close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2066806

код для вставки
_ _ Jan. 5,1937.
‘
JftsMlTl-l ET AL
y
‘
4
2,065,806
OIL BURNER
'
Filed Dec. 2, 19:55 ‘
,
'
2 sheets-sheet 1
5
.
‘1"4@ 2%,.2.
l
JàH/v SM1 TH A ND
BY VIPs/L. f. Dusar/.ER
Jan. 5, 1937.
>
`
-‘
J. SMITH ET AL l
-
'
OIL
'
.
36
2 Sheets-Sheet 2
.
Y
.
37
2,066,806
BURNER
vFiled Dec. 2, 1935
'
'-
INVENTORk
.
JöH/v SM/TH AND
_
BY WPG/L E. .DUEMLER
ATTORNEYS
Patented Jan. 5, 1937
I2,666,306 »
UNITED srivrEs- _PATENT
v
'2,066,806
on. Burman
OFFICE
_
-
" -`
John Smith, Southwlck, and Virgil E. Duemlcr,
y West Springiield, Mass., assltnorsto Gilbert ¿t
Barker Manufacturing Company,- West Spring-'
iield, Mass., a corporation o! Massachusetts
Application December z, 1935, smal No. saisz
4 claims.
`This invention relates to improvements in oil
burners.' ,
`
’ The invention has for an object the provision
in a gun type burner of improved means for d1
5 recting air >to the oil, characterized by the pro
duction of a steady, stable and quiet name of
high temperature and by improved eiiiciency ci
combustion.
‘
I
,
‘
(criss-_76) -
"
of a mist or '-fog. This nozzle is secured to one
end of a cylindrical support II and located near
the open outlet end of an air> tube I2, having
' at‘such end a deiiector I3 to` direct air inward
ly_ toward the oil spray.' nir at relatively low s
pressure is supplied to tube I2, near its other
end, by afan I 4 driven by a motor I5,--the fan
casing being located above tube I2 and formed
as an integral part thereof.
More particularly,- it is an object `of the in
10 .vention to provide in a burner wherein the air is
The fan end of tube I2 is closed by a head I6
fedto the oil in a‘plurality of generally con
held in place by cap screws AI1 and capable of
centric, annular streams, a novel form of spac - being easily removed to enable servicing of the
ing of the outlets, through which said streams nozzle I0 and aœociated parts. A pair of rods
issue, whereby an annular area of low pressure
I8 iixed inhead I6 by _set screws I9 in a manner
1% is created between said streams into which one
oi them may in part expand and form, in ei
fect, an intervening stream of lessened velocity,
thereby securing an improved and graded dis
to enable 4adjustmentoiï the rods in a direction 1%
longitudinally of the tube I2, extend forwardly in
said tube and are suitably fixed, as by the screw
threads shown in Fig._ 2, to an air dividing and
tribution of the air along the flame to effect pro- l directing member 20 which is slidable in the tube.
20 sressive combustion.
`
This member 20 -supports a pair of insulators 2i, , I,
Another object of the invention is to provide in
a burner of the class described, means for’caus
ing the outer air stream to whirl around the axis
carrying the ignition electrode rods 22 which ter
minate in electrodes 23 positioned in igniting
relation with the spray from ,nozzle Ill. The
of theoil nozzle, and an arrangement whereby
insulators 2i pass through and are -slidably ad
justable in a longitudinal direction in member 20
2g an inner portion oi’ the outer air stream is en
` abled to expand radially inward and envelop the
oil stream at a point close to but slightly beyond
Athe location where the inner air stream meets
the oilstream, and in the zone of gasiilcation of
80 the oil,--said inner portion of the whirling air
stream acting to whirl the gasified oil in a zone
between the oil nozzle and the normal zone of
A bracket 26 in
terconnects the two rods I8 and is adjustably
ilxed to each by a set screw 21.
The nozzle sup
port II passes through bracket 26 and is iixed 6,.,
thereto by a set screw 28. Thus, by removing
head I8, the nozzle I0, air _director 20 and spark
application of the outer air stream to the oil. _
electrodes may be withdrawn as one unit, with
These and other objects will more particularly
appear as the detailed description proceeds and
will be pointed out in the appended claims.
