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目前,在推土机、装载机、汽车以及轮式起重机等液力机械传动系统中,其变速箱都是采用液压摩擦离合器换档,这是因为它具有适应多速传动,能在瞬时分离和接合,同时具有平稳性等特点。离合器工作的可靠性是当前最主要的问题,原因在于:当摩擦离合器接合或分离时,其摩擦表面要做一定的功,使这些摩擦表面发热和磨损,严重时摩擦片会变形翘曲,甚至出现主动片与被动片熔接或粘结,造成离合器报废。基于以上原因,应尽量降低离合器的发热量。
At present, in hydraulic mechanical transmission systems such as bulldozers, loaders, automobiles, and wheeled cranes, the gearboxes are all shifted by hydraulic friction clutches. This is because they are geared to multi-speed transmission and can be separated and engaged instantaneously. At the same time with the characteristics of stability. The reliability of the clutch is the most important problem at present. The reason is that when the friction clutch is engaged or disengaged, its friction surface needs to have a certain amount of work, so that these friction surfaces will generate heat and wear. In severe cases, the friction plate will deform and warp, even The active sheet and passive sheet are welded or adhered, causing the clutch to be scrapped. Based on the above reasons, the heat amount of the clutch should be reduced as much as possible.