电和液压——液驱电控、液驱电动和电驱

张海平

（上海 hpzhang856@126.com）

摘要：该文指出，电和液压的关系，并不是简单的取代或不会被取代的关系，应该分别从电控、电动、电驱这三方面来考察认识，从而分别确定对策。电控是液压的指挥。电动为液压提供机械能，是液压的后台。电驱，电动机直接驱动负载，不经过液压传动。只有这才是可能取代液压的竞争对手。在大推力平动，电驱还远落后于液压。而在转动，已经开始挤占液压的市场。

关键词：液压；液驱电控；液驱电动；电驱

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0001-06

Electricity to Hydraulics—Hytronic， Hydraulic-electrification， Electric-direct-driven

ZHANG Hai-ping

（Shanghai， hpzhang856@126.com）

Abstract: This paper pointed out, that the relation of electricity to hydraulics is not simple whether replace or not. It should be divided to hytronic, hydraulic-electrification and electric-direct-driven, to analyze and take different solutions.

Key words: hydraulic; hytronic; hydraulic-electrification; electric-direct-driven

基于改进EEMD方法的工程机械液压

系统冲击振动信号研究

高立龙，井祥鹤，陈欣鹏，李九林

（陆军炮兵防空兵学院士官学校,辽宁沈阳110000）

摘要：工程机械液压系统发生冲击故障时，振动信号会出现相应的时频特性的变化，准确捕捉液压缸冲击振动信号，提取信号的典型特征是故障诊断的关键。该文首先运用SVM延拓解决EEMD方法的端点效应，然后通过改进的三次样条插值方法拟合包络线，再利用互相关分析与频谱分析对特征模态分量进行筛选，选取出能够代表信号特征的IMF分量。最后使用改进的EEMD方法对液压系统突然换向引起的冲击振动信号进行分析，选取出能够代表信号特征的IMF分量，为以后的智能诊断故障特征提取提供依据。

关键词：SVM；EEMD；液压冲击；故障诊断

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0006-04

Study on Impact Vibration Signal of Construction Machinery Hydraulic

System Based on Improved EEMD Method

GAO Li-long, JING Xiang-he, CHEN Xin-peng, LI Jiu-lin

(Noncommissioned Officer Academy, Army Artillery and Air Defense Forces Academy, Shenyang110000, China)

Abstract: When the hydraulic system has a shock fault, the vibration signal will change with the corresponding time-frequency characteristics. The key to fault diagnosis is to accurately capture the shock vibration signal of the hydraulic cylinder and extract the typical characteristics of the signal. In this paper, SVM extension is applied to solve the endpoint effect of EEMD method, then the envelope is fitted by the improved cubic spline interpolation method, and the characteristic modal components are screened by cross correlation analysis and spectrum analysis to select the IMF components that can represent the signal characteristics. Finally, the improved EEMD method is used to analyze the shock vibration signal caused by the sudden reversal of the hydraulic system, and the IMF component that can represent the signal characteristics is selected to provide the basis for the intelligent fault diagnosis feature extraction in the future.

Key words: SVM; EEMD; hydraulic impact; fault diagnosis

超高压海水泵配流阀动态特性仿真研究

韦春辉¹，冀宏^1,2，张培珍¹，刘世琦¹，朱奕¹

（1.兰州理工大学能源与动力工程学院，甘肃兰州730050；

2.甘肃省液压气动工程技术研究中心，甘肃兰州730050）

摘要：针对超高压海水泵配流阀运动滞后所引起海水泵容积效率降低的问题。分析了导致配流阀滞后的主要原因，建立了数学模型，运用AEMSim软件进行仿真。研究结果表明：随着余隙容积的增大，配流阀开启滞后现象越明显。随着吸液阀阀芯质量增加，对阀芯开启滞后影响较小，关闭滞后影响较大。在设计超高压海水泵时，要尽量减小柱塞腔的余隙容积和减小配流阀阀芯质量。

关键词：超高压；海水泵；配流阀；动态特性

中图分类号：TH137；TH322文献标志码：A文章编号：1008-0813（2020）03-0010-03

Dynamic Characteristics of Distributing Valves in Super-high Pressure Seawater Pump

WEI Chun-hui¹, JI Hong^1,2, ZHANG Pei-zhen¹, LIU Shi-qi¹, ZHU Yi¹

（1. College of Energy and Power Engineering， Lanzhou University of Technology， Lanzhou730050, China；

（2. Research Center for Hydraulics and Pneumatics of Gansu Province， Lanzhou730050, China）

Abstract:  Focus on the problem that the volume efficiency of the super-high seawater pump decreases due to the lag of the valve movement of super high pressure seawater pump. The main reasons leading to the lag of the valve are analyzed, and the mathematical model is established. The simulation is carried out by using AEMSim software. The results show that with the increase of clearance volume, the opening lag of distributing valves becomes more obvious. With the mass of the suction valve spool increases, the influence on the opening lag of the spool is small, and the closing lag has a greater influence. When designing the super-high pressure seawater pump, the clearance volume of the plunger cavity and the mass of the pool should be reduced as much as possible.

