Ro-ràdh do theirmean pumpa cumanta (4) - pumpa coltach ri chèile

Lagh
Iarrtas de theòiridh coltach ri pumpa

1. Nuair a tha an lagh coltach ris a 'cur an cèill air an aon phump jane a' ruith aig diofar astaran, gheibhear e:
• Q1 / Q2 = N1 / N2
• H1 / H2 = (N1 / N2) 2
• P1 / P2 = (N1 / N2) 3
• NPSH1 / NPSH2 = (N1 / N2) 2

Eisimpleir:

Tha pumpa a th 'ann, tha am modail slw50-200b, feumaidh sinn atharrachadh slw50-200b bho 50 HZ gu 60 HZ.
(Bho 2960 RMM gu 3552 RPM)

Aig 50 Hz, tha trast-thomhas a-muigh aig an impeller de 165 mm agus ceann 36 m.

H60hz / h50hz = (n60hz / n50hz) ² = (3552/2960) 2 = (1.2) ² = 1.44
Aig 60 Hz, H60HZ = 36 × 1.44 = 51.84m.
Gus suim a dhèanamh, bu chòir do cheannard a 'phump seo 52m a ruighinn aig astar 60hz.