вход по аккаунту


Патент USA US2287652

код для вставки
June 23» 1942»
Filed Nov. 26, 1940
2 Sheets-Sheet 1
June 23, 194.2.
Filed Nov. 2e, A1940
2 sheets-sheet 2
Patented `Íune 23, 1942
Hermannus van Tongeren, Heemstede,
Application November 26 , 1940, Serial No. 367,295
In Germany No vember 24, 1939
` zclaims. (C1. 18s-91)
This invention has for its object an improved
which is arranged near the top and the other
spark arrester, which may be used for various
near the bottom. Both cyclones communicate
purposes, and is particularly adapted to be mount
with the interior of casing 5 through relatively
ed in the exhaust conduit or chimney of large
short skimming openings I5 and I 6, respectively.
marine Diesel engines. My-novel spark arrester
ï Mounted inside the vaned wall I2 and in con
is of very simple and light construction, occupies
centric relation therewith is a perforated cylin
little space and offers a Very low resistance to the
der 20, which acts as a silencer. Provided within
flow of the exhaust gases.
said cylinder are a number of long, radial baille
According to this invention, my novel spark
walls Il, and arranged intermediate said baille
arrester comprises, in addition to a substantially 10 walls
are shorter baiiies I8. Preferably said baf~
cylindrical and preferably vertically arranged
composedwof sound absorbing material,
casing having inlet and outlet openings of sub
for instance glass or'steel wool, and in that case
stantially equal sizes and accommodating in
spaced relationship with its bottom wall a sube
stantially vbi--ccnical defiection member, a sub
stantially circular series of baille vanes extending
in coaxial relation with the casing from said
deflection member unto the top wall of the casing,
and a second substantially circular series of spin
each baille may comprise two spaced, perforated
metal sheets, the interspace being filled up with
said sound absorbing material.
The described spark arrester, which, for in
stance, may be mounted in the chimney of> a mo
tor vessel o1' of a locomotive, operates as follows.
The exhaust gases and any incandescent par
ning vanes extending from> said deilection meni 20 ticles suspended therein enter at 8 andiiow in
ber unto the bottom wall of the casing, wherein
a more or less axial direction through the pas
the diameters ci the casing and of the deflection
sages between the spinning vanes II into the
member do not exceed twice and one and a half
annular eddy space confined between the casing
times, respectively, the diameter of the inlet and
wall 5 and the circular set of baille vanes I2.
outlet openings, and wherein the circumferential 25 The spinning vanes II are so disposed as to im
wall of the casing is` provided with at least one
part additional rotary movement to said gases.
skimming opening communicating withY a cyclone
This movement, indicated by the arrow I 9, causes
arranged outside the> casing. ’
the sparks and» other particles contained in the
In order that my invention may be more clearly
gases to be‘thrown outwardly and to be dis
understood, I shall proceed to describe the same 30 charged, together with a small portion of the
with reference to the accompanying drawings,
gases, through the skimming openings I5, I6 into
which show, to someextent diagrammatically,
the cyclones I3, I4. VFrom the cyclones, the solid
two embodiments of my novel apparatus.
particles are delivered to a bunker (not shown),
Figs. 1 and. 2 are a sectional elevation and a
whereas the cleaned gases are conducted, for in
cross-sectional View, respectively, of the ?rst em 35 stance, into a chimney. Preferably, each cyclone
I3, I4 is provided with an individual bunkerI
Figs. 3` and 4 show, in> similar Views, the second
The gases gyrating around the set of vanes I2
are obliged, in order to reach the outlet 9, to
Referring to Figs..1 and 2, the spark arrester
pass through vthe passages between said vanes.
comprises a cylindrical casing 5 having frusto 40 These passages extend, as appears from Figure 2,
conical bottom> and top >walls 6 and "I, respective
in a direction substantially opposite that of the
ly, said walls being provided with coaxial and
of the gyrating gases, so that the latter,
equally sized inlet and outlet openings 8 andâl,
when entering Vsaid passages, are suddenly de
respectively. '
flected through an angle of about 150°. The
Some distance from the bottom 6 there is ar~ 45
heavier particles contained in the gases are, owing
ranged a hollow, bi-conical member III, and
their inertia, prevented from following said
mounted between ythis member and the bottom
change of direction, so that they impinge »on the
ring I5 .is a circular series of spinning or whirl '
vanes I2 and thereby rebound into the rotating
producing vanes I I. The circumference of mem
ber I0, which acts as a de?lector, is connected 50 mass of gases. Since the baille vanes I2 only
serve the purpose of changing the direction of
with the top ring 'I through a circular set of
now of the gases on their way from the annular
more or less tangentially disposed baffle vanes I2,
eddy space to the outlet 9, they may be con
said set being concentric with casing 5.
as streamlined bars or tubes.
Outside the casing there are provided two
The baille walls I'l, I8 cause the gases to reach
relatively small cyclones I3 and I 4, the Iirst oi 55
the outlet 9 in a steady, axial flow and thus
reduce the resistance of the spark arrester.
