| 摘要 |
A shaft of mine centrifugal fan of main ventilation with stages and transitions between those is characterized in that transitions between stages in flow-through section of fan to decrease concentration of stresses are arranged as elongated cones, elongation of those is performed due to decrease of lengths of stages and is related with relation , where - difference between the initial and changed length of stage of larger radius; - difference between the initial and changed length of stage of smaller radius; r1 - radius of larger stage of the shaft; r2 - radius of smaller stage of the shaft; A - correction difference between the mass of the cone and fillet equal to , where a= -(a1+a2); h=r1-r2; d1= , d2=r21+r22+r1r2+a2-3ax0+3x20, and - total length of stages with larger and the smaller radii and transition between those, - initial length of the smaller stage, - initial length of the larger stage, r - fillet radius, x0 - abscissa of center of curvature of fillet.
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