Failures and Failure Prevention of Paper Machine Components, 1994 Engineering Conference Proceedings

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Paper machine technology is subject to constant improvements in an effort to increase production rates. Despite the continuing advances in this field, failures in paper machine components including Yankee dryer, press rolls, suction rolls, and dryer cans, do occur. These failures relate to a variety of different causes including design, casting and fabrication deficiencies, and also service related deterioration. Whatever the cause, a failure in one of these components can endanger plan personnel. In addition, because these components are usually long “lead-time” items, a failure can result in substantial lost production.

This paper describes the various mechanisms leading to failures in paper machine components, the program used to determine those mechanisms, and the corrective measures which can be used to prevent future failures.

Productivity improvements will also be discussed resulting from re-rating of rolls to higher pressures. Where re-rating has been accomplished successfully, the resulting higher productivity rates have paid for the costs of upgrading within 4 to 6 months of the upgrading.