Pump body assembly for compressor and compressor

The utility model relates to the technical field of refrigeration equipment, and discloses a pump body assembly for a compressor, which comprises a crankshaft, an air cylinder, an upper flange, a lower flange and a silencing piece. The air cylinder is arranged on the crankshaft and provided with an airflow channel. The upper flange is arranged on the crankshaft in a sleeving mode and connected with the upper end face of the air cylinder, a valve seat sinking groove is formed in the upper flange, and an exhaust hole communicated with the airflow channel is formed in the valve seat sinking groove. The lower flange is sleeved on the crankshaft and connected with the lower end face of the air cylinder. The silencing piece is arranged on the upper flange, a silencing cavity is defined by the silencing piece and the upper flange, and the silencing cavity communicates with the exhaust hole. An exhaust flow guide part is arranged at the outer end of the valve seat sinking groove. The exhaust flow guide part is arrang