US 2195902 A
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April 2, 1940. A. R. PEZZILLO FLUID IIPELLING 0R IMPELLED DEVICE Filed July 26, 1939 I v I INVENTOR pwa w ATTORN EYS Patented Apr. 2, 1940 UNITED STATES PATENT orrlcr.
FLUID IMPELLING R IMPELLED DEVICE Albert R. Pezzillo, Philadelphia, Pa.
Application July 26, 1939, Serial No. 286,593
7 Claims. (Cl. 103-90) One of the main objects of my present invenhas one or more portions of its blade mounted tion is to devise a novel construction and arto have a working fit in stationary portions at the rangement of a fluid impellingor-impelled deintake or discharge ends, or at both intake and vice, which, if desired, can be connected directly discharge ends of the housing with provision for 7, into a pipe line to form a part thereof and an a high starting torque on the motor so that the axial line of flow, and which may operate as a fluid can be initially impelled under a head presfluid t I sure and a continuous flow of the fluid main- The fact that my pump must start against a tained. head, and that during idle periods there may Other novel features of construction and ad- 10 be an accumulation of sediment or any other vantage will hereinafter more clearly appear in in foreign matter that may cause a seizure-it is. the detailed description and the appended claims. advisable to use a motor of high starting torque. For the purpose of illustrating the invention,
A motor of high starting torque would mean I have shown in the accompany ng drawing typa single or split phase type. In a motor of this ical embodiments of it, which, in practice, will type, it is necessary, in order to obtain high g ve a sfactory and reliable results. It iS, 16 starting torque, to use a centrifugal starting ever, to be understood that the various instruswitch. It is impractical to use a centrifugal mentalities of which my invention consists can starting switch in my device as it would, in my be variously arranged and organized and my application, b in th fluid, invention is not limited to the exact arrangement 00 By using an electrical starting relay, which is and organization of these instrumentalities as 20 installed and operates exterior of my'device, I herein set forth.
have been able to eliminate the centrifugal start- Figure 1 is a sectional elevation of a fluid iming switch heretofore deemed necessary, and still pelling or impelled device, embodying my invenuse a split phase type of motor, and have a high tion.
23 starting t r u Figure 2 is an end elevation partly broken away 25 A further object of the invention is to devise of Figure l. a novel housing with a novel construction and Figure 3 is a side elevation partly in section, arrangement of stator windings and rotor, and of another embodiment of my invention. novel means having high electrical resistance, to Figure 4 is a sectional view, the sec on being no isolate the stator windings from the fluid and taken substantially on line 5-4 of Figure 1. 0 dampen any electrical interference or hum and Similar numerals indicate corresponding parts. in such a manner as to act as a sound deadener. Referring to the drawing:
A further object of the invention is to introl designates the housing or casing consisting duce into the fluid passing through the pipe of end members 2 and 3, recessed to receive a line, other fluid which passes through the tubular shell 4, the parts being secured in assembled 35 shaft of the rotor. position by rods 5.
A further object of the invention is to extend The end members 2 and 3 have integral with the intake end, or delivery end or both ends of them the spiders 6 provided with hubs 'i' which the rotor blade into a stationary casing portion have self lubricated bearings B, such as for exwhere it will have a working fit so that, in the ample graphite bearings, 40 case of a fluid pu p, the initial -of the fluid a 'A tubular or hollow rotor 9 has as seen in Figcan be started and mainta ned a t a e ure 1, a conical bore II] which increases in diamplessure 0f the fluid. and if d s ed, compressed eter towards the outletend. An impeller H in before de y to the p p line at t e del very end the form of a helical blade has the outer periphof the pump. cry of its blade fixed in any desired manner, for 45 A further object of the invention is to so conexample by welding to the inner wall of the bore struct and arrange the bearings that they are of the rotor, and is also fixed to a shaft l2, preflubricated by fluid and are elongated to ensure erably tubular, and mounted in the bearings 8 long life without inspection or repair. in axial alignment with a pipe line I3. The im- 5( With the above and other objects in view as peller blade at the fluid intake end has a portion will hereinafter more clearly appear, my inven- M .of substantially uniform diameter which extion comprehends a novel fluid impelling or imtends with close tolerance into the cylindrical pelled device. bore I5 of a cylinder l6 extending inwardly from It further comprehends a novel fluid impeller, the end housing member 2. wherein an impeller carried by a tubular rotor The end housing member 3 also has an in- 5 wardly extending cylindrical portion l1, and if desired, the impeller blade II has a desired number of turns l8 of substantially uniform diameter extending into said portion II.
The outer chamber of the housing which contains the stator windings I9 is sealed from the fluid in the rotor by a cylinder 20, opposite ends of which are sealed by gaskets 2| connected with the end housing members.
Flanged pipe fittings 22 secured in any desired fluid tight manner to the end housing members are connected in the pipe line l3.
