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在迷宫式气封中,由于转子-静子的干扰引起摩擦而产生的热量,部分被传导给转子和静子.部分通过对流由冷却空气带走,少量被辐射散出.热弹性随着转子和静子的温度上升而改变.如果由于状况变化而使得转子-静子的干扰消失,则热量就停止产生.另一方面,如果干扰加剧,则发热也增加,系统趋向不稳定并导致损坏.原则上,迷宫式气封的稳定性现象是热弹性的.本文完全着重于热的影响,文中规定了一个比较简单的准则,以供设计师快速检查迷宫式气封的热稳定性.在稳态和非稳态设计中都用了所规定的准则并且该准则成功地预示出稳定和非稳定状态.所讨论的一些影响参数为设计师提供了取得一种能稳定运行的迷宫式气封配置的指南.
In a labyrinth seal, the heat generated due to friction caused by the rotor-stator interference is partly transferred to the rotor and stator, and partly to convection by the cooling air, which is dissipated by a small amount by radiation. Thermoelasticity With the rotor and stator If the rotor-stator disturbance disappears due to a change in condition, the heat ceases to develop, and on the other hand, if the disturbance increases, the heat increases and the system tends to become unstable and cause damage In principle, the maze The stability of the gas seal is thermoelastic .This paper focuses entirely on the effects of heat, a relatively simple guideline is provided for the designer to quickly check the thermal stability of the labyrinth seal.In steady state and unsteady The required criteria were used in the design of the state and the criterion was successful in predicting the steady and unstable conditions.The parameters discussed discussed provided the designer with a guide to achieving a stable labyrinth seal configuration.