US2247335A - Pump - Google Patents

Description

June 24, 1941 H. NEIBERT 2,247,553

PUMP

Filed Jan. 5, 1939 2 Sheets-Sheet 1 INVENTOR HAROLD NEIBERT H. NEIBERT June 24, W41.

PUMP 1 Filed Jan. 5, 1939 2 Sheets-Sheet 2 INVENTOR HAROLD NEIBERT Patented June 24, 1941 Harold Nether-t, Davenport, Iowa, assignor to Micro-Weston, inn, hettcndori, lowa, a corporaflon oi Delaware application rascals, not, Serial no than iii This invention relates to improvements in pumps of the type havim a rotary impeller with peripheral hucketa which engage the liquid to be pumped in a promo-developing channel.-

- More specifically, it relatm to improvements in pumps of this characterwherein the pre minedeveloping channel is formed by apalr of annular rings, which may he removed and replaced when it is desired to alterthe performance or capacity of the pump, or which may he removed for any purpose.

After o. period oi operation of these liquid pumps the removable rings frequently stick tightly in the housing and it is very dimcult. to edect their removah It is, therefore, an object oi this invention to provide liquid pumps wherein the annular rings which cooperatively form the pressure-developing channel may be easily removed from the pump housing afterthe pump has heen in operation tor a considerable period. Other objects will heoome apparent from the following detailed description oi suitable embodiments oi the invention i t 1' in connection with the accompanying drawings. in which Figure l is an end elevation, partly in section,

ot a rotary impeller type pump embodying this a invention;

Fig. '2 is a partial section of the pump on the line 2-2 of Fig. l:

"Fig. 3 is an end elevation of the housing of the pump illustrated in Fig. l with thecover plate removed:

' Fig. 4 is an enlarged fragmentary sectional view showing a method for locking the annular pressure channel defining rings in the housing;

Fig. 5 is an end elevation, partly in section.

of a rotary impeller type pump embodying a modification of my invention:

Fig. 6 is an end elevation, partly in section, oi

one of the annular rings:

Fig. '1 is an end elevation, partly in sectioiuoi another annular ring which cooperates with that shown in Fig. 6;

v Fig. 8 is a side elevation oi the ring shown in Fig. 6, looking in the direction oi the arrows il-dof Fig. 6; v v

- Fig, 9 is a side elevation of the ring shown in Fig. 7,. looking in the direction of the arrows 9-4 in Fig. 7. Reierring more particularly to the drawings, in which like parts are identified by like numits peripheral edge. a set of buckets is shown asiormcd on each side oi the rotor or impeller i and separated by a oircumierentially extending web t. The individual buckets in each set are separated from one another by the radial wehs t.

The impeller is secured on a shaft t and is disposed in the pump chamber t, which is iormed hy the pump housing or casing i and a cover it. it is driven by a motor, not shown, and the shaft is preferably carried in journals eirterna'lly oi the chamber t.

the annular rings ii and it are received in the pump chamber t and cooperatively define a pressure developing channel i i which surrounds the peripheral edge oi the impeller, so that the buckets move through the channel as the inipeller rotates. The channel is substantially annular and h provided with an inlet it and an outlet it. -'ifhe inlet communicates with an intake passage it formed in a boss iii of the housing i, and the outlet cmunicates with the outlet passage i t in'the hoes it: also in the cas log t and adjacent the hoes iii. Each of the bosses ill and it is suitably threaded to receive the intake and discharge pipes it and it, respectivelv.

Between the inlet iii and the outlet it the rings t and it closely surround the impeller edge, so that, during the operation of the pump, liquid flowing through the pressure developing channel is directed through the outlet it. This closely fitting part of the rings is referred to as the stop and is indicated by the numeral it.

Radially inward from the channel it, the rings 9 and it are formed with annular sealing ribs ti and ttfrespectively, which have a running ht with the impeller i and'prevent radial how of the liquid into and out of the channel it from the center of the pump chamber t. The rings a and it have circumferential ribs it and it, respectively, which meet at the parting line as and cooperatively form the pressure developing erals of reference throughout the several views.

the pump comprises a rotary impeller i, usually of relatively flat, disklike'form, andprovided with a plurality of marginal buckets 2, formed near channel. The ribs 2t and it, of course, do not extend across the inlet it and the outlet it,

thereby permitting the ingress and egress oi the liquid to and from the channel ii. In the region of the stop 2'0 the portion lit oi the rib 24 crtends to a position closely adjacent the periphcry of the impeller i and has a running fit therewith to cooperate with the stop 20 and the portion 21 of the rib 23 in directing liquid through the outlet it. In the vicinity of the outlet. i2 and the inlet it, the rings 9 and It make good contact with the pump'housing i. To insure against leakage the external peripheries of the rings 9 and I'll may be coated with paint, or other sealing material, when the pump is being assembled. 7

