Zhyhula T.I. Features of dynamics of the load-carrying body of the belt tubular conveyor

Details

Parent Category: Geo-Technical Mechanics, 2019

Category: Geo-Technical Mechanics, 2019, Issue 147

Geoteh. meh. 2019, 147,191-198

https://doi.org/10.1051/e3sconf/201910900124

FEATURES OF DYNAMICS OF THE LOAD-CARRYING BODY OF THE BELT TUBULAR CONVEYOR

¹Zhyhula T.I.

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDK 622.647.2:681.5

Language: English

Abstract.

Tubular belt conveyors have been increasingly used in various industries for moving long distances of bulk load. The advantages of this type of conveyors, compared with belt conveyors of traditional design, include the possibility of transporting fine and hazardous materials along complex curvilinear routes without transfer stations, excluding their spillage and dusting. The belt of a tubular conveyor must meet specific requirements – possessing increased elasticity and flexibility to stably maintain the shape of the pipe, to withstand considerable loads at loading and unloading points. In order to choose a tape that meets these requirements, it is necessary to investigate the dynamic processes that occur in a tubular belt with a load during its movement. The tubular belt, when moving along the rollers of conveyor, makes transverse and torsional vibrations. The main danger is torsional vibrations, which are not limited by anything, and are excited due to the torques that occur when the belt is rolled into a pipe, when the conveyor belt is bent, when the support rollers are skewed, and when the belt is unevenly loaded. In the study of the torsion of a tubular conveyor belt on a straight section of the route the maximum twist angle of the tubular conveyor belt under the action of a time constant moment was determined. Also investigated the torsional vibrations of a tubular belt under the action of a suddenly applied moment. Studies of the torsional vibrations of the tubular belt showed that the torque applied suddenly to the cross section of the tape causes the section to rotate by an angle twice as large as in the case of static loading with the same moment. Relations have been obtained to determine the basic parameters of the tubular belt, which will exclude the possibility of a significant rotation of the cross section of the tape and the load spilling. The determining parameter for torsional vibrations of a tubular belt is the torsional rigidity of its section GI_p. The shear modulus of the conveyor belt G is small; the polar moment of inertia I_p for a section in the form of a cut ring is also small. Therefore, even small external torque loads can cause significant angular rotations of the section of the tubular belt. When choosing the belt material and the shape of its cross section, it is desirable that the shear modulus of the tape material and the polar moment of inertia of the cross section have as large values as possible.

Keywords: tubular belt conveyors, torsional vibrations of belt, torsional moment, torsional rigidity of the belt section.

 

REFERENCES

1. Dmitriev, V. G. and Egorov, A. P. (2011), “Influence of speed of belt on distributing force of resistance to motion of tubular conveyer”, Gorny informatsionno-analitichesky byuleten, no. 6, pp. 191–198.

2. Dmitriev, V. G. and Efimov, M. S. (2008), “Features of motion of belt of tubular conveyer on the area of route bend in a horizontal plane”, Izvestia vuzov. Mining Journal, no. 3, pp. 99–102.

3. Efimov, M.C. (2008), “The influence of the different factors on angle of deflection of the belt of tubular conveyer”, Gorny informatsionno-analitichesky byuleten, no. 8, pp. 235–237.

4. Babakov, I.M. (1968), Teoriya kolebaniy [Theory of vibrations], Nauka, Moscow, Russia.

 

About the authors

Zhyhyla Tetiana Illivna, Candidate of Technical Sciences (Ph. D), Senior Researcher, Senior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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