An improved method of passive thermal control has been proposed in order to operatively assess the technical condition of rolling bearings, based on studying the heating rate of a bearing. The values of the heating rate of ball, roller, and conical rolling bearings, as well as ball separators, have been determined empirically. It has been shown that the discrete limit heating rate values derived under the regular heating mode of mechanical reducers during stand tests are suitable for use as a diagnostic criterion for rolling bearings. Based on the heating speed criterion for mechanical reducers, it is possible to perform an operative assessment of the technical condition of rolling bearings of different types during the operation of equipment for different purposes. It has been established that for a rolling bearing in a working technical condition the heating rate under a regular heating mode does not exceed 1 °C/min. The resulting value corresponds to the diagnostic criterion for the heating rate of mechanical reducers in a working technical condition of ϑ n ≤1.1 °C/min. Using a diagnostic parameter of the heating rate under a regular heating mode makes it possible to resolve the issue related to the duration of control over the technical condition of a rolling bearing using a thermal method. Reducing the control procedure duration, when using the improved thermal non-destructive testing, by 4 times, would yield a reduction in operating costs due to the possibility of ongoing control over rolling bearings at the beginning of the equipment operation. It has also been confirmed that the heating rate of rolling bearings under a regular heating mode directly depends on their technical condition and does not depend on the load transferred and the mode of operation of the bearing nodes of the technological equipment. The proposed method could be applied in the maintenance system based on the actual condition of the equipment for the operative control over rolling bearings

An analysis was made of the types and characteristics of the influence of counterfeit products on human health, the main sources of their toxicological danger, and the state of legislative and regulato-ry documents regarding the technical conditions and requirements for the quality of dairy products in Ukraine and other countries, and the existing laboratory methods for determining their quality and safety. The necessity of introducing requirements for the types of analyzes in Ukraine into the existing regulatory documentation in the form of technical conditions is considered. It is proposed to introduce a new method of analysis to identify vegetable fat in falsified milk fat substitutes. It is proposed to focus on the composition of the sterol fraction, which highly depends on the nature of the fat: animal or veg-etable origin when evaluating the test results of dairy products. If the content of only milk fat in the sterol fraction should be only cholesterol. It is absent in vegetable fats, but other sterols are present: brassicasterin, campasterin, stigmasterol, β-sterol and others. Thus, the falsification assessment of the fat component of dairy products is established by comparing the obtained ratios of the mass fractions of methyl esters of fatty acids or their amounts with well-studied average indicators. For the practice of laboratories, it is more appropriate to determine the Reichert-Meissl number, which is one of the constants of the milk fat and characterizes the content of low molecular weight wa-ter-soluble volatile fatty acids in 5 g of fat. If for milk fat this number is from 20 to 37, then for vegeta-ble fats the Reichert-Meissl number is from 0.3 to 2.5 for corn and respectively 6-9 for coconut, 4-7 for palm kernel, 0.1-1.5 for palm fats. It is also possible to use another constant – iodine value. It charac-terizes the content of unsaturated acids in fat and makes it possible to distinguish milk fat from vegeta-ble. In this case, use the ratio of iodine number and Reichert-Meissl number, which for milk fat is 2.5, and for vegetable fats from 90.8 (palm) to 754.2 (sunflower). This technique can be effectively used to detect counterfeits of dairy products.

Одеська державна академія технічного регулювання та якості Збірник наукових праць ОДАТРЯ № 1(6) 2015 49 метров силовых электромеханических преобразователей, представляющих информационную значимость для диагностики. Введенные соответствующие классификационные признаки и представлена общая характеристика каждого метода.

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