本文選題：乳化液 + 滑靴副　； 參考：《中國礦業(yè)大學》2017年碩士論文

【摘要】：高水基液壓馬達中的滑靴副作為馬達關鍵摩擦副之一,以乳化液為潤滑介質,運行在重載、低速的工況下,極易導致滑靴副因摩擦磨損失效。表面織構技術有近三十年的研究歷史,廣泛應用于活塞環(huán)耐磨研究,流體減阻與機械密封等方面。本文針對高水基液壓馬達滑靴副的摩擦磨損問題,應用表面織構技術改善了滑靴副的摩擦學性能。主要以滑靴副的三種工況為研究對象,分別對應全流體潤滑狀態(tài)、干摩擦狀態(tài)、混合潤滑狀態(tài)。采用Fortran、ANSYS、LS-DYNA等數(shù)值分析軟件,優(yōu)化設計織構參數(shù)并分析織構表面滑靴副的摩擦學性能,最后實驗研究了織構表面滑靴副的摩擦學性能。首先,分析在正常工作條件下織構表面滑靴副的潤滑性能。研究的參數(shù)主要包括織構形狀、織構占有率、織構深度、液膜厚度,表征潤滑性能的參數(shù)為平均液膜壓力、摩擦系數(shù)、液膜壓力分布曲線、液膜壓力分布云圖等。研究結果表明:最佳織構占有率為0.5,最佳織構深度比液膜厚度略大,最佳織構中心距為1000μm,最佳織構形狀為圓柱形織構。其次,分析在馬達啟動時刻織構表面滑靴副的摩擦學性能和熱力學性能。研究的參數(shù)為織構占有率、織構深徑比、織構形狀以及載荷,表征摩擦學性能與熱力學性能的參數(shù)為接觸應力、等效應力、應力分布云圖、溫度-時間曲線、溫度分布云圖等。研究結果表明:當織構占有率為0.12、深徑比為0.2、形狀為圓柱形時,滑靴副在該工況下的摩擦學與熱力學性能最好。再次,分析了在馬達制動或超載時刻織構表面滑靴副的摩擦學性能。研究結果表明:在該工況條件下,織構表面滑靴副在流體動壓潤滑階段持續(xù)時間較長,上下試樣碰撞次數(shù)與碰撞時間均較少,在穩(wěn)定運行階段滑靴副的上試樣等效應力較小。最后,實驗研究了最佳織構參數(shù)的織構表面滑靴副的摩擦學性能。通過對比分析可知,在極限載荷條件下,織構表面摩擦副的摩擦學性能較差,摩擦磨損嚴重。當載荷適當時,織構表面摩擦副的摩擦學性能均優(yōu)于光滑表面摩擦副的摩擦學性能,尤其是在運行高速的條件下。
[Abstract]:As one of the key friction pairs in the high water base hydraulic motor, the slipper pair is easy to lose due to friction and wear when the emulsion is used as the lubricating medium under the condition of heavy load and low speed. Surface texture technology has a history of nearly 30 years. It is widely used in wear resistance research of piston ring, fluid drag reduction and mechanical seal. In this paper, the friction and wear problem of high water base hydraulic motor slipper pair is studied. The surface texture technique is used to improve the tribological performance of the slipper pair. The three working conditions of the slipper pair are taken as the research object, corresponding to the full fluid lubrication state, the dry friction state and the mixed lubrication state respectively. By using Fortrann ANSYSLS-DYNA and other numerical analysis software, the texture parameters were optimized and the tribological properties of textured surface slipper pairs were analyzed. Finally, the tribological properties of textured surface slipper pairs were studied experimentally. Firstly, the lubrication performance of textured surface slipper pair is analyzed under normal working conditions. The main parameters studied include texture shape, texture occupancy, texture depth, liquid film thickness, average film pressure, friction coefficient, liquid film pressure distribution curve, liquid film pressure distribution cloud diagram and so on. The results show that the optimum texture occupancy is 0.5, the optimum texture depth is slightly larger than the liquid film thickness, the optimum texture center distance is 1000 渭 m, and the optimum texture shape is cylindrical texture. Secondly, the tribological and thermodynamic properties of the textured surface slipper pair at the starting time of the motor are analyzed. The parameters studied are texture occupancy, texture depth / diameter ratio, texture shape and load. The parameters that characterize the tribological and thermodynamic properties are contact stress, equivalent stress, stress distribution cloud diagram, temperature-time curve, temperature distribution cloud diagram, etc. The results show that when the ratio of texture is 0.12, the ratio of depth to diameter is 0.2, and the shape is cylindrical, the tribological and thermodynamic properties of the pair are the best under this condition. Thirdly, the tribological properties of textured surface slipper pairs during motor braking or overload are analyzed. The results show that under this condition, the texture surface slipper pair lasts longer in hydrodynamic lubrication stage, and the impact times and time of upper and lower samples are less, and the equivalent stress of the upper sample is smaller in the stable running stage. Finally, the tribological properties of the texture surface slipper pair with optimum texture parameters are studied experimentally. Through comparison and analysis, it can be seen that the tribological properties of textured surface friction pairs are poor and the friction and wear are serious under the condition of limit load. When the load is appropriate, the tribological properties of textured surface friction pairs are better than those of smooth surface friction pairs, especially at high speed.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH137.51;TH117

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