Research And Analysis For Mine Hydraulic Vibration Drilling

At present, there are a variety of mine drilling rig in our country, most of it is with rotary drilling. But in the actual drilling process of downhole, sometimes may drill to the rock or other protodyakonov coefficient between4and8, it is not advantageto improve drilling efficiency for common way of rotary drilling, thus influencing of drilling and production engineering, increasing the labor intensity of workers. In addition, the coal mine gas concentration is relatively high, the use of electric drill could trigger a gas explosion. it is necessary to study a hydraulic drill which adapt to different working condition. When the drill under normal working condition of coal mining, having rotating drilling method, but faced with a hard rock and other material, adopting the impact rotary drilling method, which is not only beneficial to improve drilling efficiency of drilling, but also save the human、improve the technology of mining and have certain significance to society. This article mainly studied in the following aspects:(1) Puting forward the designing requirements and designing scheme of mine hydraulic vibration drilling, and establishing a three-dimensional model. (2) Analyzing the mechanical characteristics under different drilling ways, when protodyakonov coefficient under f≤3and3<f≤6, having stress analysis to the helical surface of drill rod, get the relationship of output torque between the drill piper r1、r2、f. In addition, also has carried on the stress analysis to gear gear contact stress under different time period, two maximum contact stress of the gear transmission is246.97MPa, and can get from the analysis between the two axis gear contact stress is49.1MPa, optimizing of the gear installation.(3) Established the parameters optimization design method for nitrogen chamber of hydraulic impactor, through the determination of some parameters that movement cycle, impact speed and the quality of piston, stroke interval, than nitrogen gas chamber pressure piercing, can getting the other performance parameters, that is helpful to design the hydraulic impactor for requirements.(4) Through AMESim software, setting up the model of machine structure parts of hydraulic impactor, the whole system model of the hydraulic impact machine, through the simulation analysis, getting the dynamic characteristics curve of hydraulic impactor movement, hydraulic impact of commutation system have little impact on the motor work. Through analysis to the hydraulic shock impact time and impact the performance of the relevant data, the mathematical model of hydraulic shock stroke and return are established. It has a certain guiding significance to the theoretical analysis and practical engineering problems of hydraulic impact. In addition, by using the Design explorer modules in the AMESim, the impact speed is optimized, improving the impact energy.(5) Using the workbench for hydraulic impact machine, hydraulic motor and hydraulic drill of the whole structure of modal analysis, the frequency of the hydraulic motor and the overall structure of the hydraulic drilling rig is more similar. Due to first order frequency of hydraulic drill is116.96Hz, and in the process of product design, the working frequency of drill for3～8Hz, so it can avoid the occurrence of resonance.