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建立了一种刷式密封的切片式三维模型,利用计算流体动力学(CFD)方法,计算了刷丝所受的气流力并将其简化为较少量的一系列的集中力.基于力矩平衡和线性叠加原理,提出了气流力引起的刷丝尖端力、转矩的一种定量计算方法.1台刷式密封实验台和1只实验刷环被用于相关理论计算的实验验证.基于上述理论计算,利用正交实验研究了刷丝长度、刷丝间隙、刷丝排数、安装角、刷丝直径和保护间隙对泄漏率、气流力、刷丝尖端力和转矩的影响.结果表明,总泄漏率及转矩的计算与实验结果基本吻合,各点误差均小于20%.刷丝直径、刷丝间隙、保护间隙及刷丝排数的对总泄漏率影响非常显著,安装角对转矩的影响非常显著.
A three-dimensional model of the brush seal was established, and the CFD method was used to calculate the airflow force of the brush wire and reduce it to a small amount of a series of concentrated forces.Based on the moment balance And linear superposition principle, a quantitative calculation method of tip force and torque caused by air flow force is put forward.A bench brush seal bench and an experimental brush ring are used in the experimental verification of the relevant theoretical calculation.According to the above Theoretical calculation, the orthogonal experiment was used to study the effects of wire length, wire gap, wire number, mounting angle, wire diameter and gap on the leakage rate, airflow force, wire tip force and torque. , The calculation of total leakage rate and torque basically agrees with the experimental results, and the error of each point is less than 20%. The influence of wire diameter, brush wire gap, protective gap and wire brush row number on the total leakage rate is very significant. The effect of torque is significant.