基于PLC和组态王的油库收发油控制系统

油库是储存和供应石油产品的专业性仓库,是协调原油生产和加工、成品油运输及供应的纽带.油库收发油系统的自动化程度是油库现代化水平的主要标志之一.文中是为某油库设计的基于PLC和组态王的自动收发油控制系统.该系统采用上下位机控制模式,上位机采用工控机 组态软件,下位机采用Q系列PLC,充分发挥各自优势,实现油库收发油作业的完整监控工作.     

基于S7-400与PROFIBUS的油库收发油自动控制系统

本系统应用PROFIBUS现场总线把S7-400PLC、ET200M与远程设备连接起来,自动进行油库收发油的过程数据采集、现场设备控制和实时故障诊断,并通过PROFIBUS现场总线、WinCO组态软件在上位工控机实现系统的人机交互、远程监控功能.本系统适用于对油库收发油的作业效率、工作准确性和自动控制水平要求较高的场合.     

组合式光纤流量传感器应用研究

本文针对油库收发油品时人工计量存在的问题，根据流量测量自动化的要求，并结合油品计量精度要求高、防火防爆要求苛刻的特点，提出了组合式光纤流量传感的方案。根据组合式传感的特点及油库现场应用的要求，文章详细讨论了光纤发讯头、光发射机、光接收机等关键环节的难点及解决的办法，从而给出了整个组合式光纤流量传感器系统，并实际应用于油库现场，经受住了现场的各种考验。     

大型油库自动计量与控制系统

以山西平朔油库为背景,基于PLC与组态王提出了油库自动计量与控制系统的设计思想和实施方案.采用PLC为下位机实现控制系统的实时数据采集和状态判别,以工控机为上位机结合组态软件KingView6.52实现数据的计量与综合管理,全面改善了系统设备状态显示、计量精度以及相关数据统计等功能,有效提高了油库生产和管理的自动化水平,对油库企业的发展有一定意义.     

铁路油库油罐状态监测系统设计

铁路储油库为机车用油提供能源保障，因此对其状态进行实时监测十分必要。由温度传感器、压力变送器、液位变送器、智能仪表和组态软件Kingview6．03组成的铁路油库油罐状态监测系统可实现对油库油罐状态的自动监测，进而实现油库管理自动化，可降低成本、提高运行可靠性。     

油库可燃气体报警系统设计与应用

油库在卸油、付油、油品储存、管道传输等过程中,由于油气渗漏会产生不安全因素;因而介绍了一种利用KD-5S(H)可燃气体传感器、89C51单片机、工控机组成的可燃气体报警系统;利用本系统可实现全自动、全天候、并可远程传输的可燃气体检测与报警功能.     

基于Zigbee技术的地震救援队生命采集系统

讨论了Zigbee无线网络技术在地震救援队员生命采集系统中的应用设计。Zigbee网络技术完全能满足脉搏、心跳等生理信息传输量不大的实时传输要求。该系统采用微控制器GT60和无线收发芯片MC13192和CC2420作为收发模块。信号处理部分采用MSP430F149单片机。     

基于无线射频技术的传感器温度采集系统

设计了基于射频无线通信技术的温度数据采集系统,阐述了系统的实现原理和方法.系统下位机采用集成温度传感器AD590和集成模数转换器ADC0804完成数据采集,并通过无线收发模块nRF905发送;上位机利用无线收发模块nRF905接收数据并通过串口传送给PC机进行实时监测.系统电路结构简单,工作稳定可靠,改变了传统线缆直连实现信号传输的方式,极大地提高了设备应用的灵活性,并且可以实现多种信号的采集.     

液压系统长管道噪声的消除

我们为某研究所设计制造了一台港池蛇形不规则波造波机，它是用于在实验水池中造出模拟规则波和不规则波波谱的专用设备。设备采用电液们眼系统。设备由18个电液伺服闭环控制系统并联而成。造波机液压系统如图1所示。系统包括18个伺服液压缸、18个电液伺服阀、18个位移传感器、9个滤油器、3个蓄能器和相当长的管道。压油和回油管道总管各长达50～80m，其中胶管各长达25m，压油和回油支管各6支，长3．sin，压油和回油分支管各18支，长lin。可见系统管道很长，而且管道布置也相当复杂。在造波机调试的过程中，系统管道曾产生强烈的噪声。用手…     

基于MG801A模块的单片机短信息收发系统设计

为了克服用手机发送短信时键盘空间的限制,设计了基于MG801A无线收发模块的短信收发系统.该系统由硬件系统和软件系统两部分组成.硬件系统主要由MG801A收发模块及其外围电路组成收发终端,并通过RS232串口与PC机连接;软件部分主要由单片机向模块发送AT（Attention）指令,从而使系统完成短信收发功能.     

