缠绕式超深矿井提升机钢丝绳在卷筒两侧挡绳板处需要借助结构合理的层间过渡装置实现换向和层间过渡,若层间过渡装置不合理,钢丝绳在层间过渡时因超深矿井提升系统运动时的高速、重载带来的严重冲击、振动从而引起钢丝绳的磨损和卡绳,还会影响钢丝绳排绳的平稳性,甚至会影响整个提升系统的寿命.针对这些问题设计出了一种新的可缠5层的多层缠绕层间过渡装置,并结合动力学仿真软件得到钢丝绳层间过渡、圈间过渡时提升系统的振动特性.

The rope groove structure of the winding hoist has an important influence on the smooth winding of the hoisting wire rope. The application of domestic spiral plastic liner and foreign parallel groove bushing was described. Aiming at the ultra deep mine hoist, the design, installation, maintenance and application in domestic coal mines of a new type of plastic liner for the parallel groove was introduced. This plastic liner for the parallel groove combined the advantages of spiral plastic liner and parallel groove bushing, making it easy to install and smooth in winding, which could meet the requirements of smooth winding for 2 ～ 4 layers of the hoisting wire rope in China.

为揭示多层缠绕卷筒的振动特性及矿井提升系统相关参数对其动力学响应的影响,以矿井提升机实验台的双折线卷筒为研究对象,利用变质量完整力学系统Lagrange方程建立圈间过渡激励下质量慢变卷筒的含耦合项振动方程.对所建模型进行了数值分析和实验验证.结果表明:推导出的方程较好地反映了卷筒的振动特性;卷筒两个方向的加速度幅值略有差异,卷筒两方向的振动加速度幅值都存在波动,且具有同步性;讨论了卷筒转速、卷筒非对称角、卷筒折线区圆心角、钢丝绳直径、密度等系统参数对卷筒振动加速度幅值的影响规律.研究成果有利于优化卷筒结构,对系统安全运行具有一定参考价值.

指出了机械零部件测绘实习包含的实质内容,制订了将三维建模融入测绘实习的教学安排,通过实例阐述将三维建模融入机械零部件测绘的教学模式,将三维建模融入机械测绘实习提高学生的工程实践能力.

在新工科背景下对三维工程图实训做出教学改革,提出线上线下混合式教学的新思想,改变传统的教学模式和教学观念,利用互联网优势和各大网络教学软件,充分调动了学生学习的主动性、积极性与创造性,有利于提高学生的学习效果,提高课程的教学质量.

为了适应超深矿井钢丝绳的多层缠绕和平稳过渡的需求,提出了一种新的层间过渡原理.设计了5层缠绕钢丝绳的绳槽,分析了绳槽主要结构参数选择范围和方法.根据钢丝绳平稳过渡条件,提出折线区圆心角的二次螺线计算方法.研究结果表明:绳槽间隙取0.03 d～0.4 d,绳槽深度取0.3 d～0.5 d,上层钢丝绳的圈数比下层钢丝绳的圈数多2圈;新型双折线绳槽能够实现钢丝绳的多层缠绕和整齐排绳,根据二次螺线方法得到的折线区圆心角能够使钢丝绳在缠绕过程中无滑动现象.

Fretting wear among steel wires under coupled tension-torsion force would aggravate the fatigue damage of wire rope, decrease the rope's service life, and ultimately threaten the safety of mine hoist. To explore the friction and wear behaviors of steel wires under coupled tension-torsion force and helical contact form, different fretting tests of steel wires were performed on a self-made test rig. The results show that the coefficient of friction (COF) decreases with increasing contact load and increases with the increase of sliding amplitude. When the contact load and sliding amplitude increase simultaneously, the COF is the maximum value of 0.23 for the convex contact pair, while it is 0.42 for the concave contact pair. The energy loss for the concave contact pair is faster than that for the convex contact pair. Furthermore, the wear depth and wear volume of wear scars increase with increasing contact load, sliding amplitude and their combination, respectively. The effect of the sliding amplitude on the friction and wear characteristics among steel wires is greater than that of the contact load. The common wear mechanisms of steel wires for the convex contact pair are abrasive wear and fatigue wear, while that for the concave contact pair is delamination wear. Additionally, the surfaces of wear scars for the convex contact pair are smooth, while that for the concave contact pair are rough.

