105. What are the reasons for the displacement of the main fan?
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105. What are the reasons for the displacement of the main fan?
1) When the main fan starts up or loses load, the direction of the axial force changes, and axial displacement occurs due to the gaps between the main thrust surface and the secondary thrust surface and the main shaft thrust disc. 2) Excessive axial thrust can cause the oil film to be damaged, leading to wear or melting of the tungsten carbide components, which in turn results in axial displacement. 3) An increase in the unit’s load causes elastic deformation in the thrust disc, as well as in the shaft bearing seats, shims, and bearing frames located behind them, due to the axial force; this also leads to shaft displacement.
1) When the main fan starts up or loses load, the direction of the axial force changes, and axial displacement occurs due to the gaps between the main thrust surface and the secondary thrust surface and the main shaft thrust disc. 2) Excessive axial thrust can cause the oil film to be damaged, leading to wear or melting of the tungsten alloys in the bearing shells, which in turn results in axial displacement. 3) An increase in the unit’s load causes elastic deformation in components such as the thrust disc, the shaft bearing seats behind it, the gaskets, and the bearing frames as a result of the axial force, and this also leads to shaft displacement.