https://repository.utm.md/handle/5014/22549 2026-04-15T11:34:22Z https://repository.utm.md/handle/5014/23153 Определение параметров механического щупа садового культиватора с межствольной обработкой почвы РАЙКОВ, Виктор В статье рассмотрены теоретические основы определения параметров механического устройства для сигнализации наличия штамба (ствола) при работе поворотной лапы садового культиватора с межствольной обработкой почвы. Данна схема экспериментальной установки и описан принцип работы. Приведена циклограмма взаимодействия поворотной культиваторной лапы и механического щупа. Обосновано, что форма щупа может иметь простейший прямолинейный вид. Выполнен расчёт геометрических параметров щупа и возвратной пружины.; The article discusses the theoretical basis for determining the parameters of a mechanical device for signaling the presence of a bole (trunk) during the operation of a rotary paw of a garden cultivator with inter-stem tillage. The scheme of the experimental setup is given and the principle of operation is described. The cyclogram of the interaction of the rotary cultivator paw and the mechanical probe is given. It is substantiated that the shape of the probe can have the simplest rectilinear form. The calculation of the geometrical parameters of the probe and the return spring is presented. 2022-01-01T00:00:00Z https://repository.utm.md/handle/5014/23148 Влияние кинематических и конструктивных параметров на производительность агрегата для внесения минеральных удобрений в садах РАЙКОВ, Виктор В статье отражены результаты исследования по устойчивости работы агрегата для глубокого внесения минеральных удобрений в садах с пневматической системой подачи удобрений к рыхлителям. Приведена методика определения коэффициента технического использования агрегата и эксплуатационной производительности. Установлены влияющие факторы - диаметр тукопроводов и частота вращения вентилятора, а также диапазон их варьирования. Экспериментально произведена и теоретически обоснована оптимизация значений влияющих факторов для наибольшего значения эксплуатационной производительности.; The article discusses the results of a study on the stability work of the unit for deep application of mineral fertilizers in gardens with a pneumatic system for supplying fertilizers to rippers. The technique for determining the coefficient of technical use of the unit and operational productivity is given. Influencing factors were established - the diameter of the fertilizer ducts and the fan speed, as well as the range of their variation. The optimization of the values of the influencing factors for the highest value of operational performance was experimentally performed and theoretically substantiated. 2022-01-01T00:00:00Z https://repository.utm.md/handle/5014/23145 Justification of the dibber drill machines wheel parameters under the condition of rotation uniformity SERBIN, Vladimir; GHEORGHIŢA, Andrei The article presents theoretical and experimental study results of rotation uniformity for seed drill wheel and possibilities of using wheeled dibber drills in the design of sowing machines. The main purpose of research is to obtain mathematical models of wheel dynamic model expressing the dependence of wheel sliding on the technological and design factors. The objectives were to determine rolling coefficients in order to use their numerical characteristics in the analysis of wheel dynamic model and in particularity, the axial load, wheel radius, parameters of the dibber drills wheel and speed of movement. Freely rotating wheels with a rim width of 170 mm and diameters of 524 mm and 712 mm were used in the experiments. Soil in the channel was brought close by properties to the soil prepared for sowing. Measurement of the driving force was made by strain gauge equipment at a wheel speed of 0.47 m/s. The optimal axial load at the masses of 35-55 kg and diameter in the range of 500-800 mm of the wheeled dibber drills was determined. It was proved, that wheel slip within 10-12% will assure the quality of sowing crops technological process execution at speeds up to 3 ms-1. Numerical values of wheel sliding coefficients are on average 58% lower for rolled soil than for loose soil for equal conditions. 2022-01-01T00:00:00Z https://repository.utm.md/handle/5014/23140 Theoretical basics and technological characteristics of pork with typical syndromes NOVGORODSKA, Nadia; VERBYTSKYI, Sergii In the practice of meat processing, pork is often characterized by such syndromes as PSE (pale, soft, exudative), DFD (dark, firm, dry) and RSE (reddish-pink, soft, exudative). They worsen the perception of meats and have a negative impact on their technological properties in the production of meat products. In the total amount of pork used as raw material, meat with PSE and DFD syndromes features up to 50%. Studies have shown that PSE pork differed from quality meat (NOR) in a less elastic texture, the cut surface was soft, exudative, pale pink in color, and DFD pork was distinguished by a darker color. Compared to NOR meat, the pH value of pork DFD decreases during storage, while that of pork PSE increases. By appointing optimal feeding rations with the minimum necessary use of veterinary preparations, minimizing the causes of pig stress, choosing rational slaughter methods and regimens, it is possible to limit the impact of PSE syndrome and other common meat defects and improve pork quality. 2022-01-01T00:00:00Z