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1.故障现象1台SR220C型旋挖钻机(见图1)施工时,右手柄控制动作无法从加压模式切换到变幅模式,由此导致无法施工。该旋挖钻机加压变幅控制系统是一个高度集成化的系统。该系统将动力头下降、提升和变幅向前、向后4个动作集成在右手柄前推和后拉2个方向上。当右手柄为加压模式时,其手柄前推和后拉分别对应动力头下降和动力头提升;当右手柄为变幅
1. Fault phenomenon 1 SR220C rotary drilling rig (see Figure 1) construction, the right handle control action can not be switched from pressurized mode luffing mode, resulting in construction can not be. The rotary drilling rig pressurized luffing control system is a highly integrated system. The system will power head down, lift and amplitude forward, backward 4 moves integrated in the right handle forward push and pull in two directions. When the right handle is in pressurized mode, the handle forward push and pull pull respectively correspond to the power head descend and power head lift; when the right handle is luffing