TUBULAR MULTISTAGE TURBINE Russian patent published in 2009 - IPC E21C50/00 

FIELD: mining.

SUBSTANCE: there is disclosed tubular multistage turbine installed in drum-ripper before nozzle of flexible pivotal pulp line of positive floatability equipped with friction bearings set on ends of hollow shaft with supplying through channels on one end and withdrawing channels on another end of shaft, with covers with openings coaxial to supplying and withdrawing channels of bearings, and with journals. Also steps of a hydro-turbine stator are secured on the hollow shaft, while steps of a rotor are secured on the case of the drum-ripper, mounted on two levers. The tubular multi-stage turbine is equipped with a mixer made in form of several channels connected with flexible pivotal pulp-line of positive floatability and water line whereon gates with electric drive are assembled. From the side of discharge the cover of the hydro-turbine is equipped with a discharge manifold connected with a water line. Angles of output α₁ of flow from the stator of the hydro-turbine are accepted equal to α₁=77°-83°, angles of input β_1p and output β_2p of flow in the rotor correspondingly are accepted equal to β_1p=42°-46° and β_2p=15°-20°. Number of stages n of the hydro-turbine=8.

EFFECT: increased efficiency of hydro-turbine and facilitating control over capacity of hydro-turbine.

3 dwg