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Application of a Portable Device for Measuring Dragline Roller Circle Track Deviations and Roller Loadings.
Pallini-R; Rumbarger-J; Powell-D; Et Al
For Reference Only At Bureau Libraries :54 pages
The objective of this work was to develop and demonstrate an instrumentation system for measuring roller circle distortions and roller loads, and to develop methods for using elastomeric materials to reduce the loading on thrust rollers in walking draglines. A practical and portable device was developed and demonstrated on a walking dragline at the Falkirk Mine, Underwood, North Dakota. The device performed reliably and provided data on the vertical (out-of-flat) and angular twist or warp of each dragline roller track. This information can identify whether the upper rotating frame structure, the tub structure, or both are the source of distortions. The combined distortion data can be used to calculate realistic roller loads, predict track service life, and assist in evaluating the cost effectiveness of potential field repairs (elastomeric cushioning materials) versus costly track and tub replacement.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division