毕业设计（论文）-500T破碎机液压站设计（全套图纸）.doc

(内蒙古科技大学机械工程学院机械10-1班 1064103118)
摘要介绍一种颚式破碎机液压过载保护装置,采用柱塞式喷油泵提供系统所需高压油,用非标准件“动作阀”取代溢流阀,实现过载泄油安全保护和排除故障后自动复位。该液压过载保护系统液压元件少、功耗低、体积小、可靠性高,具有对颚式破碎机进行安全保护、排除过载故障、自动恢复正常生产等功能,便于实现自动化,适用于过载频繁的场合。
关键词颚式破碎机液压过载保护
【分类号】,
全套设计加153893706
STUDY ON HYDRAULIC OVERLOAD PROTECTION OF JAW CRUSHERS
( Inner Mongolia University of Science and Technology College of mechanical engineering machinery
class 10-1 Yang Yuhao class 1064103118)
ABSTRACT A Hydraulic Overload Protection System for the jaw crusher is introduced in system is supplied with high pressure oil by a plunger-type fuel using the ponent” action valve”instead of the overflow valve,the system can carry out over-load protection by dripping oil and achieve self-reset after a breakdown is fixed. This system, withfewer hydraulic elements, has the characteristics of lower power consumption, smaller volume andhigher reliability,and has the functions of overload protection,removal of overload faults,and au-tomatic return to normal operation,so as to realize crushing is suitable for crushingunder frequent overload.
KEY WORDS Jaw crusher Hydraulic overload protection
1 前言
颚式破碎机在作业过程中过载时,要求保护装置准确、可靠地动作,使机器安全运转。在颚式破碎机中,推力板是结构简单、成本较低的零件,一般都是削弱该板的断面,降低其安全系数,在过载时推力板承受过载压力或弯曲而断裂,达到保护机器的目的。但在使用中常出现过载反应不灵敏现象,同时推力板的更换费时、费工、经济性差。
沈阳重型机器厂在PE-250颚式破碎机上改用剪断销保险装置,即在皮带轮和偏心轴之间,通过驱动柄设置剪断销进行过载保护,维修