US2727468A

US2727468A - Pump

Info

Publication number: US2727468A
Application number: US482710A
Authority: US
Inventors: Joy P Rykken
Original assignee: Individual
Current assignee: DNB NOR BANK ASA NORGE FILIAL SVERIGE
Priority date: 1955-01-19
Filing date: 1955-01-19
Publication date: 1955-12-20
Anticipated expiration: 1972-12-20

Description

J. P. RYKKEN Dec. 20, 1955 PUMP 2 Sheets-Sheet 1 Filed Jan. 19, 1955 Fig. 2

Inu e 111:0 r Jo 13 P. Rz KKen. ,By 3' Cdfys.

J. P. RYKKEN Dec. 20, 1955 PUMP 2 Sheets-Sheet 2 Filed Jan. 19, 1955 mu m l w a K a: R 1 LP u O J United States Patent Oflice 2,727,468 Patented Dec. 20, 1955 PUMP Joy P. Rykken, Kandiyohi, Minn.

Application January 19, 1955, Serial No. 482,710

7 Claims. (Cl. 103-87) My invention relates to improvements in pumps of the centrifugal type, an object thereof being to provide a pump of such character which is exceedingly simple, durable and inexpensive in construction and, yet highly eificient in operation.

Another object of the invention is to provide a pump, as above indicated, which is capable of handling liquids laden with foreign matter, a more particular object being to provide a pump of such nature adapted especially for use in removing water from sumps, pits, reservoirs, ponds, lakes, streams or the like for delivery into irrigation ditches or other drains or elsewhere.

Still more specifically, it is an object of my invention to supply a pump, as aforesaid, employing a rotary impeller of unexacting structural tolerances which is supplied with blades relatively sharply curved at their leading portions in promotion of efficiency, and which occupies an eccentric disposition on the impeller drive shaft, whereby surging in the pump, to the detriment of efliciency, is greatly minimized.

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of con struction hereinafter illustrated and/or described.

In the drawings:

Fig. 1 is a side elevational view of a pump constructed in accordance with my invention.

Fig. 2 is an end elevational view of said structure.

Fig. 3 is a plan view of said structure.

Fig. 4 is an enlarged elevational sectional view in detail taken as on the line 4-4 of Fig. 3.

Fig. 5 is a plan sectional view in detail taken as on the line 55 of Fig. 4, portions of the illustrated structure being broken away to reveal portions of the casing and impeller which otherwise would be concealed.

The illustrated embodiment of my invention has a casing A including an upright tubular discharge section b in the form of a pipe, circular in cross-section, bottomed on a base or footing member 10, said section b having in its side a laterally extending inlet opening 11 located near its lower end. Said casing A further includes a sec- ,tion c, laterally offset from said discharge section b, forming a chamber 12 for the reception of a rotary impeller d, said chamber 12 communicating with the interior of said discharge section b through said inlet opening 11 therein. The offset section c of the casing A consists of a curved wall member 13, a bottom member 14 and a top member 15. Preferably, the wall member 13 and the bottom member 14 are integrally formed from sheet metal, said wall member 13 being provided with an outwardly turned flange 16 formed with bolt-receiving openings 17,

and said bottom member 14 being formed with a liquid ingress opening 18 therein. The curved wall member 13 of said ofl'set section 0 of the casing A extends from one end to the other of the inlet opening 11 in the tubular discharge section b, the ends of said wall member 13 being welded or otherwise suitably joined to said section b at the ends of said inlet opening 11. Likewise, the inner end of the bottom member 14 of the casing section 0 is joined with said section 17 along the lower edge of said inlet opening 11. The flange 16 on said wall member 13 is faced with a reinforcing liner 19 provided with bolt receiving openings 20 registering with the openings 17 in said flange 16. Said reinforcing liner 19 on said flange 16 is fitted with a gasket 21 which has bolt-receiving openings 22 therein. This gasket 21 is endless and, at the inner end of the casing section 0, overlies a flange 23 outwardly turned from the tubular casing section b along the upper edge of the inlet opening 11 therein. The top member 15 of the casing section c may take the form of a cover plate, as shown. It is provided with boltreceiving openings 24 at the marginal portion thereof and is removably clamped, by means of bolts 25, to the flange 16 of the Wall member 13 of casing section 0 in position superimposing the gasket 21, said bolts 25 being received in the

openings

24, 22, 20 and 16 of said top member 15, gasket 21, flange-liner 19 and flange 16, respectively. Said top member 15 of the casing section c is further provided with a liquid ingress opening 26 similar to and arranged in axial alignment with said liquid ingress opening 18 in the bottom member 14 of said casing section 0. The end portion 13a of the curved Wall member 13 of said section 0 of the casing A, hereinafter referred to as a gate portion, is approximately circular, the same constituting a gate for the said rotary impeller d, the detailed construction of which will presently appear. Said gate portion 13a of the curved wall member 13 of easing section 0 and the adjoining wall of the casing section b form a reentrant angle, as clearly seen in Fig. 5. The remaining portion of said wall member 13 of the casing section c, continuing from said gate portion 13a, is of progressively decreasing curvature so that the terminal portion 13b of said wall member 13, opposite said gate portion 13a, is of relatively little curvature. This terminal portion 13b of said wall member 13 joins the discharge section b of the casing A tangentially thereof.

