Tissue manufacturers are continually challenged to achieve higher levels of productivity and quality. As a result, operators often work with conditions such as higher machine speeds and lower sheet moisture levels that increase the probability for developing chatter. A machine experiencing chatter often leads to lost production, increased maintenance, and capital expenditures.
Currently, operators rely on detecting the presence of chatter when sheet defects occur by observing the characteristic periodic marks that form in the Yankee coating. In severe cases where the vibration energy is high enough, the doctor blade can penetrate through the coating making direct contact with the Yankee dryer surface – resulting in costly damage.
Avoiding this state requires detecting the onset of chatter and alerting operators of the impending negative condition. To address this, Nalco partnered with SKF®, a supplier of condition monitoring equipment, to develop an early chatter warning system. The technology is based on indirect doctor blade vibration monitoring using a customized user-friendly intuitive software module.
An overview of the monitoring technology is presented along with case studies that illustrate benefits and knowledge building this tool offers for improved asset management.
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