Reasonable Location of Measurement Points in Measuring Device for Impact Energy Estimation in Performance Test of Rock Drill

Abstract

A new structure of the impact energy measuring device, which can be used for performance testing of a percussive rock drill, was proposed and its performance was analyzed by means of finite element analysis. In the simulation, when the drill hits 50 J, the stress wave generated in the drill rod is about 64 MPa. Then the stress wave transmitted through the drill rod is converted into a pressure wave of oil inside the cylinder, whose maximum value is 15-28 MPa, which varies with position. Therefore, a reasonable location of the measurement points can increase the measurement accuracy while extending the service life of the sensor. From the results of the study, it can be seen that the new proposed device can be used effectively in the field of impact energy measurement of rock drill due to its simple structure and high reliability. Especially, it is possible to estimate its impact energy without altering the structure of the rock drill so that it can be used in the performance testing process in rock drill plants.