What is the working principle of internal gear pump?

The working principle of internal gear pump is that the pitch circle of internal and external gears is close to one side, and the other side is separated by the "crescent plate" on the pump cover. The driving internal gear on the spindle drives the internal and external gears to rotate in the same direction. At the entrance, the gears are separated from each other to form negative pressure suction liquid, and at the exit, the gears are continuously embedded and engaged to extrude liquid.

In a floating internal gear pump with a support block, both internal and external gears adopt modified involute tooth profiles, and the high and low pressure cavities are separated by a movable crescent plate, so that pressure compensation is formed radially, so that there is almost no gap seal between the internal and external tooth tips and the crescent plate, and the axial dynamic compensation disc ensures a good seal of the axial gap, thus minimizing the internal leakage of the pump.

Low pressure 12Mpa, medium pressure 2 1 Mpa and high pressure 33 Mpa. This structure has high volumetric efficiency, complex structure and high manufacturing cost. Suitable for conveying all kinds of light and volatile liquids, even heavy and viscous liquids and even semi-solid liquids.

Widely used in petroleum, chemical, grease, coatings and other industries.

Extended data

Because of this unique structure, it is especially suitable for conveying high viscosity media, and the viscosity range is: 0.2- 1000000cp.

1, the internal gear pump can be transported in reverse, as long as the motor is changed;

2. The pump body of the internal gear pump can rotate, and the inlet and outlet positions are at right angles to facilitate the matching of the inlet and outlet positions;

3. The internal gear pump has an inlet and outlet interface between the pump body, the end cover and the bearing seat, which is convenient for connecting heat preservation or cooling medium.

4. The internal gear pump has the advantages of trapped oil, smooth transportation, high efficiency, low noise and long service life.

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