When the mass of the hydraulic cylinder is large or the load is large, and the moving speed is high (>12m/s), it has a large momentum due to the large inertial force. In this case, when the piston moves to the end of the cylinder tube, it will mechanically collide with the end cover, which will cause great impact and noise, and the weight will affect the machining accuracy, and even cause destructive accidents? Therefore, in large-scale, high-speed or high-precision hydraulic equipment, buffer devices are often provided, the purpose of which is to increase the oil return resistance when the piston approaches the terminal, thereby slowing down the movement speed of the moving parts and avoiding hitting the end cover of the hydraulic cylinder.
