Screw vacuum pump rotor profile

• Main Authors: WANG LEI, WU QINGYUN, JIN MASUFUMI, MIAO LIANXIN, ZHANG DA, WU JIE, MIAO WENYAO, YE QING, RUAN YIYANG
• Format: Patent
• Language: Chinese; English
• Published: 20.09.2022
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

The invention relates to the field of screw vacuum pumps, and discloses a screw vacuum pump rotor molded line which is characterized in that the rotor molded line is composed of five sections of curves which are sequentially connected end to end, and the five sections of curves are a screw tip circle A1A2 with the radius being R, an eccentric rose line A2A3 and a conjugate envelope line A3A4 of the eccentric rose line A2A3 in sequence in the clockwise direction. Therefore, leakage triangles are completely eliminated, and leakage between the front stage and the rear stage of the screw rotor and leakage between the screw rotor and a pump cavity are extremely small. The size of a screw tip circle and the size of a screw root circle can be autonomously adjusted, and by adjusting the eccentricity a and the area utilization coefficient c of the eccentric rose line A2A3, compared with a traditional screw end face profile, the area utilization coefficient is increased by 5%, so that the volume efficiency of the screw