缠绕式提升系统悬绳的横向振动是钢丝绳多层缠绕有序排绳和工程安全的主要评价指标.为了研究悬绳在不同形式绳槽激励下的横振响应,基于Hamilton原理建立提升系统振动方程,推导不同形式绳槽的激励函数,用Galerkin法离散振动方程,以某布莱尔式钢丝绳提升试验台运行状态曲线作为运动参数输入分析不同形式绳槽激励下的横振响应,用高速相机记录钢丝绳振动,并提出一种有效的图像处理方法,得到悬绳固定点处横振时域图,比较模型的数值仿真解与实验结果发现:在本实验台参数下,对称绳槽激励的悬绳横振大于非对称绳槽布置;悬绳横振的实测曲线与数值仿真变化趋势基本一致,实测频率与计算频率也非常接近,说明建立的边界激励下悬绳的横振模型是有效的.模型可为将来超深井提升卷筒绳槽型式的选择提供可靠的理论依据.

The forms of grooves on a drum for ultra-deep mine hoist have extremely important effects on vibration of hoisting wire rope and smooth winding.Here,the effects of transition zone between parallel broken line grooves of a multilayer winding drum on vibration of hoisting wire rope under different asymmetric parameters were studied.The suspension rope's lateral vibration of of hoisting wire rope was studied and its amplitude was taken as the evaluation index for asymmetric forms of multi-layer winding grooves.On the basis of studying the movement behavior in the transition zone of a mine hoisting system and wire rope,the dynamic partial differential equations of the hoisting system and the excitation function were established,and they were discretized into ordinary differential equations with Galerkin method.Taking a certain ultra-deep mine as an example,the effects of transition zone between parallel broken line grooves on vibration of the hoisting system under different asymmetric parameters were studied with numerical simulation.The results showed that either symmetric groove form or asymmetric one depends on the hoisting system's parameters.The study method and the study results provided a scientific guidance for correctly designing and selecting parallel broken line grooves on a multi-layer winding drum.

The ultra-deep mine achieve hoist by the wire rope multi-layer winding, the wire rope accomplish rising to higher layer through the riser and filler rings. Problems as serious abrasion and locking rope exists in the traditional Lebus device. Aiming at these problems, this paper design a new type riser and filler rings, and deduced the computational formula for the new device combines the kinestate of the wire rope. The design idea and computational formula could providing helpful reference in designing the riser and filler rings on multi-layer winding drum.

In a deep mine winding hoist system, the lateral oscillation of the catenary rope is an important evaluation index of orderly rope arrangement and engineering safety. Different boundary excitations will appear when the wire rope winds on symmetrical or asymmetrical grooves, which results in the different dynamic responses of the hoisting system. In this article, the vibration equations of a deep mine hoisting system are established by using the Hamilton principle, and excitation functions of different crossover zone layouts are deduced. The operation curves are introduced to conduct the experiment based on a certain experimental platform. The lateral oscillation of the catenary rope is recorded by high-speed cameras, and an effective image processing method is proposed to obtain the vibration response of a certain point in the catenary rope. The numerical simulations are compared with the experimental results to prove the vibration models derived in this article are valid. The models could provide reliable basis for the grooves type selection in deep mine hoisting.

对折线绳槽卷筒的1～2层与2～3层的过渡块做了较详尽的推导研究,独创性地推导了圈间过渡的理论公式,形成了较为完善的3层过渡块的计算式.

宁古齐村位于察布查尔锡伯族自治县察布查尔镇中,是个以锡伯族为主的多民族杂居区,其语言使用类型可划分为母语单语型、双语型和语言转用型三种类型.宁古齐村的锡伯族双语现象非常普遍,该村居民均为双语或多语人,汉语水平普遍较高.锡伯语-汉语是双语使用类型中的主要类型,其他两种类型的人群数量非常少且局限于特定的使用群体.

According to the practical needs of test bed of torque with high power for vibration and fatigue, the hydraulic servo sys-tem was designed.Dynamic simulation on the servo control system was done, mathematic model was built of the position control system and force control system, and the frequency analysis method was used for its dynamic performance.It provides a theoretical basis on the system control.

