close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2130142

код для вставки
pt.. i3, E93.
2,130,142
W. w. LQWTHER
AIR CLEANER
Filed April 13, 1955
/0
Patented Sept. 13, 1938
2,130,142
UNITED STATES
PATENT OFFICE
2,130,142
AIR CLEANER
Wilfred W. Lowther, Minneapolis, Minn., assig'nor
to
a corporation
Donaldson Company,
of Minnesota
Inc., St. Paul,-
-Application April 13, 1935, Serial No. 16,189 l
14 Claims. (Cl. 18S-15)
My present invention relates to air cleaners skirt I5 is secured at I6 to the outer portion of
the hood I Il and depends within the outer skirt
and has for its object to improve the same in var
ious important particulars, whereby eñ’iciency of or flange 9 from which it is inwardly spaced, so
the same is increased and rendered dependable
5 and reliable, regardless of varying ?low of
through the air cleaner. The air cleaner is
pecially adapted for `use in connection with
ternal combustion engines. The improved
air
es
in
air
cleaner is of a compact formation, has no parts
10 to get out of order or require frequent cleaning,
and has been found highly eñicient When used
in connection with the internal combustion en
gines of automobiles designed to run at very high
as well as low speeds. A commercial _form of the
l5 improved air cleaner is illustrated in the accom
panying drawing, wherein like characters indi
cate like parts throughout the several views.
.Referring to the drawing:
„
<
Fig. 1 is a view partly in elevation, but chiefly
29 in vertical axial section showing the improved
air cleaner;
'
-
Fig. 2 is a fragmentary plan view of the air
cleaner, some parts being broken away;
Fig. 3 is a fragmentary section taken on the
25 line 3--3 of Fig. 2;. and
Fig. 4 is a horizontal section taken on the line
4--5 of Fig. 1, some parts being broken away.
Carburetors used in connection with internal
combustion engines, such, forf‘example, as the
Ford automobile engine, have air intake tubes. to
which the air cleaners are adaptedfto be at
tached. For attachment to such vcarburetor air
intake tubes, the present air cleaner isf> provided
with an axial clean air discharge tub`e 5 which,
g5 as shown, is provided at a point considerably
above its lower end with a secured inner flange 6
that holds a- pliable gasket 'i adapted to rest
upon the intake tube of the carburetor when the
latter is telescoped into the lower end of the tube
40 5. An annular plate 8 is secured to the lower
portion of the tube 5, at a point above its lowerl
end, and inclines radially outward and down-I
ward and at its outer portion is provided with`
an upstanding iiange or inverted skirt 9. This
4B bottom plate and its ilange afford an oil well.
The topl of the air'cleaner is closed by a hood
forming plate I0 that is rigidly but detachably
secured, by a nut-equipped stud I I, to a cross bar
I2 which, in turn, isk rigidly secured within and
50 extends diametrically of the upper portion of the
tube 5.
Preferably, and as shown, the under surface
of this hood forming plate III is provided vwith a
silencing lining I3 held in_place by a woven wire
B5 -frame Ill. An approximately cylindrical inner
as to leave an annular air-intake passage Il that
leads to the outer portion of the oil well I8.
5
An annular baille plate I9 having large air
„passages 20,- is secured to the upper portion of
the vair tube 5 and its outer portion is secured to
the upper edge of the inner skirt `I5 and to the
outer portion of the hood I 0, as shown, by 10
crimped portion IGI The egxtreme outerfportion ,
of the hood I0 is shown as extended at 2I to
form an -eave that projects over the upper edge
of the outer skirt and the upper edge of the lat
ter is shown as inwardly curved at 22; but nei- l5
ther the feature of the interlocking crimp I6,
the projecting eave 2l or the inturned edge 22
constitute a feature of my present invention. In
the drawing, a sleeve 23 is secured around the air
delivery tube 5, but this -also is not a feature of 20
my invention.
The annular space between the air discharge
tube and the inner skirt I5 is filled in by an oil
and dust-intercepting device, which is shown as
formed by- Wire screens y, and is preferably of the 25
character disclosed and claimed in Fthe William
H. Schulz Patent No. 2,011,303 issued August 13,
1935, under the title of Air cleaner screen.
