US1911171A - Supporting roller for revolving drums and the like - Google Patents

Description

May 23; 9 R. BERNHARD SUPPORTING ROLLER FOR REVOLVING DRUMS AND THE LIKE 3 Sheets-Sheet 1 Filed Dec.

INVENTOR: fiz'chardflernham? ATTORNEYS.

May 23, 1933.

SUPPORTING R. BERNHARD 1,911,171,

ROLLER FOR REVOLVING DRUMS AND THE LIKE Filed Dec. 12, 1930 3 Sheets-Sheet 2 WITNESSES INVENTOR: Richardfiernizard May 23, 1933. BERNHARD 1,911,171

SUPPORTING ROLLER FOR REVOLVING DRUMS AND THE LIKE Filed Dec. 12, 1930 3 Sheets-Sheet 5 WITNESSES IN VEN TOR:

' Rickard Bernhard,

@iw 2U. BY

TORNEYS Patented May 23, 1933 UNETED STATES PATENT OFFEQE RICHARD BERNHARD, OF ALLENTOXVN, PENNSYLVAN ASSEGNOR T0 ENGINEERING &, MANUFACTURING COMPANY, OF ALLENTOWN, PENNSYLVANIA, A

CORPORATION OF DELAWARE SUPPORTING ROLLER FOE REVOLVING- DRUIVIS AND THE LIKE Application filed. December 12, 1930. Serial No. 501,795.

This invention relates to supporting rollers for revolving drums and the like, such as those of rotary kilns, driers, coolers, grinding mills, etc. The object is to improve such devices in various ways, including re duction of friction, betterment of lubrication, and facility of assemblage, inspection, and repair. Other advantages that can be realized through the invention will appear from the description hereinafter of certain selected and preferred embodiments.

In the drawings, Fig. I shows an end view of a supporting roller and its mounting conveniently embodying the present invention, and also a fragment of the riding ring of the drum supported thereby.

Fig. 11 shows a vertical axial section through the roller and its mounting, taken as indicated by the line and arrows I l-11 in Fig. I.

Fig. III is a. side view of the mounting, with certain parts broken away and in section.

Fig. IV is a View at right angles'to Fig. III, showing the mounting in vertical axial section as indicated by the line and arrows IV-IV in Fig. HI.

Fig. V is a view corresponding to Fig. 1, illustrating a roller mounting of somewhat different construction.

Fig. V1 is a vertical sectional view similar to Fig. 11, taken as indicated by the line and arrows VLF-VT in Fig. V.

Fig. I shows a fragment of a rotary drum 10 and its riding ring, supported by a roller 11 which is mounted in a supporting frame structure 12 on a. base 13. As shown in Fig. II, the mounting structure or frame 12 is seated in a recess or depression in the base 13 and held fast by keys 14. The mounting 12 and the roller 11 may be adjusted transversely relative to the axis of the drum 10 by a set-screw 15 mounted in a post 16 removably fixed in the base 13,-the keys ll having first been loosened.

As shown in Figs. 1 and II, the roller 11 is a massive hollow steel casting with shouldered gudgeons 21, 21 projecting to either side and provided with tapered or conical bearing surfaces or races 22, 22 shrunk on their ends. The mounting frame 12 is a U- shaped unitary structure, with upstanding pedestals 23, 23 having tapered or conical bearings or races 24, 24 corresponding to the bearings 22, 22. Between corresponding bearings 22 and 24 are interposed rotary antifriction members 25, here shown as rollers. Preferably, the roller bearings composed of the parts 22, 24-, 25 are tapered, and these parts correspondingly conical. As shown in the drawings, the frame 12 is a casting with hollow pedestals 23, 23 interconnected by vertical webs 23a and also by a curved or dished web 26, which coacts with the pedestals to form a receptacle or pan for water or oil in which the support roller 11 may run, so as to lubricate the periphery of the roller, which makes cont-act with the riding ring of the drum 10.

As here shown, the pedestal hearings or races 24, 24 are mounted in cupped bearing boxes or aoapters 27, 27 which are mounted in corresponding circular openings in the pedestals 23, 23. These boxes 27, 27 have flanges 29, 29 at the outer sides of the pedestals 23, 23 and are secured and fixed in the pedestals by bolts 30 through the flanges 29, 29. As shown in Fig. 11, shims 31 may be interposed between the box flanges 29, 29 and the outer sides of the pedestals 23, 23, as a means of adjusting the pedestal bearings 24, 24: relative to one another, as hereinafter described.

