十堰郧阳区雪佛龙CXEP润滑脂-HD液压油经销拉把润滑分为液体润滑和边界润滑。作相对运动的两个金属表面完全被润滑油膜隔开，没有金属的直接接触，这种润滑状态叫做液体润滑；随着载荷的增加，金属表面之间的油膜厚度逐渐减薄，当载荷增至一定程度，连续的油膜被金属表面的峰顶破坏，局部产生金属表面之间的直接接触，这种润滑状态叫做边界润滑。 　　由于其在适用性能和作用机理上的区分是不很严格的，所以有时很难将二者区分开。故在西方 国家，把极压剂、抗磨剂和油性剂统称为载荷添加剂（Load－Carrying additives）。 　　极压抗磨剂是一种重要的润滑脂添加剂，大部分是一些含硫、磷、氯、铅、钼的化合物。在一般情况下，氯类、硫类可提高润滑脂的耐负荷能力，防止金属表面在高负荷条件下发生烧结、卡咬、刮伤；而磷类、有机金属盐类具有较高的抗磨能力，可防止或减少金属表面在中等负荷条件下的磨损。实际应用中，通常将不同种类的极压抗磨剂按一定比例混合使用性能更好。利用一般磷化物具有抗磨性、氯化物与硫化物具有的极压性，使添加剂同时含氯、含磷或含硫化合物，从而既具有极压性，又具有抗磨性。The lubrication is divided into liquid lubrication and boundary lubrication. The relative motion of the two metal surfaces is completely separated by the oil film, and there is no direct contact between the metals. This lubrication state is called liquid lubrication, when the load is increased to a certain extent, the continuous oil film is destroyed by the peak of the metal surface, resulting in local direct contact between the metal surface, this lubrication state is called boundary lubrication. It is sometimes difficult to distinguish between the two because the distinction between the applicable performance and the mechanism of action is not very strict. Therefore, in the west, the country, the extreme pressure agent, anti-wear agent and oily agent collectively called Load-Carrying additives. Extreme pressure antiwear agents are important grease additives, most of which are compounds containing sulfur, phosphorus, chlorine, lead and molybdenum. In general, chlorine, sulfur can improve the load-bearing capacity of grease, to prevent metal surface in high-load conditions of sintering, bite, scratch; Phosphorus and organometallic salts have high wear resistance, which can prevent or reduce the wear of metal surface under medium load. In practical application, it is better to mix different kinds of EP antiwear agents in a certain proportion. The additive contains chlorine, phosphorus and sulfur compounds simultaneously, so that it has both extreme pressure and anti-wear properties