4000 kN矿用输送带卧式拉力试验装置设计与研究

设计一种输送带拉力试验装置,用于分析矿用输送带的极限承载力等安全技术参数。通过试验动力装置、测力装置、夹紧装置以及调节装置的设计,可以机械化调节试验空间和夹紧被试输送带,试验空间达到13 m,试验有效载荷达到4 000 k N。可对各种型号的矿用输送带进行分析试验,提供输送带极限破断力数据,为矿用输送带改进设计提供理论依据。     

阻燃输送带接头寿命试验装置控制系统的设计

为提高整芯阻燃输送带机械接头运行寿命试验装置的技术检测水平,对其控制系统进行改进提高。该系统可对试验装置进行就地手动控制和中央计算机控制,驱动电机部分采用变频器控制方式。采用液压系统对在检输送带受到的拉力以及输送带的位置偏移进行调节,输送带位置的偏移利用光电接近传感器进行修正,利用电感式接近传感器可进行周转次数的测量。该控制系统已通过验收并投入使用,满足设计要求。     

基于PLC控制的可伸缩输送带架装置控制系统研究

分析了综采工作面可伸缩输送带架装置工作原理,通过研究手动操作实现可伸缩输送带架装置运行的工作原理,结合该装置井下工作工况,设计了基于PLC控制的可伸缩输送带架装置控制系统。该系统应用于新研发的可伸缩输送带架装置上,通过结构创新引进激光扫描仪、数字油缸、倾角传感器以及PLC。PLC从传感器中读取数据,利用接收到的数据进行程序计算,再通过电磁阀控制油缸工作。该装置的调偏、调整输送带跑偏以及前移全部实现自动化控制,同时实现全程监测,实现了可伸缩输送带架装置的智能化,为实现煤矿综采工作面高产、高效运输提供了可靠的保障。     

输送带变速驱动装置的设计

针对在一些物料的传送过程中有时需要对输送带的传送速率进行调整变速,而普通的输送带无法对速度进行调节的问题,设计了一种输送带变速驱动装置。包括左右相对的支撑板、调节气缸、驱动电机、驱动圆柱轴、驱动扁圆轴、调节套、连接头、调节气缸的输出端、4个调节齿轮和4个齿轮组等装置。调节速度的过程不需要对驱动电机进行调整,只需通过控制调节气缸的输出端的位置进行调节,能够达到对输送带传送速度的逐级调节效果。     

大倾角斜巷带式输送机输送带展放制动装置

输送带展放在斜井带式输送机安装工程中是一项复杂且危险的工作。在展放过程中,由于输送带自重产生下滑而产生一些不安全事件,所以应设置制动装置。制动装置可以调节或限制输送带的下放速度,是保证输送带展放安全工作的主要装置。     

四台矿带式输送机防跑偏装置的应用研究

为了解决四台矿带式输送机工作过程中输送带经常跑偏的问题,提出了一种带式输送机防跑偏装置,采用调整输送带托辊支架的方案来对输送带调整托辊的摆角进行调节,实现对输送机的动态纠偏。     

带式输送机液压自动张紧装置设计

对带式输送机的液压自动张紧装置和重锤式自动张紧装置的优缺点进行比较,液压自动张紧装置能根据带式输送机的工作情况自动调节张力大小,以保证输送带在最佳张力下运行。带式输送机启动时增加张力,正常运行时降低张力,并在运行过程中随时调整张力,保证输送带始终不打滑,又尽可能在低张力下运行,以延长输送带的使用寿命。     

带式输送机间歇驱动装置的设计

针对传统带式输送机无法实现输送带间歇前进输送物料而不能满足生产工艺要求的问题,设计了一种带式输送机间歇驱动装置。包括输送带轮、传送带、输送带轮转轴、转动轴套、输送带轮支架、输送带轮底座、槽轮、拨盘、固定拨杆、圆销、拨盘转轴、转动驱动电机、固定杆、活动拨杆等装置。调节速度的过程不需要对驱动电机进行调整,通过形成周期性间歇运动,转动驱动电机驱动拨盘转轴转动,在需要提高运动的频率时,可将活动拨杆翻折至与固定拨杆在同一平面内,与固定拨杆协同工作,不使用时将活动拨杆向前翻折,实现间歇运动频率的可调节。     

可调式压带装置在带式输送机的运用

对带式输送机在变角度地形条件下所引起的飘带现象进行了分析,并对原有压带轮进行了重新设计改进,采用可调式压带装置保证了输送带在工作中受力均匀,同时也避免了磨损,提高了输送带的使用寿命。     

同步变频驱动技术在带式输送机中的应用

为了解决带式输送机运行过程中输送带过度磨损和拖动耗能现象,应用了同步变频驱动装置。应用这种装置调节拖动转速方法,通过平稳启机、平滑调速与自适应制动达到降低耗能的改进效果。以常村煤矿带式输送机为例进行分析,该同步变频驱动技改方案能达到带式输送机运行平稳、调速平滑与节能减耗的目的,取得了良好的效果。     

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     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.