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Патент USA US2404635

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July 23, 1946.
v. A. HOOVER
2,404,635
SEALING MEANS FOR DRIVING MOTORS OF SUBMERSIBLE PUMPS
_ Filed Nov. 6, 1945
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2,404,635
SEALING MEANS FOR DRIVING MOTORS OF SUBMERSIBLE PUMPS
Filed Nov. 6, 1943
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2,404,635
Patented July 23, 1946
UNITED STATES PATENT OFFICE
2,404,635
SEALING MEANS FOR DRIVING MGTORS OF
SUBMERSIBLE PUMPS
Vaino A. Hoover, Los Angeles, Calif., assignor tov
Electrical Engineering and Manufacturing Cor
poration, Los Angeles, Calif., a corporation oi‘
California
Application November 6, 1943, Serial No. 509,298
11 Claims.
1
This invention has to do, in general, with
pumps of the type which are adapted to be sub-
merged in the liquid to be pumped. In submerged
pumping the entire exposed part of the pump
is subjected to the submergence pressure and
other parts are also subjected to the discharge
pressure which, of course, is higher than the sub
mergence pressure. Heretofore, in pumps of this
(01. 103——87)
2
for the electric motor 8. The passage I6 dis
charges through an opening 24 in the upper or
outer end thereof and into a discharge pipe 26.
The volutes I2, [4 are circumferentially spaced
adjacent the impeller, but at the discharge ends
thereof they open into an annular chamber 3!]
having inner and outer walls 32, 34 which, when
assembled with the Walls I8, 20 are aligned there
with to form a continuous passage. At the out
type the sealing means for isolating the driving
motor housing from the submergence pressure 10 let end thereof the outer wall 34 of chamber 30
is provided with an outwardly-turned annular
have been subject to the discharge pressure. and
?ange 36 having two steps or recesses 38, 40 in
it has been a principal object of this invention
the inner periphery thereof which respectively
to provide a submersible pump in which the mo
receive the end of outer wall 20 of the passage
discharge pressure and in which any leakage of 15 16 and an annular sealing ring 42. A ring 43
having an L-shaped section surrounds the outer
pump discharge is vented and cannot enter the
wall 20 adjacent the ?ange 36, having one arm
motor housing. It has ‘also been an object of
44 parallel to such ?ange and one arm 45 received
this invention to provide a submersible pump in
in the annular recess 40 in abutment with the
cluding a driving motor and in which the various
seals which isolate the motor housing may be 20 side face of the sealing ring 42 therein. Bolts 48
connect ?anges 35 and 44 and draw the latter
simultaneously adjusted and tightened from a
tightly into engagement with the sealing ring, ex
common and readily-accessible point. A still
panding the same against the outer surface of
further object of the invention has been to pro
wall 20.
vide a new and improved sealing means through
The inner diameter of the inner wall 32 of the
which the cable which supplies electric power 25
" chamber 39 is equal to the outer diameter of the
to the driving motor is led into the motor hous
inner wall [8 of chamber l6 whereby the wall 32
mg.
may be slipped over the impeller end of wall [8
Other objects and features of novelty of the
when the parts are assembled. A flange 50 ex
invention will be made apparent by the follow
ing description and the annexed drawings which, 30 tends radially inwardly from the inner wall 32
' and interiorly thereof receives and positions an
it will be understood, are only illustrative of the
annular member 52 of right angular cross-sec
invention and impose no limitations thereon not
tion, one annular arm of which abuts the inner
imposed by the appended claims.
surface of cylindrical wall 32 and extends toward
Referring to the drawings, in which similar
the outer end of inner wall 18 of chamber (6, a
reference numerals refer to like parts,
space being left between the two in which an
Fig. 1 is a longitudinal sectional view of a sub
entirely enclosed sealing ring 54 is positioned.
mersible pump including sealing means accord
Jack-screws 55 extend through ?ange 59 into
ing to the invention, and
engagement with the rear face of annular mem
.igs. 2, 3 and 4 are enlarged views of sealing
ber 52 and are operable to move it toward and
means disclosed in Fig. l.
