2013年1-7月铲土运输机械产品市场运行情况

数据来源:中国工程机械工业协会铲土运输机械分会1装载机市场销售情况2013年1-7月我国境内29家主要装载机生产企业共销售装载机112 619台,同比下降3.37%,降幅进一步缩窄,其中国内销量94 777台,占总销量的84.16%,同比下降3.44%。前两个月是装载机销售淡季,1月装载机销量较2012年同期增加了1 612台;2月销量降幅最大,仅销售8 170台,同比下降54.09%,销量相当于2010年的水平;3月进入装载机是销售旺季,销量较前两个月有明显上涨,共销售装载机24 612台,但同比下降6.16%。随后的四个     

装载机:中型比重不断提高 西部市场带动未来发展

<正>201 0年上半年,我国装载机销售总量为1 18 441台,同比增长65.4%。从各月销售情况看,除2月出现同比18.8%的下滑外,其余各月均保持同比正增长态势。值得一提的是,201 0年1月,我国装载机销量1 1 1 32台,同比增长190.0%,为前6个月增长率最大值,实现了装载机市场的提前复苏。进入传统旺季后,4月销量达到29 537台,为上半年销量之最。     

装载机:内销稳步复苏 行业集中度加强

<正>2009年,我国装载机销售总量为141 405台,同比下降13.9%。整体来看,2009年,我国装载机销售呈现出前低后高的态势。其中,上半年绝大多数月份的装载机销量都在下降,3月     

装载机 国产大吨位装载机海外认可度提升

中国工程机械工业协会铲土运输机械分会统计数据显示,2014年1—9月,我国主要装载机生产企业累计销售装载机124458台,与2013年同期销量138500台桐比,同比下降10.14%,降幅明显。其中,国内市场销量为105546台,同比下降8.78%,出口销量为18912台,同比大幅下降17.06%,出口降幅远高于国内降幅。我国装载机市场曾一度力求维持平稳过渡,但2014年前3个季度的表现令人失望。机型格局3c和5t装载机仍然是主力产品;与2013年同期相比,6t及以上大型装载机、1.5t以下的微型装载机和滑移装载机销量有所增长。     

2015年1-9月铲土运输机械行业整体情况

据中国工程机械工业协会铲土运输机械分会统计数据显示,2015年1-9月,我国主要装载机生产企业累计销售装载机59 073台,与2014年同期销量124 458台相比,同比下降52.53%,降幅明显。其中,国内市场销量为46 411台,与2014年同期销量105 546台相比,同比下降56.03%,出口销量为12 662台,与2014年同期销量18 912台相比,同比下降33.05%。     

任重道远的电动工程机械

2022年开年之后,中国工程机械国内外市场销量表现可圈可点,国内市场同比下降,出口销量继续延续同比高增长态势.据中国工程机械工业协会统计,2022年1—2月,共销售挖掘机40090台,同比下降16.3％;其中国内25330台,同比下降37.6％;出口14760台,同比增长101％.共销售各类装载机16480台,同比下降...     

装载机：集中度提高 主流企业力求突破

2008年上半年,装载机行业同比销量增幅近30％,但销量高速增长的势头在8月以后突然截止,至年底连续5个月同比出现负增长。2008年全年,装载机销售总量突破16万台,同比略有增长,其中出口15378台,同比增长58．9％。     

5月装载机销量大增近70%市场持续升温

<正>2017年5月,国内25家主要装载机生产企业合计销售各类装载机8524台,同比去年5月份5029台,大幅增长69.50%。最近8个月来,装载机有7个月实现同比正增长(仅3月份下滑20%);今年1-5月份,装载机累计销量为40493台,同比增长约26.06%,市场持续升温。5月份,3吨及以上装载机销量为7826台,占总销量92.23%;3吨以下小装销量为662台。各机型中,5吨装载机继续占据绝对优势,销量为5473台,占总销量比率提升至64.21%;其次为3吨机型,销量为1760台,占比达到20.65%。     

数字

36.2%2012年1—8月,中国挖掘机28家主机制造企业累计销售各类型液压挖掘机产品9 0073台,同比下降36.2%。其中第1季度共销售44 166台,2季度销售34 526台,3季度7—8月销售11 381台;对比2010年相关数据,3个季度同比降幅分别为5.4%、30.6%、35.7%,降幅正在不断扩大。据分析称,在主要的挖掘机制造品牌中,日系品牌在2012年1—8月实现销量21 865台,同比下滑48.8%;韩系品牌实现销量14 475台,同比下滑48.6%;欧美品牌实现销量11 814台,同比下降32.4%;国产品牌销量41 919台,同比下降20.5%。在整体下滑的市场环境中,市场集中度将可能出现一定幅度的提升。     

2004年一季度意大利工程机械销量统计

2004年一季度意大利工程机械销售市场呈现复苏,合计销售铲土运输机械、道路机械5605台,同比增长12.5％,其中铲土运输机械销售5372台,同比增长6.6％,道路机械销售233台,同比增长18.3％。另外,液压破碎锤合计销售681台,同比下降4.5％。 分机型看,轮式挖掘机的销量增长幅度最大,销售104台,同比增长62.5％;小型机械的销量最多,达3094台,同比增长5.3％。销量较大的还有轮式装载机433台,同比增长22.0％;履带     

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.