US2028360A

US2028360A - Pump

Info

Publication number: US2028360A
Application number: US676436A
Authority: US
Inventors: Isaac W Sprink
Original assignee: LOGAN GEAR Co
Current assignee: LOGAN GEAR Co
Priority date: 1933-06-19
Filing date: 1933-06-19
Publication date: 1936-01-21
Anticipated expiration: 1953-01-21

Description

I. w. SPRIINK Jan. 21, 1936.

PUMP

Filed June 19, 1953 YINVENTOR [s/mc h/. SPE/A A ATTORN EYS Patented Jan. 21, 1936 UNITED STATES PUMP Isaac W. Sprink, Whitehouse, Ohio, assignor to The Logan Gear Company, Toledo, Ohio, a corporation of Ohio Application June 19,

2 Claims.

combination with an improved mounting of impeller shaft or driving means.

The invention contemplates a novel arrangement of pump impeller and driving means wherein wear of the parts is reduced to a minimum and wherein a compact arrangement of parts may be attained effecting a material saving in expense and material and manufacturing economies, as well as to facilitate easy assemblage and removal of the parts.

I An object of the invention is the provision of a unitary construction of combined pump impeller seal construction and driving means,

' wherein the parts are so mounted as to prevent undue wear upon the bearings, prolonging the life of the structure, the arrangement including a simple and-effective lubricating means for the mechanism. I Further objects and advantages are within the scope of this invention such. as relate to the arrangement, operation and function of the related elements of the structure, to various details of construction and to combinations of parts, elements per se, and to economies of manufacture and numerous other features as will be apparent from a consideration of the specification and a preferred form as embodied in a pump of the.

"centrifugal type particularly adapted for circulating fluids, as in circulating the cooling medium of internal combustion engines, but it is to be understood that I contemplate the use of the invention in any arrangement where the same may be found to be applicable, such as, for example, in lubrication systems or other installation where it is desirable to transfer or circulate fluids.

1933, Serial No. 676,436

Referring to the drawing in detail, 10 designates in the embodiment illustrated a manifold of an internal combustion engine which may be integrally cast with a cylinder block, or in some arrangements a separate member for conducting cooling fluid medium to or from a radiator or condenser unit (not shown). Secured to the. manifold I0 is a casing or housing ll having a fluid passage I2, the latter being adapted to be connected to the condenser or radiator unit (not shown) by means of a flexible tubing 14 which is secured to the pump casing by means of a band I5 or other suitable retaining means. It is to be understood that the housing or casing ll may be made of any suitable material as, for example, cast iron, sheet metal, composition material or the like, Without departing from the spirit and scope of the invention.

The housing H is preferably formed with two aligned projecting portions or bosses I! and .l8

in spaced relation, a chamber [9 being arranged between the bosses suitably adapted to contain a supply of lubricant. The projections I! and I8 are centrally bored to receive a shaft 20, one end of the shaft carrying a pump impeller structure 2 2, the other end of the shaft carrying a pulley structure or other driving means 23.

The bore in the projection I! of the pump housing is preferably arranged to receive a bearing bushing 25 which supports shaft 20 adjacent the impeller 22. In the embodiment illustrated, the pump impeller 22 is bored to snugly fit the end of the shaft 20 and is fixedly secured thereto by means of a pin 21 snugly received in openings in the shaft and impeller hub 28. As illustrated, the pin 21' is a snug fit in the transverse bore in the impeller hub and shaft and may be split throughout a portion of its length so as to be frictionally held in position, yet may be easily driven out for purposes of repair or replacement. The bore in projection N3 of the housing H is preferably slightly larger than the diameter of shaft 20 so that the shaftis normally out of contact with the bore and supported in a manner hereinafter described. The driving means includes a pulley structure 23 which is provided with a hub portion 29 for supporting the pulley upon shaft 20, a pin 3| similar to pin 21 fixedly securing these elements in position. Pulley 23 is also preferably provided with a V-shaped groove 2| adapted to receive a belt 24 or other suitable driving means,

