Load Capacity of Eccentric Roller Bearings

Eccentric roller bearings are commonly used in engineering and serve as actuating links in mechanical drives of various machines. Load capacity is one of the main parameters of such bearings. This paper presents possible kinematic schemes of an eccentric roller bearing and the specifics of the actual radial load distribution when it is applied to the driving ring between the rolling bodies. It is established that the load capacity of the eccentric roller bearing depends on the actual stress occurring when the rolling body of the minimal radius and the inner ring raceway are in contact. Equations are obtained for calculating the permissible radial load that the rolling body of the minimal radius with a raceway can bear. The limiting load is determined that satisfies the conditions of contact strength of the bearing’s assembly units and ensures performance of the bearing in a mechanical drive of a machine. The results of determining the limiting load of the eccentric roller bearing and the results’ analysis are presented using a specific example. To ensure the performance of the bearing, the optimal ratio of the inner ring radius to the minimum rolling body radius is determined.

References

[1] Sil’chenko P.N., Sinenko E.G. Podshipnik kacheniya [Roller bearings]. Author

[2] Volkov G.Yu., Kurasov D.A. Ekstsentrikovyy podshipnik kacheniya [Eccentric rolling bearing]. Patent no. 2315212 RF, 2008. 9 p.

[3] Volkov G.Yu., Kurasov D.A. Ekstsentrikovyy podshipnik kacheniya [Eccentric rolling bearing]. Patent no. 73045 RF, 2008. 2 p.

[4] Kraynev A.F. Mekhanika mashin [Mechanics of machines]. Moscow, Mashinostroyeniye publ., 2000. 903 p.

[5] Fedchenko E.M. Metody geometro-kinematicheskogo analiza i sinteza pro-stranstvennykh friktsionnykh peredach s zamknutoy sistemoy tel kacheniya. Kand. Diss. [Methods of geometric-kinematic analysis and synthesis of spatial friction gears with a closed system of rolling bodies. Cand. Diss.]. Kurgan, 2004. 254 p.

[6] Mesnyankin M.V., Mityayev A.E., Merko M.A. Geometricheskiye parametry ispolnitel’nykh ustroystv privodov tekhnologicheskogo oborudovaniya na baze mekhanizmov s zamknutoy sistemoy tel kacheniya [Geometric parameters of actuators drives of technological equipment based on mechanisms with a closed system of rolling elements]. Krasnoyarsk, SFU publ., 2013. 115 p.

[7] Mesnyankin M.V., Merko M.A., Kolotov A.V., Belyakov E.V. Features of calculation of nominal values of geometrical parameters of EMC. Problemy mekhaniki sovremennykh mashin. Problemy mekhaniki sovremennykh mashin. Mat. V mezhdunar. konf. [Problems of mechanics of modern machines. Proceedings of the V international conference]. Ulan-Ude, 2012, no. 1, pp. 89–92.

[8] Mesnyankin M.V., Mityayev A.E., Kolotov A.V. Geometrical parameters interdependency analysis of the rolling eccentric mechanism. Bulletin of KrasGAU, 2012, no. 11, pp. 180–184 (in Russ.).

[9] Syzrantsev V., Krokhmal N., Fedchenko Е. Geometrical synthesis of highspeed transmissions with close system of rotating links. Power transmissions 03. Conference materials, Bulgaria, Warna, 2003, рp. 362–367.

[10] Krokhmal’ N.N. Elementy strukturnogo sinteza, kriterii funktsionirovaniya i raschet osnovnykh parametrov friktsionnykh peredach s zamknutoy sistemoy tel kacheniya. Kand. Diss. [Elements of structural synthesis, criteria for functioning and calculation of the main parameters of friction gears with a closed system of rolling elements. Cand. Diss.]. Kurgan, 1989. 235 p.

[11] Volkov G.Yu., Kurasov D.A. Power design of the gear eccentric bearing in slider-crank mechanism. Handbook. An Engineering journal with appendix, 2010, no. 2, pp. 19–25 (in Russ.).

[12] Sharkov O.V., Zolotov I.A. Investigation of the stressed state of the outer cage of eccentric freewheeling mechanisms by the method of volumetric finite elements. Mashinostroitel’, 2006, no. 12, pp. 16–17 (in Russ.).

[13] Timofeyev G.A., Samoylova M.V. Stress analysis of Combined Planetary-Wave Gear with Generator of Waves of External Deformation. Herald of the Bauman Moscow State Technical University. Series Mechanical Engineering, 2010, no. 4, pp. 17–22 (in Russ.).

[14] Merko M.A., Mesnyankin M.V., Merko I.S., Mityayev A.E., Kolotov A.V., Kayzer Yu.F., Lysyannikov A.V., Lysyannikova N.N. Distribution static forces at the contact points of the links in the mechanisms with a closed system of rolling elements in the zone of minimum diameter. Modern problems of science and education, 2014, no. 6 (in Russ.). Available at: www.science-education.ru/120-15346

[15] Kurasov D.A., Volkov G.Yu. Power calculation gear eccentric bearing with a direct contact of external and internal rings. Vestnik Kurganskogo gosudarstvennogo universiteta. Seriya Tekhnicheskiye nauki, 2011, no. 1, pp. 10–13 (in Russ.).

[16] Chermenskiy O.N. Features of calculations for contact strength and durability of heavily loaded parts made of hardened steel on the example of rolling bearings. Vestnik mashinostroyeniya, 1998, no. 9, pp. 38–41 (in Russ.).

[17] Aleksandrov V.M., Romalis B.L. Kontaktnyye zadachi v mashinostroyenii [Contact tasks in mechanical engineering]. Moscow, Mashinostroyeniye publ., 1986. 176 p.