Research On Fault Diagnosis Technique Of Coal Mine Shearer’s Ranging Arm Gearbox

The coal mining shearer is one of key equipment in fully mechanizedworking face, high power, high strength, high reliability is the moderncoal winning machine development direction. However as coal miningmachine reliability most weak links, ranging arm gear box frequentmechanical failure, according to the coal mining machinery import toShendong, the failure rate statistic, in recent years the average of coalminning machine failure rate of34.2%, has severely restricted the chanceof improving open coal minning machine, affect the fully mechanizedworking face equilibrium production.And at present in Shendong mining area rocker gear box for monitoringthe traditional methods of ferrographic analysis, and can’t effectivelymake accurate judgment, sometimes for a variety of human factors and evenmisjudgment, and give the field production bring a lot of uncertainty,and the urgent need for a quick and easy to monitoring and diagnosistechnology to judge ranging arm gear box operation state, and provide thescientific decision support.This paper in the search for a large number of data on the basis ofthe subject research firstly background, the significance and thedomestic and foreign research present situation, this paper shows the coalmining machine with the rocker gearbox fault diagnosis of difficultiesand characteristics and existing the shortcomings of the methods, againthrough the lock gear box installation, operation condition are analyzed,and the detailed analysis of its structure, common failure modes, acomparative analysis of the two kinds of imported coal winning machinewith the rocker gear box structure, fault law and so on, carefully studythe vibration fault gear box mechanism, modern signal analysis technology,combined with the ranging arm gearbox fault law of statistics, in viewof the high speed, low fault zone area gears, bearings is put forward byuse of the mature vibration testing, signal processing method for faultdiagnosis scheme. After maintenance the ranging arm gear box for groundloading test plan, to the rapidly detect and judge its technical state;According to the coal mine under-ground coal winning machine with theranging arm gearbox fault hidden trouble, because coal mine productionenvironments, ranging arm gear box installation particularity, putsforward the convenient type in the instrument of the vibration testingranging arm gear box no-load offline situation in vibration testingscheme.