the inner shell 5 and the outer shell
sembled combustion liner 2 which is formed of two sec
6 combine with the channel shaped member 7 to form
tions, namely, a left-hand section 3 and a right-hand sec
the combustion chamber 21. As pointed out above, the
tion 4. Each section is formed by an inner shell 5 and
member 7 is provided with a plurality of apertures 8
an outer shell 6 which are semi-circular in shape and are
which serve as air inlet openings to the combustion cham
70
spaced from each other a predetermined distance by a
ber 21. The inner shell 5 and outer shell 6 are also
channel shaped semi-circular member 7. It is this mem
provided with a plurality of openings 22 which permit
ber 7 that spaces the inner shell 5 and the outer shell
additional air to enter into combustion chamber 21.
3,031,844
3
4
After combustion takes place within chamber 21 the
2. In an engine having a turbine assembly, a com
pressor assembly, an annular combustion liner having
hot gases exit via outlet 23 which is of reduced area rela
tive to the cross-sectional area of chamber 21.
from a jet engine without prior removal of the turbine
assembly. The manner in which this is accomplished
spaced perforate inner and outer shells forming a com
bustion chamber therebetween, the improvement in said
annular combustion liner comprising a ?rst and second
semi-cylindrical section, each of said sections having a
perforate inner and outer shell, said outer shells having
is by ?rst removing the outer combustion casing of the
jet engine (not shown). After this is done, the combus
a ?ange at each end and extending over a lesser degree
of arc than said inner shells, said ?anges having holes
As previously stated above, the instant invention per
mits the removal of a full annular type combustion liner
tion liner outer shell 6 is exposed. Then the ?ange bolts 10 therein for receiving fastening bolts, a pair of dome
10 are removed, permitting the dome plates 13 to be
plates, said dome plates having a ?ange at each end,
Upon removing dome plates 13, the inner
said ?anges having holes therein permitting said dome
joint 14 isexposed and the recessed bolts 15 are then
removed. After this is done, the holding bolts 11 are
removed.
plates to be fastened to said outer shells to complete
said outer shell a pair of semi-circular channel shaped
. removed thus splitting the annular combustion liner into
members having apertures therein spacing said inner and
outer shells a predetermined distance, said shells being
two sections, sections 3 and 4.
It is to be noted that only the upper-half of the liner
has been unfastened, however, and it is to be understood
?xedly secured at one end to said ‘channel shaped mem
bers, inner joint means for releasably fastening said inner
shells of said ?rst and second sections, means for cooling
of the liner also.
said inner joint means, said ?anges on said outer shells
and said dome plates cooperating to form the outer joint
After the upper and lower halves have been unfas
means for releasably fastening said dome plates to said
tened, then the sections may be rotated and manipulated
in such a manner as to permit the liner to be removed
outer shells of said ?rst and second sections, said dome
in two sections without prior removal of the turbine
plates being of su?icient width to provide access to said
assembly.
25 inner joint means whereby said ?rst and second sections
Obviously many modi?cations and variations of the
may be readily removed from an engine without prior
removal of said turbine assembly.
present invention are possible in the light of the above
teachings. It is therefore to be understood that Within
3. In a device as described in claim 2 wherein said
inner joint means for releasably fastening said inner shells
the scope of the appended claims, the invention may be
practiced otherwise than as speci?cally described.
30 of said ?rst and second sections is formed by said inner
shell of said ?rst section overlapping said inner shell
What is claimed is:
1. In an engine having a turbine assembly, a com
of said second section, the overlapping portions of said
shells having a plurality of aligned apertures for receiving
pressor assembly, an annular combustion liner having
fastening bolts.
spaced perforate inner and outer shells forming a com
4. In a device as described in claim 3 wherein said
bustion chamber therebetween, the improvement in said 35
that the same steps are to be taken on the lower-half
annular combustion liner comprising a ?rst and second
semi-cylindrical section, each of said sections having an
inner and outer shell, said outer shells having a ?ange
at each end and extending over a lesser degree of arc
means for cooling said inner joint means is formed by
said ?rst section overlapping said second section in
such a manner as to scoop up air passing therethrough
whereby this type of joint means can function properly
than said inner shells, said ?anges having holes therein 40 in extremely hot ?ame regions.
for receiving fastening bolts, a pair of dome plates having
5. In a device as described in claim 2 wherein said
means for cooling said inner joint means is formed by
a ?ange at each end, said ?anges having holes therein
said ?rst section overlapping said second section in such a
permitting said dome plates to be fastened to said outer
manner as to scoop up air passing therethrough whereby
shells to complete said outer shell, inner joint means
for releasably fastening said inner shells of said ?rst and 45 this type of joint means can function in extremely hot
?ame regions.
second sections, means for cooling said inner joint means,
said ?anges on said outer shells and said dome plates
References Cited in the ?le of this patent
cooperating to form the outer joint means for releasably
UNITED STATES PATENTS
fastening said dome plates to said outer shells of said
?rst and second sections, said dome plates being of suf?
cient width to provide access to said inner joint means
whereby said ?rst and second sections may be readily
removed from an engine without prior removal of said
turbine assembly.
58,648
Joy __________________ __ Oct. 9, 1866
2,537,054
2,645,081
Hildestad ______________ __ Jan. 9, 1951
McDonald ___________ __ July 14, 1953
2,760,338
2,988,886
Keast ______________ __ Aug. 28, 1956
Hamm ______________ __ June 20, 1961
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