Development of large-scale contra-rotating axial fan for mine auxiliary ventilator with circular plate blade profile
Abstract：Large-scale contra-rotating axial fan for mine auxiliary ventilation FBD-No7.5/2 × 55 （impeller diameter： 0. 75 m, rated speed ：2 970 r/min,2 stages, single stage power：55 kW） were developed to meet the mine demand of large air flow and long distance. The blade die-formed with common hot-rolled sheet steel is in circular plate profile, which has simple process with low cost, no static and non-aging. This study combines theory analyses with experi- ments, solving the problem of easy blade fracture of high-speed and large-scale fans by enlarging auxiliary thickness of the blade root through finite element method analyses. After testing,the air flow of this fan is up to 15.83-10. 66 m3/ s, total pressure, 1 331-7 454 Pa, efficiency of total pressure ,82.64% , A-weight specific sound level, 13.92LsA（dB） , and its aero-dynamic performance effect is better than that of industry standards. Filed testing shows that the fan runs safe and reliable, and that the function can meet needs of users.
Keywords：contra-rotating axialauxiliary ventilatorcircular plate bladeaero-dynamic performancefinite element method
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1227-1232 )