US2631575A

US2631575A - Circulating water pump for internal-combustion engines

Info

Publication number: US2631575A
Application number: US121480A
Authority: US
Inventors: George N Little
Original assignee: GEORGE N LITTLE; J LEO SPANGLER; WALTER S PYLE
Current assignee: GEORGE N LITTLE; J LEO SPANGLER; WALTER S PYLE
Priority date: 1949-10-15
Filing date: 1949-10-15
Publication date: 1953-03-17
Anticipated expiration: 1970-03-17

Description

March 17, 1953 G. N. LITTLE 2,631,575

CIRCULATING WATER PUMP FOR INTERNAL-COMBUSTION ENGINES Filed Oct. 15, 1949 2 SHEETS-SHEET 1 1y. 1 Z I A y 2 fl ii 2 4 f; 7 4; a /6 A? 71 24 J J 7/ J5 J4 J4 7/ Z J J i I g 2 I 5 a; v K m mmvroze, feyzya/ZZ 177/62 izia/m y.

G. N. LITTLE March 17, 1953 CIRCULATING WATER PUMP FOR INTERNAL-COMBUSTION ENGINES Filed 001;. 15, 1949 2. SHEETSSHEET 2 I my uu u INVENIOR, fad/y: JK'J/ff/f.

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Patented Mar. 17, 1953 CIRCULATING WATER PUMP FOR INTERNAL-COMBUSTIQN ENGINES- George N. Little, Kansas (City, Mo., assignor of one-fourth to himself, one-fourth to Walter S. Pyle, Kansas City, one-fourth to Charles 0. Spangler and one-fourth to J. Leo Spangler,

Independence, Mo.

Application October 15, 1949, Serial No. 121,480

8 Claims.

This invention relates to new and useful improvements in water circulating pumps, and has particular reference to a water circulating pump suitable for use in the cooling systems of internal combustion engines.

The principal object of the present invention is the provision of a water circulating pump wherein the impeller and the drive pulley are carried by a single bearing carried by the pump housing whereby the lateral belt load for driving the pulley is not transmitted to the impeller or impeller shaft.

Another object is the provision, in a pump of the character described, of a drive pulley carried by a bearing mounted on the pump housing, an impeller shaft fixed to said pulley and extending within said housing, and an impeller fixed on said shaft within said housing, said shaft and impeller floating within said housing, that is, the shaft and impeller do not have bearings in and do not contact said housing.

Another object is the provision, in a pump of the character described, of means whereby the sealed connection at the point where the impeller shaft enters the pump housing is disposed at a point remote from the bearings supporting said shaft, whereby water possibly leaking through said joint cannot enter said bearings.

Other objects are simplicity and economy of construction, efficiency, and ease of disassembly for repair or replacement of parts.

With these objects in view, as well as other objects which will appear in the course of the specification, reference will be had to the drawing, wherein:

Fig. 1 is a plan view of a water circulating pump embodying the present invention shown mounted on the fragmentarily shown block of an internal combustion engine, with parts broken away.

Fig. 2 is a section taken on line II-II of Fig. 1.

Fig. 3 is a front elevation of the pump.

Fig. 4 is a vertical section taken on line IV-IV of Fig. 2.

Fig. 5 is a section taken on line VV of Fig. 2.

Fig. 6 is a side elevational View of the bearing sleeve.

Like reference numerals apply to similar parts throughout the several views, and the numeral 2 applies to a pump housing having a substan- 4 tially cylindrical water chamber 4 in one end and an internally threaded axial bore 6 in its opposite end. The chamber Ll is provided with an axial inlet passageway 8 and a peripheral outlet passageway l0 communicating with the water cooling a water-tight seal between the housing and the engine block.

An externally threaded tubular bearing sleeve 22 is threaded into bore 6 of pump housing 2,

and is disposed coaxially with pump chamber l of said housing. A set screw 23 holds said sleeve firmly in place. Said sleeve extends outwardly from said housing, and is provided at its outer end with a hexagonal section 24 for receiving a wrench or the like. Said sleeve also extends within housing 2, and a lock nut 26 is threaded on the inner end thereof. A lead washer 2B disposed between said lock nut and said housing provides a fixed and permanent seal preventing leakage of water around the bearing sleeve. Thus the bearing sleeve is rigidly attached to and forms an axial extension of the housing, Drive pulley 135i, having a V-groove 32 for receiving the drive belt, not shown, is mounted for axial rotation on bearing sleeve 22 outside of housing 2. Said pulley is carried by a doublerow ball bearing 35, the inner race 36 of which is mounted on a cylndrical portion 38 of said sleeve. Said inner bearing race is prevented from moving longitudinally along the bearing sleeve by its engagement between the end of housing 2 and a shoulder formed on said sleeve. The outer race 42 of the bearing is push-fitted into a recess it formed in the hub of pulley 30. A standard oil fitting 46 for lubricating ball bearing 34 is fixed in the outer face of pulley 3d and communicates with recess 44. Said recess is sealed at its inner end by a gasket 48 disposed between the inner end of bearing race 36 and the bottom of recess i l, and at its outer end is sealed by the usual sealing ring 50 extending between the bearing races and secured in place by a split ring 52.