The invention will be disclosed with reference
‘to the accompanying drawings, in which:
Fig.v 1 is a side elevational view, partly in sec
tion of an oil' burner embodying the invention;
Fig. 2 is a fragmentary sectional elevational
view, taken similarly to Fig. 1 but showing only
the outlet end oi' the burner and drawn to a
outdisturbing the relationship `oi? these parts.
larger scale;
-
Figs. 3, 4 and 5 are cross sectional views taken
on the lines 3_3, 4--4 and 5--5, respectively, of
Fig. 2; and
l
`
\
v
Fig. 6 is a fragmentary sectional elevational
view showing a modification. ‘
50
and are ñxed in their positions of adjustment by
set screws 25 in member 20.
_
Referring to these drawings; the burner is of
the pressure atomizing type, having a nozzle IIJ
v,to which oil is supplied under relatively high
pressure and from which the oil is emitted
„in a substantially hollow conical spray of finely
A 55 divided. particles andA practically in the `form
Oil is supplied to the/nozzle by any suitable y,
means, usually a pump (not shown) driven by
motor I5, and passes 'through piping, indicated
in part in Fig. 1 at 29, to the» nozzle support II.
The piping 29 enters the air tube through a radial
'.slot in the inner face of head IB, as indicated in -`
Fig. 1. The support I.I is also an oil conductor.
It isbored out, as shown in Fig. 4, to receive a rod
30 which has a longitudinal groove 3| in its
`periphery and which ñlls the bore and closes it
except for the' groove 3|. This groove intercon- ‘15
nects the piping 29 and nozzle III. The‘nozzle
support is or may be constructed as and furthe
purposes disclosed in U.V S. Patent No, 2,015,572,
granted September 24, 1935, on an invention of
L. F. Spear.
.
The burner is supported, preferably in a man
ner to enable vertical adjustment, by a standard
32 connected at its upper end to the air tube I2.
The outlet end of this tube passesthrough the u
2
- 2,066,806
furnace wall 33 and opens into the combustion
chamber 3l’ thereof.
The burner, as thus far described, is of a gen
erally old and well known type and it is thought
unnecessary to a proper understanding of the
present invention to describe it in further detail.
It will be understood that the burner illustrated
is given merely as one example of many burners
of the pressure atomizing type, in which the in
10 vention may be embodied. The invention does not
depend on the constructional details described in
connection with the burner and is independent of
.
them.
, .
l The invention features a special construction of
inner air stream which envelops it at a location
very close to the tip of nozzle Il. This inner
stream initially is of relatively high velocity and
'acts to shape the oil spray and prevent undue
radial spreading thereof. The forward course of
the inner air stream is shown by the arrows l5 in
Fig. 2. Some mixing of air and oil occurs here
but the mixture is necessarily'_ rich because the
air supply is small. The inner air stream, after
it leaves the air nozzle Il, rapidly expands and 10
is soon dissipated so that its effectiveness in
holding the flame within bounds is very soon lost.
The outer air stream is then made to act on the
flame and confine it within bounds in a novel
the air-directing member 2l. This member, in
the form shown, is roughly cup-shaped, having
manner.
an annular rear wall 34 disposed transversely of
tube I2 and an integral and forwardly projecting
to whirl or rotate and envelop the flame. 'I‘he
outer and whirling air stream `at the point oi its
emission (at the _forward end face of tubular
part 35) is spaced radially _a substantial distance
from the inner air stream, and there is a substan
tial space between these streams. Therefore, the
annular ñange or outer tubular part 35, mounted
in spaced coaxial relation with tube I2 and form
ing an outer annular air pasage 31 of`relatively
large area. The indenting of the front face of
The outer stream is caused by the vanes 36
this member is'largely for the purpose of saving . outer air stream, in part, expands radially inward _
metal and except for the undesirable bulk, the
member could be truly cylindrical. Integral vanes
l36 project radially outward from the outer periph
ery of ñange 35 at suitably spaced angular‘in
tervals and these vanes engage the inner wall of
tube I2.A These vanes are inclined to the direc
30 tion of the air flow in tube I2 and substantially
of spiralform. They operate, as is well under
stood in the art, to whirl the air passing through
the'passage 31. The wall 34 is bored out to receive
a tube 38 having an internal diameter- greater
35 than the support II, which passes through it in
toward tube 38 and flows forwardly along the
same (as indicated in Fig. 2 by the arrows 46) y
and then inwardly along the outer surface of
nozzle 40 to meet ‘the flame at a point close to the
outlet of nozzle 40, or at about the point where
the inner air stream loses its effectiveness on the
flame. 'I'his action is, we believe, a very im
portant factor contributing to the exceptional re
sults in combustion which aregsecured from this
burner. A portion of the whirling outer air
stream is made to act onthe flame in a zone in
termediate the two zones where the inner and 35 „
coaxial relation, whereby an inner air passage 38 . outer air streams would act in a burner of con
of annular form is provided. This passage 39 is
relatively small in cross sectional area as com
pared to passage l1 and only a small portion of
the air supply passes through it. The outlet end
of the inner air tube I8 has iixedthereto a deflec
tor or nozzle Il to direct the inner annular air
stream toward the oil spray. The tube 3l is ad
justable longitudinally in theair director and is
45 held in adjusted position by a set screw 4I (Fig.