The rotary impeller d, contained within the chamber 12 of the offset section 0 of the casing A, includes a circular body plate 27, the peripheral curvature of which is similar to the curvature of the gate portion 13a of the wall member 13 of said casing c. Said circular body plate 27 is fitted with a hub 28 the bore 29 of which registers with a shaft-receiving opening 30 in said body plate. This hub 30 is fitted on and secured, as by a set screw 31, to an upright drive shaft 32 which extends through said opening 30 in the body plate 27 and through the

liquid ingress openings

18, 26 in the bottom and

top members

14, 15 of said casing section 0, said shaft 32 being mounted and rotated as hereinafter explained. Laterally upstanding from the peripheral portion of the body plate 27 and laterally depending therefrom are impeller blades 33. Carried by the upper edges of the upper set of blades 33 is an upper ring-plate 34 and carried by the lower edges of the lower set of blades 33 is a lower ring-plate 34. It has been found to be entirely practical to weld the blades 33 to the body plate 27 and likewise secure the ring-plates 34 to send blades 33. The ring-plates 34 are of the same diameter as the body plate 27 and are axially aligned therewith. The central openings 34a in said ring-plates constitute liquid inlet ports of the impeller d and they register with the

liquid ingress openings

18, 26 in the bottom and cover

members

14, 15 of the casing section 0. The impeller d is located to one side of and turns freely within said casing section 0 peripherally in close proximity to the gate portion 13a of the Wall member 13 thereof. Said impeller d together with the portion of the wall member 13 of progressively decreasing curvature define between them a progressively Widening passage 35 of volute form leading to the inlet opening 11 in the discharge section b of the casing A. The impeller d is turned by the shaft 32 in a clockwise direction, as seen in Fig. 5, to cause rotation of 'said impeller in the direction of the widening of said passage 35. The impeller blades 33 are curved, the convex sides thereof facing in the direction of such rotation of the impeller d. These blades 33 extend from the inner edges of their respective ring-plates 34, in trailing disposition, to the outer edges of said ring-plates.

Noting the curvature of the impeller blades 33, it is to be understood that the leading end portions of said blades are of sharper curvature than their trailing end portions. This variance in curvature of said blades 33 enhances their ability to cause the ingress of liquid into the impeller d without impairing their ability to impel the indrawn liquid from the impeller into and through the volute passage 35 in the chamber 12 of the casing section c. It is further to be noted that the body plate 27 of the impeller d is eccentrically mounted on the drive shaft 32. 'This is an important feature of the invention in that such eccentricity of the impeller d pronouncedly minimizes the tendency of such an impeller to cavitate and/or cause surging in the pump to the detriment of its efliciency. Said eccentricity, being relatively slight, is readily accommodatcd in the space 36 (Fig. provided between the impeller d and the gate portion 13a of the curved wall member 13 of the casing section 0.

The drive shaft 32 is journaled at its lower end in a bearing 37 mounted on a lateral extension or bracket 38 issuing from the base or footing member of the discharge section b of the casing A. Said shaft 32 is further journaled near its upper end in a bearing 39 mounted on an upper bracket 40 extending laterally from said casing section b. Also mounted on said upper bracket 40 is a motor 41 having a pulley 42 mated with a pulley 43 on the drive shaft 32, there being a belt 44 encircling said

pulleys

42, 43 which serves to transmit power to said shaft 32 for turning the same and the impeller. d mounted thereon.

In use, the pump is lowered into a body of liquid, from which liquid is to be removed. The pump will have its footing 10 resting on the bottom of the sump, pit or the like with the offset section 0 of the casing A submerged in the liquid, and with the motor 41 supported above such liquid. Starting the motor 41, liquid will be drawn into the ingress openings 18, 26' in the bottomand top members 14, of the casing section c, thence into the inlet ports 34a in the ring-plates 34 of the impeller d.

Passing between the blades 33, body plate 27 and ringplates 34 of said impeller d, the liquid is impelled into the volute passage of the chamber 12 of the casing section 0. Passing through said ever-widening passage 35, the liquid is empelled into the upright tubular discharge section b of the casing A through the inlet opening 11 therein and, thence, upwardly through said. discharge section b of said casing A. There being no appreciable cavitation of the impeller d or attending surging of liquid in the pump, the liquid is caused to. ascend in the discharge section b of the casing A without turbulence and in full body, the net effect being that a relatively great quantity of liquid is discharged from the pump in given, time at an expenditure of relatively little energy in rotating the impeller d. Ordinarily, a spout (not shown) will bemounted on the upper end of the discharge section bof the casing A to conduct liquid from the site occupied by the pump. If the pump is to be put to work in water deep enough to submerge the motor 41 and/or belt 44, they, unless waterproofed, will be removed from the pump and a suitable driving medium will be coupled to the upper end of the shaft 32. Also, a suitable tubular extension, as indicated in dotted lines at45, will be coupled to the discharge section b of casing A to direct the liquid to an elevation at which it may be run-off from the device by meansof a spout or the like.