Key words: super-high pressure; seawater pump; distributing valves; dynamic characteristics

高压气体单向阀优化设计

邢志胜，叶鹏，李金禄，金丽琼，崔东

（合肥通用机械研究院,安徽合肥230031）

摘要：该文对高压空气干燥系统中单向阀密封失效的原因进行了分析计算，为高压气体单向阀密封失效的分析及改进提出了可借鉴的经验。

关键词：高压空气；干燥系统；单向阀；设计

中图分类号：TH138文献标志码：A文章编号：1008-0813（2020）03-0014-03

Optimized Design of High Pressure Gas Check Valve

XING Zhi-sheng, YE Peng, LI Jin-lu, JIN Li-qiong, CUI Dong

（Hefei General Machinery Research Institute, Hefei230031, China）

Abstract: In this paper, the reasons for the failure of the check valve seal of high pressure air drying system are analyzed and calculated, The experience of the failure analysis and improvement of the valve seal is put forward.

Key words: high-pressure air; drying system; check valve; design

渐扩型流道空化特征的实验研究

赵鹏坤，林言丕，李清华，郑直

(兰州理工大学能源与动力工程学院，甘肃兰州730050)

摘要：渐扩型流道是液压元件中最常见的一种阀口结构，为了研究渐扩型阀口结构中的空化流动特征，该文设计了一种渐扩型阀口流道结构，通过实验研究了随进口压力的提升，阀口空化现象的变化。实验研究发现，空化首先出现在阀口拐角上侧；随着进口压力的提升，空化体积向着类三角形形态发育；渐扩型阀口空化体积随进口压力的提升，呈线性分布。

关键词：渐扩型流道;进口压力;线性分布；研究

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0016-04

Experimental Research on Cavitatiing Characteristics of the Gradually Expanding Channel

ZHAO Peng-kun, LIN Yan-pi, LI Qing-hua, ZHENG Zhi

(School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou730050, China)

Abstract: In order to study the characteristics of cavitating flow in the structure of gradually expanding valve orifice, this paper designs a structure of gradually expanding valve orifice, and studies the change of valve orifice cavitation with the increase of inlet pressure through experiments. The experimental results show that the cavitation first appears at the upper corner of the valve mouth; with the increase of the inlet pressure, the cavitating volume develops toward a triangular shape; and with the increase of the inlet pressure, the cavitation volume of the gradually expanding valve mouth presents a linear distribution.

Key words: gradual expansion channel; inlet pressure; linear distribution; research

工作压力和吸油压力对齿轮泵极限转速的影响

杨国来，武彩娥

（兰州理工大学能源与动力工程学院，甘肃兰州730050）

摘要：为研究工作压力和吸油压力对齿轮泵极限转速的影响，该文应用Pumplinx软件建立了齿轮泵仿真模型，分别数值模拟分析了不同工作压力和不同吸油压力对齿轮泵极限转速的影响。通过分析得知：工作压力对泵极限转速的影响不大，吸油压力对泵极限转速有较大影响。

关键词：齿轮泵；极限转速；吸油压力；工作压力

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0020-04

Influence of Suction Pressure and Working Pressure on the Gear Pump Limit Speed

YANG Guo-lai, WU Cai-e

（School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou730050, China）

Abstract: In order to study the influence of working pressure and suction pressure on the limit speed of gear pump, this paper uses Pumplinx software to establish the gear pump simulation model, and numerically simulates the influence of different working pressure and different suction pressure on the limit speed of gear pump. According to the analysis, the working pressure has little effect on the limit speed of the pump, and the suction pressure has a great influence on the limit speed of the pump.

