什么是倍率,通过倍率如何计算最大流量

发布时间:2009-12-03  点击数:5289
        将上述关系转换到不同开度(相对行程)时的流量与最大流量之比,可以获得相应的比值。表3-8和表3-9分别时线性流量特性和等百分比流量特性的调节阀在不同压降比和特定开度下计算的流量系数Kv1与额定流量系数Kv之间的倍率K。即:Kv=kKv1
       现在,我们可以根据特定开度时的流量乘以相应的倍率,就可以确定最大流量。
表3-8线性流量特性控制阀,不同压降比时的倍率k
0.05 0.10 0.15 0.2 0.25 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
10% 8.8415 8.2566 8.0522 7.9481 7.8849 7.8425 7.7892 7.7570 7.7355 7.7201 7.7085 7.6995 7.6923
20% 6.2019 5.3351 5.0130 4.8439 4.7396 4.6687 4.5786 4.5237 4.4867 4.4601 4.4400 4.4243 4.4118
30% 5.3447 4.3087 3.9028 3.6831 3.5448 3.4494 3.3265 3.2504 3.1987 3.1613 3.1329 3.1107 3.0928
40% 4.9668 3.8300 3.3668 3.1095 2.9443 2.8288 2.6775 2.5824 2.5171 2.4693 2.4329 2.4042 2.3810
50% 4.7693 3.5702 3.0680 2.7832 2.5973 2.4657 2.2904 2.1786 2.1007 2.0432 1.9990 1.9640 1.9354
60% 4.6538 3.4144 2.8853 2.5804 2.3787 2.2342 2.0392 1.9127 1.8235 1.7570 1.7054 1.6642 1.6304
70% 4.5808 3.3142 2.7659 2.4462 2.2324 2.0778 1.8665 1.7273 1.6280 1.5532 1.4946 1.4474 1.4085
80% 4.5318 3.2460 2.6839 2.3530 2.1300 1.9673 1.7426 1.5927 1.4844 1.4019 1.3367 1.2837 1.2397
90% 4.4973 3.1977 2.6253 2.2859 2.0556 1.8865 1.6509 1.4918 1.3756 1.2861 1.2147 1.1561 1.1070
100% 4.4721 3.1623 2.5820 2.2361 2.0000 1.8257 1.5811 1.4142 1.2910 1.1952 1.1180 1.0541 1.0000
表3-9等百分比流量特性控制阀,不同压降比时的倍率k
0.05 0.10 0.15 0.2 0.25 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
10% 21.791 21.560 21.483 21.444 21.421 21.405 21.386 21.374 21.366 21.361 21.356 21.353 21.351
20% 15.809 15.488 15.380 15.326 15.293 15.272 15.244 15.228 15.217 15.209 15.203 15.199 15.195
30% 11.659 11.222 11.073 10.997 10.952 10.921 10.883 10.860 10.845 10.834 10.826 10.819 10.814
40% 8.8448 8.2602 8.0559 7.9518 7.8886 7.8463 7.7930 7.7608 7.7393 7.7239 7.7124 7.7034 7.6961
50% 7.0000 6.2450 5.9722 5.8310 5.7446 5.6862 5.6125 5.5678 5.5377 5.5162 5.5000 5.4874 5.4772
60% 5.8476 4.9188 4.5674 4.3812 4.2655 4.1867 4.0859 4.0243 3.9827 3.9526 3.9300 3.9123 3.8981
70% 5.1668 4.0861 3.6555 3.4200 3.2705 3.1669 3.0325 2.9489 2.8919 2.8504 2.8189 2.7941 2.7742
80% 4.7852 3.5914 3.0927 2.8103 2.6264 2.4963 2.3234 2.2132 2.1365 2.0801 2.0367 2.0023 1.9744
90% 4.5798 3.3128 2.7642 2.4442 2.2303 2.0755 1.8640 1.7246 1.6251 1.5501 1.4914 1.4441 1.4051
100% 4.4721 3.1623 2.5820 2.2361 2.0000 1.8257 1.5811 1.4142 1.2910 1.1952 1.1180 1.0541 1.0000