高速率大容量传输设备可靠性的机械设计方法

从设备的电磁兼容与热设计方面具体阐述了提高高速率大容量通信传输设备可靠性的方法。经过测试和实践证明该方法能够有效地防止恶劣环境条件对设备的干扰,提高设备的可靠性,保证设备正常工作。对于高速率大容量通信传输设备的可靠性设计具有普遍意义。     

冲压件在线检测设备测量主机结构设计

在分析冲压件在线检测的特点、检测原理以及检测设备功能要求的基础上,对设备的总体方案和测量主机结构进行了设计和探索,得出了测量主机结构方案,并建立了测量主机虚拟样机。     

盘香喷药机的研制

针对目前蚊香行业生产工艺现状,设计研制一喷药设备。本文阐述了该机工作原理,指出该机在设计、制作、选材等方面的优点,主要采用优质不锈钢,在制作中大量采用折边,并与原工艺进行分析比较,对驱蚊效果进行分析讨论。指出新设备在提高驱蚊效果、减小厂家资金周转压力、提高成品合格率、降低生产成本、提高生产率等方面大大优于原工艺。     

Turbulent flow and heat transfer characteristics of a two-dimensional oblique plate impinging jet

Turbulent flow and heat transfer characteristics of a two-dimensional oblique plate impinging jet (OPIJ) were experimentally investigated. The local heat transfer coefficients were measured using thermochromic liquid crystals. The jet mean velocity and turbulent intensity profiles were also measured along the plate. The jet Reynolds number (Re, based on the nozzle width) ranged from 10, 000 to 35,000, the nozzle-to-plate distance (H/B) from 2 to 16, and the oblique angle (α) from 60 to 90 degree. It has been found that the stagnation point shifted toward the minor flow region as the oblique angle decreased and the position of the stagnation point nearly coincided with that of the maximum turbulent intensity. It has also been observed that the local Nusselt numbers in the minor flow region were larger than those in the major flow region for the same distance along the plate mainly due to the higher levels in turbulent intensity caused by more active mixing of the jet flow.     

The effect of ambient air condition on heat transfer of hot steel plate cooled by an impinging water jet

It has been observed that the cooling capacity of an impinging water jet is affected by the seasonal conditions in large-scale steel manufacturing processes. To confirm this phenomenon, cooling experiments utilizing a hot steel plate cooled by a laminar jet were conducted for two initial ambient air temperatures (10°C and 40°C) in a closed chamber, performing an inverse heat conduction method for quantitative comparison. This study reveals that the cooling capacity at an air temperature of 10°C is lower than the heat extracted at 40°C. The amount of total extracted heat at 10°C is 15% less than at 40°C. These results indicate the quantity of water vapor, absorbed until saturation, affects the mechanism of boiling heat transfer.     

Isothermal characteristics of a rectangular parallelepiped sodium heat pipe

The isothermal characteristics of a rectangular parallelepiped sodium heat pipe were investigated for high-temperature applications. The heat pipes was made of stainless steel of which the dimension was 140 m(L) ×95m(W) ×46m(H) and the thickness of the container was 5 mm. Both inner surfaces of evaporator and condenser were covered with screen meshes to help spread the liquid state working fluid. To provide additional path for the working fluid, a lattice structure covered with screen mesh wick was inserted in the heat pipe. The bottom surface of the heat pipe was heated by an electric heater and the top surface was cooled by circulating coolant. The concern in this study was to enhance the temperature uniformity at the bottom surface of the heat pipe while an uneven heat source up to 900 W was in contact. The temperature distribution over the bottom surface was monitored at more than twenty six locations. It was found that the operating performance of the sodium heat pipe was critically affected by the inner wall temperature of the condenser region where the working fluid may be changed to a solid phase unless the temperature was higher than its melting point. The maximum temperature difference across the bottom surface was observed to be 114^°C for 850 W thermal load and 100^°C coolant inlet temperature. The effects of fill charge ratio, coolant inlet temperature and operating temperature on thermal performance of heat pipe were analyzed and discussed.     

对高炉本体冷却系统的技术分析及探讨

高炉本体冷却系统能否正常工作,是决定一代高炉寿命的关键因素.从高炉冷却方式的选择、冷却设备的设计安装、检漏技术的发展应用、高炉生产的操作维护等方面,详细论述了目前高炉应采用的冷却新技术.为延长高炉寿命提供了必要的依据.     

面向半导体设备的Interface A通信方法研究

针对半导体设备工厂自动化的设备数据采集需求,给出了一种基于Interface A标准的通信方法,该方法构造了设备的通用模型,设计了设备通信的安全认证和授权机制,并给出了采集设备实时数据的方法,可满足工厂自动化系统对半导体设备的数据采集和设备控制需求。     

Numerical analysis of a moving gas tungsten arc weld pool with an external longitudinal magnetic field applied

Mathematical models of the electromagnetic field, fluid flow and heat transfer of a three-dimensional moving gas tungsten arc (GTA) weld pool with external longitudinal magnetic field applied are established in the paper. Using a multi-coupled analysis function of ANSYS finite element code, distributions of current density and magnetic field, as well as fluid flow and heat transfer in a moving weld pool, were systematically studied and investigated to understand and reveal the effect of an external longitudinal magnetic field on liquid metal in a moving GTA weld pool and also to supply a basis for the application of an external longitudinal magnetic field in welding technology .     

