Ultrasonic drilling has emerged as a prominent technique in extraterrestrial environments due to its advantageous features.However,its application in extraterrestrial sampling missions is constrained by challenges suc...Ultrasonic drilling has emerged as a prominent technique in extraterrestrial environments due to its advantageous features.However,its application in extraterrestrial sampling missions is constrained by challenges such as drilling,chip removal e ciency,and high and low temperature adaptability.Addressing these limitations,this study introduces a novel multi-point driven rotary helical longitudinal torsion horn.The initial phase involved a detailed analysis of the actuator’s structure and operational principle.Subsequently,the actuator’s vibration mode and elliptical motion trajectory were validated through finite element simulation.The study further explores a methodology for adjusting the parameters of the helical groove and the displacement amplitude of the impact head.Following the theoretical analysis,prototypes of the actuator and drill were fabricated.Their adaptability to high and low temperatures,as well as their output characteristics,were rigorously tested.Experimental results demonstrate that with an increase in temperature,the dynamic impedance of the actuator initially rises before decreasing,while the mechanical quality factor exhibits the opposite trend.Notably,the concurrent activation of points P1and P2significantly enhances the no-load speed,achieving a maximum of 506 revolutions per minute(r/min).Under conditions of power below 35 W and a drilling pressure of 10 N,the drilling speed achieved in basalt is 6.2 millimeters per minute(mm/min).The proposed multipoint-driven actuator can e ectively improve the drilling and chip removal e ciency of the driller,which is an important application prospect in future extraterrestrial drilling missions.展开更多
基金Supported by National Natural Science Foundation of China(Grant Nos.52475497 and 42241149)Shenzhen Municipal Fundamental Research Program of China(Grant Nos.JCYJ20200109150425085 and JCYJ20220818102601004)+2 种基金Shenzhen Municipal Science and Technology Program of China(Grant No.JSGG20220831105800001)Knowledge Innovation Program of Wuhan-Basic Research(Grant No.2022010801010203)Hubei Provincial Science and Technology Program(Grant No.2023BAB154)。
文摘Ultrasonic drilling has emerged as a prominent technique in extraterrestrial environments due to its advantageous features.However,its application in extraterrestrial sampling missions is constrained by challenges such as drilling,chip removal e ciency,and high and low temperature adaptability.Addressing these limitations,this study introduces a novel multi-point driven rotary helical longitudinal torsion horn.The initial phase involved a detailed analysis of the actuator’s structure and operational principle.Subsequently,the actuator’s vibration mode and elliptical motion trajectory were validated through finite element simulation.The study further explores a methodology for adjusting the parameters of the helical groove and the displacement amplitude of the impact head.Following the theoretical analysis,prototypes of the actuator and drill were fabricated.Their adaptability to high and low temperatures,as well as their output characteristics,were rigorously tested.Experimental results demonstrate that with an increase in temperature,the dynamic impedance of the actuator initially rises before decreasing,while the mechanical quality factor exhibits the opposite trend.Notably,the concurrent activation of points P1and P2significantly enhances the no-load speed,achieving a maximum of 506 revolutions per minute(r/min).Under conditions of power below 35 W and a drilling pressure of 10 N,the drilling speed achieved in basalt is 6.2 millimeters per minute(mm/min).The proposed multipoint-driven actuator can e ectively improve the drilling and chip removal e ciency of the driller,which is an important application prospect in future extraterrestrial drilling missions.
