真空吸附辊的密封特性研究

Sealing Characteristics of Vacuum Adsorption Roller

目的通过分析真空吸附辊密封模型中各结构参数对密封性能的影响,确定最合理且最适用于实际工况要求的密封结构。方法采用计算流体力学(CFD)方法对流体流动进行数值模拟,通过Gambit软件建立模型并划分网格,用Fluent软件对模型进行迭代,分析密封面的结构几何参数对密封特性的影响。结果以实际密封操作工况所要求的泄漏量作为衡量标准,且综合考虑极限压力条件和停车操作的影响因素,得知密封加工位置y=-3.2 mm、密封角度为0.04 rad时的结构最合理、最适用于实际工况要求。结论密封面的结构几何参数,如动静环密封角度、密封加工位置及气膜厚度等对开启力、泄漏量都有重要影响。

The work aims to determine the most reasonable and the most suitable sealing structure for the actual working conditions based on the analysis of the influence of the structural parameters on the sealing characteristics. Computational fluid dynamics （CFD） method was used for the numerical simulation of the fluid flow, and the models were established and meshed with Gambit. The effects of the structural geometric parameters of the sealing surface on the sealing characteristics were obtained by iterative analysis with Fluent software. With the leakage quantity required by the actual operating conditions for sealing as the yard stick, and comprehensively considering the limit pressure condition and the influencing factors on the parking operation, it is learned that the structure was the most reasonable and the most suitable for the actual working conditions when the sealing position y=-3.2 mm and the sealing angle was 0.04 rad. In conclusion, the structural geometric parameters of the sealing surface, such as the sealing angle of dynamic and static rings, the sealing position and the air-film thickness, etc., have significant impacts on the opening force and leakage quantity.