本文選題：滑環(huán)式組合密封 + 旋轉(zhuǎn)軸密封��； 參考：《上海交通大學(xué)》2014年碩士論文

【摘要】：在航天產(chǎn)品的研制生產(chǎn)中,經(jīng)常需要在通高壓氣體的情況進行高速旋轉(zhuǎn),隨著技術(shù)水平的提升,要求的高壓氣體壓力和旋轉(zhuǎn)速度不斷提高,對用于測試的設(shè)備在高速高壓下的旋轉(zhuǎn)軸密封的可靠性、安全性等都提出了較高的要求。因此,研究高速高壓旋轉(zhuǎn)條件下的密封結(jié)構(gòu)非常必要,同時也對航天產(chǎn)品的發(fā)展具有重要意義。為此,論文針對實際工況要求,對兩種基于改性PTFE材料的滑環(huán)式組合密封圈在高速高壓旋轉(zhuǎn)條件下的密封性能進行了研究。設(shè)計了組合密封圈的密封結(jié)構(gòu),建立了計算模型和有限元模型,對兩種滑環(huán)式組合密封圈進行了有限元分析。結(jié)果表明:齒形滑環(huán)式組合密封圈最大接觸應(yīng)力受O形密封圈預(yù)壓縮量和氣壓影響大;方形滑環(huán)式組合密封圈最大接觸應(yīng)力位于O形密封圈和滑環(huán)接觸面上,滑環(huán)與旋轉(zhuǎn)軸接觸應(yīng)力受O形密封圈預(yù)壓縮量和氣壓影響小,高壓下最大接觸應(yīng)力偏離中心,易導(dǎo)致摩擦接觸面受力不均而損壞。設(shè)計了高速高壓旋轉(zhuǎn)軸密封性能試驗裝置。介紹了試驗裝置的組成和原理,設(shè)計了試驗裝置中關(guān)鍵零件、控制系統(tǒng)和高壓氣源充氣裝置,確定了測試用密封圈型號尺寸。進行了高速高壓磨損性能試驗。通過對試驗密封圈在不同轉(zhuǎn)速、不同氣體壓力和不同O形密封圈預(yù)壓縮量條件下的定時試驗,分析了各因素對試驗結(jié)果的影響程度。結(jié)果表明:兩種測試密封圈在低壓低速條件下密封性能相差不大,在高壓高速條件下,齒形滑環(huán)式組合密封圈密封性能更優(yōu)。進行了壽命試驗。在35MPa氣體壓力和1200rpm轉(zhuǎn)速條件下,考核了兩種測試密封圈的密封壽命。結(jié)果表明:在高速高壓旋轉(zhuǎn)條件下,齒形滑環(huán)式組合密封圈密封壽命近3倍于方形滑環(huán)式組合密封圈。齒形滑環(huán)式組合密封圈的試驗壽命大于實際工作中使用的特種橡膠O形密封圈的密封壽命,因此,齒形滑環(huán)式組合密封圈完全可以替代現(xiàn)有密封方式,該組合密封的應(yīng)用可以大大提高設(shè)備的可靠性,為航天產(chǎn)品研制生產(chǎn)提供測試保障條件。
[Abstract]:In the development and production of aerospace products, it is often necessary to rotate at high speed in the case of high pressure gas. With the improvement of technology level, the required high pressure gas pressure and rotating speed are constantly raised. The reliability and safety of rotary shaft seal for testing equipment under high speed and high pressure are put forward. Therefore, it is necessary to study the sealing structure under the condition of high speed and high pressure rotation, and it is also of great significance to the development of aerospace products. For this reason, the sealing performance of two kinds of sliding ring combined sealing rings based on modified PTFE materials under high speed and high pressure rotating conditions is studied in this paper. The sealing structure of the combined seal ring is designed, the computational model and the finite element model are established, and the finite element analysis of the two kinds of sliding ring combined seal rings is carried out. The results show that the maximum contact stress of the toothed slip-ring combined sealing ring is greatly affected by the pre-compression volume and the pressure of the O-shaped seal ring, and the maximum contact stress of the square slip-ring combined seal ring is located on the contact surface between the O-shaped seal ring and the sliding ring. The contact stress between the sliding ring and the rotary shaft is less affected by the precompression and pressure of the O-shaped seal ring, and the maximum contact stress deviates from the center under high pressure, which can easily lead to the uneven force on the friction contact surface and damage. A high-speed and high-pressure rotary shaft seal test device is designed. This paper introduces the composition and principle of the test device, designs the key parts of the test device, the control system and the inflatable device of high pressure gas source, and determines the size of the sealing ring for testing. High-speed and high-pressure wear performance tests were carried out. The influence of various factors on the test results was analyzed through the timing test of the test ring under the conditions of different rotational speed, different gas pressure and different O shape seal ring precompression shrinkage. The results show that the seal performance of the two test rings is not different at low pressure and low speed, but the seal performance of the gear slip ring combined seal is better under the condition of high pressure and high speed. Life test was carried out. Under the condition of 35MPa gas pressure and 1200rpm speed, the sealing life of two kinds of test rings was tested. The results show that under the condition of high speed and high pressure rotation, the seal life of the toothed slip-ring combined seal is 3 times longer than that of the square sliding ring. The experimental life of the toothed slip-ring combined seal ring is longer than that of the special rubber O-shaped seal ring used in practical work. Therefore, the toothed slip-ring combined seal ring can completely replace the existing sealing method. The application of the combined seal can greatly improve the reliability of the equipment and provide a test guarantee for the development and production of aerospace products.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB42;V423

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本文編號：1932132