TURBINE TYPE FLOWMETER

PURPOSE:To adjust a gap between a bearing and a rotary shaft of an impeller to be a necessary one for rotating said impeller stably and smoothly by forming said bearing in the shape of a thin plate and holding said bearing in an axial direction of said rotary shaft in an elastically deformable manner. CONSTITUTION:The flow rate of a fluid running within a flow passage 2a is measured by magnetically detecting by use of a magnetic sensor 21 a magnet 22 of an impeller 11 rotating corresponding to the flow rate. Rods 5,9 of cones 3,7 upstream and downstream of the flow are fitted in central holes 4a,8a of supporting members 4,8, respectively, and therefore the position of the impeller in the axial direction can be adjusted by tightening nuts 6,10. Since pivot bearings 13,14 are elastically deformable like a leaf spring, even if end portions 12a,12b of a rotary shaft 12 are pressed against the bearing portions when a gap between the rotary shaft 12 and bearings 13,14 is adjusted, the bearings 13,14 themselves can deflect in the pressing direction within the range of their elasticity. Therefore, the rotary shaft 12 can be prevented from being broken.