A planetary gearset is composed of sun gear, planet gears, ringgear, carrier and bearings. As the gearset is in motion undertorque, heat is generated at all sliding and rolling contacts forgear meshes and bearing surfaces as lubricant is supplied. Withoutlubrication the gearset cannot operate properly because all contactsurfaces are influended by heat and subsequent damages. On theother hand, excessive lubrication could cause a significant heatgeneration as churning or dragging losses increase. It is veryimportant to predict a right amount of lubrication required foreach component and to supply a necessary amount of lubricant in aneffective way. Empirical data of temperature increase inside aplanetary gearset at different inlet lubrication temperature,torque and speed are presented with physical explanation. It hasbeen attempted to utilize heat generation data as an indicator forrequired lubrication measure and also for gearset efficiencymeasure. Heat generation sources are classified to examine largestand smallest contributors and then project a better way toeffective lubrication for the planetary gearset. Some publishedgear efficiency equations are examined with power loss calculationsbased on gearset heat generations which are empirically measured inthe present study.
- Edition:
- 08
- Published:
- 10/01/2008
- Number of Pages:
- 17
- File Size:
- 1 file , 810 KB
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