Key words: gear pump; limit speed; suction pressure; working pressure

螺杆式空气压缩机智能控制技术研究与应用

许桂云¹，董明²，王永红²

(1.重庆机电职业技术大学机械工程学院，重庆402760；2.四川华荣能源股份有限公司，四川攀枝花617014）

摘要：根据国家关于空气压缩机节能降耗及智能化控制要求，针对空气压缩机耗能运行现状、控制方式落后等问题，采用PID控制器、PLC智能控制、工业以太网等技术，设计了空气压缩机组智能控制系统。实现空压机组节能降耗、智能控制、远程监控、无人值守等功能，对于企业设备自动化化管理及经济安全运行具有重要意义。

关键词：空气压缩机；节能改造；在线检测；智能监控

中图分类号：TH138;TH45文献标志码：A文章编号：1008-0813（2020）03-0024-04

Research and Application of Intelligent Control Technology for Screw Air Compressor

XU Gui-yun¹, DONG Ming², WANG Yong-hong²

(1. School of Mechanical Engineering， Chongqing Vocational and Technical University of Mechatronics，Chongqing402760, China；

2. Sichuan Huarong energy Limited by Share Ltd.， Panzhihua617014, China）

Abstract: According to the national requirements on energy saving and intelligent control of air compressor, the intelligent control system of air compressor is designed by adopting PID controller, PLC intelligent control, industrial Ethernet and other technologies, aiming at the problems of energy consumption and backward control mode of air compressor. The realization of energy-saving, intelligent control, remote monitoring, unattended and other functions of air compressor unit is of great significance for the automatic management of enterprise equipment and safe operation of economy.

Key words: air compressor; energy-saving reform; on-line measuring; intelligent monitoring

航天电液伺服系统直流无刷电机控制驱动策略研究

张小红，曹英健

（北京精密机电控制设备研究所，北京100076）

摘要：该文研究了一种以FPGA为控制核心，采用DSP与FPGA协同处理的基于旋转变压器的电动液压伺服无刷电机驱动系统的设计技术，并根据三冗余能源压力对电机实现宽范围的速度伺服控制，带动定量泵以调速方案对压力和流量进行实时动态控制，具有高转速、高可靠性和低能耗的特点，系统能耗降低了近50%，重量降低了近20%。

关键词：直流无刷电机；控制驱动；电液伺服系统; 研究

中图分类号：TH137;V44文献标志码：A文章编号：1008-0813（2020）03-0027-05

Research on the Control and Drive Strategy of DC Brushless Motor in Aerospace

Electro-hydraulic Servo System

ZHANG Xiao-hong, CAO Ying-jian

(Beijing Research Institute of Precise Mechanical and Electronic Control Equipment, Beijing100076, China)

Abstract: The research of integrative servo driving technology of electro-hydraulic servo system uses the scheme of BLDC motor， which is based on the resovler to fit the harsh working condition. It uses the scheme of DSP and FPGA coprocessing together.  The system varies the motor speed in a wide range depending on the three redundancy pressure signals， then the motor brings along a quantitative pump to compensate the changing pressure and flux. It has the characteristics of high speed, high reliability and low power consumption. The consumption is reduced by 50%, while the weight is reduced by 20%.

Key words: BLDC; control driven; electro-hydraulic servo system; research

一种液压摩擦焊机电液系统研究与试验

徐韬¹，周灿丰²

（1.中铁第六勘察设计院集团有限公司，天津300308; 2.北京石油化工学院，北京102617）

摘要：针对海上石油平台、海底输送管线维修的需要，提供了一种液压摩擦焊机液压和电器系统设计思路，通过参数计算、电液控制系统设计，研发了一种液压摩擦焊机，通过对DH38钢摩擦叠焊单元成型工艺试验，发现焊接接头拉伸强度达到了母材强度的76%以上，验证了液压摩擦焊机的可靠性能，通过该研究的应用，可对海上石油平台、海底输送管线的维修起到积极作用。

关键词：水下摩擦焊；电控系统；液压系统；工艺试验

中图分类号：TH137;U442文献标志码：A文章编号：1008-0813（2020）03-0032-04

Research and Test on the Electro-hydraulic System of a Hydraulic Friction

Welding Machine

XU Tao¹, ZHOU Can-feng²

（1. China Railway Liuyuan Group Co.， Ltd., Tianjin300308, China；

2. Beijing Institute of Petroleum and Chemical Engineering, Beijing102617, China）

Abstract: According to the needs of offshore oil platform and submarine transmission pipeline maintenance, a design idea of hydraulic and electrical system of hydraulic friction welding machine is provided. Through parameter calculation and electro-hydraulic control system design, a hydraulic friction welding machine is developed. Through the forming process test of dh38 steel friction stack welding unit, it is found that the tensile strength of welding joint reaches more than 76% of the base metal strength, which verifies the hydraulic strength Through the application of this research, it can play a positive role in the maintenance of offshore oil platform and submarine pipeline.

