[交通运输]《破碎机液压系统改造研究》.doc

破碎机液压系统改造研究 刘凯 摘 要 破碎设备广泛应用于建筑、冶金、化工和水利工程等各行各业。破碎设备作业工作环境极为恶劣，工作负荷波动性较大。常因放料不均或因破碎腔进入硬度极强的不可破碎物而出现突然的大幅度的超载险情。这就是要求设备本身应具有良好的自我保护系统，以便设备安全运转，故障率保持在低的水平上。因此，过载保护系统在破碎设备中占有着极为重要的地位。 本文通过对破碎设备中圆锥破碎机工况及现有液压系统的分析研究，提出了比较适用的新型液压系统。该系统具有工作性能优良、自动化程度高、运行安全可靠的优点。对提高破碎设备的自控水平和增加整机的可靠性有显著效果，同时又把该新型液压系统有效地运用到我们所开发的一个项目一自循环超细粉碎机上，并对“时滞”问题做了研究。具有较高的准确性。 关键词: 圆锥破碎机 液压系统 自循环超细粉碎机 改 造 hydraulic system renovation research of crusher Liu Kai ABSTRACT The crushing equipments are widely applied to metallurgical industry, building material industry, chemical works, waters conservancy project and so on. It indicates from engineering applications that the working conditions of crushing equipments are extremely inclement because the load fluctuates considerably. The dangerous circumstance of overloading occurs abruptly when uneven charging or hard materials are load into the crushing equipment. The crushing equipment must be equipped with the self-protection system in order to run safely at low fault level. And the overload protection system will play an important role in modern crushing equipments. A new type hydraulic control system has been put forward in this thesis based upon analysis of wording cases on the cone crushers. It follows from research in this thesis that the new type hydraulic control system has some outstanding performances such as high automatic control level, reliability etc...And the new system has been successfully used in the Auto-circling Ultra-fine Crusher developed by us in recently, too. And the time-lad problem on hydraulic control of the new system was studied in details. Keywords: crushing equipment cone crusher hydraulic system auto-circling ultra-fine crusher alteration 一、绪论 （一）破碎设备及其过载保护系统 1．破碎设备概述 破碎机械是对固体物料施加机械力，克服物料的内聚力，使之破碎成块物料的设备。简单地说凡用外力将大颗粒物料变成小颗粒物料过程中使用的设备，都可以叫破碎设备。 通常旋回破碎机破碎过程分为一段破碎(一次破碎)，二段破碎(二破碎)，三段破碎(三次破碎)，整个流程也可称为粗碎、中