项目ITEM
条件
TESTING CONDITION
ZJ300二叶罗茨真空泵
ZJ300 Bi-lobe Roots vacuum pump
ZJ300三叶罗茨真空泵
ZJ300 Tri-lobe Roots vacuum pump
抽气性能
Pumping performance
同等转速
Equivalent speed
电机转次吸2次气
Two suctions and discharges in a turn
电机转一次吸3次气
Three suctions and discharges in a turn
温升
Temperature rise
同等压差
Equivalent pressure
50-60C
25-35C
允许极限压差
Allowable limit pressure difference
同等工况
Equivalent working condition
6000- 8000pa
10000- 12000pa
密封性能
Sealing performance
同等工作真空
Equivalent working vacuum
两个密封点
Two sealing points
三个密封点
Three sealing points
压缩比
Compression ratio
大气压下
Atmospheric pressure
5~6
8.5-9
机械性能
Mechanical performance
同等工况,三叶罗茨真空泵抽气效率高、稳定性好、 振动小、噪音低 Under the equivalent conditions,Tri-lobe Roots pump has higher pumping efficiency,better stability,lessvibration and noise.
三叶转子比二叶转子的优势:1、抽气性能高:同等转速下,二叶罗茨真空泵转一圈抽2次气,三叶罗茨真空泵转一圈则抽3次气,性能提高很明显;2、温升小:同等压差下,假设二叶罗茨真空泵温升为50℃,那么三叶罗茨真空泵则只有30~35℃,温升只有二叶罗茨真空泵的60~70%;3、压差高:三叶罗茨真空泵可以达到120KPa的压差,而二叶罗茨真空泵只能达到50KPa的压差;4、压缩比大:由于三叶罗茨真空泵与二叶罗茨真空泵的结构差异,压缩比大;5、震动小、稳定性高;6,泵内拆装无需密封硅胶,全采用O型圈密封。
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