### ANALYSIS OF THE INFLUENCE OF THE DIGGING POSITION ON THE LOADING OF THE AXIAL BEARING OF SLEWING PLATFORM DRIVE MECHANISMS IN HYDRAULIC EXCAVATORS

Vesna Jovanović, Dragoslav Janošević, Jovan Pavlović

DOI Number
https://doi.org/10.22190/FUME190225020J
First page
705
Last page
718

#### Abstract

The paper defines the general mathematical model of hydraulic excavators for determining the boundary and possible digging resistances and equivalent loads of the axial bearing of the slewing platform drive mechanism throughout the excavator’s working area. Using a developed mathematical model and program, in the case of a 100000 kg hydraulic excavator with a shovel manipulator bucket volume of 6,5 m3, a detailed analysis was performed to examine the influence of the position and digging resistance on the loading of the axial bearing of the excavator slewing platform drive mechanism. The results of the performed analysis show that the equivalent loads, relevant for the selection of axial bearing of the excavator slewing platform, occur in the zone of the working area when the kinematic chain of the excavator has positions in which the manipulator mechanisms have coordinated interaction when they can overcome the greatest resistance forces in the stable operation of the excavator.

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#### References

Jiaqi, X., Hwan-Sik, Y., 2016, A review on mechanical and hydraulic system modeling of excavator manipulator system, Journal of Construction Engineering, 2016, pp. 1-11.

Mitrev, R., Janošević, D., Marinković, D., 2017, Dynamical modelling of hydraulic excavator considered as a multibody system, Tehnički Vjesnik, 24, pp. 831-836.

Vujić, D., Lazarević, O., Batinić, V., 2017, Development of dynamic-mathematical model of hydraulic excavator, Journal of Central South University, 24, pp. 2010-2018.

Mitrev, R., Marinkovic, D., 2019, Numerical study of the hydraulic excavator overturning stability during performing lifting operations, Advances in Mechanical Engineering, doi: 10.1177/1687814019841779.

Hua, W., Peiyu, H., Bitao, P., Xuehai, G., 2017, A new computational model of large three-row roller slewing bearings using nonlinear springs, Proc. Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 231(20), pp. 3831-3839.

Smolnicki, T., Stańco, M., Derlukiewicz, D., 2013, Distribution of loads in the large size bearing - problems of identification, Tehnički vjesnik, 20(5), pp. 831-836.

Aguirrebeitia, J., Abasolo, M., Aviles, R., Fernandez, I., 2011, General static load capacity in slewing bearings. Unified theoretical approach for crossed roller bearings and four contact point angular ball bearings, 13th World Congress in Mechanism and Machine Science, Guanajuato, México 19-25 June, A19_362.

Krynke, M., Selejdak, J., Borkowski, S., 2013, Determination of static limiting load curves for slewing bearing with application of the finite element method, Materials Engineering - Materiálové inžinierstvo, 20, pp. 64-70.

Potočnik, R., Göncz, P., Glodež, S., 2013, Static capacity of a large double row slewing ball bearing with predefined irregular geometry, Mechanism and Machine Theory, 64, pp. 67-79.

Kania, L., Krynke, M., 2013, Computation of the general carrying capacity of slewing bearings, Engineering Computations, 30(7), pp. 1011-1028.

Wang, Y., Yuan, Q., 2014, Static load-carrying capacity and fatigue life of a double row pitch bearing with radial interference, The Journal of Mechanical Engineering Science, 228(2), pp. 307-316.

Jovanović, V., 2018, A contribution to the synthesis of the slewing platform drive mechanism of hydraulic excavators, PhD dissertation, (in Serbian), University of Niš, Faculty of Mechanical Engineering, 186p.

Kagoshima, M., 2013, The development of an 8 tonne class hybrid hydraulic excavator SK80H, Kobelco Technology Review, 31, pp. 6-11.

Joo, C., Stangl, M., 2016, Application of power regenerative boom system to excavator, 10th International Fluid Power Conference, Dresden, Group 10 - Mobile Hydraulics, Paper 10-3, pp. 175-184.

Li, W., Cao, B., Zhu, Z., Chen, G., 2014, A novel energy recovery system for parallel hybrid hydraulic excavator, The Scientific World Journal, 2014, Article ID 184909, pp. 1-14.

Jovanović, V., Janošević, D., Petrović, N., 2014, Experimental determination of bearing loads in rotating platform drive mechanisms of hydraulic excavators, Facta Univesitatis-Series Mechanical Engineering, 12(2), pp. 157-169.

Jovanović, V., Janošević, D., Pavlović, J., Petrović, N., 2014, Definition of directed digging force for assessment of the hydraulic excavator work, The 8th International Symposium - KOD 2014, Faculty of Tehnical Sciences, University of Novi Sad Slovak University of Technology in Bratislava International Federation for the Promotion of Mechanism and Machine Science – IFToMM Association for Design, Elements and Constructions – ADEKO, pp. 51-54.

Janošević, D., Pavlović, J., Jovanović, V., Petrović, G., 2018, A numerical and experimental analysis of the dynamic stability of hydraulic excavators, Facta Univesitatis-Series Mechanical Engineering, 16(2), pp. 157-170.

Jovanović, V., Janošević, D., Marinković, D., 2015, Determination of the load acting on the axial bearing of a slewing platform drive in hydraulic excavators, Acta Polytechnica Hungarica, 12(1), pp. 5-22.

Janošević, D., Jovanović, V., 2015, Synthesis of drive mechanisms of a hydraulic excavator, monograph, (in Serbian), University of Niš, Faculty of Mechanical Engineering.

Catalog thyssenkrupp Rothe Erde, Slewing bearings, 2007, GmbH D-44137 Dortmund.

Pavlović, J., Janošević, D., Jovanović, V., 2018, Optimization of a loader mechanism on the basis of the directed digging force, Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, doi: 10.1007/s40997-018-0236-z.

DOI: https://doi.org/10.22190/FUME190225020J

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