High-pressure gear pump bearing with sealing structure

The invention relates to a high-pressure gear pump bearing with a sealing structure; and the high-pressure gear pump bearing is used for reducing the fuel leakage after pumping when a high-pressure gear pump works, so that the oil supply efficiency of the gear pump is improved. Because of existence of the part machining dimensional tolerance and geometric tolerance, in order to guarantee normal installation of the bearing in a shell cavity, a certain gap is guaranteed between the outer diameter of the bearing and the inner diameter of the shell cavity, so that the fuel leakage is inevitable. The high-pressure gear pump bearing with the sealing structure is provided with a peripheral sealing groove in the outer surface; and an oil passing hole is formed in the end surface bonded with a gear, and is communicated with the sealing groove. High-pressure radial pressure is applied to a rectangular sealing ring in the sealing groove through high-pressure oil to realize peripheral seal. The rectangular-section sealin