共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
3.
4.
文章对直流SCR传动系统与交流变频电动钻机系统的性能特点进行了分析比较,并以ZJ70DB型交流变频电动钻机及配置完全相同的ZJ70D型直流钻机为例,进行了两种系统的经济性的对比,结果表明,交流变频电动钻机技术无论在技术性能方面还是在采购成本和运行维护方面都具有更大的优势。 相似文献
5.
介绍了利用西门子S7-300PLC系统与人机界面TK6070iH HMI控制BGC-200打包机液压系统及运包小车变频运行系统。人机界面与西门子PLC控制系统的设计应用,实现了电气控制限位、故障条目、操作步骤等画面信息的自动控制。 相似文献
6.
变频调速恒钻压自动送钻系统 总被引:1,自引:0,他引:1
针对手动送钻和电磁阀控制刹车恒钻压自动送钻的不足,开发了变频调速恒钻压自动送钻系统,该系统采用电动机反拖实现钻进时钻压恒定。在详细讨论送钻过程钻压变化简化数学模型的基础上,给出恒钻压自动送钻系统的数字模型。采用西门子变频器和变频电动机建立了变频调速恒钻压自动送钻系统的配置,现场实际调试达到了设计要求。 相似文献
7.
8.
9.
变频调速节能控制技术因其节能、安全、易控制、操作方便等优点,在油田生产领域得到广泛应用。针对变频控制技术在油井应用中产生的成本价格高、自身耗电问题,抽油机油井存在倒发电问题,以及油井大量变频设备应用产生的谐波污染信号问题,提出了一种直流供电配置的抽油机变频群控系统的技术解决方案,介绍了该系统组成及工作原理、系统功能与特点、现场应用情况以及应用效果综合分析评价。实践证明,该系统技术先进,性价比高,性能优越,具有良好的推广应用价值。 相似文献
10.
随着油田开发及生产规模变化,部分节能设备无法满足实际生产需求,尤其是在低渗透、高含水率区块,问题更加突出。针对以上现状,选取开发早、建设时间长、能代表高含水率区域开发特点的地区进行能耗分析,根据机采系统、地面系统能效普查及问题分析结果,采取“对症下药”的思路,应用一变多井耦合式共直流母线群控、永磁半直驱、变频改造等技术实施改造。结合技术前期应用情况,对实施后投入产出进行预测,探索适用于外围低渗透油田节能降耗挖潜思路及方法,有效推动节能降耗向纵深挖潜。 相似文献
11.
12.
介绍了石油库油泵电机拖动的四种方法,直接启动、降压启动、软启动和变频启动,并对四种启动方法进行了技术经济综合分析,依据各种方法的优缺点和电机的应用目的给出了通常选用的做法,指出为避免造成不必要浪费,泵房电机拖动方法的选择应达到技术先进、方案合理、运行经济可靠的目的。 相似文献
13.
G. M. Khazhinskii 《Chemical and Petroleum Engineering》2005,41(3-4):122-125
A semi-empirical model is developed for analysis of stresses in a dent. Variation in maximum stress intensity in dents with different angular orientations relative to the shell’s generatrix is demonstrated. Results of stress analysis are presented for a dent oriented along the generatrix of a pipe as a function of the dent’s geometric parameters.__________Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, No. 3, pp. 14–16, March, 2005. 相似文献
14.
比较当前螺旋焊管机组主驱动电气传动的几种方式,提出了应用变频调速的可行性.介绍了利用日本三菱FR系列FR-A540-37K型变频器改造传统交流异步电机拖动机械减速装置,改变螺旋焊管机组主驱动速度的硬件选择、线路设计及变频器的数据设定.改造后的变频调速系统不仅减轻了工人的劳动强度,提高了调速精度,而且故障率低,降低了能耗. 相似文献
15.
在石油机械中,有许多母线为非圆曲线的回转体零件难以用数控机床加工。文章以母线为椭圆曲线的回转体零件为例,建立了该曲线的近似数学模型,以便在数控机床上加工,即,通过若干个圆弧段来近似模拟椭圆曲线.利用数控机床中的圆弧插补功能来实现此类零件的加工。 相似文献
16.
应用PWM整流器的工作原理和数学模型,提出了高功率因数变频器的PI调节电流控制原理及软件实现流程图。将这种变频器运用到抽油机用交流变频电动机中,可实现平稳启动、制动与调速,还可实现能量的反馈,达到节能的目的。 相似文献
17.
Abstract The direct conversion of methane to petrochemical feedstocks and to transportation fuels, by-passing the synthesis gas step, is a continuing challenge in catalytic process development. There are high economic incentives to commercialize direct methane conversion to formaldehyde and methanol, and even higher economic incentives for conversion to ethylene and aromatic hydrocarbons. Current process developments in the direct conversion of methane to methanol, formaldehyde, ethylene and aromatics are reviewed. The processes are discussed in terms of process conditions, catalysts used, methane conversion, and product selectivities. The economics of direct methane conversion are discussed. An economic evaluation of ethylene production by the oxidative coupling of methane has been carried out. Results show that laboratory methane conversions and product selectivities are now sufficiently high to make this process economically attractive compared with conventional ethylene production. 相似文献
18.
The direct conversion of methane to petrochemical feedstocks and to transportation fuels, by-passing the synthesis gas step, is a continuing challenge in catalytic process development. There are high economic incentives to commercialize direct methane conversion to formaldehyde and methanol, and even higher economic incentives for conversion to ethylene and aromatic hydrocarbons. Current process developments in the direct conversion of methane to methanol, formaldehyde, ethylene and aromatics are reviewed. The processes are discussed in terms of process conditions, catalysts used, methane conversion, and product selectivities.
The economics of direct methane conversion are discussed. An economic evaluation of ethylene production by the oxidative coupling of methane has been carried out. Results show that laboratory methane conversions and product selectivities are now sufficiently high to make this process economically attractive compared with conventional ethylene production. 相似文献
The economics of direct methane conversion are discussed. An economic evaluation of ethylene production by the oxidative coupling of methane has been carried out. Results show that laboratory methane conversions and product selectivities are now sufficiently high to make this process economically attractive compared with conventional ethylene production. 相似文献
19.