Sealing and lubricating device of plunger of plunger pump

The utility model discloses a sealing and lubricating device of a plunger of a plunger pump. The sealing and lubricating device can seal and lubricate the plunger, sundries can deposit, and the service life of the plunger of the plunger pump and the service life of a packing of the plunger are prolonged. The device comprises a gland body and a copper pressing sleeve. The copper pressing sleeve and the packing are installed in a shell of a packing box and fastened through the gland body. The gland body is provided with oil filling ports, and the copper pressing sleeve is internally provided with an engine oil channel and a plunger lubricating groove. Sealing rings are arranged between the upper end face of the copper gland and the platform end face in the gland body, and an engine oil cavity is formed between the copper pressing sleeve and the packing box shell through the gland body. The continuous grinding of the solid sundries to the plunger and the packing is avoided, and only the plunger lubricating groove and auxiliary lubricating grooves need to be cleaned when the packing is replaced. According to the sealing and lubricating device, the number of times of pump shutdown caused by the packing and the plunger can be decreased, the pump starting time rate is increased, the working intensity of workers is reduced, the running cost of the plunger pump is reduced, and a very good using effect is achieved.