Patent GB-565835-A (GB)
Title: Improvements relating to rolling mills
IPC: B21B31/07
Filed: 1943-01-16
Abstract: 565,835. Rolling. BLISS CO., E. W. Jan. 16, 1943, No. 839. Convention date, Jan. 13, 1942. [Class 83 (iv)] [Also in Groups XXVI and XXXIV] Housings.-Rolling-mill rolls are journalled in chucks, mounted in windows in the housings, each comprising two separable members adapted to telescope together along co-operating surfaces, the inner member being a bearing sleeve engaging the roll neck. Thrust bearings are also provided and sealing means in conjunction with a lubricating system prevent ingress of cooling water, scale, &c. The chocks are in two parts 47, 65, Fig. 4, the part 47 sliding in the housing window and being keyed at 70 to the part 65 which forms the bearing for the part 57 of the roll neck. The two parts engage on a conical surface and are held in working relation by a series of studs 192, Fig. 7, in the part 47, passing through lugs 194 in the part 65 and carrying clamping nuts 196. A packing ring 72 seals the bearing surfaces of the parts. To effect separation of the parts, the nuts 196 are removed and the nuts 197 screwed against the lugs. When thrust bearings are required, these are provided by a member 90 mounted on a reduced part 92 of the neck and having a flange 96 engaging a groove in a ring 95 secured at 110 to a nut 100 screwing on a two-part threaded ring 102 mounted in a groove in the neck. The nut clamps the member 90 against a shoulder 93. Rings 80, 81 are attached to subsidiary rings 82, 83 having pockets in which pads 85 are resiliently backed up by washers made of material such as neoprene. The pads act on either side of the member 90 and the rings 80, 81 are held in the chock 47 by an end plate 152. Leakage of lubricant is prevented by a sealing ring 150 between the parts 95, 152 approached by labyrinth surfaces 155. A pair of reversely arranged sealing rings 150, Fig. 7, are mounted in a counterbore in the sleeve 65 and engage the roll neck. Ingress of water, scale, &c. is prevented by an annular sealing ring 160 with a packing ring 167 and held by springs 162 against the surface of an undercut groove in the roll. Lubricant is admitted by passages 130 in the chocks 47 leading to part-circumferential grooves crossconnected by lateral grooves in the sleeve 65 having passages leading to the bearing surface of the roll neck. The end of the journal is sealed by a ring 200 secured at 201 to the roll neck and engaging the sleeve 65 by packing 205. Oil discharged from the bearing is collected by passages 140 for removal. The thrust bearing has an independent oil supply at 120, the upper pads being lubricated directly by passages from the cross-channel 122, the lower pads being supplied by ducts 124, 125. Discharged oil passes by passages 142, 143 to the passage 140. In a modification, the sealing rings 150, 160 are replaced by annular channels connected for suction to an air pump, the approaches to the channels being guarded by labyrinth passages and an air inlet is provided to ensure sufficient flow to secure removal of any dirt that may pass beyond the labyrinth seal. The ring in which the channels at the roll end of the neck are formed is also provided with an outstanding drip ring to shed water clear of the bearing. When the rolls are removed from the housing, the sleeve parts 65 remain on the necks together with the sealing means, thus protecting the bearing surface during handling. The sleeve 65 is lined with soft bearing metal. The construction is stated to enable a roll neck of large diameter to be employed so that the neck and bearing strength approaches closely to that of the roll itself.