This paper presents a method of providing a virtual support for the rotor to assure the meshing stability of a pair of a pre determined spiral bevel gears in rotation.
On the basis of theory of fuzzy probability, a preliminary discussion is carried out on the predictive method of stability on cylindrical spiral compression spring.
根据模糊概率理论，对圆柱形螺旋压缩弹簧稳定性的模糊概率预测方法进行了探讨，并给出了实例。
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Seal chamber pressure of a new double spiral groove face seal working under high velocity and pressure conditions may probably be disturbed in operation, which affects the seal stability.