The purpose of reliability analysis of construction machinery is to evaluate the reliability level of construction machinery, find out its weak links, accumulate data for enterprises through information feedback, improve design and process, improve the inherent reliability of construction machinery, and formulate correct Maintenance strategy to determine a reasonable maintenance cycle to ensure the reliability of construction machinery.
The reliability level of the power unit and its constituent unit fuel unit and piston rod assembly.
Tde power unit; Tf fuel unit; Tpis piston rod assembly reliability index value average fault number in the specified cut-off time nj213 fault-free working time Tde/103h164 average fault flow parameter / (103h)-1061 sub-sample fault flow parameter Standard deviation / (103h) -1005 fault flow parameter confidence coefficient Kg196 fuel unit average fault-free working time Tf / 103h373 piston rod assembly average fault-free working time TPiS / 103h529 analysis shows that the weak link of the bulldozer power plant is the fuel device (component Fault coefficient Kpf=044) and piston rod assembly (component failure coefficient Kp.pis=031), the faulty parts are the high pressure oil pump, piston pair, valve, valve seat and injector and piston ring of the fuel device. The failure modes are mainly wear, fatigue cracks and fractures.
The analysis shows that the power plant fault flow parameter (t) is a simple flow with little change, the fault occurrence is random, and the fault flow parameter value is high (=0611(103h)-1). The probability of trouble-free operation of power plant P(t) increases with working time t. 235 Jiang Yingshuo et al.: The reliability analysis of bulldozers is reduced. The average life of power plant is mainly determined by the reliability level of its weakest link fuel device. It indicates that the reliability level of the power unit is low, its average life Tde=164103h, and the probability of failure-free operation P(t=164)=037.
Wall Hanging Electric Fireplace
Wall Hanging Electric Fireplace,Wall Mounted Fireplace,Wall Hanging Fireplace,Led Electric Fireplace
JINAN LODOR CNC EQUIPMENT CO.,LTD , https://www.zgfireplace.com