As an important feature of this invention, the
oil‘well I8 is provided with. 'an upstanding cup- 30
forming flange 24 that is located inwardly from
the lower edge°of the inner skirt I5 and below
the screens. This ñange I4 is perforated prefer
ably by circumferentially spaced oil passages 25,
for an important purpose which will appear in 35
the description of the operation.
'
Operation
Under vthe suction produced by the engine to
which the cleaner is applied, partial vacuum or ¿o
suction will be produced in the axial air delivery
tube 5 and this will cause a flow of air to the
air cleaner, first downward through the annular
air intake passage I1, thence to the outer portion
of the oil well, and from thence over the upper 45
edge of the cup-forming flange 2l up through the
oil and dust-intercepting screens and thence to
lthe engine through the air delivery tube 5.
'I'he air thus delivered against the surface of
oil in the outer portion of the oil well will lift a 50
large part of the oil in the well out of the cup
formed by the ñange 24 into the screen chamber
in the form of a fine spray. Part of this oil
sprayed into the screen chamber will be deposited
on and held in suspension by the`screens, and 55
2,180,142'
y2
oil released from the air in the screen chamber
in excess to the amount held in suspension by
the screens will flow back through the screens
chiefly into the cup formed by the bottom plate
and flange 24 and will not only illl the cup, but
will build up a head of oil above the upper edge
of the cup fl’ange 24. The head of oil thus built
up above the flange 24.will, particularly at rela
tively low air velocities, outwardly overflow the
10 upper edge of the cup ’flange 24 and be picked
up by the air passing the upper edge of the cup
ated some place between three-quarters full load
and full load, and that for a period there will
be substantially no movement of either air or
oil through the passages 25, but that under fur
ther increased load and consequently increased
air velocity the pressure outward of the cup flange
becomes so great that air passes inwardly through
the passages 25 and bubbles up through the an
nular head of oil. This action has been found
to be highlyl important for the reason that a 10
point is reached near maximum engine speed or
load where the air flowing past the upper edge
flange, thereby tending to keep the incoming air
` of the cup flange is at such great velocity and
stream supplied with oil.
It is here important to note that, during the
operation of the cleaner, the amount of oil lifted
out of the portion of the oil well radially outward
of the cup flange 24 by the incoming air and the
amount of oil remaining in the cup will depend
largely on the velocity of the air, but the oil re
20 maining in the cup will usually be at a level below -
is so steady, and the air pressure above and out
ward of the cup ñange is so relatively great that
the oil remains banked up in a head above and
inward of the cup flange and practically ceases
to overflow the edge of the cup. Now, it will be
obvious that in the absence of the passages 25,
this failure of the oil to enter the air stream
the cup flange passages 25. Hence, it will be seen by overflowing the upper edge of the cup flange
that air at any given velocity having once lifted - under `conditions encountered near maximum
a certain amount of oil out of that portion of the load would result in rapid starvation of the
screens u, and great loss in air cleaning eiliciency
oil well outward of the cup flange 24 will there
after pass over the upper surface of such oil as if operation near maximum engine load or speed
remains in the cup and will pass the passages 25 were continued for an extended period. How
ever, when the passages 25 are provided, the out
and the upper edge of the cup flange 24 carry
ing with it little, if any, oil from the bottom ward movement of air through the passages does,
portion of the oil cup outward of the flange.
80 Particularly in the lower speed ranges oil is sup
plied to the air stream passing the upper edge
of the cup by oil overflowing the upper edge of
the cup and by oil which will spout through the
metering passages 25 in the cup ñange. Under
these conditions, of course, a large part of the.
dust in the air and all of the heavier particles
of dust will be thrown directly into such oil as
remains in the portion of the cup outward of
the flange, but such dust as is carried by the
upper edge of the flange will be sprayed with oil
and drained back _into the oil well cup flange.
AThe oil spray or mist will be carried through the
screen chamber to a varying extent depending
in bubbling through the annular head of oil, raise
some of the oil into the path of rapidly expand
ing air above and inward of the cup flange, and
this oil is delivered to the screens y in sufficient
quantities to retain the efficiency of the cleaner
during prolonged periods of operation near max
imum load. There is little danger in getting an 35
oversupply of oil from this source due to the
relatively small volume and low velocity of air
passed through the passages 25, and the rela
tively low velocity of the main air stream at
points where it intercepts the oil raised by the 40
air’from the passages 25.