Drive pulley 36 is provided with a plurality of lugs extending outwardly from the outer face thereof parallel to hearing sleeve 22. A plate 56 is rigidly secured to the outer ends of said lugs by means of screws 58, said plate being disposed at right angles t the axis of the bearing sleeve, and the inner face of said plate being spaced apart from the outer end of said bearing sleeve. An impeller shaft 5% is carried axially in bearing sleeve 22, being of substantially smaller diameter than the internal diameter of said sleeve. The

. outer end of said shaft is threaded securely into plate 55, and an impeller wheel 62 is threaded securely to the inner end of said shaft within chamber l of the pump housing. Said impeller wheel includes a back face plate 54 and radially extending vanes 66, whereby when said wheel is rotated by rotating pulley 39, water will be drawn inwardly through inlet passage 8 and forced outwardly through outlet passage H3, and thence throughout the cooling system of the engine in the conventional manner. Screws 58 may also be used for attaching a motor-cooling fan, not shown, to plate 56. When said screws are removed for attaching or detaching said fan, the pump is held in the assembled position by a pair of screws 68 extending through plate 56 and threaded into the forward face of pulley 39, as best shown in Fig. 2.

An annular recess it concentric with shaft 69 is formed in the inner face of plate 56. A cylindrical sheet metal sleeve 12 is press fittted within saidrecess and'a similar sleeve M is press fitted within sleeve '52. At their inner ends, at the bottom of recess ltl, said sleeves are formed respectively to present inwardly-turned flanges 1E and 18, said flanges being spaced apart longitudinally of shaft 69. A frustoconical tube 8!? of rubber or other suitable fiexible material is disposed within recess '58, having its inner end clamped between flanges it? and it, and having its'outer end cemented or otherwise securely fixed to the outer edge of an annular rin 32 made of a graphite composition or other suitable bearing material. Said ring is disposed about shaft 69, and bears rotatably against the outer end of bearing sleeve 22. Said sleeve is provided with a short longitudinal extension 8d of reduced diameter which projects within ring 82 to prevent lateral movement thereof. A helical compression spring 86 is disposed within recess 70, bearing at one end against the floor of said recess and at its opposite end against ring 82, urging said ring resiliently against bearing sleeve 22. Thus an efficient seal is provided which normally will prevent leakage of water from the pump, which will not impart any lateral stresses to the impeller shaft, and which is yieldable both longitudinally and laterally relative to the shaft 60, in order to compensate for inaccuracies of manufacture and assembly of the parts. Furthermore, should any leakage occur, it would occur at a point remote from the main bearing 34, so that water could not enter said bearing to cause rusting or deterioration thereof.

Thus it is apparent that a water circulating pump having several advantages has been produced. The drive pulley supports the entire load of the pulley and is carried on the pump housing, thereby removing all lateral or bending stresses from the impeller shaft. The impeller and impeller shaft are supported entirely by the drive pulley, and float in the housing without bearings therein and without touching said housing at any point. This eliminates the set of bearings customarily employed for the shaft in pumps wherein the drive pulley is supported by the housing. Also, besides simplicity and economy, this arrangement permits smoother operation and larger manufacturing tolerances. In pumps wherein the drive pulley and impeller shaft are rigidly connected, and supported by separate bearings, very slight eccentricities of the two bearings will cause a serious drag on the pump operation and cause rapid wear of the bearings. Elimination of one set of bearings obviates this difficulty.

Although I have shown a specific embodiment of my invention, it is apparent that many minor variations of construction and operation could be made without departing from the spirit of the invention.

What I claim is:

l. A water circulating pump comprising a housing having an internal chamber and inlet and outlet passages communicating with said chamber, said housing having an axial tubular extension open at its outer end and communicating with said chamber, a drive pulley carried for rotation on said extension, an impeller shaft of smaller diameter than the internal diameter of said extension rigidly fixed to said pulley and extending axially through said extension into said housing, an impeller wheel fixed to said shaft within said pump chamber, a sealing member carried movably by said pulley, and resilient means for urging said sealing member against the end of said housing extension in a direction parallel to said shaft.

2. A water circulating pump comprising a housing having an internal chamber and inlet 1 and outlet passages communicating with said chamber, said housing having an axial tubular extension open at its outer end and communicating with said chamber, a drive pulley carried for rotation on said extension, a plate fixed to said pulley and disposed in spaced relation to the outer end of said housing extension, an impeller shaft of smaller diameter than the internal diameter of said housing extension fixed in said plate and extending axially through said housing extension into said housing, an impeller wheel fixed to said shaft within said pump chamber, a sealing member carried by said plate for movement longitudinally and laterally relative to said shaft, and resilient means for urging said sealing member against the free end of said housing extension.

