US1678977A - Pump - Google Patents

Description

' July 31, 1928. 1,678,977 M. J. FINN PUIIP I Filed Jan. 25; 1922 3 Sheets-Sheet 1 M. J. FINN UMP I 3 Sheets-Sheet 2 Filed Jan. 25. 1922 July 31, 1928.

. 1,678,977 M. J. FINN PUMP Filed Jan. 25. 1922 3 Sheets-Sheet 3 Figure 6 is a side elevation of a UNITED STATES 1,678,977 PATENT OFFICE.

MATTHEW .T. FINN, or rrr'rsaunen; rannsnmmu.

' Pour.

Application filed'lanuary. 25,1922. Serial Re. 531,618.

My invention relates to pumps and particularly type.

My present invention-is an improvement upon the invention as disclosed and claimed in my Patent No. 1,397,273, dated November In the present structure the cas ng is d1- vided horizontally-andthe inlet and outlet are in line with each other and are placed in the lower section of the casing. The lower section of the casing is also provided with removable and adjustable means for obstructing the conduit between the lnlet' and outlet. By the arrangement shown an 1mproved pump is produced which is flexlble in operation and in which the power consumption will be substantiallyconstant regardle'ss of the head agalnst which the pump works from minimum to maximum. This pump will also deliver a volume of liquid" substantially and inversely proportional to the variation of the head against which the pump operates.

My invention will be better understood by reading the following description taken in connection with the accompanying drawings forming a part thereof, in which 0 Figure 1 is .a side elevatlonpartially -1Il section of a structure embodying my invention' Figure 2 is a vertical section on lineII-II of Figure 1;

Figure 3-is a section on line III-. 111 of Figure 2; x

Fi ure 4 is a section ofa part of the impe ler;

Figure 5 is a View similar "to Fi ure 4 with wear plates attached to the-impe er;

the impeller shown in Figure '5; an Figure. 7 is a perspective v1eW of the means used to separate the inlet from the outlet.

Referringv to the drawings, the pump is fastened to the base 1 by means f bolts 2. The casing for the pump is dlvlded into two portions 3 and 4. The portions 3 and 4 have cooperating flanges-5 and 6, respectively, which are held together by bolts 7 The'por-tion 3 of the casing 1s prov1ded with extensions 8 and 9, as shown in Figure 2, inwhich are placed bearings 10 and 11 for supporting the shaft 13 to'which the 1mpeller 14 is keyed. The bearings are of a' n suitable construction.- and are prov ded wit to pumps of the rotary or centrifugal win the impeller rotates.

. ing 28, which the usual oil rings 15. The casing is rovided with screw-threaded portions 16 into which are screwed the members 17 which .surround the shaft 13 and act to com ress the packing 18 which surrounds the s eeve 19 keyed to the shaft 13, as ure 3.

The packing 18 is composed of the rings 20 of packing material'between which are placed the metallic members 21, having channels 22 therein. Channels 23 connect channels 22 with the upper and lower ortions of the chamber in which the impe ler "operates. By the arrangement of these channels the hydraulic pressure on the shaft due to sealing liquid is balanced andthe water or other liquid being pumped acts to seal the space around the shaft and 7 revent the cut of air into the impeller c amber.

As seen from the drawings, the impeller is circular in shape and is provided on its periphery with yanes 24. The impeller is also provided withlateral Wings 25. The s 25 are provided with notches 26, the note es being in line with the spaces be-' tweenthe vanes as best shown in Figures 3 and 6. The portions 3'and 4 of the casing are provided with cooperating conduit sections, which when the portions of the casing shown in Figare in place register so as to form a conduit having a generally circular shape in which Thewidth of the conduit is such as to receive the impeller so that the wings 25 on the im eller come in juxtaposition-to the side wa s of the conduit, thus leaving sufiicient clearance between the win s and the sides of the conduit to permit of g The lowerportion of the casing is provided with an inlet opening 27 and an outlet openis in line with the inlet. I have found that the best results are secured by makingthe taper of the sides or walls of the inlet and outlet from about 3 to 6 from the center line thereof. The preferred slope ree rotation'of the impeller.

