Abstract
As a technological innovation of high-power hydraulic rock drill, double damping system has a very important effect on impact performance. The double damping system is a floating mechanism. The characteristics of the floating mechanism have an important influence on the impact energy, frequency, and power of the hydraulic rock drill. Based on orifice throttling theory, the static equilibrium position of a damping piston was calculated, and the characteristic parameters of the double damping system were summarized as damping flow (Qd) and feed force (Fd). According to the characterization parameters of the double damping system, an experimental scheme of the floating characteristics of the double damping system was designed, and the combined experimental data of Qd and Fd were obtained. The 40 groups of experimental data were extracted, and the relationship between the combination (Qd, Fd) and impact energy and frequency and power were analyzed. The combination (Qd, Fd) with maximum and minimum power was selected to analyze the motion law of an impact piston. The maximum drilling power was obtained at the combination (Qd = 8 L·min−1, Fd = 16.25 kN). The influence factors of the double damping system on impact performance were summarized, and the characteristics of the double damping system under optimal impact performance were obtained.
Highlights
Hydraulic rock drill is widely used in mining, coal mine excavation, railway, and highway tunnel and rock excavation projects with many advantages such as high efficiency, cleanliness, and safety
As a technological innovation of the single damping system, the double damping system emerged as the times require, and high-power hydraulic drills with the double damping system have been developed
E double damping system uses single oil supply with constant flow and two damping chambers. It has the advantages of fast response, good energy absorption, and fast heat dissipation and is mostly used in high-power hydraulic rock drills
Summary
Hydraulic rock drill is widely used in mining, coal mine excavation, railway, and highway tunnel and rock excavation projects with many advantages such as high efficiency, cleanliness, and safety. As a technological innovation of the single damping system, the double damping system emerged as the times require, and high-power hydraulic drills with the double damping system have been developed. It is an important trend to develop the high-power hydraulic rock drill with double damping system. E double damping system uses single oil supply with constant flow and two damping chambers It has the advantages of fast response, good energy absorption, and fast heat dissipation and is mostly used in high-power hydraulic rock drills. Because of the importance of the damping system in the high-power rock drill, many experts and scholars have studied the interaction between damping system and impact system. In order to reduce the negative impact, it is necessary to research the floating characteristics, influencing factors, and changing rules of the double damping system
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
