工程机械的故障特点分析及故障诊断技巧(国外英文资料).doc

工程机械的故障特点分析及故障诊断技巧(国外英文资料) Fault characteristics analysis and fault diagnosis skills of construction machinery 2011-08-17 10:47 source: construction machinery technology and management to share: the number of visits: 0 construction machinery failure characteristics analysis and fault diagnosis skills Author: Hubei Expressway Industrial Development Co., Ltd. Chen Jiang /CHEN Qiang 1, construction machinery failure stage and characteristics (1) the fault characteristics of the initial stage of construction machinery. Engineering machinery in initial stage (equivalent to running) the fault is from high to low (lower curve), using the initial failure rate is with the manufacture or maintenance of quality and the use of time. If the engineering machinery manufacture or repair of high quality, and can correctly use and maintenance. Then the initial failure rate is low. Otherwise, the early failure rate will be high. Early fault more is loose or loose bolts; loose or loose pipe joints: residual metal chips or foundry sand clogging oil channel or caught in relative motion friction injury parts (such as the actuator in the hydraulic system of hydraulic cylinder) caused by oil spills, after adjusting the gap or pressure change, can not make parts the implementation of the provisions, because some joint bolt is not tight and Water Leakage, oil and air leakage etc.. (2) the fault characteristics of the normal use stage of construction machinery. Construction machinery after the completion of the period, into the normal use of stage. Construction machinery operation in this stage, as long as the required maintenance and proper use, generally will not fail, even if the failure is also a failure of random (this fault is hidden, maintenance or inspection is not easy to find), the failure rate is very low, flat curve edged up. If the construction machinery fails during the normal use period, it is more accidental or due to improper use and maintenance. (3) the fault characteristics