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Патент USA US2400391

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MW M» 1946«
2,400,391
R. R. CURTIS
V‘ANE TYPE BOOSTER PUMP
Filed Aug. "7, 1944
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~ Russell E. Curz‘zäs
"Patented Mey '14,1946
' ,_ 2,400,391
p UNITED- s'rA-r Es
y»PA‘I‘ENT >ori-fici;
'_ $2,400,391 . ` '
VANE TYPE noos'mn PUMP '_
aussen a. omis, Dayton, ohio, „signor to
' Curtis Pump- Company, Dayton, Ohio. a cor
poration of Ohio _
f Application August 7, 1944„'Serial No. 548,336 _
7 Claims.
(ci. ros-11s)
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_
I
vide a vane-type -pump 'with _an annular vapor
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through.
Specifically, the invention deals with a pump
and motor unit adapted to be submerged in a
pond of volatile liquid 'material such as gasoline
for separating gases and vapors from the gaso
»
Other vand further objects of the invention will _
become apparent to those skilled in the art fromf
the following detailed description ofthe annexed
sheet of drawings, whieh,fby way of preferred
line to positively propel only fully liquid‘gasoline
»example only, illustrates one embodiment of the
and thereby eliminate vapor lock in the fuel sys
tem of an aircraft or other propelled device.
-
separating chamber‘and a screened inlet prevent
ing passage of bubbles of gas and vapor there
separating means so that only fully liquid' mate
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_
'
v A still further object of the invention is to pro
This inventlonrelates to a positive-displace
ment type pump equipped with'liquid and vapor
rial is pumped.
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invention.
vThe invention will hereinafter be specifically
~»
_
_
On the 'drawingz'
_.
'
' .
Figure l is afragmentary and broken vertical
described -as embodied in an aircraft fuel system,
cross-sectional -view,¿ with parts in elevation, of
-but it should be understood that the Pumps of>
this invention have vvide- usage in separating va Il a vane type boosterpump according to this in
vention mountedin a tank.
ìiors from liquids and in pumping fully liquid ma
eria '.
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Í
taken along the line II--II- of Figure 1.
As shown on the drawing:
According to the invention an lairplane fuel
tank, preferably vented to the atmosphere, is _pro
«
In Figure 1, the reference numeral I0 .desig-L
vided with an apertured bottom wall. . A pump
nates generally a fuel tank of an airplane con
and motor unit has a base mounting piateclosing
-
` the bottom _wall aperture of_ the tank-and sup
taining a pond P. of liquid gasoline.' The 'tank
i0 has a bottom wall I_I apertured as at lia.
. A pump and motor unit I2 is mounted in the` '
porting the pump and vinotor'unit "in `the tank.»_v
The pump is equipped with an agitator adjacent
the bottom of the tank. _An open-ended passage-_
tank Ill on a base plate I_l which closes the aper
ture I Ia ofthe tank bottom wall _I I. .A'mounting
` way is provided foriliquid fuel and the agitator
acts on the fuel flowing through this passageway
ring I4 is seated in' the tank Il_i on thebottom
wall II around the aperture IIa thereof and cap
screws I5 are passed through the base plate I3
and bottom wail I I into threaded relation in the
mounting ring 'I4 for securing the pump and
to separate vapors and gases in the fuel from'
the liquid fuel. Bubbles of gases and vapors are
formed which rise freely thITOllEh the pond out
of the passageway. A vane-type -pump has an
-motor unit I2 in the tank ’and vfor sealing the
, aperture' I_Iaof the tank° A sealing gasket (not
niiet communicating with the passageway.' .This
inlet is covered with a screen which prevents pas
shown) can be interposed between the base plate
sage of bubbles therethrough. , The positive-_dis
` I3 and the. tank wall I I".
placement pump thus‘ only receives agitated -liq
.
. vThe base'plate I3 has an aperture Ila therein
closed by a cover or cap‘ IB which is secured to
' the plate I3 by means of cap screws I1. A drain
vplus I8 is provided in the cap It.
'
. uid from which the vapors have been separated,
^ .and propels this liquid to a fuel line. Anv electric'
motor drives -the rotary vane pump' and- is carried
« above the pump from the same base plate.=
. It is, then, an object of the invention to provide 40
a vane type vapor-separating pump.
.
Figure 2 is a horizontal cross-sectional view,
_
The base I3 has an upstanding tubularv leg
>I. closed at _thebottom by means of a. cap 20 -
and receiving a conduit fitting 2i at the top
,Another _object of the inventionis to provide- _ A thereof.
_A single bolt- 22 is passed through the.
a booster pump'fuelsystem which agitates the
fuel to separate lvapors andgases therefrom and ’ _ cap 2l andthreaded into a hub 2Ia of the con
. which positively'propels the fully liquid fuel.
Another "object of the- invention is to pro-f'
_ vide .a positive-displacement type vapor-separating pump.
