US1028564A - Self-cleaning bearing for submerged shafts. - Google Patents

Description

W. L. FORWARD. I SELF GLEANING BEARING FOR SUBMERGED SHAFTS.

APPLIOATION FILED DEG. 29, 1910. I

1,028,564, Patented June 4, 1912.

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BERKELEY, CALIFORNIA, ASSIGNOR '10 BYRON JACKSON IRON WORKS, 1510,01? SAN FRANCISCO, CALIFORNIA, A CORPORATION OF GALI- Patented June a, 1912.

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SELF-CLEANING BEARING FOR SUBMEEGED SHAFTS.

1,928,5fid. Specification ofvl'aetters Patent.

, Application filed December 29, 1910. Serial N0. 600,000.

To all whom it mag concern:

Be it known that I, WALTER L. FORWARD,

citizen of the United States, residing at Berkeley,

State of California, have invented new and useful Improvements in Se'lf Cleaning Bear- I ings for Submerged Shafts, of which the following is a specification.

This invention relates to shaft bearings and especially pertains to pump bearingswhich are submerged.

The object of this invention is to provide as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which-- Figure 1 is a central section through a portion of a turbine pump showing the improved self-cleaning bearing. Fig. 2 is a plan view of the automatic cleaning cap. Fig. 3 isa transverse section across the cap. It is desirable to provide a bearing for pumps in which one of the bearings of the driving shaft, as A, may be protected to the greatest possible extent from the grit and accumulation of foreign materials that would be apt to enter the bearing and cut or ind the shaft or the bearing causing rap d wear of the parts. Inthe present embodiment of my invention the shaft Ais supported in a Babbitt sleeve 2 which is shown as lining the hub or hearing 3 of. the frame of a pump or other machine, as indi 'cated at B. The upper end of theBabbit-t lining 2 projects slightly above the upper end of the bearing hub 3 and is embraced by a suitable cap or collar 4 within the bore 5 of which the babbitt 2 has a running fit on its exterior, as at 6., so that during the operation of the pump impeller fluid under pressure leaks around the running joint 6.

'As clearlyshown in Fig. 2, the cap or collard; is providedwith a plurality of diametrically disposed opposite ports or passageways 8 communicating withthe bore 5 in the cap 4. Adjacent one edge of each, port 8 on opposite sides of the bearing cleanmg cap 4 and on opposite sides of the diametrical lineprojected through the cap 4 in the county of Alameda and.

upon the water to discharge trifugal force, said cap having a port 11c;

are disposed small blades, projections or vanes 9, which, when the shaft A is revolving, impel the water leaking'past the running joint 6 into the chamber 5 outwardly by centrifugal force through the ports 8.

When the impeller 7 of the pump is running a suction created in the passageway of the chamber 13 causes a current of water to ascend through the pump and a small percent-age of the water finds access to the chamber 5 through the running joint 6 between the cap 4 and the babbitt 2.-

The essential function of the ca 4 with its impelling vanes 9 is to rapidly ischarge all fluid and its suspended particles of grit or other foreign material upwardly through the ports 8, thereby preventin their settling uponv the exposed end of the abbitt 2, and preventing their traveling downward around the shaft A and into the bore of the 'babbitt and grinding the parts.

It'will be seen that the Babbitt sleeve 2 extends above the cast iron boss 3 in such a manner as to permit the sand cap to come down over the end of the same so that the sand or other grit in the water, if the same were to work toward the hearing, would have to follow a path which leads between the rotating sand cap secured on the shaft and the Babbitt sleeve, as indicated by the arrow at. As the particles of sand pass forward between these two members they enter the chamber 5 where they are thrown into contact with the vanes located on the inside of the sand cap and caused to flow outwardly by centrifugal force through the ports 8 of the cap 4.

Having thus described my invent-ion, What I claim anddesire to secure by Letters Patent is 1. A self-clearing bearing comprising a shaft,'a sleeve therefor, and a cap chambered to receive the end of the sleeve and having a running fit, therewith, said cap being secured upon the shaft and having a plurality of ports and having means upon the interior for positively discharging water by centrifugal force through said ports.

2. A self-clearing. bearing comprising a,

Shaina sleeve therefor, and a cap secured to the shaft, said cap having a running fit with the upper end of the sleeve and said cap having a chamber with means therein acting the same by centhroughwhich the discharge of water takes place.

3. A cleaningdevice for submerged shaft bearings comprising a shaft, a bearing mem-- ber adapted to receive said shaft, a cap secured upon the shaft and'having a port, said,

caphaving also, a chamber adapted to receive the end of the bearing member and having a running fit therewith, and means on the interior of the cap for discharging fluid leaking ast the bearing member into the chamber 0 the cap, said means including a vane formed upon the interior of the cap and adapted to discharge water by centrifugal force through a port formed in the cap adjacent the vane.

4. A cleaning device for submerged shaft bearings comprising a shaft, a bearing member adapted to receive said shaft, a

adapted to of the cap,

cap secured upon the shaft port, said cap having also, a chamber receive the end ot the bearing member and having a running fit therewith, and means for discharging fluid leaking past the hearing said means including a plurality of impeller vanes formed upon the interior of a cap and adaptedto discharge fluid by centrifugal force thrcu h ports formed in the wall of the cap a vanes. v

In testimony whereof I have hereunto set presence of two subscribing my hand in the wltnesses. 7 WALTER L. FORWARD. Witnesses:

G. H. STRONG, CHARLns EDELMAN.

and having a 20 member into the chamber '25 i m h cf-the so

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