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通钢集团板石矿业有限责任公司上青矿现使用的PEJ 900×1200型颚式破碎机于1992年投产运行,但在多年的使用实践中,它的一些设计缺陷逐步体现出来,特别是动颚轴头的轴向窜动和径向跳动严重导致动颚轴承短盖无法固定,固定动颚轴承座的对丝频繁被拉断或切断,严重影响生产的顺利进行。
Tonghua Iron and Steel Group slab mining limited liability company Shangqing mine is now using the PEJ 900 × 1200-jaw crusher put into operation in 1992, but in many years of practice, some of its design flaws gradually reflected, especially the move The axial movement and radial run-out of the mandrel shaft head can lead to the inability to fix the short cover of the movable jaw bearing. The fixed pairs of wire-bearing housings are frequently broken or cut off, which seriously hinders the smooth production.