Reliability for design of planetary gear drive units

Ognjanović, Milosav; Ristić, Miloš; Živković, Predrag

doi:10.1007/s11012-013-9830-8

Cited by 15 publications

(8 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to its spatial configuration, planetary transmissions are complicated to model. Nevertheless, being one of the most critical components in several aerospace and energy generation applications, planetary modeling research is booming, partly due to these reliability concerns [3]. One of the main advantages of planetary transmissions is its compactness.…”

Section: Abstract Planetary Transmission á Meshing Stiffness á Transmmentioning

confidence: 99%

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

et al. 2015

View full text Add to dashboard Cite

This paper presents a planar spur gear planetary transmission model, describing in great detail aspects such as the geometric definition of geometric overlaps and the contact forces calculation, thus facilitating the reproducibility of results by fellow researchers. The planetary model is based on a mesh model already used by the authors in the study of external gear ordinary transmissions. The model has been improved and extended to allow for the internal meshing simulation, taking into consideration three possible contact scenarios: involute-involute contact, and two types of involute-tip rounding arc contact. The 6 degrees of freedom system solved for a single couple of gears has been expanded to 6 ? 3n degrees of freedom for a planetary transmission with n planets. Furthermore, the coupling of deformations through the gear bodies' flexibility has been also implemented and assessed. A step-by-step integration of the planetary is presented, using two typical configurations, demonstrating the model capability for transmission simulation of a planetary with distinct pressure angles on each mesh. The model is also put to the test with the simulation of the transmission error of a real transmission system, including the effect of different levels of external torque. The model is assessed by means of quasi-static analyses, and the meshing stiffness values are compared with those provided by the literature.

show abstract

Section: Abstract Planetary Transmission á Meshing Stiffness á Transmmentioning

confidence: 99%

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Planetary gears are operated in several fields such as wind turbine and hybrid automotive where the performance of the whole system particularly depends on the split unit. [1][2][3] Many researchers proposed numerical models of planetary gears in order to ameliorate its dynamic behavior [4][5][6][7][8][9][10][11][12][13] and to have a better understanding of the vibratory signature, allowing the development of more efficient fault detection and diagnostic techniques. [14][15][16][17][18] The variable speed and load are the main nonstationary conditions in which planetary gears are usually running.…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of the nonlinear planetary gear model in nonstationary conditions

Hammami

Mbarek

Fernández

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The nonlinear effects in gearboxes are a key concern to describe accurately their dynamic behavior. This task is difficult for complex gear systems such as planetary gearboxes. The main aim of this work is to provide responses to overcome this difficulty especially in nonstationary operating regimes by investigating a back-to-back planetary gearbox in steady conditions and in the run-up regime. The nonlinear Hertzian contact of teeth pair is modeled in stationary and nonstationary run-up regime. Then it is incorporated in to a torsional model of the planetary gearbox through different mesh stiffness functions. In addition, motor torque and external load variation are taken into account. The nonlinear equations of motion of the back-to-back planetary gearbox are computed through the Newmark- β algorithm combined with the method of Newton–Raphson. An experimental validation of the proposed numerical model is done through a test bench for both stationary and run-up regimes. The vibration characteristics are extracted and correlated to speed and torque. Time–frequency analysis is implemented to characterize the transient regime during the run-up.

show abstract

“…Bucket wheel excavators (BWEs) are high capacity machines operating in extremely harsh working conditions under the influence of loads of a pronounced dynamic nature. Experimentally and analytically obtained results of analysis of the dynamic behaviour serve as a foundation of modern methods for calculating structural stability (Cireş and Nani, 2016), as well as fatigue (Pietrusiak et al, 2017;Rusiński et al, 2017) and reliability (Karray et al, 2017;Ognjanović and Benur, 2011;Ognjanović et al, 2014) of bearing substructures and power transmission systems of BWEs. The approach to analysis of the dynamic behaviour of BWEs should be of a holistic nature, since analysis of individual subassemblies with disregard of their interaction with the rest of the dynamic system could lead to results which may not correspond to the actual behaviour of the construction (Schlecht, 2014).…”

Section: Introductionmentioning

confidence: 99%

The influence of incrustation and chute blockage on the dynamic behaviour of a bucket wheel excavator slewing superstructure

Gnjatović¹,

Bošnjak²,

Milenović³

2020

Journal of Theoretical and Applied Mechanics

View full text Add to dashboard Cite

Exploitation of bucket wheel excavators (BWEs) is accompanied by an increase of mass due to transport and adherence of a large amount of the material. Technical regulations do not account for the dynamic behaviour of BWEs. Such problems are analysed as quasi-static. A procedure and results of investigation of the influence of masses of the bucket wheel (BW) incrustation and soil in a blocked BW chute on the superstructure response are presented. Analysis of sensitivity of dynamic characteristics and the response to adherence of the material is conducted. The method and results can be used in the design stages of new and in reconstructions of obsolete BWEs.

show abstract

Reliability for design of planetary gear drive units

Cited by 15 publications

References 19 publications

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

Dynamic behavior of the nonlinear planetary gear model in nonstationary conditions

The influence of incrustation and chute blockage on the dynamic behaviour of a bucket wheel excavator slewing superstructure

Contact Info

Product

Resources

About