| Citation: | ZHAO Huan, LIU Wei, SUN Dan, et al. Experimental study on tribological performance between bristles and coating material pairs of brush seal[J]. Journal of Aerospace Power, 2025, 40（5）：20220805 doi: 10.13224/j.cnki.jasp.20220805
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The experimental identification model of brush seal friction coefficient based on cylindrical circumferential friction was established, and the tribological performance experimental devices of brush seal wire and coating material pairs were designed and built. Two bristles materials, nickel-based bristles GH4169 and cobalt-based bristles GH605, and four coating materials, WC, Zr2O3, Cr2O3 and Al2O3, were designed and processed. The positive pressure, friction force, friction torque, friction coefficient and wear between friction pairs were experimentally studied, and the tribological properties of different bristles and coating materials were comprehensively evaluated. The results showed that when the coating was WC, considering the positive pressure, friction force and friction torque of bristles and the coating material pair, the cobalt base bristles was superior to the nickel base bristles, and the friction coefficient of the nickel-based and cobalt-based bristles and the coating material pair was approximately the same. When the coating was Zr2O3 and Cr2O3, considering the positive pressure of bristles and the coating material, the cobalt-based bristles were better than the nickel-based bristles. Considering the friction force, friction torque and friction coefficient of bristles and coating material, nickel-based bristles were better than cobalt-based bristles. When the coating was Al2O3, considering the positive pressure, friction and friction torque of bristles and the coating material, the cobalt-based bristles were better than the nickel-based bristles. Considering the friction coefficient of bristles and coating material, the nickel-based bristles were better than the cobalt-based bristles. The wear rate of nickel-based bristles was about 6 times that of cobalt-based bristles. Under the precondition of protecting the rotor surface coating, when the rotor surface coating was WC, Zr2O3, Cr2O3, Al2O3, the nickel-based bristles were better than the cobalt-based bristles.
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