液压

In the design,It causes the hydraulic cylinder with a movable pulley the stroketo reduce one half, and avoides using a stroke longer hydrauliccylinder.In this way,it reduces difficulty of thehydraulic cylinder's produce.

在设计中，用一个动滑轮使液压缸的行程减少了一半，避免使用行程较长的液压缸，减少了制造液压缸的难度。

This item is a new type structure direct-acting overflow valve, which adopts dynamic pressure feedback principle. That is it adds a feedback cavity on common direct-acting overflow valve's core. When there is overfall on valve port, the hydraulic force of valve port will balance with feedback cavity's hydraulic force and spring force, so it can decrease spring's stiffness, just like adding a hydraulic spring, which works together with mechanical spring, so as to minish valve port pressure range.

本项目是一种新型结构的直动式溢流阀，采用动压反馈原理，在普通直动式溢流阀阀芯上增加一反馈腔，当阀口溢流时，阀口的液压力与反馈腔液压力和弹簧力相平衡，从而可以减小弹簧的刚度，等于增设了一根液压弹簧，使其和机械弹簧一起工作，以达到减小阀口压力变化范围的目的。

Using AMESim software, the vector control three phase asynchronous motor simulation model was established based on the analysis of the principle of three phase asynchronous motor simulation.

建立变频液压容积调速和节流调速相结合的复合调速系统，通过分析矢量控制三相异步电机的原理，利用AMESim软件建立了矢量控制的三相异步电机的仿真模型，并与液压系统仿真模型相结合，建立了矢量控制变频液压容积节流调速系统的仿真模型。

A compound hydraulic system with variable frequency control, a throttle and variable displacement speed control was established. Using AMESim software, the vector control three phase asynchronous motor simulation model was established based on the analysis of the principle of three phase asynchronous motor simulation.

本文将节流调速和变频液压技术有机地结合起来，以解决变频液压容积调速在大惯量、低转速、变负载系统中的应用问题，利用AMESim软件建立了矢量控制的变频液压容积节流调速系统仿真模型，并对该系统进行了性能仿真。

All the work actuating parts for the movement of the pile driver are controlled by hydraulic system .

桩机所有运动的工作执行部件均由液压系统控制，为保持液压系统的可靠性与稳定性，液压介质设有降温系统。

Main Contents and Investment Scale: The construction project focuses on producing ship matching products including auxiliary project for the power station: marine diesel engine and marine generator; Auxiliary parts and equipment for cabins: marine gear box and electronical controlling device; pumps and valves: hydraulic rubber tubes, hydraulic oil cylinders, various valves, various pneumatic actuators, electric actuators, magnet valves, pressure regulators and electric appliance localizers etc.; marine electric appliance: marine APT series of pilot lamp buttons, GMC series of LG low-voltage electric appliances, voltage regulators, marine power distribution boxes, deck machinery: marine crane, electric hydraulic reamers, anchors, various hoists, marine materials: marine stainless steel pipes, marine watertight doors, portholes, rectangular windows, hatch covers, spring dragging hooks, coarse water screens, marine steel plates, marine communication navigators etc..

项目名称：船舶配套。2、项目主要内容及投资规模：建设项目以船舶配套产品为主，包括主机电站类的船用柴油机、船用发电机；机仓辅机类的船用齿轮箱、电子控制装置；泵、阀件类的液压胶管、液压油缸、各种阀门、各种气动执行器、电动执行器、电磁阀、调压阀、电器定位器等多种阀门配件、各种船用泵类；船用电器类的船用 APT 系列指示灯按钮、 GMC 系列 LG 低压电器、电力稳压装置、船用配电箱；甲板机械类的船用起重机、电动液压绞车、锚机、各种吊机等；舾装材料类的船用不锈钢管、船用水密门、舷窗、矩形窗、舱口盖、弹簧拖钩、粗水滤、船用钢板；船用通讯导航类设备等。

According to the results of stress calculation, provided the choosing basis for structure parameters of hydraulic cylinder and advanced a new cylinder bottom structure-oblique plane check ring concave groove.

对 10MN闭模挤压液压机卡环式液压缸进行有限元应力分析，根据分析结果，给出了液压缸缸底结构参数的选取依据，并在此基础上提出了一种斜面卡环凹槽新结构，有效解决了大型卡环式液压缸卡环凹槽的应力集中问

Place a thing, heap a Duo, hang a plank, stainless steel work set, wood tray, steel tray, plastics tray, warehouse cage, anticipate a box, hand plank car, mute cart, ascend Gao Che, logistics trolley, carry thing trolley, liquid to press rise and fall terrace, liquid to press to ascend car bridge, hand to move a liquid to press tray porterage car, from walk type electricity the liquid pack to unload a fork car, transport a Gun way...etc.

蓝宇达公司主要产品：轻型货架、中型货架、悬臂式货架、贯通式货架、辊轮式货架、横梁式货架、重力压入式货架、抽屉式货架、汽车配件库货架（4S店专用）、阁楼式货架、不锈钢货架及周边设备（置物架、堆垛架、挂板架、不锈钢工作台、木托盘、钢托盘、塑料托盘、仓储笼、料箱、手板车、静音手推车、登高车、物流台车、载物台车、液压升降平台、液压登车桥、手动液压托盘搬运车、自走式电液装卸叉车、输送辊道等）。

In order to design lighter and faster hydraulic excavator, a rigid-flexible hybrid modeling method based on rigid multi-body dynamics and finite element method was put forward to study the dynamic characteristic of hydraulic excavator in its whole working cycle. The working equipment with characteristic of time-varying structure was taken as research object, and radial acceleration was computed as tags of key load.

为适应液压挖掘机高速、轻量化的要求，以具有时变固频特性的液压挖掘机工作装置为研究对象，提出了以角加速度判断时变结构的关键工况，利用刚性多体动力学和有限元方法对液压挖掘机在整个作业循环中的动力学特性进行建模和分析。

This paper gives the experiment and the result of fault diagnosis of the electro-direction valve and relief valve.

本文以液压系统中的电磁换向阀和溢流阀故障为例，论述了基于上述两种神经网络方法的液压系统工作过程中液压元件故障的诊断过程和结果。

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。