To hold oil for lubricating the bearing, each box 27 has an upstanding lip or dam below the gudgeon 21, formed by an inward projecting or overhanging rim 32 around the gudgeon. This rim 32 is a separate annular member seated on the inner edge of the pedestal box 2'? and secured by bolts 33 extend ing through the from its outer side. The bottom or web of each box 27 has a lubricating valve device 34 through which oil or liquid grease can be introduced into the interior of the box, to form a bath therein practically up to the level of the inside of the rim 32. In operation, the oil or grease is carried up and runs back by gravity, so as to lubricate the races 2224 and the rollers 25 thoroughly, as well as the whole interior of the box 27. To prevent leakage of oil out of the boxes 27, 27, and ingress of dust and grit, there is a multiple annular tongue and groove joint between the roller 11 and the rim 32 of each bearing box 27. For this purpose, the lateral face of the roller 11 has annular ridges 35, 3G with an intervening groove, and the rim 32 has an annular groove 37 to take the inner ridge 35 and an annular tongue 38 to engage between the ridges 35, 36. An annular packing 39 of elastic material, such as felt, is inset in a groove in the tongue 38 to make contact with the bottom of the groove between the ridges 35 and 36. Thus a tight sealing engagement is assured at all times, without interference with slight relative movement of the boxes 27, 27 and the roller 11 for adjustment of the roller bearings at 25, 25.

In practice, the two pedestals 23, 23 can be bored and finished to fit the boxes 27, 27, and the outer sides of both pedestals faced off and finished, at one setting of the machine in which the work is done. Likewise, the circumference of each box 27 can be turned, the seat for its race 24 bored, and its inner edge and its flange 29 faced,and all these surfaces finished,at one setting of the machine in which this work is done. The gudgeon bearing seats at 21, 21 and the annular contact packing surfaces at 35, 36 can be turned and finished for both sides of the roller 11 at one setting of the machine; and the sur faces at both sides of each rim 32 can be turned, faced, and finished at one machine setting. Thus accurate alignment can be assured, as well as fluid and dust-tight contact at the oints between the box rims 32 and the roller 11.

In assembling the device, the annular rims 32 are first put in place, as shown, at either side of the roller 11, after which the inner bearing races 22, 22 are shrunk on the shouldered ends of the trunnions 21, 21. The roller 11 is then lowered into position between the pedestals 23, 23, and the rollers 25 with their cages are put in position, around the races 22, 22. Then the boxes 27, 27 with their bearing races 24, 24 are entered through their openings in the pedestals 23, 23 over the rollers 25, and are lined up with the rims 32, 32, and the bolts 33 are put in place and drawn up. Finally, the bolts are put in place and tightened up, until the supporting roller 11 cannot be turned,and the bearing rollers 25 are therefore jambed.

The narrow cracks or spaces between the outer sides of the pedestals 23, 23 and the box flanges 29, 29 are now measured or calibrated to determine the number and thickness of shims required. The bolts 30 are then loosened, and the necessary shims are put in place, together with an additional shim for clearance. The bolts 30 are again drawn up, and the roller 11 is tested for tightness. Just enough clearance is provided to allow the roller 11 to turn with perfect contact of the bearing rolls 25 with their races.

Figs. V and VI illustrate a supporting roller 41 of somewhat different construction, adapted for heavier duty than that shown in Figs. IIV. Except as hereinafter described, however, the construction is like to that of Figs. IIV, and is marked with the same reference characters as means of dispensing with repetitive description.

As here shown, the gudgeons for the roller 41 are not cast integral with the roller, but formed by a separate shaft 42 pressed into the roller, and having a shoulder 43 at mid length to cooperate with a corresponding shoulder in the bore of the roller, to assure correct endwise position of the shaft in the roller. The inner bearing races 44 are mounted on the ends of the shaft 42 and held in place by end cover plates 45 secured to the ends of the shaft by bolts 46, which are wired together as indicated at 47 to prevent them from working" loose. Oil rings 48 are interposed between the sides of the roller hub and the hearing races 44. The outer bearing races 49 are pressed into the annular outer box 50, and are kept from spreading apart by engagement with corresponding shoulders on the ring 51 and on a ring 52 at the outer end of the box. Removable end covers 53 allow the bearings to be inspected without dismantling the device.

