Research On Mechanical Properties And Test System Of The Shearer Machine Oblique Cut Feeding Condition

To explore the reasons why the shearer in oblique cut feeding condition is of frequent accidents, have did some research of mechanical properties on it. Based on the principle of the shearer in oblique cut feeding condition, established the three-dimensional spatial model of shearer in oblique cut feeding condition; established the spatial mechanics model and its mathematical model based on the three-dimensional spatial model. Deduced the calculation method of the maximum cutting thickness and the instantaneous cutting thickness when the shearer in oblique cut feeding condition; Started from the properties and changement of cutting thickness,researched the cutting resistance characteristics of the cutter and the drum.From the angle of crowded coal-petrography area,combined with the coal-petrography failure theory deduced the calculation method of the drum axial force when the shearer in oblique cut feeding condition.After the cutting resistance and axial force was definited, gained the drum load and its change characteristics, and then simulated the load and its change characteristics by computer.Took drum load into the spatial model of shearer in oblique cut feeding condition,and then calculated the stress of the sliding boot stress by programming. Based on the results of sliding boot stress calculation, did analysis of fatigue life and stress on guide sliding boot and smooth sliding boot; after that proposed structure improvement measures on guide sliding boot and smooth sliding boot. After the theoretical analysis, researched the test scheme of drum load and then put forward a feasible test scheme to determine the three-aixs force of cutting tooth and the drum load, designed and researched the test scheme and the key subsystems like cutting measurement tooth sensors, data processing software and so on.