Aid one-fifth to alphonse h
US 1623104 A
Description (OCR text may contain errors)
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RHEUEL H. FREDERICK, OF IRVINGTON., NEN JERSEY, ASSGNOR OF TWO-FEFTHS TO CHARLES F. AMES, OF BROOKLYN, NEW' YORK, AND ONE-FIFTH TO ALPHONSE H. E.
BERCHEM, OF NEVI YORK, N. Y.
Application filed .Tunel 2,
rlhis invention relates to that class of rotary impeller pumps wherein the kinetic energy of a current of water is utilized to exhaust a space or chamber containing fluids, either liquid or gaseous, lor both. or to deliver gases into a compression chamber or other container.
The invention more especially concerns the type of vacuum pumps wherein the luid to be ejected is entraincd with the motive liquid and discharged therewith, as, for example, in vacuum producing apparatus for steam heating plants. v
rllhe principal object of my invention is to provide a pump of simple and eiicient construction whereby the maximum energy generated by the centrifugal force-ot' the liquid in its passage through the rotary impeller is utilized to effect and maintain high degree ot vacuum in a space or chamber to be exhausted. s
l/Vith this and other objects in view, the invention comprises novel features of construction and combinations or parts which will be hereinafter described and claimed.
In the drawingsn Figure 1 is a side elevation, partly in section, of a pump embodying the preferred form 'of my invention.
I Fig. 2 is an velevation of the pump, partly in section, as on the line 2-2 of Fig. 1.
Fig. 3 is a transverse vertical section, as on the line 3 3 of Fig. 1.
Fig. 4 is a sectional detail, enlarged, of vthe Venturi nozzle of the vacuum impeller and the adjacent diffuser chamber'.
Referring to the drawings, 10, 11 designate complemental lower and upper sections constituting a pump housing or casing within which are formed in spaced-relation to each other two chambers 12, 13 in which impellers 14, 15, respectively, are mounted to rotate. In the present instance the impeller 141 constitutes a pressure impeller and the other a vacuum impeller, said impellers being tast on a power driven shaft- 16 which is j ournaled in suitably disposed bearings on the casing.
The chamber 12 is oitl volute loi-m with a suitably located outlet 17, and the impeller 14 which is mounted in this chamber coniprises two spaced apart walls 18 with interposed vanos 19 of proper number and curva- 1928. Serial N0. 113,309.
ture to meet the particular requirements of service. One ot the walls is provided with a central eye 20 in communication with an inlet port 21 formed in the casing. The liquid flows from thisi port to the interior ot the rapidly rotating impeller by way of the eye 2O and is discharged through the outlet 17 of the chamber 12. The function of the impeller 14, when the pump is used in connection with a steam heating system, is to deliver the surplus water of condensation from a suitable receiving chamber to a boiler or 'other point of discharge. as illustrated in my eo-pending application Serial No. 113.308, filed simultaneously herewith.
The chamber 13 is of circular form, and the vacuum impeller 15 which is mounted to rotate therein, is formed similarly to the pressure impeller -from the center to the outer extremities of the vanes 22, but, in the vacuum impeller the side walls 23 are extended routwardly beyond the vanes and the peripheral extensions are provided with oppositely curved internal surfaces to presenta circumferential Venturi nozzle 24. The eye 25 of the impeller 15 communicates with an inlet port 26 formed in the casing. The liquid passes from this port to the rotating impeller through the eye 25 and is ejected through the Venturi nozzle in the form of a diverging annulus, as will hereinafter appear.
Spaced from and surrounding the circumerenti al Venturi nozzle is an annular chamber 27 having fixed therein a series of suitably curved vanes 28 which are arranged at intervals apart so as to intercept and diffuse the liquid discharged from the impeller nozzle, as well as tluids-liquid or gaseous which may be entrained in the discharged liquid. rlhesc vanos are preferably supported in and between two annular plates 29 unich are seated in recesses in the walls ot the chamber 27, and which plates are 'formed to extend liieyond the vanes at the receiving portion ot theI chamber. These plates 29, which constitute in effect side walls for the chamber 27, are flared or outwardly inclined, as at 30, in opposite relation to the adjacent outer flaring portieri l of the Venturi nozzle. The chamber 27, which constitutes a whirlpool or diffuser chamber, is surrounded by a volute or spiral vse '.uum chamber 34.
chamber 32 having a discharge outlet 33 at the upper portion ot the casing.
Formed in the lower portion ot the casing and within the path ol" rotation oit the impeller venturi 214, is a vacuum chamber 34 including ports 35 which are adapted to be connected with the apparatus or system to be exhausted, as, tor example, the return line of a steam heatingl system.
From the foregoing it will be seen that during the rotation ot the vacuum impeller 15 the liquid flowing thereto trom the port 26, is ejected at high velocit),Y through the venturi in the torni ot a diverging annuhis, which, impinging` against the opposing tapering walls of the chamber 2", at or adjacent the inner edges ot the vanes 2S establishes a water seal etl'ective to prevent any air or liquid from flowing baciinto the vac- This liquid annui by its tapering sides, toi-ms a V-shape gap which has the action et' an ejector, in that the energy ot the fluid in iteA passage to the chamber 27 is etl'ective to create und maiutain in the chamber El a partial vacuum sufficient to exhaust the system or apparatus to which the ports 35 are connected. The gases or other fluids thusexpelled troni the system pass into the diffuser chamber '2T and are therein coinmingled or mixed with the liquid contents ot the latter and the Whole finally discharged through the outlet of the volute chamber.
