US2744465A - Screw type pump - Google Patents

Description

May 8, 1956 F. H. SPRINGER 2,744,465

SCREW TYPE PUMP Filed Nov. '7, 1952 2 Sheets-Sheet 1 May 8, 1956 F. H. SPRINGER Y SCREW TYPE PUMP 2 Sheets-Sheet 2 Filed Nov. '7, 1952 Frederic/r hf Spr/'nger INVENTOR.

SCREW TYPE PUMP Frederick H. Springer, Hale Center, Tex. v Application November 7, 1952, serial No. 319,316

y 3 Claims. (Cl. 10B-87) The present invention relates to pumps and more particularly relates to an improved portable pump construction for pumping fluids.

A primary object of the present invention is to provide a portable pump of the auger or screw conveyor type that includes a novel mounting arrangement for the ends of the pump shaft whereby one of the pump shaft bearings is adapted to be lubricated by the fluid being pumped and wherein one of the pump shaft bearings is designed to carry all of the longitudinal thrust load of the pump shaft.

A further object of the present invention is to provide a portable pump which includes its own power source and in which the pump shaft may be disconnected from such power source and run from any other suitable power means such as the power take-olf of a tractor, and wheret in the screw conveyor may be changed from either the right or left hand type in accordance with vthe power source for the same.

A still'further object ofthe invention is to provide a v portable pump that may be readily adapted for permanent installation, that is extremely sturdy in construction and durable in operation, that does not need priming and which will not fail due to changing water levels.

These, together with various ancillary objects and features arel attained by this invention, a preferred embodiment of which is shown by way of example only in the accompanying drawings, wherein:

Figure 1 is a side elevational view of the portable pump in operative position;

Figure 2 is an enlarged side elevation view of the pump cylinder in cross section taken substantially along section line 2-2 of Figure 1;

Figure 3 is an enlarged cross sectional View of the pump cylinder taken substantially along section line v3---3 ofFigure 2; v

Figure 4 is another enlarged cross sectional View of the pump cylinder taken substantially along section line 4-4 of Figure 2;

Figure 5 is an enlarged cross-sectional View of the pump cylinder taken substantially along section line 5 5,

of Figure l;

.Figure 6 is an enlarged cross sectional -view taken substantiallykalong section line 6 6 of Figure 5 showing the mounting of the pump drive shaft in the pump cylinder; and n' Figure 7 is a side elevational vview taken partly in section showing the adaptation of the pump cylinder to a permanent installation.

Referring now to the accompanying drawings in detail,

= UnitedStates Patent()v it will be noted that like reference numerals are utilized to designate similar parts throughout the various views.

Referring rst to Figure l, the portable pump constituting the present invention is designated in its entirety by the numeral 10. The pump 10 comprises a pump cylinder 12 on the upper end of which is mounted a power source, shown in the preferred embodiment as a one-cylinder gasoline engine 14 and intermediate the ends of which is mounted a Wheeled supporting assembly 16 for transporting the pump from place to place.

As shown, the wheeled supporting assembly 16 conl stitutes generally a pair of V-shaped brackets 18 secured to the outer wall of the pump cylinder intermediate the vends of the cylinder with the supporting wheels 20 journalled for rotation at the apex of each V. A tongue 22 extends from the assembly 16 whereby the assembly may be attached to a portion of the drawing vehicle, which may obviously be a tractor, truck vor similar vehicle.

Extending from the motor 14 is a drive shaft 24 on the free end of which is mounted a pulley 26. Parallel to the drive shaft 24 and journalled for rotation in the upper end of the pump cylinder 12 is a pump drive shaft 28 on thefree end of which is a second pulley 30. An endless belt 32 is entrained over the pulleysl 26 and 30 to drivingly connect the drive shaft 24 with the pump drive shaft 28.

Referring now more particularly to Figures 2-4 and 6, the interior construction of lthe pump cylinder 12 may be more clearly observed. As will be noted from these figures, the pump cylinder 12 is formed with an open bottom 34 and a closed upper end or top 36. Intermediate the ends and more closely adjacent the upper end 36, the cylinder 12 isr formed with a radially projecting outlet conduit 38 which communicates with the interior of the cylinder 12.