_
A further object `of the invention is to provide
a pump and motor unit adapted to be submerged
in a pondyof liquid and having .an open-ended
annular passageway through which theliquid can
freely flow together-with an agitator for beatlnil
out bubbles of gas and vapor from the liquidin
-said passageway.
_ .
.
ß duit fitting and secures the fitting and cap in po-_
sition. 'I‘he fitting 2| _and’cap 20 can be inter
~-
changed.
.
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>
The opstanding tubular leg I 9 has a horizontal
_tubular portion 23 projecting therefrom rein
_50 forced- by- a rib 24. _An upstanding‘ilange 25
projectsv upwardly from the end.l of- the tubular
" portion'ß and is alsoreinforced'by the rib 2.4.
- Thisportion Il carries a horizontal ring 28 at
the uppeiI lid thereof -on which is mounted a
casing head. t' for an electric motor 28.' The elec- _
2,400,391
2
carries the agitator> 41 at the lower end thereof
and the >propeller blades 41h act on liquid in the
passageway 46 to beat out the gases and vapors
therefrom for liberating the bubbles B. The
pump shaft 35 also drives the pump rotor 42 and
the vanes 43 act on the bore 33a of the liner 33
‘to positively propel- liquid from the inlet 36h of
the casing through the passageway 23a of the
vtubular member 23. This passageway 23a com
vtric motor is covered by a 'casingv 29 supported
on the head 21. The »head 21'~has a hollow verti
cal boss-portion 21a carrying a bearing 28a for
the motor~ shaftl 30. ` A stationary seal 3l is
mounted in the boss portion' 21a and coacts with
-a rotatingseal ring 32 driven by the shaft 30.
A gear 33 is secured on the lower end of shaft
30 in meshed relationship with a gear 34 of. a
l pump shaft 35.
The tubular portion 23 carries a vertical tubu
10 municates with a vertical passageway I3a in the
- lar housing 36 through which the pump shaft'35
dpstanding tubular leg I9. Liquid is thus pres
projects. `The housing 36 has an inturned flange
' sured into the passageway 13a and ñows there
36a at the top end thereof. A graphitic carbon
from through the conduit nipple 2| into the fuel
bearing ring 31 is seated in _the housing 36 against
line of the airplane.
.
The bubbles B in the passageway 46 cannot
this flange 36a. A pump liner 33 supports the 15
pass through the screen 44 since they are larger
bearing ring 31 and, in turn. is supported by a
than the screen mesh. However, these bubbles
second bearing ring 33.Y This bearing ring 39 is
are free to rise through'the passageway so that
_ bottomed by a ring plate 40 which is secured by
the passageway does not become gas-bound.
means of cap screws such as 4| to the bottom end
wall of the casing 36.
'
'
‘
20 . From the above descriptions it will be under
stood that the‘pump of this invention vigorously
agitates and churns fuel in a localized open
and receives the`drive shaft 35 therethrough in
ended passageway provided around the pump in
_pressed relation. The rotor 42 has hub portions
a pond of the fuel in-which the pump is mounted.
32a rotatably mounted in the` bearing rings 31
and 39.' Vanes 43 are Áslidably mounted in slots 25 The thus agitated and churned liquid has bubbles
of gases and vapors separated therefrom. These
@2b of the rotor 42 and have outer end portions
' bubbles are too large to> pass through a screen
~riding on the inner wall 33a of the liner which
which covers the inlet of Athe vane-type pump.v
provides the eccentric pump bore.
The vane type- pump thus only receives bubble- «
The liner 38 has a plurality ofl inlet slots 33h
< aligned-with an inlet opening seb m the side wan 30 freed liquid and propels this liquid under posi
tive pressure to the fuel line leading from the
-of the casing 36 remote from the( tubular >por
tank.
».tion 23.
The pump ofl this invention will thus prevent
The liner 38'has a plurality of similar slots 38e
vapor lock in airplane fuel systems since even
>’aligned with a passageway 23a providedby the
A pump rotor 42 is mounted in the casing 36
vtubular leg 23.
3.5 though the- fuel is at or very close to its? boiling
'
A cylindrical screen 44 is disposed around the
point in rare?led khigh altitude atmospheres, any
‘casing 36 and covers the inlet “opening _ 36h
' of the fuel which'passes through the annular gap
‘ or passageway between theÍ collar 46 and the
thereof. The screen et is supported on the plate
«it
y
'
Iscreen, 44 will be agitated'by the blades 41h to
’
A cylindrical collar or metal >shield 45 is dis 40 beat out the bubbles B of vapor and gas from the
posed around the screen 44 in spaced parallel - liquid. The blades 41b of the propeller are pref
erably adjusted at angles which will actually
relation therefrom and has a cut-out portion
impel the fuel upwardly through the _passageway
receiving the tubular leg 23 therethrough. The
46 to aid in sweeping bubbles out of the passage
collar 65 is supported against the upstanding leg
way. The vane pump therefore receives degasi
i3 of the unit and is held in fixed relationship
iied fuel from an upwardly flowing stream.
.around the screen vto provide an'annular open
It will, of course, be understood that various
ended vertical passageway-46 communicating at '
details of construction may be varied through
its top and >bottom with the pump P.
As shownv in Figure 1, the, lower end of the , a wide range without departing from the prin
' collar G5 hagan outturned 1ip`45a"providing a! 50 , çiples` of this invention and it is, therefore. not
the purpose to limit the patent granted hereon
' somewhat enlarged mouth at the bottom of the
otherwise than necessitated by the scope of the _
passageway
The shaft-36
46.-projectsbeyond the bottom of the
casing 36 and a dishecl metal disk-` 41 is bolted on`
this extended end’of the shaft. The disk 41 has
anupstanding annular skirt 41a surrounding the
lower end of ~ the casing 36
and Y projecting
,appended claims.
_
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I claim as my invention:
1. In combination, a rotary vane pump having`
. an inlet -and an outlet, a screen covering the
inlet of said pump, and an agitator adjacent said
'inlet acting on material about to enter the inlet
upwardly into the passageway 46.
Propeller blades 41h project radially outward , v for beating out bubbles-of gas and vapor there
from the upper end-of the skirt-41a. The pro 60 from, said screen having a mesh'i'lne enough to
’ prevent passage of the liberated bubbles there
` peller blades arepitchedto cause agitation of
liquid inthe passageway P for excessively beat
ing the liquid infjthe passageway to liberate
bubbles Bìofvapors and gas therefrom. These .
l through.
2. A vapor separating _and pumping device
which comprises a unit adapted to be submerged
in a pond of liquid to be pumped, a pump asso
through the pond P to burst at the surface of the . ` ciated with vsaid unit having an inlet communi
eating with said pond, a screen covering said
pond for discharging their gases and vapors from ’
_ inlet, and an- agitator associated with said unit
_bjuli'lìíles- rise through. the passageway 46 and»
>the
liquid.>
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.
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.
,
In operation,- the unit ,l2 ls submerged inl the
acting on liquid in the pond about to enter the
pond P‘oi‘ the tank and, of course, the passageway
d6 thereof is filled with liquid since it yis in free
communication with the pond at both the top -and
inlet of the pump for beating out bubbles of
gas and vapor therefrom, said screen having a
meshisufiiciently fine to retard passage of the
bottom ends thereof. _
'
`
The motor 23 drives the motor shaft 30 for~
driving the pump shaft 35. This pump shaft
liberated bubbles therethrough.
_ ì 3. A vapor- separator» and pump assembly com
prising ~apiimp having a` screened inlet, means
arranged to propel liquids upwardly through the_'_
defining an open-ended passageway along said
_screened inlet.l and a propeller in said passage
-passage and beat out bubbles therefrom tol de- _
vway arranged for ilowing liquid` through the ‘
passageway and agitating the liquid to beat out
bubbles of gas and vapor therefrom larger than
the meshes of the screen whereby liquid entering
gasify the,` liquids before they aregpumped.
«v mersion
6. In combination,~a
in a pond of liquid,
pump aarranged
shield surround
for sub- '
in_g said pump in spaced relation and d'eñning
_ the pump is degasiiled.
4. A pump and motor unit .comprising `verti
cally spaced pump and motor casings, a positive
a' fluid flow path around the pump, said pump
having an _inlet opening communicating with
» saidfluid ilow path, and a propeller in said fluid
' displacement pump in said pump casing, a mo-_ l0-
tor in said motor casing having a shaft driving
said pump, a mounting base for securingk the
.unit in submerged position in atank. a shield
'surrounding the motor casingdeilning an open-~
ended vertical passageway between the casing
' A_and shield, said pump casing having an openingl
» '141A pump -and motor assembly comprising a
unit having a vane type pump, an electric motor
between the endse of the passageway providing
drivingly connected with the pump,- a propeller >
a pump inlet, and an agitating propeller driven
by the motor shaft having vanes in the lower end`-
for mounting the pump in ai tank, a collar sur
' of the passageway arranged. for beating out
bubbles of Agas and vapor from liquid and for
flowing bubble-rich liquid upwardly through 1,
the passageway.
'
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'5. In combination, a tank, a pump in the tank, '
a shield in the tank surrounding the pump in
spaced relation defining au- open-»ended vertical
passage in the tank, said pump having an inlet
communicating with the passage; and an agitat- '
ing propeller in the lower end oi' the passage
- '
ilow path arranged for flowing liquid through
the path and agitating „the liquid-to' beat out
bubbles of gas and vapor ,therefrom'for feeding
fully liquid material from said pond said inlet '
of the pump.`
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t
drivingly connected with the motor, and means
rounding said _pump receiving said propelleryl
therein and defining the outerwa-ll of an ope'n
endedy .annular passage around the pump, and
said pump having an inlet communicating with _' -V
said passage for receiving fully liquid material '
therefrom, said propeller being effective to~ ñow
lliquid through the flow path and to agitatexthe
liquid for releasing bubbles of gas. a'ndvvapo‘r
therefrom.
Bussum. R. cpa'rrs.
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