US1948366A - Self-priming pump construction - Google Patents

Description

Patented Fe b. 20, 1934 I n: sTArris PATENT OFFICE I I SELF-PRIMING Zm CONSTRUCnON Richard G. Barzen, Kansas City, Mo.

Application May 24, 1930. Serial No. 455,238

1 Claim. (01. 103-113) This invention has relation to pumping appa- The pump discharges through an outlet 24 (see ratus, and my primary object isto devise an im- Figures 1 and 2) into the lower reduced portion proved pump construction of the centrifugal of the housing compartment 16, the upper larger action type in which is incorporateda simple and portion of which compartment is provided with eflicient self-priming means for starting the vaca curved or angular baiile element 14' formed as so uum action of the pump. a projection from the lower upright portion of Accordingly, my invention comprises an imthe partition 14, the upper portion of said element proved self -contained construction in which thebeing bent or curved in the direction of the upper primer feature is substantially built in as a uniportion of said partition which is provided with tarypart of the pump and possesses various ada port 25 affording Communication between the 65 vantages in the way of utility and efliclency over upper portions of the compartments and 16. pump priming apparatus commonly constructed. A port 26 is also provided in the web or parti- It is also sought to provide aunitary construction 18 as a communicating-passage between the tion in which the primer operation may be carpump chamber 6 and the upper portion of the 15 ried out either automatically or by means of an outlet compartment 16.

- auxiliary hand-operated pumping device form- At the top of the housing portion of the main ing part of the equipment. casting member 5 is also mounted a conventional Having the foregoing general objects in view, typ of h d p p 28 r use a required, Wh the invention will now be described by reference desired 13 S pp the automatic Priming czo to the accompanying drawing illustrating one .tion of the pump. -75 practical form of embodiment thereof, after In the operation of the pump, a supply of wate which the novel features and combinations conis maintained in the chambers thereof as repr 'sidered patentable will be set forth and claimed. Sent d in Fi e n in the Pump action, In the drawinga circulation of this water (with any air contained as Figure 1 is an elevation illustrating a pumping therein) is produced, from the pump chamber 6, 0

device constructedin accordance with the invenout through the passage 24 into the compartment tion, one face of the pump housing being re- 16 and then back to the pump chamber by way moved; of the ports and 26. Inasmuch as the pump Figure 2 is a vertical sectional elevation, lookaction will pull air in by way of the supply or ing in the opposite direction, and representing s c i i 22 d through the compartment 15 as a section on a line 2-2 of Figure 3; and such air will be entrained in the liquid, and dis- Figures 3 and 4 are horizontal and vertical seccharged in the Compartment 16 and released tions taken on lines 3--3 and 4-4 respectively, by the successive pockets of water discharged of Figure 2. therethrough. The released air will tend to es- Referring to the drawing in detail, the apparacape by the discharge pipe conduit 17, as facili- 90 tus is illustrated as comprising a main casting 5, tated by the curve of the bailie element 14, which in one face of which is formed a volute pumping also serves as a shield between this discharge chamber 6 over which is secured by bolts '7 a face current and thepor The Water lin down r or cover plate 8 provided with a stufilng box 9 for from this combined air and water current, finds the shaft 10 of the'rotor or impeller member 12, its way through the port 26, back into the pump 5 as shown in Figure 4. The opposite face of the chamber 6, and is once againcirculated, and is casting member 5 is formed as a two-com'partrecirculated until the air is completely exhausted ment housing divided by a partition 14 into a from the suction line; after this takes place, the. suction or receiving compartment 15 and an outflow through the opening '26 will be reversed, said let or discharge compartment 16, at the top of port thereafter acting simply as a discharge port, 100

which is connected the discharge conduit 1'7. A so that no loss in pump-discharging capacity is web or partition 18 separates compartments 15 suffered by any further recirculation of the water and lfifrom the pump chamber 6, which commupriming supply through this port. nicates with the compartment 1 5]by way of the It is apparent therefore that a compact and opening 20 concentric with the pump chamber as self-contained construction is provided in which 5 represented in Figure 1, and located at the bottom the self-priming structure is formed substantially ofthe larger portion of the chamber 15, as repas an integral part of the pump itself; and that resented in Figures 2 and 4. The pump supply not only is an efllcient priming action produced or receiving line 22 is connected with the top of so long as the necessity for the priming function the chamber, 15; as illustrated in Figures 3 and 4. exists, but when the air is exhausted from the suction line, the port 26 reverses its function from that of a return passage to that of a discharge passage, thereby preserving the full capacity of the pumpfor its normal pumping function. The structure of the baffle 14' in the chamber 16 is designed to facilitate the separating action between the water and the air, and incidentally helps to shield the port 25 from any disturbing action of the current discharging into the outlet 17, and is also beneficial as a shield to this zone at times when an auxiliary air pump is in use. a

The function of the opening 25 is primarily to break the vacuum on stopping the pumping operation, and prevent all the water from being completely siphoned out of the pump chambers; thus a sufficient amount of water for the primary operation is trapped and maintained in the pump chambers at all times. It is this water of course which seals the discharge line during the primary operation, by preventing the leakage of air back from the discharge line 17 into the vacuum or suction line 22. The size of the port 25 need not be large enough to constitute any appreciable leak or loss in the pumping capacity after the pump is primed.

The construction is also of a design well adapted for the ,mounting of any suitable type of positive displacement air pump, such as a handpump 28, in efiicient operative relationship to the primary pump structure, as an accessory for either reinforcing the self-priming function or as a substitute therefor under some circumstances.

It will thus be seen that a simple and compact construction of practical and efficient design is thereby provided for carrying out the aforesaid objects of the invention, and while the form of construction illustrated and described is deemed that best suited to the purpose in View, it is desired to expressly reserve the right to make such changes or modifications as may fairly fall within the scope of the appended claim.

Having described the invention, what I claim and desire to secure by Letters Patent is:

A self-priming pump construction comprising a pump casing providing an impeller chamber and a housing provided with an irregular baffle partition dividing the housing into a receiving compartment having an enlarged lower portion in communication with the impeller chamber intake and a discharge compartment having a reduced lower portion in communication with the pump discharge, means providing a combined recirculating and direct pump discharge passageway between the upper portion of said discharge compartment and the periphery of the impeller chamber, and a baffle member projecting from said partition in position to shield said passageway from the main discharge current from the pump.

RICHARD G. BARZEN.

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