水温对水环真空泵性能的影响.doc

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1、水温对水环式真空泵性能的影响水环真空泵的水温对其性能影响较大，而水环真空泵的性能曲线均为在15℃的水温条件下测得，因此在实际选用水环真空泵时应对水环真空泵的抽气速率进行修正。水环泵的实际抽速可根据Qt=Q15K，K＝（P1-Pt）/（P1-P15）计算修正值，其中：Qt-水温为t℃时的气量m3/minQ15-水温为15℃时的气量m3/minP1-水环泵的吸入压力mmHgPt-水温为t℃时的饱和蒸汽压力mmHgP15-水温为15℃时的饱和蒸汽压力mmHgK－气量修正系数水环真空泵在各种温度及吸入压力下的K值可参照下表水温℃

2、吸入压力mmHg2530354050608010012015020025030040050060076001.6851.4861.3761.3071.2251.1771.1241.0961.0781.0611.0451.0351.0291.0221.0171.0141.01121.6271.4451.3451.2811.2061.1621.1141.0881.0711.0561.0411.0321.0271.021.0161.0131.0141.5611.3981.3081.2521.1841.1451.1021.079

3、1.0641.051.0371.0291.0241.0181.0141.0121.00961.4871.3451.2681.2181.161.1261.0881.0681.0551.0431.0321.0251.0211.0151.0121.011.00881.4031.2861.2211.1811.1321.1041.0731.0561.0461.0361.0261.0211.0171.0131.011.0081.007101.3081.2191.1691.1381.1011.081.0561.0431.0351.02

4、71.021.0161.0131.011.0081.0061.005121.2011.1431.1111.091.0661.0521.0371.0281.0231.0181.0131.011.0091.0061.0051.0041.003141.0811.0571.0451.0361.0271.0211.0151.0111.0091.0071.0051.0041.0031.0031.0021.0021.001160.9460.9620.970.9760.9820.9860.990.9920.9940.9950.9960.

5、9970.9980.9980.9990.9990.999180.7950.8550.8880.9080.9330.9470.9630.9710.9770.9820.9870.9890.9910.9940.9950.9960.997200.6270.7350.7950.8330.8780.9040.9320.9480.9580.9670.9760.9810.9840.9880.9910.9920.994210.5360.6710.7450.7920.8480.880.9160.9350.9470.9590.970.9760

6、.980.9850.9880.990.992220.4390.6020.6920.7480.8160.8550.8980.9220.9360.950.9630.9710.9760.9820.9860.9880.991230.3370.530.6360.7030.7830.8290.880.9070.9250.9410.9570.9660.9720.9790.9830.9860.989240.230.4540.5770.6550.7470.8010.860.8920.9120.9320.950.960.9670.9760.

7、9810.9840.987250.1170.3740.5150.6040.710.7720.840.8760.8990.9210.9420.9550.9620.9720.9780.9820.9862600.2890.4490.550.6710.7410.8180.860.8860.9110.9350.9480.9570.9680.9750.9790.98427－0.20.380.4940.630.7080.7950.8420.8720.90.9260.9420.9520.9640.9720.9770.98228－0.10

8、60.3080.4350.5870.6740.7710.8240.8570.8880.9180.9350.9460.960.9680.9740.97929－0.0080.2310.3720.5410.6380.7460.8040.8410.8760.9090.9280.9410.9560.9650.9710.9773