close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2108872

код для вставки
Feb. 22, 1938.
c, E, swALLow
2,108,872
OIL BURNER
Filed Jan. 13, 1956 -
Fig.1.
.
% Z47
,
.
5
"H3233
\nvenTor.
Chu?es E. Swallow
Patented Feb. 22,1938
Q 2,108,812“
UNITED. STATES
PATENT‘ OFFICE
3.108.812
ommmm
,
Charles 3. Swallow. Wm, Mass.
Application January 1:, 1m, Serial No. 5am
'
: (?aims.
This invention relates to oil burners and par-‘
ticularly to an oil burner designed for industrial
low temperaturework.
.
My invention is embodied in an oil burner of the
5 type having a rotary nozzle, and one object of
the invention is to provide an oil burner of this
type which is highly e?lcient and in which the oil
will'be thoroughly atomized and mixed with the
air to provide the combustible mixture.
In many burners having revolving nozzles a
considerable vacuum is created at the end of the
nozzle when the burner is in operation, and the
presence of ‘such vacuum tends to retard the ?ame
and also tends to counteract the atomization of
15 the oil and to cause more or'less oil to gather in
10
drops at the delivery end of the nozzle. Another
object of my invention is to provide improvementsv
in burners having revolving nozzles by which the
creation of such a vacuum, at the end of the re
20 volving nozzle, and its deleterious eil'ects is elim
inated.
'
In carrying out my invention I employa housing
having an air inlet and a nozzle portion present
ing an air outlet, and I also employ a rotary
25 nozzle situated axially of the air outlet and form
ing with the nozzle portion an annular passage
for the discharge of air. The rotary nozzle is pro
vided with a portion of progressively-decreasing
diameter extending through and beyond the
30 nozzle portion of the housing and which gives
the nozzle a streamline e?ect that prevents the
rormation of a vacuum at the end of the rotary
element. This rotary nozzle is rotated rapidly by
the air passing through the housing‘ from the in
let to the outlet and the parts are so constructed
that the air delivered from the circular air de
livery opening will be given a whirling movement
in one direction, while the oil is delivered out
wardly into the whirling air current with a
40 whirling motion which is opposite to that of the
air. The impact of the whirling oil jets with the
oppositely-whirling air results in a line atomiza
tion of the oil and complete mixture _of the oil
with the air, thus producing a highly?semcient
45 combustible mixture.
In order to give an understanding of the inven
tion I have illustrated in the drawing a selected
embodiment thereof which will now be described
after which the novel features will be pointed out
50 in the appended claims.
In the drawing:
Fig. 1 is a sectional view of a burner embody
ing my invention.
(c1. isa-m
Fig. 3 is a fragmentary edge view of the rotor
portion of the nomle; and
.
Fig. 4 is a
atic view illustrating the
manner in which the oil and air are mixed to
produce the combustible mixture.
'
5
My improved burner comprises a housing mem
ber I having an air inlet opening 2 and a nozzle
portion 3 provided with an air discharge opening
4. The nozzle portion 3 is shown as formed in
aseparate piece from the body of the housing I 10
and it is detachably secured thereto through suit
able bolts 5. The rotary nozzle member is indi
cated generally at 6 and it is provided with a body
portion 1 which is rotatively mounted on a tubu
lar extension 8 integral with the body of the 16
housing and projecting into the nozzle portion
3. Suitable ball bearings 9 are provided for ro
tatively supporting the nozzle member ‘6, there
being two separate ball bearings which are spaced
by the sleeve III that is secured ‘to the tubular 20,
extension 8 by means of a set screw II. The in
ner end of the body 1 extends beyond the inner
bearing 9 and a retaining ring I2 is secured'with
in the inner end of the body ‘I by means or set
screws l3. This retainer ring l2 prevents outward 25
longitudinal movement of the nozzle member.
The nozzle member 6 has a portion M of pro
gressively-decreasing diameter extending through
and beyond the air discharge opening 4, the pro
jecting end portion l5 of the nozzle being closed 30
and preferably being rounded as shown. The
nozzle is formed with an interior oil chamber it
into which oil is fed through a port I‘l extending
axially of the tubular extension 8, the supply oi.’
oil from the oil inlet ll being controlled by the '35
usual needle valve l9.
'
The oil chamber it of the nozzle communicates
through openings 20 with an annular chamber 2|
having an annular discharge opening or port 22
which is situated just beyond the end of the nozzle 40
portion 3 of the housing.
A
Provision is made for rapidly rotating the nozzle
during the operation of the burner, for which
purpose said nozzle is provided with a plurality
of vanes 23 which are acted on by the air travel
ing through the chamber 244st the housing from
the inlet 2 to the discharge opening 4.
The air delivered to the inlet 2 may be under
relatively low pressure, but as the air passes
through the vanes 23 it gives the nozzle a rapid
rotation so that the oil delivered from the an
nular discharge opening 22 will be thrown out
wardly with a rapid whirling motion. The means
Fig. 2 is a transverse sectional view of the nozzle 7 for rotating the nomle also results in giving the
annular stream of air, which is delivered through 55
taken through the vanes 23.