Changes in the specific form of the invention, asherein described, may be made within the scope of what is 4 claimed without departing from the spirit of the invention.

Having described the invention, what is claimed as new and desired to be protected by Letters Patent is:

1. In a pump, a casing including an upright tubular discharge section and a section laterally offset therefrom, said discharge section of said casing having an inlet opening in the side thereof and said offset section of said casing forming a chamber communicating with the interior of said discharge section through said inlet opening, said offset section of the casing consisting of a curved wall member, a bottom member and a top member, each of said bottom and top members being formed with a liquid ingress opening therein,'said curved wall member extending from one end to the other of the inlet opening in the discharge section of the casing, one end portion of said wall member being a gate portion of approximately circular curvature, the same together with the adjoining portion of said discharge section of the casing forming a reentrant angle, said wall member, in continuation of said gate portion thereof, being of progressively decreasing curvature and adjoined at its terminal portion with the discharge section of the casing tangentially thereof, a rotary impeller within said chamber of the offset casing sectionfsaid impeller including a circular body plate ofperipheral curvature similar to the curvature of the gate portion of the wall member of said offset section of the casing, an upper set of blades laterally upstanding from the peripheral portion of said body plate, a lower set of blades Iaterally depending from said peripheral portion of said; body plate, an upper ring-plate carriedby the upper set of blades at their upper edges, the opening in said upper ring-plate registering with the ingress opening in the upper wall member of said olfset section of the casing, a lower ring-plate carried by the lower set of blades at their lower edges, the opening in said lower ring-plate registering with the ingress opening in the bottom member of said ofiset section of said casing, an upright drive shaft extending through the body plate of the impeller, said body plate being secured to said shaft, said shaft being received in the central openings in said ring-plates and in said ingress openings in the bottom and top members of the ofiset section of the casing, said shaft having bearings above" and beneath and removed" from said'olfset section of the casing, said impeller being located to one side of the chamber in said offset section of the casing in relatively close proximity to the gate portion of the curved wall member thereof, said impeller together with the'portion of said wall member of decreasing curvature defining between them a progressively widening passage of volute form leading to the inlet opening inthe discharge section of thecasing, said shaft being adapted to be turned to rotate the impeller in the'direction of the widening of' said passage, the blades of the impeller being curved convexedly in the direction of such rotation and extending from the inner edges of their respective ring-plates, in trailing disposition, to the outer edges of. said ring-plates.

2. In a pump, as defined in claim 1, upper and lower shaft-supporting brackets issuing from the upright tubular section of the casing, the bearings for said drive shaft being carriedby said' brackets, and a motor mounted on said upper shaft-supporting bracket, said motor being operatively connected with the drive. shaft for rotating the same,

3. A pump, as defined in claim 1, wherein the impeller is eccentrically mounted on the drive shaft and the leading portions of the curvedimpeller blades are relatively sharply curved.

4. In a pump, a. casing including a tubular. discharge section and asection laterallyioffset therefrom, said discharge. section of said casing having an inlet opening; in the side thereof .and. saidofisetsection of. said casing forming a chamber. communicatingwith. the interior of saiddischarge section through said inlet opening, said oifset section of said casing consisting of a curved wall member and closure members, one at either side of said wall member, one of said clcsure members being formed with a liquid ingress opening therein, said curved wall member extending from one end to the other of the inlet opening in the discharge section of the casing, one end portion of said Wall member being a gate portion of approximately circular curvature, said Wall member, in continuation of the gate portion thereof, being of progressively decreasing curvature and adjoined at its terminal portion with the discharge section of the casing tangentially thereof, a rotary impeller Within said chamber of the ofiset section of the casing, said impeller ineluding a circular body plate of peripheral curvature similar to the curvature of the gate portion of the wall member of said offset section of the casing, blades edgewise joined with the peripheral portion of said body plate at the side thereof adjacent the closure member having said liquid ingress opening therein, a ring-plate carried by said blades at the edges thereof remote from said body plate, the opening in said ring-plate registering with said ingress opening in said closure member of said ofiset section of the casing, a drive shaft, the body plate of said impeller being mounted on said shaft, said shaft being received in the central opening in said ring-plate and in said ingress opening in said closure member provided therewith, said impeller being located to one side of the chamber in said offset section of the casing in relatively close proximity to the gate portion of the curved wall member thereof, said impeller together with the portion of said wall member of decreasing curvature defining between them a progressively widening passage of volute form leading to the inlet opening in the discharge section of the casing, said shaft being adapted to be turned to rotate the impeller in the direction of the Widening of said passage, the blades extending from the inner edge of the ring-plate, in trailing disposition, to the outer edge of said ring-plate.

5. A pump, as defined in claim 4, wherein the blades are curved convexedly in the direction of rotation of the impeller, and the leading portions of said blades are relatively sharply curved.

6. A pump, as defined in claim 4, wherein the impeller is eccentn'cally mounted on the drive shaft.

7. A pump, as defined in claim 6, wherein the blades are curved convexedly in the direction of rotation of the impeller, and the leading portions of said blades are relatively sharply curved.

No references cited.