带排气预压式空气滤清器在挖掘机上的应用

全液压挖掘机的液压系统属于大流量高压力系统,流畅的油路是其高工作效率的保证.为了保证吸油效率首要素——主泵的吸油效率,挖掘机厂家都在油箱上加装预压式空气滤清器.预压式空气滤清器为液压系统油箱附件,也称呼吸阀,能对进入油箱的空气进行过滤,同时能够随油箱内液面的变化而使油箱内部保持一定的正气压.1传统呼吸阀目前大多数国产品牌挖掘机使用的都是传统的呼吸阀,主要包括两种结构形式.

Application of Pre-pressurized Type Air Filter with Discharge Valve to Excavators

When refueling or repairing the breather valve for traditional hydraulic cylinder, it isn’t convenient to exhaust the pressure left in oil tank, which arouses hidden trouble in safety. Through inlet and exhaust check valves, pre-pressurized type air filter with discharge valve could control the pressure in oil tank so that the pressure may maintain in a certain range with the change of liquid level. Thus we can not only exhaust manually, but also replace air filter conveniently. The air filter has been awarded a patent in outlook design and matched in batch for main excavator producers.