Internal gear pump shell with good protection effect

The pump shell of the internal gear pump is good in protection effect and comprises a pump shell body and a pump cover, four sets of bolts are arranged on the pump cover in a penetrating mode, and the pump cover is installed on a port portion of the pump shell body through the four sets of bolts. Two sets of fixing sleeves are fixedly arranged on the inner wall of the pump shell body, two sets of mounting sleeves are fixedly arranged on the inner wall of the pump cover, rotating shafts are arranged between the two sets of fixing sleeves and the two sets of mounting sleeves, and the two sets of rotating shafts are sleeved with gears. A filtering assembly is arranged in the pump shell body, a protection assembly is arranged at the top end of the pump shell body, impurities in engine oil in the pump shell body can be filtered through the arranged filtering assembly, and impurity particles are prevented from being rolled on a gear to cause pitting corrosion abrasion to the gear; the top end of the pump shell body