查询词典 motion valve

By means of the K-ε turbulence model and finite element method, the flow of the fluid in the valve and the piston during a cycle of pumping is simulated and calculated. The motion law of the crude oil in the valve passage and concentric annulus in the upstroke and downstroke is analyzed.

针对杆式泵泵简内的流体流动问题，采用湍流模型的K-ε两方程模型和有限元方法，对在一个抽油循环中阀与活塞在几个特定的位置的流体流动进行了建模与计算，具体分析了处于阀道内和同心环状空间中的原油在上下冲程的运动规律。

When the hand wheel rotation, driving the plunger in the hole through the stem up and down reciprocating motion of the middle frame to complete the valve opening and Two Piece Trunnion Ball Valve closing function.

当手轮旋转，通过阀杆带动柱塞在孔架中间上下往复运动来完成阀门的开启与关闭功能。

This article introduced the manipulator, it outputs four groups by PLC to actuate the abscissa axis, the z-axis, the chassis rotation, hand-rotating motor separately, and controls the manipulator abscissa axis and the z-axis pint pointing, the micro switch bequeaths the position signal to the PLC main engine; The electrical machinery drives the hand fingernail and the chassis revolve; The solenoid valve controls air valve the switch to control the manipulator hand fingernail to gather, then realizes the manipulator proper motion function.

本文介绍的机械手是由PLC输出四路来分别驱动横轴、竖轴、底盘转动、手转动电机，控制机械手横轴和竖轴的精确定位，微动开关将位置信号传给PLC主机；电机拖动手爪和底盘旋转；电磁阀控制气阀的开关来控制机械手手爪的张合，从而实现机械手精确运动的功能。

This paper determines the motion of lower rocker arm in valve gear by the dimension of cam mechanism and derives the characteristics of equivalent cam,assuming that the rocker arm ratio varies according to the camshaft angular displacement while the push rod and both the upper and lower rocker arms are in motion.

本文根据凸轮机构的几何尺寸确定配气机构下摇臂的运动，并且考虑上下摇臂及推杆的运动，将摇臂比看作是随凸轮转角变化的变量，从而导出当量凸轮的运动规律。

Through the analysis of different cross section flow field in cylinder of two-valve and four-valve diesel engine, the following conclusion can be obtained: The formation of intake swirl of two-valve diesel engine mainly is effected by an intense air flow ring zone near the radius from valve axis to cylinder axis, as the flow progresses down through the cylinder, the ring zone air flow expends to both side and finally forms an unified rigid rotating swirl motion.

2号缸盖的螺旋进气道产生的绕自身气门轴线的动量矩比1号缸盖的大，且切向气道的径向速度在前峰面上的数值比1号缸盖的速度数值大很多，因此，两进气道组合后的动量矩损失也大，所以虽然2号缸盖的两个进气道单独的涡流比都高于1号缸盖的两个进气道，但组合后的合成涡流比却是基本相同的。

Along with the stem of the gate valve for linear motion, and called the lift rod valve gate valve is also called the next shot.

闸阀的闸板随阀杆一起作直线运动的，叫升降杆闸阀亦叫明杆闸阀。

In order to optimize the spring of the reciprocating pump valve and establish the best spring factor matching, the unsteady opening-closing process of the poppet valve was simulated. The simulation based on computational fluid dynamics approach, and the dynamic-grid technology and User Defined Function was conducted to depict the law of motion of the poppet valve.

采用RNG k-ε湍流模型、动网格技术以及用户自定义程序，对往复泵泵阀的启闭过程进行了非定常数值仿真，得出了不同弹簧因素下、阀门从开启到关闭的过程中，阀芯的升程随时间的变化规律、阀的迟滞关闭时间以及阀芯落座的瞬时速度。

A motion tracking model based on the Mumford-Shah segmentation model and a parameter estimation method based on the level set value is proposed to track the motion of the heart mitral valve and estimate its motion parameter.

5提出了基于M-S模型的运动目标检测方法和一种基于水平集函数值的参数估计方法，并应用于心脏超声图像二尖瓣膜的运动检测。

This impulsion tool uses a high speed on-off valve to control to-and-fro motion of the distributing oil valve core, which impels the cylinder rod to-and-fro motion to form impulsion.

此冲击器采用高速开关阀控制配油阀的阀芯往复运动，从而促使活塞杆往复运动形成冲击的工作方案。

A new valve design is proposed by shortening stroke distance of the valve,altering motion condition im magnetic field and picking a magnetic saturated alloyof iron and nickel as the material for the valve.

经缩短阀片行程距离，改变其在磁场中运动状态，并选用IJ50较高磁饱和铁镍软磁合金为阀片材料试验。

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。