Determining the efficiency of transmissions with jointed intermediate rolling bodies

The development of new energy efficient gear-operated equipment intended to work in spaces with limited radial dimensions is very important. The article investigates mechanical transmissions with intermediate rolling bodies having small radial dimensions and high load capacity. A design of the gear mechanism with jointed rollers and cams is proposed. In this design, sliding contact pairs are replaced with rolling contact pairs to reduce power losses. Using jointed cams provides the controlled engagement and reduced wear of work surfaces. These mechanisms are studied in detail. A technique for determining the theoretical efficiency of a gearbox with jointed rollers and the reduced coefficient of friction is developed. The technique takes into account the structure of the power losses in the transmission. The results of research make it possible to estimate the efficiency of the gear units with intermediate rolling bodies at the design stage and determine their reasonable geometric parameters.

References

[1] Industrial Gearbox and Gear Motors: European Manufacturers Are Challenged by Intense Competition and Low Margins. Finds Frost & Sullivan. Available at: http://www.frost.com/prod/servlet/press-release-print.pag?docid=262010347 (accessed 14 January 2013).

[2] Lustenkov M.E. Peredachi s promezhutochnymi telami kacheniia: opredelenie i minimizatsii poter’ moshchnosti [Transmissions with intermediate rolling elements]. Mogilev, Belarusian-Russian University publ., 2010. 274 p.

[3] Stanovskoi V.V., Remneva T.A., Kazakiavichus S.M. Peredachi so svobodnymi telami kacheniia, obzor patentnoi literatury [Transmission with free rolling bodies review the patent literature]. Progressivnye zubchatye peredachi: sbornik nauchnykh trudov [Progressive gears: collection of scientific papers]. Novoural’sk, NGTI publ., 2003, pp. 61–94.

[4] Lustenkov M.E. Planetary Ball Transmissions: Strength Calculations. Russian Engineering Research, 2010, vol. 30, no. 9, pp. 862–866.

[5] Nam W.K., Shin J.W., Oh S.H. Design of thin plate-type speed reducers using balls for robots. Journal of Mechanical Science and Technology, 2013, no. 27, pp. 519–524.

[6] Terada H., Masuda T., Yoshida S. Motion Analysis of a Reciprocating Motion Type Ball Reducer. Proceedings 12th IFToMM World Congress. BesanЗon, June 18–21, 2007, pp. 414–418.

[7] Bara M. Designing Aspects of Cylindrical Transmission. American Society of Mechanical Engineers Conference Proceedings. 5–10 November, 2006. Chicago, Illinois, 2006, pp. 75–81.

[8] Lustenkov M.E., Makarevich D.M. Planetarnye sharikovye peredachi tsilindricheskogo tipa [Planetary ball transfer cylinder type]. Mogilev, Belarusian-Russian University publ., 2005. 123 p.

[9] Ignatishchev R.M. Estafeta molodym — sin+shariki reduktor [Relay young — sin + balls gear]. Mogilev, MOUT im. S. Sobolia publ., 2011. 28 p.

[10] Pashkevich M.F., Pashkevich V.M., Pashkevich A.M., Chertkov S.V. Planetarnye kulachkovo-plunzhernye peredachi. Proektirovanie, kontrol’ i diagnostika [Planetary cam-plunger transmission. Designing, testing and diagnostics]. Mogilev, Belarusian-Russian University publ., 2003. 221 p.

[11] Lustenkov M.E., Komar V.L., Mashin Iu.V., Fittsova E.S. Issledovanie kinematiki i opredelenie KPD peredach s promezhutochnymi telami kacheniia [The study of kinematics and determination of the efficiency of transmission intermediate rolling bodies]. Gornaia mekhanika i mashinostroenie [Mechanics and Mining Engineering]. 2013, no. 2, pp. 77–89.

[12] Lustenkov M.E., Prudnikov A.P. Ispytaniia peredach s promezhutochnymi telami kacheniia [TESTforward rolling elements]. Tekhnika v sel’skom khoziaistve [Technology in Agriculture]. 2010, no. 5, pp. 32–33.