動壓型機械密封內(nèi)流場及性能的流固熱耦合
發(fā)布時間：2018-07-28 14:18
【摘要】：為了分析液體動壓型機械密封環(huán)變形對間隙液膜特性的影響,基于Workbench平臺建立動環(huán)-液膜-靜環(huán)的雙向流固熱耦合計算模型,對變形后的內(nèi)流場進行模擬計算,對雙向流固熱耦合前后內(nèi)流場的壓力、溫度以及螺旋槽內(nèi)速度進行對比分析,并比較了流固熱耦合后開啟力、摩擦扭矩以及泄漏量的變化.研究結(jié)果表明:經(jīng)過雙向流固熱耦合計算后,液膜在動環(huán)端面附近受壓縮,在靜環(huán)端面附近沿周向呈明顯波浪狀周期性波動,外徑處液膜平均厚度減小、內(nèi)徑處液膜平均厚度增大,液膜厚度最大變化約16.0%;雙向流固熱耦合前后壓力場、溫度場分布規(guī)律類似,但液膜最高壓力明顯變大,在文中計算工況下變大約67.0%,液膜最高溫度略有變大,螺旋槽根部附近液體流速降低;考慮了流固熱耦合變形后,液膜開啟力變大,摩擦扭矩略微變大,泄漏量明顯變大,且轉(zhuǎn)速越高各密封性能參數(shù)的變化越大.
[Abstract]:In order to analyze the effect of hydrodynamic pressure seal ring deformation on the characteristics of liquid film, a bidirectional fluid-solid-heat coupling calculation model was established based on Workbench platform, and the internal flow field after deformation was simulated. The pressure, temperature and velocity in the helical groove before and after the bidirectional fluid-solid-heat coupling are compared and the changes of the opening force, friction torque and leakage rate after the fluid-solid-heat coupling are compared. The results show that the liquid film is compressed near the end surface of the moving ring after bidirectional fluid-solid-heat coupling calculation, and fluctuates obviously along the circumferential direction, and the average thickness of the liquid film decreases at the outer diameter. The average thickness of liquid film increases and the maximum thickness of liquid film changes about 16.0 at the inner diameter. The distribution of pressure field and temperature field before and after bidirectional fluid-solid-thermal coupling is similar, but the maximum pressure of liquid film increases obviously. In this paper, the maximum temperature of liquid film increases slightly, and the velocity of liquid near the root of spiral groove decreases. Considering the fluid-solid-heat coupling deformation, the opening force of liquid film becomes larger, the friction torque is slightly larger, and the leakage volume is obviously increased. And the higher the rotational speed, the greater the change of the sealing performance parameters.
【作者單位】： 江蘇大學(xué)能源與動力工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51279067)
【分類號】：TH136
，
本文編號：2150489
[Abstract]:In order to analyze the effect of hydrodynamic pressure seal ring deformation on the characteristics of liquid film, a bidirectional fluid-solid-heat coupling calculation model was established based on Workbench platform, and the internal flow field after deformation was simulated. The pressure, temperature and velocity in the helical groove before and after the bidirectional fluid-solid-heat coupling are compared and the changes of the opening force, friction torque and leakage rate after the fluid-solid-heat coupling are compared. The results show that the liquid film is compressed near the end surface of the moving ring after bidirectional fluid-solid-heat coupling calculation, and fluctuates obviously along the circumferential direction, and the average thickness of the liquid film decreases at the outer diameter. The average thickness of liquid film increases and the maximum thickness of liquid film changes about 16.0 at the inner diameter. The distribution of pressure field and temperature field before and after bidirectional fluid-solid-thermal coupling is similar, but the maximum pressure of liquid film increases obviously. In this paper, the maximum temperature of liquid film increases slightly, and the velocity of liquid near the root of spiral groove decreases. Considering the fluid-solid-heat coupling deformation, the opening force of liquid film becomes larger, the friction torque is slightly larger, and the leakage volume is obviously increased. And the higher the rotational speed, the greater the change of the sealing performance parameters.
【作者單位】： 江蘇大學(xué)能源與動力工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51279067)
【分類號】：TH136
，
本文編號：2150489
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