Affiliation:
1. College of Mechanical Engineering, Guangdong Ocean University, Zhanjiang 524088, China
2. Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Guangdong Ocean University, Zhanjiang 524088, China
3. Guangdong Provincial Marine Equipment and Manufacturing Engineering Technology Research Center, Zhanjiang 524088, China
Abstract
To optimize and improve the impact performance of a hydraulic rock drill, it is helpful to test the stress waves of the drill and analyze the impact energy, impact frequency, and energy utilization rate. For this study, a stress wave test bench was designed and built, according to international standards, in order to study the impact process of a hydraulic rock drill under the working pressures of 18 MPa and 23 MPa. The impact energy, impact frequency, and energy utilization rate of two different hydraulic rock drill pistons in low, middle, and high gear were analyzed using a control variable method. The results demonstrate that the impact stress waves of the rock drill periodically occur in the drill rod, and then decay exponentially until they become close to zero. Moreover, the amplitude of the incident stress wave determines the rock-breaking ability of the drill. The impact energy of the short piston is greater than that of the long piston, with a maximum average value of 346.1 J; the impact frequency of the long piston is higher than that of the short piston, with a maximum average value of 62 Hz; and the energy utilization rate of the short piston is higher than that of the long piston, with a maximum average value of 56.92%, which is close to the theoretical ideal efficiency. Therefore, it can be concluded that the impact performance of a hydraulic rock drill can be effectively tested using the proposed horizontal bench, and that piston characteristics and the working pressure are the main factors affecting impact performance. Accordingly, when developing a hydraulic rock drill, it is advisable to select a shorter piston and a higher working pressure, thus allowing the drill to provide good impact performance.
Funder
The Guangdong Marine Economic Development (six major marine industries) Special Project
Doctoral Research Start-up Project of Guangdong Ocean University
Zhanjiang Key Laboratory of Modern Marine Fishery Equipment
Subject
Electrical and Electronic Engineering,Industrial and Manufacturing Engineering,Control and Optimization,Mechanical Engineering,Computer Science (miscellaneous),Control and Systems Engineering
Reference33 articles.
1. Research on the hard-rock breaking mechanism of hydraulic drilling impact tunneling;Long;Math. Probl. Eng.,2015
2. Ma, W., Geng, X., Jia, C., Gao, L., Liu, Y., and Tian, X. (2019). Percussion characteristic analysis for hydraulic rock drill with no constant-pressurized chamber through numerical simulation and experiment. Adv. Mech. Eng., 4.
3. Research on the matching of impact performance and collision coefficient of hydraulic rock drill;Li;Shock Vib.,2021
4. A percussion performance analysis for rock-drill drifter through simulation modeling and experimental validation;Seo;Int. J. Precis. Eng. Man.,2016
5. Modelling and Simulation of a Hydraulic Breaker;Giuffrida;Int. J. Fluid Power,2005
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献