Özet:

The results of research into the schemes of serial connection of capillaries – pressure dividers, both two­ and multi­capillary, were presented, with a linear dependency of change in inter­throttle pressures on supply pressure. Based on the analysis of the results, the schemes for multi­range pressure setting devices are built – a cascade connection of dividers and with binary ramification of pressure dividers. For each of these schemes, the corresponding setting of dimensions of passable capillary channels can set such pressure drops in capillaries, at which the division pressure coefficients will vary by several orders of magnitude and remain constant. The designed schemes provide one direction and proportionality of all inter­throttle pressures (drops) of a scheme when changing the input supply pressure, but the scheme with binary branches of dividers enables setting the drops of pressures at the level of pascal particles. The built four­decade device for setting the drops of pressures was explored by the obtained mathematical models under the action of impact factors (change in supply pressures of the setting device, temperature of throttled gas) on the coefficients of division. It was found that the influence of pressure changes in the designed scheme is practically absent while the temperature change of the gas flow by ±5 K does not exceed 0,2 %.Application of the tools of pressure reproduction, based on the designed schemes, opens up the prospect of building high precision devices for one­stage preparation of complex gas mixtures with micro­concentrations of components, the devices for setting low and micro­rates of gases, as well as for testing the tools for measuring pressures. Author Biographies Ihor Dilay, Lviv Polytechnic National University Bandera str., 12, Lviv, Ukraine, 79013 Doctor of Technical Sciences, Associate Professor Department of Automation of Heat and Chemical Processes

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