The sealing arrangement is inclusive of a disc or sealing washer 30, one surface of which frictionally engages an end of projection H, the

other surface of the washer 30 being engaged by a gasket 32 of cork, rubber or other suitable material inherently resilient or yieldable, the gasket 32 snugly engaging the surface of shaft 20 and rotatable therewith to prevent seepage of fluid along the shaft into bushing 25. The exterior periphery of gasket, 32 is preferably provided with an annular groove or indentation 33 which accommodates a coiled spring 34 or other suitable means to insure snug engagement. of gasket 32 with the shaft 20 by exerting inward pressure upon the gasket. A metallic disc or element 36 serving as a thrust washer is positioned adjacent gasket 32, the element 36 being in turn engaged by a helical spring or resilient member 31 surrounding shaft 20 and which also engages the interior end wall of impeller hub 28. By this arrangement, the spring 31 urges gasket 32 into close engagement with sealing disc 30, so that the disc 30 is maintained in resilient frictional contact with an end portion of projection H as a sealing surface at all times, which engagement prevents leakage of fluid into bushing 25. The sealing washer 30 may be of a suitable composite material as, for example, fibre, bakelite or phenol condensation product, the latter having been found to produce very satisfactory results, but it is to be understood that any other suitable materials may be used without departing from the spirit of the invention. However, by using a phenol condensation product in engagement with a metallic hearing or boss as a sealing surface, the washer attains in operation a very smooth finish or polish due to the frictional contact with the bearing boss which is found to increase the effectiveness of the seal.

The washer 30 is provided with a plurality of peripherally extending driving projections 39, and the impeller 22 is formed with a similar number of spaced longitudinal recesses 4| for receiving the projections 39 to cause positive rotation of the Washer 30 with the shaft and impeller 22. The assembly of washer 30, gasket 32, thrust washer 36 and spring 31 upon shaft 20 is such that all of the elements are contained within the impeller 22, facilitating assembly of the arrangement in the pump mechanism.

The exterior of projection or boss I8 is adapted to snugly receive an inner race 43 of an antifriction bearing assembly, which for purpose of illustration, is provided with a plurality of bearing balls 44, held in spaced relation by means of a ball retainer 42. The outer race 45 of the bearing is snugly received within a central recess 41 in drive member or pulley 23. The

bearing races

43 and 45 are preferably press fitted for tight engagement with their respective supporting elements so that they are fixed therewith. By this arrangement wear on the shaft 20 is avoided as the pulley 23 is supported adjacent the extension l8 through the medium of the antifriction bearing, the shaft being positioned out of frictional engagement with the bore in boss l8. By this means a driving shaft of considerably lesser diameter may be utilized than has heretofore been possible with plain bearing which required comparatively large bearing surface to prevent excessive wear. The pulley is also maintained in a fixed longitudinal position with respect to the boss l8 and longitudinal movement of shaft 20 and impeller 22 is substantially'eliminated due to this bearing arrangement. The ball bearing arrangement illustrated also serves to absorb any end thrust due to compression of spring 31, thus eliminating additional means to properly position the shaft as heretofore employed. The load or stress applied to the pulley 23 from driving belt 24 is thus effectively carried by the boss 18 through the anti-friction bearing structure and thus, a device has been provided which substantially eliminates wear and. minimizes the service replacement of parts.

In order that the structure be properly lubricated, chamber I9 is filled with a suitable lubricantby means of fitting 53 secured in a wall thereof. The lubricant flows along shaft 20 through the bore in boss 18 to lubricate the ball bearings 44 and

raceways

43 and 45. A lubricant seal or retainer consisting of a sheet metal annulus is carried by the outer race and houses a sealing washer of suitable material as, for example, felt which bears against the exterior periphery of the inner race 43 and prevents the escape of lubricant from the bearing structure. Bearing bushing 25 also receives its lubrication from the chamber I9, the lubricant creeping along shaft 20 to the sealing washer 39.

It is apparent that, within the scope of the invention modifications and different arrangements may be made other than is herein disclosed, and the present disclosure is illustrative merely, the invention comprehending all variations thereof.

What I claim is:

1. In combination, a housing; a lubricant chamber in said housing; a shaft; a plurality of bosses projecting from said chamber having openings to accommodate the shaft; 2. pump impeller mounted on the shaft adjacent one of said bosses; fluid sealing means between said impeller and said boss; a driving pulley mounted on the shaft adjacent a second boss; an anti-friction bearing between said second boss and said pulley for supporting said shaft; the opening in said boss adjacent the anti-friction bearing being larger than the shaft to facilitate passage of lubricant from said chamber to the bearing.

2. In combination, a housing provided with a plurality of projections; a shaft; an impeller carried by said shaft and having a recess therein; a fluid sealing means within said recess, said sealing means including a sealing washer, a cork gasket surrounding said shaft; and a resilient means to urge said washer into engagement with one of said projections to form a seal; driving means secured to said shaft having a recess therein for accommodating an anti-friction ball bearing, a second projection forming a support for said bearing; the parts being arranged whereby the bearing defines the longitudinal position of the shaft and a lubricant chamber between said sealing means and said driving means to supply lubricant to said bearing.

ISAAC W. SPRINK.