液压

This text is mainly aboutthe mechanical hydraulicpart design of WY-type freight car wheel rollingbearing push mounting machine.

本文主要是针对WY型货车轮对轴承压装机的机械液压部分进行设计。

On this basis, through the MATLAB software to map out the bode diagram of frequency characteristics of load stiffness, the relationship between the load changes frequency and the system stiffness was analyzed, the main parameters affecting the system stiffness were obtained.

在此基础上，通过MATLAB软件绘制出了负载刚度频率特性伯德图，并对负载变化频率与系统刚度的关系进行了分析，得出影响系统刚度的主要参数，为负荷传感型全液压转向系统的设计与改进提供理论依据。

The stability and the frequency response of the system are analyzed.

本文首先建立了液压伺服系统阀控马达动力机构的非线性模型，并在此基础上建立了系统的线性模型。

For nonlinear friction force in hydraulic position tracking system, partition compensation is to solve the problem of large approximation error caused by non-smooth characteristic of friction when the whole friction is compensated by one fuzzy neural network.

针对液压位置跟踪系统中的非线性摩擦力，提出对摩擦力模型的不同分量分别进行补偿的分部补偿算法，以解决用模糊神经网络对摩擦力整体进行补偿时，因摩擦力非光滑特性引起较大逼近误差的问题。

This thesis mainly researches on following aspects: the structure , the working principle and the whole device parametrical model of soft start device for belt conveyer ; mechanism movement simulation; and properties of hydraulic-viscous friction drive . It also designs the hydraulic control systems and electrical control systems.

本文重点研究了带式输送机软启动装置的结构、工作原理、整机的参数化建模、机构运动仿真以及液粘摩擦传动的特性，设计了该装置的液压和电气控制系统。

Inside, hydraulic driving is applied and friction force with tape is power resource. System can automatically distinguish the belt conveyers loads and the condition carrying idler, and realize carrying coal and spraying linked. It has got fine effect in scene application.

把动力部分、传动部分、控制部分、执行机构集成一个整体，在内部采用液压传动，依靠与胶带产生摩擦力作为动力源，并且可自动识别胶带机的负载和空载情况，使运煤和喷雾联动，在现场应用中取得了良好的效果。

The present paper design content is the expandable belt feeding engine, is transmits the force of traction through between the transmission drum and adhesive tape's friction force, concurrently makes the hauling organization and the load bearing organization one kind by the adhesive tape for the material equipment, expands and contracts the arm rear part establishment to have the expandable hydraulic prop, causes the complete machine length nimble elongation or the reduction, between the supporting roller the included angle increases to causes the belt fastener inclination angle to be possible to amount to 25 degrees, has for estimates in a big way, the transportation is steady, the service is convenient, the area slightly and so on characteristics, brings conveniently to the load, can the widespread application in each kind of bulk collection and distribution center production scene.

本论文设计内容是可伸缩带式给料机，是通过传动滚筒与胶带之间的摩擦力来传递牵引力，以胶带兼作牵引机构和承载机构的一种给料设备，伸缩臂尾部设置有可伸缩的液压支柱，使整机长度灵活的伸长或缩短，托辊之间夹角增大可使皮带机倾角可达到25度，具有给料量大，运输平稳，维修方便，可多点卸料，占地面积小等特点，给装车带来方便，能广泛的应用于各种散料集散地的生产现场。

The present paper design content is the expandable belt feedingengine, is transmits the force of traction through between thetransmission drum and adhesive tape's friction force, concurrentlymakes the hauling organization and the load bearing organizationone kind by the adhesive tape for the material equipment, expandsand contracts the arm rear part establishment to have theexpandable hydraulic prop, causes the complete machine lengthnimble elongation or the reduction, between the supporting rollerthe included angle increases to causes the belt fastenerinclination angle to be possible to amount to 25 degrees, has forestimates in a big way, the transportation is steady, the serviceis convenient, the area slightly and so on characteristics, bringsconveniently to the load, can the widespread application in eachkind of bulk collection and distribution center productionscene.

本论文设计内容是可伸缩带式给料机，是通过传动滚筒与胶带之间的摩擦力来传递牵引力，以胶带兼作牵引机构和承载机构的一种给料设备，伸缩臂尾部设置有可伸缩的液压支柱，使整机长度灵活的伸长或缩短，托辊之间夹角增大可使皮带机倾角可达到25度，具有给料量大，运输平稳，维修方便，可多点卸料，占地面积小等特点，给装车带来方便，能广泛的应用于各种散料集散地的生产现场。

The hydraulic loading system is developed and used to study the frost heaving characteristics of the subgrade soils under dynamic loading in closed system and open system . On the base of these work, the conclusions are as follows:1. Because of the the fine-grained fill, the frost deformations of Beijing-Baotou railway subgrade and Baotou-Lanzhou railway subgrade are holistically irregular, and great discrepancies exist among the frost heavings of subgrade at different sections.

本文根据冻害较严重的京包铁路、包兰铁路的气候、地质条件的调查和路基冻胀变形监测，结合路基土的性质对京包铁路、包兰铁路的冻害给出了评价；为了模拟振动荷载作用下土的冻胀，研制了液压动力加载系统；在室内采用实验方法对列车动荷载作用下包兰线路基粉质土在开敞、封闭系统下的冻胀特性进行模拟。

Concrete and other hydraulic cylinder used new technology and new technologies, using concrete cylinder block IF processing technology, using carbon and nitrogen sulfur fuel tank rod permeation technology, the service life of the fuel tank and concrete cylinder life greatly increased.

另外液压油缸和砼缸采用新工艺和新技术，砼缸缸体采用中频处理技术，油缸活塞杆采用碳氮硫共渗技术，使油缸使用寿命和砼缸使用寿命大大增加。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。