In order to obtain the desirable functions and
efllcient operation described above, the follow
upon the air velocity through the cleaner, but will - lng enumerated features are'important, to wit:
all
.be removed from the air before the air reaches (l) that the annular air intake passage I1 have 45
45
the discharge tube 5. Under the above described substantially complete annular communication
action, there is a continuous flow of oil outwardly with that part of the oil well inward of the inner
into the air stream passing the upper edge of skirt I5; (2) that the inner skirt and cup-forming
the cup from where it is carried in the form of ñang'e each terminate in approximately the same
plane and approximately at the static oil level 50
'a spray into the screen chamber and when liber
ated from the air and screens, is returned back in the well.
From the foregoing, it will be understood that
by gravity to the oil well radially inward of the
cup-forming flange. 'The above described out- . the preferred form for commercial device illus
ward flow of `oi1 through the perforations 25 in trated in the drawing is capable of various modi
ñcations within the scope of- the invention herein
55 the cup flange is brought about largely as a result.
'
of the weight of the head of oil in and above the disclosed and claimed.
cup flange.
/
When the engine is idle, the oil will settle back
into the oil‘well and cup to a normal altitude
Certain of the features of the air cleaner above
described and particularly the relative arrange
ment of the upper structural features of the air
portions of the screens or the upper edge of the
cleaner are not by me herein claimed per se, the
same being the invention of Frank A. Donaldson, f
flange 24. The inclined bottom of the cup-form
ing flange 24 insures delivery of oil outward
him as inventor of even date herewith, which
which will usually be approximately the lower
disclosed and claimed in an application filed by
has matured into Patent No. 2,053,603, dated
oil is being suspended in the screens. Obviously, Sept. 8, 1936. _
What I claim is:
by the action of the oil, which is spread over
1. An air cleaner comprising an axial air dis
the `screen surfaces, all the dust will be-inter
cepted and taken up by the oil and caused to charge tube, an oil-well-forming bottom plate
flow with the oil back to the bottom' of the well. extended outward from lower part of axial air
70 Under certain conditions it has been found that discharge tube and provided at its outer edge 70
with an inverted outer skirt, an inner skirt spaced
oil will cease to flow outwardly through the pas
sages 25 in the cup flange when the air velocity from said outer skirt and bottom plate to form an
through the cleaner becomes relatively great,l annular air intake passage, anv air pervious oil
and dust intercepting means in the space between
such, -for example, as might exist when the en
the axial tube and-inner skirt, and a hood ex 75
75 gine to which the cleaner is connected is oper
' through the ports 25 even when a large body'of
3
' 2,180,142
tended over the upper end of said axial Vdischarge
tube and intercepting means andkconnected to
the upper edge of said inner skirt, and an up
standing cup-forming flange on'said bottom plate
of less diameter than the oil well formed by said
bottom plate and over the upper edge of which
the dust-laden air is passed on its way to said in
with said cup-forming ñange. ~»
6. An air cleaner comprising an' axial air dis
charge tube, an oil-well-forming bottom plate ex
tended outward from the lower portion of said
air discharge tube and provided at its outer edge
with an inverted outer skirt, an inner skirt spaced
tercepting means, said bottom plate being de
from the said outer skirt and bottom plate to form
clined radially outward from said axial tube to its
an annular air intake passage, and a hood extend
point of connection with said cup-forming flange.
2. An air cleaner comprising an axial air @dis
charge tube, an oil-well-forming bottom plate ex
tended outward from lower part of axial air de
livery tube and provided at its outer edge with an
15 inverted outer skirt, an inner skirt spaced from
said outer skirt and bottom plate to form an an
nular air intake passage, an air pervious oil and
dust intercepting means in the space between the
axial tube and inner skirt, and a hood extended
20 over the upper end of said axial tube and inter
cepting means. and connected to the upper edge
of said inner skirt, and an upstanding cup-form
ing flange on said bottom plate of less diameter
than the oil well formed by said bottom plate and
25 over the upper edge of which the dust-laden air
is passed on its way to said intercepting means,
ed over and in spaced relation to the upper end
of said axial discharge tube and connected to
lthe upper edge of said inner skirt to close the top
thereof, and an upstanding cup-forming flange
on said bottom plate of less diameter than the oil
well formed by said bottom plate and over the up
per edge of which dust-laden air is passed on its
way from the oil well to the axial outlet tube, said
bottom plate being declined radially outward from
said axial tube to its point of connection with said .
cup-forming flange, said cup-forming flange hav~
ing circumferentially spaced perforations below '
its upper edge.
