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Some aspects of synthesis of linkage of complex structures

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 17 July 2018

Published on 03 July 2018

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Authors:

I. N. Matsyuk, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0002-0861-0933, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

E. М. Shlyahov, orcid.org/0000-0001-5983-9853, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O. I. Yehurnov, Cand. Sc. (Tech.),  Ana-Tems Ltd., Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. To study possible variants of assemblies of the fourth class Assur group consisting of four links and to evaluate their impact on operation of the mechanism containing this Assur group.

Methodology. The paper shows the results of theoretical study of possible assemblies of the fourth class Assur group in a jaw crusher in which both jaws move. The study was carried out with the help of the MathCAD software.

Findings. It is shown that the planar fourth class Assur group used in the jaw crusher features the following:

- only two assemblies are possible for conventional configuration of three-joint links against the frame;

- assembly mode significantly affects the quality of the crushing process;

- assemblies can be located very close, which can cause spontaneous transition from one assembly to another in heavily loaded mechanisms and result in an emergency situation.

Originality. It has been established that in the planar fourth class Assur group the number of possible assemblies does not exceed two. Very close mutual arrangement of assemblies is possible. Position functions of mechanisms with different assemblies differ from one another.

Practical value. The action algorithm is proposed. Used at synthesis of planar mechanisms of the fourth class, it allows evaluating their possible assemblies.

References.

1. Dvornikov, L. T. and Starikov, S. P., 2006. Kinematics and kinetostatics of the planar six-bar Assur group of fourth class. The Theory of Mechanisms and Machines [pdf], 1(4), pp. 61‒65. Available at: <http://tmm.spbstu.ru/7/dvornikov-starikov.pdf> [Accessed 23 April 2017].

2. Tuleshov, Е. А. and Drakunov, Yu. М., 2010. Vector Method Of Kinematic Analysis Of Third Class Mechanism [online]. In: Proceedings of The international scientific-technical conference “The 3-D Erzhanov’s Reading”, Aktobe, pp. 206‒209.

3. Matsyuk, I. M., Morozova, Т. I. and Shlyahov, E. М., 2017. Search of variants of assemblies of structural groups in planar linkages. Naukovyi Visnyk Natsionalnohо Hirnychoho Universytetu, 2, pp. 65–69.

4. Franchuk, V. P., Ziborov, K. A., Krivda, V. V. and Fedoriachenko, S. O., 2017. On wheel rolling along the rail regime with longitudinal load. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 3, pp. 62‒67.

5. Moldovan, C. E., Lovasz, E.-C., Perju, D., Modler, K.-H. and Maniu, I., 2015. On the Kinematic Analysis of the fourth class Mechanisms. In: Proc. of the 14^th IFToMM World Congress, Taipei, Taiwan, 25-30 October 2015, OS8-023 [pdf], 4, pp. 2447‒2453. Available at: <www.iftomm2015.tw/IFToMM2015CD/PDF/ OS8023.pdf> [Accessed 14 August 2017].

6. Moldovan, C. E., Perju, D., Lovasz, E.-C., Modler, K.-H. and Maniu, I., 2017. On the Kinematic Analysis of a Sixth Class Mechanism. Mechanisms and Machine Science, book series, 46, pp. 47‒59.

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