查询词典 hydraulic pressure

A low pressure accumulator accumulator nitrogen standard atmospheric pressure of the 7MP. Its main role is to set up a pre-press to ensure that the fuel tank valve 13 to hydraulic cylinders in the main action, and to ensure that reversing valve and main valve between the rapidly reversing.

蓄能器氮气压力不足蓄能器的标准气压为7MP。，其主要作用是建立一个预压，以保证闸阀油缸13先于主液压缸动作，并保证闸阀换向间和主换向阀迅速换向。

According to different purposes, NH Kneader can be made of vacuum, pressure, atmospheric pressure three; temperature tune the form of the use of jacket, steam, conducting oil heating, water cooling, etc.; material means there is hydraulic, double-cylinder for dumping, Ball material, such as screw extruder.

根据不同的使用目的，NH捏合机可制成真空、压力、常压三种；温调形式采用夹套，蒸汽、导热油加热，水冷却等方法；出料方式有液压、翻缸倾倒、球阀出料、螺杆挤压等。

For a long time, our company has specialized in manufacturing diesel valve spring, high-pressure pump, pneumatic hydraulic element spring, pressure regulating spring, delivery valve spring, plunger spring, clutch spring 、 suspension spring 、 die spring 、 disk spring 、 tension spring 、 wire form spring 、 torsion spring etc. for all kinds of motors, motorcycles, tractors and engineering machines.

本公司长期专业生产各类汽车、摩托车、拖拉机及工程机械等配套用内燃机气门弹簧、高压油泵和气动液压元件弹簧、调压弹簧、出油阀弹簧、柱塞弹簧、离合器弹簧、悬架弹簧/减振器弹簧、模具强力弹簧、涡卷弹簧、重型机械用弹簧、碟形弹簧以及拉簧、扭簧、卡簧等，钢丝线径为0.1-75.0mm。

As the complete characteristic curves of reversible pump turbine are often used to calculate the instantaneous parameters, this paper studies the characteristic curve and the wicket closure and opening law in pumped storage plants.Chapter 1 presents the importance and the necessity of this study and reviews the previous related research on hydraulic transient process and valve regulation in pumped storage plants.Chapter 2 analyzes the six collected characteristic curves of reversible pumped turbine and studies their diversification from the point of view of specific speed. The six collected discharge and moment curves with maximum efficiency have been fitted to piecewise continuous curves. This curve-fitting procedure is listed.Chapter 3 takes Liyang Pumped storage plant as an example and analyzes the effect of different characteristic curves on regulation guarantee parameters and the variety of its trochoid during the same operation status.Chapter 4 takes three pumped storage plants with different heads as examples and studies the characteristic of coordinated closure with wicket gate and ball valve and its effect on dynamic pressure in the spiral case, inlet pressure in the draft tube and the rise of rotating speed.Chapter 5 summarizes this paper and point out what should be done in the future research.

由于在过渡过程分析计算中，需要频繁利用可逆式机组的全特性曲线推求机组的瞬时参数，所以本文就特性曲线及关闭规律问题进行了研究，其主要内容如下：第1章，指出本文研究的意义和目的，回顾前人对水力过渡过程、抽水蓄能电站及阀调节的研究成果，在此基础上提出本文的研究内容；第2章，针对收集到的六套特性曲线，从比转速的角度出发来研究可逆式机组特性曲线的变化规律；并对六套曲线的最高效率流量和力矩曲线进行分段拟合，得到各分段函数的具体形式，再通过举例说明最高效率曲线的拟合步骤；第3章，以溧阳抽水蓄能电站为实例，分析讨论不同比转速特性曲线对调保参数造成的影响及对于相同工况其轨迹线的变化；第4章，结合高、中、低三水头段抽水蓄能电站，在导叶直线关闭的基础上，研究导叶与球阀协联关闭规律的特点及对蜗壳动水压力、尾水管进口压力及转速上升造成的影响；第5章，总结全文，提出今后研究的重点和方向。

Techniques of anchor static pressure pile, high pressure hydraulic holing method were employed in this engineering, and good results were obtained.

