發(fā)布時間：2018-02-09 03:53

  本文關(guān)鍵詞： 活塞環(huán)-缸套 摩擦磨損 往復(fù)試驗機 動態(tài)加載　出處：《合肥工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：活塞環(huán)-缸套作為內(nèi)燃機中最重要的一對摩擦副,對發(fā)動機的動力性、經(jīng)濟性、可靠性、耐久性有著極大的影響。活塞環(huán)-缸套的摩擦損失占到發(fā)動機總機械損失的45%-65%。由此可見,研究活塞環(huán)-缸套這對摩擦副對提高發(fā)動機性能,降低能量損失有著不可取代的重要作用。 活塞環(huán)-缸套這對摩擦副的實際工況較為復(fù)雜,高溫、動載荷、大行程、潤滑條件不足等因素都對其磨損和失效造成不可忽視的影響。因此,研制一臺能更好模擬實際工況的試驗機就顯得尤為重要。現(xiàn)有的活塞環(huán)-缸套試驗機對工況的模擬都不全面,尤其是對于氣缸缸壓變化帶來的徑向動載荷都沒有考慮,是共有的不足。 針對現(xiàn)有活塞環(huán)-缸套試驗機存在的不足之處,本文利用AutoCAD、Solid Workss、ANSYS等計算機輔助設(shè)計軟件設(shè)計了試驗機的機械結(jié)構(gòu),該試驗機的往復(fù)運動行程為90mm,往復(fù)運動頻率可以在0-10Hz之間無極調(diào)節(jié),試件周圍環(huán)境溫度可加熱到最高300攝氏度,徑向載荷實現(xiàn)了動態(tài)加載；利用現(xiàn)代可編程控制器、組態(tài)軟件及傳感器技術(shù)設(shè)計了試驗機的測試和控制系統(tǒng),能過對往復(fù)頻率和加熱溫度進行精確控制,并實時采集,顯示和保存摩擦力,載荷,試件表面溫度,環(huán)境溫度等試驗參數(shù)。最后,基于LabVEW開發(fā)了動態(tài)信號處理程序,用于動態(tài)測試信號的處理和分析。 本試驗機可以實現(xiàn)往復(fù)運動頻率和加熱溫度的精確控制,同時實時采集,顯示和保存載荷,摩擦力,環(huán)境溫度,試件表面溫度等試驗參數(shù),操作方便,界面簡潔,穩(wěn)定可靠。
[Abstract]:Piston ring-cylinder liner is the most important pair of friction pairs in internal combustion engine. The friction loss of piston ring and cylinder liner accounts for 45% -65% of the total mechanical loss of the engine. Thus, it can be seen that the study on the friction pair of piston ring cylinder liner can improve the performance of the engine. Reducing energy loss plays an irreplaceable role. The piston ring and cylinder liner are more complicated to the actual working conditions of friction pair. The factors such as high temperature, dynamic load, large stroke and insufficient lubrication conditions all have an important effect on the wear and failure of the friction pair. It is particularly important to develop a testing machine that can better simulate the actual working conditions. The existing piston ring and cylinder liner test machines do not fully simulate the operating conditions, especially for the radial dynamic load caused by the change of cylinder pressure. Is a common deficiency. In view of the shortcomings of the existing piston ring cylinder liner testing machine, the mechanical structure of the testing machine is designed by using the CAD software, such as AutoCAD solid work ANSYS, etc. The reciprocating stroke of the tester is 90 mm, the frequency of reciprocating motion can be adjusted in the range of 0-10 Hz, the ambient temperature of the specimen can be heated to a maximum of 300 degrees Celsius, the radial load is dynamically loaded, and the modern programmable controller is used. Configuration software and sensor technology have designed the test and control system of the testing machine, which can accurately control the reciprocating frequency and heating temperature, and can collect, display and store the friction force, load and surface temperature of the specimen in real time. Finally, a dynamic signal processing program based on LabVEW is developed for dynamic signal processing and analysis. This testing machine can realize the accurate control of reciprocating motion frequency and heating temperature. At the same time, it can collect, display and save the load, friction force, environment temperature, sample surface temperature and other test parameters in real time. The operation is convenient, the interface is simple, and the interface is stable and reliable.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TK403

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本文編號：1497005