Open AccessModernization of two-stage main fans at the end of the service life
Author(s) -
A. M. Krasyuk,
И. В. Лугин,
P. V. Kosykh
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/773/1/012047
Subject(s) - inlet , impeller , rotor (electric) , centrifugal fan , stage (stratigraphy) , service life , aerodynamics , mechanical fan , engineering , marine engineering , flow (mathematics) , airflow , mechanical engineering , mechanics , geology , aerospace engineering , physics , paleontology
The authors analyze air velocities in the inlet of the installation composed of two-stage axial fans (aerodynamic design OV-84 of the Central Aerohydrodynamic Institute) and in the inlet elements of the fan. It is shown that air flow is considerably nonuniform at the fan inlet, and the nonuniformity reduces in the air passage of the fan. The fan can be modernized by replacing the two-stage rotor by a high-rate single-stage rotor as per the inlet guide vanes– impeller–flow straightener design. This modification allows the required uniformity of air flow at the impeller inlet and ensures a longer service life of the rotor bearing assembly owing to considerable decrease n the weight of the rotor.