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。     

浅谈矿山机械设备的保养与维修信息化技术在矿山机械管理中的应用研究

为了体现“以人为本、关爱生命”的理念,矿山机械设备的管理对矿山企业进行正常的生产,确保矿山生产安全有着特殊的意义。本文探讨了矿山机械设备的保养与维修信息化技术在矿山机械管理中的应用,并阐述分析了相关的内容。旨在抛砖引玉,以求金言。     

矿山机械的故障维修处理研究

开展好矿山机械设备维修处理是实现矿山生产目标的重要前提,必须强化对矿山机械设备的维修处理。通过阐述矿山机械故障特征,分析矿山机械设备故障诊断方法,对矿山机械故障维修处理方法展开探讨,旨在为矿山机械设备安全有序运行提供一些思路。     

矿山机械标准化现状及发展探讨

由于矿山机械现有标准体系和现行标准基本上是按计划经济管理模式和政策制定的，随着我国的经济体制由计划经济逐步向市场经济转变，矿山机械标准现状已很难适应现有的技术与市场形势。本文对目前存在的问题及发展作一些探讨。1矿山机械标准化现状（l）标准构成矿山机械产品属于小批量、多品种、使用面广的机械设备，按用途分为采掘设备、提升设备、矿用车辆、破碎粉磨设备、筛分设备、洗选设备及焙烧设备七大类。矿山机械行业原有国家标准、行业标准和行业内部标准300余项。1997年根据机械工业部的要求，全国矿山机械标准化技术委员会对199…     

矿山机械设备供电网络智能监测设备设计方案

提出了基于现场总线技术的矿山机械设备供电网络的集中监测和控制系统,该系统自动化程度高、控制精确度高,能够对矿山机械设备供电网络的运行情况进行实时监测、控制,极大地提升了矿山机械设备供电网络的运行效率和安全性。     

浅析矿山机械设备的养护与维修技术

随着科技的发展,很多企业在生产过程中使用了大量机械设备,矿山企业也是如此。因此为保证矿山企业的生产效率,需加强对矿山机械设备的养护及维修,保证机械设备可稳定运行。本文分析了矿山机械设备故障特点及故障原因,并研究了矿山机械设备的养护与维修方法。     

世纪之交矿山机械工程学科的发展趋势

探讨了世纪之交了山机械工程学科的若干重要发展方向．介绍了这些方向的研究现状及发展趋势。其中涉及矿山机械工程的机电一体化技术、新材料技术以及矿山机械设备的状态维修与工况监测技术等内容。     

探析无损检测技术在矿山机械设备的应用

针对目前矿山机械设备应用无损检测技术过程存在的问题,本文从实践角度出发,分析了超声无损检测技术的工作原理,并提出了应用控制水平提升的策略,为相关建设者提供一些理论依据。结果表明,只有在明确技术应用工作原理的情况下,才能提升矿山机械设备运行使用的可靠性与可持续性。     

矿山机械设备破碎机的故障诊断与维护技术

伴随着科学技术的不断发展和进步,矿山机械设备得到了大量的开发和使用。在采矿过程中,需要使用破碎机械、分选机械、研磨机械等设备,但是过度使用机械设备会导致机械故障。矿产资源能否有效开发,直接影响到我国的工业体系,矿山机械设备的故障诊断和维修在矿产资源开发中起着重要的作用。本文对在矿山机械设备中的破碎机故障诊断与维修进行了分析和探讨,以便于将一些帮助提供给提高矿山机械设备的故障诊断与维修工作。     

矿山机械设备使用及维护的相关探讨

矿山机械设备在使用的过程中,出现故障问题的概率比较高,要求在长时间的使用过程中,必须要保证使用科学性、合理性,同时还要做好相关的维护管理,减少故障的出现,延长设备的使用寿命,充分发挥其应用的功能价值。文章分析了矿上机械设备使用寿命的影响因素,并分析了矿山机械设备常见的诊断技术,探讨了矿山机械设备使用及维护的措施。     

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.     

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。     

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....     

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.