By virtue of the characteristic form ofthe Venturi nozzle` the entire pressure energy et the fluid generated by the centrifugal torce imparted thereto by the ral'iitlly rotating impeller l5 is changed into velocity or ltinetic energy in the portion ot the nozzleV from the outer extremities ofthe venes Q2 to the contracted area ot the nozzle, and as the liquid escapes from this contracted area a portion of the velocity energy is changed back to the form ot pressure energy. Hence both pressure energy and velocity ener V the liquid are present at the circum ence of the impeller l5, the velocit);r energy compensating for any losses that may occur When the liquid is flowing trom the circui'in ference of the impeller, thus insuring pump efficiency.
`Formed in the upper part ot the pump easing are two ports 3S in communication at their lower ends with the supply ports for the central inlets ot' the respective impellers, which ports 3G lead to a suitable point of discharge, and ali'ord vents for the diversion and escape ot entrained g which would otherwise pass with the liq into the impellers.
The vacuum impeller illustrated herein in conjunction witl the pressure iinpeller 14s since the assf'iciated pellers may be advantageously employer .in a vacuum producing apparatus tor steam heating syspiltems as described in my co-pending application atoresaid. The described vacuum impcller niay be used tor the purpose ot ejecting fluids, either liquid or gaseous, under various conditions, and also to perform the itunction olf gas compresaor- My invention is not limited to the particular construction and arrangement ot' parts herein disclosed to exemplify the invention, as the structure may be modied in many respects 'iithin the principle of the invention and the scope ot the appended claims.
l. A pump comprising a casing, an impeller chamber therein, a centrifugal impeller n'iounted to rotate in said chamber and having a central fluid inlet and a C11'- ciunterential Venturi nozzle, a chamber spaced from and encircling said nozzle and adapted to receive a diverging annulus of 3 'lluid ejected from the nozzle, a vacuum chamber in operative communication with the venturi and the encircling chamber, and a discharge chamber encircling the latter chamber.
Q. A pump comprising acasing, an impeller chamber therein, Va. centrifugal impcller mounted to rotate in said chamber and having a cent 'al fluid inlet and a circumferential Venturi nozzle, a chamber spaced :trom and encircling said nozzle and hav' ing flaring side Walls arranged in opposite relation to the outwardly flaring walls of the venturi and adapted to receive a divergiug annulus of fluid ejected from the nozzle, a vacuum chamber in operative communication with the venturi and the encircling chamber, and a discharge chamber encircling the latter chamber.
3. A pump comprising a casing, an impeller chamber therein, a centrifugal i111- peller mounted to rotate in ysaid chamber and having a central fluid inlet and a circumferential Venturi nozzle, a diffuser chamber spaced from and encircling said nozzle and having spaced apart vanes, the
valls ot said latter chamber extending beyond the vanes toward the nozzle, and being flared in opposite relation to the flaring walls of the nozzle and adapted to receive 115 a diver-ging annulus of fluid ejected from the nozzle, a vacuum chamber in operative connnunication with the venturi and the dittuser chamber, and a discharge Chamber encircling the diffuser chamber.
l. A pump comprising a casing, an impeller chamber therein7 a centrifugal impeller mounted to rotate in said chamber and having a central luid inlet and a circumferential Venturi nozzle, a diffuser chamber spaced fromand encircling said nozzle and comprising two annular Wall plates and spaced apart vanes therebetween, said plates extendingbeyond the vanes toward the nozzle and being adapted to receive a diverging annulus of fluid from the nozzle, a vacuum chamber in operative communication with the venturi and the diffuser` chamber, and a discharge chamber encircling the diffuser chamber.
5. A pump comprisinga casing, an impeller chamber therein, a centrifugal im peller mounted to rotate in said chamber and having a central fluid inlet and a circumferential outlet, a supply port leading to said inlet, a vent port communicating with said supply port adjacent the inlet, and a discharge chamber in communication with the impeller chamber.
6. A pump comprising a casing, an impeller chamber therein, a centrifugal impeller mounted to rotate in said chamber and having a central fluid inlet and a circu1nferential Venturi nozzle, a supply port leading to said inlet, a vent port communicating with said supply port adjacent the inlet, a chamber spaced from and encircling said nozzle and adapted to receive a diverc,inf g` annulus of fluid ejected from the nozzle, a vacuum chamber in operative communication with the venturi and the encircling chamber, and a discharge chamber encircling the latter chamber.
7. A centrifugal vacuum impeller, comprising` two side walls, vanes therebetween, a central inlet in one of said Walls, and a circumferential Venturi nozzle between the walls and outwardly of the vanes.
8. A pump comprising a casing having a chamber therein, a. rotar7 impeller having a central fluid inlet leadingl thereto within said chamber, said impeller having,r a circumferential Venturi nozzle at its periphery, vanes within the impeller between the nozzle and the fluid inlet, there being an outlet for vapor and water from said chamber, there being an annular suction space on each side of the nozzle from which air and vapor are drawn by the jet of fluid issuing from the nozzle, an inlet leading to said suction spaces, a fluid chamber in communication with the central fluid inlet to the impeller, and means to rotate the impeller.
Signed at New York in the county and Sta-te of New York this 28th day of May A. D. 1926.
RHEUEL H. FREDERICK.