1). The nozzle- support II is .supported at its
forward and nozzle-.bearing Aend and centered in
the tube 38 by three ñns 42 which extend radially
inward 'from the tube and engage the cylindrical
50 part 43 of the support I I. The shoulder u on
support I I is adapted to abut the ends of vanes 42
as shown. 'I'he vanes 42, as herein shown, are
straight and parallel to the direction of air flow
in tube I2.
40
ventional form. This portion of the outer air
streamis made to whirl the gasified oil in the
zone where the whirling has heretofore been
effected by vanes in the inner air passage. Thus, 40
one set of vanes accomplishes the work of the
two sets often used. 'I‘he result is a necking down
of the llame into more or less cylindrical form
for a short distance, as illustrated at 41,-say
a littlebeyond the outlet end of deilector I3. .
The zone between the latter and the nozzle is
one of ignition and gasification. Here, the oil
is gasified, as it must be in order` to burn, and
combustion for the most part occurs lbeyond the
defiector I3.\ Therefore, the part of the outer
air stream which expands as described, acts on
the gasifled oil in the gas zone, whirling it around
and around to improve the mixture and hold the
flame confined in the shape shown. Necessarily,
this air has relatively low velocity in a forward 55
55
In operation, the oil supplied under high pres
sure to nozzle III is emitted from the latter in the direction because it is travelling in a spiral path
form of a spray of very ñnely divided particles and because it has expanded in a radial direc
and in substantially the shape of a hollow-_ cone. tion. (The arrows show simply the general for
Actually, the spray is almost like a mist or fog. ward direction-of the air vand no attempt has
60 Surrounding that 4portion of the spray which is been made to show the actual spiral path of the
visible, is a zone of invisible spray and the spark outer air.) It thus tends to hold the oil longer
from the ignition electrodes usually extends only in the zone of gasification and thereby much n
into the zone of this halo-like invisiblespray. .better and more thorough gasification and mix-'
Ignition occurs initially in this zone rather than ture-occur, as is evidenced by the bluish color oi'
65 in the visible part of the spray. The arc-like the flame in this zone. The oil is slowed up in its 65
forward travel long enough to enable thorough
spark from the electrodes is distended by the outer gasification to occur. Naturally a condition of
air stream and blown into the invisible oil spray. partial vacuum exists in the space between the
The latter ignites in a flash which is almost in
stantaneously transmitted to the visible spray to
70 ignitek the latter. The oil issuing from nozzle I0
vent it from drifting away from the nozzle I0,
' ' rapidly expands and would spread out radially to
thus resulting in a very quiet and stable flame.
a large extent except for the action of the two air
streams. -The oil spray, initially in the form of a
76 hollow cone, is subjected first to the action of the
outlets of the two air streams and this has a re
tarding effect on the flame and also tends to pre
The outer portion oi.' the outer air stream follows
the usual course (indicated roughly by the ar
rows 48) and meets and envelops the fiame-out- 76
3
- 9,666,806
side the' nozzle I3, supplying the air to support
combustion of the-gasiiie'd oil. In'the zone out
side the nozzle' I3, which is the primary combus
tion zone, the flame is whitisha'nd it „terminates
in the secondary 4combustion mne (not shown) .
with orange colored' tipa-an indicationofthe
. proper amount of air supply.
electrodes' and their insulators can be passed
through the annular wall 34 and thus kept out of
v the air' passages.
