Allis-chalmers Corporation

Boliden Allis, Inc.

Raymond C Jenness

Carl A Roloff

Richard E Sabaski

David M Kjos

A rotary kiln having a material processing drum rotatably supported by a shaft. The shaft is rotatably supported by a bearing structure having a radial bearing and a thrust bearing. A radial bearing aligner and a thrust bearing aligner are provided for, respectively, aligning the radial bearing and the thrust bearing with the shaft of the drum if the shaft moves relative to the radial bearing and the thrust bearing.

Rotary kiln

A grinding mill apparatus is disclosed comprising a grinding mill having a feed end head and a discharge end head and a shell disposed between said heads and secured thereto for rotation with the head. A feed end bearing and a discharge end bearing are provided for supporting the feed end head and the discharge end head for rotation about a generally horizontal axis. The bearings include a bearing element which pivots with the heads with the amount of pivot proportional to the increase or decrease of charge level within the mill. A proximity probe is secured to a stationary surface and aligned with a target which is secured to the bearing. The proximity probe detects changes in gap size between the probe and the target and generates a signal indicating an increase in charge level or a decrease in charge level within the mill. The reading from the proximity probe together with a reading of power requirements for the mill indicate whether a charge level within a mill is approaching a maximum operating charge level for the mill.

Grinding mill apparatus

A radially extending scoop is fastened internally to the discharge end wall of a ball mill structure for rotation with the mill; rotation of the mill will cause the grinding media and pulp to cascade and the scoop will fill and direct the material inwardly toward the mill center and discharge it into a conical cylinder in the mill trunnion which directs the discharge into a receptacle.

Ball discharger for grinding mill

An apparatus for equalizing the radial load on the pivoted bearing pads of a journal bearing which comprises in excess of two pivoted bearing pads, say four or five pivoted bearing pads, for example. The journal bearing includes two bearing pads located in a generally central region relative to the span of the plurality of bearing pads in a circumferential direction, with the corresponding supports for the two bearing pads being radially fixed in position, and with the remaining bearing pads being mounted on supports which are radially adjustable. A mechanical adjusting means is pivoted for separately radially adjusting the support for each of the radially adjustable bearing pads, whereby to correspondingly, radially adjust the corresponding pivoted bearing pads. A separate source of high pressure oil is connected to the interface between each bearing pad and the journal, and a separate hydraulic pressure gauge is provided for each of said interfaces. The supports for the respective radially adjustable bearing pads are radially adjusted until an equalization is reached between the high pressure oil film pressures at the interfaces between all of the respective bearing pads and the rotating journal which is indicative that all of the bearing pads are carrying an equal radial load. It may be desirable under certain conditions to purposely provide a differential pressure setting for certain of the bearing pads at the time of initial adjustment whereby to obtain substantial equalization of radial load on all the bearing pads after operational equilibrium is reached.

Apparatus for equalizing radial load on plurality of pivoted bearing pads

A method of equalizing the radial load on the pivoted bearing pads of a journal bearing which comprises in excess of two pivoted bearing pads, say four or five pivoted bearing pads, for example. The method may be used, for example, in an arrangement in which two of the bearing pads located in a generally central region relative to the span of the plurality of bearing pads in a circumferential direction are radially fixed in position, with the remaining bearing pads being mounted on supports which are radially adjustable. The supports for the respective radially adjustble bearing pads are radially adjusted until an equalization is reached between the high pressure oil film pressures at the interfaces between all of the respective bearing pads (including the radially fixed bearing pads) and the rotating journal. This equalization of oil film pressures at the respective bearing pad-journal interfaces is indicative that all of the bearing pads are carrying an equal radial load. Instead of equalizing the oil pressures at the interfaces between all of the bearing pads and the journal, it may be desirable under certain conditions to purposely provide a differential oil pressure setting for certain of the bearing pads at the time of initial adjustment to allow for anticipated operational changes which may occur after operational equilibrium conditions are reached, whereby to obtain substantial equalization of radial load on all the bearing pads after operational equilibrium is reached.

Method of equalizing radial load on plurality of pivoted bearing pads

Reversible rotation grinding mills having a radially compartmentalized discharger with direction and volume control to laterally extending screens so as to obtain a constant 'cut' of material or slurry flow to stabilize the volume and size consist of the discharge.

Grinding mill trunnion discharger to opposite facing screens

An apparatus for equalizing the radical load on the pivoted bearing pads of a journal bearing which comprises in excess of two pivoted bearing pads, say four or five pivoted bearing pads, for example. In a preferred embodiment, the total number of bearing pads is an even number (4, 6, etc.) and the two centrally located bearing pads relative to the span of the plurality of bearing pads in a circumferential direction are radially fixed in position. The remaining bearing pads are mounted on supports which are radially adjustable. A mechanical adjusting means is provided for separately radially adjusting the support for each of the radially adjustable bearing pads. The supports for the respective radially adjustable bearing pads are radially adjusted until an equalization is reached between the high pressure oil film pressures at the interfaces between all of the respective bearing pads (including the radially fixed bearing pads) and the rotating journal. It may be desirable under certain conditions to purposely provide a differential oil pressure setting for certain of the bearing pads at the time of initial adjustment to allow for anticipated operational changes which may occur after operational equilibrum conditions are reached. When the total number of bearing pads is an odd number (5, 7, etc.), the support surface for the lowermost and centrally located bearing pad is radially adjustable, and two bearing pads symmetrically located about the lowermost bearing pad and having radially fixed support surfaces are used, one lying contiguous the lowermost centrally located bearing pad on either side thereof. The remaining bearing pads are radially adjustable.

Growing community of inventors

Milwaukee, WI, United States of America

Raymond C Jenness