On account of hardening of the paint, corrosion, etc., these rings frequently stick in the pump housing, so that it is very diflicult to re- According to this invention themove them.

rings 9 and I are forced tightly against the region or contact area 28, forming a seal between casing may very tightly adhere, due to hardenthe inlet l3 and the outlet l2 from the pump chamber 6. The rings 9 and in are fonced against the contact area 28 by suitable clamping.

means, which may be the set screws 29 and 30;

The region or area 28 may extend beyond the region of the stop, but should not cover more than one-half of the internal periphery of the housing 1. The extent of the region or contact area is determined by the extent of the 'relieved portion 32 of the housing 1 and need not extend angularly more than the distance to eflectja accuse ing of the paint or other sealing means originalby applied, as well as the collection of sediment and corrosioninthis region.

good seal, which generally is a slight distance beyond the inlet and outlet port areas.

Consequently, when rings 9 and It with circular peripheriesare used the casing should be relieved around an inner circumference up to the point where it is desired to maintain contact between the rings and easing.

In Figs. 8 and 9 'a'modiflcation of the invention is shown in which rings 9' and Ill -are formed with relieved portions 34 and 35, and portions 3|, which contact with the inner face 28 01' the casing section to form the sealed region or portion.

The rings 9 and Ill preferably carry an aligning means, such as a V-groove 33, adapted to receive the movable clamping means 29 and 38, so that the inlet 13 and the outlet l2 will always be assembled adjacent 'the' inlet and outlet pasvent binding between the impeller l and the housing 1 when the ring 9 is moved radially away from the contact surface, the portion 21 of the rib 23 is made so that it cannot come in contact with the impeller upon the slight radial motion. This may be accomplished by making the portion 21, or, if desired, all of rib 23, so that it does'not out interierenceoccurring between the impeller and the portion 21. The impeller is next removed and, after loosening the clamping screw 30, the ring lil'may then be removed laterally from the bearing surface and withdrawn from the housing 1. The depth of the relieved-portions of the 110118- ing or rings, as the case may he, should preferably be sufllciently'large to enable sediment or corrosion to be removed from between the annular rings and the housing. However, distances Various modifications oi. the invention, which readily occur from a study of the foregoing disclosure and the illustrations in the drawings, are

contemplated and intended to be included with in the scope of the appended claims.

What I claim is]: 1. In a-rotary pump traits-smears. a as ing, annular rings disposedjn the casing and having portions .whichcooperatively define a pressure developingchannel, an impeller having. marginal bucketsmounted for rotationthrough the channel, an inlet and outlet to the .chan-' nel through the rings and casing, an area of con-. tact for portions of the rings and the casing sur-. rounding the inlet and outlet, said area'extende.

ing over not more than half the internal. peripher'y'of the casing, means for securely holding the rings and easing together throughout the contact area, and means for releasing the holding. means.

2. In a rotary lar rings disposed in the casing and having portions which cooperatively define a pressure developing channel, an impeller having marginal 1 buckets mounted ior rotation through said channel, an inlet and anoutlet for said channel through the rings, and easing. stop meansdisposed between the inlet and the outlet and close?- is fitting the impeller to aid in directing liquid through the outlet,vsaid stop means including portions which fit closely adjacent the periphery of the impeller, said portions being carried by the ring which is normally last removed on disassembly of the pump to providevfacile removal of said rings without danger or injuryto the impeller. an area oicontact for the rings and the casing surrounding the inlet and the outlet to provide aseal, said area ofcontact extending over not more than half the internal periphery suns, casing, means for holdingthe rings and the casing securely together throughout the contact area, and means vior releasing ,the holding means.

3. In a rotary pump. a casing, removable annular rings disposed in the casing and having portions which cooperatively deflne a.pressure developing channel, an impellermountedfor r0:- tation through said channel, anoutletj iromthe channel through the rings andthefcasing, an

' areaof contact-tor portions oi the, and case mg surrounding the outlet to providean efl'ective seal for the outlet, said areaextendingz over less than hall the internal. Periphery of the casing to permit tacile removal or the rings, means ior securely holding the. rings and sin together throughout the contact area, and torreleasing-the oilthe turbine type, annu-l

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