Advantages and characteristics of serpentine spring coupling

蛇形弹簧联轴器是一种结构的金属弹性联轴器。它以蛇形弹簧片轴向嵌入两半联轴器的齿槽内，来实现原动机与工作机的联接，由于簧片的特 殊性能，从而很大程度上避免了原动机与工作机的共振现象，使用寿命远高于非金属弹性元件联轴器；簧片所接触的齿面为弧形，接触面的大小随传递扭矩的大小而变化，因而它能承受大的载荷变动量，经测定其短时超载能力为额定扭矩的2～3倍，传动效率达99.5％，运行可 靠；且蛇形弹簧联轴器的结构简单，装拆方便，允许有较大的安装偏差，适用于冲击式的碎煤机、Serpentine spring coupling碎石机、曲柄往复运动、矿山、重型机械、减速机等。蛇形弹簧联轴器是当今国 际机械领域的轴联接传动部件，也是一种非常通用的轴联接传动部件，它广泛应用于各种机械及设备的轴传动，凡是有马达与轴相连、马达与减速箱相弱或轴与轴相联的地方都可应用。我国许多大型企业引进的成套进 口设备的轴连接都采用它作为传动部件，蛇形弹簧联轴器具有许多法兰盘轴联接无法比拟的优点，如：传动精 度 高、吸振、噪音小、运转平衡、安装便捷，对被联接的两轴轴线平行度、同心度、方向误差、偏角误差等要求不高，蛇形弹簧能根据载荷变化自动调节其刚性大小。

蛇形联轴器的特性
　　1. The coupling is axially embedded in the two halves with a serpentine spring leaf for more than 36%.The serpentine spring leaf of the trapezoidal section is made of spring steel, which has undergone strict heat treatment and processing. It has good mechanical properties, so that the service life of the coupling is much longer than that of the non-metal elastic element coupling (such as elastic sleeve pin , Nylon rod pin coupling) greatly increased.
　　2. The tooth surfaces of the two half couplings in contact with the reeds are arc-shaped. When the transmission torque increases, the springs will deform along the tooth arcs, so that the force points of the two half couplings on the reeds are close .The contact point between the reed and the tooth surface, that is, the change of torque, changes with the size of the transmitted torque, and its transmission characteristics are variable stiffness.Therefore, it has a larger load variation than general elastic couplings.The cushioning effect produced by the transmission force when the reed deforms along the tooth arc, especially when the machine is started or impact load, has the characteristic of protecting the supporting parts to a certain extent.
　　3. The transmission efficiency of the coupling is determined to reach 99.47%, and its short-term overload capacity is twice the rated torque.
　　4. The aluminum alloy casing protects the spring from being thrown out during operation, and the casing is filled with butter, which not only makes the lubrication good, but also makes the noise when the reed engage is absorbed by the butter damping.
　　5. The whole machine has few parts, small size and light weight. The spring leaf designed as a trapezoidal cross-section and the trapezoidal tooth groove are particularly convenient and tight, so that the assembly, disassembly and maintenance are easier than ordinary couplings.
　　6. Since the spring leaf and the tooth arc surface are in point contact, the coupling can obtain greater flexibility.It can be installed to work normally under conditions of radial, angular and axial deviations at the same time.