_
>
'7. An air cleaner comprising an axial air dis
charge tube, an oil-well-forming bottom plate
surrounding and extending outwardly ‘from the 25
lower part of the air discharge tube and provided
said bottom plate being declined radially outward
from said axial tube -to its point of connection
with said cup-forming flange, said cup-forming
at its outer edge with an inverted outer skirt,
an inner skirt spaced from said outer skirt and
bottom plate to form an annular air intake pas
flange having circumferentially spaced perfora
sage for directing air downwardly into the oil 30
well,said annular intake passagebeing in substan
tially complete annular communication with that
portion of the oil well directly inward of the in
tions below its upper edge.
3. In an air cleaner, a casing provided with an
oil well in its lower portion and having an axially
located clean air outlet duct leading downwardly
.35 from the upper portion of the casing and having
outwardly spaced therefrom an annular intake
duct arranged to discharge into the outer portion
of the well, and a cup-forming ñange located in
the oil well- radially intermediate the axial dis
40 charge duct and the inner _wall of said~ annular
air intake duct'to provide with said inner wall a
reversely directed continuation of said intake
duct, there being a radial passage-way between
said duct portions for a substantial circumfer
45 ential extent at substantially the normal static
fluid level in said well, the arrangement of parts
being such that, under normal operation of the
cleaner, the air discharged into the oil well from
the annular intake will impinge upon oil in the
50 well and pass over the surface of such oil as re
mains in that ,portion o_f the oil well radially
intermediate the cup-forming ñange and annular
intake and will then pass/ over the upper edge of
said cup-forming flange.
55
from said axial tube to its point of connection
.
4. The structure defined in claim 3 in which the
said cup-forming flange is provided with circum
ferentially spaced perforations intermediate its
upper and lower edges.
ì
"
5. An air cleaner comprising an axial air dis
60
charge tube, an oil-well-forming bottom plate ex
tended outward from the lower portion of said air
discharge tube and provided at its outer edge with
an inverted outer skirt, an inner skirt spaced
65 from the said outer skirt and bottom plate to form
an annular air intake passage, and a hood ex
tended overand in spaced relation to the upper
end of said axial discharge tube and connected to
i the upper edge of said inner skirt to close the top
thereof, and an upstanding cup-forming ñange
on said bottom plate of lessdiameter than the oil
well'iormed by said bottom plate and over the up
per edge of which dust-laden air is passed on its
way from the oil well to the axial outlet tube,
said bottom plate being declined radially outward
ner skirt, a head closing the upper end of the said
inner skirt and being spaced from the open upper. 35
end of the discharge tube, and a cup-forming
flange extended upwardly from the bottom plate,
said cup-forming fiange surrounding the dis
charge tube and being spaced radially therefrom
and the inner skirt,'said depending inner skirt
and cup-forming flange terminating in approxi
mately the same plane.
8. In an air cleaner, a casing provided with an
oil well in its lower portion and having an axially
located clean air outlet duct leading downwardly 45
from the upper portion of the easingand having
outwardly spaced therefrom an annular intake
duct arranged to discharge into the outer portion
of the well, the bottom of said oil well beingim
perforate, and an upstanding annular cup-form 50
ing iiange seated on the imperforate bottom of
the oil well in radially spaced concentric arrange
ment with respect to the said clean air outlet
duct and annular intake duct, said cup-forming
flange terminating with its upper edge substan 55
tially opposite the uppermost point of communi
cation between the annular air intake and that
portion of the oil well intermediate the annular
air intake and said cup-forming fiange. _
9. An air cleaner comprising an axial air dis
charge tube, an oil-well-forming bottom plate
surrounding and- extending outwardly from the
lower part o-f the air discharge tube and provided
60
at its outer edge with an inverted outer skirt, an
inner skirt spaced from said outer skirt and bot 65
tom plate to form an annular air intake passage`
for directing air downwardly into the oil well,
said annular intake passage being in substan
tially complete annular communication with that
portion of the oil well directly inward of the 70
inner skirt, a head closing the upper end of the
inner skirt and being spaced from the upper end
of the discharge tube, and a cup-forming iiange
extended upwardly from the bottom plate, said
cup-forming fiange surrounding the discharge 75
2,130,149
tube and being spaced radially therefrom and
then pass over the upper edge of said'cup-forming
the inner skirt, said inner skirt and cup-form
flange.
