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Патент USA US2108977

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Feb. 22, 1938.
M VULLIERME
2,108,977
MEANS FOR COOLING AND FILTERING LIQUIDS
2 Sheets-Sheet 1
Filed March 21, 1936
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ORNEYS
Feb. 22, 1938.
M. VULLIERME
I 2,108,977
MEANS FOR COOLING AND FILTERING LIQUIDS
2 Sheets-Sheet 2
Filed March 21, 1956
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Patented Feb. 22, 1938
_ 2,108,977
UNITED STATES PATENT OFFICE
2,108,977
MEANS_ FOR COOLING
AND‘
FILTERING
LIQUIDS
Marcel Vullierme, Paris, France
Application March 21, 1936, Serial No. 70,115
In Germany March 25, 1935
7 ‘ Claims.
(Cl. 123—196)
This invention relates to a means of ?ltration
of liquids used in cooling and lubrication systems
of engines.
The different ?uids employed in engines either
5 for cooling, or for lubrication, acquire in the
course of operation various impurities which it
is necessary to ?lter out before putting them
again in circulation in the said engines.
Conventional ?lters of the centrifugal type
operate on the principle that bodies suspended
in ?uids may be separated from the ?uid by
centrifugal force if the speci?c gravities of the
bodies and the ?uid differ. Usually such cen
trifugal ?lters are of relatively small size, and
15 must be operated at very high speeds to pro
duce the required centrifugal force for separat
ing the bodies from the ?uid. As a result such
high speed centrifuges are subject to certain
operating disadvantages such as for example,
20 great vibration, and difficulty in preventing de—
struction of the bearings of the centrifuge.
One object of the invention is to provide an
efficient liquid ?lter, which, while operating cen
trifugally, need not be operated at a higher, rate
25 of speed than the engine.
Another object is to provide such a ?lter by
utilizing the already present moving parts of the
engine and so constructing and designing‘ them
that they will obtain the additional function of
One important application of the invention to.
aeronautics is the use of the blade of the pro
peller of the aircraft as a centrifugal ?lter.
There is thus combined in a single element two
35 distinct functions, namely, the transformation
-of the energy of the motor for propelling the air
craft, and the ?ltration of the liquids necessary
for the ‘cooling or lubrication of the motor.
Moreover, during ?ltration the liquids are like
40 wise being cooled.
To these ends it is proposed to provide a motor
propeller with a. liquid circulation system lo
cated in‘ the propeller blades and. communicat
ing with inlet and outlet conduits for the liquid
Then, in the
blades at a suitable distance from the hub of the
propeller, there may be provided reservoirs
where the centrifugally separated impurities are
collected. These reservoirs may be closed by
50 means of plugs which are removable so that
the interior of the blades and the reservoirs may
be cleaned by centrifugal action of the» propeller
while in rotation.
With the foregoing in mind, the invention
comprises the combination of the elements and.
details of construction described hereinafter in
the following speci?cation and appended claims,
certain embodiments thereof being illustrated in
the accompanying drawings in which:
60
Figure 2 is a partial View in section of that
portion of a propeller which is near the periph
61V;
Figure 3 is an enlarged detail view in section
of an element permitting‘ the passage of the
liquid in the propeller blades;
Figure 4 is an enlarged detail view in ‘section.
of the propeller showing a valve for the auto 10
matic regulation of the circulation of the liquid
in the propeller;
~
Figure 5 is a detail view in section of the pro
peller showing a removable plug therein.
Referring more particularly to the drawings, 15
the propeller may be of any known type. The
hub I of the propeller is mounted by means of
bolts 2’ upon the plate 2 of a suitable driving
shaft. The hub comprises two or more integral
extensions 3, according to whether the propeller
is provided with two or more blades. These ex
tensions 3 are drilled interiorly. Each of the
blades 4 is metallic and preferably of a light
alloy and is: provided at its foot with a conical
retaining band 5 shrunk on and rigidly secured 25
to the blade so as to rotate with the propeller
about its axis. The foot 6 of the blade is held
tightly against the band 5 and the clamping
ring ‘I, there being provided grooves for bearing
races 8 and 9 and the bearing Ii).
