外文翻譯-----恒壓供水的控制與節(jié)能的探索(已修改)
2025-05-31 11:48 本頁面
【正文】 畢業(yè)設計 (論文 )翻譯資料 課題名稱： S7200 PLC 控制的變頻 調(diào)速恒壓供水系統(tǒng)設計 畢業(yè)設計 (論文 )起止時間： 2020 年 3 月 1 日 ～ 6 月 10 日 (共 17 周 ) 學生姓名： 學號： 指導教師： 報告日期： 1 The control and Energysaving of automatic Water Supply System Abstract: Based one simple analysis of the methods for water supply used domestically and abroad, this paper discusses the principe and system’s structure of automatic water supply system by using frequency conversion speed regulation in detail. Then the system’s advantages are discussed and some key problems that should be pay attention to designing are presented. Keyword: Frequency conversion speed regulation。 water supply with stable pressure: PID regulator. Foreword At present , supply water in residential area and life of the skyscraper of our country generally adopt the way mon frequently . It has heavy energy consumption, high noise ,and there has a great deal of questions in the source of water, such as secondary pollution etc. And it is a kind of paratively ideal mode to adjust the watersupply device controlled rapidly with frequency conversion .Entering the middle and later periods of the 1990s, as the speed technology of frequency conversion achieves more development bees perfect, the way of the fullautomatic constant pressure that based on this technology supplied water has already been widely used in the developed country , and is being riper. In recent years, author has made some real work on rapidly to the transformation in frequency conversion supply water design and construction of control system , have accumulated some experience, and has formed the view on some questions. The reason why the energyconserving principle frequency conversion of the water pump system of speed adjustment bees popularized , is mainly because that it has a better energy conserving result. To pump system of frequency conversion, the water pump after adjusting the speed has functional relation of the following: Q1/Q2 =n1/n2 (1) H1/H2 = (n1/n2)2 (2) of the type. Q1, Q2 represents the flow before and after the speed for the water pump respectively。 N1, n2 represents the rotational speed before and after the speed for the water pump respectively。 H1, H2 represents the lift before and after the speed for the water pump respectively . According the above:H1/H2=(f1/f2)2 Namely real lift of a water pump is power the square of frequency in direct radio. Therefore changing the power supply frequency of the electrical machinery of water pump through the frequency converter , can control supporting water pressure strength of the water pump . 2 constant pressure as Fig. 1 shows supply water of the automatically controlled frequency conversion water supply system principle block diagram. P1 is the give pressure value, p2 for the actual pressure value had examined from the pipeline of the pressure sensor, PID regulator passes the error operation of the two value, and through controlling the frequency output of the frequency converter, thus make the pressure of the pipeline remain throughout on establishing value p1. This system can measure users39。 instantaneous water pressure adjust automatically , regulate the amount of quantity of supplying water and operation conditions of the electric
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