A METHOD FOR MODERNIZATION OF EXHAUSTED DOUBLE-STAGE MAIN FANS
A.M. Krasuk, I.V. Lugin, P.V. Kosykh
Chinakal Mining Institute of Sibirean Branch of Russian Academy of Science, Novosibirsk, Russia
Keywords: Вентилятор, рабочее колесо, вентиляционный канал, структура воздушных потоков, Fan, impeller, ventilation channel, structure of air flow
Abstract
Velocity field of air flow in the approach channel of main ventilation plant with fans of VOD series (aerodynamic scheme OV-84 TSAGI) and in the inlet unit was analyzed. It is shown, that there exists appreciable irregularity of flow in the inlet of fan, which decreases along the channel. Based on the analysis of velocity field of air flow, the method for the fan modernization, which consists in replacement of two-stage rotor by a high-pressure one-stage rotor made according to the scheme “inlet guide vanes - impeller - outlet directing vanes”, was justified. This allows to reach the performance objectives and increase the rotor bearing resource by considerably decreasing the weight of rotor.
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