基于反馈控制的再省力千斤顶液压系统设计  

Design of Hydraulic System in Further Labor-saving Jack Based on Feedback Control

作　　者：张敬妹[1] 张春燕[2] 高飞 刘忠 ZHANG Jingmei;ZHANG Chunyan;GAO Fei;LIU Zhong(School of Mechanical Engineering,Changshu Institute of Technology,Suzhou Jiangsu 215500,China;School of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China;School of Mechanical Engineering,Nanjing Vocational University of Industry Technology,Nanjing Jiangsu 210046,China;School of Mechanical Engineering,Guilin University of Aerospace Technology,Guilin Guangxi 541004,China)

机构地区：[1]常熟理工学院机械工程学院,江苏苏州215500 [2]江苏科技大学机械工程学院,江苏镇江212003 [3]南京工业职业技术大学机械工程学院,江苏南京210046 [4]桂林航天工业学院机械工程学院,广西桂林541004

出　　处：《机床与液压》2021年第20期93-95,共3页Machine Tool & Hydraulics

基　　金：国家自然科学基金地区科学基金项目(51765014)。

摘　　要：传统液压千斤顶举升速度提高必然导致压下手柄所需的作用力增加,而减小压下手柄的作用力即提高省力程度时又会使其举升速度降低。针对传统液压千斤顶举升重物时存在的再省力与提速互相矛盾的缺陷,设计一种再省力千斤顶液压系统。将操作缸由传统系统的单作用缸变为双作用缸,运用反馈控制原理将系统输出即举升缸输出的高压油通过蓄能器引到系统输入端即操作缸的有杆腔,引入有杆腔的高压油对操作缸活塞产生向下的液压力,从而使压下手柄的作用力减小。详细介绍了系统节能、再省力设计方案,并分析了控制油路原理,得到所设计的再省力千斤顶液压系统可在不影响举升速度的前提下达到进一步省力、节能的效果,并可减小系统油箱体积。The increase in the lifting speed of traditional hydraulic jacks will inevitably lead to the increase in the force required to depress the handle,on the contrary,to reduce the force of the person depressing the handle,that is,to increase the degree of labor saving,will reduce the lifting speed.Aiming at the disadvantage of contradiction between labor saving and speed increasing of traditional hydraulic jacks when lifting objects,a hydraulic system of jack was designed for further labor-saving.In this system,the operation cylinder was changed from the single-acting cylinder of the traditional system to the double-acting cylinder;based on the principle of feedback control,the high-pressure oil from the lifting cylinder as the system output was drained into the rod cavity of the operating cylinder as the system input through the accumulator,the high-pressure oil drained into the rod cavity generated downward hydraulic pressure on the piston of operating cylinder,so the force of the person depressing the handle was reduced.The energy-saving and further labor-saving design scheme of the system was introduced in detail,and the hydraulic control principle of oil circuit was analyzed.The hydraulic system of the designed labor-saving jack can achieve the effect of further labor-saving and energy saving without affecting the lifting speed,and the system tank volume can be reduced at the same time.

关 键 词：反馈控制 再省力千斤顶 液压系统 

分 类 号：TH211.1[机械工程—机械制造及自动化]