查询词典 surge pressure

"Hydraulic safety valve" is widely used in hydraulic power systems and hydraulic equipment of safety devices, pressure devices can be limited, is a special valve, which is different from the conventional valve, the traditional use of mechanical valves metal spring as a driving force, can only be limited to low pressure, encountered more BALANCING VALVES than 10Mpa pressure limit pressure can do to increase the volume of pressurized design, the traditional role of the high-pressure valves and high pressure hydraulic power systems and hydraulic equipment The limit pressure of necessity is bulky and complicated structure, difficult to manufacture large, high production costs; in the course of the fatigue of metal spring parameters change fluctuating pressure limiting Ambassador to regular revision to ensure the normal use.

&气动液压安全阀&是目前广泛应用于液压动力系统和液压设备中的安全装置，也可以作限压装置，是一种特殊的阀门，它不同于传统的阀门，传统阀门用机械金属弹簧为动力，只能限中低压力，遇到超过10Mpa以上的压力限压，闸阀只能做加大体积的增压设计，因此传统阀门作用于高压和超高压的液压动力系统和液压设备的限压时必然体积笨重，结构复杂，制造难度大，产品成本高；在使用过程中金属弹簧的疲劳变化大使限压参数波动大，要经常调整才能保证正常使用。

"Hydraulic safety valve" is now widely used in hydraulic power systems and hydraulic equipment in the safety device could also serve as limited pressure device, is a special valve, unlike conventional valves, conventional valves with mechanical metal spring as a driving force, can only be limited to low pressure, the pressure encountered over more than 10Mpa limit pressure can do to increase the volume of the Safety Overflow Valve booster design, the traditional role of the high-pressure valves and high pressure hydraulic power systems and hydraulic equipment The limit pressure of necessity is bulky and complicated structure, difficult to manufacture large, high production costs; in the course of the fatigue of metal spring parameters change fluctuating pressure limiting Ambassador to regular revision to ensure the normal use.

&气动液压安全阀&是目前广泛应用于液压动力系统和液压设备中的安全装置，也可以作限压装置，是一种特殊的阀门，它不同于传统的阀门，传统阀门用机械金属弹簧为动力，只能限中低压力，遇到超过10Mpa以上的压力限压，只能做加大体积的增压设计，因此传统阀门作用于高压和超高压的液压动力系统和液压设备的限压时必然体积笨重，结构复杂，制造难度大，产品成本高；在使用过程中金属弹簧的疲劳变化大使限压参数波动大，要经常调整才能保证正常使用。

Measurirg indxes included:(1) Electrocardiograh;(2) Hemodynamics: cardiac output, pump output, aortic pressire, pulmo nary artery pressure, left atrium pressure, right atrium pressure, left ventricular end systolic pressure, left ventricular end diastolic pressure, LV-dp/dt, right ventricul ar end systolic pressure, RV-dp/dt, systolic pressure time index, diastolic pressure time index, endocardial viability ratio;(3) Myocardial metabolism: coronory sinus blood flow, myocardial oxygen consumption, myocardial lactate extractiorn;(4) Ischemic myocardial area;(5) Ultrastructure of myocardium.

测量指标包括：①心电图；②血流动力学：心输出量、泵输出量、主动脉压、肺动脉压、左房压、右房压、左室收缩末压、左室舒张末压、左室压的一阶导数、右室收缩末压、右室压的一阶导数、收缩压力时间指标、舒张压力时间指标、心内膜下心肌供血比率；③心肌代谢；冠状窦血流量、心肌氧耗量、心肌乳酸摄取量；④心肌缺血面积检查及缺血心肌的超微结构观察。

Due to the influence factors including geological conditions, the pressure of water curtain, air pressure in surge chamber and properties of rock masses and so on are taken into account, the water-air two-phase flow model proposed in this paper may provide a new idea for the design and remediation of the air-cushioned surge chamber.

由于水-气二相流模型可以充分考虑调压室地质条件，水幕的压力，气室气压及围岩性质等因素的影响，为空气损失评估、水幕设计及对漏气严重的调压室进行修补提供了新的研究思路。

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。

For preventing the pressure surge occurred when the pump stops in long conduit system, measures of installing air inlet and relief valves to prevent pressure surge are presented.

对长管道系统停泵产生的压力涌浪提出了装设进排气阀的防护措施，建立了进排气阀的特征线方程，并对特征线方程的求解进行了讨论，将这种防护措施用于某供水泵站，从计算结果来看进排气阀较好地抑制了液柱分离的产生，有效地控制了系统中的压力骤增。

Ning Boheng tells limited company of hydraulic pressure motor is the professional production company that the design makes equipment of system of actuating device of gyrator of winch of motor of hydraulic pressure of type of incurvate line motor, crankshaft, hydraulic pressure, hydraulic pressure, quiet hydraulic pressure, of all kinds hydraulic pressure and hydraulic pressure.

宁波恒通液压马达有限公司是设计制造内曲线马达、曲轴式液压马达、液压绞车、液压回转器、静液压驱动装置、各类液压系统及液压设备的专业制造公司。

The study shows that the pressure transient curve of fractured wells in closed circular formation can be divided into six different flow regimes. In condition of the same fracture opening width and fracture length, compared to rectangular fracture, the pressure drop with tapered fracture is bigger, and the dimensionless pressure and pressure derivative curves are higher. In condition of the same fracture opening permeability, compared to linear declining and constant conductivity fractures, the pressure drop with exponential declining conductivity fracture is the biggest, and the dimensionless pressure and pressure derivative curves are the highest.

研究结果表明：圆形封闭地层压裂井的压力动态曲线可以划分为6个流动阶段；在相同裂缝开口宽度和相同裂缝长度的条件下，与矩形裂缝相比，楔形裂缝压力消耗大，表现为无因次压力及压力导数曲线越高；在相同裂缝开口渗透率的条件下，与导流能力呈线性降低的裂缝以及常导流能力裂缝相比，导流能力呈幂指数降低的裂缝压力消耗最大，表现为无因次压力及压力导数曲线最高。

One of the following conditions for the second pressure vessel: in the pressure vessel; low-pressure container (only for the extreme toxicity of the medium and highly hazardous); low pressure reaction vessel and the low pressure storage container (only the degree of flammable or toxic medium degree of harm); low pressure shell and tube heat recovery boiler; low glass-lined pressure vessel.

2下列情况之一为第二类压力容器：中压容器；低压容器(仅限毒性程度为极度和高度危害介质)；低压反应容器和低压储存容器(仅限易燃或毒性程度为中度危害介质)；低压管壳式余热锅炉；低压搪玻璃压力容器。

Hemodynamic parameters including heart rate, cardiac output, systolic blood pressure, diastolic blood pressure, mean arterial pressure, central venous pressure,right ventricular end-diastolic pressure,left atrial pressure, and left ventricular end-diastolic pressure were monitored and recorded at 5, 60 and 180 min after cardiac resuscitation with PUCA pump.

结果无辅助、延迟辅助和即时辅助复苏持续时间分别为(38.3±5.8) min、(43.5±9.2) min和(48.7±23.8) min，3组比较差异无显著性(P＞0.05)；3组成败比分别为0/3、0/2和5/1，差异有显著性(P＜0.05)。

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