Screw blower capable of changing internal compression ratio by using pressure regulating hole

• Main Authors: LI GUANGSHUAI, GAO KE, CHEN JIAKUO, ZHANG YA'NAN, LI JIATAO, LIU HAO, HU XINLONG
• Format: Patent
• Language: Chinese; English
• Published: 18.10.2022
• 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 belongs to the technical field of screw blowers, and particularly relates to a screw blower for changing the internal compression ratio by using a pressure regulating hole, which comprises a casing, a driven rotor, a driving rotor, an air inlet and an air outlet, when air suction is finished, tooth peaks of the driven rotor and the driving rotor and the machine shell form a closed volume. One or more pressure adjusting holes are formed in the portion, close to the exhaust port, of the machine shell, the inner sides of the pressure adjusting holes are located in the area, close to the exhaust port, of the closed container, and the outer sides of the pressure adjusting holes communicate with the exhaust port from the outside through air pipes; a valve is mounted on the air pipe; compared with the prior art, different exhaust pressure intensities can be obtained under the conditions that the rotor and the machine shell are the same, the air inlet flow is the same, and the rotating speed is the same