US440252A - Centrifugal pump - Google Patents

Description

(No Model.)

B. JACKSON.

GENTRIPUGAL PUMP.

Patented Nov. 11, 1.890.

Wz'neses:

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NITE STATES BYRON JACKSON, OF SAN FRANCISCO, CALIFORNIA.

CENTRIFU GAL PUMP.

SPECIFICATION forming part of Letters Patent No. 440,252, dated November 11, 1890. Application filed March l0, 1890. Serial No. 343x350 (N0 mOeL) To @ZZ whom it may concern:

Be it known that I, BYRON JAoKsoN, of the city and county of San Francisco, and State of California, have invented certain Improvements in Centrifugal Pumps; and Ihereby declare the following to be a true specification and description of the same, reference being had to the accompanying drawings and the letters of reference thereon. Y

This invention relates to centrifugal pumps, especially to those wherein the wheels revolve in a horizontal plane, and intended for pumping from mines or pits.

It consists in sealin g the packin g-glands and inlet-pipes against the entrance of air, and thus insure perfect suction to the atmospheric limit; also, in the manner of constructing and arranging the packing-glands of such pumps either vertical or horizontal to secure their alignment and true adjustment, and in other features, to be hereinafter more fully explained in connection with the drawings.

The objects of my invention are to guard against the entrance of air around the spindles of centrifugal pumps when the suction level varies, as in the case of drawing from tubular wells or other varyin g sources; to secure more complete lubrication of the bearings of the pump-spindles, and a convenient adjustment of such packing-glandsby means of a single screw; also, balance the wheel and shaft-ing by the pressure of the column of water in the pipes, and to dispense with bearings beneath the pump-wheels, so that all details, including the suction-pipes, will be removable from the top.

The drawing represents a vertical section through one of my improved pumps as they are constructed for use in Wells or pits.

A is the main casing, volute in form.

B is the Wheel or revolving piston, and C the driving shaft or spindle. n

D D are suction-inlets through which the water enters.

E is the discharge-pipe.

F is a packing-gland to prevent the cntrance of air', and G G are bearings for the driving-spindle.

His a chamber surrounding the packinggland F, and is connected to the dischargepipe E by means of the small pipe I.

.I is a removable plate permitting access to the chamber II for adjusting the gland F and for inspecting or removing the fibrous packing at K.

These pumps being intended especially for use in pits and wells, or at low levels where the bottom is not accessible, the su ct-ion-pipes as well as all other details are placed on top above the main casing, which rests on a sole plate or frame at the bottom of apit, as shown. To avoid bearings for the main spindle C below the wheel B, I place two long substantial bearings G G above the wheel, and between these interpose a packinggland F, which, in addition to its function of holding and compressing the packing at K, also constitutes a bearing for the spindle, thus dispensing with abearing below the Wheel, which has been heretofore necessary. The packinggland at F, around the spindle C, is not enough to guard against the entrance of air when the suction height is increased by the water fallingin sumps or Wells, and the inward pressure is thus increased. To guard against this,I surround the stuffing-box and gland with a close chamber II, and then connect this chamber with the discharge-pipe E by means of a .small pipe I, as shown. The chamberHbeing thus llcd with water as soon as the pump 8o starts, any leak around the fibrous packing at K is supplied by water and no air enters. f5 At the same time the pressure in the chamber@l II forces the Water into the gland F and upper@ bearing G', carrying off any heat generated?.y 85 and providing efficient lubrication. When the t pump is driven Without being charged, as in the case of starting, the cup at M being supplied with oil provides efficient lubrication until the chamber H is filled with Water and the air expelled. The spindle or shaft C, to which power is applied, can extend up to the surface of the ground by means of connected shafts, or power can be applied by any of the well-known methods in such cases.

O is a flange on the pump, iitted to the case A, of suitable diameter to balance the shafting and attachments by the difference of area, receiving pressure of Water on the lower and upper side of the Wheel B. The pressure is relieved inside of the flange O by a hole P through the runner connecting with the suction-inlet. By making this flange O of suitable proportions to the inlet the shafting can I5 A, a `horizontal wheel or piston B, a vertical be balanced by the water-pressure, relieving the shaft C of end-thrust in either direct-ion.

The suction-inlets D are made double, so that in drawing water from Wells connections can be made to one or more wells at each side, and in case of drawing from a single well one of these inlets is closed by a plate.

What I claim as new, and desire to secure by Letters Patent, is-

l. In a centrifugal pump, in combination,a hollow chamber or casing A, arranged horizontally, vertical bearing G, surmounting the said chamber or casing and surrounded with a housing, suction inlet orinlets D, outside said bearing G and communicating with the casing 4revolving shaft O, vertical upper bearing G',

separatedfrom the bearing G, housing around said upper bearing, and a vertical packed gland F between the bearings G G' and'sur- Y l "rounded by suitable housing, substantially as f described. l v l 2. Inahorizontal centrifugal pump, in corn- J bination,'a horizontalhollow chamber or cas-, ing A ,vertical bearing G, surlnounting the l'said lchamber' or casing A, suction inlet or inlets D, outside said bearing G and commu- E of the casing of the pump, substantially as described. l

3. In ahorizontal centrifugal pump, in cornbination, a horizontal hollow chamber or casing A, horizontally-revolving wheel or piston B, vertical shaft C, separated vertical bearings G G', packed gland F, having asuitable vertical housing, ehainberedange() on the chamber A, and passage or passages Rin the vhub of, the Wheel ory pistonuand in `co'rnrnunication with its dischargerarins,or'passages and with the chamber formed by the ange O,

substantially as ,d escribcd- 4 v,

In testimonyowhereof Ih'ereuntplaliix my signaturein the presence oi'f1 twovitnesses. Y BYRON JACKSON. Witnesses:

Louis MARSHALL, J. H. BLOOD.

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