设备闸门提升与导向装置运行特性仿真分析

对核电厂设备闸门提升与导向装置在设备闸门封头开启与关闭过程中的运动特性进行了分析研究，该研究借助动力学仿真软件ADAMS展开，分别对提升与导向装置可能出现的同步提升操作和不同步提升操作两种工况进行了仿真分析。分析结果表明:在同步提升操作工况下，设备闸门封头两侧导向箱位移一致，提升与导向装置不会产生卡滞；在不同步提升操作工况下，设备闸门封头两侧导向箱最大允许高度差为54 mm，否则提升与导向装置将产生卡滞。      

无极绳绞车运输系统及其综合保护装置研究

为了确保煤矿安全运输，研究了无极绳绞车运输系统及其综合保护装置，根据工作面通风系统及巷道布置情况，对无极绳绞车进行了选型，研究了无极绳绞车运输系统的组成和主要功能，主要具有控制功能、保护功能、显示功能、语音提示功能、应急运行功能、存储记忆功能、图形编辑功能、通信及急停功能，然后分析了无极绳绞车运输的综合保护装置。研究为类似工程条件下无极绳绞车运输系统设计提供了技术支持。     

SC15/182F分体式电驱梭车的研制及应用

梭车是短壁机械化开采技术的重要运输设备。简要介绍了现有梭车的现状及应用局限,详细阐述了分体梭车的主要设计思路,重点介绍了薄壁分体式机架的结构特征,阐述了分体梭车在模块化卷电缆装置、四象限变频驱动等方面的技术升级,并介绍了分体梭车在国内矿区的应用情况。     

防冻剂喷洒装置改造方案的研究

通过对现有防冻剂喷洒装置缺点的分析和研究,确定了执行机构和控制系统的改造方案。通过对喷洒装置进行改造,实现了喷洒装置自动化控制。     

数字化射线检测技术在船舶领域的应用

随着数字射线检测技术的不断发展,CR与DR数字射线检测技术以其检测灵敏度高、检测速度快及底片数据电子化存储等优势越来越广泛地应用于各行业中。针对船舶行业射线检测的主要检测对象(钢板对接焊缝、管路对接焊缝),开展了CR数字射线检测技术等价性评价、典型裂纹试验,以及基于不同种类射线装置的DR数字射线检测工艺试验,验证了数字化射线检测技术在船舶领域应用的适用性。     

Study on the failure behavior of the current interrupt device of lithium-ion battery considering the effect of creep

The working condition of the CID (current interrupt device) has an important impact on the safety of the prismatic lithium-ion batteries. One of the important factors that causes the failure of the prismatic power battery is the overturning of CID due to material creep. The tensile and creep tests of the MFX2 aluminum alloy which is the material of CID were designed. Based on the experimental data the isotropic hardening multilinear elastic-plastic constitution and creep constitution at the battery working temperature were established. The constitutions were also verified by the notch test. The finite element model of the CID and the cap was established to analyze the effect of creep on the failure behavior of the CID throughout life. The simulation tests in the constant temperature and constant load of CID is designed. The simulation results showed that the constitution characterizes the basic mechanical properties of the CID reasonably. During the life of the CID, the creep behavior would go through the fast stage firstly and then fall into the slow steady-state stage. The creep effect of the material would cause the CID to overturn in advance, overturning pressure would be reduced, the life of the power battery would also be reduced.     

A review on development of offshore wind energy conversion system

Wind energy conversion system, aiming to convert mechanical energy of air flow into electrical energy has been widely concerned in recent decades. According to the installation sites, the wind energy conversion system can be divided into land-based wind conversion system and offshore wind energy conversion (OWEC) system. Compared to land-based wind energy technology, although OWEC started later, it has attracted more attentions due to its significant advantages in sufficient wind energy, low wind shear, high power output and low land occupancy rate. In this paper, the principle of wind energy conversion and the development status of offshore wind power in the world are briefly introduced at first. And then, the advantages and disadvantages of several offshore wind energy device (OWED), such as horizontal axis OWED, vertical axis OWED and cross axis OWED are compared. Subsequently, several major constraints, such as complex marine environment, deep-sea power transmission and expensive cost of equipment installation faced by offshore wind conversion technology are presented and comprehensively analysed. Finally, based on the summary and analysis of some emerging technologies and the current situation of offshore wind energy utilization, the development trend of offshore wind power is envisioned. In the future, it is expected to witness multi-energy complementary, key component optimization and intelligent control strategy for smooth energy generation of offshore wind power systems.     

一种双边自行车停车装置的设计

针对共享单车停放困难影响交通秩序的现状,迫切需要研发自行车停车装置。设计了一种“摩天轮”式新型双边立式自行车停车装置,由机械执行机构和控制系统两大部分组成。前者通过大转矩步进电机和蜗轮蜗杆减速箱带动圆盘转动形成旋转执行机构,可提供6个自行车车位;后者利用32位闪存微控制器STM32系列单片机来处理停车装置运行过程中产生的数据,实现用户在存取自行车过程中6个车位顺畅地切换以及定位。该装置具有空间利用率高、存取简便快捷、美观防盗等特点,为解决共享单车的停放管理问题提供一种可参考的解决方案。     

Structural and dielectric properties of B2O3/Li2O-added Ba0.6Sr0.4TiO3 multilayer ceramics for tunable devices

B₂O₃ and Li₂O (B/L)-added Ba_0.6Sr_0.4TiO₃ (BST) ceramics sintered at 940 °C exhibited a dense microstructure with large grains. The amount of B/L additive was 4.5 wt% with a B/L ratio of 1.5:1. The B/L-related liquid phase assisted the densification of the BST ceramics. This BST ceramic displayed a large dielectric constant (ε_r) of 2834 with a low dielectric loss (tan δ) of 0.21% at 1.0 MHz. It also displayed a large tunability (28.2% at 10 kV/cm) and a high figure of merit (FOM) of 134. BST thick-films were synthesized using the tape casting method. The thick-film densified at 940 °C exhibited a large tunability of 18.7% at 10.0 kV/cm and an FOM of 208; these are higher than the values reported in the literature. Multilayer ceramics (MLCs) consisting of five layers of 40-μm-thick BST thick-films and Ag electrodes were also fabricated at 940 °C. No diffusion occurred between the Ag electrode and BST thick-film. A large tunability of 67.6% at 52 kV/cm with a high FOM of 294 was obtained from this MLC. This verified that the B/L-added BST ceramic is effective for application in tunable multilayer devices.     

轮式自动管缆伸缩装置关键技术研究

为了解决煤矿井下设备列车采用单轨吊悬挂的方式储存电缆、液管,存在高空悬挂作业、人工或绞车牵引等安全隐患,研制轮式自动管缆伸缩装置,对综采工作面动力控制设备提供安全保障。介绍了轮式自动管缆伸缩装置的工作原理以及整体结构形式,分析了伸缩装置采用的分组遥控电液控制系统、环形供液以及多传感器反馈闭环控制方式,实现了设备同步快速平稳安全运行。结果表明:该管缆伸缩装置能够适应巷道高度2.5 m以上的工况条件,取消绞车牵引、高空悬挂单轨吊以及铺设轨道,简化了劳动组织工序,有效保证工作面安全高效生产。