本文選題：活塞式壓縮機(jī) + 舌簧排氣閥　； 參考：《西安交通大學(xué)學(xué)報(bào)》2017年09期

【摘要】：為了揭示壓縮機(jī)舌簧閥啟閉運(yùn)動(dòng)失效過(guò)程及其影響因素,建立了閥片運(yùn)動(dòng)的單質(zhì)點(diǎn)模型和懸臂梁模型,在單質(zhì)點(diǎn)模型中,綜合考慮了閥片的有效工作長(zhǎng)度、彈力、質(zhì)量隨位移變化的關(guān)系,在Matlab環(huán)境下,采用四階龍格-庫(kù)塔法計(jì)算程序?qū)?種模型進(jìn)行了求解。為了驗(yàn)證模型的有效性,建立了舌簧排氣閥位移測(cè)量實(shí)驗(yàn)系統(tǒng),并將測(cè)量結(jié)果與2種模型的計(jì)算結(jié)果進(jìn)行了比較,結(jié)果表明,單質(zhì)點(diǎn)模型相比懸臂梁模型能更準(zhǔn)確地反映舌簧排氣閥的運(yùn)動(dòng)規(guī)律。利用單質(zhì)點(diǎn)模型分析了氣閥升程、閥片厚度以及閥孔直徑對(duì)舌簧閥動(dòng)態(tài)特性的影響,分析結(jié)果表明:閥片升程增加,舌簧排氣閥的初始關(guān)閉角減小,最大沖擊速度增大;閥片厚度增大,對(duì)初始開(kāi)啟角影響不大,但初始關(guān)閉角提前;排氣閥口直徑減小,閥片開(kāi)啟、關(guān)閉時(shí)間延遲,壓縮機(jī)能效比降低。該研究可為舌簧閥組結(jié)構(gòu)參數(shù)選擇、優(yōu)化設(shè)計(jì)提供參考。
[Abstract]:In order to reveal the movement failure process of the tongue spring valve of compressor and its influencing factors, the single mass point model and the cantilever beam model of the valve plate motion are established. In the simple mass point model, the effective working length and elastic force of the valve plate are considered synthetically. The relationship between mass and displacement is solved by using the fourth order Runge-Kutta method in Matlab. In order to verify the validity of the model, an experimental system for measuring the displacement of the tongue spring exhaust valve is established, and the measured results are compared with the calculated results of the two models. The results show that, Compared with the cantilever beam model, the single mass point model can more accurately reflect the movement of the tongue spring exhaust valve. The effects of valve lift, valve thickness and valve hole diameter on the dynamic characteristics of tongue spring valve are analyzed by using the single mass point model. The results show that the initial closing angle of the valve increases with the increase of the valve plate lift, and the maximum impact velocity increases. The increase of valve thickness has little effect on the initial opening angle, but the initial closing angle is advanced; the exhaust valve diameter decreases, the valve opening time is delayed, and the compressor energy efficiency ratio decreases. This study can be used as a reference for the selection of structural parameters and optimization design of the tongue spring valve group.
【作者單位】： 大連交通大學(xué)機(jī)械工程學(xué)院;大連海洋大學(xué)機(jī)械與動(dòng)力工程學(xué)院;大連交通大學(xué)動(dòng)車學(xué)院;大連交通大學(xué)交通運(yùn)輸工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51205035) 遼寧省自然科學(xué)基金資助項(xiàng)目(201602133,20170540107) 遼寧省教育廳科學(xué)研究一般項(xiàng)目(L2013280)
【分類號(hào)】：TB652

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