2019-4-12

УДК 622 23.05 DOI: 10.21440/0536-1028-2019-4-106-113

Tauger V. M., Leontiev A. A. The calculation of heat exchange processes in the conveying pipe of a skip pneumatic winder. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal. 2019; 4: 106–113. DOI: 10.21440/0536-1028-2019-4-106-113

Introduction. The article considers thermodynamic processes in the conveying pipe of a skip pneumatic winder. Research aim is to analyse the establishment of temperature regime of pipeline’s operation and estimate the infl uence of air refrigeration on the velocity of a skip in the conveying pipe of a skip pneumatic winder.
Methodology. A mathematical model has been built of “mining blower–skip–lifting pipeline–surrounding media” system, which will make it possible to get the dependence of conveying medium temperature and loaded skip velocity on depth. The formulae are introduced to estimate pipeline wall heating and air refrigeration inside the pipeline. The ratio has been found, which makes it possible to determine the time of heating upon the expiry of which the process of heat exchange in the initial part of the pipe will be steady.
Results. The relevance of the problems has been justifi ed. Dependences of air-fl ow rate and air velocity in the pipeline on the vertical height coordinate are presented together with skip winding velocity variation conditioned by air fl ow refrigeration. The solution to the inverse problem is described: the calculation of air blowing station capacity required to provide the calculated value of average velocity, the results of which will allow to determine the value of mining blower capacity which provides for skip calculated average winding velocity, predetermined cycle duration, and unit capacity.
Summary. The ratios, obtained as a result of the calculation, make it possible to determine the value of mining blower capacity required to provide for skip calculated average winding velocity, predetermined cycle duration, and unit capacity.

Key words: winder; skip; pneumatic system; pipeline; heat exchange processes; mathematical model; mine winding.

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