Condition monitoring and fault diagnosis of planetary gearboxes: A review

A theoretical and experimental investigation of modulation sidebands of planetary gear sets

In this paper, results of an experimental study are presented to describe the impact of certain types of manufacturing errors on gear stresses and the individual planet loads of an n-planet planetary gear set (n=3-6) The experimental setup includes a specialized test apparatus to operate a planetary gear set under typical speed and load conditions and gear sets having tightly controlled intentional manufacturing errors The instrumentation system consists of multiple strain gauges mounted on the ring gear and a multichannel data collection and analysis system A method for computing the planet load-sharing factors from root strain-time histories is proposed Influence of carrier pinhole position errors on gear root stresses is quantified for various error and torque values applied to gear sets having three to six planets The results clearly indicate that manufacturing errors influence gear stresses and planet load sharing significantly Gear sets having larger number of planets are more sensitive to manufacturing errors in terms of planet load-sharing behavior

An Experimental Study of the Influence of Manufacturing Errors on the Planetary Gear Stresses and Planet Load Sharing

http://ansol.us/Publications/KahramanKharaziJSV2003.pdf?origin=publication_detail

A deformable body dynamic analysis of planetary gears with thin rims

Load sharing behavior in epicyclic gears: Physical explanation and generalized formulation

In this paper, a state-of-the-art contact mechanics model of a planetary gear set is employed to study the effect of a number of manufacturing and assembly related carrier and gear errors on the load sharing amongst the planets Three different groups of errors are considered: (i) time-invariant, assembly-independent errors such as carrier planet pinhole position errors, (ii) time-invariant, assembly-dependent errors such as planet tooth thickness errors, and (iii) time-varying, assembly-dependent errors such as gear run-out errors With such errors present, planet load sharing characteristics of an n-planet system (n=3 to 6) is investigated for different piloting configurations under quasi-static conditions Load sharing behavior as a function of key manufacturing errors is quantified and design guidelines are proposed for better planet load sharing behavior

/pdf/influence-of-carrier-and-gear-manufacturing-errors-on-the-4sl5rnv7st.pdf

Influence of Carrier and Gear Manufacturing Errors on the Static Load Sharing Behavior of Planetary Gear Sets

Guda-1 influence of carrier and gear manufacturing errors on the static planet load sharing behavior of planetary gear sets(gear unit design and applications)

Ajit Bodas

Papers

Influence of Carrier and Gear Manufacturing Errors on the Static Load Sharing Behavior of Planetary Gear Sets

Guda-1 influence of carrier and gear manufacturing errors on the static planet load sharing behavior of planetary gear sets(gear unit design and applications)