基于Abaqus的油封堵头拧紧力矩选择分析方法

Analysis Method of Tightening Torque Selection for Oil Seal Plug Based on Abaqus

以某款新能源减速器壳体油封堵头的设计开发为例,为了在设计开发阶段,得到堵头准确可靠的拧紧力矩,结合在螺纹拧紧方面的研究成果,同时提炼项目实施过程中的成果,借助有限元分析的辅助手段来确定堵头的拧紧力矩。分别以防漏、强度、防松3个方面的性能指标为依据,共同确定堵头拧紧力矩。系统介绍了堵头在3种情况下有限元建模方法,针对各性能要求说明了模型简化的方式。首先,按照实际装配关系和密封要求,完成相应载荷施加和边界条件的定义,利用Abaqus软件对模型进行了计算求解,得到了满足防漏下的轴向力;其次,依据VDI的螺栓强度标准,确定了满足强度的轴向力,得到了既满足防漏功能又满足强度要求的拧紧力矩。最后,通过堵头和壳体结合面的防松性能验证前文确定的堵头拧紧力矩是否合理,整个分析流程分别考虑了功能和强度要求,可为后续类似项目的方案设计提供指导。

The design and development of the shell oil seal plug of a new energy reducer is taken as an example.In order to obtain the accurate and reliable tightening torque of the plug in the design and development stage,combined with the previous research results in screw tightening and refining the results in the implementation of the project,the auxiliary means of finite element analysis is used to determine the tightening torque of the plug.The tightening torque of the plug is determined based on the performance indexes of leakage prevention,strength and antiloosening respectively.The finite element modeling method of plug in three cases is introduced systematically,and the model simplification method is explained according to the performance requirements.Firstly,according to the actual assembly relationship and sealing requirements,the corresponding load and boundary conditions are defined.The model is calculated and solved by using Abaqus software,and the axial force satisfying the leakage prevention was obtained.Secondly,according to the bolt strength standard of VDI,the axial force satisfying the strength is determined,and the tightening torque satisfying both the leak-proof function and the strength requirements is obtained.Finally,the anti-loosening performance of the plug and the joint surface of the shell verifies whether the plug tightening torque determined above is reasonable.The function and strength requirements are respectively considered in the whole analysis process,which can provide guidance for the subsequent design of similar projects.