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不工作時(shí)，減壓閥閥口常開;溢流閥閥口常閉
4)減壓閥泄油單獨(dú)回油箱，而溢流閥泄油是內(nèi)部回油。
16順序閥與溢流閥使用時(shí)的主要區(qū)別是什么?
出口接負(fù)載的順序閥與溢流閥的動(dòng)作原理相似，其主要區(qū)別是:
(1)順序閥的出油口接負(fù)載，溢流閥的出口接油箱;
(2)順序閥的泄油口單獨(dú)接回油箱，益流閥的泄油口與出油口相通;
(3)順序閥的進(jìn)出口壓力差由負(fù)載工況來(lái)定，進(jìn)口壓力升高時(shí)閥口將不斷增大
直致全開，出口壓力對(duì)負(fù)載作功;
4)益流閥的進(jìn)口壓力由調(diào)壓彈簧限定，溢流全部回油箱，損失能童。
17，調(diào)速閥的穩(wěn)流工作原理是什么?其與普通節(jié)流閥有何區(qū)別?
(穩(wěn)流原理請(qǐng)同學(xué)對(duì)著調(diào)速閥圖自行分析)
普通節(jié)流閥所通過的流里大小可以調(diào)節(jié)，但受節(jié)流閥前后的壓較大，
流里穩(wěn)定性差(速度剛性差);而調(diào)速閥中的定差減壓閥能自動(dòng)保持節(jié)流閥前后壓
差基本不變，故而通過調(diào)速閥的流里不受負(fù)載變化影響，流里穩(wěn)定性好(速度剛
性好)
18，調(diào)速閥與溢流節(jié)流閥的主要區(qū)別是什么?
1)調(diào)速閥是節(jié)流閥與減壓閥串聯(lián)而成，而溢流節(jié)流閥是節(jié)流閥與減壓閥并聯(lián)
而成.
2)益流節(jié)流閥只能裝在進(jìn)油路，而調(diào)速閥可裝在進(jìn),回油路上.
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