| 摘要 |
<p>A turbine wheel flowmeter for liqs. is situated in a flow conduit and contains a rotor having individual rotor blades releasing individual impulses on passing by an impulse sender. The rotor blades are placed on a rotor-body provided with trunnions. Novelty consists in placing the trunnions exchangeably, under pretension, in bores inside the ends of the rotor-body. The trunnions pref. consist of a hardened steel contg. 0.85-0.95% C, 1% Si, 1% Mn, 0.045% P, 0.03% S, 17-19% Cr, 0.9-1.3% Mo, 0.07-0.12% V, balance Fe. The rotor-body pref. consists of cast steel contg. 0.2-0.27% C, =1% Si, =1% Mn, 16-18% Cr, 1-2% Ni, balance Fe. The trunnions are easily replaced on wear. Costs are reduced. Rotor-body material can be less hard than trunnion material.</p> |
