Bearings – Rotary bearing – Plain bearing
Patent
1999-05-13
2000-08-29
Hannon, Thomas R.
Bearings
Rotary bearing
Plain bearing
241236, 384397, 384419, F16C 3322, F16C 3310
Patent
active
061097926
ABSTRACT:
A combination stack tightener and journal bearing for a shear shredding or material processing apparatus includes a retaining ring fixedly mounted to an end of the shaft; a pressure disk slidingly positioned on the shaft between the retaining ring and the stack of cutter disks or material processing discs; a torque nut positioned on the shaft between the retaining flange and the pressure disk, where the torque nut includes an inner face facing the pressure disk, an outer face opposite the inner face, a central bore receiving the shaft therethrough, a plurality of axially extending threaded bores distributed about the central bore and extending completely through the torque nut, and a plurality of recesses formed into the outer circumferential surface of the torque nut; a plurality of jack screws threaded into the plurality of threaded bores, in through the outer face of the torque nut and out through the inner face, so as to force the pressure disk and torque nut away from one another, thereby securing the torque nut against the retaining flange and the pressure disk against the stack of cutter disks; and a plurality of inserts made of an abrasion resistant, self-lubricating material positioned within the recess and shaped such that a portion of each insert protrudes above the circumferential surface of the torque nut, thereby providing a bearing surface on the torque nut. Preferably, the solid, abrasion resistant, self-lubricating material is a polyamide resin material.
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