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缠绕成型是连续纤维增强热固性树脂复合材料容器最常用的一种成型方法,而温度则是热固性树脂基复合材料缠绕固化成型的重要影响因素之一。在大型复合材料容器旋转固化成型过程中密闭固化炉或烘箱内的温度很高,无法利用现有的温度测量装备对其实施在线测量,进而为固化制度优化提供理论依据。该文提出一种应用于复合材料容器旋转固化状态下的无线测温装置,首先介绍其组成结构和工作原理,然后对其工作性能进行试验验证和调试,从而为优化热固性树脂基复合材料的固化工艺制度以及提高能源利用率提供一种理论工具。 相似文献
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雷明华 《合成材料老化与应用》2019,48(3)
滚塑设备在化工行业应用越来越多。首先从滚塑设备选用的主要物料入手,简要介绍滚塑设备的制备过程。制备过程分为准备、加料、加热、冷却、脱模等几个步骤。其中滚塑模具是滚塑成型技术中的关键部件。介绍了滚塑设备的加热方式和常见的腐蚀方式。着重介绍了滚塑成型故障的原因分析及相应措施。可以为工程设计提供参考和依据。 相似文献
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加热时间对滚塑制品性能的影响 总被引:1,自引:0,他引:1
《塑料科技》2017,(2):55-58
使用滚塑级线型低密度聚乙烯(LLDPE)粉末,研究了加热时间对滚塑制品性能的影响。结果表明:在滚塑成型工艺中,存在最佳加工温度区间,且该区间位于凝结段;对于滚塑制品的断裂伸长应变和弯曲模量,在消泡段存在"加热陷阱",应尽量避免在这一温度区间进行加工。 相似文献
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介绍一种采用MCS-51单片机为智能部件的温,湿度微机检测系统,包括系统的工作原理,硬件结构组成和软件的设计思想。 相似文献
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In this work, a kind of thin K‐type thermocouple and self‐developed CAS‐I sealant were used to assembly solid oxide fuel cell (SOFC) stacks and temperatures of unit cells inside a planar SOFC stack were measured. The open circuit voltage testing of the stack and characterization of the interface between sealant and components suggested excellent sealing effect by applying the developed method. The effect of discharging direct‐current on temperature and temperature distribution inside the designed SOFC stack was investigated. The results showed that the discharging current had a great impact and the gas flow rate had a slight impact on the temperatures of unit cells. Temperature distribution of unit cells inside the stack was much non‐uniform and there is a significant temperature difference between various components of the stack and heating environment. The relationship between temperatures and cell performance showed that the worse the cell performance, the higher the cell surface temperature. When the stack was discharged at a constant current and the temperature of cell surface was over 950 °C, the higher the temperature, the more drop the corresponding voltage. 相似文献
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在油井开发过程中,井下压力和温度数据是进行方案实施的重要依据。就实现井下压力和温度的测量,满足大容量数据快速存储的要求,设计了基于PIC16F877A单片机为核心的井下压力温度测量系统。 相似文献
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This study examines the development of micro in situ sensors and analyzed the through‐plane temperature of a fuel cell. Temperature sensing inside a fuel cell is important in fuel cell diagnosis and analysis. Temperature sensors must be adequately small, so that fuel cell performance is maintained and the temperature anywhere inside the cell can be flexibly measured. In this study, a temperature sensor based on a micro‐electromechanical system (MEMS) is designed and fabricated to achieve these objectives. The micro temperature sensor was installed inside a cell to measure through‐plane temperature. The current and voltage of the fuel cell with the micro temperature sensor were measured and compared with those of a fuel cell without the sensor to analyze the effect of the sensor on fuel cell performance. The developed temperature sensor is of resistance temperature detector (RTD) type, with a flexible substrate of polyimide, high sensitivity, and easy installation characteristics. After calibration of the sensors, three sensors were inserted into the cell to measure the through‐plane temperature, and the polarization curve of the cell with and without the micro sensor was compared. Finally, a 3D computational fluid dynamics (CFD) model of a fuel cell was developed and analyzed by comparison of the measured temperature results to determine the accuracy of the model. 相似文献
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Unsteady temperature fields of monoliths in catalytic converters 总被引:2,自引:0,他引:2
Shi-Jin Shuai Jian-Xin Wang 《Chemical engineering journal (Lausanne, Switzerland : 1996)》2004,100(1-3):95-107
This paper measured unsteady temperature fields of uncoated-monolith and catalytic monolith under real engine operating conditions using thermocouples. A multi-dimensional flow model of the turbulence, heat and mass transfer, and chemical reactions in monoliths was established and numerically solved in the whole flow field of the catalytic converter. The purpose of this paper is to study unsteady warm-up characteristics of the monoliths and to investigate effects of inlet cone structure on temperature distribution of the catalytic converter. Experimental results show that the warm-up behaviors between uncoated-monolith and catalytic monolith are quite different. Simulation results indicate that the established model can qualitatively predict the warm-up characteristics. Increasing the inlet cone angle can improve the light-off characteristics of the catalysts due to high flow velocity and high temperature in the center of the monoliths. 相似文献
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针对热回收焦炉的炼焦过程和加热的特点,为稳定焦炉生产,除合理控制配煤挥发分外,需加强炉温压力的检测与调节。 相似文献
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分布式光纤测温技术利用光纤后向喇曼散射光谱的温度效应和光时域反射技术实现温度测量,它是一种利用既是传输介质,又是传感介质的光纤进行实时测量空间温度场分布的传感系统。文章介绍了分布式光纤测温系统进行井温测量的工作原理、系统构成及在稠油注蒸汽井中进行测量的测试工艺和现场应用。该系统具有良好的测量精度和分辨率,可以在不影响温度场原始分布的情况下实现实时快速的测量。 相似文献
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介绍了高温熔体压力传感器的结构及原理,用一组实验数据说明了温度对传感器测量精度的影响,介绍了一套实用的传送放大接口电路,分析了在聚合物挤出测压过程中可能的测量误差来源,并提出了相应的对策。 相似文献