Noise reduction structure of permanent magnet synchronous motor for machine room

The utility model relates to the technical field of noise reduction, and discloses a noise reduction structure of a permanent magnet synchronous motor for a machine room, which comprises a base, the inner side of the base is fixedly connected with a limiting cavity plate, the inner side of the limiting cavity plate is movably connected with a friction mechanism for fixing the base, and the outside of the limiting cavity plate is fixedly connected with an air delivery valve. An exhaust valve is fixedly connected to the outer part of the limiting cavity plate; air in a first vacuum chamber in the surrounding plate and air in a second vacuum chamber in the top plate are exhausted through an air pump by means of an air extraction valve outside the air shell, and meanwhile, effective noise reduction of the permanent magnet synchronous motor is achieved in cooperation with a sound absorption plate in the surrounding plate. The coaming is matched with the detachable top plate to facilitate isolation and noise reduct