Moreover, they act as sound absorbers, particu
larly as far as the higher frequencies are con
cerned. The lower frequencies are already part
ly damped in the hollow member I0. This mem
ber, which is accommodated within the vaned
wall l2 and consequently does not occupy lany
extra space, is of great importance since the
gases usually enter the spark arrester in a pul
sating now.
The defleotor member I0 may also be lined
with sound absorbing material. By suitably di
mensioning the bottom opening and also the
angle of the upper cone of said member, the
resonance in the exhaust conduit can be con
er diameter.
As a consequence, the amount of
gas escaping between the vanes of series I2C
would be much in excess of that corresponding
with the surface of said series, whereas only
a relatively very small amount of gas, or no
gas at all would escape through the passages be
tween the vanes IZa, and in some eases there
might even be set up a flow in the reverse direc
tion, i. e. from the central space outwards. In
order to prevent this, I suggest that the width
of the gaps between the baiiie vanes of the var
ious series should decrease from the bottom to
wards the top, in such a manner that all sets
of vanes discharge equal amounts of gas per
unit of time. This can also be accomplished by
suitably perforating the cylinders 20a, 2Gb and
'I‘he outer diameter of member lll determines
What I claim is:
the minimum diameter of casing 5. Thus, a
1. In a spark arrester for the exhaust flues
compact construction of the spark arrester ne
of Diesel engines, a cylindrical casing having
cessitates a small deflector I0. Preferably, the
frusto-conical top and bottom walls provided
maximum diameter of said member should not
with coaxial inlet and outlet openings of equal
exceed the diameter of the inlet and outlet open
diameter, a cyclone outside of the casing and
ings 8 and 9, and at any rate not by more than
having its inlet connected with the side of the
50%. Moreover, vertical acceleration of the gases
casing, an annular series of Whirl producing vanes
entering the eddy space should possibly be pre
by the said frusto-conical bottom wall
vented, inter alia for the reason that the resist
of the casing, a substantially bi-conical deiiector
ance of the apparatusincreases with the square
member supported on said vanes coaxially of the
of the gas velocity. From a simple calculation,
casing inwardly of said inlet opening, and gas
taking into account the rotary movement im
parted to the gases by the spinning vanes H, it 30 outlet means communicating with said outlet
opening of the casing, said means comprising
appears that the inner diameter of the casing
a substantially circular vaned outer wall ex
needs not exceed twice the diameter of the ex
tending from the peripheral portion of the bi
haust conduit. Therefore, as compared with
conical member to said outlet opening, a per
known constructions, the present spark arrester
can be very compact. This is essential, since > forated wall within the vaned wall and permit
ting the passage of gas from the vaned wall to
spark arresters of the type under consideration
said outlet opening, vand a series of radially and
have ordinarily to be accommodated in a rela
vertically disposed baffle walls within the per
tively small space and should have as little
forated wall and extending from the top of the
weight as possible.
Figs. 3 and 4 show an embodiment, wherein 40 bi-conical member to the mouth of the outlet
the diameter of member l0 is considerably small
2. In a spark arrester for the exhaust flues
er than those of the inlet and outlet openings
of Diesel engines, a cylindrical casing having
and wherein, consequently, the spinning vanes
truste-conical top and bottom walls provided with
Il are substantially larger than in the first em
co-axial inlet and outlet openings of equal di
bodiment. This accounts for a stronger gyra
ameter, a cyclone outside of the casing and hav
tional movement in the eddy space, assuming
ing its inlet connected with the side of the cas
the resistance to remain the same, but neces
ing, an annular series of Whirl producing vanes
sitates a somewhat different arrangement of the
carried by the said frusto-conical bottom wall
bañle vanes I2. In the example shown, there
of the casing, a substantially bí-conical deñector
are three concentric series of baiîle vanes, desig
member supported on said vane coaxially of the
nated by |2a, |2b and I2C, and having diameters
increasing from the bottom towards the top.
Inside these sets of vanes there are arranged
perforated cylinders 20a, 20D and 20c, respec
casing inwardly of said inlet opening, said de
?lector member being of less diameter than the
inlet and outlet openings, and gas outlet means
’ communicating with said outlet opening of the
casing, said means comprising a vaned outer
wall including a series of vertically stepped con
This construction is not really more compli
cated than that shown in Figs. 1 and 2, for in
centric sections, the diameter of the lowermost
the latter special provision is to be made, for
section corresponding to the diameter of the bi
instance by means of Welded strengthening rings,
conical deñector, and the diameters of the super
in order to prevent vibration of the uninter
posed sections progressively increasing so that
rupted and consequently long vanes.
the uppermost section is of the same diameter
Owing tothe fact that in apparatus as illus
as the outlet opening of the casing, a perforated
trated in Figs. 3 and 4 the static pressure in
inner wall for each section, and a plurality of
the eddy space rapidly decreases from the out
side towards the axis, the greater part of the 65 radially and vertically disposed bafñe vanes within
each of the said perforated inner walls.
gases is liable to escape through the passages
between the vanes of the series having the great
Без категории
Размер файла
386 Кб
Пожаловаться на содержимое документа