Cross axis cone-shaped twin screw expander

The invention discloses a cross axis cone-shaped twin screw expander. The cross axis cone-shaped twin screw expander comprises a cone-shaped male screw rotor (1), a cone-shaped female screw rotor (2),a cone-shaped pump body (3), a left transmission gear (4) and a right transmission gear (5). According to the cross axis cone-shaped twin screw expander, the cone-shaped male screw rotor (1) and thecone-shaped female screw rotor (2) are linearly cone-shaped from the low-pressure end surface (II to II) to the high-pressure end surface (I to I), so that under the transmission of the opposite crossaxis, the two screw rotors can be meshed correctly, the effective seal between the two screw rotors can be ensured; a contact line between the two screw rotors is shorter at the high pressure end, sothat the gas leakage is effectively reduced during the working process; the interior volume specific ratio of the twin screw expander is increased, the axial dimension of the twin screw expander is more compact, and a significa