Stretching type variable gear pump

• Main Authors: HUANG LIRAN, LIU DAIYI
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2020
• 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 utility model discloses a stretching type variable gear pump, which is characterized in that an upper oil pressing base and a lower oil pressing base are stretched or pushed to change the size ofan oil pressing cavity, at the moment, the end part of a driving gear is always contacted with the upper end part of the lower oil pressing base under the action of an upper pressure spring, and a driven gear is always contacted with the lower end part of the lower oil pressing base under the action of a lower pressure spring; the end part is always in contact with the lower end part of the upperoil pressing base; at the moment, the part between the upper oil pressing base and the gear sleeve is the meshing part of the driving gear, so that the meshing sealing performance of the driving gearis ensured, and the part between the lower oil pressing base and the gear sleeve is the meshing part of the driven gear, so that the meshing sealing performance of the driven gear is ensured, and thevariable displacement of the