The invention discloses a method for controlling the digging force of a hydraulic controlled vibratory excavator and a special servo valve, belonging to the control method of the digging force of the engineering machinery. The control circuit by controlling oil junction issued liquid can pulse signal to the hydraulic components of the pulse of the oil port, hydraulic actuator servo drive pulse left valve, throttle servo valve core port A-A and port B-B ring valve open, closed, main oil hydraulic oil through the valve ring intersection PQ A-A into the impact of hydraulic cylinder the left chamber, push the piston rod of the hydraulic cylinder impact to the right impact; the impact of the shift through the feedback device will reset back to the servo valve core to the right; at the same time, the impact of the shift by vibration amplifier amplitude dynamic impact instantaneous large digging force and static force, and additive effects in digging bucket teeth digging bucket, complete control of hydraulic vibration force digging method. Advantages: the machine has remarkable energy saving effect on complex ground such as hard ground, mine, crushed stone ground, rock, earthquake, ground and frozen ground.
【技术实现步骤摘要】
【技术保护点】
１．一种液控振动挖掘机挖力的控制方法，其特征是：控制方法为：控制油路的液压油通过控制油路口ＰｋＱｋ发出液能脉冲信号到脉冲液压执行部件，脉冲液压执行部件推动伺服阀芯左移，伺服阀芯的环形阀口Ａ－Ａ打开，同时环形阀口Ｂ－Ｂ关闭，主油路的液压油经过主油路口ＰＱ通过环形阀口Ａ－Ａ进入耐冲击液压缸的左腔，推动耐冲击液压缸的活塞杆向右移产生冲击力；该右移的冲击力通过反馈装置将伺服阀芯向右拉回复位；同时，该右移的冲击力被振动放大器放大振幅形成瞬间大的动态冲击挖力，并与静态挖力叠加作用在挖斗的斗齿上，完成液控振动挖力方法的控制。
【技术特征摘要】
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