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Патент USA US3093095

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June 11, 1963
3,093,085
H. M. POLLAK
SELF-PRIMING PUMP
Filed July 28, 1960
INVENTOR
HEN/P)’ M. P0 LAK
3,093,085
Patented June 11, 1963
3
2
3,093,085
Henry M. Pollalt, Easton, Pa., assignor to Ingersoll-Rand
Valve 34 consists of a hollow tubular body portion 36,
very similar to a pipe T ?tting. Two ends of body 36
are ?tted with plugs 38 and 40, while a side aperture 42
and pipe 32 are threadedly connected. Plug 38 has a
SELF-PRIMHNG PUMP
Company, New York, N.Y., a corporation of New
threaded aperture 44 to receive a suitable lead-off pipe 46.
The inner end of aperture 44 forms a port seat 48 adapted
to 'be closed by the end of a reciprocal element 50 which
may be cylindrical, as shown. Element 50 is also adapted
This invention relates to self~priming centrifugal
to cooperate with another seat port 52 in plug 40 at the
pumps.
10 inner end of an aperture 54 threaded to receive a pipe 56
The invention is an improvement and modi?cation of
leading to discharge passage 16. Reciprocal element 50
a pump of the type described in co~pending application,
is guided within a sleeve 58 which ?ts element 50 very
Serial No. 31,378, ?led May 24, 1960‘, by Alexander
loosely. Normally element 50 is held on its seat 52 by
Brkich and assigned to the same assignee as the present
a spring 6!) ?tting about a reduced end portion 62 of ele
Jerse
y Filed July 28, 1960, Ser. No. 46,606
6 Claims. (Cl. 103--113)
application, now U.S. Patent No. 3,082,694, dated March 15 ’ ment 5t).
26, 1963, and differs therefrom in at least one respect in
that the discharge of the priming pump does not pass
into the discharge line of the main pumping element. In
Discharge passage or nozzle 16 is connected to a dis
charge line 64, and nozzle 16 is preferably provided with
a check valve 66 of any suitable and well known con
accordance with this invention, gas is evacuated from a
struction for sealing the discharge system of the unit so
liquid head to a centrifugal pump and discharged to at 20 a vacuum is created in the system during the priming
mosphere by a priming pump to completely discharge
such air from a system, whereupon the priming element
substantially ceases to provide an output.
It is accordingly an object of this invention to provide
cycle to prime the centrifugal impeller ‘12.
In operation, starting the apparatus by rotation of
rotor 12 and the priming pump rotor 22 starts evacuation
of air from inlet passage 24, via conduit 26 and discharge
such an arrangement having means to effectively evacuate 25 passage .32, into the interior of valve body 34, and thence
the liquid head to a main pump of accumulated air to
out through pipe 46 to atmosphere or to any convenient
permit effective pumping of liquid by the main pump.
Another object of this invention is to provide the afore
mentioned arrangement wherein part of the main pump
discharge is transmitted through the priming element to
the main pump inlet in a direction opposite to normal
flow, when the priming element is pumping, to provide
along such flow path a cooling and regenerative ?ow.
place of disposal. Pump rotor 12 is very ineffective at
pumping gaseous ?uid or air and, therefore, until sub
stantially all the air is evacuated [from the system or un
til at least enough air to submerge rotor 12 has been re
moved, a vacuum of appreciable value will exist in dis
charge 16 and in pipe 56. However, as soon as rotor 12
begins to operate on liquid instead of air, pressure will
This invention contemplates a self-priming pump com
develop in discharge passage 16 and pipe 56' and exerts
prising a centrifugal rotor disposed in a housing having a 35 a pressure against pressure face 68 on the end of ele~
rotor inlet and discharge. A priming pump is disposed
ment 5t} and in opposition to the force of spring 60 to
in the housing and has an inlet connected to the rotor in
urge element 50 to close seat port 48. This closure con
'let, and a discharge normally communicating with atmos
cludes the priming or effective pumping action of the
phere through a valve. The valve is connected to the
Water ring pump, as rotor 22 is not adapted to develop
40
rotor discharge and is responsive to pressure thereat for’
pressures of any considerable range.
closing such communication to atmosphere and for con
However, rotor 22 will normally continue to churn
necting the two discharges for effecting reverse ?ow
liquid. Without circulation of liquid the rotor would be
through the priming pump to the rotor inlet.
come heated and consequently troublesome. This heat
The invention will be more completely understood, as
ing is prevented by the introduction of liquid in a reverse
will other objects and the advantages of the invention, by 45 direction through discharge pipe 32 by Way of the pas~
reference to the following description of a preferred em
sage afforded between element 50 and sleeve 58. Such
bodiment shown in the drawing, in which the single FIG
liquid
can ?nd its way through the priming pump past
URE shows in longitudinal section parts of a centrifugal
and in opposition to the rotor 22, and by way of passage
pump and its priming element and the valve by which
50 26 to the inlet passage 24.
the evacuated air is discharged to atmosphere.
