US 1926446 A
Description (OCR text may contain errors)
Sept. 12, 1933. KLOSSQN 1,926,446
Filed Sept. 8, 1931 2 Sheets-Sheet 1 if 16 J 19 I l 25 I INVENTOR i i 4 Milne! EJ056012,
1 BY 6560mm ATTORNEYS Sept. 12, 1933.
M. M. KLossoN PUMP Filed Sept. 8, 1931 2 Sheets-Sheet 2 INVENTOR 2 MbbaelMfUmmn,
@MM ATTORNEYS Patented Sept. 12, 1933 .PUMP
Michael M. Klosson, Kenmore, N. Y., assignor to Buffalo Pumps Incorporated, Buffalo, N. Y.
, Application September 8, 1931. Serial No. 561,745
This invention relates to pumps and particularly to that class of such devices as are especially adapted for pumping liquid having solid material in suspension. The pump of my invention comprises, generally, a permanent outer casing having fluid inlet and'exhaust openings and a pump chamber, and an inner casing interfltting within and removably carried by the permanent casing. The inner casing houses an impeller drive shaft and water sealing means therefor, a portion of the inner casing, larger than the impeller in the pumping chamber, complementing the outer casing to complete the pumping chamber, in such manner that the inner casing, with the impeller, may be installed within or removed from the permanent casing as a unit, for purposes of cleaning, adjustment, or repair. The fluid passages through the pump are of regular and uninterrupted contour and the parts are so arranged that the impeller is the only moving part within the fluid passage, so that resistance to fluid flow and the possibility of clogging of the passages are minimized.
These and other objects and advantages will become apparent from the following description of one typical embodiment, reference being made to the accompanying drawings, wherein:
Fig. 1 is a vertical elevation of a complete pump unit, portions of the structure upon which the device is mounted being shown in section;
Fig. 2 is a vertical section of the pump unit of Fig. 1, portions thereof being broken out to permit of enlargement of the view; and
Figs. 3 and 4 are horizontal cross-sectional views taken along line IIIIII and IVIV, respectively, of Fig. 2. 4
As shown in Fig. 1, the pump unit, indicated generally at 10, may be suitably supported, as in the illustrated construction, which has a bottom wall 11, and a cover 12. The outer or permanent casing of the pump has a lower tubular section 13, mounted upon a base pedestal 14 which is provided with fluid intake openings 15, and an upper section 16 having a peripheral flange 17 at its upper end which may be secured, as shown in Fig. 2, to a supporting ring 18 disposed about an opening in the cover 12. The lower end of section 16 has a flange 19 with a recessed bottom 1 face 29, which receives intermediate or pump chamber portions 21 and 22 of the permanent outer casing, the sections 16 and 21 being secured together by screws. Flanges are provided at the adjacent ends of sections 21 and 22, through which connecting bolts extend. Section 22 is joined to the lower casing section 13 by a reducer 23. The intermediate section 21 is of generally frustro-conical shape and has its outer wall spaced from inner wall 24 by webs 25 to provide peripheral fluid discharge. passage 26. Wall 24 terminates inwardly in a circular opening 30 of slightly smaller diameter than the interior of the section 16.
An inner casing 27 has a lower end portion 28 of frustro-conica1 shape for seating within the opening 30, forming a continuation of the wall 24. The space between the portion 28 and the outer walls of the outer casing section 21 form a continuation of the passages 26 which merge into the pumping chamber 29. The upper end of the inner casing 27 is flanged as indicated at 31 in Fig. 2, and is secured by screws to the lower face of a motor pedestal 32, the latter resting upon and normally being secured against the upper face of flange 22 of the section 16, by bolts 33. A motor 34 is mounted upon the pedestal 32 75.
and an impeller actuating shaft 35 extends downwardly from the motor throughthe pedestal 32 and the inner casing 27.
Packing material 36, for preventing water and gases from rising from the interior of casing 27, is fitted in a recess in the lower portion of the pedestal, and is held in place by a split stuffing gland 37. Access may be had to the pedestal interior through openings 38, shown in Figs. 2 and 3, either for adjusting the gland or for applying oil to the packing, an oil passage39 being formed in the pedestal bottom for the latter purpose. 7
A bearing 41, preferably of the oilless type, is fitted to the bottom portion of the casing 27 for journalling the lower end of the shaft 35,. Packing 42 is placed beneath the bearing for preventing entrance of liquid into the bearing or into the interior of the casing, being held in place by the impeller 44, which is preferably keyed to the shaft. As illustrated in Fig. 2, the packing 42, comprises a plurality of washers flttedbetween the bore of member'28 and the shaft 35, the lower washer abutting the hub of the impeller 44 and the upper washer abutting the bearing member '41, and a coiled spring extending about the shaft and compressed between the upper and lower washers. The impeller is retained on the shaft by a cap nut 45, a set screw 46 being thread- 5 ed into the nut and against the shaft 35 for looking the cap nut in place. Lubricant may be applied to the packing 42 through a conduit 47, which extends from the motor pedestal 32 to a groove 48 about the packing. The impeller 44 0 r may be of any suitable form, but is preferably of the multiple-vane type illustrated.
