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Патент USA US3090329

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May 21, 1963
H. M. STANLEY
3,090,319
PUMP LINER
Filed June 30, 1961
6 Sheets-Sheet 1
IN VEN TOR.
HsuomswMwaewaSmw
/-//.sA rraeus v
May 21, 1963
H. M. STANLEY
3,090,319
PUMP LINER
Filed June 30, 1961
6 Sheets-Sheet 2
INVENTOR.
IL/ENDERJoMMUSGKa vzSmuur
H/s A 1' TOEHEY
May 21, 1963
H. M. STANLEY
3,090,319
PUMP LINER
Filed June 30, 1961
6 sheets_sheet 3
Fig.3
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IN VEN TOR.
Haws/2.5 ONMUSG'RO v5 57% AIL EY
H/J A TTOENEY
May 21, 1963
H. M. STANLEY
3,090,319 '
PUMP LINER
Filed June 30, 1961
6 Sheets-Sheet 5
Fig.7
76
‘
INVENTOR.
HEHDERSONMUSGK’OVE STANLEY
May 21, 1963
H. M. STANLEY
3,090,319
PUMP LINER
Filed June 30, 1961
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6 Sheets—$heet 6
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INVENTOR.
HENDERSOHMUSGEOVESTANLEY
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United States Patent 0 rice
1
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Patented May 21, 1963
2
chambers. The liner comprising this invention thus has
3,099,319
Henderson Musgrove Stanley, Fairmont, W. Va., assignor
to Helmick Foundry-Machines Company, Fairmont,
the involute formed therein. If it is allowed to Wear
until it has put a hole in the liner and also the housing,
the latter may be welded or patched and a new liner
slipped in place, which provides a relatively new pump
PUMP LINER
W. Va., a corporation of West Virginia
Filed June 30, 196i, Ser. No. 121,038
11 Claims. (Cl. 103-103)
without removal, which cannot be accomplished with the
present ?uid machines.
The liner comprising this invention is provided with an
annular perimetral wall forming a chamber to receive
This invention relates generally to ?uid machines such
as blowers and liquid pumps and more particularly to a 10 and guide the ?uid impelled radially by the impeller. It
removable annular liner to withstand the abrasion of
products carried through such ?uid machines.
The problem in blowers and pumps and other ?uid
is also provided with annular inturned ?anges that extend
on one side to the shaft seal support ‘and on the other
side to the inlet or vortex of the impeller. These ?anges
machines is the provision of a removable liner that may
being an integral part of the liner provide an assurance
be quickly removed and replaced to avoid extended loss 15 that no part of the casing is eroded by the ?uid circulated
of the service of the ?uid machine.
If the housing,
through the operating chamber. These liner parts ‘are
readily replaceable and the ?uid machine may be kept
whether it is lined or not, wears due to erosion it is
necessary to replace the whole machine. This requires
the removal of the drive couplings or the motor drive
together with the ?uid machine in order to repair the
same.
operating at maximum e?iciency by periodically chang
ing the liners. Fresh water is supplied to the liner ?anges
and the impeller surfaces provide a natural centrifugal
pump surface when coacting with the outer circular wall
of the impeller and thus avoid wear by the eroding ?uid
returning toward the rotary axis clue to the radial flow
It not only takes time but the next machine fre
quently requires different mounting =blocks because it is
of a different style, make, or is changed to require the
replacement to be tailor ?tted when installed. Even
a stand-by machine of the same make and style creates 25
problems because of slight differences. When ?uid ma
chines of this character are mounted to supply a con
tinuous service, such ‘as the removal of quenched ash from
the combustion chamber, this has to be continuously
of the fresh water.
