本文選題：泄漏量 + 動密封性能評估模型�。� 參考：《哈爾濱工業(yè)大學》2016年碩士論文

【摘要】：本文旨在建立一種以泄漏量為指標、用于“O型圈+PTFE密封條”組合式密封的動密封性能評估模型,為電液擺動馬達密封件的工程化設計提供理論依據。本文所建模型基于彈性流體潤滑理論,與已有模型相比,引入PTFE各向異性、溫度場和表面粗糙度,重點討論PTFE各向異性、工況參數、材料力學性能和材料改性方法對模型的影響。完成MATLAB數值求解和ADINA熱流固耦合仿真并分析得到數據的變化趨勢,以實現數學模型和仿真模型的互相驗證。首先,基于彈流潤滑理論、綜合考慮PTFE各向異性、溫度場和表面粗糙度等影響因素,建立泄漏量的數學模型。該模型引入了溫度場,可實現熱流固耦合計算;同時,由于將PTFE的各向異性直接反映在油膜厚度計算公式中,因此能夠更清晰地研究各向異性的影響。其次,分別求得考慮和未考慮各向異性時泄漏量等指標的數值解,并作出比較,進一步研究各向異性對數學模型的影響程度。此外,還討論了工況條件和材料力學性能參數對泄漏量數學模型的影響,并做出理論分析。最后,在ADINA中建立熱流固耦合模型,分析各不同參數對密封間隙處油膜厚度、油液壓力和溫度場的影響。為完成數學模型和仿真模型正確性的驗證,從多方面比較了MATLAB數值解和ADINA仿真解的異同。
[Abstract]:The purpose of this paper is to establish a dynamic seal performance evaluation model for "O-ring PTFE sealing strip" combined seal, taking leakage quantity as the index, and to provide a theoretical basis for the engineering design of electro-hydraulic swing motor seal. The model is based on the theory of elastofluid lubrication. Compared with the existing model, the PTFE anisotropy, temperature field and surface roughness are introduced. The PTFE anisotropy and the operating parameters are discussed in detail. Effects of mechanical properties of materials and modification methods on the model. MATLAB numerical solution and ADINA heat fluid-solid coupling simulation are completed and the variation trend of the data is analyzed to realize the mutual verification of the mathematical model and the simulation model. Firstly, based on the theory of elastohydrodynamic lubrication, a mathematical model of leakage is established by considering the PTFE anisotropy, temperature field and surface roughness. This model introduces the temperature field to realize the heat fluid-solid coupling calculation, and because the anisotropy of PTFE is directly reflected in the oil film thickness calculation formula, the influence of anisotropy can be studied more clearly. Secondly, the numerical solutions of the leakage rate with and without anisotropy are obtained and compared to study the influence of anisotropy on the mathematical model. In addition, the effects of operating conditions and mechanical properties of materials on the mathematical model of leakage are discussed, and the theoretical analysis is made. Finally, a heat fluid-solid coupling model is established in ADINA to analyze the effects of different parameters on the oil film thickness, oil pressure and temperature field at the seal clearance. In order to verify the correctness of the mathematical model and the simulation model, the similarities and differences between the MATLAB numerical solution and the ADINA simulation solution are compared from many aspects.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TH136

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本文編號：1869196