舞台起吊设备新型排绳机构的设计与结构优化

对舞台起吊设备中通常采用的几种排绳结构的排绳原理进行了详细分析，在分析研究的基础上试验并改进设计了新型排绳机构：该机构采用双向绝对约束排绳原理，排绳安全可靠、效率高，也是同类卷扬吊挂机械最为理想的排绳结构之一，具有推广价值。推导出机构的功耗及效率关系式亦可供同类设备设计及研究中参考应用；     

中型足球机器人踢球机构设计

针对RoboCup中型组足球机器人踢球机构的各种设计方案进行了分析。在不违反RoboCup中型组机器人比赛规则的前提下,充分利用了机器人前方仅有的空间,采用了压缩弹簧的翻板踢球机构,结构简单紧凑,符合实际需要。最后,运用三维设计软件对踢球机构进行了建模与仿真分析。整个机构运动很协调,说明机构设计十分合理,完全能达到预期目的。     

一种电源试验装备的设计

为了解决电源质量监督与检验验收中工作效率低、质量隐患难发现、历史数据难利用等问题,该文设计了基于LabVIEW软件和嵌入式技术的实验装备检验系统。利用传感器采集检验项目中的电压、电流、纹波、噪声、加速度和输入电压,经过ARM处理后经通信电路发送给LabVIEW上位机软件,并依据技术指标给出检验结果。实验结果表明,该系统具有测试效率高,数据获取存储方便,故障诊断准确等优点。     

填料塔控制系统实验装置的实现

填料塔实验装置抽象于工业生产中常见的塔类热交换装置,在该实验装置上可以进行各种不同的控制系统研究与实验。该文介绍了实验装置建立的意义,计算机控制系统的硬件软件组成,实现的功能等。重点介绍了解耦控制在填料塔温度控制中的应用,控制结果表明该装置完全达到了设计要求。     

天然气造气二段炉出口废热锅炉液位控制

“以汽定水 液位前馈”比值控制方案在二段炉出口废热锅炉液位控制上取得了满意的效果。     

基于PLC的内燃机专用清洗设备控制系统

为了实现内燃机专用清洗设备的实时监测与控制,采用了三菱FX2N可编程控制器及其A/D模块作为控制器件,完成了该设备控制系统的硬件和软件设计,实现了对设备作业的自动控制和清洗液温度的控制.实际应用结果表明,该控制系统能准确控制清洗液温度,并提高了作业的质量和效率.     

基于蒙皮换热器的无人机电子设备冷却方案分析

针对无人机应用中日益突出的电子设备发热问题,提出了一种基于蒙皮换热器的无人机电子设备冷却方案。根据设计需求确定了各主要部件的温度要求及换热器效率要求,并对系统进行了试验验证。文中提出的电子设备冷却方案属液体冷却方式,电子设备的发热量可以通过蒙皮换热器传递给舱外冲压空气热沉。通过合理的等效换热测量方法设计的地面性能试验考查了系统运行时各部分温度、换热器的换热量及系统能效比。试验结果表明,该方案有效可行,能够满足较大发热功率的无人机电子设备的冷却需求,具有广泛的应用价值。     

滚丝机床的一种定心装置设计

介绍滚丝机床的一种定心装置设计,并给出该装置的结构及设计参数。     

钢索式液压提升装置的设计及应用

介绍了一种新型、特种吊装设备的原理、结构及特点。该设备适用于大型物体的整体提升和运输，并给出了一些工程实施方案和应用实例。同时结合该设备的特点以及在各行业内的应用前景，探讨了今后的发展方向和具体的提高改进方案。     

一种用于快速成形设备的“跳跃”式铺粉装置

快速成形技术是一种多学科交叉的系统工程技术,在以粉末作为成形原料的快速成形技术中,铺粉装置是其成形设备中的关键部件之一。现有的铺粉装置存在粉末约束难、易堆积,粉末利用率低,结构复杂且难以调整等缺点,借鉴原有的铺粉装置,利用轨道变化使刮片在工作行程中实现＂跳跃＂动作并增加可调侧翼形成新的＂跳跃＂式铺粉装置,通过实验验证可以有效的改善上述问题。     

卧式挤压铸造设备双曲肘合模机构仿真优化设计

通过分析2500kN卧式挤压铸造设备双曲肘合模机构的工作原理,结合虚拟样机仿真软件ADAMS进行建模及仿真优化设计。以合模机构工作过程中各杆件连接点为设计变量、合模动作完成时最大合模力为目标函数进行优化设计。优化结果表明,该方法有效地提高了机构的整体性能。