液压伺服技术在推进式铝锭加热炉节能改造中的应用

Application of Hydraulic Servo Technology in Energy-saving Retrofit of Pusher-Type Aluminum Ingot Heating Furnace

摘要

为降低推进式铝锭加热炉的电耗，针对其液压系统在待机及小流量工况下空载与溢流能量浪费严重的问题，分析了现有定频异步电机驱动轴向柱塞变量泵的工作原理及能耗机理，采用伺服控制器和伺服电机替换原有接触器及定频异步电机、保留原轴向柱塞变量泵的改造方案。实际运行数据表明：改造后系统压力响应时间小于0.1 s，满足各工况需求；三台泵综合节能率达29.4%，待机功耗显著降低，油温下降4~5℃，冷却负荷同步减小。验证了该伺服改造方案在铝加工加热炉设备中的可行性与显著经济效益。

Abstract

To further reduce the power consumption of pusher-type aluminum ingot heating furnaces, an analysis of the existing hydraulic system’s working principle and a comparison of current energy-saving technologies led to the adoption of a retrofit solution: replacing the original contactors and asynchronous motor with servo controllers and servo motors, while retaining the original axial piston pump. Operational data show that after the retrofit, the system achieves pressure response within 0.1 seconds, meeting operational requirements. The overall energy efficiency of the hydraulic system improved by 29.4%, while system response speed increased and oil temperature decreased, confirming the feasibility and economic benefits of servo-based retrofits in heating furnace equipment.

关键词

加热炉 / 液压系统 / 伺服控制 / 变量泵

Key words

heating furnace / hydraulic system / servo control / energy-saving retrofit / variable displacement pump

参考文献

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