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建立了水射流辅助截齿破碎钴结壳的力学模型,通过仿真研究获取了水射流系统参数与截齿在钴结壳表面切出初始裂纹所需最小破碎力的作用规律。仿真结果表明:当水射流的作用点和截齿的作用点不重合时,水射流的辅助破碎不仅不能减小截齿所需的破碎力,反而会增加截齿所需的破碎力;当水射流的作用点和截齿的作用点重合时,水射流的辅助破碎能有效减小截齿所需的破碎力;与纯截齿破碎钴结壳相比,当水射流的压力为5 MPa时,截齿所需的破碎力下降幅度约为50%;随着水射流系统工作压力的增加,水射流系统的辅助破碎作用越强。
The mechanical model of crushing cobalt crusts with water jet-assisted picks was established. The law of the water jet system parameters and the minimum crushing force required to cut the initial cracks on the surface of cobalt crusts were obtained by simulation. The simulation results show that when the action point of the water jet and the action point of the pick are not coincident, the auxiliary crushing of the water jet can not only reduce the crushing force required by the pick, but increase the crushing force required by the pick; When the action point of the jet and the action point of the pick coincide, the auxiliary crushing of the water jet can effectively reduce the crushing force required by the pick. Compared with the crust broken cobalt crust, when the pressure of the water jet is 5 MPa , The cutting force needed by the declination decreases by about 50%. As the working pressure of the water jet system increases, the auxiliary crushing effect of the water jet system becomes stronger.