away from sealing ring 54 in order to vary the
The pump device disclosed in the drawing com
pressure on the sealing ring.
prises an intake 2 which communicates with a
An oil chamber 6% is positioned interiorly of
volute chamber 3 in which an impeller 4 is ro
the ?ange 53 and has an outer radial wall 62
tatably mounted on the end of the armature
shaft 6 of an electric motor 8. The volute cham 45 which abuts the inner surface of such ?ange and
is connected thereto by bolts $4, a cylindrical
ber communicates with two diametrically-oppo
wall 66 which tightly ?ts the inner surface of
site volutes I2, i4 having openings therebetween
inner wall 18 of passage I6, and a second radial
through which the liquid in which the pump is
wall 68 which is adjacent the motor end of the
submerged is admitted to the space between the
volutes and into contact with the sealing means 50 oil casing, all of said walls being integrally con
nected, and shaft sealing means being interposed
for the drive shaft. The volutes discharge into
between the radial walls 62, E8 and the shaft 6.
the annular passage l6 Whichis defined between
Access to the interior of the oil chamber is pro
the spaced inner and outer walls 1 8, 26 of a cylin
vided by screw plugs (not shown) in the wall
drical housing which forms a continuation of
the volutes and surrounds and forms a housing 55 thereof, which may be reached by walled open
tor housing sealing means is not subject to pump
2,404,635
3
ings (not shown) through walls I8, 20 of pas
sage I6.
At the motor end of the oil chamber the pe
ripheral wall 60 thereof is formed with a recess
80 within which an annular sealing ring 82 is
positioned. A split ring 84 is also positioned
within the recess 80 and is held from movement
in the direction of the motor by an annular ridge
86 which is formed integrally with the inner wall
It of chamber I6 and extends inwardly there
4
I22, which surrounds the cable I20, is also sub
lect only to the submergence pressure.
The sealing means 82 and III] which isolate the
motor housing from the surrounding ?uid may
be simultaneously tightened or adjusted in the
following manner. When bolts II4 are operated
to increase the pressure on sealing ring IIO, the
casing 93, I00 is pulled to the right as viewed in
the drawings, These parts are connected to the
10 oil chamber in the manner and through the parts
from.
The wall 68 of the oil chamber is connected to
the drive end bell 90 of the motor by bolts 92,
described hereinbefore and the oil chamber will
therefore also be pulled to the right as viewed
. in the drawings, thus tightening the sealing ring
the end bell is connected to the stator 94, the
02 between the oil chamber and ring 84 which is
stator is connected to the commutator end bell 15 held from movement to the right by means of
ridge 86.
0S, and the commutator end bell is connected to
a cylindrical member 98 having an integral outer
It has heretofore been the practise to lead the
end wall I00, which is concentrically arranged
electric wiring, such as cable I20, through parts
within inner wall I8 of passage I6 and supports
of the pump which are subjected to discharge
the outer end of easing I8, 20 in a manner to be 20 pressure, whereby sealing means capable of re
described. The annular space between cylindri
sisting discharge pressure must be provided. By
cal wall 90 and the inner wall I 8 of passage I6
the present invention, however, the cable I20 is
is closed by a wall I02 which is integrally or per
led through the casing 98, I00 directly into the
manently connected to wall I 8 at its outer pe
surrounding ?uid whereby the sealing means I22
riphery and at its inner periphery is formed with
are only required to withstand the submergence
pressure.
a ?ange I04 the inner wall of which abuts the
outer surface of the cylindrical wall 08. An
By reason of the described structure and ar
annular cap I 06 having a peripheral ?ange I00
rangement of parts the motor and pump, includ
?ts over the outer surface of wall 98 and is inter
ing the volutes, may be assembled as a unit out
nally recessed at I ID to form, with the end of
side of the casing formed by walls I6, I8, after
?ange I04, a recess within which an annular seal
which the casing may be slipped over this unit
ing ring H2 is positioned and which may be ex- .
and secured thereto. Further, the casing may be
panded into tight engagement with the outer
easily removed from the unit without dismantling
surface of wall 98 by tightening bolts II4 Which
it and without disconnecting the electric wiring
attach cap I06 to the end Wall I00.
