Fuzzy Reliability Analysis and Optimization Design of Hydraulic System of Bale Carrier for Tie Arm Device

Pei Chenghui,Liu Xingyan,Liu Zhigang,Zhang Tong,Li Guoliang

Table 4 Hydraulic control system five parts FMECA table

Product name Sequence Number Failure mode Cause of issue Local effects High level impact The final impact Severity level Take measures Servo 1 Slow response, slow response Reduced oil pressure Cylinder instability Corresponding push, dial action instability Tie arm device stacking quality decline Ⅲ level Increase the pressure of oil supply 2 Vibration appears The system gain is too high Cylinder instability Corresponding push, dial action instability Tie arm device stacking quality decline Ⅱ level Reduce system gain Hydraulic Cylinder 3 Leakage Seal failure Cylinder lack of thrust Corresponding to push, dial performance decline Tie arm device stacking quality decline Ⅲ level Replace the seal 4 Internal leakage Seals wear Cylinder instability Corresponding to push, dial performance decline Tie arm device stacking quality decline Ⅲ level Replace the seal 5 Crawl Hydraulic cylinder accumulates air Cylinder instability Hydraulic cylinder life is reduced Tie arm device stacking quality decline Ⅲ level Exhaust the air 6 Lack of thrust Frictional resistance is too large Reduced effective traction cylinder Corresponding push, dial action instability Tie arm device stacking quality decline Ⅲ level Adjust the cylinder and piston with the gap Check valve 7 Oil is not countercurrent Check valve stuck Valve does not work Corresponding push, dial no corresponding action Tie arm device to stop working Ⅱ level Demolition, cleaning valve Directional valve 8 Commutation is not reliable Spring deformation fracture Cylinder instability Corresponding push, dial action instability Tie arm device stacking quality decline Ⅱ level Adjust the gap 9 Commutation moves slowly Poor lubrication Change the valve function Corresponding push, dial action instability Tie arm device stacking quality decline Ⅲ level Adjust the viscosity of the lubricant Pipeline 10 Pipeline blocked Oil pollution Inadequate supply of oil Cylinder instability Tie arm device stacking quality decline Ⅳ level Filter oil impurities