查询词典 valve control

For the aim of saving energy and optimizing control of chilled systems, the performance of VWV systems and characteristics of control systems were analyzed based on the simulation. According to the characteristic of the monitored parameters and controlled variables in VWV systems, three online optimal control strategies were proposed and validated:(1) Optimal strategy for on/off control of chillers according to the ratio of secondary flow rate to primary flow rate.(2) Optimal strategy for the control of secondary pump according to value positions of auto-controlled AHU vales. And (3) Optimal strategy for supply chilled water temperature control of chillers according to valve positions of auto-controlled AHU valves and working status of secondary pump.

为达到节能和优化系统控制的目的，在楼宇空调水系统及其局部控制仿真分析的基础上，针对变流量系统监测点和可调参数较多的特点，提出并验证了3个实时优化控制方案：根据初级和二级冷谋水流量的比率，实时优化多台冷水机组的启／停控制；利用AHU自动控制水阀的阀位信息，实时优化二级水泵的控制；利用AHU自动控制水阀的阀位信息以及二级泵的工作状况，实时优化冷水机组出水温度的控制。

Electric control valve for variable displacement is a novel control component in automotive air conditioners, which turns mechanic capacity control into electric control. It can use optimal algorithms to control capacity, and has interface with automotive systematic control unit. It has fantastic foreground.

变排量压缩机电动控制阀是目前在轿车空调系统中出现的一种新型容量控制元件，它完成了容量控制由机械式调节到电动控制的转化，不仅能够采用优化控制算法实现制冷系统的多元控制，而且为轿车整车系统控制提供了接口，市场前景很好。

Applied to the control valve angle stroke main valve, butterfly valve and so on.

应用于角行程控制的阀门主要有球阀、蝶阀等。

Close discharge valve, the need to open and close with the Coma Berenices two pieces formed between the sealing suce sealing certain specific pressure, while also overcoming the stem and the packing between the stem and the nut thread between the stem end Department and other friction parts bearing friction, and must exert a certain degree of closing force and closing moments, PUMP CONTROL VALVE EN700X the valve in the open and close the process, the required hoisting hoisting force and torque is the change, Its maximum is in the closed or open end of the initial transient instantaneous.

关闭放料阀门时，需要使启闭件与发座两密封面间形成一定的密封比压，同时还要克服阀杆与填料之间、阀杆与螺母的螺纹之间、阀杆端部支承处及其他磨擦部位的摩擦力，因而必须施加一定的关闭力和关闭力矩，阀门在启闭过程中，所需要的启闭力和启闭力矩是变化的，其最大值是在关闭的最终瞬时或开启的最初瞬时。

Second, Duckbill valve Water Pump Control Valves pros and cons: 1 advantages: Duckbill valve, low cost, such as the use of appropriate rubber material than metal valve service life, easy installation, installation of flexible and diversified ways to repair.

二、鸭嘴阀的优缺点： 1、优点：鸭嘴阀成本低，如采用合适橡胶原料使用寿命超过金属止回阀，安装方便，安装方式灵活多样，可修补。

The TDV combines the functions of a positive hand-tight shutoff valve, check valve, and flow control valve into one versatile package, and eliminates the need to utilize three separate valves on the pump system.

系列TDV将绝对手动紧密关闭阀、止回阀和流量控制阀的功能组和在一个多功能的装置内，不需要在泵系统中采用三个独立的阀门。

Valve plate and valve seat sealing surface for the oblique cone structure, oblique cone surface in the valve plate welding temperature, corrosion resistant Water Control valves alloy materials; fixed in the regulation of the spring between the ring plate and the plate with the adjusting screw assembly structure.

阀板与阀座的密封面为斜圆锥结构，在阀板斜圆锥表面堆焊耐温、耐蚀合金材料；固定在调节环压板之间的弹簧与低温阀门压板上调节螺栓装配一起的结构。

Can be added valve positioner to achieve valve position monitoring and feedback to enhance control valve performance.

可添加阀门定位器，实现阀位检测和反馈，提高控制阀性能。

Pressure control valve with pressure reducing valve, safety valve and the sequence of three kinds of valves.

压力控制阀有减压阀、安全阀和顺序阀三种。

This paper consider centrifugal force and coriolis force for ideas of Planetary LabCD Valve Model and Single Point Fluid Separation Model, then the relation of critical rotation speed and planetary angle is linear which control parameter of critical rotation speeding in the Planetary LabCD Valve Model and compare with James Lee theory, and define γR in SPFS Valve Model to show the relation of the low rotation speed is linear and is fixed where the high rotation speed for utilizes any rotation speed.

本论文考虑离心力与科氏力之影响，且提出行星式碟片阀门模式与单点流体分离阀门模式两模式，其中行星式碟片阀门模式，其临界转速与行星角之大小近於线性变化，可当於控制阀门之临界转速之设计参数，且比较在阀门设计上考虑行星角来控制阀门临界转速与James Lee之阀门临界转速理论可以得知，从吾人所提出行星式碟片阀门模式可以得到与实验结果相同的趋势。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。