本文關(guān)鍵詞： 安全閥 反沖效應(yīng) 反沖盤 傳感器　出處：《華南理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：作為一種防止超壓的安全裝置，安全閥在超壓介質(zhì)的作用下迅速開啟和及時排放是最重要的性能指標(biāo)之一。從安全閥的動力學(xué)得知全啟式安全閥的反沖盤產(chǎn)生的反沖效應(yīng)對于安全閥的快速開啟起著重要的作用，安全閥不需要很大的壓力就借助于反沖效應(yīng)使得開啟力成倍增加，，因而反沖效應(yīng)的研究至關(guān)重要。但是到目前為止，很少有公開發(fā)表的文獻(xiàn)探討和研究這個問題。 本文從理論和實驗兩方面來定量分析反沖效應(yīng)。 理論部分：1）首先利用Pro/E軟件建立三維非對稱模型，基于動網(wǎng)格和流固耦合技術(shù)，通過數(shù)值模擬分析軟件CFX對安全閥超壓泄放過程進(jìn)行了動態(tài)模擬，并結(jié)合反沖效應(yīng)的物理意義，克服目前反沖效應(yīng)研究的局限性，利用區(qū)域分解法，實現(xiàn)了對反沖效應(yīng)的定量計算。并與二維對稱模型結(jié)果進(jìn)行對比。2）通過改變影響反沖效應(yīng)的相關(guān)結(jié)構(gòu)參數(shù)，探討反沖效應(yīng)與關(guān)鍵結(jié)構(gòu)參數(shù)之間的關(guān)系。 實驗部分：1）結(jié)合安全閥在線檢測系統(tǒng)，得到上下閥瓣的壓力檢測曲線，再通過反沖效應(yīng)的物理意義得到了全開啟過程的反沖力曲線，并與模擬結(jié)果進(jìn)行對比；2）通過改變反沖盤結(jié)構(gòu)，在反沖盤下邊緣上設(shè)置檢測點，得到了開啟過程中檢測點的壓力變化曲線，并與模擬結(jié)果相應(yīng)點的壓力進(jìn)行對比，驗證了方法的合理性。 通過實驗和模擬計算實現(xiàn)了對安全閥反沖效應(yīng)的定量計算，同時得到了反沖力與關(guān)鍵結(jié)構(gòu)參數(shù)之間的關(guān)系，可通過改變它們來控制反沖效應(yīng)的大小，對安全閥性能分析具有重要的意義。
[Abstract]:As a safety device to prevent overpressure, The quick opening and timely discharge of safety valve under the action of overpressure medium is one of the most important performance indexes. From the dynamics of safety valve, we know that the recoil effect of full open safety valve backflushing effect on the quick opening of safety valve. Plays an important role, The safety valve does not need a great deal of pressure to double the opening force by means of recoil effect, so the study of recoil effect is very important, but so far, there are few published papers to discuss and study this problem. In this paper, the recoil effect is quantitatively analyzed from both theoretical and experimental aspects. Firstly, the three-dimensional asymmetric model is established by using Pro/E software. Based on the dynamic grid and fluid-solid coupling technology, the overpressure release process of the relief valve is simulated dynamically by the numerical simulation software CFX. Combining with the physical meaning of recoil effect and overcoming the limitation of current research on recoil effect, the domain decomposition method is used. The quantitative calculation of recoil effect is realized and compared with the results of two-dimensional symmetric model. 2) the relationship between backflushing effect and key structural parameters is discussed by changing the relevant structural parameters which affect the recoil effect. The experimental part: 1) combining with the safety valve on-line detection system, the pressure detection curve of the upper and lower disc is obtained, and then the recoil force curve of the whole open process is obtained through the physical meaning of the backflushing effect. By changing the structure of the recoil disk and setting the detection point on the edge of the recoil disk, the pressure change curve of the detecting point in the opening process is obtained, and the pressure of the corresponding point in the simulation result is compared with that of the simulation result. The rationality of the method is verified. The quantitative calculation of recoil effect of safety valve is realized by experiment and simulation, and the relation between recoil force and key structural parameters is obtained. The magnitude of recoil effect can be controlled by changing them. It is of great significance to analyze the performance of safety valve.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH134

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 郭崇志;幸莎;;安全閥穩(wěn)態(tài)泄放過程的瞬態(tài)模擬與試驗驗證[J];液壓與氣動;2013年04期

相關(guān)碩士學(xué)位論文 前1條

1 幸莎;安全閥開啟流場參數(shù)的模擬與試驗研究[D];華南理工大學(xué);2013年

本文編號：1535942