| 摘要 |
The invention relates to a turbine flowmeter for measuring the consumption of fluids, particularly water. The turbine flowmeter comprises a housing (1) with an inflow (2), and outflow (3) and a flow channel (4). The turbine flowmeter also comprises a measuring unit (5) for measuring and indicating the consumption. A turbine (10) with a hub (11) and a number of radial vanes (12.1, 12.2) is located inside the channel (4). A holding insert (20) is also located inside the channel (4) and is comprised of a water guide cross (20.1) and of an insert base body (20.2). The water guide cross (20.1) comprises a hub (21), radial struts (22) extending from the hub (21) to the wall of the channel (4), a nozzle body (23), which surrounds the front (14) of the turbine (10), however, a gap (17) remains through which the fluid flows, and comprises a central opening (24) in the nozzle body (23). The vanes (12.1. 12.2) of the turbine (10) are positioned near the nozzle body (23). A nozzle ring (16) connects the vanes (12.1, 12.2) and extends over the outer contour of the nozzle body (23) so that a nozzle gap (18) remains between the nozzle ring (16) and the nozzle body (23). This nozzle gap (18) communicates with the gap (17) between the nozzle body (23) and the front (14) of the turbine (10). The gap (17) and the nozzle gap (18) guide the fluid so that the turbine starts running even with the smallest flow of fluid and, even during a maximum rate of flow, keeps its position behind the water guide cross (20.1) without requiring any bearing.
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