Key words: underwater friction welding; electric control system; hydraulic system; process test

某特种车同步举升锁紧液压系统优化设计研究

虞军胜，曾毅，刘士成

Optimum Design of Synchronized Lifting and Locking Hydraulic System for a Special Vehicle

YU Jun-sheng, ZENG Yi, LIU Shi-cheng

（北京航天发射技术研究所，北京100076）

摘要：针对某特种车原有的上装同步举升锁紧液压系统存在同步精度不达标、举升锁紧机构太复杂等问题，制定了对应的系统优化改进方案。改进后的同步举升液压系统，运用双向比例调速桥路和主从同步控制方式，结合PID控制算法，制定了主从同步闭环控制流程，有效提高了系统抗干扰能力和同步精度，改进后的同步举升误差满足设计要求。改进后的锁紧液压系统，运用机械自锁液压缸替代原辅助支撑锁紧机构，有效减少了锁紧回路元件数量，降低了系统成本，提高了锁紧可靠性，并通过台架试验验证了改进方案的有效性。

关键词：同步控制；锁紧液压系统；PID控制；设计

中图分类号：TH137文献标志码：B文章编号：1008-0813（2020）03-0036-05

水电站电液调速器数字化技术改造

林义忠¹，陈旭¹，黄益民²

（1.广西大学机械工程学院，广西南宁530000； 2.南宁勤海自动控制设备有限公司,广西南宁530000）

摘要：针对传统水电站水轮机调速器可靠性差、响应慢、故障率高等问题，设计并开发一种以系统可直接推动接力器，从而减少液压放大器等中间环节。依靠蓄能器作为辅助动力源对导叶开度进行调整以达到调节水轮机转速的目的。该系统具有实时性好、控制抗干扰能力强、可靠性高、操作简单等优点，并可与电站的微机监控系统联网，方便监控与管理。

关键词：水轮机调速器；液压系统；数字液压阀；可靠性

中图分类号：TH137;TV734.4文献标志码：A文章编号：1008-0813（2020）03-0040-04

Digitized Transformation of Electro-hydraulic Governor for Hydropower Station

LIN Yi-zhong¹, CHEN Xu¹，HUANG Yi-min²

(1. College of Mechanical Engineering, Guangxi University, Nanning530000, China;

2. Nanning Qinhai Automatic Control Equipment Co., Ltd., Nanning530000, China)

Abstract: In order to solve the problems of poor reliability, slow response and high failure rate of the governor in the traditional hydro-turbine governor of hydropower stationhydropower, the system is designed and developed which can push the control ring directly, thus reducing the intermediate links such as the hydraulic amplifier. By using the accumulator as the auxiliary power source, the guide vane opening can be adjusted to adjust the turbine speed. The system has the advantages of good real-time performance, strong anti-interference control ability, high reliability and simple operation, and can be connected with the microcomputer monitoring system of the power station to facilitate monitoring and management.

Key words: turbine governor; hydraulic system; hydraulic digital valve; reliability

基于极点配置的推力矢量伺服系统控制策略研究

许文波，李彧，焦玮玮

（北京精密机电控制设备研究所，北京100076）

摘要：针对推力矢量伺服系统提出了一种采用状态反馈对系统极点进行配置的方法，同时采用该方法设计了Luenberger状态观测器，在此基础上实现了伺服系统的稳态控制。通过仿真和实验表明，采用该方法设计的推力矢量伺服系统的性能优于基于输出反馈的PI-陷波滤波控制的系统性能。

关键词：推力矢量；伺服系统；状态反馈；Luenberger观测器；极点配置

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0044-04

Study on the Control Strategy of Thrust Vector Control Servo System with Poles Placement

XU Wen-bo, LI Yu, JIAO Wei-wei

(Beijing Research Institute of Precise Mechatronics and Controls, Beijing100076, China)

Abstract: A method for poles placement with state feedback of thrust vector control servo system, at the same time, a Luenberger observer is designed by the method. On this basis, the stability control of the system is realized. The simulation and experiment show that the performance of the system based on poles placement is better than that of PI-notch filtering control based on output feedback.

Key words:thrust vector control; servo system; state feedback; luenberger observer; pole-placement

浅谈生产车间压缩空气系统的设计

李再有

（中国煤炭科工集团太原研究院有限公司，山西太原030006）

摘要：简单介绍了各类型空气压缩机的工作原理和优缺点，对空压机进行了选型，同时结合车间使用压缩空气的特点、耗气量等进行分析，设计了一套适用于生产车间的压缩空气系统，为生产车间使用压缩空气提供了便利。

关键词：车间；压缩空气；空压机；管道；设计

中图分类号：TH138文献标志码：A文章编号：1008-0813（2020）03-0048-03

Discussion on the Design of Compressed Air System for

Production Work Shop

LI Zai-you

（CCTEG Taiyuan Research Institute Co., Ltd., Taiyuan030006, China）

Abstract: This paper introduces the working principle, advantages and disadvantages of each type of air compressor, selects the type of air compressor, and analyzes the characteristics of using compressed air in the workshop, the air consumption and the layout of the workshop.

Key words: workshop； compressed air； air compressor； pipe； design

基于ISO 19973的气动换向阀可靠性试验研究

任志胜，刘丽娇，毛乾晖，郭丽丽，吕静霞

（国家气动产品质量监督检验中心, 浙江奉化315500）

摘要：该文通过分析2007版和2015版ISO 19973关于气动换向阀可靠性试验方法及要求，研制出一套气动换向阀可靠性试验台，给出循环频率、工作气口容器等的确定方法，完成了可靠性试验及数据分析，得到了可靠性模型及评价指标。试验结果验证了ISO 19973：2015标准相关方法的可行性，为国内气动换向阀可靠性试验及标准制订提供参考。

关键词：气动换向阀；可靠性；Weibull分布；ISO 19973

中图分类号：TH138.51文献标志码：A文章编号：1008-0813（2020）03-0050-05

Reliability Test of Pneumatic Directional Valve Based on ISO 19973

REN Zhi-sheng, LIU Li-jiao, MAO Qian-hui, GUO Li-li, LV Jing-xia

(National Quality Supervision and Inspection Center of Pneumatic Products, Fenghua315500, China)

Abstract: By analyzing the reliability test methods and requirements of pneumatic directional valve in the 2007 and 2015 editions of ISO 19973, this paper developed a test bed of pneumatic directional valve for reliability, gave the methods for determining cycling frequency and volume at the outlet ports, completed reliability test and data analysis, obtained the reliability model and evaluation indexs. The test results have verified the feasibility of relevant methods in ISO 19973:2015, and provide reference for reliability test and setting standards of our pneumatic directional valve.

Key words: pneumatic directional valve; reliability; weibull distribution; ISO 19973

浅谈某型机起落架选择阀

朱伟，张婷，张凯

Talking about the Landing Gear Selector Valve of a Certain Type

ZHU Wei, ZHANG Ting, ZHANG Kai

（中航西飞民用飞机有限责任公司,陕西西安710089)

摘要：起落架收放系统是飞机的一个重要子系统，负责在飞机起飞离地后收上起落架和着陆前放下起落架，起落架选择阀是起落架收放系统中的关键执行部件，接收来自起落架收放控制单元的收放指令，通过阀芯的换向，实现收、放液压油路方向的切换，实现起落架的收、放控制功能，一般起落架选择阀为三位四通电磁换向阀，原理虽然简单，但是在设计过程中，还是有很多需要特别关注的地方，否则，设计出的起落架选择阀可能会对液压系统、飞控系统造成严重影响。

关键词：选择阀；起落架；收放；飞机

中图分类号：TH137文献标志码：B文章编号：1008-0813（2020）03-0055-03

动力电池冷却系统流量分配特性研究

王普浩¹，李立涛²，蔺强²，张晓光¹，毛梦娜¹，吕海峰¹

(1.中北大学机械工程学院，山西太原030000; 2.河北亚大汽车塑料制品有限公司，河北涿州072761）

摘要：利用CATIA软件建立动力电池冷却系统的内部流体域几何模型，通过STAR CCM+软件对乙二醇冷却液的流动情况进行模拟，得出流场的流量分配情况及其压力损失值。理论分析冷却液的流动机理，并结合数值模拟结果对冷却系统流体域的几何结构模型进行优化改进。由于流场的流体分配主要受阻力作用和分流、汇流作用的影响，通过重置管路布置的方式来调节分流、汇流作用，改变进出口五通接头及排出（吸入）Y型三通接头等连接件的结构参数来调整各流道流动阻力，使系统内进行换热的各冷却液流道流量分配达到均匀。系统优化后的流量分配情况良好，各流道内流体的速度趋于一致，故各流道汇流时所产生的湍流混合冲击损失减少，降低了流体阻力损失。

关键词：流量分配；数值模拟；冷却系统；流体阻力

中图分类号：TH137；TB65文献标志码：A文章编号：1008-0813（2020）03-0057-07

Study on Flow Distribution Characteristics of Power Battery Cooling System

WANG Pu-hao¹, LI Li-tao², LIN Qiang², ZHANG Xiao-guang¹, MAO Meng-na¹, LYU Hai-feng¹

(1. School of Mechanical Engineering， North University of China， Taiyuan030000, China;

2. Hebei Chinaust Automotive Plastics Corp., Ltd.， Zhuozhou 072761, China)

Abstract: Geometry internal fluid model using CATIA software to establish a power battery cooling system by STAR CCM+ software glycol coolant flow simulation, the flow rate distribution obtained pressure loss and the flow field. Theoretical Analysis of the mechanism of flow of the coolant, and the results of the numerical simulation model of the geometry of the cooling system is optimized to improve the fluid domain. Since the fluid distribution in the flow field is mainly affected by the resistance and the effects of the diversion and confluence. Adjust the shunting and confluence by resetting the piping arrangement. Change the structural parameters of the connecting parts such as the inlet and outlet five-way joints and the discharge (intake) Y-type three-way joints to adjust the flow resistance of each flow channel. Each coolant channel flow distribution within the heat exchange system to achieve uniformity. The flow distribution after system optimization is good, and the velocity of the fluid in each flow channel is basically the same, so the turbulent mixed impact loss generated when the fluids of each flow channel merge is reduced, and the fluid resistance loss is reduced.

Key words: flow distribution; numerical simulation; cooling system; fluid resistance

基于液压油超低温特性的加热及保温系统

设计仿真和试验分析

彭立广，焦悦，丘铭军

(中国重型机械研究院股份公司，陕西西安710032)

摘要：液压系统因其独特的优势，广泛应用在各个工业领域。液压源是液压系统中的重要组成部分之一，其油液温度的控制对系统产生至关重要的影响，该文针对超低温条件下某军工车辆液压缸运动速度过慢，不能满足实际使用要求的状况，设计了一套低温试验系统和加热保温装置，验证液压缸速度过慢的原因，并保证了液压系统的温度控制且通过了试验验证。

关键词：液压油；温控；加热；超低温试验

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0064-06

Design Simulation and Test Analysis of Heating and Heat Preservation System

Based on Hydraulic Oil Ultra-low Temperature Characteristics

PENG Li-guang, JIAO Yue, QIU Ming-jun

(China National Heavy Machinery Research Institute Co., Ltd., Xian710032, China)

Abstract: Because of its unique advantages, hydraulic system is widely used in various industrial fields. The hydraulic source is one of the important parts of the hydraulic system, and the control of its oil temperature has a crucial impact on the system. In view of the fact that the hydraulic cylinder of a military vehicle moves too slowly under the ultra-low temperature condition, which cant meet the actual use requirements, this paper designs a set of low temperature test system and heating and heat preservation device to verify the cause of the slow speed of the hydraulic cylinder, and to ensure the temperature control of the hydraulic system, which has passed the test verification.

Key words: hydraulic oil; temperature control; heat; ultra-low temperature test

流量伺服阀作压力控制的非典型应用

何汉林

（穆格控制系统（上海）有限公司，上海200120）

摘要：文章提出并分析了一种用力反馈式流量伺服阀与手动节流阀配合使用，从而对负载进行压力控制的液压桥路。该桥路本质为C型半桥：伺服阀单腔输出，节流阀通过调节回油液阻来调节负载腔压力的起始点，伺服阀根据负载需求改变流量输出。整个压力控制回路为纯机械式控制，稳定可靠，精度可达0.1 bar。

关键词：伺服阀；压力控制；C型半桥；机械式

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0069-03

Atypical Application of Flow Servo Valve for Pressure Control

HE Han-lin

(MOOG Control System (Shanghai) Ltd., Shanghai200120, China)

Abstract: This paper presents and analyses a hydraulic bridge with force feedback flow servo valve and manual throttle valve for pressure control. The essence of the bridge is C-type half-bridge: single-chamber output of servo valve, throttle valve adjusts the starting point of load pressure by adjusting return resistance, servo valve changes flow output according to load demand. The whole pressure control loop is pure mechanical control, stable and reliable, and the accuracy can reach 0.1 bar.

Key words: servo valve; pressure control; C half-bridge; mechanical type

一种液压剪板机压紧油缸设计

罗相文，陈国扬，吴映霞

（广东南方职业学院，广东江门529040）

摘要：分析液压剪板机压脚经常漏油的弊端，改进设计了一型压脚油缸产品，具有防止漏油，油封长寿命，可承受一定径向力等特点。

关键词：压脚；液压剪板机；压紧油缸；设计

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0072-02

One Press Hydraulic Cylinder Design for Hydraulic Cutting Machine

LUO Xiang-wen, CHEN Guo-yang, WU Ying-xia

（Guangdong Nanfang Vocational College, Jiangmen529040, China）

Abstract: Analyse the press cylinder oil-leaking of Hydraulic Cutting machine, Improve and design one new press cylinder product. Can seal the oil,. long live oil-seal, and can endure the radial force else.

Key words: press cylinder foot; hydraulic cutting machine; press hydraulic cylinder; design

连铸机液压系统油液状态监测实例分析

张德明

（盐城市联鑫钢铁有限公司，江苏盐城224100）

摘要：该文对连铸机液压系统所用抗燃液压油的使用状态进行了分析，确定了换油指标，并把油液的使用状态与液压设备的运行状态联系起来，进而对液压设备的管理提供了指导意见。

关键词：连铸机液压系统；抗燃液压油；状态监测；实例分析

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0074-02

Example Analysis of Oil State Monitoring for Conticaster Hydraulic System

ZHANG De-ming

（Yan Cheng Sity LianxinSteel Limited Company, Yancheng224100, China）

Abstract: The paper analyses the fire-resistant oil using state of Conticaster Hydraulic Systems, makes the changing oil indicant sure, links the oil using state with the operating state of a hydraulic equipment, and provides instructions to management of a hydraulic equipment.

Key words: conticaster hydraulic systems; the fire-resistant oil; state monitoring; example analysis

某型飞机收放作动筒密封圈失效对负载特性的影响分析

陈运好

（中航西飞民用飞机有限责任公司，陕西西安710089）

摘要：某型飞机在空中出现前起落架正常放下后无法锁定的故障，分解过程中发现驱动装置收放作动筒内一处密封圈失效。文中针对收放作动筒内密封圈的性能参数，结合前起落架的收放原理，建立了收放机构力学模型和密封圈的有限元模型，开展了失效密封圈对作动筒的工作行程、输出力、两腔压力变化等负载特性的影响分析，并给出结论，该结论可作为本次故障调查的理论依据，同时文中的分析方法对其他飞机的类似故障分析有一定的借鉴意义。

关键词：收放作动筒；密封圈；失效；负载特性

中图分类号：TH137；TB42文献标志码：A文章编号：1008-0813（2020）03-0076-04

Influence of the Retractable Actuator Sealing Ring Failure on the

Load Characteristics for an Aircraft

CHEN Yun-hao

(AVIC XAC Commercial Aircraft Co., Ltd., Xi’an710089, China)

Abstract: After the nose landing gear not locked down normal fault of an aircraft appeared in the sky, decomposition found during retraction actuator drive a cylinder seal failure. This paper performance parameters for the retraction actuator cylinder seals, combined with retractable nose landing gear principle, the establishment of institutions retractable mechanical model and finite element model of seal rings, seals the failure to carry out the work of the actuator stroke the impact load characteristics of the output power, two-chamber pressure changes are analyzed, and the conclusion, the conclusion can be used as a theoretical basis for this failure investigation, as well as analysis of the text has some reference for similar failures of other aircraft in the analysis.

Key words: retractable actuator; seals; failure; load characteristics

电液伺服阀自动化配研磨技术研究

朱西薇，车飞，方兵，汪东政

（湖北三江航天红峰控制有限公司,湖北孝感432000）

摘要：该文主要针对伺服阀装配过程中，阀芯阀套依赖于工人技术和手感，无量化考核标准、一致性差的问题开展研究，针对现有的工艺方法，优化工艺流程，开发自动化设备，并对自动化选配后的零件尺寸、伺服阀性能进行探索，证明自动化技术应用于伺服阀阀芯阀套选配方案可行。

关键词：阀芯；阀套；自动化；配研磨

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0080-05

Research on Auto-matching Grinding Technology of Electro-hydraulic Servo Valve

ZHU Xi-wei, CHE Fei, FANG Bing, WANG Dong-zheng

(Hubei Sanjiang Aerospace RedPeak Control Co., Ltd., Xiaogan432000, China)

Abstract: The paper is mainly aimed at solve the problems of eletro-hydraaulic servo valve assembly process: the mateching of the valve core and the valve sleeve is dependent on the workerstechnology and feel, unable to formulate quantitative assessment standards and poor consistency. Based on the methods of existing workmanship process, researchers optimize the process flow, develop the automation equipment, explore the dimensions of the valve core and the valve sleeve, test the performance of eletro-hydraaulic servo valve, prove the possibility of the automatic method which is applied on the matching scheme of the valve core and the valve sleeve.

Key words: the valve core; the valve sleeve; automatic method; matching grinding

变转速电液推进机构

朱军¹，苏小芳¹，张伦伟²，陈建平³，米智楠³

（1.南通泰胜蓝岛海洋工程有限公司，江苏南通226259； 2.同济大学航空航天与力学学院，上海200092；3.同济大学机械与能源工程学院，上海200092）

摘要：电液推进机构用于大型构件的移位装船作业，由夹紧模块夹持钢轨以提供反力支撑，通过推进液压缸完成构件的移位。电液推进机构采用变转速泵控方式，微控制器发出脉宽调制控制信号，作为变频器的输入指令信号，改变定量液压泵驱动电机的转速，以调节定量液压泵的输出流量，进而控制构件的移位速度。工程应用表明变转速电液推进机构具有效率高、响应快等特点，能够满足构件移位的作业需求。

关键词：推进机构；变转速；脉宽调制；电液

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0084-03

Variable-speed Electrohydraulic Propelling Mechanism

ZHU Jun¹， SU Xiao-fang¹， ZHANG Lun-wei²， CHEN Jian-ping³， MI Zhi-nan³

（1. Nantong Taisheng Blue Island Offshore Co., Ltd., Nantong226259, China;2. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai200092, China;3. School of Mechanical Engineering, Tongji University, Shanghai200092, China）

Abstract: Electrohydraulic propelling mechanism can be used in movement of large structures from dock to cargo ship. It consists of propelling cylinder and clamping section. In the condition of clamping steel rail by clamping section, large structure is propelled by propelling cylinder. Clamping section plays the role of providing reacting force. As a type of hydraulic speed-regulating system, variable-speed pump controlled piston system is adopted in electrohydraulic propelling mechanism. Pulsewidth modulation(PWM) from microcontroller is used tochange rotary speed of driving motor of hydraulic pump. By the way, it can fulfill stepless speed-regulating and has good characteristic of power adaptation and energy-saving. The composition of system and working principle are stated. Experiment results show that the system has good controllability and little energy-cost.

Key words:propelling mechanism；variable-speed；pulsewidth modulation; electrohydraulic

6通径闭环比例阀阀体加工工艺研究

徐夏双

(太重集团榆次液压工业有限公司，山西榆次030600)

摘要：闭环比例阀作为高端产品，广泛适用于各工业领域，而其阀体加工尺寸精度的控制已成为其广泛推广应用限制难点之一。该文介绍配备RMP40的加工中心在线测量技术及自定心液压夹具的应用，为阀体的加工提供可靠的尺寸精度保障。同时利用间接测量法解决主阀孔封油槽难测量问题，并为其它加工高精度类阀体工艺提供参考。

关键词：闭环比例阀；在线测量；自定心液压夹具；封油槽；高精度

中图分类号：TH137文献标志码：A文章编号：1008-0813（2020）03-0086-03

Research on Processing Technology of Size 6 Closed-loop Proportional Valve Body

XU Xia-shuang

(Taiyuan Heavy Machinery Group Yuci Hydraulic Industry Co., Ltd.,Yuci030600, China)

Abstract: As a high-end product, closed-loop proportional valve is widely used in various industrial fields, and the control of dimension accuracy of valve body has become one of the difficulties in its wide application. This paper introduces the on-line measurement technology of machining center equipped with RMP40 and the application of self-centering hydraulic fixture, which provides reliable dimensional accuracy guarantee for valve body processing. At the same time, the indirect measurement method is used to solve the difficult measurement problem of the main valve hole sealing tank, and to provide reference for other high-precision reading technology.

Key words: closed-loop proportional valve; on-line measurement; self-centering hydraulic fixture; oil sealing groove; high precision