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一系列的研究表明,传统的小弹性模量非金属-钢摩擦轮机构设计完全不计接触区摩擦轮在半径方向的弹性变形,因此,部分非金属-钢摩擦轮机构实际传动比偏离设计值往往会达到不可忽视的程度。本文应用弹性力学理论,将非金属摩擦轮半径的弹性变形直接计入摩擦轮机构的实际传动比设计中,提出有关传动比设计的“两次逼近法”。计算及分析表明,利用该方法设计小弹性模量非金属-钢摩擦轮机构,可使其实际传动比十分逼近设计值。
A series of studies have shown that the design of the conventional small elastic modulus non-metallic-steel friction wheel mechanism totally does not account for the elastic deformation of the friction wheel in the contact region in radial direction. Therefore, the actual transmission ratio of some non-metallic-steel friction wheel mechanisms tends to deviate from the designed value Will reach the level that can not be neglected. In this paper, the theory of elastic mechanics is used to directly calculate the elastic deformation of the radius of the non-metallic friction wheel into the design of the actual transmission ratio of the friction wheel mechanism. The “double approximation method” of the transmission ratio design is put forward. Calculation and analysis show that using this method to design a non-metallic-steel friction wheel with a small elastic modulus can make the actual transmission ratio very close to the design value.