运用润滑管理可靠性评估提升设备管理水平

润滑可靠性评估是以油品的全生命周期管理和设备安全可靠性管理为主线,以设备润滑技术为基础,针对企业润滑全过程开展系统性评估的一套评估体系。本文通过分析矿山行业设备特点和设备润滑现状,指出了矿山企业开展润滑管理可靠性提升工作的重要性,从润滑油品抽样检测、润滑油品选型优化、润滑可靠性管理体系建设方面,规范全公司润滑管理工作,全面提升公司设备的润滑技术管理水平。     

“招金”施行润滑管理可靠性评估效果显著

本文分析了矿山行业设备特点和设备润滑现状,指出了矿山企业开展润滑管理可靠性评估(APL)提升工作的重要性。招金矿业股份有限公司(以下简称"招金")通过加强润滑油品抽样检测、润滑油品选型优化、润滑可靠性管理体系建设,规范了润滑管理工作,产生了明显效果。     

全面润滑管理提升在金矿企业中的应用

招金矿业拥有从勘探、开采、加工到冶炼为一体的完整专业化黄金和有色金属产业链,整个生产工艺流程中涉及大量的油润滑设备,用到的润滑油种类达307种。通过润滑可靠性评估、油品选型优化、现场标准化提升、润滑管理体系宣贯等润滑管理专项的开展,润滑油种类下降为37种,油品年采购费用下降20%多,设备润滑可靠性大幅提升,有效地改善了企业设备先进、润滑管理落后的局面。     

壳牌助力矿山行业可持续发展

壳牌全球产品应用专家曹利民先生受邀参加2014年中国露天采矿工作会议,并于会上向在场的嘉宾学者展示了壳牌领先的润滑科技和产品应用,其完善的润滑解决方案将为矿山企业降低设备运维成本,提高矿山企业的运营效率。曹利民先生在机械设备领域浸染23载,丰富的行业经验使他更了解矿山机械的设备制造及润滑油产品运用情况,在现场演讲中他提到,近5年来,壳牌全球平均每年投入10亿美金用于技术研发,并于今年四月成立的壳牌全球第三个润滑剂和油品研发中心——壳牌上海研发中心,将为矿山行业润滑产品研发和应用服务提供强大助力。     

提质增效的必修课

设备“血液”科学呵护三问
　　科学地呵护设备“血液”的确是设备节能增效的有效手段之一。在包钢,油品检测中心、油品精益管理等润滑管理系统正日益彰显着它的功效……从2012年至今,面对油品种类繁多及降本增效的迫切需要,包钢通过实施上述一系列新举措,优化了油品使用结构,提升了油品质量,减少了用油品种和设备故障,并降低了库存。据统计,2013年因液压润滑系统维护、使用、管理不当造成的设备故障大幅下降,液压润滑类统计事故几乎为零,大大提高了设备的运行效率。     

基于系统节点的润滑精细管理

提出基于系统节点的润滑精细管理体系,包括目标体系、责任体系、运行体系和考核体系。该管理体系将润滑工作划分为油品物流管理、油品使用管理、润滑投入管理和润滑保障建设等4个分系统,并将每个分系统内的工作重点和难点确定为管理节点。油品物流管理注重油品入口和流通环节的管理;油品使用管理注重设备用油合格和检测;润滑硬件管理重视润滑投入和配置;润滑保障体系注重制度建设和信息化提升等内容。结合胜利油田总结基于系统节点的润滑精细管理的推行成效。     

矿山机械设备的故障诊断及修复研究

矿山机械设备是矿山企业生产经营中应用的重要设备,一定程度上体现了矿山现代化水平。矿山机械设备的长期良好运行,对于矿山企业的生产安全和健康具有重要意义。然而,矿山机械设备故障时有发生,已经影响到了矿山企业的安全生产与运营。文章主要对矿山机械设备的故障特征、故障诊断方法进行分析,并提出了几点矿山机械设备故障修复策略。     

试析矿山机械设备润滑管理措施

现代化科学技术高速发展背景下,矿山生产中的机械化水平越来越高,机械设备成为矿山生产的必备条件之一,与整体矿山生产效率息息相关。但是在机械设备长时间运行下,容易出现很多故障问题,影响设备正常运行。因此需要结合实际情况,强化矿山机械设备润滑管理力度,提升机械设备保养水平,保障矿山机械设备始终保持正常的运行状态,延长使用寿命,促进矿山生产的高效运行。本文主要对矿山机械设备润滑管理方法进行分析,旨在进一步提升矿山机械设备润滑管理水平,保障机械设备的安全运行,减少设备故障,为矿山生产作业的顺利进行奠定良好的基础。     

机械设备安全生产管理的重要性及其强化措施

矿山企业是工业中重要组成部分,对我国的经济发展具有重要意义。矿山机械设备安全生产管理不仅关系矿山企业的生产效率,也影响工作人员的生命安全。本文简述了矿山企业生产管理的现状,重点论述了矿山机械设备安全生产管理的重要性及强化措施。希望通过本文的论述给更多矿山企业在生产管理方面提供借鉴意义。     

火电厂油品优化整合探讨

针对火电厂存在的油品种类多和润滑管理不规范的问题,提出润滑油优化整合流程。首先对不同设备的在用油品进行统计分类,然后通过现场设备在用油品及新油检测,了解各类油品性能及设备用油要求,并形成初步的油品优化结果,最后对现场替换油品跟踪监测,对存在异常情况及时进行处理。火电厂的润滑油优化整合,对企业正确用油、降低采购成本、提升润滑管理水平等具有重要的意义。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.