超重机上的制动器有两个主要用途:1)使机构减速;2)使机构停住不动。制动器的工作性能对起重机的使用性能有很大的影响。制动器失灵,重则引起重物下坠或起重机碰撞;轻则影响起重机的生产率。从安全观点出发,在起重机上使用的全都是封闭式制动器。这种制动器用压缩弹簧的张力(也有用重锤的)造成制动力矩,而以专门的松闸器松闸。松闸器的 Brakes on overweight machines have two main uses: 1) decelerating the mechanism; and 2) stopping the mechanism. The working performance of the brake has a great impact on the performance of the crane. Brake failure, heavy cause weight drop or crane collision; ranging from impact crane productivity. From a safety point of view, all of the cranes used are enclosed brakes. This type of brake uses a compression spring tension (also useful for weight) to cause a braking torque, and a special release brake. The release of the brake