Pump body of internal gear pump

The utility model discloses an improved pump body of an internal gear pump, which aims to solve the technical problems of strain and abrasion between an inner rotor and a pump shell assembly. A first rotating shaft assembling hole matched with a rotating shaft is formed in the center of the axial positioning face of the first inner meshing gear assembly, and an outlet of the liquid inlet channel and an inlet of the liquid discharging channel are distributed in the axial positioning face of the first inner meshing gear assembly and located beside the first rotating shaft assembling hole. An inner rotor first side first liquid film groove is formed in the axial positioning surface of the first inner meshing gear assembly; a first liquid film groove on the first side of the inner rotor is limited in a first anti-leakage matching area formed by matching the end surface of the first side of the inner rotor and the axial positioning surface of the first internal meshing gear assembly and extends along the surface o