30 a centrifugal ?lter.
45 located in the propeller ‘hub.
portion of a propeller which is situated near the
hub;
Figure 1 is a partial View in section of that
,
.
30
The liquid to be ?ltered is introduced through
the hollow hub at II. The extremity of the
hub is stopped by the plug I2, which also serves
as a support for a tube I3 for'returning the
?ltered liquid to the motor.
Communicating 35
passages I4 are provided between the hollow
portion II of the hub and the chamber I5. At
the bottom of chamber I5 is placed a plug I8
which is secured to the blade 4. A tube I 6 is
mounted in the hub and the plugs I2 and I8 so 40
as to extend through the chamber I5 and serves
for the return of’ the liquid through the tube I3.
This tube I6 which turns with the propeller in
rotation around the driving shaft but not in the
rotation of the blade around its own axis, is held 45
in place in the plug I8 by means of a series of
retaining joints H to assure a tight ?t-
_
The plug I8 is shown in detail in Figure 3.
The tube I6 ?ts in the tip I9. On the opposite
side there is screwed on at 20 the central tube 50
20' for the circulation of the liquid. Two other
tubes 2| and 22 are also supported by the plug
Hi. There is thus provided a communicating
passage between the interior of the tubes 20’, 2I
and 22 with the chamber 23 and the tube I6 55
and thence to the tube I3. For the entry of
liquid into the blade, holes 24 and 25 are pierced
in the plug I8 to permit the passage of the liquid
from the‘ chamber I5 into the chamber 26 in
the interior of the blade. The liquid reaching 60
2
2,108,977
this point passes into the passage 28 and through
holes 21' and 29’ into the passages 21 and 729,
hollowed out in the blades before the torsion
of the latter,~at the desired rate.
As shown in Figure 2, these passages 21, 28
and 29 enclose tubes 2|, 20’ and 22 respectively
said reservoirs being provided with closure mem
bers removably ?tted in said blades.’
3. In combination with an engine having a
liquid circulation system, a propeller driven by
said engine and conduits carried by said propeller
,for allowing circulation and centrifuging of said
siderable portion of the'length of} the blade.
liquid and regulating valves resiliently actuated
by pressure of said liquid for controlling and di
These tubes open respectively into reservoirs 30,
3| and 32 where the impurities to be separated
verting the liquid in said conduits.
4, In combination withran engine having a
out accumulate. In practice there are several
grams of various impurities, in?nitely small, reg
liquid circulating system, a propeller driven by
ularly divided without changing the dynamic
equilibration of the propeller, each blade receiv
peller for allowing circulation of said liquid with
in said engine and within the blades of said pro
peller and for centrifuging said liquid by utiliz-' 15
ing the centrifugal force set up by the'rotation
of said propeller when in operation and regulat
for the return of the ?uid and extend over a con- ‘
10
said engine and means located within said pro
ing in the course of operation an equal quantity
of impurities.
At the extremity of the central reservoir 31
there is provided an aperture 33 for cleaning
and emptying purposes. In Figure 5, which
shows the detail of the aperture 33 in the blade
in larger scale, it is seen that the lateral cavities
‘ 353 and 32 are connected to the outlet opening
by the small ‘conduits 34 and 35. The sleeve 36
shrunk into the aperture 33 has conduits 34'
and 35'» which communicate with 'conduits 134
and 35. A conicalrplug 31 is maintained in place
' by a screw 38.
Figure 4 shows a regulation valve. If the
liquid to be ?ltered is for exampleroil, it is neces
sary to allow for its viscosity when in a cold
state. On the interior of the tube 2|, placed in
the piping 21, there is a‘ cylindrical cleft spring
40. When the pressure ‘of the liquid'in the an
nular‘piping exceeds a certain limit, the spring
bends and allows the liquid to pass ‘through the
holes 4 I, thus short-circuiting the liquid. A small
pin 42 holds the spring in place in the tube 40.
