The piston rod fracture phenomenon is basically unable to repair and recover, once it will cause great economic losses, so the prevention of such failures is very important. Yantai Shunfa piston rod manufacturers will introduce the reasons for its fracture, the analysis is as follows.
1. Operational problems. The piston rod fracture may be caused by improper operation of the operator or non-standard operation.
2. Product problems. The quality of the piston rod is also one of the reasons for the fracture. Although there are few cases of breakage caused by product quality problems, this possibility cannot be ruled out at will.
3. Equipment problems. The quality of its equipment is also an aspect to consider. Take the excavator as an example, if the shaft and sleeve clearance is too large, the excavator in the operation of the formation of the shaking cylinder, will also make it broken.
4. Load problem. Piston rod selection, generally according to the actual needs of the requirements to choose. But sometimes because of the special needs of the work, the piston rod high-frequency vibration or tension becomes larger, and this situation lasts for a long time will also make the piston rod stress is very large, so it is easy to break.
5. Installation problems. It is possible that the flywheel was installed incorrectly or tilted. Because the flywheel is not installed correctly, the internal stress of the piston assembly will be increased. The flywheel tilt will cause additional inertia and additional inertia torque, so that the piston rod axis and cylinder liner shaft does not coincide, resulting in piston and cylinder liner inner surface of the fitting surface tilt, under the above double action, easy to make the piston rod fatigue fracture.
6. Gap: under normal circumstances, there is no point on the assembly, which leads to the larger and larger gap in the process of operation.
7.stress: the main reason is focused on the part of the piston rod connection, or the crosshead is not correct in the installation, and the thread connected with the crosshead, because it has been affected and broken, or the position of the thread is less than the point of preloading.
8.wear: will lead to precision piston rod connection loosening and clearance, because after a long time of use, resulting in the connection of the wear is more serious, will be affected by external force and lead to product fracture.
The connecting thread of the crossehead and the thread position of the fastening piston are two key parts of the piston rod that are prone to fracture. According to the description of the above reasons, we should pay more attention to its material selection, design and processing, and use, so as to significantly reduce the probability of failure.
Max Auto Parts ltd is the top manufacturer of piston rod from China