cable I20 from the motor, this being done by re
At the center of the end wall I00 there is
moving the means which connect the motor and
formed an axial opening through which extends
pump unit to the casing and then slipping the
the cable I20 which supplies electric energy from
casing o?“ of the unit and along the Wiring cable.
a source to the electric motor 8. The outer part
While I have described and illustrated one form
of this opening is of greater diameter than the 40 which my invention may take, it will be apparent
cable, thereby providing an annular recess within
to those skilled in the art that other embodi
'- which a sealing ring I22 is positioned and which
ments, as well as modi?cations of that disclosed,
may be expanded into sealing engagement with
may be made without departing in any way from
the cable by means of an annular device I24 of
the spirit or scope of the invention, for the limits
L-shaped section which surrounds the cable and 45 of which reference must be had to the appended
is attached to the end wall I00 by bolts I26.
claims.
.
The functions, purposes and operation of the
I claim:
various devices and parts will now be described.
1. A submersible pump comprising elongated
The impeller discharge ?ows through the volutes
spaced concentric cylindrical inner and outer
I2, I4 into the annular passage I0. There is no 50 walls de?ning a passage therebetween for ?uid
communication between the volutes or passage
I6 and the interior of the motor casing which is.
under pressure and forming an open-ended cham
ber within the inner wall, a motor within said
therefore, never subjected to pump discharge
chamber and having a housing attached thereto
pressure. Any leakage at the joint between the
at one end thereof, sealing means between said
volutes and passage I6, if not sealed by ring 42, 55 housing and said inner wall to prevent the pas
will ?ow to the outside ?uid within which the
sage of ?uid into the motor, an oil chamber at
pump is submerged.
Any leakage past sealing
tached to the motor at the other end thereof,
ring 54 will ?ow around ?ange 50 to the space
sealing means between the oil chamber and said
between the volutes, which is open to the ?uid
inner wall for preventing the passage of ?uid into
within which the pump is submerged. The seal 60 the motor, means for compressing the ?rst-named
ing means surrounding shaft 6 are operable to
sealing means, and means operable by operation
prevent seepage along the shaft, but it will be
of said compressing means for compressing the
noted that even here the pressure would be only
second-named sealing means.
the submergence pressure and not the pump dis
2. A submersible pump comprising spaced con
charge pressure. Any tendency of the surround 65 centric inner and outer walls de?ning a ?uid
ing ?uid to seep between the inner surface of wall
passage therebetween and forming an open
I8 and the outer surface of the oil chamber wall
ended chamber, a motor within said chamber,
56 is prevented by sealing ring 82 and it will be
an oil chamber positioned within said chamber
noted that such sealing ring will only be sub
adjacent one end of the motor and comprising
jected to the submergence pressure and not to the
axially-spaced radial walls and a cylindrical wall
discharge pressure. At the outer or upper end of
which is integral with the radial walls and tightly
the pump any tendency of the surrounding ?uid
?ts the inner surface of the inner concentric wall
to pass between walls 98 and I02 is prevented by
and which is formed with an annular recess in
sealing ring I I0 which, it will be noted, is subject
its periphery adjacent the motor, an annular
only to the submergence pressure. Sealing ring
ridge formed on said inner concentric wall be
2,404,685
5
6
tween the motor and oil chamber and being ad
jacent said annular recess, and sealing means
positioned in the annular recess and adapted to
be compressed between the bottom of the recess
and said ridge by movement of the oil chamber
toward the motor.