The liner with the side ?anges permits an improved
structural form of liner wherein the perimetral portion
that collects the ?ow stream from the radial discharge
of the impeller may be made thick and heavy, whereas
the ?anges which are not subjected to this wear may
sluiced away or irreparable damage may be caused by 30 be thinner and light. The material making up the liner
may be stone, glass, plastic, an elastomer, a metal such
These problems are'overcome by the provision of a
as chrome, nickel, steel, stainless steel, mild steel cladded
?uid machine having a removable liner. The liner of
with stainless copper, aluminum, or cast steel, or iron,
?uid machines comprising this invention is preferably a
chrome nickel cast iron or other suitable materials. The
partible liner than can readily be replaced without even 35 latter is successful for ?uid machines transporting a slurry
uncoupling the impeller drive or the inlet or the outlet
of ash which is abrasive. Thus in forming these liners
failure to remove as well as mere loss in e?iciency.
connections.
By retaining the driving connection this
by drawing, cutting, forging, or casting, the correct shapes
invention provides a novel and quick mode of removing
may be made ‘accurately to place the heavy walls where
a worn and ine?icient volute lining by merely unbolting
needed and form the‘ ?anges with thinner walls where _
and removing the top half of the housing. The top half
wear is not prevalent.
of the housing has a ?at ?ange connection to the bottom
Another object is the provision of a seat on‘ the interior
half and may contain the outlet, which permits the liner
of the housing which cooperates with seats on the liner
to be slipped out when the housing is unbolted and re
parts and holds them properly in the housing when the
moved. The top liner is withdrawn from the top half
latter is clamped together. This is accomplished with
45
of the housing and the bottom half of the liner may be
the use of mating ?anges secured by ?ange clamping
rotated or slid around from under the impeller and
replaced.
If the outlet throat is in the bottom or stand half of
I bolts together with a gasket of selected thickness and
quality which when squeezed between the parting ?anges
of the housing will compress and permit a clamping force
the housing, the housing may be separated through the
50 to be applied through the seat on the housing and hold
outlet.
the liners in place. The gasket also seals and supports
The liner halves may he slid around from under the
clamping pressure between the ?anges, thus limiting the
impeller by merely unbolting and removing the top half
pressure applied to the liner parts. These seats may be
of the housing ‘and the top section of the liner if the
inner annular surfaces on the housing that engage the
inner annular surface of the housing is circular. This is
liner when‘ the housing is bolted along radial planes pass
true when the housing has sufficient clearance for the 55 ing through the axis of rotation. Again these seats may
liner, regardless of whether the outer perimetral surface
be spaced seats on the shaft side or" the housing and the
of the liner follows the volute curve or follows a circular
?ange, gasket and ‘bolts secure the inlet member and
path. If the housing follows a volute curve one merely
slides the liner toward the largest diameter under the
impeller to the top to remove the same.
The liner comprising this invention is preferably par
ti‘ole in radial planes which may or may not coincide
with the parting of the housing. The housing is prefer
move its shoulder against the liner to seat the same axial
ly against the spaced seats on the shaft side of the hous
ing. Thus the liner may be properly seated axially and
transversely of the rotary axis and properly held in‘ place
by ‘three vdiiferent structures and‘ any one of them is su?i
‘cent to properly locate and hold the liner.
ably made in two parts and separated along one straight
This improvement also contemplates the provision of
plane with the liner split along the same plane. The 65 a tubular inlet that is secured to the housing and extends
liner may be split in three or more parts, the planes of
into the liner ?ange and toward the vortex of the impel
which are radial.
However in the preferred form the
ler. This not only insures undisturbed ?ow past the
split liner to the impeller vortex but has an abutment to
and the liner part is shaped so that it may be slid around 70 engage the side of the ?ange and seat i-t axially as pre
in the housing from under the impeller.
viously stated.
Fluid machines of this character preferably have volute
Another object is the provision of a bell housing in the
liner is split along the same straight plane as the housing
3,090,319
4
housing 13 which has a frusto conical bore 14 and an ex
ternal annular seat 15. The inlet spool 16 is also pro
vided with a mating frusto conical bore 17 and is pro
inlet side of ‘the housing that is merely boxed in by the
liner. In liquid pumps, fresh water is supplied on the
shaft side to the’ housing and leaks past a wiper and
around the outer perimetral surface of the liner to this
vided with end ?anges 18 and 20, the ?ange 18 being
secured with a gasket member 21 and the ?ange 12 to
the lower member housings 2 and 4 by the bolts 22 which
are secured in the threaded openings 23 of the annulus
formed by the surfaces 8 and 10 as shown in FIG. 1.
