•  
  •  
 

Abstract

This article is dedicated to endurance testing of straight-tooth bevel gear reducers used in various machines, including cotton farming machinery. The choice of the test object is due to the fact that many machines require bevel gear transmissions for spatial arrangement of components. These gears enable the transmission of rotational motion between intersecting shaft axes within compact external dimensions. Additionally, bevel gear transmissions are the most common type of gear mechanisms after cylindrical ones.

For several objective reasons, straight-tooth bevel gears have gained wide use. Unlike cylindrical gears, they are more sensitive to manufacturing and assembly errors as well as to elastic deformations of transmission elements under load. When linear surfaces are in contact, errors in their relative positioning-shifts along and across the generating line of the teeth, as well as rotations around it-affect the tooth contact quality differently. While cylindrical gears react only to rotations relative to the generating line, bevel gears are sensitive to all errors associated with these shifts and rotations.

The article presents the theoretical basis for endurance testing, describes the test stand, and outlines the methods of testing. A test stand with four bevel gear reducers was chosen as the stand configuration. This setup offers high efficiency and minimizes time spent on adjustment work. Certain drawbacks inherent in multi-reducer stands were considered during the endurance tests, enabling reliable results. The tests employed specially developed plastic lubricants based on vegetable oil residues.

Based on theoretical considerations, the article reveals the unique aspects of endurance testing of reducers, allowing for better planning of such tests in advance.

First Page

72

Last Page

76

References

  1. Machines and Stands for Testing Parts/Edited by D.N. Reshetov. - Moscow: Mashinostroyeniye, 1979 – 343 pages, illustrated. (in Russian)
  2. E.P. Flik. Mechanical Drives of Agricultural Machines. - Moscow: Mashinostroyeniye, 1984. – 272 pages, illustrated. (in Russian)
  3. Effective Methods to Improve the Accuracy of Gear Engagements: Monograph / V.I. Kovalevskiy, U.M. Mamasobirov, Sh.A. Shoobidov. – Krasnodar: Publishing House – Yug, 2020. – 166 pages. (in Russian)
  4. N.K. Mishkin, M.I. Petrokovets. Friction, Lubrication, Wear. Physical Principles and Technical Applications of Tribology. – Moscow: FIZMATLIT, 2007. – 368 pages. (in Russian)
  5. Sh.A. Shoobidov. Machine Elements: Textbook. – Tashkent: "Asian Book House" Publishing, 2020. – 381 pages. (in Uzbek)
  6. Sh.A. Shoobidov. Calculation and Design of Machine Elements. Educational Manual. – Tashkent: “Innovative Development Publishing House and Printing”, 2021. – 542 pages. (in Uzbek)
  7. U.M. Mamasobirov, Sh.A. Shoobidov, V.I. Kovalevskiy. Compensation for Chain Gear Errors by Longitudinal Modification of the Sprocket Teeth // International Journal of Mechatronics and Applied Mechanics, 2021, Issue 9, 232-237. Available at Scopus.
  8. L.D. Chasovnikov. Gear and Worm Drives. – Moscow: Mashinostroyeniye, 1969. – 486 pages. (in Russian)
  9. V.I. Kovalevskiy, M.M. Kurganbekov, I.L. Samsonov. Stiffness of Elements in Bevel Gears and Tooth Contact Quality // Improving the Quality of Gears and Torque-Transmitting Parts of Agricultural Machines Using RK Profiles and Technological Methods for Improving Machining Accuracy: Abstracts of Industry Scientific-Technical Meeting, May 23-25, 1989. – Tashkent: Mekhnat, 1989. – Pages 22–23. (in Russian)
  10. V.I. Kovalevskiy, M.M. Kurganbekov, S.I. Nigmatullayev. Adjustment of Side Clearance in Bevel Gears by Changing the Axial Angle // Improving the Durability of Composite Materials, Assemblies, and Machines: Collected Scientific Works. – Tashkent: TashPI, 1989. – Pages 28–34. (in Russian)
  11. V.I. Kovalevskiy, M.M. Kurganbekov, U.X. Kuchkarov. Modernization of the Bevel Reducer 14XV39010 in Cotton-Picking Machines // Improving the Quality of Gears and Torque-Transmitting Parts of Agricultural Machines Using RK Profiles and Technological Methods for Improving Machining Accuracy: Abstracts of Industry Scientific-Technical Meeting, May 23–25, 1989. – Tashkent: Mekhnat, 1989. – Page 21. (in Russian)
  12. V.I. Kovalevskiy, S.V. Kovalevskiy. Increasing the Efficiency of Bevel Gear Reducers. – Krasnodar: Prosveshcheniye – Yug, 2011. – 311 pages. (in Russian)
  13. V.I. Kovalevsky. Spatial Adjustment of Bevel Bearings // International Conference on Motion and Power Transmissions. Nov. 23-26, 1991, Hiroshima.
  14. P.F. Dunayev, O.P. Lelikov. Calculation of Dimensional Tolerances. 4th revised and expanded edition. Moscow: Mashinostroyeniye, 2006. – 192 pages. (in Russian)
  15. N.G. Bruyevich, Y.E. Pravotorova, V.I. Sergeyev. Fundamentals of Mechanism Precision Theory. – Moscow: Nauka, 1988. – 238 pages. (in Russian)
  16. I.A. Bolotovskiy. Ensuring Full Contact of Teeth in Straight-Bevel Gears // Precision of Mechanisms and Machines: Proceedings of the Seminar on Mechanism Precision – Vol. 2. – Moscow: Publishing House of the USSR Academy of Sciences, 1952. – Pages 3–139. (in Russian)
  17. E.L. Ayrapetov, S.E. Ayrapetov, T.N. Melnikova. Calculation of Contact Stresses in Engaged Gears with Localized Tooth Contact // Vestnik Mashinostroyeniya. – 1985. – No. 12. – Pages 6–8. (in Russian)

Download

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.