改进尿素包装工艺 不断提高产品质量

通过对尿素包装工艺的不断改进，提高了尿素粒度、减少粉尘含量，效果明显。     

Design of the Magnetic Field for HT-7U Tokamak

1. Main parameters ofHT-7U deviceThe scientific cession of the HT－7U(HefeiTOkamak-7 Upgrade ), being a next generation advanced tokamak, is to study physical issues on thesteady-state operation of a non-burning plasma. The'. -.engineering mission of the HT-7U tokamak is to establish the technology basis of full superconductingtokamaks for the future reactor. The HT-7U toka-mak will have a long pulse (60 ~ 1000 s ) capability,a flexible PF system, an auxiliary heating and current drive …     

Preliminary Thermal Mechanical Analysis of the Equatorial Thermal Shield for ITER

Thermal analysis of the equatorial thermal shield for ITER is conducted in order to confirm that the cooling tube design was reasonable under both the plasma operational and the baking operational conditions.The structural performance was analyzed by means of the finite element software ANSYS.A comparison of the results with design requirements shows that the results of the simulation are within allowable design requirements,which indicates the feasibility and reliability of the equatorial thermal shield structure.     

带串联间隙四星形接法的MOA

分析了中性点非有效接地系统中氧化锌避雷器存在的问题，提出一种带串联间隙、四星形接法的组合式ＭＯＡ。提高了ＭＯＡ的保护特性。     

无速度传感器矢量控制系统电机参数离线自检测

电动机参数的检测精度是提高无速度传感器矢量控制系统性能的基础。文章根据异步电机的数学模型,采用脉冲法实现了电机基本物理参数的 静态测试,利用Simu-link仿真验证了这种方法的可行性,仿结果表明它能为无速度传感器矢量控制系统提供较高精度的电机参数,具有一定的实际意义。     

Design,Analysis and R＆D of the EAST In-Vessel Components

In-vessel components are important parts of the EAST superconducting tokamak. They include the plasma facing components, passive plates, cryo-pumps, in-vessel coils, etc. The structural design, analysis and related R＆D have been completed. The divertor is designed in an up-down symmetric configuration to accommodate both double null and single null plasma operation. Passive plates are used for plasma movement control. In-vessel coils are used for the active control of plasma vertical movements. Each cryo-pump can provide an approximately 45 m^3/s pumping rate at a pressure of 10^-1 Pa for particle exhaust. Analysis shows that, when a plasma current of 1 MA disrupts in 3 ms, the EM loads caused by the eddy current and the halo current in a vertical displacement event （VDE） will not generate an unacceptable stress on the divertor structure. The bolted divertor thermal structure with an active cooling system can sustain a load of 2 MW/m^2 up to a 60 s operation if the plasma facing surface temperature is limited to 1500 ℃. Thermal testing and structural optimization testing were conducted to demonstrate the analysis results.     

Static and Dynamic Mechanical Analyses for the Vacuum Vessel of EAST Superconducting Tokamak Device

EAST （experimental advanced superconducting tokamak） is an advanced steadystate plasma physics experimental device, which is being constructed as the Chinese National Nuclear Fusion Research Project. During the plasma operation the vacuum vessel as one of the key component will withstand the electromagnetic force due to the plasma disruption, the Halo current and the toroidal field coil quench, the pressure of boride water and the thermal load due to 250℃ baking by pressurized nitrogen gas. In this paper a report of the static and dynamic mechanical analyses of the vacuum vessel is made. Firstly the applied loads on the vacuum vessel were given and the static stress distribution under the gravitational loads, the pressure loads, the electromagnetic loads and thermal loads were investigated. Then a series of primary dynamic, buckling and fatigue life analyses were performed to predict the structure＇s dynamic behavior. A seismic analysis was also conducted.     

ITER极向场电源系统的设计与仿真

ITER极向场电源由两台三相桥式整流器通过平衡电抗器并联输出12脉波,额定电流45kA,额定电压2kV。文章提出电源运行方案为无环流与有环流运行相结合,可以实现四象限运行模式。通过Ansoft Simplorer仿真软件,建立了详细ITER主整流器模型,并设计其电压电流控制器,通过仿真验证了设计方案。     

应用智能称重系统降低累计误差

赤天化股份有限公司尿素包装电子秤已使用多年，计量精确度有所下降，针对存在的问题制定了改造方案。应用电子智能称重系统包装尿素，使称重精确度批累计误差趋于零。