The ?ange 20 is also provided with bolt slots for secur
annular o?set or bell chamber. Thus fresh clean water
is actually circulated past the seats and around the liner.
The water ?ows under each of the annular ?anges of the
liner to get to the operating chamber on both sides of the
liner and also to the vortex on the inlet side. This offset
or bell chamber has a different purpose when the ?uid
ing the inlet spool 16 to a line or other source of ?uid to
be pumped.
machine is opened. By removing the top half of the
housing and both halves of the liner, the impeller may
As shown in FIG. 1, the opposite sides of the pump
housing sections 2 and 4 are provided with a semicircular
surface 23 and 24 on which is placed the gasket 25 and
and the impeller is removed from the housing by merely 15 the annular shaft seal supporting member 26 having an
annular ?ange 27 which is secured to the housing sec
lifting it up and out.
tions 2 and 4 by the bolts 28.
An alternate wayof removing the impeller is by pro
The seal supporting member is provided with a bore
viding a thick coupling in the shaft which when with
to receive the shaft 3t? and an enlarged bore forming the
drawn from the impeller the latter may be raised from
stu?ing box 31 having a threaded gland member 32. The
.the housing without the need of the annular offset charn~
be loosened and unscrewed from the shaft and moved into
this chamber. The inlet tubular member is withdrawn
shaft member 30 extends into the housing and is pro
vided with a recess for receiving the locking ring 33
ber in the housing and without withdrawing the tubular
inlet or the bottom half of the liner.
Thus the lower
outwardly of the groove holding the locking ring 33.
housing section and any other connections need not be dis
The shaft is threaded as illustrated at 34 which is re
25 ceived in the threaded opening 35.
install a new liner and replace the impeller.
Referring now to FIGS. 1, 5 and 6, the nut 36 has a
Another object is the provision of an offset on each
turbed to rebuild the pump or blower and anyone may
plurality of bayonet locking ?anges 37 the end of which
side of the operating chamber formed by the liner in
which to receive the disc sides of the impeller. By over
lying these cylindrical surfaces of the impeller disc sides
the liner protects them from eroding. Thus properly
bayonet locking ?ange terminates in an axial recess 38
as shown in FIG. 6.
30 >
selecting the material for the impeller and the liner so
that they match each other in wear, both requiring re
placement at the same time, provides economy in oper
.ation.
Another object is the provision of an overhang at the
perimetral section of the liner parts in the direction of
rotation of the impeller to reduce the friction‘ of the circu
lating ?uid as it travels from one volute section of the
liner to the other.
Other objects and advantages of this invention appear
hereinafter in the following description and claims.
The accompanying drawings show for the purpose of
exempli?cation without limiting this invention or the
claims thereto, certain practical embodiments illustrating
the principles of this invention, wherein:
45
FIG. 1 is a view in side elevation with parts in section
As illustrated in FIG. 5 the socket 40 in the impeller
41 has corresponding axial slots 42 and adjacent under
lying pockets 43 for receiving the bayonet locking ?anges
37 of the nut 36.
When the nut is inserted to its full
depth it is turned in the direction of the arrow which
is equivalent to the direction of rotation of the pump
and these bayonet locking ?anges slide into their cor
responding pockets 43 to become jammed. When the
nut 36 has been centered in the socket 4t} and in proper
balanced relation relative to the impeller the nut is
leaded in by inserting lead or babbitt through the grooves
38, thereby locking the nut in position.
The shaft 30 extends through the aligned split ibear
ings 44, 45, 46 and ~47 mounted in the bearing stand
48 and the bearing cap 50. The end bearings 44 and
47 are retained directly between the stand and cap.
