【摘要】：加載平臺是液壓缸試驗臺的重要組成部分,臺架和滑車機構(gòu)是加載平臺的兩個重要組成部分。本文對加載平臺的臺架和滑車中的關(guān)鍵零件進行了一系列的有限元結(jié)構(gòu)分析,整體的臺架結(jié)構(gòu)由左臺架、左中臺架、右中臺架、右臺架、支架和中支架等部件組成,臺架主要是用于承載和安裝加載缸和滑車等零部件,其結(jié)構(gòu)和受力狀況比較復(fù)雜�；囍饕怯苫嚰�,拉壓力傳感器,銷軸等零部件組成,它使試驗缸和加載缸能夠平穩(wěn)的通過拉壓力傳感器來實現(xiàn)對頂連接,由于在液壓缸試驗的過程中加載平臺受到的應(yīng)力比較大,避免不了發(fā)生滑車的疲勞破壞,進而導(dǎo)致企業(yè)在生產(chǎn)和試驗中蒙受很大的損失。因此,針對滑車和臺架中的關(guān)鍵部件的設(shè)計顯得十分重要,同時在提高加載平臺的可靠性和使用壽命方面也具有一定的實際意義。 本文應(yīng)某液壓缸廠家的要求,對加載平臺中的臺架和滑車等關(guān)鍵零部件進行有限元結(jié)構(gòu)分析。分析了加載平臺的結(jié)構(gòu)特點,首先運用Pro/E軟件分別對加載平臺的臺架和滑車做了實體建模,利用軟件間的接口導(dǎo)入技術(shù),達到數(shù)據(jù)共享;根據(jù)有限元離散化理論,依次建立有限元模型,進行網(wǎng)格劃分,施加邊界條件和定義載荷,最后通過計算獲得分析結(jié)果。根據(jù)得到的分析結(jié)果,通過強度理論對臺架和滑車中的關(guān)鍵零件進行結(jié)構(gòu)強度校核,不僅獲得了應(yīng)力和應(yīng)變的分布情況,且清晰確定了破壞易損區(qū)域。當臺架和滑車的最大應(yīng)力遠低于材料的許用應(yīng)力并完全滿足強度要求的前提下,適當減小臺架和滑車的厚度,以節(jié)約材料減輕機身重量。分析了產(chǎn)生疲勞破壞的原因,保證了設(shè)計的合理性和可靠性。該方法提高了加載平臺設(shè)計效率,降低了加載平臺設(shè)計與制造成本。值得提出的是,實際工作情況與本文的有限元分析結(jié)果十分吻合。因此,本文在理論分析上是客觀可信的,且對實際的試驗和生產(chǎn)過程都具有一定的指導(dǎo)意義。
[Abstract]:The loading platform is an important part of the hydraulic cylinder test bench, and the platform and the pulley mechanism are two important parts of the loading platform. In this paper, a series of finite element structural analysis is carried out on the platform and the key parts in the pulley. The overall structure of the platform is composed of the left stand, the left center stand, the right stand, the support and the middle support. The bench is mainly used to load and install load cylinder and pulley parts, its structure and mechanical condition are complex. The pulley is mainly composed of the pulley frame, pull pressure sensor, pin shaft and other parts. It enables the test cylinder and the loading cylinder to smoothly connect the top through the pull pressure sensor. Due to the large stress of loading platform in the process of hydraulic cylinder test, the fatigue failure of the pulley can not be avoided, and then the enterprise suffers great losses in production and test. Therefore, it is very important to design the key components of the pulley and the bench, and it is also of practical significance to improve the reliability and service life of the loading platform. At the request of a hydraulic cylinder manufacturer, this paper analyzes the finite element structure of the key parts of the loading platform, such as the bench and the pulley. The structural characteristics of the loading platform are analyzed. Firstly, Pro/E software is used to model the platform and the pulley, and the interface technology between the software is used to achieve data sharing. According to the theory of finite element discretization, the finite element model is established in turn, the mesh is divided, the boundary condition is applied and the load is defined. Finally, the analysis results are obtained by calculation. According to the results obtained, the structural strength of the key parts in the bench and the pulley is checked by the strength theory, not only the distribution of stress and strain is obtained, but also the region of failure is clearly determined. When the maximum stress of the platform and the pulley is far lower than the allowable stress of the material and fully meets the requirements of the strength, the thickness of the bench and the pulley is reduced appropriately, so as to save the material and reduce the weight of the fuselage. The causes of fatigue failure are analyzed to ensure the rationality and reliability of the design. This method improves the efficiency of loading platform design and reduces the cost of loading platform design and manufacturing. It is worth mentioning that the actual working conditions are in good agreement with the finite element analysis results in this paper. Therefore, this paper is objective and credible in theoretical analysis, and has certain guiding significance to the actual test and production process.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH137.51

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