Necessarily, if these elements
were inserted in air passage 31, they would in
'I'hefiame has a
hollow center 50 in which there is some recycling
'of the products of combustion and here there is
terfere with the equal distribution of air flow
to the flame. By'the present arrangement, the
:liso a certain amount of turbulence indicated at
10
that‘part of the outer stream can expand and
form an intervening str_eamof less velocity, en
able another desirable result to be obtained. The
electrodes and their insulators are kept out of
'the way where they have no deleterious effect on _
It is to be particularly-noted that the arrange
the air streams.
'I'he inner Vairstream may be whirled, as by
the vanes 49 shown in Fig. 6. The ordinary ad
vantage of whirling this stream has been secured 15
by the arrangement described,whereby the .whirl- '
ment described results in a very effective and
graded air distribution. Instead of concentrat
15 ing the air supply at two fixed zones, some of :the
air of the outer air stream is fedto the flame at
various points between these -zones, thus dis
20
.ing effect of -the outer streamis transmitted toa
tributlng the air along the iiame to .secure pro
location close to the nozzle where it can V'.do'much`
gressive combustion.
of the work which would ordinarily'be expected
v
‘
-
'
'I'he air directing means also 'is eii’ective over a
of .the whirling inner stream. `The inner vvanes
4Q are, therefore, only necessary where a whirli
ing -eifect of increased intensity is desired. In
most cases, we find it preferable to omit vanes 49
wide range. Its construction '._is such that the
results described are obtained with such means
independently of-the amount of oil burned and
thevelocity of the air, overa considerable range.
25
`because their use results inl expanding the name `
into saucer-like form, which in most cases is l,
not desired. Where conditions are such -as to
The arrangement also results in better com
lbustion due to a more thorough gasification
a'nd a 'more thorough and uniform mixing of the
air and oil. A flame of higher temperature is
make a flame of this shapedesirable, lthe vanes _
49 can be usedto advantage.
~
secured-a highly radiant one and one of short '
bushy»
character. -The ñame- is exceedingly
`
stable and quiet. Ignition is sure and carbon
lation with the oil nozzle and results in a better y
mixing of the air and oil 'with resulting greatly
improved combustion, and inthe production of
Vization is reduced to a degree where it ls prac
~tically negligible. »Eiilciency 'of combustion is
35 "
very much improved as proved by actual tests. , a iiame which is short and bushy in form, con
’I'he >relative longitudinal positions of the noz-yr sistently steadyv and stable, quiet. and of excellent
zle Ill, cone 40, air director- 20 and defiector I3 ~
quality.
_»
'as
-
What we claim is:
may be varied within limits and, by so doing,
variations can be eiiected in the shape of `the
1. In yan oil burner, a tube through which air-is
flame. The illustrated relationship between these
supplied Aand having a contracted outlet end, a
nozzle for emitting a substantially conical spray
of oil, ‘said nozzle located in said tube near the
-40 parts is what we .consider to be the best and
most effective. 'The assembly of nozzle IB, ycone
40 and air 4director 2li may be, moved «longitudi
v nally relatively to'deiiector I3', _asby loosening
screws I9 (Fig. l) and pushing'rods Il more
deeply into their sockets in head I-B or pulling
them out fartherin such sockets. If such as--'
sembly is moved toward deilector I3, the flame is
widened very decidedly and if moved backwardly.
lthe flame is narrowed slightly. The .cone "40 and
50. nozzle Il_l may be Àmoved relatively to the air di~
rector 20 and defiector I3. To do this, screws 28
"55
'I'he ,invention provides an improved form of air
dividing and directing- means in cooperative re
outlet end thereof, an inner tubular member'sur
rounding said nozzle in spaced relation forming
an annular passage through which air iiows and
from which it is directed to the sprayed oil in a. ~'
zone near the nozzle, an outer member spaced in-y
wardly from said tube to form an outer annular
passage through which air ñows to said contract
.ed outlét and is directed to _the sprayed oil beyond
and 4i are loosened, ltube 40 is pushed back or
said zone, a partition connecting said members
and blocking iiow of air except through said pas
sages, and .means for whirling the outer air
pulled“ out to the desired degree _in member l20.