2,108,878
" the annular discharge opening I, a whirling mo
tion in ‘the opposite direction to that of the oil,
the result being that the annular stream of oil
which is whirling in one direction is thrown
outwardly into an annular stream of air which
is whirling in the opposite direction. The result
of this is that the oil becomes very thoroughly
atomized and mixed with the air, thus producing
an extremely e?lcient combustible mixture.
This opposite whirling motion of the air and
10
the o? results from the character of the vanes 23.
The vanes are so constructed that-the two‘ ad
jacent faces 25, 20 of any two adjacent vanes are
parallel with each other, as shown in Hg. 2, and
15 are inclined relatively to the axis, as shown in
Fig. 3. Because of this parallel arrangement the
- space 21 between any two adjacent vanes 23 has
the same width at the periphery of the vanes as
at the base thereof so that as the moving cur-~
20 rent of air strikes the faces II of the vanes. as
shown by the arrows a in Pig. 3, there is no
tendency for the air to ?ow off from the ends of
the vanes but the full velil‘ect of the air pressure
is transmitted to the vanes to give a rotary mo
25 tion to the nozzle in the direction of the arrows
c. As the air passesout from the spaces 21 it
is given a whirling motion in the direction of
' the arrows b and this whirling motion is in an
opposite direction to that in which the nomle is
By‘. this means the spray ofoii will be
delivered outwardly from the annular space 22
into the annular sheet of air which is issuing
from the air delivery opening 4 with'a whirling
motion in a direction opposite to that of the
35 stream of air. This is shown diagrammatically
30 rotating.
in Fig. t which may be considered as a view
looking toward the nozzle from the right. In
vanes causes the nozzle member to rotate and
produces a whirling motion in the air passing
through the annular air delivery passage, and
means for delivering oil to said interior chamber,
said nozzle member being provided with an an
5
nular oil chamber open at one end on the exterior
thereof at a point Just beyond the nozzle portion
of the housing, said nozzle member also being
provided with communicating passages between
said annular chamber and the interior chamber.
2. An oil burner comprising _a housing having
an air inlet and a nozzle portion provided with a
discharge opening, a rotary nozzle member sit
uated axially of said discharge opening and
forming with the wall thereof an annular air de 15
livery passage, said nozzle member having an
interior chamber and a closed end projecting
beyond the nozzle portion of the housing, vanes
extending radially from the nozzle member with
the adjacent faces of any two adjacent vanes 20
parallel to each other and inclined to the direc
tion of air ?ow, whereby the impact of the air
passing through the housing against the vanes
causes the nozzle to rotate and produces a whirl
ing motion in the air passing through the an‘
nular air delivery passage, and means to deliver
oil to said interior chamber, said nozzle member
having an annular oil chamber opening at one
end on the exterior thereof and also having com
municating passages between said annular 30
chamber and the interior chamber, the rotary
motion of the nozzle member delivering the oil
from‘the open end of the annular oil chamber
outwardly into the whirling'stream of air and
with a whirling motion opposite to that of the
stream of‘air.
»
r
'
3. An oil burner comprising a housing having
said Fig. 4 the circular row of arrows b indicates an air inlet and a nozzle portion provided with
a discharge opening, a rotary nozzle member
the direction of whirling motion of the air issu
40 ing from the annular port I, and the arrows 11 situated axially of said discharge opening and 40
indicate the whirling motion of the oil issuing forming with the wall thereof an annular air
from the annular discharge opening 22. Because delivery passage, said nozzle member having an
of the rotative movement of the nozzle the oil is interior chamber and a closed outer end which
thrown outwardly in approximately a tangential projects through and beyond the nozzle portion
45 direction and will thus be directed against the of the housing, the portion of the nozzle member
oppositely-whirling sheet of air illustrated by the which thus projects through and beyond the
arrows b in mg. 4.
housing having a progressively decreasing di
The progressively-tapered shape of the por
ameter in a; direction toward said closed end,
tion 6 of the nozzle together with the fact that vanes extending radially from the nozzle mem
50 it projects beyond the nozzle portion I of the ber and having inclined faces whereby the im
housing gives to the nozzle a streamline effect . pact of the air passing through the housing
which permits the air and oil mixture to ?ow off against the vanes causes the nozzle to rotate
from the end of the nozzle without creating any and produces a whirling motion of the air passing
vacuum at said end, the presence of which has a through the annular air delivery passage, and
55 detrimental effect on the operation of the-burner. means to deliver oil to said interior chamber of 55
I claim:
the nozzle member, said nozzle member having
1. An oil burner comprising a housing having on its exterior an annular discharge port and also
an air inlet and a nozzle portion provided with. having passages which form a communication
between said port and said interior chamber and
a discharge opening, a rotary nozzle member sit
through which oil ?ows from said chamber to
uated axially of said discharge opening and form
said discharge port, the rotary motion of the
ing with the wall thereof an annular air de
livery passage, said nozzle member having an I nozzle member delivering the oil from said an
. interior chamber and a closed end projecting
nular discharge port outwardly into the whirling
beyond the nomle portion of the housing, vanes
stream,- of air and with a whirling motion opposite
to that of the stream of air.
65 extending radially from the nozzle member and
having inclined faces whereby the impact of the
airpassingthro'ughthe houslngagainstthe
CHARLES E. SWALLOW.
Документ
Категория
Без категории
Просмотров
0
Размер файла
343 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа