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Патент USA US2109804

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March. 1,1938.
A. c. sAxE
2,109,804
SELF PRIMING PUMP
Filed March 19, 1931
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ARTHUR C.S'AXE'
Patented Mar. - 1, 1938
2,109,804
UNITED STATES PATENT‘ OFFICE
2,109,804
SELF-PBIMING rum
- Arthur 0. Sate, Columbus, Ohio
Application Mai-ch19, 1931, Serial No. 523,776
a Claims. (01. 103-113)
v This invention relates to self-priming centrif
ugal pumps, theobject being chie?y to provide an
improved construction whereby a by-pass having
a valve between the discharge and suction cham
5 hers is closed by the impact of the suction line
water when the air or gases have been exhausted
from said line. Other objects will appear from
the disclosure.
I. v
.
.
In the accompanying drawing-
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'
'
Figure 1 is vertical section on the line 1-! Fl
2 with parts in full and broken out.
'
.Fig. 2 is a view in elevation looking at the right
hand side of Fig. 1 with the suction line removed.
Fig. 3 is a view like Fig.1 of a modi?cation. the
‘section being taken on the line III-III Fig. 4.
Fig. 4 is an elevational view looking atv the
20. right-hand side of Fig. 3.
-
peller chamber is of less area than the port lead- -
ing from the suction chamber into the impeller
chamber.
The invention is embodied in the example here
10 in shown and described, the features of novelty
being ?nally claimed.
blade to rock the valve to closed position, where
it is held until released by reason of the presence
of air or gas again__coming from the suction line.
It will be noted that the priming port II which
leads from the priming ?uid container to the im-‘ 5
'
The operation is this:
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0
To prime the pump water is supplied through 1
the discharge or priming hatch 1' of the dis
charge‘ chamber until such water reaches the
level ?xed by the opening of the suction line and .
the rotation of the impeller is started. The rota- 15
tion of the impeller ?rst exhausts a mixture of
air or gas and water from the suction chamber,
after which both water and air or gas come to
gether from the.suction line, and ?nally water
alone. When water alone is drawn from the suc
tion line its impact or pressure on the blade I5 50
urges that member downward and the valve to
Referring ?rst to the views, Figs. 1 and 2. the
character >5 designates the ordinary impeller
closed position. after which ‘ water alone is
which is housed in a usual or suitable manner but
pumped through the suction line until exhausted
has, in the present instance, a chamber 6 con
25 stituting a suction or intake chamber. Mounted
above the impeller housing and intake chamber
are a priming water and discharge chamber 1 and
a chambered portion 8 forming an extension of
the intake chamber b'ut leading downward into
30 the suction chamber 6. The suction line 9 has a
check valve at 9“, for example, at its lower end
and is connected at its upper end with the cham
bered portion 8.
_
_
The discharge from the impeller chamber ex
35 tends upward from the bottom of the housing into
the discharge chamber 1 through a passage ID
in the rear. 1,
'
The discharge chamber ‘I communicates with
the suction chamber 6 by means of a passage H '
40 formed with a valve seat, a valve I! being pivoted,
as shown, in, said passage, said valve adapted
when suitably rocked to open and close the pas
sage. Said valve l2 carries at its upper side with
in the discharge chamber ‘I an arm I! on which
45 is secured a weight I‘; and said valveat its lower
sidewithin the suction chamber carries an. arm
with a blade IS. The weight I4 is of sumcient
‘mass when placed at a given point on the arm II
to hold the, valve l2 normally in open position
50 and with the blade Ii opposing the inlet to the
suction chamber.
When, in operation, air or
gas, or water carrying a considerable quantity of
air or gas, enters the suction chamber the blade
and valve are not actuated; but when the water
55 is substantially freed from gas it presses the
from the sourceat the foot of the suction line.
It will be noted from Figures 1 and 2 that the 25
arm I! and weight ll are so arranged that weight
II has its greatest oment'arm about the pivot
of valve l 2 when the latter islopen. This moment
arm decreasesas the valve moves towards closed
position and as the member l5 moves out of the 39
direct path of liquid in the suction line. The
result is that there is a tendency for the valve
to be kept open until the velocity head‘ of ?uid
in the suction line reaches a selected degree but
when the valve is once started towards closed 35
position, closing of the valve is facilitated by de
crease in the length of the moment arm.
,
It will also be noted from Figures 1 and 3 that
when the valve is closed, it is slightly hydro
statically unbalanced so that the unbalanced 4°
hydrostatic pressure will aid in keeping the valve
closed. From these ?gures lt'will be noted that
the ‘upper surface of the valve I2 is‘ so arranged
that that portion of the area which is disposed
to the right of the‘ pivot pin thereof is of greater 45
area than .that portion which is disposed to the
left of the pivot pin.v This difference in area
brings about the hydrostatic unbalance of the
valve so that the pressure in the chamber ‘I- act
ing on the upper surfacefof the valve ‘tends to 50
keep the valve closed. ‘However, as soon as the
velocity head in the suction line acting on the,
blade I! 1 falls below the selected degree, the
weight" will be'su?lcient to overcome the hydro
static unbalance and open the valve.
55
2
In this operation it will be noted that the prim
ing water merely churns around in the impeller,
housing and discharge chamber until all the air
\ or gas is exhausted from the suction line and suc
and thereafter closing said valve and maintain;
ing it closed while this condition continues to ex
ist, said last-named means comprising a ballle
member of less area than the cross-section of
5 ,‘tion chamber, but that when the water, minus
the suction line projecting into the path of ?ow
the air or gas begins to ?ow, that is when the
The modification shown permits a
of the ?uid therein but movable substantially
out of said path of ?ow by the action thereon of
said selected velocity head of ?uid, and a weight
associated therewith and preselected to prevent
initiation of the closing movement of said valve
until said member is subjected to said selected
velocity head of ?uid, said weight being so re
lated to said valve that movement of the valve
towards closed position decreases the e?ective
15 large quantity of priming water to be initially
ness of the weight as said ba?le moves away from
pump is primed, the pumped water is discharged
through the hatch ‘Iat of the discharge chamber.
In Figs. 3 and 4, the parts aresubstantially the
10 same and are correspondingly designated except
that the suction chamber, as shown at 6*, has
greater upward extension and to a point sub-
stantially in line with the top of the discharge
chamber.
the center of ?ow, said valve being slightly hy
supplied to the pump, the level of which as in
drostatically unbalanced when in closed 'posi- '
_ the former case can ‘be at the bottom of the
tion so that the unbalanced hydrostatic pressure
connection of the suction line with the extension
intake chamber. With‘ such construction no
20 foot or check valve is required in the suction line
to prevent loss of water by syphoning, which
will aid in keeping the valve closed, said weight
being su?icient to overcome the slight hydro 20
static unbalance to open the valve when the
velocity head of ?uid acting on said ba?le- mem
ber falls below the selected degree.
loss may occur when the operation of the pump
is stopped;
'
The forms of the parts can be changed with
25 out departing from the gist of the invention as
claimed.
a
What I claim is:
v
,
_
3. A self-priming centrifugal pump compris- a
ing an impeller chamber, a suction‘ line leading‘ 25
into said impeller chamber, an‘ impeller in said
chamber, a container for priming, ?uid associated
1. A self-priming centrifugal pump compris , with said chamber, a port leading from said con-v
ing an impeller chamber, a suction line leading tainer to said impeller chamber, said port being
'30 into said impeller chamber, an impeller in said of less area than the port leading from the suc
chamber, a container for priming ?uid associated tion chamber into the impeller chamber, a dis
charge passage leading from said impeller cham
with said chamber, a port leading from said con
ber, a valve for controlling said port to admit
tainer to said impeller chamber, a discharge pas
sage leading from said impeller chamber, a valve priming. ?uid to said impeller chamber when open
35 for controlling said port‘to admit priming ?uid and to substantially exclude priming ?uid there
to said impeller chamber when open and to sub
from when closed, means for holding said valve
stantially exclude priming ?uid therefrom when open to admit priming ?uid to said impeller
, closed, and means for holding said valve open. chamber until the air is substantially exhausted
to admit priming ?uid to said impeller chamber .from_ the suction line and ,until a ?uid ?ow with
40 untihthe air is substantially exhausted from the a selected velocity head is established therein
suction line and until a ?uid ?ow with a selected and thereafter closing said valve and maintain
ing it closed while this condition continues to‘
svelocity head is established therein and there
after closing said valve and maintaining it exist, said last-named means comprising a ,bame
closed while this condition continues to exist, member of less area than the cross-section of
the suction line projecting into, the path of ?ow
45 said last named means comprising a bame mem
ber of less area than the cross-section of the of the ?uid therein but movable substantially
suction line projecting into the path of ?ow of the out of said path of ?ow by the action thereon of
?uid therein but movable substantially entirely said selected velocityhead of ?uid, and a weight
out of said path of ?ow by the action thereon of associated therewith and preselected to prevent
50 said selected velocity head of: ?uid, and a weight initiation of the closing movement of said valve
associated therewith and pre-selected to prevent until said member is ‘subjected to said velocity
initiation of ' the closing movement of said valve head of ?uid, said valve being “slightly hydro
until‘said member is subjected to said selected statically unbalanced when in closed position so
that the unbalanced'hydrostatic pressure will aid
~velocity head of ?uid, said weight being so re
55 lated to said valve that movement of the valve in keeping the valve closed, said weight‘being
su?icient to overcome the slight hydrostatic .un
towards closed position decreases the effective
ness of the weight as said baiile member moves balance to open the valve when the velocity head
of ?uid acting on said ba?le member falls-below
away from the center of flow.
‘
2. A self-priming centrifugal pump compris
60 ing an impeller chamber, a suction line leading
into-said impeller chamber, an impellerin said
chamber, a container for priming ?uid associated
with said chamber; a port leading from said con-i
tainer to said impeller chamber, said port being
10 I
the
selected
degree.
‘
'
a
30
'
40
45
50
55
.
4; A self-priming centrifugal ‘pump compris 60
ing an impeller chamber, a suction-line leading
into said ‘impeller chamber, an impeller in said_
I chamber, a container for priming ?uid associated
with said chamber, a port leading from said con-
_ v
_
65 of less area than the port leading from the suc- ' tainer to said impeller chamber, said port being 65
of less area than the port leading from the suc
tion chamber into the impeller chamber, a dis
charge passage ieading from said impeller cham
tion chamber in'to the impeller chamber, a dis~
ber, a valve for controlling said portv to admit ‘charge passage leading from'said impeller cham-'
priming ?uid to said impeller chamber when open ber, .a valve for controlling said DQrt‘toadmi't '
priming ?uid to said impeller chamber when open
70 and to substantially exclude priming ?uid there
from when closed, means fori‘holding' said valve and to substantially exclude priming ?uid there
open to admit priming ?uid to said impeller from when closed, means for holding said' valve. "
chamber until the air iss'ubstantially exhausted open to admit priming ?uid to said impeller
from the suction line and until a ?uid ?ow with chamber .until the air is substantially exhausted,
76 a- selected velocity head is established therein from the suction line and until a ?uid ~?ow with
'
8,100,804
'as'electedvelocityhead-istherein
- _
3
container into said suction “line,
port being
and thereafter closing said valve. and maintain- ‘ of less area than the port leading from the suc
ing it closed while this condition continues to tion line into the impeller chamber, a discharge '
exist, said last-named means comprising a bame
e leading from said impeller chamber, a
member projecting into ‘the path of fluid ?ow
valve for controlling said port to admit priming
ing through the pump/,‘and a weight associated ' liquid to said impeller chamber when open and
therewith and preselected to prevent initiation‘ to substantially exchide priming liquid therefrom
of the closing movement of said valve until prim
when closed; means for holding said valve open
10
ing is completed, said valve being slightly hydro to admit priming liquid to said impeller chamber '
statically unbalanced when in closed position 'until the air is substantially exhausted from the 10
so that the unbalanced hydrostatic pressure will
aid in keeping the valve closed, said weight be
ing su?lcient to overcome the slight hydrostatic
unbalance to open the valve when the velocity
15 head of ?uid in the suction line falls below the
selected degree.
suction line and until a ?uid ?ow with a selected
velocity head is established therein and there- ~ ‘
after closing said valve and maintaining it closed
while this condition continues to exist, ‘said last- '
named means comprising a baiiie member con 15
nected to said valve and located in the suction
line, said baiile member being of less area than
an impeller chamber, a suction line leading into' -. the cross sectional area of the suction line and
said impeller chamber, an impeller in said cham
projecting into the path of, ?ow oi the liquid
ber, a container for priming ?uid associated with therein but being movable substantially out of 20
said chamber, a port leading from said container said path of ?ow by the action thereon of said
to said impeller chamber, said port being of less selected velocity head of liquid, and an arm con
area than the port leading from thesuction nected to the valve and projecting from the op
chamber into the impeller chamber, a discharge posite side of the priming port into said priming
passage leading from said impeller chamber, a liquid container, 'said' arm carrying a weight 25
valve for controlling said port to admit priming which is disposed in‘ said priming liquid contain- .
?uid to said impeller chamber when open and er andfwhich is preselected to prevent-initiation
to‘ substantially exclude priming ?uid therefrom oi the closing movement of said ‘valve until said
when closed, means for holding said valve open bai'le member is subjected to said selected ve~ ,
tov admit priming ?uid to said impeller chamber 'locity head of ?uid, said weight being so related 30
until the air is substantially exhausted from the , to said valve that movement of the valve towards ‘
suction line and until a ?uid ?ow with a selected closed position decreases the e?ectiveness of the
velocity head is established therein and there
weight as said baiile member moves away from
5. itself-priming centrifugal pump comprising
I
20
-
25
'
after closing said valve and maintaining it
closed while this condition continues. to exist, said
valve being slightly hydrostatically unbalanced
when in closed‘position so that the unbalanced
the center of ?ow, said valve being hydrostat
ically unbalanced when in closed position so that 35
the unbalanced hydrostatic pressure will aid in
keeping the valve closed, the decrease in eiiec
tiveness of said weight and the unbalanced hy
drostatic force serving to compensate for the
hydrostatic pressure will aid in keeping the valve
closed, saidlmeans including a member for over
40 coming the slight hydrostatic unbalance to open decrease in e?'ectiveness of the velocity head
the valve'when the velocity head of ?uid in- the _ force produced by movement of the baiile mem
suction line falls below the selected degree.
‘ber away from the center of ?owhsaid weight
6. A self-priming centrii’ugal pump comprising
' being sumcient to overcome the hydrostatic un
an impeller chamber, a suction line leading into - balance to open the valve when the velocity head
' said impeller chamber, an impeller in said cham
ber; a container for priming liquid associated
with said chamber and disposed directly adjacent
-to said suction line, a port leadingli'rom said
oi‘ liquid acting on saidbaiile member falls below
the selected degree.
'
AR'I'HUR C. saxn.
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