Structural layout and operating parameters for a large rotor of a direct-flow bucket wheel type aggregator

Introduction. The problem of accelerating and cheapening the construction of roads without reducing their quality can be solved by creating a complex of continuous units. Units, following each other, carry out the whole complex of works aimed at the construction of roads. The use of satellite navigation opens up broad prospects for full automation of units. Therefore, the overall goal is to create a complex of units that carry out the continuous construction of roads, mainly in automatic mode. One of the devices that make up the continuous units is a direct-flow bucket wheel type aggregator. The use of direct-flow bucket wheel type aggregators for soil development is constrained by insufficient theoretical substantiation of their parameters. Before analyzing the interaction of the elements of the working bodies of a direct-flow bucket wheel type aggregator with the soil, it is necessary to clarify the structural layout for the rotor of a direct-flow bucket wheel type aggregator.

The method of research. Some design parameters of a direct-flow bucket wheel type aggregator are derived from logical reasoning. Other parameters of the direct-flow bucket wheel type aggregator are obtained by constructing schemes for the impact of the knife on the ground in the plane and spatial modelling. Initially, the rotor of a direct-flow bucket wheel type aggregator with a diameter of one meter was adopted for calculation.

Results. The circular and end knives are assigned the numbers № 1, № 2, № 3, etc. as it approaches from the periphery of the rotor to the axis of its rotation. On the basis of the adopted methodology, the design of the knife attachment, the front and back corner of the circular and end knives have been clarified. An extremely small distance from the axis of rotation of the rotor to the nearest point of the knife is established. Hence the conclusion is made that in addition to a large rotor, in conjunction with it, it is necessary to install a small rotor. The circumferential velocity of the blade of no. 1 circumferential knife and the angular velocity of the large rotor are determined. It is customary to arrange the knives in three rows, that is, the rows of knives around the circumference are deployed at an angle of 120° relative to each other. The feed on the end knife was revealed, that is, the thickness of the layer cut by the end knife.

Conclusion. On the basis of the adopted methodology, the geometric and mode parameters of a large rotor of a direct-flow bucket wheel type aggregator have been determined. An extremely small radius of location of the circular and end knives of the large rotor is established. To excavate the soil near the axis of rotation for the rotor of the direct-flow bucket wheel type aggregator, a small rotor with a higher angular velocity shall be coaxially installed. The direction of rotation of the small rotor shall be opposite to the direction of rotation of the large rotor in order to partially compensate for the reactive moment produced by the large rotor.

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