Advertisement

Study of Oscillating Process of Harp Screens

  • A. D. Bardovsky
  • A. A. Gerasimova
  • I. I. Basyrov
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

The paper presents the results of investigations on the mechanical characteristics of harp screens’ material influence on the screen separation technological parameters. The paper provided a mathematical model of a harp screens’ oscillating process depending on the length of their free area, on the process duty intensity, and on the screened material characteristics. This study found that the amplitude of the relative motion of the rubber strips under load relaxes with the increase of their free areas, and for steel cables, it increases, reaching a maximum at certain values of the technological load. It also had been established that the presence of the load drastically lowers the amplitude of relative motion of the rubber strips, especially in the zone of nondimensional frequencies of the order (0.6–1.4)g, while the amplitude of oscillation of the cable strings in this frequency range varies insignificantly. The use of the rubber-rope strips as working elements of the screening surface makes it possible to increase the “useful screen area” by enlarging the distance between the supports while maintaining high and stable amplitude of the vibration of the strips. The optimization of the mechanical characteristics of the working elements’ material of the harp screens and the conditions of their fixation, provide the intensification of the separation of the sized feed into fractions by eliminating the sticking of the deck plate by clay inclusions and the clogging by “difficult grains”, at the same time it substantially improves the technical and economic parameters of the screening process.

Keywords

Rubber strip Mechanical characteristic of strip material Metal cables Prestressing force of a strip Relative amplitude of strip’s oscillation Oscillation frequency of screen box Length of a free area of a strip Rubber-rope harp screen 

References

  1. 1.
    Vaisberg LA, Kartavyi AN, Korovnikov AN (2005) Sieving surfaces of screens. Constructions, materials, experience of application. VSEGEI, Saint PetersburgGoogle Scholar
  2. 2.
    Andreev SE, Perov VA, Zverevich VV (1990) Crushing, grinding and screening of minerals. Nedra, MoscowGoogle Scholar
  3. 3.
    Stoker JJ (1952) Nonlinear vibrations in mechanical and electrical system. Inostrannaya Literatura, MoscowGoogle Scholar
  4. 4.
    IaG Panovka (2015) Fundamentals of applied theory of oscillations and kick. LIBROKOM, MoscowGoogle Scholar
  5. 5.
    Tikhonov AN, Samarskii AA (2004) Equations of mathematical physics, 7th edn. Nauka, MoscowzbMATHGoogle Scholar
  6. 6.
    Kartavyi NG, Bardovskii AD (1985) Influence of parameters of rubber-rope harp screen on the screen separation technological parameters. News of the Higher Institutions. Min J 4-C:88–93Google Scholar
  7. 7.
    Kartavyi NG, Bardovskii AD (1989) Prospects for the development of high-efficiency classification-grinding equipment for non-waste production of non-metallic building materials. Collection of scientific papers Moscow Mining Institute: Problems of complex development of deposits of solid minerals. Nedra, Moscow, pp 115–128Google Scholar
  8. 8.
    Keropyan A, Gerasimova A (2017) Connection of the temperature in contact area of the wheel-rail system with the railway slope of industrial railway transport. Izvestiya Vysshikh, Uchebnykh Zavedenij. Chernaya Metall 60(5):355–363.  https://doi.org/10.17073/0368-0797-2017-5-355-363CrossRefGoogle Scholar
  9. 9.
    Bauman VA, Bykhovskii II (1977) Vibration machines and processes in construction. Vysshaia Shkola, MoscowGoogle Scholar
  10. 10.
    Goncharevich IF, Dokukin AV (1975) Dynamics of mining machines with flexible link. Nedra, MoscowGoogle Scholar
  11. 11.
    Bykhovskii II (1969) Fundamentals of the theory of vibration machines. Mashinostroenie, MoscowGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • A. D. Bardovsky
    • 1
  • A. A. Gerasimova
    • 1
  • I. I. Basyrov
    • 1
  1. 1.National University of Science and Technology “MISIS”MoscowRussia

Personalised recommendations