多绳提升机钢丝绳张力动态测试调整研究

为解决矿井多绳摩擦式提升机钢丝绳张力不平衡问题，利用压轮推进机构间接测量多绳提升机钢丝绳张力的原理，确定了多绳摩擦提升机钢丝绳张力动态测试装置及钢丝绳张力差调整方法。     

多绳摩擦提升机钢丝绳张力平衡装置现状和发展趋势

多绳摩擦式提升机由于体积小，重量轻，提升能。力大，安全性能好及适合于深井等，成为我国各大矿山的主要提升设备。但多绳提升机在使用过程中存在各绳之间的张力平衡问题。若各绳之间的张力不平衡，就会造成钢丝绳疲劳损坏和摩擦衬垫的早期报废，甚至会造成滑绳、断绳等重大生产事故。由此可见，保持绳间的张力一致，对延长钢丝绳寿命，减轻衬垫磨损、保证设备安全运行有着很重要的意义。     

一种矿山提升机箕斗三角板偏斜的检测装置

正多绳摩擦式提升机是矿山的主要运输设备,使用以来,钢丝绳张力不平衡是安全提升的难题。在提升设备中,张力自平衡主绳悬挂装置起着调节钢丝绳张力平衡、保持箕斗平稳运行的作用~[1]。箕斗与钢丝绳之间的三角形连接板作为提升机悬挂装置的承力部件,是否处于水平位置关系着箕斗在运行中     

螺旋液压调绳器钢丝绳张力平衡方法

针对煤矿竖井多绳提升机普遍存在的钢丝绳张力平衡问题,提出凡使用螺旋液压调绳器悬挂装置的提升机,可以采用螺旋液压调绳器钢丝绳张力平衡方法,提升钢丝绳实现自动张力平衡,延长钢丝绳和摩擦衬垫使用寿命,保证提升系统运行安全。     

提升钢丝绳张力平衡状态的测定及调整

提升钢丝绳张力不平衡是多绳提升机区别于单绳提升机的主要特征。通过对由摩擦轮绳槽半径,钢丝绳悬挂长度及力学性能偏差等方面的分析,指出了造成钢丝绳张力不平衡的原因,浅述了用振波法测量钢丝绳张力及用标记法测量直径差的问题。     

多绳摩擦式提升机钢丝绳张力不平衡的防治对策

针对多绳摩擦式提升机在用绳实际使用过程中提升钢丝绳存在张力不平衡的主要因素进行归纳，从绳槽、更换、摩擦衬垫等方面，介绍了防治对策。     

摩擦提升机钢丝绳动态张力监测系统的设计

基于多绳摩擦式提升机存在的钢丝绳张力不平衡以及张力信号在井筒内传输困难的问题,为了准确测量钢丝绳的动态张力,设计了一种基于无线传输的多绳摩擦式提升机钢丝绳张力在线监测系统。通过现场工业性试验,结果表明,该系统能实时监测钢丝绳的张力平衡情况以及判断提升是否超载。系统安装方便,检测精度高,安全可靠。     

基于多绳摩擦提升张力的分析与研究

多绳摩擦提升机在生产实践中普遍存在着钢丝绳张力不平衡现象,介绍了张力不平衡产生的主要因素,并通过对钢丝绳张力的分析与检测办法,提出相应的改善方法,保证多绳摩擦提升机高效安全运行。     

多绳摩擦提升机钢丝绳张力不平衡原因分析及消除方法

介绍了多绳摩擦提升机在使用中会出现钢丝绳张力不平衡现象 ,以及钢丝绳张力不平衡所造成的危害 ,并对产生张力不平衡的原因进行了详细分析 ,从而有针对性提出了消除提升钢丝绳张力不平衡的方法     

鲍店煤矿主井提升钢丝绳张力监测系统的研发与应用

多绳摩擦式立井提升机日常运行过程中,提升机钢丝绳张力不平衡问题严重影响钢丝绳使用寿命,甚至威胁整个提升系统的安全运行,现结合煤矿提升机实际运行工况,提出一种针对上述问题的钢丝绳张力实时监测、预警系统。     

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     

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     

2014 second batch of rare earth quota released

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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