OIL-SEALED ROTARY VACUUM PUMP

• Main Author: YAHAGI MITSURU
• Format: Patent
• Language: English
• Published: 16.01.1990
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; STEAM ENGINES; WEAPONS

PURPOSE:To increase adapted force of a vane point end part to the internal wall of a cylinder hole by providing a recessed part, which guides gas in a compression side of the cylinder hole to a bottom part of a groove arranged tilting, in a surface in a vane gas compression side. CONSTITUTION:A bottom part is closed of a rotor groove 14 slidably fitting each vane 15a, 15b, and each of these grooves 14 is provided tilting so as to respectively displace the bottom part to a direction of rotation side while an inlet part oppositely to the direction of rotation side, for the radial direction of a rotor 13. A recessed part 11, guiding gas in the compression side of a cylinder hole 2 to the bottom part of the groove 14, is provided in a surface in a gas compression side of the vanes 15a, 15b slidably fitted into the groove 14. In this way, force of the vanes 15a, 15b, acting in their springing out direction from the groove 14 of the rotor 13, is increased, and adapted force of a vane point end part to a cylinder hole internal wall is increased in cooperation with pressing force of compression side gas acting on a vane rear end part.