項目ITEM
條件
TESTING CONDITION
ZJ300二葉羅茨真空泵
ZJ300 Bi-lobe Roots vacuum pump
ZJ300三葉羅茨真空泵
ZJ300 Tri-lobe Roots vacuum pump
抽氣性能
Pumping performance
同等轉速
Equivalent speed
電機轉次吸2次氣
Two suctions and discharges in a turn
電機轉一次吸3次氣
Three suctions and discharges in a turn
溫升
Temperature rise
同等壓差
Equivalent pressure
50-60C
25-35C
允許極限壓差
Allowable limit pressure difference
同等工況
Equivalent working condition
6000- 8000pa
10000- 12000pa
密封性能
Sealing performance
同等工作真空
Equivalent working vacuum
兩個密封點
Two sealing points
三個密封點
Three sealing points
壓縮比
Compression ratio
大氣壓下
Atmospheric pressure
5~6
8.5-9
機械性能
Mechanical performance
同等工況，三葉羅茨真空泵抽氣效率高、穩(wěn)定性好、 振動小、噪音低 Under the equivalent conditions,Tri-lobe Roots pump has higher pumping efficiency,better stability,lessvibration and noise.
三葉轉子比二葉轉子的優(yōu)勢：1、抽氣性能高：同等轉速下，二葉羅茨真空泵轉一圈抽2次氣，三葉羅茨真空泵轉一圈則抽3次氣，性能提高很明顯；2、溫升?。和葔翰钕拢僭O二葉羅茨真空泵溫升為50℃，那么三葉羅茨真空泵則只有30~35℃，溫升只有二葉羅茨真空泵的60~70%；3、壓差高：三葉羅茨真空泵可以達到120KPa的壓差，而二葉羅茨真空泵只能達到50KPa的壓差；4、壓縮比大：由于三葉羅茨真空泵與二葉羅茨真空泵的結構差異，壓縮比大；5、震動小、穩(wěn)定性高；6，泵內拆裝無需密封硅膠，全采用O型圈密封。
