为了提高油罐车自主加注臂前端快接装置的密封性能,设计了一种内胀式橡胶密封圈,并结合响应面法和有限元法对密封圈进行了优化和分析。首先,基于有限元软件ANSYS Workbench对密封圈进行建模和仿真,研究了密封圈的倒圆半径、厚度和压缩量对密封圈性能的影响;然后,将密封圈与管壁的接触面积、接触压力和所受等效应力作为优化目标,利用Design-Expert软件建立了密封结构的优化模型,并通过多目标优化获得最优设计方案;最后,进行了密封圈优化前后的性能对比和分析。数值测试表明,在最大3 MPa 介质压力下,优化后密封圈的接触压力提升了1.3 MPa,有效接触面积更大,且接触带更加集中,有利于实现快接装置和油罐车加注口的有效密封,同时等效应力降低了4.3%,有助于延长密封圈的使用寿命。
Abstract
In order to improve the sealing performance of the front-end quick connect device of the autonomous refueling arm of oil tank trucks, an internal expansion rubber sealing ring is designed, and the sealing ring is optimized and analyzed using response surface method and finite element method. Firstly, based on the finite element software ANSYS Workbench, the sealing ring is modeled and simulated, and the effects of the rounding radius, thickness, and compression amount of the sealing ring on its performance are studied.Then, taking the contact area, contact pressure, and equivalent stress between the sealing ring and the pipe wall as optimization objectives, an optimization model of the sealing structure is established using Design-Expert software, and the optimal design scheme is obtained through multi-objective optimization. Finally, the performance of the sealing rings before and after optimization is compared and analyzed.Numerical tests have shown that under a maximum medium pressure of 3 MPa, the contact pressure of the optimized sealing ring has increased by 1.3 MPa, resulting in a larger effective contact area and a more concentrated contact zone, which is conducive to achieving effective sealing of the quick connect device and the tank opening of the oil tank truck. In addition, the equivalent stress has been reduced by 4.3%, which helps to extend the service life of the sealing ring.
关键词
自主加注臂 ;
橡胶密封圈 ;
有限元分析 ;
响应面法 ;
密封性能
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Key words
autonomous refueling arm ;
rubber sealing ring ;
finite element analysis ;
response surface method ;
sealing performance
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