Experimental Research and Analysis of a Quarry Drilling Rig

Abstract

The article presents the relationship between the technical condition of the elements of bearing supports of mining equipment and spectral characteristics based on the analysis of the high-frequency component of the vibration signal, allowing to determine the type of defects and predict their development.Various methods of diagnostics of rolling bearing defects are considered and the method of narrow-band analysis of spectral components is recommended for industrial development. In addition to the General level of vibration, reference spectral masks limiting the levels of vibration intensity in individual spectral bands can be used as diagnostic signs of changes in the technical condition.As a result of the study, the dependences of vibration parameters on defects of bearing bearings were established, on the basis of which the method of in-place assessment of the technical condition of mining equipment and prediction of the dynamic quality of bearing assemblies, which improves the reliability and efficiency of their use, is justified.

Criteria for assessing the performance of mining and transport equipment of mining enterprises

“…The functional criterion of a machine as the final useful effect of functioning can be represented as theoretical λ, technical λ t or operational λ e [14][15][16][17][18][19].…”

“…Let us consider the functional criteria of transport machines. The purpose of any transport machine is to move a certain amount of rock mass over a certain distance per unit of time, which can be represented as [14][15][16][19][20][21] ,…”

Development of technical solutions for modernization of the rotary feed mechanism of a quarry drilling rig

“…The hydraulic circuit of the electrohydromechanical rotary-feeding mechanism ensures its reliable and smooth operation both during startup and during various drilling modes. The main elements of the hydraulic system are [4,12,14,18]:…”

“…The pneumohydraulic accumulator 19 connected to line 16 allows for a smooth change in load and provides regulation of the rigidity characteristics of the drive. Damping of torsional vibrations of the drill string and transmission is carried out due to hydraulic losses in the pipelines and hoses connecting the accumulator 19 and the hydraulic machine 15 [4,7,10,12,14,18].…”

“…The possibility of regulating the speed of the rotator by changing the amount of sliding of the hydraulic machine has been proven. The high safety properties of the drive have been confirmed [4,10,17,18]. Industrial tests revealed shortcomings in the rotator design, which require the following measures:…”