Working principle of gear pump
Gear pump is a rotary pump that transports liquid or pressurizes it by relying on the change and movement of the working volume formed between the pump cylinder and the meshing gear. It consists of two gears, the pump body and the front and rear covers. When the gear rotates, the volume of the space on the disengaged side of the gear increases from small to large, forming a vacuum, sucking in the liquid, and the volume of the space on the meshing side of the gear changes from large to small The suction chamber and discharge chamber are separated by the meshing lines of the two gears. The pressure at the discharge port of the gear pump completely depends on the resistance at the pump outlet.
Structural characteristics of gear pump
(1) Simple and compact structure, small volume, light weight, good manufacturability and low price;
(2) The gear pump has strong self suction, insensitive to oil pollution, large speed range, impact load resistance, convenient maintenance and reliable operation.
(3) The end cover and each inter tooth groove of the gear form many fixed sealing working cavities, which can only be used as a quantitative pump.
Sealing form of gear pump
The shaft end seal of the pump is designed in two forms, one is mechanical seal and the other is packing seal, which can be determined according to specific use conditions and user requirements.