Designing and characteristics analysis of electric suspensions with symmetrically arranged two slider-rods

An innovative design of electric suspensions was developed in this study to help realize slow active suspension easily and quickly.This design was driven by screw through double slider-rod arranged symmetrically as a substitute for two springs.Based on a mathematical modeling,suspension parameters were introduced for a certain type of wheeled vehicles.The functions and its mechanism in regulating terrain clearance and adjusting attitudes were subsequently explained respectively,together with its semi-active control mechanism and characteristics In conclusion,our data in the study show that the new mechanical design of suspensions not only could realize adjusting terrain clearance and static vehicle pose,but also had an ideal stiffness that could realize a semi-active suspension function through adjusting suspension＇s stiffness.Therefore it can bequite suitable for off-road wheeled vehicles and military wheeled vehicles.

20 MN高速复合传动压力机机身有限元分析

高速复合传动压力机已成为目前重要的锻造设备之一。本文建立了20MN高速复合传动压力机的整体三维有限元模型。针对其特殊的对称连杆驱动结构,对机身整体刚度的主要影响因素进行分析,为机身整体设计提供了理论依据。对压机进行静态有限元分析,得到了机身各部分等效应力和总变形的分布情况,确保机身的刚度和强度以及整体性指标达到使用要求,并且通过试验验证了其准确性。

基于对称双曲柄活塞驱动的空压机

由曲柄连杆机构驱动的普通活塞式空压机存在噪声、振动和缸体磨损等问题,提出双曲柄连杆机构驱动的活塞式空压机来解决这些问题;同时设计了基于对称双曲柄活塞驱动的二次增压双作用空压机和双级双作用空压机,提高了空压机的输出压力和流量,并可实现低压大流量和高压小流量的输出控制;降低空压机的振动和噪声,提高平稳性,降低活塞和气缸缸体的磨损,提高空压机的使用寿命。

三种对称多连杆式冲压机构传动特性对比分析

为改善对称多连杆式冲压机构的传动特性,对连杆和肘杆进行变异演化得到新的冲压机构。并对3种冲压机构进行了受力分析,通过理论推导,建立了机械利益与主要结构参数之间的关系。并通过数值分析,获得工作滑块位移和速度曲线、螺杆驱动扭矩曲线以及机械利益曲线。最后,通过对计算结果的对比分析,发现三角连杆方案在保持机械利益的同时,可提高工作节拍;而三角下肘杆方案不仅可提高工作节拍,还具有良好的速度均匀性。传动特性的对比分析结果可为3种对称多连杆式冲压机构的设计和选型提供参考。