液压

According to the contamination balance and chain reaction in hydraulic and lubricating system,this paper analyses the shortages of traditional decontaminating mode,puts forward the concept of self-decontaminating gasoline tank and full flux oil circulation filtration technology,and explain the application of it in hydraulic and lubricating system.

介绍了液压润滑系统污染控制的重要性，根据液压润滑系统中的污染平衡与链式反应，分析了液压润滑系统传统污染净化模式的缺点，提出自净化油箱和全流量回油过滤技术的概念，并说明了它在液压润滑系统中的应用。

Thedevelopment development hydraulic jack, the bearing heater, thebearing get up pulling out, the hydraulic pressure spanner, thehydraulic pressure pulls a horse, the hydraulic pressure small crane,nut broken cutting, the oil filter machine and the pipe bendingmachine and so on the advanced practical mechanical and electricalservice product has the world advanced level, the product and thetechnology widely applies to domain the and so on electric power,petrification, chemical industry, metallurgy, mine, spinning andweaving, papermaking machinery service department and the machinemanufacture unit, and in the Daya Bay nuclear power station, BeijingSteel Corporation, Wuhan Steel Corporation, the Baoshan SteelCorporation, the Daqing Oil Field, the victory oil field, the Golmudoil field, the Three Gorges power plant, Yangzi petrifies, Qi and Lupetrifies and so on in the national large and middle scale enterprisesand the project the comprehensive promoted use.

研制开发的液压千斤顶，轴承加热器、轴承起拔器、液压扳手、液压拉马、液压小吊车、螺母破切器，滤油机和弯管机等先进实用的机电维修产品有世界先进水平，产品和技术广泛应用于电力、石化、化工、冶金、矿山、纺织、造纸等领域的机械维修部门和机械制造单位，并在大亚湾核电站、首钢、武钢、宝钢、大庆油田、胜利油田、格尔木油田、三峡电站、扬子石化、齐鲁石化等国家大中型企业和工程中全面推广使用。

On the base of the Tube of hydroforming technology, the hydroforming process of subframe usually consist of the process of tube pre-bending pre-expansion and/or preforming and final hydroforming.

根据目前管材液压成形技术的水平，可以采用管材经过预弯、预液压胀形、终液压胀形等工艺过程，实现副车架本体的液压成形。

This thesis is based on the design of hydraulic propelling which comes from the technology item of the method multitude objects optimizing design and being carried out in die-casting machine'exploitation ,and a software of hydraulic system principle diagram's automatic protracting is carried out by developer with Delphi. The efficiency and quality of drawing hydraulic system principle diagram is improved sharply. And the calculating of hydraulic system's pressure and flux is achieved.

课题以科研项目&多目标优化设计方法及其在压铸机产品开发中的应用&中的液压传动系统设计为依托，利用Delphi编程工具开发出液压系统原理图自动绘制软件，从而极大地提高液压系统原理图的绘制效率和绘图质量，并实现了液压系统管路压力与流量的求解和计算。

This thesis is based on the design of hydraulic propelling which comes from the technology item of the method multitude objects optimizing design and being carried out in die-casting machine"exploitation ,and a software of hydraulic system principle diagram"s automatic protracting is carried out by developer with Delphi. The efficiency and quality of drawing hydraulic system principle diagram is improved sharply. And the calculating of hydraulic systems pressure and flux is achieved.

课题以科研项目&多目标优化设计方法及其在压铸机产品开发中的应用&中的液压传动系统设计为依托，利用Delphi编程工具开发出液压系统原理图自动绘制软件，从而极大地提高液压系统原理图的绘制效率和绘图质量，并实现了液压系统管路压力与流量的求解和计算。

The company mainly produces series CBY pallet trucks, CTY Series forklift loading and unloading, DYD, DSYD500-800 electric, manual hydraulic crane, CDD electric forklift, CDZY forward-type loading and unloading forklift truck, forklift tilting-style drums, GPD fixed balance crane , XYD cantilever cranes, hydraulic lifting platforms more than 20 models of products, may at any time for the user design the special vehicles and hydraulic equipment, one of four series of formal adoption of National Product Quality System Certification.