It will be understood that the elements, rotors 12 and
Referring to the drawing, it will be noted that the cen
22, may be driven by an suitable means, in this instance,
trifugal pump and priming elements thereof are substan
a motor ‘70 suitably supported on casing 10 by a frame
tially identical with those of the above mentioned copend
72.
ing application wherein a centrifugal main pump rotor 12
Thus, by the above construction are accomplished,
is disposed in a casing or housing 10 having a rotor inlet 55
among others, the objects hereinbefore referred to.
portion or nozzle 14 leading to the eye of rotor 12 and a
I claim:
rotor discharge passage 16. Housing 10 has a hollow
1. A self-priming centrifugal pump comprising a hous
cylindrical extension 18 disposed longitudinally there
I
ing for a rotor and a priming pump and having rotor inlet
from to house a water ring type pump having a casing
26 and rotor 22 for priming the main pump rotor. For 60 and discharge passages, a centrifugal rotor disposed in
said housing, a priming pump disposed in said housing
priming the system, air is evacuated from an inlet pas
having an inlet connected to the rotor inlet and a dis
sage 24 within inlet nozzle 14 by a suitable inlet pas
charge passage, and a valve connected to the priming
sage 26, diagrammatically indicated, connected to an in
pump discharge passage normally open to pass ?uid from
let cavity 28 within extension 18 of casing 10. Rotation
of the priming pump 22 causes discharge of air into a 65 the priming pump to atmosphere, said valve having a
pressure face connected to the rotor discharge passage to
discharge passage 30 having a discharge pipe 32 lead
ing to a valve 34.
effect closing of said valve to atmosphere upon develop
As has been said above, the pump, as regards centrifu
gal and priming parts, is identical with those parts as
ment of pressure in the rotor discharge passage and to
abridged.
ing ‘for a rotor and a priming pump and having rotor in
connect the rotor discharge passage to the priming pump
shown and described in the aforementioned co-pending 70 discharge passage.
patent application, and for convenience the foregoing is
2. A self-priming centrifugal pump comprising a hous
3,093,085
let and discharge passages, a centrifugal rotor disposed
in said housing, a priming pump disposed in said hous
ing having an inlet connected to the rotor inlet and a
discharge passage, and a valve connected to the priming
pump discharge passage normally open to pass ?uid from
the priming pump to atmosphere, said valve having a
pressure face connected to the rotor discharge passage
to effect closing of said valve to atmosphere upon de
velopment of pressure in said rotor discharge passage,
said valve providing a passage connecting the rotor and
priming pump discharge passages to each other when said
valve is closed to atmosphere and being controlled by
said pressure face.
3. A self~priming centrifugal pump comprising a hous
ing for a rotor and a priming pump and having rotor in
let and discharge passages, a centrifugal rotor disposed
in said housing, a priming pump disposed in said housing
4
and discharge passages, a centrifugal rotor disposed in
said housing, a priming pump disposed in said housing
having an inlet connected to the rotor inlet ‘and a dis
charge passage, a valve having a hollow body portion
connected to the priming pump discharge passage, said
valve having a seat port connected to the rotor discharge
passage and another seat port communicating with at
mosphere, a reciprocating element in said valve cooper
ating with said seat ponts to connect said priming pump
discharge passage lalternatively to said seat ports, and a
sleeve ?xed in said valve and disposed about said recipro
cating element to form a restricted passage from said
rotor discharge passage seat port to the interior of said
hollow valve body portion.
6. A self-priming centrifugal pump comprising a hous
ing for a priming pump and a pump rotor ‘and having
rotor inlet and discharge passages, a rotor disposed in
said housing, a priming pump disposed in said housing
having an inlet connected to the rotor inlet and a dis
charge passage, a valve having a hollow body portion
connected to the rotor discharge passage by a seat port 20 charge passage, I8, valve having a hollow body portion
connected to the priming pump discharge passage and
and having another seat port communicating with at
having a pair of seat ports one being connected to the
mosphere, said valve being connected to the priming
rotor discharge and 1the other communicating with at
pump discharge passage, and a reciprocating element in
mosphere, a reciprocating element in said hollow body
said valve cooperating with said seat ports to connect
said priming pump discharge passage alternatively to 25 portion cooperating with said seat ports to connect said
priming pump discharge passage alternatively to atmos
said ports.
phere and the rotor discharge passage, a sleeve ?xed in
4. A self-priming centrifugal pump comprising a hous
said valve and disposed about said reciprocating element
in g for a rotor and a priming pump and having rotor inlet
to form 'a restricted passage from said rotor discharge
and discharge passages, \a centrifugal rotor disposed in
said housing, a priming pump disposed in said housing 30 passage seat port to the interior of said hollow body
portion, and a spring normally holding said reciprocating
having lan inlet connected to the rotor inlet and a dis
element on said rotor discharge passage seat port.
charge passage, a valve having ‘a hollow body portion con
having an inlet connected to the rotor inlet and a dis
nected to the rotor discharge passage by a seat port and
having a second seat port communicating with atmosphere,
said valve being connected to the priming pump discharge
passage, and a reciprocating element in said valve cooper
ating with said seat ports to connect said priming pump
discharge passage alternatively to said ports, said element
having a pressure face associated with said rotor discharge 40
passage closing the ?rst seat port during priming and
being responsive to the rotor output to eifect such re
ciprocations.
5. A self-priming centrifugal pump comprising a hous
ing for a rotor and a priming pump and having rotor inlet 45
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,149,454
McBath ______________ __ Mar. 7, 1939
FOREIGN PATENTS
304,905
319,176
361,480
430,421
Great Britain ________ __ Jan. 31,
Germany _____________ __ Mar. 1,
Germany ____________ __ Oct. 14,
Italy ________________ __ Feb. 13,
1929
1920
1922
1948
462,232
462,233
Germany _____________ __ July 6, 1928
Germany _____________ .. July 6, 1928
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