OSCILLATORY ROLL OF THE ROAD ROLLER WITH A DOUBLE SIDE PLATE

Introduction. Soil compaction plays a crucial role in the construction of road foundations. The quality of this process is influenced by the type and modes of application of external force from the seal. The most effective is the vibrating machines’ compaction, which have a wide range of control parameters. Therefore, manufacturers are focusing on the production of multifunctional vibratory rollers. However, the driving force of the vibration exciter in such machines has a harmonic character, which does not allow the usage of such machines in cramped urban conditions and when compacting thin layers, due to large oscillation amplitudes. The purpose of the research is the development of an innovative design of the road roller vibratory working body, realizing not only  harmonic, but also oscillatory vibrations, which have a more ergonomic amplitude response. The article presents a sample of the working body improvement of an oscillator roll with double shell, showing the positive qualities of vibrating oscillatory and static road rollers, when thick layers are thickened or low - when thick layers are thickened and the contact pressure angle of rotation of the inner and outer shells require to achieve regulatory density. Such innovative technical solutions would significantly reduce costs and improve the quality of construction work.
Materials and methods. The calculated methods reveal the main parameters of the oscillatory vibration mechanism of the road roller. The technical characteristics of the road construction machine are investigated. The research is carried out on the grant basis of the Russian Foundation for Basic Research No. 18-48-550005 / 18.
Results. The results of research represent a new perspective design of the working body for the road roller and reduce the energy consumption of the road construction materials due to the possibility of the torsion vibrations’ moment of the same rotational frequency of the unbalanced rollers of the drum and simultaneously adjust the contact pressure by changing the surface of the roller. Therefore, such research allows to confirm the performance of the proposed technical solution. 
Discussion and conclusions. The proposed technical solution shows the positive qualities of rollers with an oscillatory vibration mechanism, and rollers with continuously varying contact pressures. The torsion vibrations, created by the oscillatory vibration mechanism of the roller, reduce the resistance to compaction of building materials due to the shear load transmitted from the roller to the material. These qualities contribute to improving the performance and energy efficiency of the  compaction process of building materials in road construction.

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