我矿使用上海冶金矿山机械厂制造的PEF250×400破碎机。该破碎机的滑动轴承部位经常发热。我们把滑动轴承改为3628双列向心球面滚子轴承,并对机架和动颚也相应进行改造。机架瓦座换成滚动轴承座,内端轴承端盖采用压盖,用上轴承座压紧;机架外端轴承盖用螺栓紧固,但可调整轴承配合间隙。机架材料原为铸钢,改为40毫米厚的钢板焊接。动颚部件的轴承座也用厚40毫米钢板加热后锻 I mine using the Shanghai Metallurgical Mining Machinery Factory PEF250 × 400 crusher. The crusher bearing parts often heat. We change the plain bearing to 3628 double row radial spherical roller bearings, and the corresponding modification of the frame and moving jaw. The chassis base is replaced with a rolling bearing housing. The inner end bearing end cap is gland, which is pressed on the bearing seat. The outer end bearing cap of the machine frame is fastened with bolts, but the clearance between the bearings can be adjusted. The frame material was cast steel, instead of 40 mm thick steel welding. Dynamic jaw parts of the bearing seat is also heated 40mm thick steel forging