is about 4 The inlet and outlet ,are sep- 4 arated by a member 29, which may be removable and adjustable, as shown in Figure 3, or may be integral with the casing of the machine. This member 29 is placed in a recess in the portion3 of the casing and is held in place by countersunk bolts 30. The

member '29 hasupstanding flanges 31, thus leaving a space therebetween through which the vanes on the impeller 'ass. The flanges 31 are arranged so that t ey closely fitthe edges of the vanes, as shown in Figure 2,

a from the inlet around t e circumference of and the depth of the space between the flanges is such as to closely fit the outer ends of the vanes. By this arrangement the conduit is obstructed between the inlet and outlet so that the fluid bein pumped must "pass the conduit and out at the outlet. This enables the impeller to raise the pressure of the fluid and transmit the same.

"If the pump is used to handle sandy or gritty fluid, it might happen that the edges of the wings 25 would become slightly worn. Such wear' would produce a space between the edges of the wings and the casing through which the liquid would pass and as a result. of which the original pressure generated by. the pump would decrease. In such event. the wear plates 32 may be applied to the wings, as shown in Figures 5 and -6. That is to say, the portion 33 is forced underneath the wings, thus leaving a thinportion Men the edges of the wings. The thicknessof the portion 34: may beany desired amount and the. wear plates are applied to the impeller in much the same manner that the lid is applied to a can. and the wear plates are held in place by friction between the portions 33 and the lower sides of the wings. a

After the pump has been in operation for some time on sandy or gritty fluid, the imz-peller or the member 29 may become worn so as to allow an undesirable leakage between the inlet and outlet. In order that this ditflculty may be overcome, I have provided means whereby the member 29 may be adjusted radially with respect tothe impeller. The means shown comprlse shims 35 placed below the member 29 in the depression in which that member rests. By adding a shim of the required thickness the member 29 is brought into proper relation with the impeller.

From the foregoing description the operation of my device will be understood without a detail description thereof.

My invention has many advantages in addition to the advantages set forth in my above referred to, in that separate for; simple means are rovided'whereb'y the wear between the impe er and the partition 29 may-be compensated for; the casing is divided horizontally and the inlet and outlet are in l' e with each' other as a result "of which agreater pressure is developed because the liquid is under the influence of the impeller for a greater arc of its rotation;

'means are provided for balancing the hydraulic pressure on the shaft and for acting as a water seal to prevent the entry of air into the working chamber.

While I have shown and described in detail one embodiment of my invention, I desire it to be understood that I am not to be limited to the exact details shown and described, as many changes may be made without departing from the spirit of my invention.

I claim: I

1. A pump, comprising an impeller having vanes on the periphery thereof, means extending laterally from each side of said impeller near the base of said vanes for throwing the fluid outwardly, a shaft for the impeller, a casing having achamber in which said impeller rotates and .being divided horizontally along a plane passing through the shaft, said casing being providmeans whereby said separating means may be adjusted radially towards and from said impeller.

2. A pump, comprising an impeller having vanes on the periphery thereof,,wings extending laterally from each side of said impeller near the base of said. vanes for throwing the fluid outwardly, a shaft for the impeller, a casing having a chamber in which said impeller rotates and being divided horizontally along a plane passing through the'shaft, said casing being .pro-

vided with an inlet to and an outlet from I said chamber, said inlet and outlet being in line with each'other, means separating said inlet from said outlet and free fromcontact with the impeller and having a channel through'which said vanes move, said casing being in close proximity to the edges of said laterally extending wings to form a substantially closed channel enclosing said vanes, means whereby said separating'means may be adjusted radially towards and from said impeller, and means whereby the win s of the impeller may be adjusted latera y towards and from the side walls of the pump casing and radially towards and, from the separatmg" means. In testimony whereof I have hereunto set my hand.

I -MATTHEW J. man.

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