However the intermediate bearings 45 ‘and 46 are re
illustrating this invention.
tained within the split sleeve member 51 the intermedi
FIG. 2 is a view in transverse section illustrating the
ate sec-tion of which is enlarged as indicated at 52 to
?uid machine.
receive the outer races 53 spaced by the abutment mem
FIG. 3 is an end view of the structure shown in FIG. 1. 50 ,-ber 54., The corresponding inner races 55 are properly
FIG. 4 is a view in horizontal section with the upper
seated against the ?xed shoulders 56 and the movable
half of the housing moved.
shoulder 57 of the shaft 30. ‘These are the well known
FIG. 5 is a perspective view of the rotor socket for
conical bearings receiving the thrust load imposed on
receiving a threaded shaft.
'the impeller 41.
FIG. 6 is a perspective view of the rotor shaft nut.
55
In order ‘to properly locate the impeller 41 in the hous
FIG. 7 is a view in transverse section illustrating a
ing sections 2 and 4 mechanical adjustment such as il
modi?ed form of the ?uid machine.
lustrated at '60 may be employed which consists in a
FIG. 8 is a view in side elevation with parts thereof in
nonround member 61 in the center of the stud 62 that
section of a ?uid machine without a liner illustrating one
has threads of opposite hand at either end which are
phase of this invention.
60 received in corresponding threaded sockets ‘63 and 64
FIG. 9 is a view in side elevation with parts in section
on the bearing stand 48 and the lower housing section
illustrating a further modi?cation of this invention.
2. Thus by rotating the nonround portion 61 the pump
Referring to FIG. 1, the ?uid machine 1 comprising
this invention depicts a centrifugal liquid pump having
housing is moved axially in either direction to properly
locate the impeller 41 in the housing. Any suitable ad
a dual housing, ‘the lower section 2 provided with feet 3 65 justing means can be employed for this purpose.
and mounted thereon is the upper housing section 4 which
Referring speci?cally to FIGS. 1 to 4, the interior of
is split along a plane or medial line extending through
the housing sections 2 and 4 is provided with an an
the rotary axis. The medial line of each housing sec
nular chamber 65 in the form of a volute commencing
tion is de?ned by the lower and upper ?anges 5 and 6
at 66 and terminating at the point of tangency 67. This
which receive therebetween the duplicate ‘gasket sections
7. Each housing section is provided with semicircular
chamber terminates on the axially disposed annular seats
seats 8 and 104 on the inlet side of the pump which pro
duces a complete annulus as illustrated in FIG. 1 upon
de?ne the same.
68 and 69 on opposite sides of the chamber 65 and which
On the shaft side of the housing sections 2 and 4 ex
which is mounted a gasket 11. The annulus formed by
the surfaces 8 and 10 receives the ?ange 12 of the inlet 75 tend the annular surface 23 that faces the ?ange 25 and
3,090,319
6
is provided with a bore provided with a sliding ?t for
and may ?ow past the notches 1001 at the joints between
the cylindrical portion 70 of the seal supporting mem
the two liner sections so as to ?ow upwardly around the
ber .26.
outside of the liner to ?ll the bell shaped offset chambers
On the opposite side of the chamber 6g the hous
72 and ?ow outwardly to the vortex of the pump. Water
ing sections 2 and 4 extend axially as illustrated at 7.1
also seeping past the wiper 9% will ?ow radially outwardly
to provide the bell chamber 72 and terminate in the an
between the disc 92 of the impeller 41 and the inner face of
nulus 73 which also provides a sliding ?t with the inlet
the liner which produces a centrifugal pump action in ?ow
member 13.
ing the fresh water radially outwardly across the offset
The liner 74 follows substantially the shape of the
97 to the volute chamber 75. This maintains the exterior
chamber 65 to provide the annular volute chamber 75. 10 of the liner clean and prevents dirt, corruption or abrasives
On each side of the chamber the liner extends axially
from reaching the packing gland 311.