The traditional load balancing optimization scheme cannot guarantee the user’s QoS in the C-RAN wireless communication networks when all the neighboring macrocells are under the situation of overload. In order to resolve this problem, we implement the femtocell to the macrocell network, which considers the advantages of femtocell, i.e., small coverage, low cost and better signal quality. Therefore, in this paper, the joint load balancing mechanism is proposed to achieve the joint optimization of femtocell and macrocell network by allowing the users of overloaded macrocell to handover to the femtocell. Finally, the simulation results show that the proposed mechanism greatly improves the user satisfaction as well as the resource utilization rate of the femtocell network while decreases the blocking rate and dropping rate.

Mine hoist is an important piece of equipment in mine hoist systems, and we achieve deep mine hoist through the multilayer winding, but the cable always undergoes severe shock and vibration during the winding process, and the dynamic load and wear would greatly reduce the lifetime of the cable and cause potential safety hazard. In this paper, we start from the course of crossing over of winding cable, use the methods of differential geometry, mechanics, and mathematical analysis, study the movements of the crossover, and derive the important formula that can reduce the vibration of cable during the course of crossover: the formula about central angle of the crossover arc. The results display that four factors contribute to central angle of the crossover arc, that is, the gap of the rope grooves, friction coefficient of the cable, and diameter of the drum and the cable. The result can provide valuable information for designing multilayer winding mine hoist.

In the process of saffron machine harvest become difficulty lies in filaments are easy to fall, the bouquet is easy to damage,picking efficiency is lower.In this research,TRIZ theory is used to complete the design concept of the picking system and improve the key components in system.‘Substance-field’ model of harvest system is established.By analyzing the process of separating filaments and curd,and com-pleting ‘substance-field’of harvest system,to ensure through increase air assisted field form to realize the ideal relationship,to built leading,separation,collection of recovery system.Through physical contradic-tions on the recovery system analysis,using the separation principle in completing motor drive design.Ac-cording to the technical conflict theory analysis the structure and working principle of the roller,summa-rized the existing benefits and weakness in this system,used engineering parameters defining the contradic-tion in the theory of TRIZ,established the conflict matrix,get innovation to solve principle,complete the creative design of roller structure.

Aiming at the small whole stalk sugarcane harvester operating instability and the clogging easily of the conveying channel, the formation mechanism of sugarcane flow in the channel was stud-ied during the sugarcane harvesting. Dynamic models of sugarcane volume flow and mass flow were established respectively. The sugarcane harvesting experiment was conducted with the physical proto-type. The sugarcane flow dynamic models were verified by analyzing the experimental data. Work date was obtained to ensure a better harvest effects of impurity rate below 2%, tail docking rate a-bove 85%, and a the yield of 4 tons per hour. At the same time, the relationship between the size of sugarcane flow and machine parameters in channel was determined and the maximum load of sugar-cane flow was obtained under the current sugarcane agronomic condition. Finally, the design re-quirements for key nodes of conveying channel were analyzed to provide the design basis for sugar-cane harvester. From the perspective of the logistics system, the design demand of conveying chan-nel was studied by comprehensive multi index method. Working parameters of the machine optimal performance and the requirements for maximum service load under different conditions were obtained to improve the design of the harvester more specific and more reasonable.

<span id="ChDivSummary" name="ChDivSummary" class="abstract-text">针对翻秧过程中番茄损失较大的问题,用正交试验方法对试验进行规划,并对试验结果进行方差分析,找出对各指标有显著影响的因素。以三个工作条件为自变量,分别以工作效率、回沟率、果实损失率为应变量,用逐步回归法做多元回归分析,得到工作条件和工作效率、回沟率、果实损失率回归方程,并将观测值中的最优结果代入回归方程,联立方程组求得三个工作条件的最优解。</span>

This article is based on a certain type of hoist drum, Moreover, we make the stress and mode analysis for the drum, and make preliminary check on it. Then find the position of the weak section, we calculate the force in each stage of hoisting system and draw force-timing load spectrum,we translate it into stress function of weak link. Based on above studies and conclusion, in line with the materials of the drum and Fatigue characteristic parameters and appropriate fatigue lifetime prediction model, we analysis the fatigue performance, in the end get the distribution of the drum’s fatigue life and the life of plane of weakness.