The paper presents the kinetostatic analysis of the ratchet mechanism that acts on the conveyor, which is a part of solid organic fertilizer spreader, MGL-3, namely the reactions in the kinematic couplings as well as the driving torque in the mechanism drive coupling have been determined. The kinetostatic analysis of a mechanism is based on its kinematic analysis. In this respect, both the structural and kinematic analysis of the mechanism are necessary. Structural analysis allows determining the components that the mechanism is made of. Kinematic analysis provides us with the positions, velocities and accelerations of the application points of forces acting on the mechanism elements. The paper presents the hodograph of reactions in the mechanism drive coupling as well as the driving torque variation diagram. The research can improve the construction of the ratchet mechanism.
Agroinoculants are alternative products for the agrochemical products, their use reduces environmental pollution and contamination of food. The equipment for microbial inoculants application is designed to the modern technology of sowing and inoculating hoeing plants and vegetables, being used to apply a targeted suspension of bacteria inoculated in the best area for rhizosphere colonization for improve plants nutrition, protection, stimulation and soil structure. This paper presents the results obtained at the tests accomplished in laboratory conditions of the equipment for microbial inoculants application INOC, which has been designed, realized and tested at INMA Bucharest. Performing the laboratory tests it have been determined following qualitative working index: pump debit, nozzles debit, substance norms, stirring system efficiency.
Harvesting, preparation and conservation of hay is a frequent method for harvesting fodder from grasslands and forage crops, especially from the hill and mountain areas. The greatest losses of nutrients are obtained by traditional drying on the stubble of the hay. These losses are in the case of unfavourable weather even at 50 ... 60%, the drying time increasing to over 6 ... 8 days. This paper presents the results of the experimental researches achieved within a new technology for shortening the time from harvesting the clover to obtaining the hay at storage humidity. A pilot ventilation installation with a monitoring and control system for working processes was used to carry out the research. During the experiments, the parameters of the aeration agent were measured: temperature and humidity, as well as clover mass characteristics: humidity, temperature, drying uniformity.
The modern technologies for harvesting fodder for preservation are applied by using technical equipment that performs multiple operations (cutting, chopping, transporting) in a single pass, thus contributing to cost reduction and decrease of the losses during harvesting. Fodder harvesting for silage is mainly done with fodder harvesters, provided with harvesting equipment according to the operations in the technological process and fodder crop. This paper presents the experimental results obtained with a trailed fodder harvester on the main characteristics of the chopped material which can influence the quality of the silo: the chopping length of fodder plants and the uniformity of the chopping length. The process of compaction and air removal from the mass of chopped fodder are influenced by the chopping length of fodder plants and the uniformity of the chopping length, parameters realized by the chopping device of the harvesting equipment. In this paper a comparative analysis of the main types of chopping devices generally used on fodder harvesters was made and also the identification of their advantages and disadvantages, the quality of chopped material experimentally obtained for two types of harvested fodder (lucerne and vetch) and the energy consumption registered. The experiments were carried out in experimental fields at INMA Bucharest, with a trailed fodder harvester, in aggregate with an agricultural tractor of 58kW. The functional characteristics determined experimentally are summarized in tabular and graphical form and are useful to identify the best option for the chopping device and setting the operating mode depending on the characteristics of the culture to be harvested.
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