US2260321A - Mounting for supporting rotary drums - Google Patents

Description

Oct. 28, 1941.

H. w. HOW

MOUNTING FOR SUPQORTING ROTARY DRUMS Filed Oct. 9, 1939 2 Sheets-Sheet l j o o a w? 2 3 ill, TH a C 0 l 5 v 9 o\ Z 3 m ar W m] I l 1 I] F 3 a b 7 7 w 6 H z W 3 M I 1 a o o a 2 m 7 r Z0 0 lNVENTOR 1 0 BYCZ EW ATTOR-NEYS! Oct. 28, 1941. H. w. HOW 2,260,321

MOUNTING FOR SUPPORTING ROTARYDRUMS Filed Oct. 9, 1939 2 Sheets-Sheet 2 mm m 37 Z7 35 lhi. 26 34 35 INVENTOR v Wmw. W

2 6 ATTOv R N EYS Patented Oct. 28, 1941 MOUNTING FOR SUPPORTING ROTARY DRUMS Harlan W. How, Titusville, 2a., assignor to Struthers Wells-Titusville Corporation, .Titusville, Pa., a corporation of Maryland Application October 9, 1939, Serial No. 298,571

1 Claim. (Cl. 308203) This invention relates to a mounting for supporting a rotary drum such, for example, as are employed in connection with dryers or kilns for drying materials.

Drums of this character are usually supported for rotation on a plurality of supporting rollers, each of which is journaled by means of roller bearings on a shaft which is carried by standards, which mountings are diflicult to adjust for taking up wear on the parts and therefore involve considerable expense for repairs.

It is the object of this invention to provide a mounting for the supporting rollers of drums of this character in which the wear can be quickly and conveniently taken up and the supporting rollers can also be easily and conveniently adjusted relative to the drum so as to most effectively support the latter under all conditions.

In the accompanying drawings:

Fig. l is a fragmentary cross section of the lower part of a rotary drum supported by a mounting embodying the present invention.

Fig. 2 is a top view of this mounting.

Fig. 3 is an end elevation of the same.

Fig. 4 is a vertical cross section, on an enlarged scale, taken on line 4-4, Fig. 2.

Fig. 5 is a vertical longitudinal section, on an enlarged scale, taken on line 5-5, Fig. 2.

Fig. 6 is a fragmentary vertical section, similar to Fig. 4, showing a modification of the means for holding the shaft against turning on its standard.

In the following description similar reference numerals indicate like parts in the several figures of the drawings.

The numeral [0 represents the cylindrical body of a horizontal drum which is adapted to rotate about an axis which is arranged horizontally, or substantially so, and in which material may be dried in any suitable and approved manner. On its outer side the drum is provided with a plurality of tires I l which are spaced a suitable distance apart lengthwise of the drum and one of which is shown in Fig. 1.

The lower part of each tire of the drum 00- operates with a mounting whereby the drum is rotatably supported and also held against lengthwise movement and in its preferred form this mounting is constructed as follows:

The numeral l2 represents two supporting rollers or wheels which are arranged under the drum on horizontally opposite sides of its axis and each of which engages the upper side of its periphery with the adjacent part of the periphery of the tire and thereby rotatably supports the drum and the load of material which is being treated therein. Intermediate the supporting rollers the tire is engaged on its opposite lateral sides by two thrust rollers l3 whereby length- 3 wise movement of the drum is prevented.

The numeral I4 represents a base upon which the supporting and thrust rollers are mounted and which may rest upon any suitable foundation. Each of the thrust rollers is journaled on the upper end of an intermediate standard or post 15 so as to turn about a vertical axis and this standard is secured at its lower end on the central part of the base 14.

Each of the supporting rollers is journaled upon the central part of a horizontal shaft or axle it which extends with its oppositevends beyond opposite sides of the supporting roller. Between the bore of the supporting roller and the periphery of the supporting shaft is arranged a rolling bearing means which preferably comprises two inner bearing rings I 1 mounted on the periphery of the shaft so as to be capable of sliding lengthwise thereon and each provided on its periphery with a tapering or conical raceway l8 which inclines inwardly toward the companion inner bearing ring, two outer bearing rings l9 engaging opposite ends of the, bore of the supporting roller and each provided on its outer side with an inwardly facing shoulder 20 which engages with an outwardly facing shoulder 2| on the corresponding end of the supporting roller so this outer bearing ring is held against longitudinal movement toward the other outer bearing ring and also provided on its inner side with a conical or tapering raceway 22 which inclines inwardly toward the other outer bearing ring, and an annular row of bearing rollers 23 arranged between the raceways of each pair of inner and outer bearing rings and inclining inwardly at the same angle as the respective raceways.

