Product category:
Pulp and Paper Process News
News Release from: Renold Hi-Tec Couplings | Subject: Hi-Tec PM18 couplings
Edited by the Processingtalk Editorial
Team on 14 March 2003
Backlash free couplings on paper winder
The Renold Hi-Tec PM18 couplings in the drive train of a paper winder at a Scottish mill has eliminated backlash in the system and led to a dramatic reduction in instances of paper breakage
Paper breakages at Caledonian Paper of Irvine, Ayrshire, a large high quality paper producer in the UK, had become a recurrent problem The root cause was identified as the cumulative effect of mechanical wear and backlash in the winder drive gearbox gear and coupling, allowing the paper to 'snatch' as the winder decelerates
This article was originally published on Processingtalk on 23 Sep 2003 at 8.00am (UK)
Related stories
New specialist coupling for generator applications
Renold Hi-Tec Couplings has launched its new DCB-GS rubber in compression coupling; a zero backlash, very low maintenance unit designed for use in generator set and general diesel drive applications
Couplings for new anchor handling/supply vessels
Renold Hi-Tec Couplings has a contract for high performance DCB 838.0 rubber compression shaft couplings for marine propulsion systems to be installed in a fleet of anchor handling/tug supply vessels
Breakages not only result in lost production, but also cause considerable rework as quality control considerations permit only one breakage in any paper reel.
If a second breakage occurs the reel has to be fully rewound.
Caledonian Paper, in close co-operation with its maintenance contractor Wyko Industrial Services and the Renold Hi-Tec application team, decided to fit backlash free PM18 couplings to rectify the problem.
The decision was reinforced by a recommendation from the Caledonian sister plant, the Rauma Mill in Finland.
Rauma has also fitted PM18 couplings on its winders as well as PM180 and PM270 couplings to its refiner drives - with excellent results.
Thus in April 2002, their two JR 1000 winders were each fitted with four Renold Hi-Tec PM18 couplings.
Since that time the number of breakages have been considerably reduced, as has the coupling maintenance, with plant operation maintained around-the-clock.
The PM range of couplings is specially designed for heavy industrial applications up to 6000kNM, providing exceptional protection against severe shock loads and vibration.
Torque amplifications are eliminated through pre-compression of the coupling rubber elements while continuous operation is still assured even in the unlikely event of rubber failure or other damage.
The PM coupling requires no lubrication or adjustment.
The standard range comprises shaft-to-shaft, flange-to-shaft, mill motor coupling and brake drum coupling configurations.
Applications include metal manufacture, mining and mineral manufacture, pumps, fans, compressors, cranes and hoists, pulp and paper industry and general heavy duty industrial applications.
Due to the operational success of the PM18 couplings on the winder drives, Caledonian Paper intends to install Renold Hi-Tec couplings in other parts of its plant.
• Renold Hi-Tec Couplings: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
Search the Pro-Talk network of sites
