The first order linear non-homogeneous differential equation of brush wire wear with respect to time was constructed to explain the wear law of brush seals

and the mathematical model for calculating brush wire wear and wear rate was obtained. The effects of structure and operating condition parameters on wear and wear rate were numerically simulated

and the sensitivity of structure parameters to the influence of brush seal wear characteristics was also analyzed. The results showed that the maximum error between the experimental results and the calculation results of the brush seal considering wear effect leakage amount was 778% by the wear calculation result

proving the rationality of the calculation model. The final wear increased with the increase of brush wire diameter and angle

and the brush wire height and brush ring diameter had no effect on it. The initial wear rate increased with the increase of brush wire diameter and brush ring diameter

and decreased with the increase of brush wire height and brush wire angle. The sensitivity of the structure parameters to the total amount of wear was subject to brush wire diameter

brush wire angle

brush wire height and brush ring diameter.