鞣制过程中皮革在转鼓内的形变特征及受力分析
Deformation Mechanism and Force Analysis of Leather in Drum
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摘要: 研究了鞣制过程不同转速下皮革在转鼓中的形变和受力过程。首先将转鼓内皮革的复杂形变过程简化为圆到椭圆的周期性形变过程,建立了形变计算模型。随后通过可视化实验定量分析了转鼓内皮革的形变及受力情况,证明该模型具有合理性。此外,在鞣制初期使用高转速(如15 r/min),在末期使用低转速(如5 r/min),可使皮革保持较大的形变程度和推力,从而利于化学品的传质,提升鞣制效果,助力皮革行业节能增效。Abstract: The deformation and force-bearing processes of leather in drum during tanning were investigated under different rotating speeds. The complicated deformation process of leather in drum was first simplified to a periodic process from a circle to an oval, and the calculation model of deformation was established. Then the deformation and force-bearing processes of leather in the drum were quantitatively validated through visualization experimental data. It was proven that this model was scientifically sound. Moreover, using high speed (such as 15 r/min in this experiment) at the beginning of tanning and low speed (such as 5 r/min in this experiment) at the end of tanning can result in large deformation and pushing force of leather, thereby benefiting the mass transfer of leather chemicals and enhancing tanning performance. The obtained results are expected to improve the energy conservation of leather industry.