valve n. 1.【機(jī)械工程】閥,活門,舌門;汽門。 2.【解剖學(xué);動物學(xué)】瓣,瓣膜;(貝)殼瓣;【植物;植物學(xué)】莢片;(藻的)瓣;(果實(shí)的)裂片。 3.【建筑】門的一扇。 4.〔英國〕【無線電】電子管,真空管。 a change valve 三通閥。 an exhaust valve排氣閥。 a pulmonary valve【解剖學(xué)】肺動脈瓣。 a safety valve安全閥,保險(xiǎn)閥。 adj. -d 有閥[瓣等]的。 adj. -less 無閥[瓣等]的。 n. -let 小閥[瓣等]。
Life is the main factor restricting air valve and spring - loaded valves quality , the general long - term continuous operation of the compressors to life 80 hours ; for mobile , short - term or intermittent operation of compressors , may require slightly more 限制氣閥壽命的主要因素是閥片及彈簧質(zhì)量,一般對長期連續(xù)運(yùn)轉(zhuǎn)的壓縮機(jī),希望壽命達(dá)8000小時(shí)以上;對移動式、短期或間歇運(yùn)轉(zhuǎn)的壓縮機(jī),要求可稍低些。
Servo loading valve is the pivotal part of the system , it is designed again in this thesis , the mathematical model of the system and its control parts was established and built . the author deduced how the system parameters and control method influence the system dynamic state through theoretical analysis of the system . in addition , the dissertation introduces how to carry out protection in event of sudden break down of the system 伺服加載閥為整個系統(tǒng)的關(guān)鍵元件,論文進(jìn)行了加載閥的設(shè)計(jì),其性能指標(biāo)達(dá)到了理想要求,并完成了對系統(tǒng)關(guān)鍵元件及整個加載系統(tǒng)進(jìn)行了建模與仿真,通過理論分析導(dǎo)出了系統(tǒng)結(jié)構(gòu)參數(shù)和控制方法對系統(tǒng)動態(tài)性能及加載精度的影響,并進(jìn)行了系統(tǒng)誤差分析。