Rear-end sealing cover for gear case test bed of wind power generation unit

The utility model discloses a rear-end sealing cover for a gear case test bed of a wind power generation unit. The middle of the rear-end sealing cover is provided with a shaft hole for enabling a gear case output shaft to penetrate through. The rear-end sealing cover is provided with a first connection structure, a second connection structure and a third connection structure, wherein a pair of coaxial cylindrical supporting arms arranged on the periphery of the rear-end sealing cover serves as the first connection structure; a plurality of connection holes arranged on the end face of the edge of the rear-end sealing cover serve as the second connection structure which is in sealing connection with a gear case through bolts; and a circle of connection holes arranged on the circumference at the outer end of the shaft hole serves as the third connection structure which is in sealing connection with a rotary assembly for supporting the gear case output shaft through bolts. The rear-end sealing cover overcomes sh