本文選題：油缸密封圈 + 仿生非光滑表面�。� 參考：《哈爾濱工程大學(xué)》2014年碩士論文

【摘要】：油缸作為液壓技術(shù)中不可或缺的執(zhí)行元件,其密封圈密封性能和摩擦阻力是制約著液壓技術(shù)發(fā)展的關(guān)鍵因素。因此,提高密封性能的同時(shí)減小摩擦阻力,對(duì)提高密封圈使用壽命和油缸工作效率有著重要的工程實(shí)際意義。將仿生學(xué)原理及減阻技術(shù)應(yīng)用到橡膠圈密封技術(shù)中達(dá)到減小密封接觸物體之間的摩擦阻力和節(jié)約能源的目的已經(jīng)成為一種嶄新的研究領(lǐng)域。本文從仿生學(xué)角度出發(fā),以黃緣真龍虱等體表特征的非光滑表面形態(tài)為生物原型,以活塞油缸密封圈為研究對(duì)象,建立具有仿生凹坑三角形組合的非光滑表面密封圈密封及減阻特性的物理模型和數(shù)值分析模型。采用ABAQUS軟件對(duì)光滑與非光滑表面橡膠密封圈的密封性能分別進(jìn)行數(shù)值計(jì)算,分析在不同壓縮量時(shí)密封圈的變形和應(yīng)力分布情況。計(jì)算結(jié)果表明,當(dāng)壓縮率為20%時(shí),光滑和非光滑表面密封圈產(chǎn)生的有效應(yīng)力都達(dá)到了油缸工作的介質(zhì)壓力3.5MPa,滿足了油缸密封圈的密封性能。對(duì)仿生凹坑三角形組合的非光滑表面密封圈的減阻特性進(jìn)行研究,確定了模型的運(yùn)動(dòng)參數(shù)和初始條件;研究了不同凹坑大小對(duì)非光滑表面減阻性能的影響,同時(shí)也分析了不同活塞運(yùn)動(dòng)速度對(duì)減阻性能的影響。計(jì)算結(jié)果表明,在活塞速度一定的情況下凹坑直徑為1.5mm時(shí)減阻率達(dá)到最大;在凹坑直徑一定的情況下,減阻率隨著初始速度的增大而不斷變大,在速度為0.6m/s時(shí)非光滑表面具有較好的減阻效果。最后,通過(guò)LS-DYNA軟件對(duì)密封圈的儲(chǔ)油凹坑進(jìn)行了流固耦合分析,建立合理的數(shù)值計(jì)算模型,對(duì)凹坑底部?jī)?chǔ)存的潤(rùn)滑油液面進(jìn)行動(dòng)態(tài)分析,研究了儲(chǔ)油凹坑對(duì)橡膠密封圈與缸體接觸表面潤(rùn)滑性能的影響。本文的研究結(jié)果表明,合理的非光滑接觸表面在一定程度上減小了密封圈的運(yùn)動(dòng)摩擦阻力,起到了減阻的效果。
[Abstract]:As an indispensable actuator in hydraulic technology, the seal performance and friction resistance of cylinder are the key factors restricting the development of hydraulic technology. Therefore, it is of great practical significance to improve the sealing performance and reduce the friction resistance to improve the service life of the sealing ring and the working efficiency of the cylinder. It has become a new research field to apply bionics principle and drag reduction technology to rubber ring sealing technology to reduce friction resistance and save energy between sealing contact objects. In this paper, from the view of bionics, the non-smooth surface morphology of Huangyuanzhen dragon lice and the piston cylinder sealing ring are taken as the biological prototype, and the piston cylinder sealing ring is taken as the research object. The physical model and numerical analysis model of seal and drag reduction characteristics of non-smooth surface seal ring with bionic pit triangle combination are established. The sealing properties of smooth and non-smooth rubber sealing rings were calculated by ABAQUS software, and the deformation and stress distribution of the rings under different compression quantities were analyzed. The calculated results show that when the compression ratio is 20, the effective stress of the smooth and non-smooth surface sealing rings is up to 3.5 MPa of the cylinder working pressure, which satisfies the sealing performance of the cylinder sealing ring. The drag reduction characteristics of the non-smooth surface seal ring with bionic pit triangle combination are studied, the motion parameters and initial conditions of the model are determined, and the effects of different pit sizes on the drag reduction performance of the non-smooth surface are studied. At the same time, the influence of piston motion speed on drag reduction performance is also analyzed. The results show that the drag reduction rate reaches the maximum when the diameter of the piston is 1.5mm, and the drag reduction rate increases with the increase of initial velocity when the diameter of the pit is constant. When the velocity is 0.6m/s, the non-smooth surface has better drag reduction effect. Finally, the fluid-solid coupling analysis of the oil storage pit of the seal ring is carried out by LS-DYNA software, and a reasonable numerical calculation model is established, and the dynamic analysis of the lubricating oil level stored at the bottom of the pit is carried out. The effect of oil storage pits on the lubricating properties of rubber sealing ring and cylinder contact surface was studied. The results show that the reasonable non-smooth contact surface can reduce the friction resistance of the sealing ring to a certain extent and reduce the drag.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TH137.51

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