| 摘要 |
The principle of the solution consists in the fact that to a central part of a shaft (4) a reinforcement rib (6) is attached. The rib, mainly of rectangular cross section, is with its ends mounted to both inner faces of unbalanced pieces (5). The height of the longitudinal reinforcement rib ranges from 0.25 to 1.25 multiple of the shaft (4) diameter. The ratio of bending modules of the shaft (4) cross-section with the longitudinal reinforcement rib (6) and the shaft (4) is given by the following formula:Wo/Wo = [1+(Q x b) / 4 x (Pl + Q/2) x (1-b)] / Aγwhere:Wol - bending module of the shaft cross section with the longitudinal reinforcement rib (m<3>);Wo - bending module of the shaft cross section (m<3>);Q - centrifugal force of the longitudinal reinforcement rib (N);b - length of the longitudinal reinforcement rib (m);Pl - centrifugal force of one imbalanced piece (N);l - length of the shaft between the supports in bearings (m);A(γ) - ratio of decrement of maximum bending tension of the shaft.<IMAGE>
|
