Pressure chamber is a snail-shaped body pump, radial force in the deviated from the design conditions according to the following formula,
FR = 1000KHD2B2
Where FR-radial force, N;
H-head, m;
D2 - impeller outlet diameter, m;
B2 - impeller outlet width (including two cover thickness), m;
K-radial force coefficient, can be obtained by the following formula:
K = 0.36 [1- (Q '/ Q) 2]
Where Q-design flow;
Q'-actual flow rate.
When the pump is running under design conditions, according to the above formula to find the radial force coefficient is equal to zero, the maximum radial flow coefficient at zero flow,
Ie, K = 0.36. The magnitude of the coefficient K is also related to the type of pump. In some cases, the actual K value is greater than that obtained from the above formula, and K may reach 0.6 at zero flow rate
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