基于COMSOL风电齿轮箱大过盈装配的有限元模拟分析

SIMULATION OF FINITE ELEMENT FOR LARGE INGERFERENCE FIT BASED ON COMSOL

大功率风电齿轮增速箱行星架与行星轮轴多采用大过盈配合,目前采用温差法过盈装配行星架与行星轮轴存在较大的位置度偏差,从而影响齿轮箱的可靠性与寿命。本文提出加装配热块与轴向约束定位的方案以解决该问题,利用多物理场耦合软件COMSOL Multiphysics分别对设计方案进行模拟仿真。仿真结果表明:加装配热块可以缓解太阳轮边缘热应力集中的问题,但对行星轮轴变形的影响较小;轴向约束定位可以对变形起到很好的抑制作用,但会加剧局部应力集中;加装配热块与轴向约束定位配合使用可以起到较好的效果,能有效解决装配垂直度与位置度的问题。

Aim at the method of difference temperature assembles the planet carrier and the planet pin which exit position deviation＇s question,we proposed a program that is adding thermal compensation block and axial constraint positioning,useing multi-physical field coupling software COMSOL Multiphysics to carry on the analog simulation separately to these kinds of plans. The simulation result indicated： adding the thermal compensation block can be possible to ease the edge of sun gear thermal load centralized question,but little effect on the deformation of the planet pin; The Axial restraint positioning can play good inhibitory effect on the deformation,but it will increase the local stress concentration,Then affecting the overall life of the gearbox.