液压

Introduces a coal mine hydraulic support repairing actuality and a type of special disassembly machine using to disassembl hydraulic support ,discuss its composing structure,work principle,hydraulic system,suit work conditions,main specialty,point out this machine to solution technice problem,and using this machine for attainability purpose.

介绍了煤矿单体液压支柱维修现状和一种用于单体液压支柱拆卸的专用拆卸机械，讨论了该机的结构组成、工作原理、液压系统，适应工作条件，主要特点，指出该机所解决的技术问题以及采用该机可达到的目的。

Plant materials are divided into hydraulic balers, semi-automatic hydraulic baler hydraulic machinery and so on.

厂品分为液压打包机、半自动液压打包机等液压机械。

Back-up Wrench Group 背钳组 Offered as an option and mounted to the Top Drive Gear Box is a Hydraulic Back-up Wrench Assembly.

被提供作为一选件而安装在顶驱齿轮箱的是一套液压背钳总成，背钳包括一套液压开动的震击器和一条液压伸缩的腿，同时安装在大钳底部的是扶正喇叭口。

The membrane isolation pumps is one kind of hydromass transportation hydraulic system,can reduce the cartage expense greatly,but indirectly brings the huge social efficiency,safe reliable,the work rate is high,may not stop nearly carries on the whole year to transport,does not have the material to lose nearly,the easy automatic control,to be advantageous for the maintenance management The hydraulic pressure diaphragm pump is one kind of fill domestic diaphragm pump which we develops in high-pressured,the small curr ent capacity pulp transportation aspect blank pumps plants,it and the common diaphragm pump main difference is:Has substituted for the crank connecting rod,the reduction gear using the hydraulic pump and so on aseries of equipments direct drive piston motion,this causes its structure is greatly the simplification,the cost drops greatly;When at the same time also requests the piston the commutation confidential assurance extremely accurately,but must realize this point theoretically and all has the very great difficulty in fact.

膜隔离泵就是一种浆体输送的液压系统，能大大降低运输费用，可间接带来巨大的社会效益，安全可靠，作业率高，几乎可不停地进行全年输送，几乎没有物料损耗，易于自动控制，便于维护管理。液压隔膜泵是我们开发的一种填补国内隔膜泵在高压、小流量矿浆输送方面空白的泵种，它与一般的主要区别是：利用液压泵取代了曲柄连杆、减速器等一系列装置直接驱动活塞运动，这使其结构大为简化，成本大大下降；但同时也要求活塞的换向时机要把握得非常准确，而要实现这一点理论上和实际上都存在很大难度。

On the basis of analyzing the reason that produce hydraulic impact, the dynamics of vibration wheel of vibration compactor and dynamics of vibration hydraulic system were analysed, the mathematics model of vibration hydraulic system was set up and its output models for pressure and flow were deduced.

在分析液压冲击产生原因的基础上，进行了振动压路机振动轮的动力学分析和振动液压系统的动态分析，建立了振动液压系统的数学模型，同时推导出系统压力和流量的输出模型。

After analyzing the characters of current hydraulic CAD, the method was put forward to use concurrent computer supported cooperative work to regulate hydraulic CAD, and to realize assistant graphics element drawing, principle drawing formation, data exchange, network communication and background data - base service by employing object - oriented technology, dialog box and control widget technology, input - output of graphics ＆ image and socket technology.

在分析当前液压CAD的特点之后，提出了用并行协同设计模式规划液压CAD，运用面向对象（object-oriented）技术、对话框和控件技术、数据库图库存储提取技术、导入导出图形图像技术和socket技术，具体实现了辅助图元绘制、原理图生成、数据交换、网络通讯和后台数据库服务各个功能，使液压系统计算机辅助设计得到进一步的完善。

The analysis results show that the energy loss is related with the lenght and the flow quantity of connective pipe, and cross sectional area ratio between the pipe and hydraulic accumulator, which will be helpful for the design and engineering installation of the hydraulic accumulator.

分析表明，液压蓄能器的能量损失与连接管道的长度、流量的大小、连接管道横截面面积与液压蓄能器横截面面积之比有关。研究结果对液压蓄能器的设计和工程安装有参考意义。

So the effect of the hydraulic hammer performance are found by cubage cavity. It is helpful to improve the design parameters of the hydraulic hammer.

找到了液压容腔对液压破碎锤性能的影响，有利于改善和优化液压破碎锤的设计参数。

Second, the array of product categories more than 20 years, the company's long-term commitment to the hydraulic lifting platform for research and development, continuous improvement and innovation in enterprise products, existing products: high-altitude platform, self-propelled platform lift, fixed-take-off and landing platform , Hydraulic Deng axles, hydraulic and a series of flip-products, the Company specifically for the fifty-first in Shanghai by the military created a mushroom-shaped radar lifting platform, has been the praise on the military.

二十多年来，公司长期致力于液压升降平台的研制和开发，不断的改进和创新企业的产品，现有产品：高空作业平台、自行式升降平台、固定式升降平台、液压登车桥、液压翻转架等一系列产品，本公司专为上海市第五十一所制造了蘑菇形军用雷达升降平台，得到了军方的赞评。

Supporting type is suggested to be developed into 3-prop to improve adaptability besides 2-prop and 4-prop. The difference of caving difficulty degree of coal seam is the base of caving coal method at high, medium and low position. Caving with small step and open caving flashboard used widely not only cause serious mixture of coal and rock but also hinder the improvement of top coal recovery. So we suggest caving with large step or closing caving door. Four-bar-mechanism of hydraulic support restricts development of new style caving powered support. Stabilization framework of expansion link and all-shield caving tail beam at high, medium and low position are introduced here.

支架支护型式，除了两柱、四柱以外，建议开发三柱支架以改善适应性；煤层冒放性的差异，是高位、中位和低位放煤方法存在和使用的依据；目前广泛采用的小步距放煤和开放式放煤插板不仅造成严重混矸漏矸，也妨碍顶煤回收率的进一步提高，建议采用大步距放煤和可关闭放煤口；液压支架四连杆稳定机构，制约了新型放顶煤液压支架的开发，介绍了液压支架伸缩杆稳定机构及全掩护拖移高位、中位和低位放煤尾梁。

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。