旋回流气爪流场特征的数值分析

基于在旋回流气爪腔体内增设绕流柱的设计方案,采用数值方法分析气室内旋回流的形成、发展过程,进一步明确了气爪内部的流场特征、压力分布规律及其吸附原理。数值计算结果表明:增设绕流柱后,可改善气爪内部和被吸附工件表面的压力分布趋势,增加吸附力,提高吸附稳定性;提高供气量,会导致旋回流的流速增加,强度提高,负压程度和吸附力也相应增大。

Numerical Analysis on the Flow Characteristics of Vortex Gripper

Based on the design of adding the inner rotating cylinder in the vortex gripper, the numerical method was adopted to analyzing the formation and development process of rotating flow in the gripper, and then the flow characteristics, pressure distribution in the gripper and its adsorption theory were further clarified. The numerical results showed that： After adding the inner rotating cylinder, the pressure distribution trend in the gripper and on the surface of workpiece was improved. Besides, the adsorption force and stability were also increased; Increasing the supply amount of gas will lead to the rising of rotating flow velocity and intensity, and the value of negative pressure and adsorption force accordingly become bigger.