声频环保钻机液压系统设计与应用

Design and application of the hydraulic system of sonic drill rig

摘要:

声频环保钻机是一种高端土壤调查取样装备，钻机液压动力头产生高频激振力驱动钻具克服浅部地层阻力，使钻具周围地层发生局部液化进而快速获取高质量的地层原状样品。本文在提出50 m声频环保钻机主要设计参数的基础上，对钻机液压系统设计方案进行分析，选定了开式液压系统以简化系统油路结构。液压系统采用主油路和辅油路的控制方案，主油路驱动动力头振动、回转、给进和履带行走等动作，辅油路驱动支腿调平、桅杆起落和桅杆滑移等动作。对液压系统参数进行了设计计算，选定钻机液压系统工作压力为21 MPa，计算主油路总流量为320 L/min，据此确定了发动机的功率及型号，然后安装调试液压系统并进行了参数检测。在此基础上，开展了钻机在土壤采样中的应用推广，包括大直径双管采样、半合管采样以及复杂地层采样，取样效果良好。钻机液压系统工作稳定，安全可靠，液压管线排布美观，操控灵活方便，能够满足工程应用要求。

Abstract:

Sonic drill rig is high-end soil sampling equipment. The hydraulic top-drive head of the drill rig generates high-frequency exciting forces to drive the drilling tool to overcome the resistance of shallow formation so as to make the formation around the drilling tool liquefied locally， and then quickly obtain high-quality undisturbed samples from formation. Based on the main design parameters of the 50m sonic drill rig， the open hydraulic system was selected to simplify the oil circuit structure of the system through analysis of the hydraulic system design of the drill rig， The hydraulic system adopted the control plan of the main hydraulic circuit and the auxiliary hydraulic circuit， where the main hydraulic circuit drives the vibration， rotation and feeding of the top head， and crawler walking； the auxiliary hydraulic circuit drives the leveling of jack legs， putting up and putting down， and sliding of the mast. The parameters of the hydraulic system were designed and calculated with the working pressure of the hydraulic system of the drill rig selected as 21MPa， and the total flow of the main hydraulic circuit calculated as 320L/min. Therefore， the engine was determined. Then the hydraulic system was installed and debugged， and the drill rig was tested. On this basis， the sampling application and promotion of the drill rig， includes sampling with large diameter double-layered tube and split-tube and samling in complex formation， was carried out with good sampling results. The hydraulic system of the drilling rig is stable， safe and reliable， with beautiful hydraulic line layout， flexible and convenient operation， which can meet the requirements of engineering application.