耐磨环/泵壳密封环

耐磨环，又称泵壳密封环，是安装在离心泵蜗壳中的精密加工环形部件。它与叶轮耐磨环形成受控的运行间隙，以最小化内部再循环泄漏，保持水力效率，并保护主泵壳免受磨料磨损和侵蚀。这些环是牺牲性部件，设计用于定期更换，以延长昂贵泵壳的使用寿命。

工作原理是在静止和旋转部件之间建立精确的径向间隙（通常为0.1-0.5mm）。该间隙产生迷宫密封效应，限制流体从高压排出区回流到低压吸入区。耐磨环吸收来自叶轮接触、热膨胀和泵送流体中磨料颗粒的径向磨损，防止对主泵壳结构造成损坏。

Works by establishing a precise radial clearance (typically 0.1-0.5mm) between stationary and rotating components. This clearance creates a labyrinth seal effect that restricts fluid leakage from the high-pressure discharge zone back to the low-pressure suction zone. The wear ring absorbs radial wear from impeller contact, thermal expansion, and abrasive particles in the pumped fluid, preventing damage to the primary casing structure.