Experimental determination of the parameters of the adaptive support of the power unit of the machine-tractor unit

Abstract

The research aim is to experimentally determine the parameters of the adaptive support of the power unit of the machine-tractor unit. The need to use adaptive supports for power plants of machine-tractor units is due to a change in their speed and load modes of operation in a wide range. The currently used supports have constant parameters, which are determined, as a rule, by statistical characteristics and characteristics of the nominal operating mode. Reducing the negative impact of vibration on the efficient performance of the power plant is proposed by creating supports with adjustable characteristics. Changes in the damping parameters of the used supports, depending on the modes of its operation, will reduce the vibration amplitudes of the power plant in the entire range of its operation, which will improve its performance indicators. The stiffness and damping coefficient were chosen as the determined parameters of the support. For this, experimental transition functions are fixed on a non-motorized stand, and they are approximated by solutions of differential equations of the first, second and third orders. The previously obtained curves are smoothed. The order of the differential equations depends on the type of transition functions and are selected according to numerical criteria. The adequacy of the obtained values is checked by comparing the experimental and theoretical curves. The scientific novelty lies in the methodological and technical diagnostics based on differential equations that was considered for agricultural units for the first time. The proposed methodology is of interest to engineers and technicians involved in the design of efficient supports for power plants of machine-tractor units.