to provide the seats 76 and 77 which correspond and
As shown in FIG. 7, the housing sections 102 and 1611
match with the seats 68 and 69 of the housing. These
are split radially ‘along the diameter 103‘ to the center
are matched seating surfaces through which pressure is
of the outlet 104 and are bolted together by means of the
applied by the clamping bolts 78 which compress the 15 bolts 78. The liner 74 is the identical liner to that shown
gasket 7 to permit a predetermined pressure transmitted
in FIGS. 1 to 4 having the sections "81 divided at '79. Here
through the corresponding seats 68 and 76 and 69 and
when the outlet 104 is formed in the ‘bottom section of
77 to clamp the liner 74 in its proper position in the
the housing having the feet 105‘ the split is merely re
housing.
located.
The liner 74 is preferably made in two sections 80 20
Referring to FIG. 8 the structure therein shown is the
and ‘81 which are ground along the same plane as the
same as that illustrated in FIG. 1 with the exception that
housing and de?ned as a plane in which the gasket 7
the liner 74 has been removed and. the diameter of the
occupies.
impeller ‘discs 91 and 92 is slightly increased. The di
The gasket 7 is chosen to permit a predetermined
ameter of the chamber 72 is the same size.
pressure to be transmitted through the seats 68 and 7-6 25
In each of the structures as shown in FIGS. 1 and 8
and 69 and 77 between the housing and the liner not
if the upper housing section 4 of the housing is. removed
the upper section 80» of the liner may be removed in
only to properly seat the liner but hold the liner halves
FIG. 1 ‘and then the lower section 81 may be rotated
in tight mating engagement in a single transverse medial
in a counterclockwise direction so as to ride under the
line or split 79. Thus the annular seats and the engaging
impeller 41 ‘until it comes out of the open top where it
surfaces of the two liner sections are ground so as to
can be removed.
properly seat under clamping pressure and prevent leak
age.
The shaft 30, which is the drive, prevents the impeller
from being rotated, and by placing a bar between the
The shaft side of the lower and upper housing is pro
blades 98' of the impeller one can unscrew the impeller
vided with spaced annular pads 82 and 83 and the cor
responding surfaces on the liner 74 are likewise ground 35 41 from the shaft 361 as the impeller unscrews from the
shaft 30‘ which is held against axial movement. The
to ?t the pads. Thus by selecting a predetermined
impeller moves to the lift in these views until it occupies
gasket 11 under the ?ange 12 of the inlet member 13'
the chambers 72 at which time it is completely unthreaded
the bolts 22 will supply suf?cient pressure through the
from the shaft 3%. If the inlet sections 16 and 13‘ are re
shoulder 115 to the annular ?ange .84 of the liner 74
moved from the housing then the impeller in poth struc
to move the liner axially until it seats on the pads '82
tures of FIGS. 1 and 8 may be raised vertically out of the
and 83, thereby moving the liner relative to the housing
housing chamber without otherwise dismantling the lower
and to the impeller 41 which has been adjusted relative
section of the housing and its relation to the bearing stand
to the housing.
43. Thus one can replace either the impeller 41 in FIG.
As an alternative of applying axial force to the liner
74 a series of four bolts 85 are threadably received in 45 8 or the impeller 41 and both line sections 8%)‘ and 81 in
FIG. 1 Without disrupting or otherwise disengaging the
openings of the housing sections 2 and 4 and abut the
rest of the mechanism. In this manner the pump can be
liner 74 axially until it seats against the annular pads
completely rebuilt in a very short period of time.
