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(zhuǎn)速

Equivalent speed

電機轉(zhuǎn)次吸2次氣

Two suctions and discharges in a turn

電機轉(zhuǎn)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(zhuǎn)子比二葉轉(zhuǎn)子的優(yōu)勢：1、抽氣性能高：同等轉(zhuǎn)速下，二葉羅茨真空泵轉(zhuǎn)一圈抽2次氣，三葉羅茨真空泵轉(zhuǎn)一圈則抽3次氣，性能提高很明顯；2、溫升?。和葔翰钕?，假設(shè)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(jié)構(gòu)差異，壓縮比大；5、震動小、穩(wěn)定性高；6，泵內(nèi)拆裝無需密封硅膠，全采用O型圈密封。