高转速下薄壁球壳应力应变分析

Stress and Strain Analysis of Thin Spheric Shell in High Speed

在球转子外面嵌套一个厚度为1～2mm的球壳,使延期解除保险时间为球壳转正时间与球转子转正时间之和,可以延长球转子最小解除保险时间。球壳上开有一圆弧形槽,在高转速下,开槽处与其保险件离心销相互作用,可能使球壳开槽处产生变形,从而影响球壳的解除保险运动。针对这一情况,利用有限元仿真软件ansys/ls-dyna对球壳的解除保险运动过程进行仿真,分析球壳开槽处应力应变。结果表明,球壳开槽处根部有微小变形,但并不影响球壳的解除保险运动过程。

Adding a spheric shell out of the ball rotor makes the delay arming time become the summary of the ball rotor and sphere shell reruing time. Then the arming time of ball rotor was prolonged. The thickness of spheric shell is only 1 to 2 millimeter. And a curved slot is grooved on its surtace. Distortion would occurred at the slot by the interaction between the slot and centrifugal pin in high speed, which may affect the arming process. Baesd on this, arming process of spheric shell is sinmlated by finite element software ansys/ls-dyna, and the stress and strain analysis of the slot on spheric shell is made. The resuhs indicate that the root of slot on spheric shell has little distortion, which can and affect the releasing insurance process.