Working principle of internal gear pump
The working principle of the internal gear pump is mainly based on the principle of internal meshing of gears. The following is a detailed description of its working principle:
1. Structural composition
The internal gear pump is mainly composed of internal gears, external pinion gears, pump body, end cover and crescent-shaped partition. Among them, the pitch circles of the internal and external gears are close to one side, and the other side is separated by the crescent plate on the pump cover, which together constitute a sealed working space.
2. Working principle
Suction stage: When the motor drives the main shaft to rotate, the active internal gear will drive the external pinion gear to rotate in the same direction. At the inlet of the pump, due to the gradual separation of the internal and external gears, a negative pressure area is formed, thereby generating suction, sucking the liquid into the working chamber of the pump.
Transportation stage: As the gears continue to rotate, the inhaled liquid is clamped between the tooth grooves of the gears and pushed to the outlet of the pump. In this process, the liquid is squeezed by the gears and the pressure gradually increases.
Discharge stage: At the outlet of the pump, the internal and external gears gradually mesh, squeezing the liquid out of the pump body, thereby completing the liquid delivery process.
3. Features and Applications
Features:
The internal gear pump has the characteristics of small size and low price.
Due to its unique structure, it is particularly suitable for conveying high-viscosity media with a viscosity range of 0.2~1000000cp.
The pump can convey in reverse, just change the direction of the motor.
The pump body can be flipped, and the inlet and outlet positions are at right angles, which is convenient for selecting the inlet and outlet positions.
Easy-connected inlets and outlets for heat preservation or cooling media are provided between the pump body, end cover and bearing seat.
It has the advantages of smooth conveying, high efficiency, low noise and long service life.
Application:
Internal gear pumps are widely used in petroleum, chemical, coating, dye, food, grease, medicine and other industries.
It can be used to convey Newtonian liquids or non-Newtonian liquids, including light, volatile liquids, to heavy, viscous, and even semi-solid liquids.
In summary, the internal gear pump realizes the process of liquid suction, conveying and discharge through the meshing and separation of internal and external gears. Its unique structure and advantages make it have a wide range of application prospects in the conveying of high-viscosity media.
