联系人:何经理
邮箱:2235954483@qq.com
电话:13313705507
地址: 福建漳州市龙海市福建省漳州开发区招商大厦707号
| 品牌 |
NI |
型号 |
SCXI-1304 |
| 类型 |
DCS |
加工定制 |
否 |
| 是否进口 |
是 |
|
随着旋转机械的出现,高速转子已引起工程师们的兴趣。在过去的一个世纪里,旋转机械的应用范围很广,从用于发电的蒸汽轮机到用于航天飞机主发动机的涡轮泵。随着这些机器变得越来越普遍,对轻巧、紧凑的设计的需求也在增加。这些装置所需的功率输出也有所增加,从而导致更高的功率重量比。这些更精简的设计是航空航天工业的标志。
振动问题在高功率重量机器中更频繁地发生,通常会导致代价高昂的停机时间、随后的重新设计,在某些情况下还会导致灾难性故障。旋转机械中不成比例的振动问题可归因于高度预旋的流体进入密封件和流体轴承等紧密间隙位置。高流体预涡流和不良振动问题之间的关系是显而易见的。具有高水平流体预涡流的机器更容易出现不稳定和振动问题。
因此,转子动态设计的重中之重是开发装置,以限度地减少流体预旋流进入紧密间隙位置的水平。研究人员开发了反向涡环 (RVR),这是一种用于提高涡轮机械转子动力学稳定性和响应的机制。
RVR 设计用于在进入密封件(或轴流式油膜轴承)之前调节流量,以使通过环形间隙的流量至少是纯轴向的。虽然传统的涡流制动器仅显示出最多可减少 30% 的预涡流,但 RVR 可以反转涡流的方向,从而使圆周流体速度沿与轴旋转相反的方向流动。因此,对旋转机械的典型损害成为通过 RVR 改善振动问题的资产。
RVR 具有轴向效率,通常将光滑环形密封件的轴向长度增加 10% 到 12% 的数量级。它使涡轮泵和类似设备变得更小、更轻、更快、更安全。
凭借过硬的技术实力和稳定的产品质量,ABB钢铁及有色金属部携旗下型的完整电气自动化系统解决方案参与到北方铜业股份有限公司(以下简称北方铜业)的森德威四立柱式高性能压延铜带箔二十辊可逆铜箔轧机项目中。该项目作为北方铜业母公司山西省属中条山集团“十三五”发展规划重点项目、山西省运城市2020年“1311”重点建设工程,建成后将成为年产5万吨高性能压延铜带箔的一流现代化铜带箔生产线,其主导产品铜带、铜箔定位于国家重点发展的铜基新材料,将广泛应用于航空航天、5G通讯产业、新能源、智能制造等领域,拥有广阔的市场前景。
以下是我司【主营产品】,有需要可以发来帮您对比下价格哦!
主营:世界品牌的PLC 、DCS 系统备件 模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots. FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、Panasonic Robots、MOTOMAN Robots。
⑦estinghouse(西屋): OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数据通信及处理等。Invensys Triconex: 冗余容错控制系统、基于三重模件冗余(TMR)结构的现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE, Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托):MVME 162、MVME 167、MVME1772、MVME177等系列。
PLC模块,可编程控制器,CPU模块,IO模块,DO模块,AI模块,DI模块,网通信模块,
以太网模块,运动控制模块,模拟量输入模块,模拟量输出模块,数字输入模块,数字输出
模块,冗余模块,电源模块,继电器输出模块,继电器输入模块,处理器模块。
我们的优势是:全新原装,,供给一年质保!本公司所有产品都经过严格检测,欢迎询价,收购。只需您有诚心,本公司将会给你供给一个比同行优势的价格,共同拿下单子。
With the advent of rotating machinery, high-speed rotors have been of interest to engineers. Rotating machinery has been employed in a wide range of applications in the past century, ranging from steam turbines for electric power generation to the turbo pumps used in the Space Shuttle Main Engines. As these machines have become more commonplace, there has been an increased demand for lightweight, compact designs. The required power output of these units has also increased, leading to higher power-to-weight ratios. These leaner designs are the hallmark of the aerospace industry.
Vibration problems, which occur more frequently in high-power-to-weight machines, often lead to costly downtime, subsequent redesign, and in some instances, catastrophic failure. A disproportionate number of vibration problems in rotating machinery can be attributed to highly pre-swirled fluid entering tight clearance locations such as seals and fluid bearings. The relationship between high fluid pre-swirl and undesirable vibration issues is clear. Machines with high levels of fluid pre-swirl are more susceptible to instabilities and vibration problems.
A top priority in rotor dynamic design, therefore, is to develop devices to minimize the level of fluid pre-swirl entering tight clearance locations. Researchers have developed the Reverse Vortex Ring (RVR), a mechanism for improving rotordynamic stability and response in turbomachinery.
The RVR was designed to condition the flow prior to entering the seal (or axial flow fluid-film bearing) so that the flow through the annular clearance is, at a minimum, purely axial. While conventional swirl brakes have only been shown to reduce pre-swirl by up to 30%, the RVR can reverse the direction of the swirl, so that circumferential fluid velocity flows in a direction counter to shaft rotation. Thus, a classic detriment to rotating machinery becomes an asset to ameliorate vibration issues through the RVR.
The RVR is axially efficient, typically increasing the axial length of a smooth annular seal on the order of 10 to 12%. It allows turbopumps and similar devices to be made smaller, lighter, faster, and safer.