查询词典 valve box

Use of smart valve positioner not only can easily change the flow characteristics of control valve control system can also improve the quality of control.

采用智能阀门定位器不仅可方便地改变控制阀的流量特性也可提高控制系统的控制品质。

When the control valve and valve positioner assembly combination, their positioning resolution How?

11当调节阀与阀门定位器装配组合后，它们的定位分辨率如何？

The power-driven valve: power-driven valve can be used to drive a variety of power sources.

动力驱动阀：动力驱动阀可以利用各种动力源进行驱动。

One valve is the pressure-relief valve, which prevents pressure in the tank from rising too high.

一个是减压阀，以防止油箱中的压力过高。

Including setting up system platform and measuring structure of the rigidity of pretension spring of the solenoid valve, designing the dynamic electric-current driver on the basis of power sink principal, variable pulse width modulation of voltage boosting and inversion technology, realizing the intelligence controlover the control parameters, satisfying the diversity requirement towards the dynamic feature experiment of the solenoid valve; furthermore, testing system software is developed, and filtering is conducted over the signals of armature displacement response and driving current educed from the experiment using wavelet analysis technology.

构建了系统台架和电磁阀预紧弹簧刚度测量机构，设计了基于功率吸收原理和可变脉宽升压逆变技术的电磁阀动态电流驱动器，实现了对驱动器参数的智能控制，满足了对电磁阀动态特性试验的多样性要求。开发了测试系统软件，提出了基于小波分析的方法，对试验所得衔铁位移响应信号和驱动电流信号进行了滤波。

This paper introduces the development and principle, and present study situation of electrohydraulic proportional control system, and the work principle and every component of electrohydraulic proportional valve-controlled motor system of test platform are analyzed in detail, establishing the mathematics model of the valve-controlled motor system.

本文介绍了电液比例控制系统的发展、原理及目前的研究现状，对试验台的电液比例阀控马达速度控制系统的工作原理及各组成部件进行了详细的分析介绍，建立了阀控马达速度控制系统的数学模型。

In the system of the proportional technique of the electric-hydraulics, the proportional valve is an impossible component in the system of the proportional control, and the performance of the electric-machine conversion-component will affect the performance of the entire valve. So, the conversion-component used in the electric-machine plays an important role in the wholly system.

在电液比例控制系统中，比例阀是构成比例控制系统不可缺少的元件，而电—机转换元件的性能又会影响整个阀的性能，因此电—机转换元件的性能对整个系统的性能起着至关重要的作用。

As an important component of electro-hydraulic proportional control system, the electro-hydraulic proportional valve controller is a device that providing a specific current to proportional valve, so that the flow or pressure of the liquid under continuously control in proportion to it.

电液比例阀控制器作为电液比例控制系统的重要组成单元，其功能是对比例阀提供特定性能的电流，使比例阀控制的液体流量或压力连续成比例地受到控制。

Rotary control valves used in the main ball valve, butterfly valve REDUCING VALVES and so on.

应用于角行程控制的阀门主要有球阀、蝶阀等。

In case that the pressure gauge of the above valve indicates other position than zero, the pressure reducing valve (35) is not good.

在上面的阀的压力表都指示大于零的情况下，减压阀35不良。

The United Kingdom has pledged to provide technical assistance to the peacekeeping effort in Darfur, including airlifting supplies and equipment to assist the African peacekeepers.

英国承诺为达佛的維和努力提供技术帮助，包括提供非洲的維和部队空运补給和裝备。

Results: The level of ET-1mRNA in placental villus was significantly higher in pre-eclamptic women than that in control group.

结果：妊高征组患者胎盘绒毛组织ET-1 mRNA的表达较正常妊娠组明显增高。