Compensating combined working body of road roller

Background: The issue of using vibratory machines for compaction of road construction materials is that during the vibration process, the energy of the vibratory drum is spent on useful compaction work only in the half-period of oscillations when the vibratory drum moves «downward». In the second half of the period, the oscillating vibratory drum moves «upward» and does not produce useful compaction work on the material. Thus, more than half of the energy spent on excitation of vibration is wasted, which increases energy costs and reduces the share of useful work of the vibratory machine.

Aim: Increasing the efficiency of using the vibration exciter energy for useful work.

Methods: From the point of view of increasing the share of energy expended by the roller on the work of compacting the material, it is necessary to reduce the «idle» component of the work on the «upward» motion of the vibratory drum. This principle is implemented in the following design: a vibratory roller contains a frame and a working element consisting of two rollers, the main vibratory roller and the additional compensating roller, articulated by means of a double-arm lever through a support and rotary device. During the compaction process, during that half-period of oscillations, when the vibratory roller moves upward, the force is transmitted by means of a double-arm lever, through a support and rotary unit, to the compensating roller, which moves downward and has a useful effect on the compacted material and compensates for part of the lost energy of the main vibratory roller.

Results: A scheme for modeling the impact on the supporting surface has been designed. Taking into account the constructed scheme, reasonable weight-and-dimensional characteristics of the original compensating combined working body of the road roller have been determined.

Conclusion: Based on the results of the dynamic analysis conducted in the study, the design features of the original working body of the road machine were determined, allowing identification of its reasonable weight-and-dimensional characteristics. The obtained results make it possible to analyze, in the first approximation, the design parameters for the development and production of domestic high-performance road equipment for the construction of highways and other transport facilities.