Cooling type roots blower

• Main Authors: WANG XUAN, CHEN BIN, LI FENG, YE GUIFENG, LU XIANGLIN, LI FENGFENG, CUI YI, TAN FENGYUN
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2022
• 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 discloses a cooling type Roots blower, which solves the problem of air leakage caused by overlarge gaps between blade tips of a male rotor and a female rotor and the inner wall of a shell by additionally arranging cooling circulation medium runners in the male rotor and the female rotor, and improves the vacuum degree. The clearance between the blade tips of the male rotor and the female rotor and the inner wall of the shell ranges from 0.01 mm to 0.5 mm; therefore, the effects that the vacuum degree is higher, the pressure difference degree is larger, the blades do not rub with a pump shell, the speed of escaped airflow is higher, heat generated between the blades is increased, heat generated by cooling circulation of a constant-temperature medium at blade tips and high rotation is absorbed, a stable state is achieved in cold regions and heated media are put in, and a low-temperature medium is added in hot regions, so that the heat generated by high rotation is reduced. And a stable state is ac