differential pump

Oil-water two-phase flow measurement based on differential pressure;

基于差压法的油水两相流的流量测量

Improvement of differential pressure liquid level measurement in thermal power plant;

火电厂差压式液位测量的改进

There are the functional relations among the flow parameters of air in the air reverse circulation drilling piplie, including volume of flow, velocity of flow, pressure and pressure difference which have a great effect on carrying solid phase.

反循环钻探管路中空气的运动参数包括流量、流速、压力、差压，相互间存在一定的函数关系，这些参数对携带固相有很大影响。

For the problem that on-line monitoring of primary air of direct firing pulverizing system can t be complete achieved, the chaotic properties of parameter change of two-phase flow in pipe is analyzed in the paper, according to the pressure difference signal of two-phase flow system.

目前电站锅炉直吹式制粉系统的一次风气固两相流流动状态在线监测仍未得以实现，针对这一难题，本文首次基于管道内气固两相流差压信号对其流动状态变化的混沌特性进行理论研究。

The effect of counter-pressure casting parameters on secondary dendrite arm spacing (SDAS)of A357 alloy was studied.

研究了差压铸造不同工艺参数对A357合金二次枝晶间距的影响。

The theory of counter-pressure casting together with its advantages is discussed in this paper.

论述了差压铸造的原理特点,回顾了差压铸造过程控制系统的发展,分析了差压铸造技术的国内发展现状,介绍了作者新近开发的真空调压铸造过程控制系统,最后指出了差压铸造技术的发展趋势。

The effect of counter-pressure casting parameters on secondary dendrite arm spacing of A357 alloy under different technology was studied.

研究了不同工艺条件下,差压铸造不同工艺参数对A357合金二次枝晶间距的影响。

Analysis of differential pressure signal based on wavelet transform and higher-order statistics;

基于高阶统计量和小波变换的差压信号分析

EMD is applied to the differential pressure signal of two-phase flow to obtain frequency components with different scales, and the normalized energy of the component is extracted as the feature of flow pattern identification.

应用EMD将差压信号分解成不同频率尺度上的单组分之和,并提取组分的归一化能量作为流型辨识特征量。

Because the differential pressure signal of oil-gas two-phase flow was a typical non-stationary and multi-component signal,EMD was first applied to break up it into Intrinsic Mode Functions(IMFs) which can be divided into three frequency bands such as high-band(30~50 Hz),mid-band(5~30Hz) and low-band(0~5 Hz).

油气两相流差压信号是一典型的非平稳多组分信号,经验模态分解首先将差压信号分解成9阶本征模函数,按照频率范围可以划分为3个子带:高频带(30~50 Hz),中频带(5~30 Hz)和低频带(0~5 Hz)。

The Parameters Choice for Casting Process Design in Low Pressure Casting and Counter Pressure Casting;

低压及差压铸造工艺设计的参数选择

Counter gravity casting equipments(CGCE),such as low pressure casting(LPC),counter pressure casting(CPC)and adjusted pressure casting(APC)equipments,have been extensive used in practice.

低压铸造、差压铸造及调压铸造等反重力铸造装备技术已在实际生产中得到广泛应用,但多数此类设备功能单一,无法在同一台设备上实现多种功能。

The study and application of counter pressure casting were introduced in China these years.

介绍了近几十年来差压铸造技术在中国的研究进展和生产应用情况,指出差压铸造在生产大型复杂薄壁铝合金铸件方面的优势。

Die forging process analysis of the differential gauge;

差压计模锻成形工艺方案分析

The main function of blowing-through steam is to reduce the syphon differential pressure of single-support rotary syphon.

介绍了单支撑旋转虹吸器的使用条件和工作原理,吹除蒸汽对单支撑旋转虹吸器的主要作用是降低虹吸差压,同时阐明了单支撑旋转虹吸器的虹吸差压和吹除蒸汽之间的关系。