Axially disposed Within the cylinder 12 is the pump shaft 40 having a screw or auger type spiral conveyor 42 thereon. The free edge of the auger or screw 42 or rather the free edges of the convolutions of this member are spaced radially from the pump shaft 40 a smaller distance than the internal radius of the pump cylinder 12 so that ample clearance is provided between the cylinder wall and the conveyor. Adjacent the lower or inlet end of the pump cylinder 12, is mounted a spider 44 consisting of a hub 46 concentrically surrounding the lower end of the pump shaft 40 and having radially projecting arms 48 detachably secured thereto and extending through suitable aperturesin the lower end of the cylinder 12. The outer ends of the arms 48 are threaded to receive fasteners in the form of nuts 50 whereby the spider 44 may be securely mounted within the pump cylinder 12.

Within the hub 46 of the spider 44 is a fluted rubber b earing 51 in which the lower end of the pump. shaft 40 is rotatably journalled. With this arrangement, the Water or other lluid being pumped by the auger 42 through the n Patented May 8, 1956` 54 and the interior of the pump cylinder 12 is provided with a partition 58 spaced directly above the pump outlet 38 whereby the upper end of the chamber containing the sleeve or bushing 54 is divided into a separate chamber. A packing screw 60 has one end threaded in the bore 56 and has its other end tapering and extending through the partition 58. Intermediate its ends, the screw 60 is provided with an enlarged head or integrally formed nut 64. Threaded on the lower end 62 of the packing screw 60 is a bearing 66 which may be of bronze or othersuitable material. Each of the ends of the packing screw 60 is formed with a dish shaped recess and the corresponding mating surfaces of the bushing 54 and the bearing 66 are likewise formed with mating recesses. Packing material 68 is disposed in these recesses. The drive shaft 28, of course, extends through all of these members axially of the cylinder 12.

The lower end of the drive shaft 28 is formed with a flattened portion 70 which is disposed in a socket 72 formed in the upper end of the pump shaft 40. Set screw 74 keys the drive shaft 28 to the pump shaft 40 to assure simultaneous rotation of these members. Slots 76 formed in the upper portion of the cylinder 12 between the end plate 36 and the partition 58 constitute cooling apertures for the bushing 54.

Fixedly secured to the drive shaft 28 and disposed within the cap 52 are a pair of complementary bearing members 78 having tapered bearing surfaces thereon. Bearing sleeves 80 surround the bearing members 78 whereby a bearing race is formed between each member 78 and bearing sleeve 80. Roller bearings are disposed in the bearing races whereby the shaft is provided with double row roller bearings whereby this connection of the shaft to the cylinder absorbs all of the longitudinal thrust of the shaft 28 as well as a portion of the radial thrust therefrom. Stud bolts 82 are utilized to mount the cap 52 upon the end plate 36.

To mount the engine 14 on the pump cylinder 12, a pair of angle members 84 are provided. These angle members 84 have their inner ends formed in an arcuate shape conforming to the curvature of the cylinder 12 as at 86 and are welded or otherwise secured at these ends to the wall of the cylinder 12. As will be noted particularly in Figure 5, each pair of angle members 84 is so secured to the wall of the cylinder 12 that one leg of each member aligns with a corresponding leg of the mating member to form a horizontal at surface extending transversely on both sides of the cylinder 12. In the preferred embodiment, two sets or pairs of angle members 84 so arranged are shown spaced longitudinally along the cylinder 12. Mounted on the horizontally disposed legs of these sets of angle members 84 is a platform 88 to which the engine 14 is secured.

In Figure 7, a pump cylinder 90 is shown similar to the pump cylinder 12 but having open ends which are externally threaded as at 92. Couplings 94 are threaded on these open ends in order to secure the cylinder 90 to corresponding pipe sections if desired. In this construction, a pump shaft 96 is disposed axially within the cylinder or pipe section 90 and includes an auger or screw conveyor 98. The ends of the shaft 96 are provided with connecting sockets 108 whereby these ends may be attached either to drive shafts or auxiliary conveyor shafts if desired. Spiders 162 having hubs 104 concentrically surround the shaft 96 adjacent the ends thereof and iiuted rubber bearings 166 rotatably journal the ends of the shaft 96 within the spiders 102. By virtue of this mounting, as noted in the mounting of the lower end of thc previously described pump 10, the bearing is such that it is both lubricated and cooled by the water or other fluid being pumped through the cylinder 90.