3. A submersible pump comprising spaced con
therebetween and forming an open-ended
chamber within the inner wall, a motor with
in said chamber, a cylindrical wall extend
ing from the motor and being within and
concentric with and of less diameter than said
inner wall, a generally radial wall connected to
said cylindrical wall at the outer end thereof and
centric inner and outer walls de?ning a ?uid pas
forming a closure for the open end thereof and
having an opening therein for the passage of a
sage therebetween and forming an open-ended
chamber therein, a motor within said chamber, 10 cable, means for sealingly closing the space be
tween the cylindrical wall and the inner wall,
an oil chamber positioned within said chamber
and means for compressing said sealing means to
adjacent one end of the motor and comprising
increase the sealing effect thereof.
axially-spaced radial walls and a cylindrical wall
9. A submersible pump comprising a casing
formed integrally with the radial walls and tight
having spaced concentric cylindrical walls form
ly ?tting the inner surface of the inner concentric
ing an annular passage for ?uid therebetween,
wall, a ?ange extending inwardly from the inner
means closing said passage at one end and hav
concentric wall adjacent one end of the oil cham
ing an opening therein for the discharge of fluid
berjmeans rigidly attaching the oil chamber to
from said passage, a motor unit removably mount
said radial ?ange, and sealing means between
ed in the space within the inner wall, a pump im
the outer end edge of the inner concentric wall
peller, a shaft operatively connecting the motor
and said ?ange and being in sealing engagement
to the impeller, volute chambers surrounding the '
with the inner concentric wall.
impeller and connected to said casing to discharge
4, The submersible pump structure according
into said annular passage ?uid delivered to said
to claim 3, comprising in addition means for
volutes by said impeller.
compressing the sealing means axially of the
inner concentric wall to thereby force the same
tightly into engagement with the inner concentric
wall.
5. The submersible pump structure according
to claim 3, comprising in addition, an annular ~,
member having an L-shaped cross-section dis
posed between the ?ange and the oil chamber
and having one arm thereof surrounding the oil
chamber and being in engagement with said seal
ing means, and means for moving said annular
member toward and away from the sealing means.
6. In a submersible pump, spaced concentric
inner and outer walls de?ning a ?uid passage
therebetween and forming an open-ended cham
ber within the inner wall, a motor within said
chamber, a generally radial wall closing one end
of the chamber and being entirely within said
inner wall and having an opening therein through
which an electric cable is adapted to pass, and
sealing means within said opening to prevent the leakage of ?uid between the cable and the wall
of the opening.
'7. In a submersible pump, spaced concentric
inner and outer walls de?ning a ?uid passage
therebetween and forming an open-ended cham 55.)
ber within the inner wall. a motor within said
chamber, a cylindrical wall extending from the
motor and being within and concentric with and
of less diameter than said inner wall, a gener
ally radial wall connected to said cylindrical wall
at the outer end thereof and forming a closure
for the open end thereof and having an opening
therein for the passage of a cable, sealing means
within said opening for preventing the passage of
?uid between the cable and the wall of the open
ing, and an annular radial wall closing the space
between the cylindrical wall and the inner wall.
8. In a submersible pump, spaced concentric
inner and outer walls de?ning a ?uid passage
10. A submersible pump comprising a casing
having spaced concentric cylindrical walls form
ing an annular passage for ?uid therebetween,
said passage being closed at one end and having
an opening at said end for the discharge of ?uid
therefrom, a motor disposed in the space Within
the inner wall, means connected to each end of
the motor and extending axially therefrom in op
posite directions and being respectively release
ably attached to said inner wall whereby the
motor may be removed from its position within
said casing, a pump impeller at one end of said
casing, means operatively connecting said im
peller to the motor, and means for conducting
?uid delivered by said impeller to said annular
passage.
11. A submersible pump comprising spaced con
centric cylindrical inner and outer walls de?n
ing an annular ?uid passage therebetween and
an open-ended chamber within the inner wall,
said walls being joined at one end of the pump
to close said annular passage and having a ?uid
delivery opening therein at said end, impeller
means at the other end of the pump having access
to the exterior thereof, means for directing ?uid
delivered by said impeller into said annular pas
sage, a motor in the chamber within the inner
wall, means drivably connecting the motor to the
impeller, sealing means preventing the passage of
?uid surrounding the impeller into contact with
the motor, means at the delivery end of the pump
and disposed entirely in the chamber within the
inner wall for preventing the passage of ?uid from
the exterior into contact with the motor and hav
ing an opening through which an electrical cable
is passed to the motor, and sealing means pre
venting the passage of ?uid through said open
ing and about said cable.
VAINO A. HOOVER.
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