The utility model belongs to the technical field of
steam turbine assembly, and particularly discloses a
grinding device for a valve disc and a
diffusion steam
nozzle of a
steam turbine, which comprises a positioning plate, a guide sleeve, a
grinding rod, a
handle, the valve disc and the
diffusion steam
nozzle, the guide sleeve is mounted in the guide sleeve mounting hole of the positioning plate, and the axis of the guide sleeve is perpendicular to the end face of the positioning plate; the
grinding rod is inserted into a center hole of the guide sleeve, the grinding rod and the guide sleeve are coaxial, one end of the grinding rod is provided with the
handle, the other end of the grinding rod is connected with the valve disc, and the other end of the valve disc is in contact with the
diffusion steam
nozzle; the device is simple in structure and convenient to disassemble and assemble, the grinding effect between the valve disc and the diffusion steam nozzle can be rapidly and accurately achieved, the production efficiency is improved, the labor intensity of workers is reduced, and smooth proceeding of the production process is guaranteed.