Clearance detection device and detection method for large-size angular contact ball bearing

The invention discloses a clearance detection device and method for a large-size angular contact ball bearing, belongs to the technical field of bearing manufacturing and detection, and aims to solve the problem that the clearance of the large-size angular contact ball bearing cannot be detected in the prior art. The detection device comprises an annular cushion block, two magnetic dial indicators, six supporting plate structures and a plurality of positioning pin columns, the six supporting plate structures are arranged on the upper surface of the annular cushion block at equal intervals in the circumferential direction, and bearings to be detected are arranged on the upper surfaces of the six supporting plate structures. The to-be-measured bearing, the annular cushion block and the six supporting plate structures are detachably connected through a plurality of positioning pin columns, and the two magnetic dial indicators are arranged on the upper surface of the to-be-measured bearing and are magnetically at