在纠偏工程设计中，综合运用的增加基础梁、锚杆静压桩、湿掏成孔方法等方法，达到了良好的纠偏效果。

Beijing Municipal Institute of Hydraulic Engineering Planning Design and Research,Beijing 100044,ChinaAbstract:Daning Surge Tank,the surge structure of the Channel of the South-to-North Water TransferProject,connects the PCCP pressure pipe on upper course,and the water delivery underdrain on lower course with the function of adjusting the pressure and the flow rate of water delivery and the function of recession,which is important to the security of the project and the water delivery.

大宁调压池是南水北调中线工程北京段总干渠上的调压建筑物，上游连接PCCP压力管道，下游连接钢筋混凝土低压输水暗涵，具有调节供水压力、供水流量和退水功能，对保证工程安全和供水安全具有重要作用。

The company mainly produces chemical process pumps, high pressure reciprocating pump, piston metering pumps, hydraulic diaphragm metering pumps, mechanical diaphragm metering pumps, gear pumps, meshing, the meshing gear pumps, small flow pump, single screw pump, double-headed Screw pump, three screw pump, shielding pump, magnetic pumps, liquid pumps, boiler feed water pump, steam reciprocating pump, fluorine plastic pump, slurry pumps, water treatment and medicine, environmental protection equipment, industrial pumps accessories, annex Buffer, back-pressure valve, filter, check valves, safety valves, instrumentation, and other on-line

公司主要生产化工流程泵、往复式高压泵、柱塞计量泵、液压隔膜计量泵、机械隔膜计量泵、内啮合齿轮泵、外啮合齿轮泵、小流量离心泵、单螺杆泵、双头螺杆泵、三头螺杆泵、屏蔽泵、磁力泵、液下泵、锅炉给水泵、蒸汽往复泵、氟塑料泵、渣浆泵、水处理加药系统、环保设备、工业泵配件、附件缓冲器、背压阀、过滤器、止回阀、安全阀、在线检测仪表等

Used the finite element method computation pipe network resistance thus obtains the ballast water system the line pressure distributed situation. The paper also has carried on the computation to the ballast tank hydraulic loss and has provided the theory basis to the ballast pump optimized design. The overpressure to the ballast tank has been carried on the discussion. The paper also gets the function between the rated flow and the rated pressure of the pump on ships whose BW pipe net is uniform and line is different, which provides a new method for the selection of BW pump.

文章重点讨论了船舶压载水系统的水力计算，使用有限元法计算管网阻力从而得到压载水系统的管路压力分布情况；文章还对压载舱的水力损失进行计算，对压载水泵的优化设计提供了理论依据；文章还对压载水舱过压问题进行讨论；文章对压载水系统相同而航线不同的船舶，利用最小二乘法得到其压载水泵额定流量和额定压头之间的函数关系，为压载水泵的设计和选型提供了新的方法。

Is a professional in the health-level non-pressure vessel, chemical pressure tank, reactor, agitator tank, hydraulic lifting platform, heat exchanger, evaporator ,Carbon quartz sand filters, bag filters, cartridge filters, nanofiltration filters and the non-standard equipment design and development, manufacturing and service businesses.

广东省江门市江海区英杰特机械设备有限公司是广州英纳集团成员企业，是一家专业从事卫生级常压容器、化工常压容器、反应罐、反应釜、液压升降平台、换热器、蒸发器、活性炭石英砂过滤器、袋式过滤器、滤芯过滤器、纳滤膜过滤器及非标机器的设计与开发、生产及服务的企业。

A hydraulic self-sealed swab bing wellhead assembly with anticollision crown;2. An economical and safe casing swab bing tool;3. If sand is not sunk, by operation of swab to build a different pressure between up and down of sunk sand to form a de- terminate pressure stir makes the sand to sink to reach the objective of unstuck.

冲管解卡工艺是将小直径的管柱下入到油管中，在油管中建立液流的循环通道，利用该通道把砂子带到地面，一直冲洗到人工井底，给油管外的砂子下沉留有一定的口袋；若砂子不下沉，可以通过抽汲在沉砂上下建立压差，形成一定的压力激动，使砂子下沉，达到油管解卡的目的。

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。