US1158569A - Multi-impeller single-stage centrifugal pump. - Google Patents

Description

1. H. SEBALD. MULTL-IMPELLER SiNGLESTAGE CENTRIFUGAL PUMP. 7 APPLICATION FILED Nov. 14. 1913. 1,158,569.. Patented Nov. 2, 1915 v 2 SIHEETSSHEET 1.

. J. H. SEBALD. .MULTI-IMPELLEB SINGLE STAGE CENTRIFUGAL/PUMP.

- APPLICATION FILED NOV- 4. 1913- 1,158,569. h Patented Nov. 2,1915.

A 2 .SHEETS-SHEET 2.

' I 114 x 15 v J a 18 /Z 17 15 l fi 2? W J ED STATES FATE ension;-

JOSEPH SEBALD, OF EASTON, PENNSYLVANIA, ASSIGNOR TO A. S. CAMERON STEAM PUMP WORKS, 013 NEW YORK, N..Y.,

A CORPORATION OF NEW JERSEY. I

MULTI-I iI PELLEn SINGLE-STAGE CENTRIFUGAL PUMP.

To all whom it may concern Be it known that I, 'Josnrii subject of the Emperor of Austria-Hunganv, having taken out my first naturalization papers in the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvement in Multi- Impeller Single-Stage Centrifugal Pumps, of which the following is a specification.

This invention relates to centrifugal pumps and more particularly to a multiimpeller single stage pump for use in pumping the water from the hot well of a condenser.

In the pumps which are at present generally used for removing the water from the hot well 6f-.a condenser and which are generally of the single stage type with a double suction central impeller, the stufling boxes in the bearings are always exposed on their inner faces to the water \VlllfilLlS passing to the inlet of the pump and which. of course,

is at the same pressure as the interior of the condense chamber which, in high vacuum condensers, isaround 29 of vacuum. It has been foundv that in such cases it is very difficult to construct the stuffing boxes so that air does not come through into the suction chamber of the pump. hen the water pumped is returned to the condenser, this air will lower the vacuum to an appreciable extent.

The object of the present invention is to construct a pump which has the necessary stuffing boxes at each side-and is soconstructed that the inner ends of both these stufiing boxes are exposed, not to the pressure of the suction of the pump but to the pressure of the pump discharge, which is at least that of the atmosphere and will not allow any air to be forced into the pump through the stufiing boxes. With this objeot in view, I have devised a pump a practical embodiment of which is shown in the accompanying drawings in which:

Figure 1 is a side elevation which shows the suction and discharge pipes and Fig. 2 isa section through Fig. 1 on the line II,II.

ZThe pump, as shown, comprises a cylindrical casing 1 which is divide by partitions 2 intothe central inlet 'hamber 3 into Specification of Letters Patent.

H. SEBALD B.

Patented Nov. 1911 5 Application filed Nbveinberl i, 1913. Serial No. 800,929.

chambers 5 which discharge lll'lI'OllghnlHdlvidual discharge pipes 6. Keyed L pon'a shaft .7 are impellers 8 which rotate inimpeller chambers and consist of disks 9,

0 blades 10 and covers 11. The disks 9 are imperforate and the covers 11 bend around into sleeves 12 which engagethe inner edges of partitions 2. Each ,of the impellers therefore has but a single suction opening I which opens from the central inlet chamber 3. The shaft 7 is j'ournaled in bearing boxes 13 which fit into cylindrical apertures in the sides of the casing 1. In the outer portions. of the bearing boxes 13, which also serve as stufiing boxes, are stuffing glands which are provided with water seals 14 to which water is conveyed by passages 15 in the ca ing. The disks 9 are spaced a short distance vay from the sides of the casing 1 so th-t a passage is provided which allows the water under pressure from the discharge of the impellers to pass down and come in contact with the inner facesof: the. bearing boxes 13. In the inner portion of the boxes 13 are glands 16 which surround the shaft and are connected by passages 17 to the casing so that water under pressure in the casing can enter the glands. bushings 19 allow the water to contact with the surface of the shaft itself.

It will be evident that with the above described construction the inner faces of the boxes13 will be at all times subjected to contact with water at the pressure of the pump discharge, this water being conveyed also to the glands 16 and thewater seal 14-. As the discharge pressure of the water is above that of the atmosphere it will be practically impossible for any air to come along the shaft or otherwise into the pump casing. Although the pump here is shown with stuffing boxes which serve also as bearing boxes, it is'evident that outside bearings could be provided and boxes 13 serve only as stufling boxes; I A

It isto be understood that the. present showing and description disclose-s only one specified modification of my invention and in the spirit and scope of the invention as expressed in the claims.

What I claim is: 1. In a multi-impeller ber, and impellerthambers on each .sideof Perforations 18 in the centrifugal. pump; -a casing comprising a central inlet chamgj tit?- other forms. and modifications are included; If 4 said central chamber, coYerd impellei in said impcllcr chambers hav inginlets commum :ating only with said central chamber,

a colomon'shaft for said impellers, boxes in th a outer faces of said, impeller chambers,

"stufli glands in said boxes, water glands slim unding said shaft inside of said stufling glands and means for conveying fluid under pressure from the discharge of said imp? llers to the impeller chambers contiguous 10 said boxes.

2. In amulti-impeller centrifugal pump a caring comprising a central inlet chamber I and impeller chambers on each side of said.

cent 'al chamber, covered impellers in said impeller chambers having their only inlets a as, 569

my liangl.

JOSEPH H. SEBALD. VVltnesses:

' FRED S. OVERTON,

ALICE C. BRORSTROM.

Images