BMG’s KZN field service team has been involved in a number of field service projects in the local sugar industry during recent off-crop seasons, as well as dealing with urgent breakdowns in sugar mills and refineries. A recent project was a turnkey in situ replacement of diffuser head shaft bearings and the complete refurbishment of the multi-misalignment couplings driving each end of the head shaft in an extremely tight timeframe.
“BMG’s design and installation team faced many challenges during this project, including the lack of engineering drawings required for the manufacture of replacement components. This meant bearing sleeves could only be finally machined after the extraction of components, some of which had been in operation for approximately 20 years,” says Chris Johns, regional manager. “Restricted space for moving enormous components, added to the difficulties of the project. Due to extended reach of the head shaft, it was not feasible to use the conventional approach of using mobile cranes. Instead, support structures were specially manufactured and placed under the 126 ton head shaft and used to jack the shaft up and out of the pedestals, allowing the team access to replace the 900 mm bore diameter bearings.”
A wide range of products, selected especially for the sugar industry, is available from BMG. These components include carrier and diffuser chain, knife and shredder bearing housings, custom sprockets and gear couplings, as well as steam gaskets, heat exchangers and hydraulic tools. Diffuser and mill gear boxes, in addition to mill lubrication and hydraulic systems, form a critical part of this range.
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