论文部分内容阅读
圆环链是承受非常复杂而重载荷的受力构件。随着煤矿机械的使用性能的提高,对圆环链的要求也越来越高。目前选用圆环链的方法,一般只根据圆环链的整体破断负荷大小,与工作载荷进行比较而选用的。显然,对链环这样曲率较大的曲杆来讲,这种计算方法的结果是不会令人满意的。而通过链环的有限元计算,可更精确地了解链环各部位的位移和应力情况,可确定破坏部位,进而有可能提出进一步改进链环的形状和尺寸,提高承载能力的依据。一、研究对象及单元的划分“煤炭部标准MT36—80”矿用高强度圆环链”规定,目前我国圆环链规格有7种。其中,φ18×64规格使用最广泛,因此仅对中18×64规格的圆环链做有限元计算。φ18×64圆环链链环的形状、尺寸、整体坐标及单元的划分形式如图1所示。
Circular chain is to withstand a very complex and heavy load force components. With the improvement of the performance of coal mine machinery, the requirements for the circular chain are also getting higher and higher. At present, the method of selecting an annular chain is generally selected based on the overall breaking load of the circular chain and comparison with the working load. Obviously, the results of this calculation method are unsatisfactory for such curved links with large curvature. Through the finite element calculation of the link, the displacement and stress of each part of the link can be more accurately understood, and the damaged part can be determined, so it is possible to propose the basis for further improving the shape and size of the link and increasing the carrying capacity. First, the research object and unit division “Ministry of Coal Standard MT36-80” mine ring with high strength "requirement, the current circular chain specifications in our country 7. Among them, φ18 × 64 specifications are the most widely used, so only in the 18 × 64 specifications of the circular chain finite element calculation.φ18 × 64 circular chain link shape, size, overall coordinates and the division of the unit shown in Figure 1.