工程机械液压系统的泄漏与防治

工程机械在长时间的使用时液压系统容易产生泄漏问题。因此,需要找到产生泄漏问题的原因,进而针对性地维修机械设备。本文主要介绍了工程机械液压系统泄漏的定义及分类,研究了工程液压系统泄漏的危害,探究了影响工程液压系统泄漏的因素,分析了工程液压系统泄漏的防治措施,阐述了控制工程液压系统泄漏应解决的问题。     

输油管道泄漏监测系统的研究

详细介绍了输油管道泄漏监测系统的总体组成结构、组成部分的功能、软硬件的设计及泄漏监测原理,重点研究了负压波理论在输油管道泄漏监测系统中的应用;给出了泄漏判断及泄漏点定位的算法,并对输油管道泄漏监测系统应用中存在的问题做了探讨.     

防泄漏煤气排水器安全应用的探讨

介绍了煤气排水器及防泄漏装置的工作原理,分析了正、反向密封型防泄漏煤气排水器在排水和防泄漏功能方面的优缺点,在此基础上对防泄漏排水器的安全应用进行了探讨,并提出了相关应对措施.     

分子筛纯化系统蒸汽加热器泄漏故障的分析及处理

介绍了分子筛蒸汽加热器的泄漏情况,对泄漏管束展开观察、金相分析、电镜扫描、能谱分析,查找产生泄漏的原因,提出了改进措施并实施。     

分子筛纯化系统蒸汽加热器泄漏故障的探析及处理

简述了分子筛纯化系统蒸汽加热器发生泄漏的经过及产生泄漏的原因,并制定了详细的处理方案,从而避免了在冬季停运时蒸汽加热器泄漏事故的发生。     

防泄漏煤气排水器性能分析

利用杠杆式防泄漏煤气排水器密封装置的力学模型,提出了防泄漏煤气排水器的基本不等式,并以此对防泄漏排水器的性能指标进行了计算和分析。     

点火调节阀填料泄漏分析及对策

某发电厂锅炉点火用给水调整门在几次点火过程中频繁出现填料泄漏,迫使锅炉点火中断,造成巨大经济损失,本文根据填料泄漏后的检查情况,分析了填料泄漏的原因,制定了防止填料泄漏的相应措施.对出现类似问题的电厂具有一定借鉴作用.     

锅炉循环泵密封泄漏的解决方法

该文详细分析了锅炉循环泵泄漏的原因 ,并介绍了解决泄漏的方法。     

液氯泄漏事故扩散范围预测

文章对液氯泄漏事故中氯气泄漏的范围用数学模型进行计算,并根据不同的泄漏量、泄漏时的风向、泄漏时间利用数学软件编程进行计算机画图,能迅速估算出不同条件下氯气泄漏的影响范围,对液氯泄漏时的预警有很好的实用效果.     

工程机械液压油泄漏故障和预防措施

液压油泄漏是工程机械液压系统普遍存在的故障现象。液压油泄漏故障分为内、外泄漏：外泄漏主要是指液压油从系统泄漏到环境中,泄漏的部位主要包括缸底、各管接头的连接处等;内泄漏是指液压油在系统内部由高压侧流向低压侧,泄漏的部位主要包括油缸活塞杆部位、多路阀阀杆等部位。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.