Field studies of the supporting performance of an experimental vehicle on wet plowed soil

Introduction. Today crop production is one of the important components of the successful functioning of the country’s economy. The connecting link of all technological operations for cultivating agricultural crops is transport work, a large share of which falls on road freight transport. The existing models of trucks used in the agricultural industry perform a wide range of transport work, but with the low load-bearing capacity of the supporting surface caused by unfavorable weather conditions, its use in field conditions is limited, and in some situations it is completely impossible. In turn, the delivery of goods to the place of sowing and the removal of crops, respectively, in the spring-autumn period are one of the determining directions for the financial and economic stability of agricultural enterprises of any form of ownership. The solution to the problem of using cargo transport equipment on foundations with weak load-bearing capacity is to modernize existing equipment or develop new types and models of it, allowing it to perform the required technological operations on various soils and in all weather conditions, including work on the most difficult foundations – wet plowed soil. One of the possible directions for solving this problem is the development and use of automobile vehicles with a combined method of movement – rolling and walking, which allows you to choose it depending on the type of base and the load-bearing capacity of its supporting surface. To study vehicles with a combined method of movement, an experimental vehicle was designed that has original technical solutions that allow it to move by rolling and walking methods.

Оbject. The object of the study is the support patency of an experimental vehicle on wet plowed soil.

Materials and methods. The reference cross-country ability of an experimental vehicle on wet plowed soil was determined in the field when studying parameters – the amount of current consumed by the engines, the distance traveled, the depth of the rut, the degree of soil compaction. The parameters of support patency on wet plowed soil were studied with and without the use of original technical solutions incorporated into the design of the experimental vehicle.

Results and conclusions. Analysis of the results of field studies of the movement of an experimental vehicle using the rolling and walking methods on the base of wet plowed soil showed that: when moving by the rolling method, the peak current consumption indicators of the electric motors that ensure the forward movement of the vehicle at a load of 300 N amounted to 0.133 A, while when moving by walking amounted to 0.127 A; the depth of the track when moving by the rolling method is 2.5 cm at a load of 300 N, which is 2.1 times higher than when moving by the walking method, in which, at a load of 500 N, the depth of the track does not exceed 1.6 cm; the degree of soil compaction when moving by the rolling method with a load of 300 N is 1.114, while with the walking method of movement it is 1.077; at a load of 300 N, complete slipping occurs and the experimental vehicle gets stuck; forward movement using the rolling method is impossible without external forces, while movement using the walking method is also possible at a load of 500 N.

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