Outer water -cooling electricity main shaft

The utility model provides an outer water -cooling electricity main shaft, which comprises a rotating shaft, all install the bearing on the both ends of pivot, still be provided with the rotor and thestator of mutually supporting in the space that pivot and casing center on, the spiral water cooling groove has been seted up on the lateral wall of casing, casing outside cover is equipped with theheadstock, do sealed the processing between the lateral wall of headstock inner wall and casing, spiral water cooling tank bottom portion has seted up first blind hole, set up a screw hole that runs through the casing bottom first blind hole, the second blind hole has been offered on the outer circumference of stator, the screw hole is in the projection drops on the second blind hole on the outercircumference of stator, threaded hole twists and is equipped with a screw, spiral shell nail -head part immerses in the first blind hole, the head was kept away from to the screw one end runs throughthe screw hole inserts and