A study on properties of oil hydraulic multiple function cylinder

近年来，油压控制系统在矿业、土木工程、建筑等领域得到了广泛的应用。矿建工程对机械化机械的节能、安全和生产提出了更高的要求，本研究的目的是设计与机械化机械相对应的油压多功能缸。S将振动技术应用于多功能油缸。实验装置为两个单杆油缸、比例电磁阀和高速开关阀组成的油液控制系统，首先用扩展最小二乘法辨识系统。然后，在一定的恒定负载水平下，进行了电源压力、频率和偏置电压的变化实验。为了研究油压多功能油缸的切割效果，将系统的实验模型设为实际液压挖掘机，比较了振动油缸和无振动油缸的定量特性。结果表明，油压多功能油缸的使用效果与挖掘机的定量性能相对应。最后，在现场进行了油压多功能油缸挖掘机的试验研究。证实了油压多功能油缸具有与带有操作员的铲子相对应的有效切削力。

Recently, the oil hydraulic controlled system has been applied to the field of mining industry, civil engineering and construction industly. The robotized mechines have been required to improve labor-saving, safety and production in mining and construction works.The aim of this study is to design the oil hydraulic multiple function cylinder which corresponds to a part of the robotized machines.A vibration technique s employed to the oil hydraulic cylinder, which has multiple function. An apparatus of the experiment is an oil hydraulic controlled system with the two single-rod cylinders, proportional solenoid valve and high speed on-off solenoid valve.First, the system is identified by mean of an expanded least square method. Next, the experiment is made with variation of the supply pressure and the frequency and the bias voltage under some levels of the constant load. As a results, the quantitative fundamental properties, namely, the vibration amplitude, the feed speed, the frequency, the maximum pushing force and the acceleration, were obtained.Furtheremore, to investigate cutting effect of the oil hydraulic multiple function cylinder, the experimental model of the system was assumed as an actual hydraulic excavator, and the quantitative properties of the multiple function cylinder with vibration were compared with these of no-vibration cylinder. It was obtained that the effect of the oil hydraulic multiple function cylinder corresponds to the quantitative properties of the excavator.Final, the experiments of the oil hydraulic shovel with the oil hydraulic multiple function cylinder were carried out on the actual field. It was confirmed that oil hydraulic multiple function cylinder has the effective cutting force which corresponds to the shovel with a operator.