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一、前言环式碎煤机是从美国引进的一种先进的碎煤设备,因这种碎煤机具有碎煤效率高(700～800吨/小时)、易检修、噪声小等优点,所以近几年在我国发展较快。锤环(见图1)是碎煤机的关键易损件。锤环工作时高速旋转(740转/分)既自转又公转,受交变应力作用,并与煤块、矸石高速碰撞,磨损严重。因此,要求锤环必须具有极好的冲击韧性和较高的强度、硬度,以保证不碎、不裂地长期安全运转。为了提高锤环运转安全性和使用寿命,除了设计
I. Introduction Ring coal pulverizer is an advanced coal crushing equipment imported from the United States. Because of its high efficiency (700-800 t / h), easy operation and maintenance, low noise and other advantages, In recent years, the rapid development in our country. Hammer ring (see Figure 1) is the key wearing parts crusher. Hammer ring work at high speed rotation (740 rev / min) both rotation and revolution, by the role of alternating stress, and coal, gangue collision at high speed, serious wear and tear. Therefore, the hammer ring must have excellent impact toughness and high strength, hardness, to ensure that no broken, cracked long-term safe operation. In order to improve the hammer ring operation safety and service life, in addition to design