1前言420#破碎机（型号为PYB2200弹性圆锥破碎机）是海钢公司选矿厂主要生产设备，自1979年投产以来，未换过机座。在生产中发现机体振动大，地脚螺丝易松，基础混凝土有裂痕，润滑油经常渗有大量矿粉。经部分解体检测，其机座部与碗形轴承配合处尺寸最大为四1509Inm左右，且呈 1 Introduction 420 # crusher (model PYB2200 elastic cone crusher) is the main production equipment of the sea steel company concentrator, since 1979 put into production, did not change the base. Found in the production of large body vibration, easy to loose the ground screws, cracks in the basic concrete, lubricating oil often see a large number of mineral powder infiltration. After the detection of partial disintegration, the size of its seat with the bowl-shaped bearing the largest size of about four 1509Inm, and was