Bush-tilting dynamic pressure bearing

The invention relates to the technical field of sliding bearings, in particular to a bush-tilting dynamic pressure bearing implementing pressure fluid inner feedback supporting on a bush back. The bush-tilting dynamic pressure bearing specifically comprises a bearing outer ring, a bush and a mounting assembly; and an oil gathering tank is arranged on the sliding face of the bush, gathers a pressure lubrication fluid on the sliding face and feeds back and guides the pressure lubrication fluid into an oil cavity formed in the back face of the bush through an oil hole to form supporting force forthe bush. A deformation structure is arranged in the middle of the bush to divide the bush into two blocks, and the mounting assembly applies radial elastic compressing force to the bush. When the bearing works, under the effect of the supporting force of the oil cavity in the back face of the bush, the corresponding block of the bush overcomes the radial elastic compressing force and spindle load force to be upwarped wi