ing ñange each terminating in close proximity
to the static oil level in the oil well.
10. An air cleaner comprising an axial air dis
$1
charge tube, an oil-well-forming bottom plate
surrounding and extending outwardly from the
lower part of the air discharge tube and pro
vided at its outer edge- with an inverted outer
v
12. The structure defined in claim 11, in which
the said cup-forming flange is provided with cir
cumferentially spaced perforations intermediate
its upper and lower edges.
-
13. In an air cleaner, an outer annular casing
wall having a closed bottom providing an oil well,
an annular inner wall concentrically disposed
skirt, an inner skirt spaced from said outer skirt „ within the cuter wall and being closed at its
and bottom plate to form an annular air intake
passage for directing air downwardly into the
`oil well, said annular intake passage being in
substantially complete annular communication
with that portion of the oil well directly inward
-of the inner skirt, a head closing the upper end
' of' the said inner skirt and being spaced from the
open upper end of the discharge tube, and a
~- cup-forming flange extended upwardly from the
20
bottom plate, said cup-forming flange‘surround
ing the discharge tube and being spaced radially
therefrom and the inner skirt, said depending
inner` skirt andy cup-forming flange terminating
in approximately the same` plane, and in which
the said cup-forming flange is circumferentially
25
perforated intermediate _ its upper and lower
edges.
11. In an air cleaner, >a casing provided with an
oil well in its lower portion and having a clean
30 air outlet leading from the upper portion there
of and having adjacent the. interior of the outer
as
wall thereof an annular intake duct arranged
to discharge downwardly into the outer portion
of the well, and a cup-forming flange located in
the oil well radially inwardly of the annular air
intake duct, to provide therewith a reversely di
rected continuation thereof, there being a radial
air passageway between said duct portions for
a substantial circumferential extent and at sub
-40 stantially the normal static fluid level in said
well, the arrangement of parts being such that.
under normal operation of the cleaner, the air
` discharged into the oil well from the annular in
take will impinge upon oil in the well and pass
45
over the surface of such oil as remains in that
portion of the oil well `radially intermediate the
cup-forming flange and annular intake and will
top and open at its bottom, said inner wall being
radially inwardly spaced from the outer wall to
afford an annular air inlet duct leading approxi
mately verticallyi downwardly 'into the outer
peripheral portion 'of the oil well and providing
wlthinthe conñnes of said inner wall an interior
chamber of materially greater cross-sectional
area than said annular air inlet passage, an out
let from the upper portion of the chamber, ldust
and oil intercepting means horizontally spanning
the interior of the chamber above the well, and
io
an upstanding annular wall concentrically ar
ranged within the oil well and being of less di
ameter than said inner wall, said upstanding wall
upwardly terminating below the intercepting
means and defining the inner side of a reversely
directed annular continuation of said air inlet
passage which leads from the oil well upwardly
into the interior chamber and is of materially
less cross-sectional area than said chamber,
there being a radial passage of material circum
ferentially extent between the reversely directed
portion oi said annular intake substantially at
the normal static fluid level; whereby air di
rected downwardly into the oill well will depressA
the oil level and reverse its direction over the
oil in the well radially outward of the upstand~
ing annular wall -in the oil well and against the
outer surface of said upstanding wall, and will
then expand over the upper edge of said upstand- _
ing wall into the interior chamber.
14. 'I'he structure defined in claim 13, in which v
the said annular wall is provided with circumfer
entially spaced perforations intermediate its up
per and lower edges.
45
Документ
Категория
Без категории
Просмотров
0
Размер файла
711 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа