封闭电功率流型机械传动试验台的设计与分析

通过对封闭直流电功率流型机械传动试验台加载原理的分析,提出了节能系数的概念,得出了加载系统的参数选择原则。     

机械封闭功率流齿轮试验台测试齿轮传动效率的方法

本文提出一种用机械封闭功率流齿轮试验台测试齿轮传动效率的方法，并推导出根据试验结果正确计算效率的方法。     

电封闭技术在行星减速器试验台研制中的应用

行星减速器是工程机械的重要部件,其性能好坏对工程机械有重大影响。实验台能够在行星减速器装机之前检测减速器的性能,避免行星减速器在装机之后出现问题,影响主机的质量。实验台采用电封闭技术,将负载转化产生的电量通过直流母线直接回馈电网,保证了系统的效率。实验台控制系统硬件主要由工控机、西门子S7-300PLC和西门子S120多轴驱动系统构成,实验的数据,如不同工况下的转速、转矩、传动效率和疲劳寿命,通过软件可以以图表等直观方式实时显示。同时还可实现历史实验数据的查询与打印、动作异常报警、自动检测、完成实验自动关机等功能。最终可自动生成WORD版图文并茂的实验报告。     

新型封闭功率流齿轮试验台的结构设计及其效率的计算

针对现有齿轮试验台齿轮试验中心距不可调的不足,提出了一种可变中心距的新型机械封闭功率流齿轮试验台的结构方案,对其功率流的方向进行了判断,并对齿轮箱的效率进行了一定的计算,为其在实际的齿轮效率试验中的应用提供了一定的理论依据.     

数控多功能封闭式机械传动试验台

对数控多功能封闭式机械传动试验台的各个组成部分进行了概述,着重指出了各部分在系统中功能,以及常用的配置.     

微机控制电封闭汽车变速箱试验台

本文介绍由驱动侧电机、加载侧电机及控制等组成的电封闭试验台 ,计算机通过串行通讯从扭矩仪取得扭矩和转速等测量值 ,进而通过 D/ A实施控制 ,系统采用了预测和模糊相结合的智能控制方法。实施结果良好。     

开放电功率流型机械传动试验台加载特性分析

本文研究了开放电功率流型机械传动试验台的加载方式，并对其加载特性进行了分析，在此基础上，讨论了该类试验台参数的确定方法。     

两类减速器试验台性能比较

介绍了两类减速器试验台的结构,并对每一类试验台的优缺点进行了分析。     

封闭功率的图示分析

本文分析行星封闭传动中各构件的功率传递关系,得出封闭功率的存在、流向、大小与封闭传动型式(通过输入轴封闭或通过输出轴封闭)和行星机构联接特性系数A有关。在速比平面图上,通过输入轴封闭的Ⅰ型传送的无封闭功率区域是1/1+A～∞,通过输出轴封闭的Ⅱ型传动的无封闭功率区域是0～1/1+A。     

机械封闭系统的研究

简介了机械封闭系统,并通过实际测量数据,分析了封闭系统省功率的原理。     

张力控制试验平台及监测系统的研究

论述了张力控制试验平台及监测系统的硬件配置及软件组成。详细说明了该系统过程数据的测量、多档张力的控制、数据的监测与采集等问题，并给出了基于此平台完成的单神经元自适应PID控制策略及其优化实验。     

能量回收绞车试验台液压系统研究

渔轮用液压绞车的卷筒钢丝绳长2000m,生产出来之后需要进行长时间的寿命试验.常规的试验方法通过节流为测试绞车加载,发热多,能耗大.以能量回收方法将绞车试验台的传统节流式系统改造设计成新的液压系统,实现能量的回收再利用,减少节流发热,提高整个系统能量的利用率.     

Experimental evaluation of mechanical and electrical power consumption of feed drive systems driven by a ball-screw

An experimental analysis of the mechanical and electrical power consumption of feed drive systems is presented in this paper. The main components affecting the power consumption are the motor, bearings, ball-screw, and table. The power consumption of the motor has been investigated experimentally through the study of the electrical efficiency. The efficiency has been calculated from the acquired angular velocity and supplied torque for several velocities and loads. The study shows how the working conditions of the motor heavily influence the efficiency of the motor and therefore the power consumption of the whole feed drive system. Moreover, the mechanical power consumption of each component of the feed drive has been investigated, showing that the main component responsible for the consumption is the ball-screw. Thus, in order to clarify the influence of the constructive parameters of the ball-screw on the power consumption, four kinds of ball-screws differing in the lead dimension and the preload condition have been considered. Furthermore, it clarifies the relation between the power consumption of the feed drive system and the working velocity of the table. Finally, the advantages and disadvantages of each feed drive mechanical configuration are discussed, emphasizing that the driven factor that affects the power consumption the most is the angular velocity, due to the trade-off between the motor efficiency and the mechanical power loss from the friction of the components in relative motion. This research can help the selection of the lead of the ball-screw, from an energetic point of view, in order to get higher efficiency of the feed drive.     

紧固件横向振动试验台的研制

详细介绍了紧固件横向振动试验台的原理、组成及各部分主要结构。该试验台具有试验周期短、可试验项目多、结构简单和成本低等优点。实践证明,该试验台能有效测试螺纹联接的防松性能。     

Development of a drilling and coring test-bed for lunar subsurface exploration and preliminary experiments

Drill sampling has been widely employed as an effective way to acquire deep samples in extraterrestrial exploration. A novel sampling method, namely, flexible-tube coring, was adopted for the Chang＇e mission to acquire drilling cores without damaging stratification information. Since the extraterrestrial environment is uncertain and different from the terrestrial environment, automated drill sampling missions are at risk of failure. The principles of drilling and coring for the lunar subsurface should be fully tested and verified on earth before launch. This paper proposes a test-bed for conducting the aforementioned experiments on earth. The test-bed comprises a rotary-percussive drilling mechanism, penetrating mechanism, drilling medium container, and signal acquisition and control system. For granular soil, coring experiments indicate that the sampling method has a high coring rate greater than 80%. For hard rock, drilling experiments indicate that the percussive frequency greatly affects the drilling efficiency. A multi-layered simulant composed of granular soil and hard rock is built to test the adaptability of drilling and coring. To tackle complex drilling media, an intelligent drilling strategy based on online recognition is proposed to improve the adaptability of the sampling drill. The primary features of this research are the proposal of a scheme for drilling and coring a test-bed for validation on earth and the execution of drilling experiments in complex media.     

封闭周转轮系内部的功率流和传动效率的分析

通过分析周转轮系转化机构中的传动比,以及中心轮a和内齿圈b的转速和的符号关系,能准确的分析轮系的功率流向和循环功率;利用传动比法分析闭式差动周转轮系的效率计算问题,能准确地计算出啮合效率.并通过分析啮合功率流向和循环功率流,得出合理的选择传动型式、齿数、结构组成以及输入构件或输出构件,能有效的避免封闭功率,提高传动效率.     

一种实用的功率MOS管电机驱动电路

在分析了MOS管导通原理的基础上,结合功率放大电路的原理,提出了一种电机MOS管的驱动电路,该电路适合高频信号开关控制电路。利用Multisim仿真软件仿真分析,并经过实际的运用,该电路达到了良好的效果。     

基于LabVIEW的滑油泵试验台测控系统设计与实现

针对滑油泵出厂前需要进行多项试验测试这一情况,以CompactRIO为测控核心,利用LabVIEW编程环境,设计开发了一套滑油泵试验台多功能、集成化、模块化的测控系统。首先,介绍了系统总体结构和上/下位机的以太网通讯;其次,给出系统各项硬件设备列表和配置;然后,采用LabVIEW设计开发上位机测控系统程序,并结合应用TDM存储方式和数据库管理系统对试验数据进行管理。最后通过投运结果,说明了该系统具有实用性和有效性。     

青藏发电车电源检测系统的设计与应用

针对青藏发电车实际运用中检修后需要检测负载等参数的需求,介绍了青藏发电车电源检测系统的系统结构、工作原理、硬件设计、软件设计以及测试项目。该检测系统是根据青藏发电车地面检测的生产需要而开发研制的,实现了对青藏发电车运行状态的地面实时在线测试监控,经实践证明该系统工作可靠稳定,为青藏旅客列车安全运行提供必要的安全保证。