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