發(fā)布時間：2018-06-22 01:18

  本文選題：易汽化介質(zhì) + 變頻控制技術(shù)�。� 參考：《華南理工大學》2015年碩士論文

【摘要】：中國目前是全球第二大石油消費國,消費量僅次于美國,每天都有大量的燃油由加油機售出。而這些燃油大多為易汽化介質(zhì),因其較高的飽和蒸汽壓,在其泵送過程中存在泵送效率低,計量精度不高等問題,這樣使得燃油加注過程中的能量損耗大大增加。本文首先分析了現(xiàn)有的燃油泵送系統(tǒng)在效率、精度等方面上的存在的一些不足。然后在變頻控制技術(shù)的基礎上,通過理論分析、數(shù)值計算以及實驗驗證,探究了提高燃油泵送效率和計量精度,以及減小水擊效應的新型泵控模式。本文的研究內(nèi)容主要包括以下幾個方面:(1)針對現(xiàn)有易汽化介質(zhì)普遍存在的泵送效率不高的特點,在詳細分析泵送系統(tǒng)的效率組成及特點,并在大量實驗的基礎上,提出了能效自適應的控制方法。即通過使用變頻控制技術(shù),實時查找泵送系統(tǒng)在不同工況條件下的運行效率,然后使其在效率最高的頻率點運行。并對該控制方法的泵送效率進行了相應的驗證實驗。(2)建立了最小被測量加注誤差的數(shù)學模型,提出了帶有緩沖頻率的變頻加注方法,同時搭建了加注精度的測試平臺,并通過實驗驗證了該加注方法在控制精度方面的效果。(3)探究了燃油泵送系統(tǒng)由水擊效應帶來的危害,通過數(shù)學推導得到水擊計算的數(shù)學模型。搭建了關閥水擊的測試平臺,驗證該計算模型的準確性。通過MATLAB仿真得到管道流量、管道長度、管道直徑以及關閥時間對關閥水擊的影響。最后提出基于變頻技術(shù)的減小水擊的控制措施。
[Abstract]:China is now the world's second-largest oil consumer, second only to the United States, with large quantities of fuel sold by tankers every day. However, most of these fuels are vaporized medium, because of their high saturated vapor pressure, there are some problems such as low pumping efficiency and low measurement precision in the pumping process, which greatly increases the energy loss in the fuel injection process. In this paper, the shortcomings of the existing fuel pump delivery system in efficiency and precision are analyzed. Then on the basis of frequency conversion control technology, through theoretical analysis, numerical calculation and experimental verification, a new pump control mode is explored to improve fuel pump delivery efficiency and measurement accuracy, and to reduce water hammer effect. The research contents of this paper mainly include the following aspects: (1) in view of the characteristic that the pump efficiency is not high in the existing vaporizing medium, the composition and characteristics of the pumping system are analyzed in detail, and on the basis of a large number of experiments, An adaptive control method for energy efficiency is proposed. That is, by using frequency conversion control technology, the efficiency of pumping system under different working conditions can be found in real time, and then the pump system can be operated at the frequency point with the highest efficiency. The pump efficiency of the control method is verified by corresponding experiments. (2) A mathematical model of minimum measured injection error is established, and a frequency conversion injection method with buffer frequency is proposed. At the same time, a testing platform for injection accuracy is built. The effect of the injection method on the control accuracy is verified by experiments. (3) the harm caused by the water hammer effect in the fuel pump delivery system is explored, and the mathematical model of water hammer calculation is obtained by mathematical derivation. The test platform of closing valve water hammer was built to verify the accuracy of the calculation model. The effects of pipe flow, pipe length, pipe diameter and closing time on water hammer are obtained by MATLAB simulation. Finally, the control measures of reducing water hammer based on frequency conversion technology are put forward.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE974

【參考文獻】

相關期刊論文 前10條

1 李安喜;;IC卡燃油加油機的原理與修理[J];工業(yè)計量;2007年03期

2 臧忠勇;殷凱陵;;加油機計量準確度與燃油銷售[J];國際石油經(jīng)濟;2005年11期

3 黃靖;蘭剛;蔣勁;殷建國;;城市供水系統(tǒng)水錘防護措施[J];給水排水動態(tài);2013年03期

4 趙世軍;燃油加油機的相關知識[J];大眾標準化;2003年11期

5 張宏偉;韓雪梅;;車用乙醇汽油揮發(fā)性研究[J];化學與粘合;2008年04期

6 鄭同尚,范希花,袁士新,懂卓花;加油機最小被測量誤差與最小流量誤差[J];中國計量;2001年07期

7 左時均;;遠距離輸水管水錘防護措施研究[J];科技致富向?qū)?2013年12期

8 蔡俊;劉亞俊;王志泳;鄔國秀;;最小被測量精密加注控制研究[J];機床與液壓;2014年11期

9 范必;景春梅;劉向東;;建議京津冀推廣乙醇汽油[J];宏觀經(jīng)濟管理;2015年02期

10 陳瑜琦;王靜;蔡玉梅;;發(fā)展燃料乙醇和生物柴油的碳排放效應綜述[J];可再生能源;2015年02期

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本文編號：2050890