本文引用节流气穴的试验结果,讨论了增加节流阀进出口压力差△p来提高节流阀刚度措施的有限性.从气穴观点出发,节流阀的进、出油口应该有明确的规定,(即应使液流为收缩流);锥形阀(包括锥形节流阀)锥角(?)的大小,在不同场合应做不同考虑,以尽量避免或减轻节流气穴产生. In this paper, the experimental results of throttling cavitation are quoted, and the limitations of the measures to increase the throttle stiffness by increasing the pressure difference Δp between the inlet and outlet of the throttling valve are discussed. From the viewpoint of cavitation, the inlet and outlet of the throttling valve should be clear (Ie, the flow should be the contraction of the flow); cone valve (including tapered throttle) taper angle (?) The size of different occasions should be done in different considerations, in order to avoid or reduce throttle cavitation as much as possible .