In operation, the pump may be utilized to pump any liquid but is particularly adapted for pumping water into irrigation work out of lakes, rivers, reservoir canals,

ditches, or any other place where the inlet end can be submerged or at least partially submerged.

With further reference to Figure 7, it is to be noted that this modification is particularly suited for lifting water from deep wells by virtue of both the cylinder and auger being adapted for coupling with adjacent units of the same character. When a series of cylinders are coupled to one another with a continuous auger therethrough, high capacity discharge with a lower R. P. M. rating and/or lower horsepower per unit of water discharge is facilitated over presently used pump. Of course, the auger may be specially treated with a glass, plastic, porcelain or other protective coating to adapt the same for permanent installation.

From the foregoing description, the construction and operation of the device are believed to be readily apparent. However, since numerous modifications and changes will readily occur to those skilled in the art after a consideration of the foregoing specification taken in conjunction with the accompanying drawings, it is not desired to limit the invention to the exact construction shown and described. But all suitable modifications may be resorted to falling within the scope of the appended claims.

What is claimed as new is as follows:

l. A portable pump comprising a longitudinal pump cylinder, a wheel supporting frame on an intermediate outer surface portion of said cylinder, power means carried on said cylinder, one end of said cylinder including an end plate closing the end thereof, the other end of said cylinder being open for direct communication with fluid to be pumped, an intermediate partition element disposed in spaced relation from the end member on said cylinder defining a pump chamber with the open end of said cylinder, a fluid outlet in communication with said pump chamber, a pumpdrive-shaft extending axially into the pump cylinder between the end plate and intermediate partition element having one end portion extending into the pump chamber and the other end thereof extending exteriorly of the end plate, a pump-drive-shaft tubular bushing member circumposed on the pump-driveshaft between the end wall and partition member within said pump cylinder, air cooling aperture portions in the pump cylinder in communication with the bushing member, la bearing support assembly carried on the end plate of said pump cylinder in concentric relationship to the pump-drive-shaft, means operatively connecting the power means to the pump-driveshaft, fluid packing and support means carried on the partition element and engageable with the bushing member for preventing leakage from the pump chamber past the pump-drive-shaft, an axially extending elongated endless screw pump impeller having a tubular end portion extending over the end portion of the pump-drive-shaft extending into the pump chamber, the other end of the pump impeller having an axial shaft bushing, and a support spider contained in the pump chamber adjacent the open portion of the pump cylinder and rotatably supporting the end of the pump impeller therein.

2. A portable pump as set forth in claim 1 wherein said spider adjacent the open end of the pump cylinder includes a fluid cooled bearing assembly lubricated by the fluid being pumped by the pump impeller.

3. A portable pump as set forth in claim 1 wherein the uid packing and supoprting means on said partition element comprises a packing screw circumposed on the pump-drive-shaft and threaded into one end of the bushing member, said screw including an integral nut portion engaging the intermediate partition, said packing screw having an opposite end portion extending through the intermediate partition, a bearing member rotatably supported in the partition element and circumposed on said pump-drive-shaft and threadedly secured on the pump packing screw, said packing screw forming with the bushing member and bearing member packing recesses about the pump-drive-shaft, and packing material con- :'1 tained in said recesses.

References Cited inthe le of this patent UNITED STATES PATENTSV 738,244 Roth Sept. 8, 1903v 917,070 Holly Apr. 6, 1909 1,245,806 Sears Nov. 6, 1917 1,711,086 Dennison Apr.v 30, 1929 1,762,708 Allred June 10, 1930 1,868,533

Johnson July 26, 1932 6 Constantin June 30, 1936 Pigott Sept. 29, 1936 North Sept. 10, 1940 La Bour Oct. 17, 1944 Palm Nov. 14, 1944 Finney May 10, 1949 Dorner June 2, 1953 FOREIGN PATENTS Germany Mar. 1, 1922 France Apr. 4, 1931

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