Research into usage efficiency of the pulsation machine with a vibrating rotor for milk homogenization

The modification of rotor-pulsation machine – pulsation machine with a vibrating rotor (PM with VR) has been researched in the work. Rotor in such modification not only rotates but also oscillates axially with the frequency about 3000 min-1 and amplitude 0,5–1,0 mm. The aim of this research was to define specific features of milk homogenization process in PM with VR and disperse characteristics of milk emulsion. Analytical researches resulted in finding dependence of milk emulsion acceleration as a main factor of milk fat particles breakup subject to the design and kinematic parameters of PM with VR. Experimental researches were carried out on the laboratory setup of the pulsation machine with a vibrating rotor which was designed by the authors. The subject of experimental researches is cow’s milk. The sizes of milk fat globules after homogenization were measured by the optical microscope equipped with a digital camera. The researches resulted in defining characteristics of milk emulsion dispersing in PM with VR. Thus acceleration grows when diameter, oscillation amplitude and rotation frequency of the rotor are increased, and channels length of the rotor and stator, the gap between them are decreased and the number of rotor openings is 4 or less. Empirical dependence between the average diameter of the fat globule (0,7–1,9 μm) and the average emulsion acceleration ((1–10)×103 m/s2) in the interrupter of PM with VR is defined which proves that the emulsion flow acceleration is the main cause of homogenization of PM with VR with 92 % confidence. High quality of the milk emulsion after processing in PM with VR has been proved. The crankshaft rotation frequencies up to 2880 rpm and rotor oscillation amplitude of 1 mm enable to receive milk emulsion with the average dispersion about 0,8 μm that corroborates using PM with VR in the industrial conditions for milk homogenization to be perspective

RESEARCH INTO USAGE EFFICIENCY OF THE PULSATION MACHINE WITH A VIBRATING ROTOR FOR MILK HOMOGENIZATION

The modification of rotor-pulsation machine – pulsation machine with a vibrating rotor (PM with VR) has been researched in the work. Rotor in such modification not only rotates but also oscillates axially with the frequency about 3000 min-1 and amplitude 0,5–1,0 mm. The aim of this research was to define specific features of milk homogenization process in PM with VR and disperse characteristics of milk emulsion.Analytical researches resulted in finding dependence of milk emulsion acceleration as a main factor of milk fat particles breakup subject to the design and kinematic parameters of PM with VR. Experimental researches were carried out on the laboratory setup of the pulsation machine with a vibrating rotor which was designed by the authors. The subject of experimental researches is cow's milk. The sizes of milk fat globules after homogenization were measured by the optical microscope equipped with a digital camera.The researches resulted in defining characteristics of milk emulsion dispersing in PM with VR. Thus acceleration grows when diameter, oscillation amplitude and rotation frequency of the rotor are increased, and channels length of the rotor and stator, the gap between them are decreased and the number of rotor openings is 4 or less.Empirical dependence between the average diameter of the fat globule (0,7–1,9 μm) and the average emulsion acceleration ((1–10)·103 m/s2) in the interrupter of PM with VR is defined which proves that the emulsion flow acceleration is the main cause of homogenization of PM with VR with 92 % confidence. High quality of the milk emulsion after processing in PM with VR has been proved. The crankshaft rotation frequencies up to 2880 rpm and rotor oscillation amplitude of 1 mm enable to receive milk emulsion with the average dispersion about 0,8 μm that corroborates using PM with VR in the industrial conditions for milk homogenization to be perspective

Снижение травмирования зерна при транспортировке

На основе проведенного анализа, можно отметить, что снижение механического повреждения семян – большой резерв повышения урожайности и сохранности зерна. В настоящее время целесообразно проведение исследований, направленных на снижение повреждения зерна при его загрузке, выгрузке и перемещении, поскольку проблема «травмирования зерна» существует, и использование оборудования с малой повреждаемостью зерна может дать значительный эффект по сокращению потерь в процессе переработки и хранения

Малогабаритна зернова дробарка для малих підприємств тваринницького напряму

Проаналізовано основні недоліки існуючих конструкцій дробарок для зерна

Аналіз параметрів ротора малогабаритної зернової молоткової дробарки

UK: Відомо, що при переробці фуражного зерна на корм тваринам найбільше застосовуються різні по конструктивному виконанню молоткові дробарки. При тонкому подрібненні ці машини ударної дії дають до 30 % пилоподібної (переподрібненної), а при грубому до 20 % недоподрібненої фракції. Крім цього, молоткові дробарки мають досить великі енерговитрати і при роботі.EN: Theoretical and experimental researches have defined a range of rational values of index linear rotor hammer relation in which destruction shock of weevil occurs most effectively due to energy utilization of relative oscillating hammer motion

Вдосконалення конструкції зернового сепаратора

В статі проаналізовано можливість модернізації зернового сепаратора барабанного типу. З метою покращення якості видалення домішок та зменшення механічних пошкоджень зернової маси розроблена конструкція гумових очисників решіт

ELABORATION OF THE RESEARCH METHOD FOR MILK DISPERSION IN THE JET-SLOT TYPE HOMOGENIZER

The competitiveness improvement of milk products is directly connected with a problem of decreasing energy consumption of the process of milk emulsion dispersion. At creating promising types of energy effective dispersers, a necessary condition is to elaborate a correct methodology for studying them that takes into account the specificity of the process of fat milk microemulsion dispersion. Based on the critical analysis of research methods for homogenizers of different types, there have been determined main directions of their improvement, taken into account in the elaborated research method for a promising jet-slot type milk homogenizer. The method of theoretical studies, including a choice and analysis of stable and changeable factors of the homogenization process in a jet-slot type homogenizer and optimization criteria, has been elaborated. The interconnection of technological, constructive, hydraulic parameters with a dispersion quality has been demonstrated. The influence of physical-mechanical properties of milk as a research object was taken into account. An optimal milk temperature was chosen for the studies. Factor variation limits have been substantiated. The constructive scheme of a chamber for the experimental homogenizer has been developed. At processing the experimental research methodology, the main stage was to develop an experimental set for studying the influence of changeable factors of the dispersion process on a homogenization quality. Dispersion quality estimation methods have been analyzed and the method of microphotography has been chosen with further computed analysis of obtained data. The elaborated methodology was used at studying the influence of cream fat and ring slot width on a dispersion quality in a jet-slot type homogenizer. The obtained data allow to determine rational parameters of cream fat – 40–50 % and slot width – 0.1 mm. The analysis of dispersed characteristics of the milk emulsion allows to make a conclusion about the high homogenization quality, comparing with processing in a valve homogenize

Машини та обладнання хлібопекарського виробництва: підручник

Різноманітні пристрої, створені людиною, можна розділити на дві великі групи. До першої відносяться пристрої, частини яких не можуть ро-бити рухів одна щодо одної, якщо не вважати незначних переміщень; до другої – пристрої, частини яких знаходяться в русі одне щодо іншого