油缸油嘴焊接机的设计与分析

本文所述的油缸油嘴焊接机通过优选结构和运动参数,用ＣＯ２作为保护介质,在焊丝匀速回转的同时工件作上下往复运动,以此合成运动来实现油缸油嘴的焊缝轨迹。该机除装卸工件外全部自动化,其结构简单紧凑,操作方便,保证了质量,提高了效率。     

汽车变速器注排油装置的设计

在变速器放油口处依次完成注油和排油,同时完成对润滑油的检测,简化工艺过程,从而缩短了变速器交检周期.     

Palm oil and mineral oil based lubricants—their tribological and emission performance

A comparative study of wear, friction, viscosity, lubricant degradation and exhaust emissions was carried out on a palm oil and a mineral oil-based commercial lubricating oil. The wear and friction test was at first conducted using a reciprocating universal wear machine followed by a two-stroke gasoline Yamaha portable generator set, ET 950. The test conditions for the bench test were: pressure, 3.0 MPa; sliding speed, 0.20 m s⁻¹; sliding stroke, 80 mm; room temperature, 25°C. The test conditions for the actual engine were: constant load, 0.4 kW for wear of the piston ring but various loads for exhaust emissions and constant speed, 2800 rpm. Analysis of post bench test lubricating oils was performed using ISL viscometer, TAN/TBN analyzer and FT-IR spectroscopy to investigate viscosity, TAN value and the oxidation level, respectively. Exhaust emission analysis was also performed using a BOSCH exhaust gas analyzer. Experimental results demonstrated that the palm oil based lubricating oil exhibited better performance in terms of wears, and that the mineral oil based lubricating oil exhibited better performance in terms of friction. However, the palm oil based lubricant was the more effective in reducing the emmission levels of CO and hydrocarbon.     

Effects of water in oil and oil in water on single-phase flowmeters

The effect of two-phase flow on the performance of a range of single-phase flowmeters has been investigated experimentally using the National Standard Multiphase Flow facilities at NEL. The flowmeters tested were 2-inch and 4-inch positive displacement meters, venturi meters, helicoidal and flat-bladed turbine meters, 2-inch U-tube, 3-inch and 1.5-inch straight tube Coriolis meters and a 4-inch vortex shedding meter. The flowmeters were tested in oil flow with water and water flow with oil. The second component fractions were varied from 3% up to 15% by volume. The aim of the project was to quantify the effect of second-phase fluid components on the basic uncertainty of a range of single-phase. These tests have provided evidence of the suitability of particular flowmeters for two-component flow applications. Comparisons have been made between generic type and size of flowmeter. The oil-in-water and water-in-oil tests indicated that the uncertainty in the outputs of the flowmeters tested were generally within ±1% relative to the reference flowrates, although some errors as high as 5–10% were also observed. Most of the measurements from the turbine flowmeters and the positive displacement flowmeters were within ±0.4% of the reference flowrates.     

对电动机换向智能抽油机油封失效原因的分析与预防措施

摆线针轮减速机是电动机换向智能抽油机的核心部件，但是在使用中常发生油封失效导致减速机漏油，直接影响了采油生产。对油封密封理论进行了探讨，还详细分析了产生油封失效的原因，并提出了预防措施，以提高抽油机的整体质量。     

全自动燃油锅炉燃烧器油路系统研制

介绍了自制国产燃油锅炉燃烧器的特点,及燃烧器油路系统的组成、工作原理及应用。     

油膜轴承供油量的一种理论计算方法

由于油膜轴承的供油量对轴承的性能影响很大,一种基于流体动力润滑理论同时又具有指导性的最大供油量的计算方法对于理论研究和实际应用十分有益.研究了轴承供油量与其负荷、几何参数及粘度等诸多因素之间的关系,为轴承的设计和校核提供了依据.     

Study of start-up vibration response for oil whirl, oil whip and dry whip

Oil whip induces self-excited vibration in fluid-handling machines and causes self-excited reverse precessional full annular rub, known as “dry whip”, which is a secondary phenomenon resulting from a primary cause, that is, “coexistence of oil whip and dry whip”. For predicting these instabilities, the clues are hidden in start-up vibration signals of these kinds of machines. This paper presents a method for predicting these kinds of instabilities. First, a Hilbert spectrum combining a full spectrum, which is named the “full Hilbert spectrum”, is developed to reveal the whole process. Next, the transient position of a shaft centerline combining an acceptance region is introduced to predict instability at an early stage. The results presented in this study amply demonstrate the transition from stability to instability and the behavior of fluid-induced instability and rub in rotor systems. By this finding, bearing designers can completely understand these instability phenomena existing in fluid-handling machines. As a result, the control parameter for designing controllable bearings can be obtained and the instability problems can be resolved. Consequently, these findings are worth noting.     

Diaphragm pumps for oil and gas

The characteristic features of diaphragm pumps, such as high suction pressure and airtight sealing, make them particularly suitable for a variety of metering and process applications in the oil and gas industry.