The numeral 24 represents two standards, the inner sides of which engage respectively with the outer ends of the inner bearing rings and each of which has a cylindrical opening 25 which receives one end of the supporting shaft, as shown in Fig. 4. These standards are mounted on opposite ends of the base [4 so as to be capable of transverse and longitudinal movement thereon for which purpose the base is provided on its upper side with a fiat horizontal guiding and supporting surface 26 and each of the standards is provided on its underside with a flat horizontal face 21 which engages with and is slidable on the base surface 26.

For the purpose of taking up wear on the bearing rollers and the raceways the two standards may be moved toward each other, thereby v bringing the inner bearing rings together and causing any slack which may exist between the several members of these rolling bearings to be eliminated and the supporting roller to run without any looseness. The adjustment is preferablyproduced by means comprising a collar or head 28 arranged on one end of the shaft and engaging the outerside of thevadjacent standard and a plate or head 29 detachably connected with the other end of the shaft and engaging the outer side of the corresponding standard by bolts or screws 30. Upon tightening these bolts the two standards are moved together and slide or float the requisite extent on the base.

at all times between the shaft and the detachable plate 29 a plurality of shims or liners 3| are placed between this plate and the opposing end of the shaft; which members may be successively removed as the slack between the members of mounted on the standards and engaging with longitudinal keyways 4| in the shaft, as shown in.

Fig. 4,'or a Woodruf key 43 mounted on the shaft and engaging with a keyway 44in .the adjacent standard, as shown in Fig. 6.

In order to prevent undue lateral movement of the standards on the base, stops 32 are arranged on the base adjacent to the outer sides of the standards and adapted to be engaged by the latter. Means are provided for securing the standards to the base and also adjusting the same thereon so as to cause the supporting rollers and thrust rollers to engage with the tire of the drum in the required manner. For this purpose an adjusting and retaining device is provided for each of the standards which is constructed as follows:

On its underside each of the standards is'pro-1 vided with a longitudinal groove 33 which extends to the rear end of the standard while the front end of the standard is provided with a foot rear end is secured by a screw joint, or otherwise,-

to an anchoring block or bracket 31 which is secured to the base in rear of the respective standard by bolts 38. A screw nut 39 is applied to the threaded front end of the tie rod and tightened In' order to maintain a large area of metal contact against the outer side of the foot 3 4 and a set screw 42 is mounted on the upper part of the respective foot and engaged with the side of the rod 36 to hold the latter in place. shaft is adjusted to move the standards toward each other for taking up wear, the retaining rods 36 are deflected to some extent, this being possible due to these rods being sufliciently flexible and the grooves 33 having the requisite width to permit of such action. By mounting the standards so that the same can slide on the basein the manner described it is also possible for the supporting rollers to adapt themselves to the periphery of the tire.

By means of the screw nuts 39 the supporting rollers'may beadjusted so that their axes are the supporting rollers are arranged at a sufiicient' angle relative to the axis of the drum to counteract part of the thrust of the drum, which thrust,- however, is carried mainly by the thrust rollers on the base. I

I These means for mounting the drum are not only verysimple and durable in construction and capable of being manufactured at low cost, but it is also possible toeasily adjust the supporting rollers relative to the drum without disassembling any parts other than the plates at the outer ends of the supporting shafts. s

I claim as my invention;

A mounting for rotatably supporting a drum comprising a supporting roller adapted to engage said drum, a shaft having its central part arranged within said roller, a rolling bearing which is interposed between said roller and shaft and the wear upon which may be taken up by adjustment of parts of said rolling bearing relative to one another lengthwise of the axis of said shaft; standards arranged on opposite 'sides'of said-roller and supportingsaid rolling bearing on its'central part and one of said standards being rigidly connected with one end of said shaft and the other of saidtstandards being adjustably conne-cted'with the opposite end of said shaft, a base upon which said standards are 'freely slidable in a direction parallel with said shaft, each ofsaid standards "being provided on its underside with a recess, a flexible longitudinal adjusting rod ar-' ranged in the recess of each of said standards and rigidly connected at one end with said base and capable of movement at its'opposite'end in a direction parallel with the axis of said shaft, and means for adjustably connecting said last mentioned end of each adjusting rod with the respective standard.

'HARLAN WQHYOW.

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