3. A water circulating pump comprising a housing having an internal chamber and inlet and outlet passages communicating with said chamber, said housing having an axial tubular extension open at its outer end and communicating with said chamber, a drive pulley carried for rotation on said extension, a plate fixed to said pulley and disposed in spaced relation to the outer end of said housing extension, an impeller shaft of smaller diameter than the internal diameter of said housing extension fixed in said plate and extending axially through said housing extension into said housing, an impeller wheel fixed to said shaft within said pump chamber, a tubular member of flexible material secured at one end to said plate and at its opposite end to a sealing ring and a spring urging said sealing ring resiliently against the end of said housing extension.

4. A water circulating pump comprising a housing having an internal chamber and inlet and outlet passages communicating with said chamber, said housing having an axial tubular extension open at its outer end and communicating with said chamber, a drive pulley carried for rotation on said extension, a plate fixed to said pulley and disposed in spaced relation to the outer end of said housing extension, an impeller shaft of smaller diameter than the internal diameter of said housing extension fixed in said plate and extending axially through said housing extension into said housing, an impeller Wheel fixed to said shaft within said pump chamber, a tubular. member of flexible material secured at one end to said plate and at its opposite end to an annular sealing ring, and a spring urging said sealing ring against the end of said housing extension, said housing extension being formed to present a reduced portion disposed within the inner diameter of said sealing ring.

5. A water circulating pump comprising a housing having an internal chamber and inlet and outlet-passage communicating with said chamber, said housing having an axial tubular extension open at its outer end and communicating with said chamber, a drive pulley rotatably mounted on said housing extension in spaced relation from the free end thereof, a plate fixed to said pulley and overlying the free end of said housing extension in spaced apart relation therefrom, a shaft of smaller diameter than the internal diameter of said housing extension fixed in said plate" and extending axially through said housing extension, an impeller Wheel fixed to said shaft within said housing chamber, a tubular member of flexible material disposed about said shaft, said tubular member being sealed at one end to said plate, an annular sealing ring having its outer edge sealed in the opposite end of said flexible tubular member, and a spring for urging said sealing ring longitudinally against the free end of said housing extension, said housing extension having a reduced portion fitting within the inner diameter of said sealing ring.

6. A pump comprising a housing adapted to be secured removably to an internal combustion engine and provided with an internal chamber having inlet and outlet passages communicating with the water-cooling system of said engine, said housing having an axial tubular extension open at its outer end and communicating with said pump chamber, a drive pulley mounted for rotation on said housing extension, an impeller shaft of smaller diameter than the internal diameter of said extension carried rigidly by said pulley and extending axially through said housing extension, an impeller wheel fixed to said shaft within said pump chamber, a sealing member carried by said pulley for movement parallel to said shaft, and resilient means for urging said sealing member against the free end of said housing extension.

7. A pump comprising a housing adapted to be secured removably to an internal combustion engine and provided with an internal chamber having inlet and outlet passages communicating with the water-cooling system of said engine, said housing having an axial tubular extension open at its outer end and communicating with said pump chamber, a drive pulley mounted for rotation on said housing extension, an impeller shaft of smaller diameter than the internal diameter of said extension carried rigidly by said pulley and extending axially through said housing extension, an impeller wheel fixed to said shaft within said pump chamber, a sealing member carried by said pulley for movement parallel and transverse to said shaft, and resilient means for urging said sealing member longitudinally against the free end of said housing extension, said housing extension being formed to engage said sealing memher to prevent movement thereof transverse to said housing extension.

8. A pump comprising a housing adapted to be secured removably to an internal combustion engine and provided with an internal chamber having inlet and outlet passages communicating with the water-cooling system of said engine, said housing having an axial tubular extension open at its outer end and communicating with said pump chamber, a drive pulley mounted for rotation on said housing extension in spaced relation from the free end thereof, a plate fixed to said pulley and overlying the free end of said housing extension in spaced-apart relation therefrom, an impeller shaft of smaller diameter than the internal diameter of said extension fixed in said plate and extending axially through said housing extension, an impeller wheel fixed to said shaft within said pump chamber, a tubular member of flexible material sealed at one end to said plate, an annular sealing ring having its outer edge sealed in the opposite end of said flexible tube, and resilient means urging said sealing ring against the free end of said housing extension, said housing extension having a reduced circular portion extending within said sealing ring.

GEORGE N. LITTLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,930,586 Delaval-Crow Oct. 17, 1933 1,960,282 Walker May 29, 1934 2,005,193 Mayo June 18, 1935 2,028,360 Sprink Jan. 21, 1936 2,522,231 Loftis Sept. 12, 1950 FOREIGN PATENTS Number Country Date 157,480 Great Britain Jan. 27, 1921 627,928 France Oct. 15, 1927