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The Count of Characteristic
Data of Pump Selected |
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| 以下各章均列出产品性能表，当用户根据需要在性能表中无法查得轴功率及流量时，可按如下方法近似确定： |
When you can't get the capacity power and capacity
from the characteristic table you need count it： |
| (一) 轴功率的换算 |
(一) The cowt of power |
| 1. 当压力由P变成P1而粘度、转速不变时，轴功率N：
N = (QP1/3.67η0)[1+(η0/η-1)P/P1]
(Kw)
式中: Q、P均为性能表中列出的接近用户需用要的那一组流量(m3/h)及压力值（Mpa）；
η、η0为在性能表标定的流量、压力时对应的总效率及容积效率。它们可在相应的η-P曲线图中查得。曲线均有离散性，按照"随规格的增大而取大值"
的原则进行取值。 |
1.When the pressure
is from P to P1,but viscosity and speed do not change,you
count the power N:
N =(QP1/3.67η0)[1+(η0/η-1)P/P1]
(Kw)
Note:
The Q, P is the data that you can get from characteristic
table Q(m3/h) and P(Mpa).
η,η0 is the corresponding total efficiency and
volume efficiency when the capacity and pressure is signed
by Q, P. You can get them from η-P Drawing. |
| 2. 当粘度从 E 变成 E1 而压力、转速不变时， N
= (QP/3.67η0)[1+(η0/η-1)√E1/E] (Kw)
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2. When the viscosity is from E to E1,
but the pressure and speed don't change, you can count the
power:
N = (QP/3.67η0)[1+(η0/η-1)√E1/E] (Kw)
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| 3. 转速从 n 变成 n1 时，压力、粘度不变时，轴功率
N：
N = (Qpn/3.67η0n1)[1+(η0/η-1)√n1/n] (Kw) |
3. When the speed is from n to
n1, but the pressure and viscosity don't change, you can count
the power N:
N = (Qpn/3.67η0n1)[1+(η0/η-1)√n1/n] (Kw) |
(二) 流量的换算
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(二) The count of capacity |
1. 对于粘度大于50E 的介质，当粘度从E变成 E1时，流量
Q 变为 Q1：
Q1=
Q/η0[1-(1-η0)1/K] (m3/h)
K=(√E1+1.5)/(√E+1.5)
注：η0为标定流量Q时的容积效率；
E、E1单位恩氏粘度 0E 。 |
1. When the Viscosity is from
E1 and they are more than 50E, the capacity will be form Q
to Q1:
Q1= Q/η0[1-(1-η0)1/K]
(m3/h)
K=(√E1+1.5)/(√E+1.5)
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2. 当转速从n变成n1而粘度、压力不变时，流量Q1近似为：
Q1 = Q/η0[n1/n-(1-η0)]
(m3/h) |
2.When the speed is from n to n1, but the viscosity
and pressure don't change, the capacity Q1 can
count approximately:
Q1 = Q/η0[n1/n-(1-η0)]
(m3/h) |
