本文選題：對旋風(fēng)機 + 喘振��； 參考：《安徽理工大學(xué)》2012年碩士論文

【摘要】：對旋風(fēng)機是由兩個相同型號的風(fēng)機串聯(lián)在一起組成的,兩級葉輪相距很近,緊緊地排列在一起,彼此之間旋轉(zhuǎn)方向相反,第Ⅰ級葉輪中的氣流旋繞恰好被第Ⅱ級葉輪抵消,主要應(yīng)用于公路、鐵路和煤礦等地下工程隧道的施工或局部需要強制通風(fēng)的場合。文中緒論部分簡單介紹了變頻調(diào)速技術(shù)國內(nèi)外的現(xiàn)狀,列出了本課題的研究內(nèi)容以及研究意義,為后面的理論和實驗提供了研究方向¨。 對旋風(fēng)機是特殊的軸流式風(fēng)機,比較容易發(fā)生喘振,喘振是風(fēng)機的一種不穩(wěn)定工況,發(fā)生喘振時,風(fēng)機噪音明顯增大,機身震動增強,氣流會發(fā)生強烈脈動,強烈的脈動氣流有可能會折斷葉片,造成風(fēng)機嚴(yán)重損壞,甚至?xí)＜肮ぷ魅藛T的人身安全,所以解決風(fēng)機喘振是非常重要也是非常有意義的。本文首先從理論上分析了對旋風(fēng)機和普通風(fēng)機速度三角形的區(qū)別,從微觀和宏觀兩個方面分析了風(fēng)機喘振發(fā)生的機理,從速度三角形分析,提出了一種解決對旋風(fēng)機喘振的可能性方法,并通過實驗對解決對旋風(fēng)機喘振的方法進行了研究。 本文首先通過手動變頻調(diào)速實驗,測試得到一系列風(fēng)機在不同頻率下運行的實驗數(shù)據(jù),然后用Matlab對實驗數(shù)據(jù)進行處理,實驗結(jié)果說明對對旋風(fēng)機Ⅰ級葉輪進行變頻調(diào)速可以削弱或消除喘振現(xiàn)象是可行的,也完全驗證了本文提出的解決對旋風(fēng)機喘振的理論分析。在手動變頻調(diào)速實驗成功的基礎(chǔ)上,本文介紹了一個自動變頻調(diào)速防喘振系統(tǒng)的設(shè)計方法,采用模塊化設(shè)計,對系統(tǒng)的各個硬件模塊進行了詳細的介紹,對實驗數(shù)據(jù)進行了數(shù)據(jù)標(biāo)定,對自動變頻實驗設(shè)置了安全值,并用組態(tài)王軟件設(shè)計控制界面,對整個自動變頻調(diào)速防喘振系統(tǒng)進行監(jiān)控。自動變頻調(diào)速系統(tǒng)各硬件軟件就緒后開始進行實驗,文中詳細介紹了實驗過程,并對實驗的控制界面和實驗結(jié)果進行了截圖,由截圖中的實驗結(jié)果可知,整個自動變頻調(diào)速防喘振實驗還是很成功的。 用變頻調(diào)速技術(shù)來解決對旋風(fēng)機喘振的效果是很明顯的,意義也比較重大。既可以通過自動變頻調(diào)速系統(tǒng)控制風(fēng)機的運行狀態(tài),又可以隨時防止對旋風(fēng)機喘振的發(fā)生,避免對旋風(fēng)機因喘振而造成事故。自動變頻調(diào)速防喘方法規(guī)避了普通防喘方法的局限性,為解決對旋風(fēng)機喘振提供了新的方法。
[Abstract]:The cyclone is composed of two fans of the same type in series, the two stage impellers are very close together, tightly arranged together, rotating in the opposite direction between each other, and the air swirling in the first stage impeller is exactly offset by the second stage impeller. It is mainly used in the construction of underground tunnels, such as highway, railway and coal mine, or in places where forced ventilation is required. The introduction of this paper briefly introduces the current situation of frequency conversion speed regulation technology at home and abroad, lists the research content and significance of this subject, and provides the research direction for the later theory and experiment. The whirlwind is a special axial flow fan, which is easy to surge. Surge is an unstable condition of the fan. When surge occurs, the fan noise increases obviously, the fuselage vibration increases, and the airflow fluctuates strongly. The strong pulsating airflow may break the blade, cause serious damage to the fan and even endanger the personal safety of the staff, so it is very important and meaningful to solve the surge of the fan. In this paper, the difference of velocity triangle between cyclone machine and ordinary fan is analyzed theoretically, the mechanism of fan surge is analyzed from micro and macro aspects, and the velocity triangle is analyzed. In this paper, a possible method to solve the surge of cyclone is put forward, and the method of solving surge of cyclone is studied by experiment. In this paper, a series of experimental data of fan running at different frequencies are obtained by manual frequency conversion experiment, and then the experimental data are processed by Matlab. The experimental results show that it is feasible to reduce or eliminate the surge phenomenon by frequency conversion speed regulation of the first stage impeller of the cyclone, and the theoretical analysis to solve the surge of the cyclone proposed in this paper is fully verified. On the basis of the successful experiment of manual frequency conversion speed regulation, this paper introduces the design method of an automatic frequency conversion speed regulating anti-surge system. The modular design is adopted, and the hardware modules of the system are introduced in detail. The experiment data is calibrated, the safety value is set up for the automatic frequency conversion experiment, and the control interface is designed by using Kingview software to monitor the whole anti-surge system of automatic frequency conversion speed regulation. After the hardware and software of the automatic frequency conversion speed regulating system are ready, the experiment process is introduced in detail, and the control interface and the experimental results of the experiment are taken by screenshots, which can be seen from the experimental results in the screenshots. The whole anti-surge experiment of automatic frequency conversion speed regulation is very successful. The effect of frequency conversion speed regulation on surge of cyclone is obvious, and it is of great significance. It can not only control the running state of the fan through the automatic frequency conversion speed regulation system, but also prevent the surge of the cyclone from happening at any time, and avoid the accident caused by the surge of the cyclone. The method of automatic frequency conversion and anti-panting avoids the limitation of general anti-surge method and provides a new method to solve the surge of cyclone.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH43

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