【摘要】：雷達是機載電子設備的核心,通過雷達探測為載機火控系統(tǒng)獲取敵我目標的準確位置和速度信息,從而實現(xiàn)對既定目標及時的跟蹤或精確打擊。由于探測的需要,需借助液壓伺服馬達實現(xiàn)天線按一定速度運轉(zhuǎn)和調(diào)整姿態(tài)。由于結(jié)構(gòu)空間的限制,在密封設計上應用O形密封圈溝槽結(jié)構(gòu)來保證液壓伺服馬達密封。根據(jù)載機所使用的10號或15號航空液壓油,常用耐航空液壓油的5080丁腈橡作膠作為液壓馬達的密封件材料。某雷達液壓伺服系統(tǒng)與飛機起落架系統(tǒng)直接連接,雷達密封性直接決定飛機液壓系統(tǒng)安全,因此對該雷達液壓系統(tǒng)的外部滲漏具有嚴格規(guī)定,要求雷達在正常工作30分鐘內(nèi)密封結(jié)合表面無油滴滴落。而GJB2189-94中對單位飛機定量液壓馬達要求為馬達連續(xù)工作60min內(nèi),泄漏量不大于5ml,因此對雷達液壓系統(tǒng)中液壓伺服馬達的密封性能要求明顯高于國軍標中的相關(guān)密封性能要求。本文首先使用大型有限元分析軟件,依據(jù)液壓伺服馬達工作油壓、背壓環(huán)境和安裝間隙等典型條件,研究液壓馬達中O形橡膠密封圈的內(nèi)應力和接觸壓力規(guī)律,并通過正交試驗,對有限元分析結(jié)果進行了驗證。然后,加工和設計了系列調(diào)整墊片,進行了間隙密封壓差試驗,并測試了馬達密封結(jié)構(gòu)的內(nèi)漏與壓差。最后,對加工和設計的液壓伺服馬達進行了低溫密封試驗和長周期壽命試驗,試驗結(jié)果表明,馬達密封性能滿足要求。
[Abstract]:Radar is the core of airborne electronic equipment. The accurate position and velocity information of the target is obtained by radar detection for the onboard fire control system, so that the target can be tracked or struck accurately in time. Because of the need of detection, it is necessary to use hydraulic servo motor to realize the antenna running at a certain speed and adjusting the attitude. Due to the limitation of structure space, O-ring groove structure is applied to seal design to ensure hydraulic servo motor seal. According to the aviation hydraulic oil No. 10 or No. 15, the rubber of 5080 butadiene rubber is used as the sealing material of hydraulic motor. The radar hydraulic servo system is directly connected with the aircraft landing gear system, and the radar seal directly determines the safety of the aircraft hydraulic system, so the external leakage of the radar hydraulic system is strictly regulated. The radar is required to seal off the oil-free drop on the surface within 30 minutes of normal operation. However, the quantitative hydraulic motor of unit aircraft in GJB2189-94 is required to work continuously in 60min, and the leakage is not greater than 5 ml, so the sealing performance of hydraulic servo motor in radar hydraulic system is obviously higher than that in the national military standard. In this paper, the internal stress and contact pressure of O-shaped rubber seal ring in hydraulic motor are studied according to the typical conditions of hydraulic servo motor, such as working oil pressure, back pressure environment and installation clearance, by using large-scale finite element analysis software. The results of finite element analysis are verified by orthogonal test. Then, a series of adjusting gaskets are processed and designed, the clearance seal pressure difference test is carried out, and the internal leakage and pressure difference of the motor seal structure are tested. Finally, the low temperature seal test and long cycle life test of the hydraulic servo motor are carried out. The experimental results show that the sealing performance of the motor meets the requirements.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN957

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本文編號：2168818