【摘要】：液壓系統(tǒng)泄漏的原因各式各樣,泄漏的部位也很多,必須要從設(shè)計到制造元件的工藝過程,以及裝配流程進行泄漏控制。為了控制液壓系統(tǒng)的泄漏還得從控制液壓元件的泄漏量出發(fā)。 本文所做的工作為： 1.查閱國內(nèi)外資料,分析國內(nèi)外液壓系統(tǒng)泄漏控制研究現(xiàn)狀,了解液壓系統(tǒng)泄漏情況,每年泄漏的油液不僅造成環(huán)境污染,并且浪費資源,對系統(tǒng)的泄漏控制需要從控制液壓元件的泄漏著手。 2.查閱相關(guān)流體力學方面的知識,介紹了液壓元件常見的四種泄漏形式(縫隙泄漏、多孔隙泄漏、粘附泄漏、動力泄漏),并總結(jié)各種縫隙泄漏量的計算公式。 3.液壓元件的泄漏控制措施有密封件結(jié)構(gòu)的泄漏控制和間隙密封泄漏控制,帶密封件密封裝置可以對靜密封實現(xiàn)零泄漏,但是磨損嚴重,不易散熱,需要定期更換密封件。間隙密封為相對運動的元件之間的微小縫隙形成很高的流阻從而達到對液壓元件的泄漏控制,缺點對元件的加工精度要求高。 4.本文針對目前液壓系統(tǒng)的泄漏情況,對液壓缸活塞間隙泄漏進行實驗,對旋轉(zhuǎn)接頭的泄漏控制進行建模仿真。本文采用Gambit對旋轉(zhuǎn)接頭進行建模,并進行網(wǎng)格劃分,然后把模型導入流體仿真軟件Fluent進行仿真。對仿真結(jié)果進行分析,提出元件的泄漏控制措施。
[Abstract]:The reasons of hydraulic system leakage are various and there are many parts of leakage. It is necessary to control the leakage from design to manufacture process and assembly process. In order to control the leakage of hydraulic system, it is necessary to control the leakage of hydraulic components. The work done in this paper is as follows: 1. Referring to domestic and foreign data, analyzing the present situation of hydraulic system leakage control research at home and abroad, understanding the leakage situation of hydraulic system, the oil leaked every year not only causes environmental pollution, but also wastes resources. The leakage control of the system should begin with the control of the leakage of the hydraulic components. 2. Referring to the relevant knowledge of fluid mechanics, this paper introduces four common leakage forms of hydraulic components (crevice leakage, porous leakage, adhesion leakage, dynamic leakage), and summarizes the calculation formulas of various crevice leakage. The leakage control measures of hydraulic components include leakage control of seal structure and leakage control of clearance seal. Sealing device with seal can realize zero leakage to static seal, but it is not easy to dissipate heat due to serious wear, so it is necessary to replace seal regularly. The clearance seal is a small gap between the moving components to form a very high flow resistance to control the leakage of the hydraulic components, and the shortcomings require high machining accuracy of the components. 4. Aiming at the leakage of hydraulic system at present, the experiment of piston clearance leakage of hydraulic cylinder is carried out, and the leakage control of rotary joint is modeled and simulated. In this paper, Gambit is used to model the rotary joint, and the mesh is divided, then the model is imported into the fluid simulation software fluent for simulation. The simulation results are analyzed and the leakage control measures are proposed.
【學位授予單位】：武漢科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TH137.5

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