Device for a runner
A device for a runner ( 1 ) for a fluid machine comprising a runner hub ( 2 ) and a number of blades ( 4 ) distributed around the centre axis ( 8 ) of the runner ( 1 ), each blade ( 4 ) being detachably connected to the runner ( 1 ).
1. A runner for a liquid machine that is designed to work in sand-containing water, comprising:
a runner hub that has a curvature on a blade side thereof, and
a plurality of curved blades distributed around a centre axis of the runner, wherein each blade is detachably connected to the runner hub
wherein each blade fits complementarily into a groove in the runner hub, the groove following the curvature of the blade as well as the curvature of the runner hub surface.
2. The runner in accordance with claim 1 , wherein the groove is divided.
3. The runner in accordance with claim 1 , wherein the runner is closed by means of a runner ring.
4. The runner in accordance with claim 1 , wherein the blade is formed with a hollow key at its mounting in at least the runner hub or a runner ring.
5. The runner in accordance with claim 1 , wherein the blade is connected to the runner hub by means of a bolt connection.
6. The runner in accordance with claim 1 , wherein the blade is connected to the runner hub by means of a rivet connection.