發(fā)布時(shí)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(yàn)機(jī) 動(dòng)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(jī)中最重要的一對(duì)摩擦副,對(duì)發(fā)動(dòng)機(jī)的動(dòng)力性、經(jīng)濟(jì)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(dòng)機(jī)總機(jī)械損失的45%-65%。由此可見,研究活塞環(huán)-缸套這對(duì)摩擦副對(duì)提高發(fā)動(dòng)機(jī)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(duì)摩擦副的實(shí)際工況較為復(fù)雜,高溫、動(dòng)載荷、大行程、潤(rùn)滑條件不足等因素都對(duì)其磨損和失效造成不可忽視的影響。因此,研制一臺(tái)能更好模擬實(shí)際工況的試驗(yàn)機(jī)就顯得尤為重要�，F(xiàn)有的活塞環(huán)-缸套試驗(yàn)機(jī)對(duì)工況的模擬都不全面,尤其是對(duì)于氣缸缸壓變化帶來的徑向動(dòng)載荷都沒有考慮,是共有的不足。 針對(duì)現(xiàn)有活塞環(huán)-缸套試驗(yàn)機(jī)存在的不足之處,本文利用AutoCAD、Solid Workss、ANSYS等計(jì)算機(jī)輔助設(shè)計(jì)軟件設(shè)計(jì)了試驗(yàn)機(jī)的機(jī)械結(jié)構(gòu),該試驗(yàn)機(jī)的往復(fù)運(yùn)動(dòng)行程為90mm,往復(fù)運(yùn)動(dòng)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(shí)現(xiàn)了動(dòng)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(jì)了試驗(yàn)機(jī)的測(cè)試和控制系統(tǒng),能過對(duì)往復(fù)頻率和加熱溫度進(jìn)行精確控制,并實(shí)時(shí)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(yàn)參數(shù)。最后,基于LabVEW開發(fā)了動(dòng)態(tài)信號(hào)處理程序,用于動(dòng)態(tài)測(cè)試信號(hào)的處理和分析。 本試驗(yàn)機(jī)可以實(shí)現(xiàn)往復(fù)運(yùn)動(dòng)頻率和加熱溫度的精確控制,同時(shí)實(shí)時(shí)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(yàn)參數(shù),操作方便,界面簡(jiǎn)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(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TK403

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本文編號(hào)：1497005