and support Il, is moved until the shoulder-44
abutsthe ends `oi.' vanes 41, when the nozzle I6
and cone 40 will be in the same yrelationship as`
ciently to create a substantial annular space be
tween them into which the inner part oi' the
outer air stream may expand and form an inter
formerly. 'I'he eii'ect of such movement, if back
ward, i's to narrow the ilame and, if foäward.
to broaden the flame. The nozzle I0 ‘maybe ad
stream, said passages being radially spaced sum
vening annular air stream _of less velocity than
the outer part of the outer air stream.v
2. In an oil burner, a tube through which air
00 justed longitudinally without moving .the parts
I3. 2li and 40, by'loosening the screw 2l and
moving the nozzle support Il. The nozzle should
not be moved rearwardly from the illustrated
position. It might be moved forwardlyrprovided
is supplied and having a contracted. outlet end, a f
nozzle for emitting a. substantially conical spray
of oil, said nozzle located in said tube near the
. outlet end thereof, an inner tubular member sur- .
rounding said nozzle in spaced relation forming
an annular passage through which air iiows and _.
65 that the locating plan described.' involving ab'ut
ment of shoulder 44 with the ends of vanesv 4I
were dispensed with.- The effect would be to
from which it is directed to the sprayed Aoil in a.
zone near'the nozzle, an'outer member spaced in
broaden out the flame. `Other adjustments may - wardly from said tube to form an outer annular
be made, if desired.- For example, the element 2l
70 may be moved toward or away from' the deflector
’ I3 leaving the cone 40 andnozzle Il positioned
as shown, but the‘ones above enumerated are the
passage throughwhich air iiows to said contract~
ed outlet and is directed to the sprayed oil beyond 70
said zone, a partition connecting said members'
and blocking flow of airl
` ` cept
through said nur ,
`
sages, and means for" whirling the outer air
It should be particularly notedl that the means - stream, the outlet end oi' the outer air passage
most desirable ones and those usually used.
.
75 used to space the inner and outer air streams so
being substantially separated in a radial'direc- g5
4
2,066,866
tion and spaced rearwardly in the tube from the
outlet end of the inner passage. whereby the
4. In an oil burner, a tube through which air
is supplied and having a contracted outlet end.
whirling outer air stream as it leaves the outlet
of the outer air passage may in part expand ra
a nozzle for emitting a substantially conical
spray of oil, said nozzle located in said tube near
the outlet end thereof, an inner tubular member
dially inward and mix with the sprayed oil in a
zone adjacent the outlet of the inner air passage. surrounding said nozzle in spaced relation form
3. In an oil burner, a tube through which air ing an annular passage through which air flows'
is supplied and having a. contracted outlet end, a and from which it is directed to the sprayed oill
nozzle for emitting a substantially conical spray» Y in a zone near the nozzle, an outer member spaced
of oil, said nozzle located in said tube near the inwardly from said tube to form an outer annu 10
lar passage through which air flows to said con
-outlet end thereof, an inner tubular member sur
rounding said nozzle in spaced relation forming
an annular passage through which air flows and
from which it is directed to the sprayed oil in a
zone near the nozzle, an outer member spaced in
wardly from said tube to form an outer annular
passage through which air ilows to said contract
ed outlet and is directed to the sprayed oil be
yond said zone, and a partition connecting said
members and blocking ilow of air except through
said passages, said passagesbeingradially spaced
sufficiently to create a substantial annular space
‘ between them into which the inner part of the
outer air stream may expand and form an in
tervening annular air stream of less velocity than
the outer part of the outer air stream.
tracted outlet. and is directed to the sprayed oil
beyond said zone, and a partition connecting said
members and blocking' ñow of air except through
said passages, the outlet end of the outer air pas 15
sage being substantially separated in a radial
direction and spaced rearwardly in the tube from
the outlet end of the inner passage, whereby the
outer air stream as it leaves the outlet of the
outer air passage may in part expand radially 20
inward and mix with the sprayed oil in a zone
adjacent the outlet of the inner air passage.
JOHN SMITH.
VIRGIL E. DUEIMUJER.
Документ
Категория
Без категории
Просмотров
0
Размер файла
735 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа