可控式增压复合油缸设计及其性能分析

Design and Performance Analysis of Controllable Pressurization Compound Oil Cylinder

针对大压力、小压力行程的重型液压设备的结构尺寸大、油泵功率大、利用系数低、液压系统复杂等问题,提出一种压力随机可调、工作效率高、结构紧凑、性能稳定可靠的复合式高增压油缸结构。对比分析了复合缸液压机和普通单缸液压机的工作过程;论述了复合缸液压机的运行原理和设计要求;介绍了可控式增压复合油缸性能及应用。结果表明:通过增压缸将液压系统提供的压力油转换为增压油提供给主油缸,使其产生大的压力输出,可有效地减小设备主机尺寸;通过控制缸随时进行高低压转换,各阶段速度压力按需配置,实现成形工艺的最优搭配,成形周期缩短;可以提高油泵的利用系数,减小泵站装机容量;液压系统工作负荷低,性能稳定可靠,寿命长。

This paper proposes a novel composite high pressurization oil cylinder structure,with the advantages of adjustable pressure,high working efficiency,compact structure,stability and reliability,to overcome the large structural size,high oil pump power,low utilization coefficient and complex hydraulic system for the heavy hydraulic equipment of large pressure and small pressure stroke.It analyses the difference between the working process for compound cylinder hydraulic press and ordinary single cylinder hydraulic press,and discusses the operation principle and design requirements of compound cylinder hydraulic press.Then,analyses the performance and application of controllable pressurization compound oil cylinder.The result shows that the pressurization oil cylinder provides higher pressure oil to the main cylinder by the hydraulic system converting,and thus,can reduce the size of the equipment.The conversion between high and low pressure can be completed by the control cylinder according to the speed and pressure in each stage,and can optimize the forming process and reduce the forming time.Therefore,enhances the utilization coefficient of the oil pump,and reduces the installed capacity of the pump station.Furthermore,the hydraulic system has a low working load,stable and reliable performance,and long service life.