某套筒的精度检验及修复方法

分析了套筒总成的结构,明确了影响其跳动的因素,指出了确定其误差的办法,并讲明了导致其产生误差的因素,给出了解决办法。     

新型双向比例电磁铁的仿真研究

针对传统的比例电磁铁体积大,难拆卸等缺点,介绍了一种新型双向比例电磁铁,详细阐述了其结构及工作原理,在此基础上,建立了比例电磁铁的数学模型,采用Ansoft/Maxwell有限元工具分析了其输出特性,通过电磁场分析,深入讨论了其结构参数对其输出特性的影响。     

基于ANSYS14.0砂轮架的动态分析与优化设计

砂轮架作为磨齿机的磨削部分,其动态性能对磨齿机的磨削精度起到关键性作用。利用ANSYS14.0软件对内磨齿机砂轮架进行建模,然后对其进行动态分析,并找出其设计的不足,最后对其进行了优化设计,保证了其磨削精度的同时还减轻了质量,节约成本,计算与分析结果为砂轮架的进一步分析提供了理论依据。     

某型卧式加工中心自动换刀系统可靠性与故障分析

首先介绍了某型卧式加工中心自动换刀系统的结构特点和换刀过程,然后对其可靠性试验数据进行了分析,并以此为基础建立了换刀系统的可靠性模型,分析了其可靠性特性,结果表明其可靠性薄弱环节为机械手装置和刀库装置。此外还从机械手故障、刀库故障、液压故障和电气控制故障4个方面对其常见故障进行了详细分析,为其可靠性改进和故障维修指明了方向。     

等厚分层出料螺杆的设计和三维有限元分析

以螺旋输送机理论为基础,设计了一种等厚分层连续出料螺杆,介绍了其设计方法,通过理论分析推导出其参数变化规律;并借助大型有限元分析软件ANSYS进行线性静力学分析,验证了其结构强度的安全性,并根据其位移响应修正了其间隙设计参数,为后续的改进和优化提供了参考和借鉴。     

WirelessHART网络技术及其应用研究

介绍了WirelessHART网络及其研究现状,分析了其技术难点,最后探讨了其应用领域与未来发展前景。     

飞机蒙皮检测爬壁机器人结构设计与运动分析

针对传统的飞机蒙皮检测技术效率低、工作周期长、识别率差等问题,提出了一种能够自主完成飞机蒙皮检测工作的螺旋桨推力吸附式爬壁机器人.首先,以爬壁机器人应用背景为基础,进行了机器人的机械结构设计,以履带传动作为其移动机构,设计了相应的履带变形机构,提升其自适应越障性能,并利用螺旋桨提供其反向运行吸附力;其次,分析了其爬坡运动稳定性;最后,建立了机器人的运动学模型,分析了其越障能力,论证了其应用于飞机蒙皮检测的可行性.     

航空有机玻璃拉伸机拉伸力数字PID控制系统开发

以航空有机玻璃拉伸机为母体,基于VB和PLC开发了航空有机玻璃拉伸机拉伸力数字PID控制系统,介绍了其硬件结构,建立了其数学模型和开发了其数字PID控制系统,并深入研究了数字PID控制的改进算法.     

潜孔锤关键零件的断裂分析

基于某潜孔锤关键零件常出现的断裂现象,从其断口特征、受载工况等方面进行了分析,得出其断裂的主要原因是疲劳破坏,分析了疲劳断裂过程。依据疲劳破坏的理论,对其材料热处理、几何结构以及表面精度等进行了调整,延长了其使用寿命。     

BH-KHJ卡簧机的改进设计及应用

本文针对BH-KHJ卡簧机装配过程中划伤活塞销孔问题,分析了其失效原因,介绍了其改进设计方案,并对其进行了验证应用,具有一定的参考价值。     

弹性阀瓣式截止阀

介绍了弹性阀瓣式截止阀的启闭密封副结构特点和动作原理。该阀门结构和性能优于普通结构截止阀，已经获得国家专利（专利号：ZL2005200890584）。     

A study on the force balance of an unbalanced globe valve

A pneumatic control valve is a piping element that controls the volumetric flow rate and pressure of a fluid; it is necessary to analyze the characteristics of the forces with respect to the opening of the valve in order to evaluate its operating performance. The forces occurring during operation are: resisting force and actuator force, where the load resistance is mostly affected by the fluid pressure difference of the valve. In this study, a force balance equation derived from the equilibrium relationship between the resisting force and the actuator force of an unbalanced globe valve is proposed, and the force balance equations are used to model the dynamic equations of a pneumatic unbalanced globe valve installed in nuclear power plants. A CFD analysis is also carried out to evaluate the pressure distribution and forces acting on the top and bottom planes of the valve plug. The results of this analysis have been verified through experimentation. This study has shown that the fluid pressure difference between the inlet and outlet of the valve, measured from the force balance equation of an unbalanced valve, should actually be examined with the fluid-pressure difference between the top and bottom side of the valve plug.     

先导式高压清水截止阀的设计

为了克服浆体输送设备用普通清水截止阀水击压力和噪声大等缺点，研制了一种先导式高压清水截止阀，介绍了其结构、工作原理和有关参数。     

Cavitation reduction in the globe valve using oblique perforated cages: A numerical investigation

Globe valves are one of the oldest and most widely used flow control valves. However, cavitation due to high-pressure drop is a common phenomenon in such valves, reducing valve lifetime and increasing replacement costs. Recently, a series of perforated cages have been used in globe valves to reduce cavitation damage (especially in the body and disk). In this study, a globe valve is numerically investigated under four different structures, i.e., without the cage, with a perforated cage whose holes are radial, with a perforated cage whose holes are facing upwards, and with a perforated cage whose holes are facing downwards. The effects of the valve opening, inlet velocity, and holes direction on the pressure drop and cavitation incipient/intensity are investigated. The results show that cavitation is observed with the decrease of the valve opening even at the low velocities. And with increasing the velocity inlet, the pressure drop and cavitation intensity increase significantly. It can also be concluded that in the globe valve using a perforated cage with holes downwards, less cavitation is observed than in other models. Therefore, this configuration is proposed to protect the inner components of the valve (such as seat, seal, and plug) from cavitation damage.     

内旁通截止阀结构的改进

对普通旁通截止阀结构进行了分析，介绍了改进后的新结构内旁通截止阀的特点。     

过滤式Y形截止阀

介绍了过滤式Y形截止阀的工作原理和结构特点,论述了其优良的性能。     

阀体可分开式Y形截止阀设计

阐述了一种便于拆卸更换密封件的阀体可分开式Y形截止阀的结构特点。介绍了该阀主要零件使用的材料，探讨了该阀存在的问题。     

液动截止阀的结构设计与加工

介绍了新型液动二位三通截止阀的工作原理及加工方法。     

T形钠截止阀阀体的加工

介绍了T形钠截止阀阀体的结构、特点及机械加工方法。     

核级波纹管密封钠截止阀的研制

介绍了核级波纹管密封钠截止阀的性能参数、结构及其主要零件的材料。分析了钠阀冷态循环、流阻、寿命试验及地震、热态试验的试验过程及其技术要求。阐述了钠阀门技术设计要点及其实践经验。