Water-ring vacuum pump including built-in hogging flow path

A water-ring vacuum pump comprising a built-in hogging flow path, the water-ring vacuum pump comprising:

• a first-stage body comprising a gas inlet port through which gas is suctioned and a seal water supply port through which seal water is supplied, wherein each of the gas inlet port and the seal water supply port is provided on one side of the first-stage body;
• a second-stage body comprising a mixed fluid outlet port through which a mixed fluid of the introduced gas and seal water is discharged, wherein the second-stage body is coupled to the other side of the first-stage body;
• and
• an impeller configured to be rotated by an internal drive shaft penetrating the first-stage body and the second-stage body, wherein:
• the first-stage body has a fluid-mixing space provided therein, wherein the fluid-mixing space has a mixed flow of the gas and the seal water therein, wherein the mixed flow is performed by driving the impeller, and
• the second-stage body has a fluid guide space and an internal hogging flow path provided therein, wherein the fluid guide space guides a fluid supplied from the fluid-mixing space and the internal hogging flow path communicates the mixed fluid in the fluid guide space with the mixed fluid outlet port,
• the water-ring vacuum pump further comprising a partition wall formed therein, wherein the partition wall partitions the first-stage body from the second-stage body, wherein a distribution hole configured to connect the fluid-mixing space to the fluid guide space is formed in a radially outer portion of the partition wall.