提升机交流电控系统故障诊断专家系统设计

对交流提升机电控系统进行了故障分析，阐述了建立ＴＫＤ—Ａ电控系统故障诊断专家系统的方法，并给出了其知识库、推理机等组成部分的设计过程。     

矿井提升机TKD─A型电控故障显示寻查装置

矿井提升机ＴＫＤ─Ａ型电控故障显示寻查装置枣庄市级索煤矿黄明举，杨列进关键词电控系统，故障显示寻查装置，矿井提升机１前言目前，矿井提升机ＴＫＤ－Ａ型电控系统应用较广，使用中不可避免地会发生故障。根据使用情况总结出常发生故障的部位多为各种电气元件的触点...     

PLC全数字变频器在主井提升电控系统中的应用

介绍了白银公司小铁山矿主提升机电控系统由ＴＫＤ－Ａ传统的继电器控制系统改造为ＴＫＤ－ＰＣ控制系统的具体情况，阐述了该系统中ＰＬＣ、ＶＳ－６１６Ｇ５全数字变频器的工作原理，剖析了ＰＬＣ及全数字变频器运用于提升电控系统中的独特之处。     

用PC对提升机电控系统进行改进的研究

在对ＴＫＤ系统分析的基础上，阐述了用ＰＣ替代继电器控制的方法，为煤矿提升机电控系统的技术改造提供了新的思路。     

枣庄局柴里矿主井提升机电控改造简介

柴里矿主井提升机是１９８２年８月安装调试后投入运行的落地单绳缠绕式交流提升机,型号为ＺＪＫ—４／２０,配套湘谭电机厂生产的ＴＫＤ—２２８９电气控制系统,电气制动方式为动力制动。主要担负着柴里矿的全部原煤提升任务,最大提升能力５５０ｔ／ｈ。１ＴＫＤ电控...     

可编程控制器在提升机电控中的应用及前景

分析了交流提升设备ＴＫＤ系统,交流提升机可编程电控系统ＰＣＴＳ－Ⅲ型的弱点和缺陷;ＰＣＴＳ－Ⅲ型的系统方案性能和经济效益,以及可编程控制器的应用前景。     

ON THE DRIVING BEHAVIOR，VARIABLE－DIAMETEREFFECT AND BEAKING CAPACITY OF DRIVENCAST－IN－SITU PILE WITHFLAT

ＯＮＴＨＥＤＲＩＶＩＮＧＢＥＨＡＶＩＯＲ，ＶＡＲＩＡＢＬＥ－ＤＩＡＭＥＴＥＲＥＦＦＥＣＴＡＮＤＢＥＡＫＩＮＧＣＡＰＡＣＩＴＹＯＦＤＫＩＶＥＮＣＡＳＴ－ＩＮ－ＳＩＴＵＰＩＬＥＷＩＴＨＦＬＡＴＯＶＥＲＳＩＺＥＴＩＰＳｈｉＰｅｉｄｏｎｇ，ＦｕＺｈｅｎｑｉｕ...     

用PLC对提升机电气控制系统的改造

用可编程序逻辑控制器对ＪＫ型提升机配套使用的ＴＫＤ－Ａ型电气控制系统进行了改造。改造后的电器控制系统可靠性高，线路简单，维护方便。     

CLФ500 vubrating and pulsating high dradient mag-netic separator and its appl

ＣＬΦ５００ＶＩＢＲＡＴＩＮＧＡＮＤＰＵＬＳＡＴＩＮＧＨＩＧＨＧＫＡＤＩＥＮＴＭＡＧＮＥＴＩＣＳＥＰＡＲＡＴＯＲＡＮＤＩＴＳＡＰＰＬＩＣＡＴＯＰＮＳＦｅｎｇＤｉｎｇｗｕ，ＰｅｎｇＳｈｉｙｉｎｇ，ＳｕｎＺｈｏｎｇｙｕａｎ，ＣｈｅｎＪｉｎＤｅｐｔ．ｏｆＭ...     

提升机后备保护探讨

对提升机ＴＫＤ－Ａ控制系统的主保护系统进行了详细论述，分析了系统保护的薄弱环节，提出了完善和补充保护系统的两种方案。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。