It will be understood that the sealing cylinder 2!! has a high electrical resistance and isolates the stator windings from the rotor and the fluid passing therethrough. It is form of a material which will act as a sound deadener and which will reduce to a minimum, any hum that might occur with an A, C. current if such current is used.
The motor is provided with a relay 23 and with an overhead cutout 24 of any conventional types.
In order to make provision for mixing or commingling different types of fluids, the tubular rotor shaft l2 may be connected by a pressure packed slip coupling 25 with a pipe 26 leading from a source of fluid supply separate from that of the pipe line [3, and preferably provided with a check valve 21.
If my device is to be used as a flow meter, the supply current would be considerably reduced and the input wires connected to an ammeter, properly calibrated, so that, when fluid is forced through the rotor, the latter will revolve and the current will indicate on the ammeter the volume and rate of flow. The pressure created by the impeller at its discharge end causes a Venturi action at the discharge end of the tubular shaft, entraining fluid through the hollow shaft to mix with the fluid being pumped. When the pump stops the check valve 21 prevents reverse flow through the hollow shaft. The helical impeller blade has an extension of the blade extending into a stationary bore at one or both ends of the blade a substantial distance. This distance is determined by. the pitch of the blade, or the use of a straight helical blade, or of a diverging blade, and the pressure which it is desired to create.
In numerous experiments which I have made I have found that if the blade diverges within the rotor, the extension of the blade into the stationary bore can be of less length than if a helical blade is used which is of uniform diameter throughout its length.
In the form shown in Figure 3, the construction is the same as that of Figure 1, except that the rotor instead of having a conical bore has a straight bore 28, and the portion 29 of the impeller blade within the rotor is of substantially uniform diameter.
If thebore of the rotor increases from its intake end toits discharge end, with the portion of the impeller blade within the rotor correspondingly increasing in diameter, a greater pressure is created on the fluid being impelled with increased efdciency over a blade of uniform diameter.
The stationary bore for the discharge end of the impeller blade, in many cases, is not necessary. When employed, it provides an increased pressure on the fluid,
If it is desired to operate my device as a flow meter, the impelling blade is driven by the fluid passing through the device. This causes the blade to revolve in a reverse direction from that in which it operated as a pump. The electrical resistance builds up, which can be calibrated and indicated on a meter.
Having thus described my invention, what I claim as new and desire to secure by Letters Patents is:
1. In a fluid impelling or impelled device, a housing having a fluid inlet and a fluid outlet and a stationary bore at its intake end, a tubular rotor in the housing, and a helical blade fixed in the rotor and having at its intake end a helical extension of the blade projecting into said stationary bore a substantial distance and having a working fit therein.
2. In a fluid impelling or impelled device, a housing having a a fluid inlet, a fluid outlet and a stationary bore at its intake end, a tubular rotor in the housing and a helical blade fixed within the rotor and diverging in the direction of flow and having at its intake end a helical extension of the blade projecting into said stationary bore a substantial distance and having a working fit therein. I
3. In a fluid impelling or impelled device, a housing having an inlet, an outlet, a stationary bore at the inlet and a stationary bore at the outlet, a tubular rotor within the housing, and a helical blade fixed within the rotor and having extensions of the blade projecting into said stationary bores a substantial distance and having a working fit therein and shaped to create a desired pressure on the fluid being pumped.
4. In a fluid impelling or impelled device, a housing having an inlet, an outlet and a stationary bore at the outlet end, a tubular rotor in the housing, and a helical blade within the rotor and having an extension of the blade projecting into said stationary bore a substantial distance and having a working fit therein and shaped to create a desired pressure on the fluid pumped.
5. In a fluid impelling or impelled device, a housing co'nprising end members forming an inlet and an outlet, and a cylinder between said end members and sealed therewith, said end member at the intake end having a stationary bore, a tubular rotor in the housing, and a helical blade fixed in the rotor and having an extension of the blade projecting into said stationary bore a substantial distance and having a working fit therein and shaped to create a desired pressure on the fluid pumped.
6. In a fluid impelling or impelled device, a housing comprising end members forming an inlet and an outlet, and a casing sealed between said members, said members forming spiders with bearing receiving hubs, bearings in said hubs, the end members at the intake end having a stationary bore, a tubular rotor within the housing, a helical blade fixed within the rotor and hav.ng an extension of the blade projecting into said bore a substantial distance and having a working fit therein and shaped to create a desired pressure on the fluid pumped, and a shaft fixed to said blade and mounted in said bearings.
7. In a fluid impelling or impelled device, a housing having an inlet, an outlet and a stationary bore at its intake end, a rotor in the housing, a helical blade flxed in the housing and having an extension of the blade projecting into said stationary bore and shaped to create a desired pressure, a tubular shaft fixed to said blade and open at its discharge end to the fluid pumped, and a conduit leading from a separate source of fluid supply having a check valve, and communicating with the inlet end of said tubular shaft.
ALBERT R. PEZZILLO.