The invention relates to the technical field of air inlet shells of starters, in particular to an air inlet shell of a small
aviation starter and a
machining process of the air inlet shell. Comprising an air inlet shell, the air inlet shell is composed of an upper shell body and a lower shell body,
turbine blades are installed in the lower shell body, an air inlet
pipe is welded and fixed to the side wall of the upper shell body, and an air guide
assembly is arranged at the position, close to the air inlet
pipe, in the upper shell body; the air guide
assembly comprises an arc-shaped air guide plate and a convex-face air guide block, an arc-shaped air guide channel is formed by a gap between the arc-shaped air guide plate and the convex-face air guide block, during starting, air enters the arc-shaped air guide channel from the air inlet
pipe and is guided by the arc-shaped air guide channel to be blown to the
turbine blades, rotation of the
turbine blades is achieved, and directional
airflow guiding is achieved through the air guide
assembly. The air control assembly is matched to treat turbulence,
diffusion of gas to the leeside is reduced, and the gas
utilization rate and the turbine rotation stability are improved.