Proper coupling "conveys" a smooth ride
A
Lovejoy product story
Edited by the Engineeringtalk editorial team
Nov 26, 2003
The Lovejoy/Sier-Bath Farr gear coupling is designed specifically for the rugged requirements of high horsepower underground and surface belt conveyors.
The Lovejoy/Sier-Bath Farr gear coupling is designed specifically for the rugged requirements of high horsepower underground and surface belt conveyors, sometimes referred to as "alignment-free", which allows the gear drive to be mounted directly to the conveyor, eliminating the need for a foundation and a conventional low-speed shaft coupling.
The bolt-on design of the drive also lends itself to fast installations requiring no alignment.
The low-speed shaft bolts directly onto the conveyor shaft by means of Farr coupling on the two shafts.
Simple, piloted fits and bolt-on mounting connections eliminate the need for time-consuming alignment of both input and output shafts during installation and periodic maintenance - a profitable time-saver compared with conventional couplings.
In addition, the Lovejoy/Sier-Bath Farr coupling eliminates shaft misalignment as a cause of failure and downtime.
Even scheduled maintenance time and costs are reduced.
The improved reliability and reduced costs for heavy-duty conveyor systems helps maintain an effective system for moving high volumes of bulk materials in the mining, power generation, cement, bulk food processing and other industries.
Made from 4140 alloy steel, the coupling consists of a male and female piloted coupling assembled with Grade 8 bolts and Grade C prevailing torque nuts.
The 4140 alloy steel material provides the part with increased yield and tensile strength compared to conventional AISI/1045 material, commonly used in alternative gear coupling choices.
Ten sizes of the Lovejoy/Sier-Bath gear coupling offer a broad ranging torque capacity, from 10.7 to 870kNm, in standardised designs.
Lovejoy offers up to a 15in design size.
With this size range, smaller operations that move 225 to 450kg of media, such as a simple mixer drive in a baking operation, can benefit from this design, up to an aggregate operation moving tons of material every hour.
In another unique design move, the Lovejoy/Sier-Bath gear coupling provides a belt-and-suspenders provision in the form of a keeper plate, that is bolted on to the end of the shaft in the event the interference fit fails.
This keeper plate holds the assembly together long enough to halt operations and prevent potentially critical damage.
"If the coupling were to fall off the head shaft of a pulley, you are going to have anywhere from 3,000 to 20,000lb of motor/gearbox assembly material dump onto a worker or another piece of equipment", says Kevin Remack, Lovejoy Product Manager.
"Companies can safeguard their work force and protect their capital investments".
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