目前国外大中型工程机械大多采用集中润滑系统润滑各相对摩擦的部位。国内工程机械（例如挖掘机、装载机、摊铺机、推土机和混凝土泵车等）也逐渐采用手动或自动控制的集中润滑系统，它的特点是全密封型，机械设备上各润滑点都能按时、按量注入润滑油或润滑脂。在工程机械上设 At present, most large and medium-sized foreign construction machinery lubrication system using centralized lubrication of the relative friction of the site. Domestic engineering machinery (such as excavators, loaders, pavers, bulldozers and concrete pump trucks, etc.) are gradually adopting a centralized or manual lubrication control system, which is characterized by a fully sealed type, which can lubricate all the points on mechanical equipment On time, according to the amount of injection of lubricating oil or grease. Set up in construction machinery