Experimental investigation of lubrication and cooling effects of high-speed rotating machines
Journal
International Journal of Advanced Manufacturing Technology
Journal Volume
35
Journal Issue
3-4
Pages
394-399
Date Issued
2007
Author(s)
Abstract
This study discusses the lubrication and cooling effects of high-speed rotating machines. The optimal channel design of the rotating test section with ribs will enhance cooling purposes. Therefore, the negative effects of thermal expansion and distortion of rotating elements are inhibited, thus decreasing the damage percentage of rotating machining tools, and improving processing precision and efficiency. To analyze the cooling behavior of the working fluid, the experimental conditions are required to fit the practical operating parameters of the high-speed rotating shaft. The experimental test analyzes axial and radial local Nusselt number distribution of the test section of the high-speed rotating cylinder. The experimental results show that Rib 4 case provides the best performance on the cooling area, showing a 20-40% removal of heat compared to that of the smooth wall. Given various fluid velocities (Reynolds number, Re) and buoyancy parameters (Grashof number, Gr), Rib 4 also achieves the highest cooling rate. Furthermore, we found that the larger the Re and Gr are, the larger cooling efficiency is. In conclusion, the experimental results provide some useful reference data for similar high-speed rotating lubrication and cooling problems. ? 2007 Springer-Verlag London Limited.
Subjects
Buoyancy
Cooling systems
Reynolds number
Thermal expansion
Cooling effects
High speed rotating machines
Rotating cylinders
Rotating machining tools
Lubrication
SDGs
Type
journal article