In this construction, the bearings for the two ends of the shaft 42 are set up and adjusted independently of one another. The bearing box at the left of Fig. V1 is rigidly attached to the pedestal 23 by the bolts 30; but the bearing box 50 at the right hand side is left free to move laterally, to allow for expansion, although prevented from turning by a dowel pin 55 fixed in the pedestal 23 and extending through a corresponding hole in the box flange 29. Preferably, he pedestals 23 are open at the top, so that the roller 41 can be assembled with the bearing boxes 50, 50 and all other parts and the assembly lowered into the pedestals as a unit, and then secured by the bolts 30 and the pin 55.

Having thus described my invention, I claim:

1. A device of the character described comprising a support roller with its gudgeons, a mounting for said roller including pedestals apertured in correspondence with said gudgeons and spaced apart to pass the roller and gudgeons sidewise between them, and boxes engaged in the pedestal apertures around the gudgeons thereby locking the roller in the pedestals, and affording bearings for the latter and withdrawable outward to release the gudgeons for sidewise removal of roller and gudgeons.

2. A. device of the character described comprising a support roller with its gudgeons, a

mounting for said roller including pedestals apertured in correspondence with said gudgeons and spaced apart to pass the roller and gudgeons sidewise between them, bearing boxes engaged in the pedestal apertures around the gudgeons thereby locking the roller in the pedestals, but having their margins in dust-excluding relation with said roller, and also withdrawable outward and thereby releasing the gudgeons for sidewise removal of roller and gudgeons.

3. A device of the character described comprising a support roller with its gudgeons, a mounting for said roller including pedestals at opposite sides of the roller, apertured in correspondence with said gudgeons, boxes in the pedestal apertures around the gudgeons, containing bearings for the latter and withdrawable outward from outside the pedestals, rotary anti-friction members in said recesses, interposed between said bearings and gudgeons, and detachable overhanging rims for said boxes around said gudgeons, removable between the pedestals with the roller.

4. A device of the character described comprising a support roller with its gudgeons, a mounting for said roller including recessed pedestals containing bearings for said gudgeons, rotary anti-friction members in said recesses, interposed between said bearings and gudgeons, and detachable overhanging rims for said recesses around said gudgeons, in sealing engagement with the sides of said roller.

A device of the character described comprising a support roller with its gudgeons, a mounting including a pedestal at either side of said roller, apertured in correspondence with said gudgeons, a box in the aperture of each pedestal around the corresi ionding gudgeon containing a bearing for the latter and removable outward therefrom, but having a flange at the outer side of the pedestal whereby it is secured thereto, rotary anti-friction members interposed between said bearings and gudgeons, separate inward overhanging rims at the inner sides of said boxes around said gudgeons, and securing bolts for said rims extending through said boxes and removable from their outer sides, so that said rims may be detached from the boxes before removal of the boxes outward from the pedestals.

6. A device of the character described comprising a support roller with conical surfaced gudgeons, a mounting including a pedestal at either side of said roller, apertured in correspondence with said gudgeons, a box in the aperture of each pedestal around the corresponding gudgeon containing a conical bearing for the latter and having a flange at the outer side of the pedestal whereby it is secured thereto, rotary antifriction members interposed between said bearings and gudgeons, means coacting with said pedestals and said box flanges in adjusting the box bearings relative to the gudgeons, and yielding dust excluding packings between the box margins and the sides of said roller.

7. A device of the character described comprising a support roller with trunnions having oppositely conical bearing surfaces, a mounting including a pedestal at either side of said roller, apertured in correspondence with said gudgeons, a box in the aper ture of each pedestal having oppositely conical bearing surfaces corresponding to those of the corresponding gudgeon and a flange at the outer side of said pedestal, rotary anti-friction members interposed between corresponding bearings of said gudgeons and said boxes, one of said boxes being fixed to its pedestal, and the other havin antiturning connection to the edestal, but be ing free to shift axially relative thereto.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsyl- Vania, this 9th day of December, 1930.

RICHARD BERNHARD.

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