US2578798A - Liquid pump - Google Patents

Description

R. E. GORDINIER Dec. 18, 1951 LIQUID PUMP Filed May 12, 1948 "Win ll IN V EN TOR. B Y?ALPH E. GOA DIN/ R u QM AGENT Patented Dec. 18, 1951 2,578,798 j LIQUID PUMP Ralph E. Gordinier, Climax, Mich., assignor to Economy Faucet Company, Newark, N. J., a corporation of New Jersey Application May 12, 1948, Serial No. 26,491

This invention relates to improvements in liquid pumps and particularly to the type of pumps which derive their pumping action from disc-like impellers gyrating within a cylindrical enclosure. A single impeller may sufiice for the requirements or, to give greater pumping capacity and more uniform pressure cycles, a plurality of impellers may be arranged within the pumping compartment having a common liquid intake and discharge.

A pump of this class is shown and described in my copending application, Serial Number 751,595 filed May 31, 1947, of which this application is a continuation-in-part, and the present application is directed to improved driving elements which may be incorporated in the pump of that application.

Accordingly, it is an important object of my present invention to provide an improved drive for the gyrating impeller of a liquid pump. A further object of the invention is to provide, in the pump drive, an improved combination of elements by which an impeller is actuated within the pump housing. A still further object of this invention is to provide an improved pump impeller which is suitable for use with a pump of the above described class.

Other and important objects and advantages of my invention will be apparent throughout the following description taken in conjunction with the annexed drawing showing a preferred physical embodiment of my invention. It will be understood that various changes may be made in the shape, size, and material of the component parts of the pump within the scope of the invention as particularly pointed out in the subjoined claims.

In the drawing,

Figure 1 is a longitudinal elevation view of a liquid pump incorporating features of my invention, with the central portion of the pump housing in cross-section,

Figure 2 is a cross-section view taken through the left impeller of Figure 1 on line 2--2 of Figure 1, showing portions of the pump housing in phantom,

Figure 3 is a cross-section view through the 4 Claims. (Cl. 103132) pump shaft at the side of an impeller, taken on of a deformable gasket 8 of circular cross-section retained in alined peripheral grooves 9. The housing is internally separated by the deformable divider seal 32 faced with compression plates 3i to form two separate pumping compartments in which are located a pair of pump impellers ll operable to create suction and discharge by a gyratory motion of translation within their respective compartments. Pumps of this kind are known in the art and are particularly advantageous for pumping liquids in which gritty solids are suspended, the impeller having a combined sliding and rolling contact with the internal compartment walls tendin to carry solids through the pump without mechanical interference.

Impellers l l are engaged by eccentrics l4, free to rotate therein as will more clearly be understood during further description of the pump drive, the eccentrics being, in turn, rotated with the pump shaft l3 which is trunnioned in suitable anti-friction bearings l2 fixed within the housing sections. Shaft end closure is effected on the right hand end by a knurled threaded cap 20 to seal off any leakage which may occur between the shaft and its bearing. Likewise, in the left hand housing section, a liquid seal is maintained by a suitable packing gland, not shown, which is retained Within the knurled nut 22 through which shaft It extends to be driven from an electric motor or other prime mover. Fluid connections for the pump to a supply line and discharge line are provided for as by the pipe nipples threaded in the housing which communicate with intake and discharge ports located within the housing compartments. An example of one such connection is the nipple 27. The internal construction of the housing compartments will be more clearly understood by reference to my aforementioned application, Serial Number 751,595.

Referring to Figures 2 and 3, the eccentric members l4 are cylindrical in form and are rectangularly slotted as at 5!] to a depth substantially equal to the diameter of shaft l3 with a width equivalent to the perpendicular distance between flats 5| on the shaft, these slots being so constructed to engage over flats 5i with the diametrical center of the shaft and the eccentrics displaced from each other. On the upper dead center, as is shown in Figure 2, this displacement is half of the throw of the eccentric with the eccentric center located above the shaft center and likewise, on lower dead center, as in Figure 3, the situation is the reverse, with the eccentric center located below the shaft center.

A sliding fit is maintained between the peripheral surfaces of eccentrics I4 and the bore of impellers II so that, as shaft I3 is turned, the impellers will gyrate within their respective compartments to continuously open and close the crescent-shaped space between the impeller and the inner-compartment surface and carry fluid through the pump. Impellers I I "are restrained against turning with the eccentrics by engagement of their projecting ends with the inner compartment walls, as shown in phantom in Figure 2. Confined eccentric operation of impellers I I without lost motion is ensured by arranging the depth of slot 50 so that shaft I3 will fit therein tangent to the short wall of the slot and tangent, with operating clearance, to the bore .of impeller II. In this manner the cooperativeengagement of shaft I3, the eccentric I4 and the impeller I I precludes the necessity for using set screws, keys, or other securing means .to fasten the eccentric to the shaft, or for forming theeccentricin'te'gral with the shaft, andfurthermore, this construction makes for simpler manual emgongw ing assembly and disassembly of the ump.

The impellers of my in'vention'rare'of three piece construction, shown on'a reduced'scale in Figure 4, consisting of a formed strip metal core 52, see also Figure 2, and a pair of'identi'cal inating casings 53 of rubber, neoprene, or other plastic substance, having formed channels toaccommodate and completely envelop core 52. Deformable materials are specified for casings 53 'as such material will maintain a tight hermetic seal with the inner metal walls oi the pumping compartments, irrespective of expansion orcontraetion due to temperature changes and, at the same i e, they win deform in accorda c w t so d which may enter the housing and which; may otherwise tend to deleteriously scratch or damage the inner compartment surfaces. At the same time, the rigid core 52 will support the deformable impeller material against distortion of, form which would reduce theefiiciency of .the pump.

The operation of a pump which includesrthe improvements of the present applicationfollows that of like pumps known in the'art; theimportant advantages residing in improved driving elements which may be readily. manufactured,.serviced, and-assembled witha liquid pump. The

ply of liquid which will be discharged on the subsequent pump shaft revolution.

I claim:

1. An impeller for a liquid pump drive including, in combination, a rigid, metallic core; said core including a substantially cylindrical, continuous ring portion conforming with the shape of the impellenand a pair of identical mated half-casings covering said core, said half-casings being constructed of non-metallic material having difierent physical properties than the core.

2. An impeller for a liquid pump drive including, in combination, a rigid, metallic core; said core including a substantially cylindrical, continuous ring portion conforming with the shape of the impeller, and a pair of identical mated half-casings covering said core, said half-casings being constructed of non-metallic deformable material.

3. An impeller for a liquid pump drive including, in combination, a rigid, metallic core; said core including a substantially cylindrical, continuous ring portion conforming with the shape of the impeller, and a pair of identical mated half-casings covering said core, said half-casings being constructed of non-metallic deformable material with channels to completely envelop said core.

4. An impeller for a gyratory liquid pump drive comprising, in combination, a rigid metallic core; said core including a substantially cylindrical ring portion conforming with the shape of the impeller and a radially projecting portion at the location of a port divider; and a resilient, deformable covering concentrically shrouding all surfaces of the metallic core and forming internal, external, and endwise non-metallic bearing surfaces adapted for sliding contact with metallic pump surfaces.

RALPH E. GORDINIER.

REFERENCES CITED The following references are of record in the file of this patent! UNITED STATES PATENTS Number Name Date 1,501,596 Guttner July 15, 1924 2,246,487 Fraser June 17, 1941 2,351,050 Karey June 13, 1944 2,380,283 Van Ranst July 10, 1945 FOREIGN PATENTS Number Country Date 8,606 Great Britain 1891

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