烧结压机的伺服油泵电控、液压系统设计

对现有烧结压机设备进行改进，采用伺服油泵系统替代电液比例阀控制系统，详细论证分析伺服油泵系统的工作原理、电气控制及PLC控制伺服电机流程，同时比较伺服油泵系统与普通比例阀系统在应用过程中的优缺点。改进后经客户使用，结果显示:烧结压机中伺服液压系统压力控制精度为±0.1 MPa，稳定了产品质量；噪音由65 dB降到45 dB，改善了工作环境；烧结压机油箱温度较没改进前降低12.5℃，节能效果明显；延长了液压元件的使用寿命，降低设备的维护成本；提高了烧结压机设备稳定性。 

Improvement of sintering press performance using newly electro-hydraulic control system of servo pump

According to detailed analyses of principles of the servo pump system and electric control and PLC (programmable logic controller) servo motor control, the existing sintering press is improved by using the servo pump system to replace the control system of the electro-hydraulic proportional value.After the improvements which are widely accepted by customer, it shows that the pressure control precision of servo hydraulic system in sintering press is ±0.1 MPa, the noise is reduced from 65 dB to 45 dB, and the tank temperature is lowered to 12.5℃than without improvement.It is also found that the hydraulic components life are extended, equipment maintenance cost is lowered and the stability of sintering press is improved.