It is understood that the invention is not lim
ited to the characteristics shown but that the
means'andrthe construction described have to do
with the form preferred among the various pos
sible embodiments of the invention. >
I claim:
45
liquid circulating system, a propeller driven, by
‘said engine and means located within said pro
peller forrallowing circulation of said liquid with
in said engine and within the blades of said pro
peller and'for centrifuging said liquid by utilizing
‘ the centrifugal force'set up by the rotation of said'
propeller when in operation, said means including
separate supply and return passages leading
'fromsaid engine to the hub of said propeller
and thence lengthwise of the‘blades and approx
55
imately to the-tips thereof and reservoirs located
adjacent said tips in communication with said
passages ‘for collecting ‘the sediment centrifugal
separated ‘from
said'liquids.
,
,
'
liquid for controlling and diverting the liquid in
said
passages.
'
‘
1:20
5. In combination with an engine having a
liquid circulating system, a propeller driven by
said engine andmeans located within said pro
peller for allowing circulation of said liquid with
in said engine and within the blades of said pro 25
peller and for centrifuging said liquid by utiliz
ing the centrifugal force set up by the rotation
of said propeller when in operation, said means
including separate’ supply and’ return passages
leading from said ‘engine to the hub of said pro- 3'
peller and thence lengthwise of the’ blades and
approximately to the tips thereof and regulating
valves in said passages resiliently actuated by
pressure of said liquid for controlling and divert- _
ing the liquid in said passages.
6. In combination with an engine having a
liquid circulating system, a propeller driven by
said engine and means located within said pro
peller for allowing circulation of said liquid with
in said engine and within the blades of said. pro
40
peller .and ‘for centrifuging said liquid by utiliz
ing the centrifugal fo'rceset up by the rotation
of said propeller when in operation, said means
7
1. In combination with an engine having ‘a
ly
ing valves resiliently actuated by pressure of said
r
'
2. In combination with an engine having a
including separate supply and return passages
leading from said engine to the hub of said pro->
peller and thence lengthwise of the blades and .
approximately to the tips thereof, reservoirs lo->
cated adjacent said tips in communication with .
said passages for collecting the sediment cen
trifugally separated from said liquids and regu 50'
lating valves resiliently actuated by pressure of
saidliquid for controlling and diverting the liq- "
uid in said passages.
'
~
7. In combination with an engine having a
liquid circulating system, a propeller driven ‘by?’55
said engine and means located within said pro
peller for allowing circulation of saidliquid With
in said engine and Within the blades of said pro
peller and for centrifuging said liquid by utiliz
liquid circulating system, a propeller driven by ' ing the centrifugal force set up by the rotation
of said propeller Whenin operation, said means
said engine and means located within said pro
including separate supply and return passages
peller for allowing circulation of said liquid with
leading from said. engine to the hub of said pro
in said engine and within the blades of said pro
peller and thence lengthwise of the blades and
peller and 'for centrifuging said liquid by utiliz
65
ing the centrifugal ‘force set up by the rotation approximately to the tips thereof and reservoirs
located
adjacent
said
tips
incommunication
with
of said propeller when in operation, said means
including separate supply and return passages said passages for collecting the sediment cen
trifugally separated from said liquids, said res
‘leading from said enginerto the hub of said ervoirs being provided with ‘closure ‘members re
.70 propeller and thence lengthwise of the blades movably ?tted in said blades, regulating‘valves
and approximately to the tips thereof and reser
resiliently actuated bypressure of said liquid for‘
voirs located adjacent said tips in communica
controlling and diverting theliquid in said pas‘
tion with said passages for collecting the sedi
sages.
ment .centrifugally separated from said liquids,
'
MARCEL V ULLIERME.
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