It will be understood that upon rotation of the shaft an impeller by the motor 34, sludge and liquid will be drawn through the openings 15 in the base pedestal 14, lifted vertically through the conduit 13, and expelled radially through the exhaust passage 26. The outer end of the latter is preferably of gradual curvature and will be efficient for conducting fluid in either direction. Thus, by reversing the direction of rotation of the motor and impeller, liquid may be drawn radially into the passage 26 and expelled from the bottom of the section 13 and through the openings 15. 7
The lower surface of the motor pedestal 32 is shouldered to provide a protuberance 32to seat within the interior of the casing section 16. This provides, in conjunction with the packing 36 and gland 3'7, a substantially tight seal against gas and liquid in the casing 16 and 2'7, thereby preventing such substances from reaching the motor.
The impeller blade andthe enlarged end portion 28 of the inner casing are of smaller radius thanthe opening 30 and the interior of the upper permanent casing section 16, so that upon removal of the bolts 33, the assembly, including the impeller, inner casing, motor pedestal and motor, may be withdrawn as a unit from the outer permanent casing, either for the purpose of renewing or for repairing parts or for cleaning them, without the necessity of workmen entering the space beneath the cover 12.
It will further be'understood that the specific arrangement and formation of the parts herein described and illustrated is merely exemplary of the principles of the invention, which may be applied to devices having different structural characteristics, all within the provision of this invention.
What is claimed is:
1. In a pump, a pair of vertically arranged outer casing sections comprising a pump cham- I her, a supporting casing section fixed in superimposed relation to the uppermost of said pair of sections, the latter having a peripheral fluid passage extending upwardly and outwardly from the lower of said 'pair of sections, a motor pedestal for supporting motor means superimposed upon said supporting section and removably secured thereto, an inner casing section secured to the pedestal and extending downwardly through the supporting casing section and interfitting' with the uppermost of saidpair of sections, the lower end of said inner casing section forming a portion of the upper wall of said peripheral fluid passage, an impeller shaft extending from said motor means through said inner casing, and an impeller in said pump chamber secured to the shaft, said motor means, pedestal, inner casing,
shaft and impeller being removable as a'unit from the other of said casing sections.
2. In a pump, an outer casing section, a medial portion of said casing being of substantially frustro-conical shape, an annular wall spaced by Webs from the outer walls of said frustro-conical portion and cooperating therewith to form an axially and radially extending fluid passage, said annular wall having a central opening concentric with the passage through said casing, an inner casing section extending through the end of the outer casing adjacent the enlarged end of said frustro-conical portion, one end of said inner casing sectioninterfitting in said opening and providing an inward continuation of said annular wall, the other end of said inner casing sec tion being releasably secured to the outer casing, an impeller within said outer casing adjacent the reduced end of the frustro-conical portion thereof, and a drive shaft for the impeller extending through said inner casing, said impeller being of smaller diameter than the opening in the annular wall, whereby the inner casing section, impeller and shaft may be withdrawn as a unit from the outer casing.
-3. In a pump, an outer casing section extending between and secured to upper and lower supporting structures, a medial portion of said casing being of substantially frustro-conical shape, an annular wall spaced by webs from the outer wall of the frustro-conical portion and cooperating therewith to form an upwardly and outwardly extending fluid passage, said annular wall having a central opening concentric with the passage through the casing, an inner casing section extending downwardly from the upper end of the outer casing, the lower end of said inner casing being of substantially conical shape and interfitting in said opening to provide an inward and downward continuation of said annular wall, means at the upper end of said inner casing and above said upper supporting structure for releasable securement to theouter casing, an impeller shaft extending through the inner casing and an impeller carried thereby beneath the conical end of the inner casing, and packing means for said shaft associated with the inner casing at the upper and lower ends thereof, the inner casing, impeller and impeller shaft and said means being adapted to be withdrawn as a unit from said outer casing by means above the upper supporting structure.
4. In a pump, a supporting casing having a tubular bore extending substantially vertically therethrough, said bore communicating with an opening through the casing adjacent the lower end of said casing and with an annular opening through said casing intermediate of the upper and lower ends thereof, means at the upper end of the casing for supporting the same, an impeller shaft extending through the bore of the supporting casing and carrying an impeller disposed between' the first mentioned opening and the annular opening for effecting fluid passage between said openings, a tubular member housing said impeller shaft and extending through the bore of the casing between the impeller and the upper end of the casing, wall means at the lower end of said tubular member fitted to the bore of said casing to cooperate with said annular opening to provide an annular fluid passage above the impeller, and means at the upper end of the tubular member for supporting the latter in' secured relation to the casing; said tubular member and wall means at the lower end thereof and the impeller being of smaller diameter than thebore of the casing thereabove, whereby they may be withdrawn as a unit from the upper end of said casing.
' MICHAEL M. KLOSSON.