铁塔腿部采取 V 面设计的塔型一般都用在受力较大的转角塔和较高的直线跨越塔。由于 V 面计算与实物存在不同差异,设计单位通常不标注数据和加工尺寸,即使标注了尺寸也仅仅是为了估算材料重量而不能用作放样时的尺寸数据。因此,放样时...铁塔腿部采取 V 面设计的塔型一般都用在受力较大的转角塔和较高的直线跨越塔。由于 V 面计算与实物存在不同差异,设计单位通常不标注数据和加工尺寸,即使标注了尺寸也仅仅是为了估算材料重量而不能用作放样时的尺寸数据。因此,放样时还要计算实际准确的尺寸数据。塔腿 V 面放样的控制尺寸,其关键不在于计算过程而在于图面的分析是否恰当准确,本文介绍的分析过程可供铁塔设计和制作的参考。展开更多
This paper introduces a new study on the optimum calculation of partial transmission ratios of a mechanical drive system using a V-belt and a three-step helical gearbox in order to get the minimum size of the system. ...This paper introduces a new study on the optimum calculation of partial transmission ratios of a mechanical drive system using a V-belt and a three-step helical gearbox in order to get the minimum size of the system. The chosen objective function was the cross section dimension of the system. In solving the optimization problem, the design equation for pitting resistance of a gear set was investigated and equations on moment equilibrium condition of a mechanic system including a V-belt and three helical gear units and their regular resistance condition were analysed. From the results of the study, effective formulas for determination of the partial ratios of the V-belt and three-step helical gearboxes were introduced. As using explicit models, the partial ratios can be determined accurately and simply.展开更多
文摘铁塔腿部采取 V 面设计的塔型一般都用在受力较大的转角塔和较高的直线跨越塔。由于 V 面计算与实物存在不同差异,设计单位通常不标注数据和加工尺寸,即使标注了尺寸也仅仅是为了估算材料重量而不能用作放样时的尺寸数据。因此,放样时还要计算实际准确的尺寸数据。塔腿 V 面放样的控制尺寸,其关键不在于计算过程而在于图面的分析是否恰当准确,本文介绍的分析过程可供铁塔设计和制作的参考。
文摘This paper introduces a new study on the optimum calculation of partial transmission ratios of a mechanical drive system using a V-belt and a three-step helical gearbox in order to get the minimum size of the system. The chosen objective function was the cross section dimension of the system. In solving the optimization problem, the design equation for pitting resistance of a gear set was investigated and equations on moment equilibrium condition of a mechanic system including a V-belt and three helical gear units and their regular resistance condition were analysed. From the results of the study, effective formulas for determination of the partial ratios of the V-belt and three-step helical gearboxes were introduced. As using explicit models, the partial ratios can be determined accurately and simply.
