液压

Firstly, this paper analyzes the transmission style of diving machine in detail and selects hydrostatic transmission as transmission manner of Heavy Engineering Transporter. Then we analyze the principle of hydrostatic transmission, control style of hydraulic components and the basic driving theory of transporter and pay attention to solve the problems of driving speed-regulation control when transporter runs on different road surface and differential speed control ensured every wheels pure roll when transporter is in swerving.

接着分析了静液压传动的液压原理、静液压传动液压元件的控制方式和汽车行驶理论基础，主要解决了以下控制问题：(1)车辆在不同工况下行驶时，选择不同速度的整车调速控制；(2)车辆转弯时，为确保车轮实现纯滚动，而使各驱动轮按设定规律运动的差速控制；(3)车辆从一坡度过度到另外一坡度时，使每个驱动桥实现同步的桥间差速控制。

The theoretical foundation for further research is established. In chapter 6, the flow field of poppet valve and spool valve which are two kinds valve frequently used in hydraulic technique are predicated by finite element method. The flow field structure at different valve opening are illustrated by visualizing images. The effect on the flow noise and energy loss probably caused by vortexes is analyzed quantitatively, the flow channel of the valve is improved.

第六章用有限元方法对液压传动与控制中最常见的两种结构形式的液压阀—液压滑阀和液压锥阀流场进行数值预报，给出不同开口度和不同结构尺寸下流场结构的可视化图像，定性分析涡旋的产生对流体噪声及能量损失可能产生的影响，并对阀的流道结构进行改进。

Through technological transformation and technology research, and a number of major enterprises to furth

目前我国已和美国、日本、德国等国著名厂商合资或由外国厂商独资建立了柱塞泵/马达、行星减速机、转向器、液压控制阀、液压系统、静液压传动装置、液压件铸造、气动控制阀、气缸、气源处理三联件、机械密封、橡塑密封等类产品生产企业50多家，引进外资2亿多美元。

Its main products: multifunctional cold hydraulic riveting machine, four-post guided presses, clutch pressure plate assembly machine, T8360A/60B (T8366)-type brake hub boring machine, electro-hydraulic brake shoe voted riveting machine, multi-purpose hydraulic Cold riveting clamp, the wild-type multi-function axle casing tension and compression device, GCD-I-type beam positioning, such as the standard wheel hydraulic±è±.

其主要产品：多功能液压冷铆机、四柱导向压力机、离合器压盘组装机、T8360A/60B(T8366)型制动毂镗床、电动液压制动蹄片投铆机、多功能液压冷铆钳、野外式多功能半轴套管拉压器、GCD-I型光束水准车轮定位仪等液压汽保设备。

Recorded high empty homework organization parts of upper arm liquids to press the design process of the urn in detail in the text, Chien designed slightly the arm liquid press the flexible liquid of the urn and the jack mechanism part to press an urn.

起重部分主要是控制伸缩臂伸缩运动的液压缸，以及控制起重钢丝绳收进放出的液压马达。本文着重高空作业机构的变幅液压缸和回转液压马达设计，简略起重机构。

With the complication and diversification of components, Composite Hydraulic Manifold Block which installed plate valves, lap valves and cartridge valves is the mainstream in the application and development of integrated hydraulic system.

随着液压元件日益复杂化、多元化，复合式液压集成块，即载有板式阀、叠加阀、插装阀等阀体和其它各类附件的液压集成块，已成为目前液压系统发展和应用的主流。

Based on analyzing the problems in the reversing style of the reciprocal feeder for sintering machine,the hydraulic reciprocal feeder with travel prolongation mechanism for developing new sinter is designed by making the best of the characteristics of hydraulic system.

在分析了以往烧结机使用的梭式布料器换向方式存在问题的基础上，充分利用液压系统的特点，设计了一种带增程机构的液压梭式布料器配套于新设计开发的烧结机，并利用液压缸驱动双联绳轮小车实现布料小车增程一倍，缩短了液压缸的行程。

Hydraulic planer the advantages of a smooth drive, theintroduction of hydraulic drive, ram a uniform velocity,and canachieve variable speed; load capacity than the general mechanicaltransmission large Shaper;ram can be in any position toimmediately stop or start;Stage movement to apply the hydraulicdrive,feed rate can be in a certain range without adjustments;Machine done by hydraulic valve protection, are not too easy todamage the machine parts;Part of the oil is not easy to workwear, so long machine life;manipulating simple andconvenient.

液压刨床的优点是传动平稳，由于采用液压传动，滑枕的运动速度均匀，且可实现无级调速；负荷能力比一般机械传动的牛头刨床大；滑枕可以在任何位置上立刻停止或起动；工作台的进给运动也采用液压传动，进给量可以在一定范围内无级调整；机床由液压安全阀做保护，过载时不容易损坏机床的零部件；零件在油里工作不易磨损，因而机床寿命长；操纵简单，使用方便。

The main products are "Jinmao licensing" CBY series of hydraulic manual handling car, COY300 hydraulic drums car, COT350-tilting-oil drums handling car, CTY500-1500 hydraulic loading and unloading trucks, SJY0.3-0.5T Series scissors snorkels platform eight species, more than 40 kinds of product specifications, warehouses, docks, factories, workshops, supermarkets, construction sites, such as the ideal venue removal tool, the use of pollution-free, lightweight, flexible, safe and reliable .

主要产品有&金茂牌&CBY系列手动液压搬运车、COY300型液压圆桶车、COT350型可倾式油桶装卸车、CTY500-1500型液压装卸车、SJY0.3-0.5T系列剪叉液压升降平台等八个品种、四十多种规格的产品，是仓库、码头、工厂、车间、超市、建筑工地等场地的理想搬运工具，使用无污染、轻便、灵活、安全可靠。

In this paper, on the basis of the description of the pile-driving process and the dynamic analysis of the pile and the HSPD, the relationship between the frequency and the pile-driving force has been established under the conditions of the pile strength and the HSDP working requirements. The frequency character of the ZYB200B HSPD system has been analyzed quantitatively in the vibrancy pile-driving process, therefore the frequency range and the best available frequency have been obtained.

本文首先通过对压桩过程的描述和桩与液压静力沉桩机的力学分析，确立了液压振动压桩在桩的强度条件下和液压静力沉桩机工作要求下的压桩频率与压桩力幅值之间的关系；定量分析振动压桩时系统的频率特性，得出了ZYB200B型液压静力沉桩机振动压桩时压桩频率的取值范围和系统能得到的最佳频率值。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。