? ? ? ?根據(jù)離心泵性能曲線中最重要的Q-H（流量-揚程）曲線，正常工況下(發(fā)生汽蝕工況除外)，出口壓力或阻力增加，流量必然降低，反之亦然。
? ? ? ?離心泵管徑大小與流量有一定的關(guān)系，一般的是管道口徑一定的，小流量損耗的揚程低，大流量損耗的揚程大。一般的流量與管道之間的關(guān)系如下表：
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管徑/流速/流量對照表
|
管徑(DN) |
流量 m3/h |
|||||||||||||
|
0.4m/s |
0.6m/s |
0.8m/s |
1.0m/s |
1.2m/s |
1.4m/s |
1.6m/s |
1.8m/s |
2.0m/s |
2.2m/s |
2.4m/s |
2.6m/s |
2.8m/s |
3.0m/s |
|
|
20 |
0.5 |
0.7 |
0.9 |
1.1 |
1.4 |
1.6 |
1.8 |
2.0 |
2.3 |
2.5 |
2.7 |
2.9 |
3.2 |
3.4 |
|
25 |
0.7 |
1.1 |
1.4 |
1.8 |
2.1 |
2.5 |
2.8 |
3.2 |
3.5 |
3.9 |
4.2 |
4.6 |
4.9 |
5.3 |
|
32 |
1.2 |
1.7 |
2.3 |
2.9 |
3.5 |
4.1 |
4.6 |
5.2 |
5.8 |
6.4 |
6.9 |
7.5 |
8.1 |
8.7 |
|
40 |
1.8 |
2.7 |
3.6 |
4.5 |
5.4 |
6.3 |
7.2 |
8.1 |
9.0 |
10.0 |
10.9 |
11.8 |
12.7 |
13.6 |
|
50 |
2.8 |
4.2 |
5.7 |
7.1 |
8.5 |
9.9 |
11.3 |
12.7 |
14.1 |
15.6 |
17.0 |
18.4 |
19.8 |
21.2 |
|
65 |
4.8 |
7.2 |
9.6 |
11.9 |
14.3 |
16.7 |
19.1 |
21.5 |
23.9 |
26.3 |
28.7 |
31.1 |
33.4 |
35.8 |
|
80 |
7.2 |
10.9 |
14.5 |
18.1 |
21.7 |
25.3 |
29.0 |
32.6 |
36.2 |
39.8 |
43.4 |
47.0 |
50.7 |
54.3 |
|
100 |
11.3 |
17.0 |
22.6 |
28.3 |
33.9 |
39.6 |
45.2 |
50.9 |
56.5 |
62.2 |
67.9 |
73.5 |
79.2 |
84.8 |
|
125 |
17.7 |
26.5 |
35.3 |
44.2 |
53.0 |
61.9 |
70.7 |
79.5 |
88.4 |
97.2 |
106.0 |
114.9 |
123.7 |
132.5 |
|
150 |
25.4 |
38.2 |
50.9 |
63.6 |
76.3 |
89.1 |
101.8 |
114.5 |
127.2 |
140.0 |
152.7 |
165.4 |
178.1 |
190.9 |
|
200 |
45.2 |
67.9 |
90.5 |
113.1 |
135.7 |
158.3 |
181.0 |
203.6 |
226.2 |
248.8 |
271.4 |
294.1 |
316.7 |
339.3 |
|
250 |
70.7 |
106.0 |
141.4 |
176.7 |
212.1 |
247.4 |
282.7 |
318.1 |
353.4 |
388.8 |
424.1 |
459.5 |
494.8 |
530.1 |
|
300 |
101.8 |
152.7 |
203.6 |
254.5 |
305.4 |
356.3 |
407.1 |
458.0 |
508.9 |
559.8 |
610.7 |
661.6 |
712.5 |
763.4 |
|
350 |
138.5 |
207.8 |
277.1 |
346.4 |
415.6 |
484.9 |
554.2 |
623.4 |
692.7 |
762.0 |
831.3 |
900.5 |
969.8 |
1039.1 |
|
400 |
181.0 |
271.4 |
361.9 |
452.4 |
542.9 |
633.3 |
723.8 |
814.3 |
904.8 |
995.3 |
1085.7 |
1176.2 |
1266.7 |
1357.2 |
|
450 |
229.0 |
343.5 |
458.0 |
572.6 |
687.1 |
801.6 |
916.1 |
1030.6 |
1145.1 |
1259.6 |
1374.1 |
1488.6 |
1603.2 |
1717.7 |
|
500 |
282.7 |
424.1 |
565.5 |
706.9 |
848.2 |
989.6 |
1131.0 |
1272.3 |
1413.7 |
1555.1 |
1696.5 |
1837.8 |
1979.2 |
2120.6 |
|
600 |
407.1 |
610.7 |
814.3 |
1017.9 |
1221.4 |
1425.0 |
1628.6 |
1832.2 |
2035.7 |
2239.3 |
2442.9 |
2646.5 |
2850.0 |
3053.6 |
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流量：3.7-1350m3/h
揚程：49-1800m
價格：0.79-16.8萬
流量：3.7-1350m3/h
揚程：73-1800m
價格：3.05-49.8萬
流量：88-1400m3/h
揚程：10-100m
價格：0.95-20.2萬
流量：110 ~ 12020m3/h
揚程：8 ~ 140m
價格：0.79 ~ 17.8萬
