| 摘要 |
FIELD: physics. ^ SUBSTANCE: invention is meant for measuring flow rate of fluid media, particularly water. In the channel (4) of a housing (1) there is a turbine (10) with a hub (11) and several radial blades (12.1, 12.2) and a holding insert (20) consisting of a crosshead guide (20.1) and the main body (20.2) of the insert. The crosshead guide (20.1) has a hub (21) and radial braces (22), a nozzle housing (23) which surrounds the front (14) of the turbine (10). The blades (12.1, 12.2) of the turbine (10) lie near the nozzle housing (23). A nozzle ring (16) joins the blades (12.1, 12.2) and encircles the outer contour of the nozzle housing (23) with formation of a nozzle gap (18) which is linked to the gap (17) between the nozzle housing (23) and the front (14) of the turbine. A device (30) serves for connecting the turbine to counter measuring mechanism (5). The gap (17) and the nozzle gap (18) direct the fluid medium such that the turbine begins to rotate at minimum flow rate of the media and retains its position at minimum flow rate behind the crosshead guide (20.1) without need for any support. ^ EFFECT: high sensitivity and accuracy of measurement at low flow rates. ^ 27 cl, 6 dwg |