82 and 83». The washer '86 is placed under the bolt head
Referring now to FIG. 9, it will be noted that the
85 to seal the same. Thu-s we provide two methods for
50 chamber 72 has. been eliminated from the housing mem
pre-positioning the liner 74 within the housing.
bers 2 and 4 and the cross section of these housing sec~
As shown in FIGS. 2 the opposite sides of the liner
tions follow substantially the shape of the iliner 74.
sections '80 and 81 along their medial split 79‘ will overlie
The shaft is divided into sections 3%‘ and as’ and is
the next adjacent portion of the volute chamber 75 as
provided with a coupling 165 having a removable inter
illustrated by the overhang 87 on the left of FIG. 2 and
the overhang 88 on the right of FIG. 2 in the direction of 55 mediate section 106 that may be completely removed
without disturbing the thrust bearing 167. When the
travel of the liquid ?uid, which in this instance is counter
section 106 is removed that portion of the shaft 30 attached
clockwise as produced by the blades 90‘ of the impeller
to the impeller 41 may be unscrewed from the impeller
41 which connect the discs 91 and 92 on opposite sides of
and as it unscrews from the impeller it moves to the right
the impeller 41. Spaced between the blades is connected
the vortex 93 of the impeller which is slightly larger than 60 in FIG. 9 until it clears, after which time the impeller
may be raised vertically out of the lower section 2 of the
the increasing frusto conical bore 14 of the inlet.
housing when the upper section 4 is removed. Otherwise
A vane made in two sections 94 and 95 depends fro-m
the pump structure is the same. The bearings 44 and 45
the top frusto conical bores of the inlet members 13 and
16. These vanes constitute a single Vane to prevent pre
merely support the shaft section 39', whereas the bearings
The cylindrical surfaces de?ning the perimeter of the
annular housing with integral radial ?anges and having
rotation of the ?uid into the inlet due to suction of the 65 46 and 107 support the shaft section 30’.
I claim:
vortex. These vanes are pre-aligned as are the housing
1. A centrifugal ?uid pump consisting of a two-part
parts with dowel pins.
an axial inlet and a circumferential discharge connected
impeller discs 91 and 92 are covered by the offsets $6 and
70 to an outlet, said housing with its ?anges partible along a
97 on each side of the liner 74.
single medial transverse line with pressure exerting means
The seal supporting member ‘26 is provided with a
to secure the parts together, a rigid two-part annular liner
?uid inlet 98 for receiving a supply of fresh water at
having integral radial ?anges removably mounted in said
pressure which is materially higher than the pressure pro
housing to form a pump chamber ‘defined by a comple
duced by the pump and which seeps under the wiper it?‘
mentary circumferential discharge and an impeller en~
‘
>
3,090,319
,
7
closure, said liner with its ?anges partible along the same
medial transverse line as said housing, said liner ?anges
forming the sides of said impeller enclosure and on
one side circumscribing the inlet thereto, cooperating com
plementary seats located on opposed surfaces on each
housing and liner part between each ?ange and its circum
ferential discharge to hold said liner parts in mating en
gagement with each other along said medial transverse
8
_
.
said means detachably connecting said impeller to said
shaft to provide for axial movement of said impeller into
said bell of said housing when detached from said shaft
to permit said impeller to be lifted free of said housing
When one part of said housing and liner are removed and
Without disturbing said shaft.
9. The ?uid pump of claim 8 characterized in that said
liner part ?anges on one side of said impeller cover said
bell in said housing, said one liner part being removable
‘line when said housing parts are secured to each other by
said pressure exerting means, a radial discharge impeller 10 slidably from around said mounted impeller to expose said
bell ton enable the lateral movement of the detached im
having an inlet vortex on one side and mounted for ro
peller for removal from said ?uid pump.
tation in said impeller enclosure and having parallel
10. A ?uid pump consisting of a two-part housing
sides radial to its rotary axis and closely adjacent to and
partible along a medial transverse line and mounted for
coextensive with but spaced from said liner ?anges, an
nular marginal surfaces de?ning said liner circumferential 15 operation to form a chamber having an outlet, an axially
removable inlet on said housing, a radially discharge im
discharge and being ?ush with the corresponding inner
peller mounted for rotation in the housing chamber on
surfaces of the radial discharge sides of said impeller, one '
the side opposite to said inlet, said chamber receiving the
of said liner parts being removable‘ from around said
radial discharge from said impeller to convey it to said
mounted impeller when the other part of said liner and
20 outlet, a drive shaft, means detachably connecting said
housing are removed from said medial transverse line.
