本文選題：形貌特征 + 微造型��； 參考：《北京化工大學學報(自然科學版)》2016年01期

【摘要】：提出一種在煤礦水壓閥閥芯表面加工規(guī)律分布的微造型形貌以改善閥芯潤滑性能的方法,并著重分析其形貌特征對閥芯潤滑及泄漏特性的影響。建立了相關幾何及數學模型,并采用基于N-S方程的計算流體力學(CFD)進行數值求解。求解結果表明:微造型動壓潤滑性能受微觀形貌影響大,不同形貌下的壓力分布狀況及承載力大小不同;合適的閥芯微造型形貌能有效改善閥芯的潤滑性能,且除三角形外其他形貌均能產生液膜動壓支撐;球冠形具有最小的剪切摩擦力和泄漏量,在面積率為36%時,泄漏量相對于其他形貌下降近7.5%,剪切摩擦力減小約36.5%。同時球冠形形貌加工方便,具有較大的極限面積率,因此可選用面積率較高的球冠形形貌以改善微造型閥芯的潤滑及泄漏特性。
[Abstract]:In order to improve the lubricating performance of the valve core, a new method is proposed to improve the lubricating performance of the valve core, and the influence of its morphology on the lubrication and leakage characteristics of the valve core is analyzed. The related geometric and mathematical models are established and solved numerically by using CFDs based on N-S equation. The results show that the hydrodynamic lubrication performance of micro-molding is greatly affected by micro-morphology, and the pressure distribution and bearing capacity are different under different morphologies, and the suitable micro-shape of valve core can effectively improve the lubrication performance of the valve core. The spherical crown has the smallest shear friction force and leakage volume. When the area ratio is 36, the leakage rate decreases by 7.5% and the shear friction decreases about 36.5%. At the same time, the spherical crown shape is easy to process and has a large limit area ratio. Therefore, the spherical crown shape with higher area ratio can be used to improve the lubrication and leakage characteristics of the microshaped valve core.
【作者單位】： 安徽理工大學機械工程學院;合肥南車軌道交通車輛有限公司技術工程部;
【基金】：流體動力與機電系統國家重點實驗室開放基金(GZKF-201205) 安徽省科技計劃(1301022074) 國家自然基金(51205002)
【分類號】：TD40

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本文編號：2007413