开启压力

首先对二甲醚添加低比例的柴油进行优化并对柴油机供油量、供油提前角和针阀开启压力进行优化匹配，然后对ZS195柴油机燃用二元燃料进行试验研究。

In this paper , the fraction , the cyclic fuel delivery quantities , the injection advance angle and the nozzle opening pressure were studied and optimized in a ZS195 diesel engine .

普通喷油器开启压力测试。

Checking of the opening pressure of injectors .

简述压力释放阀的开启压力和开启时间

Brief Discussion on Open Pressure and Time of Pressure Relief Valve

柴油机用喷油器开启压力降低的原因分析

Analysis of the Cause for Pressure Decreasing of Diesel Engine Fuel Injector

热水供暖系统安全阀开启压力的确定

Determination of Open Pressure of Safety Valve in Hot Water Heating System

喷油泵出油阀开启压力对供油特性的影响

The Affect of Pumping Element Delivery Valve 's Open Pressure on the Fuel Delivery Characteristic

出油阀弹簧刚度及开启压力对柴油机喷油系统中汽泡影响的研究

Effects of Delivery Valve Spring Rigidity and Opening Pressure on Bubbles in Diesel Fuel Injection System

最后，在分析上述测量结果的基础上，建立了一种判别喷油开启压力大小的方法。

Finally , on the basis of analysing above-mentioned measured results , a method of distinguishing nozzle opening pressure change is set up .

计算研究和模拟试验表明，保压过程中蓄能器的开启压力略高于蓄能器充气压力；

Simulation research and practical experiments showed that : during pressure-retaining process , accumulator opening pressure is a little greater than precharge pressure ;

试验结果表明：开关阀样机开启压力小，启闭迅速，在公称压力下实现了零泄漏，满足设计要求。

The test results reveal that the valve sample has low open pressure , good on-off performance , zero leakage , and so the design requirements are satisfied well .

在一定的范围内，热流密度和充装度的增大会使液化气储罐内压力上升速度加快，缩短了达到安全阀开启压力的时间

In a certain range , the pressure in the tank rises faster as the heat flux and filling level increases So , the time when the safety valve is opened is shortened

同时，可以利用调整阀瓣的自重、弹簧的弹力以及阀瓣的底孔大小来确定阀门的开启压力和启闭时间。

Meanwhile , the flap valve can be used to adjust weight , spring tension and the bottom outlet valve flap valve opening size to determine the pressure and open and close time .

为正确设置储罐安全阀的开启压力和排放压力，必须根据储罐的最高工作压力按照规范正确确定储罐的设计压力；

To set the cracking pressure and the discharge pressure of the safety valves correctly , the design pressure of tanks should be determined by the specification according to the maximum working pressure ;

针对1130单缸柴油机研究了喷油嘴油线分布、喷油嘴孔数和喷油嘴针阀开启压力对分层燃烧甲醇发动机性能的影响。

The effects of fuel spray distribution of injection nozzle , number of nozzle holes and opening pressure of nozzle needle valve on the performance of stratified combustion methanol engine were studied on a 1130 single cylinder diesel engine .

通过分析往复式油气混输泵工作原理，结合组合阀排出阀芯开启压力平衡方程和油气两相绝热内压缩过程方程，推导出了输入功率的理论公式。

Through analysis of working principle for reciprocating oil-gas multiphase pump , combined with the balance equation of opening pressure for combination valve and adiabatic internal compression process for gas-liquid mixture , the calculation formula of input power is deduced .

为了精确控制电控单体泵的喷油过程，结合嘴端压力变化规律，对影响喷射过程的电磁阀响应时间、喷油器开启压力等进行了分析。

Nozzle pressure variations during the mold injection process and the main factors affecting the injection process such as the solenoid response lag and the injector opening pressure were studied to develop a method to precisely control unit pump injection rates .

合理地匹配控制油道和喷孔面积、针阀升程和开启压力以及增压比等参数，可以进一步扩大系统的可控范围，为喷油性能的优化提供更好的前提条件

After compromising control line section , injection hole section , nozzle lift , opening pressure of injector and intensified ratio , the controllable degree of injection parameters , that are the precondition for optimization of injection performance , can be further improved

受现今地应力等因素的影响，上述4组裂缝在井口的开启压力分别为15.1,19.6,27.8和28.0MPa，反映了不同方位裂缝在油田注水开发过程中的开启序列。

Fractures have little reservoir capacity but make main roles on seepage . Affected by foctors such as present stress field , the starting pressures of above fractures on the wellhead respectively are 15.1,19.6,27.8 and 28.0 MPa , which show the different starting sequence of the fractures .

通过对石化企业典型装置安全阀运行状况和校验时状况的调查，以及校验时安全阀开启压力的试验研究，得出石化企业安全阀失效模式和失效原因。

The models and the reasons of safety valve lapse are expressed , based on the investigation in petrochemical engineering enterprise typical device safety valve work status and safty valve status during safty valve inspection , and based on safty valve set pressure test during safty valve inspection .

安全阀应有在正常状态下良好的密封性能，而在开启释放压力之后其密封性能也应该保持不变。

PRVs should have good sealing performance in the normal state , but also should keep it after multi-impacts .

封闭层的间歇开启构成异常压力环境下油气运移的主通道。

Opening of seal beds constitutes main pathways of hydrocarbon from abnormally pressured system .

应用数值计算方法建立了泵阀运动规律的仿真模型，通过仿真计算，可以直观地了解泵阀开启时的压力波动，解释产生奇点的原因。

The simulation model for the motion law of the pump valve is established by means of numerical calculation . By simulation calculation , the pressure fluctuation in opening the valve can be known , therefore the reason for the singular point of the model can be explained .

如果油箱内压力过高，则压力阀开启，以降低压力。

If the pressure builds up excessively , the pressure valve opens to relieve the pressure .

先开启旁通阀平衡压力，再开阀，后开启水轮机。

First opens the by-pass valve counter-pressure , then operates the valve , latter opens the hydraulic turbine .

根据注水压力的变化，研究了裂缝的开启过程及开启压力；

According to the change of water injection pressure , it studies the opening process and opening pressure of fractures .

此开关能在井内压力小于油层压力时开启，大于油层压力时关闭。

The switch can be opened or closed when the well pressure is lower or higher than the reservoir pressure respectively .

对于由于实验室门的开启所造成的压力梯度的突变，采取了风量转移的措施。

The system has taken the method of air flow rate shifting to deal with pressure gradient sudden change , which is caused by laboratory gate opening .