Numerical Investigation of Thermal Propagation in Industrial Mixer Drives - Assessment of Heat-Transfer Pathways and Gearbox Thermal Mitigation

Citation: Abhishek Varadanam Mekala, "Numerical Investigation of Thermal Propagation in Industrial Mixer Drives - Assessment of Heat-Transfer Pathways and Gearbox Thermal Mitigation", Universal Library of Engineering Technology, Volume 03, Issue 03.

Copyright: This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Heat generated by high-temperature processes can propagate axially through mixer shafts and into the seal, low-speed coupling, pedestal, and gearbox region. This study uses steady-state thermal finite-element analysis in SOLIDWORKS to quantify that propagation in two large industrial mixer configurations: a short-pedestal arrangement and a long-pedestal arrangement incorporating a spacer spool. Four configurations were evaluated. Case 1 represents the unmodified short-pedestal mixer, Case 2 adds a NEMA G-7 glass-silicone thermal isolation plate, Case 3 adds seal-lubricant cooling to the short-pedestal configuration, and Case 4 evaluates the unmodified long-pedestal configuration. Process temperatures from 250°C (482°F) to 400°C (752°F) were studied for the short-pedestal baseline and G-7 cases; the seal-cooled short-pedestal and long-pedestal configurations were extended to 500°C (932°F). The low-speed coupling (LSC) temperature was used as the principal drive-side metric and compared with an adopted 93°C (200°F) screening criterion representative of common industrial gearbox thermal limits. The short-pedestal baseline increased from 116.0°C (240.8°F) at a 250°C (482°F) process temperature to 170.3°C (338.5°F) at 400°C (752°F). G-7 isolation produced only a modest reduction, lowering the corresponding temperatures to 113.5°C (236.3°F) and 165.9°C (330.6°F). In contrast, seal-lubricant cooling held the LSC between 37.88°C (100.2°F) and 41.17°C (106.1°F) over 250-500°C (482-932°F). The long-pedestal baseline, without G-7 or seal cooling, maintained the LSC between 44.61°C (112.3°F) and 50.09°C (122.2°F) over the same 250-500°C (482-932°F) range. These results show that the dominant thermal-management mechanisms are localized heat removal near the seal and increased thermal path length/exposed area associated with the long-pedestal geometry, whereas passive G-7 isolation alone provides limited benefit when parallel metallic conduction paths remain.

Keywords: Industrial Mixer; Finite Element Analysis; Shaft Heat Conduction; Mechanical Seal Cooling; Thermal Management.

https://doi.org/10.70315/uloap.ulete.2026.0303010