Erosion Behavior On A Big-sized Centrifugal Fan

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Paolo Saccenti - Boldrocchi S.r.l. Riccardo Beretta - Boldrocchi S.r.l. Several production processes contain the usage of turbomachinery for the transport of gases with high concentrations of strong particles. Centrifugal fans employed in clinker manufacturing operate underneath extreme erosive circumstances. To restrict the erosive wear of particular fan zones, put on-resistant plates are used. This paper presents a numerical investigation of the erosion conduct of a large-sized axial vs centrifugal fan fan working in a cement manufacturing unit. A contaminant characterization is carried out to outline particle form, dimension distribution and physical traits (i.e. density) on which the particle model is based. In addition, the floor analysis and microstructural characterization of the weld-deposited hardfacing alloy present the wear-resistant coating features. Particles are tracked with a Lagrangian method on the instantaneous stream fields corresponding to totally different relative impeller-to-volute positions. The particle impact angle is found to have a significant affect on the erosion of fan surfaces. CFD predictions are in close agreement with on-subject erosion detections.

The outdoor sensor measures the dew level and the temperature of the surface air. From a dew point difference that may be set with the change S1 (dew level of the outside air lower than the dew point of the room air) the relay picks up and the fan begins to ventilate.

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Possible approaches to reducing mass and quantity embrace the usage of mechanical gears that increase the pace and lower the torque necessities of the machine. This, nonetheless, results in increased noise, increased maintenance, and decreased reliability. Another to mechanical gears that doesn't have these limitations is magnetic gearing. ]. Integrating magnetic gears into the machine construction avoids the necessity for a separate gearbox. There are quite a lot of approaches to integrating the gear into the machine.