impeller from said drive shaft to permit said impeller’s
2. The ?uid pump of claim 1 which also includes a
removal from said housing with one housing part re
horizontal offset between the circumferential discharge
moved, a support for said housing, a bearing support for
and each ?ange on both of said housing and liner parts,
said drive shaft, an annular bell in said housing on the
each offset carrying said seats and overlapping the
side opposite to said means detachably connecting said
perimetral edges of the sides of said impeller.
impeller from said drive shaft to provide for axial move
3. The ?uid pump of claim 1 characterized in that said
ment of said impeller in the housing when disconnected
pressure exerting means operating through said seats in
by said detachably connecting means and to permit said
said housing and liner parts also includes gasket means
impeller to be lifted free of said housing when opeend by
for insertion along said medial transverse line between
the housing parts to determine the clamping pressure on 30 the removal of one housing part and said axially remov
able inlet without disturbing said drive shaft or said sup
said partible liner, and bolts to clamp said housing parts
ports.
and said gasket means therebetween to seal said housing
11. A ?uid pump consisting of a two-part housing
parts along said medial transverse line and to seat and
'partible along a medial transverse line and mounted for
hold said partible liner parts together.
4. The ?uid pump of claim 1 which also includes an 35 operation to form a chamber having an outlet, an axially
removable inlet on said housing, a radially discharge im
inlet member in the form of an independent tubular inlet
peller mounted for rotation in the housing chamber on
liner secured to and covering said housing inlet and ex
the side opposite to said inlet, said chamber receiving the
tending toward the vortex of said impeller and overlying
radial discharge from said impeller to convey it to said
said liner ?ange on the inlet side of said-pump, an an
nular shoulder on said inlet liner to engage said partible 4.0 outlet, a drive shaft, means detachably connecting said im
peller from said drive shaft to permit said impeller‘s re
liner ‘?anges on the inlet side of said pump and seat said
moval from said housing with one housing part removed,
liner parts against the opposite side of said housing.
I a support for said housing, a bearing support for said drive
5. The ?uid pump of claim 1 characterized in that the
shaft, a coupling in said drive shaft, a removable inter
wall surfaces at the perimetral junction of said liner parts
' along said medial transverse line overhang into said pump 45 mediate section in said coupling to provide ‘for axial move
ment of a short section of said shaft from said impeller
chamber and in the direction of rotation of the impeller
when detached from the latter to permit said impeller to
to reduce the friction of the circulating ?uid at this junc
be lifted from said housing with one housing part re
tion.
moved and without disturbing said supports.
6. The ?uid pump of claim 1 which also includes axial
pressure exerting means on said housing ?ange on the
inlet side of said pump to bear against the corresponding
liner ?ange on the same side of said pump, and pads be
tween the opposing ?ange surfaces of said housing and
liner on the opposite side of said pump to seat said liner
axially relative to said impeller.
7. The fluid pump of claim 6 wherein said axial pres
sure exerting means are bolt means on said housing ?ange
hearing against said corresponding liner ?ange adjacent
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,608,547
Clark ______________ .._ Nov. 30, 1926
1,727,703
2,312,422
Hause et a1 ___________ __ Sept. 10, 1929
Kumlin et al. ________ __ Mar. 2, 1943
2,365,058
Crawford _l_ _________ .. Dec. 12, 1944
2,800,084
Butler ______________ __ July 23, 1957
15,895
827,590
Great Britain _‘_ ____________ __ of 1907
Germany ____________ __ Jan. 10, 1952
1,015,158
France _______________ __ July 2, 1952
the juncture where the latter ?ange is integral with its cir
cumferential discharge.
.
-
8. The ?uid pump of claim 1 characterized by a shaft,
means detachably connecting one side of said impeller
to said shaft, a bell in said housing on the side opposite
FOREIGN PATENTS
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