卧式多层热压机变量泵功能特性和液压系统性能  

Analysis of variable pump function characteristics and hydraulic system performance of horizontal multi-opening hot press

作　　者：花军[1] 郑旋 张红良 杨舒 HUA Jun;ZHENG Xuan;ZHANG Hongliang;YANG Shu(College of Mechanical Electronical and Engineering,Northeast Forestry University,Harbin 150040,China;Shanghai Qiulin Machinery Co.Ltd.,Shanghai 201800,China)

机构地区：[1]东北林业大学机电工程学院,哈尔滨150040 [2]上海秋林机械有限公司,上海201800

出　　处：《林业工程学报》2024年第5期153-160,共8页Journal of Forestry Engineering

基　　金：国家林业局林业科技成果国家级推广项目(2016-34);山西秋林机械有限公司校企合作项目(QL2021110901)。

摘　　要：根据年产10万m^(3)胶合板卧式多层热压机结构、工作原理和热压工艺要求,采用型号VPCLRDU2斜盘式轴向变量柱塞泵作为动力和控制元件,快速油缸与加压油缸采用伸缩式二级油缸结构形式作为执行元件,构建了其双变量泵液压系统。以该液压系统为研究对象,根据VPCLRDU2工作原理建立其仿真模型,设计台架试验,为分析VPCLRDU2效率和控制功能特性,验证其所建仿真模型的准确性奠定了基础;通过VPCLRDU2效率和电液比例、恒功率、恒压控制功能特性研究分析,证明了其具有容积效率、总效率和功能集成化程度高的特性;VPCLRDU2仿真模型与台架试验对比分析结果趋于一致,验证了其所建仿真模型准确、可靠;根据双变量泵液压系统工作原理,建立其液压系统仿真模型,对于不同板坯参数、热压工艺要求,其仿真模型结果验证了该系统能够实现对快速油缸速度、位移和加压油缸压力的控制,满足了胶合板卧式压机热压工艺要求,具有能耗低、稳定性高的特性。This study focused on investigating the pump function characteristics and hydraulic system performance of the horizontal multi-opening hot press with an annual production of 100000 m^(3) of plywood.Based on the structure and requirements of the horizontal multi-opening hot press,the swash plate axial variable displacement piston pump VPCLRDU2 was used as the power and control components,the telescopic two-stage cylinder structure was adopted for the fast cylinder,and the pressure cylinder was utilized as the actuator.A dual-variable pump hydraulic system was constructed.Taking the hydraulic system as the research object,according to the working principle of VPCLRDU2,the simulation model was established and the bench test was designed,which laid a foundation for analyzing the efficiency and electro-hydraulic ratio,torque limitation and pressure compensator control functions of VPCLRDU2 and verifying the accuracy of VPCLRDU2 simulation model.Through the analysis of VPCLRDU2 efficiency and the functional control characteristics,when the rated pressure of VPCLRDU2 reached 35 MPa,its volumetric efficiency was 96%and total efficiency was 91%,which met the efficiency requirements of factory acceptance tests and proved that the pump has high efficiency characteristics.In the electro-hydraulic proportional control stage,the flow was linearly related to the control current.In the torque limitation and pressure compensator control stages,it can adjust the flow according to the load pressure change,which helped to avoid motor overload and flow loss,showing that the simulation model can realize the functional control and high functional integration.The simulation results were basically consistent with the bench test results,validating the high accuracy of the model.According to the working principle of the dual variable pump hydraulic system,the simulation model of the hydraulic system was developed.The results showed that the steady-state error of the speed control system was about 1%,and its closing and opening time were le

关 键 词：卧式多层热压机 斜盘式轴向变量柱塞泵 双变量泵液压系统 能耗 稳定性 

分 类 号：TH322[机械工程—机械制造及自动化] TH137.7