Structure of air suction hole of double-screw compressor and design method thereof

The double-screw compressor suction orifice structure comprises an axial suction orifice and a radial suction orifice, and a distance is arranged between the end face of the axial suction orifice and the end face of a suction side bearing; the axial air suction hole is provided with a delay angle, so that the air suction sealing angle is delayed; the radial air suction hole is correspondingly shortened according to the delay angle of the axial air suction hole, so that the axial distance of the radial air suction hole does not exceed the corresponding theoretical air suction spiral line after air suction delay. According to the designed air suction orifice structure of the double-screw compressor, the characteristic of unbalanced pressure distribution in a rotor cavity is fully considered, the problem of pressure mismatching of local orifices is avoided, sufficient air suction can be achieved, and therefore the volume efficiency and the heat insulation efficiency of the compressor are effectively improved; in