公司主要生产CBY系列液压搬运车、CTY系列装卸叉车、DYD、DSYD500-800电动、手动液压吊车、CDD电动叉车、CDZY前移式装卸叉车、可倾式油桶叉车、GPD固定平衡吊车、XYD悬臂吊车、液压升降平台等20多个型号的系列产品，可随时为用户设计所需的异型车和液压设备，其中四大系列产品正式通过国家质量体系认证。

First according to the hydraulic pressure elevator system diagram, use the machine design and hydraulic transmission knowledge calculates the diameter of the plunger, cylinder tube wall thickness as well as cylinder bottom thickness; second, through the examination confirmation to the obtained result to complete the work of cylinder design; Simultaneously has carried on the component choice and the computation; Through to the system calorific capacity computation the and the volume of cooling water while the fuel tank cools when needs to complete the hydraulic pressure elevator fuel tank design; Based on the system oil stream condition to calculated the tube internal pressure lose, the local pressure loss as well as the all of the pressure lose to carried on the system checking calculation; Finally through the consult correlation design handbook to calculation and examines the belt, the band pulley, the axis, as well as the key, has completed the hydraulic pressure elevator pumping station transmission system design.

首先根据液压电梯系统原理图，利用机械设计与液压传动等方面的知识计算出柱塞的直径、缸筒的壁厚以及缸底厚度，并对所得结果进行校核验证完成了工作油缸的设计；同时进行了元件的选择和计算；其次，通过系统发热量的计算和油箱冷却时需要的冷却水量的计算完成了液压电梯油箱的设计；依据系统油流状态计算出管内压力损失、局部压力损失以及总压力损失进行了系统的验算；最后通过查阅相关设计手册对带、带轮、轴、以及键进行设计计算和校核，完成了液压电梯的泵站传动系统的设计。

Firstaccording to the hydraulic pressure elevator system diagram, usethe machine design and hydraulic transmission knowledge calculatesthe diameter of the plunger, cylinder tube wall thickness as wellas cylinder bottom thickness; second, through the examinationconfirmation to the obtained result to complete the work ofcylinder design; Simultaneously has carried on the component choiceand the computation; Through to the system calorific capacitycomputation the and the volume of cooling water while the fuel tankcools when needs to complete the hydraulic pressure elevator fueltank design; Based on the system oil stream condition to calculatedthe tube internal pressure lose, the local pressure loss as well asthe all ofthe pressure lose to carried on the system checking calculation;Finally through the consult correlation design handbook tocalculation and examines the belt, the band pulley, the axis, aswell as the key, has completed the hydraulic pressure elevatorpumping station transmission system design.

首先根据液压电梯系统原理图，利用机械设计与液压传动等方面的知识计算出柱塞的直径、缸筒的壁厚以及缸底厚度，并对所得结果进行校核验证完成了工作油缸的设计；同时进行了元件的选择和计算；其次，通过系统发热量的计算和油箱冷却时需要的冷却水量的计算完成了液压电梯油箱的设计；依据系统油流状态计算出管内压力损失、局部压力损失以及总压力损失进行了系统的验算；最后通过查阅相关设计手册对带、带轮、轴、以及键进行设计计算和校核，完成了液压电梯的泵站传动系统的设计。

It can get mechanical energy from motor or internal combustion engine and efficiently changed into pressure energy to drive the hydraulic system work, and shows us that pump plays an important role in the hydraulic engineering.

能将由外接马达或内燃机所输入的机械能，有效率地转换成液压能而带动液压系统并对整个液压系统作功，由此可知帮浦在液压工程中扮演著举足轻重的角色。

Analysis of the main reasons is because of fatigue caused by factors such as the copper support ring was broken and the piston rod in the hydraulic cylinder telescopic frequently, the fracture茬口constantly scraping the inner wall hydraulic cylinder mill will pick缸壁, resulting in injury China, so that the speed of decline in hydraulic cylinder; job with the passage of time, strain and缸壁sealing ring, wear ring injuries are increasing, with China to increase the volume, and finally resulted in a serious decline in the speed of hydraulic cylinders.

分析主要原因是，由于疲劳等因素造成的铜质支撑环断裂，在液压缸活塞杆的频繁伸缩中，断裂茬口不断刮磨液压缸内壁，将缸壁拉毛、拉伤而导致内泄，使液压缸速度下降；随着工作时间的推移，缸壁拉伤和密封环、耐磨环的损伤都不断加重，内泄量加大，最后造成液压缸速度严重下降。

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。