BB-B Mini Hydraulic Gear Oil Pump BB-B6

The core working principle of the BB-B pump is to form sealed liquid chambers through the meshing of internal gears (outer rotor) and external gears (inner rotor), achieving oil suction and pressure by utilizing volumetric changes. Let me help you outline its working process and characteristics:

1. Workflow
Suction Phase: The internal gear (driving gear) rotates the external gear (driven gear), causing the meshing points to gradually separate. The volume of the liquid-containing chamber increases, creating a partial vacuum, which draws the oil under atmospheric pressure.
Pressure oil stage: As the gears continue to rotate, the meshing point gradually approaches, the volume of the liquid-holding chamber decreases, the oil is compressed, and the pressure rises, then the oil is discharged through the pressure oil port.
II. Structural Features
Gear tooth design: The internal gear features an arc-shaped tooth profile, while the external gear adopts a short cycloid shape, eliminating the need for a crescent-shaped partition and resulting in a more compact structure.
Advantages: Low noise, smooth oil delivery, and excellent self-priming performance, suitable for high-speed and low-pressure hydraulic systems (working pressure typically ≤2.5MPa).
3. Application Scenarios
It is widely used in hydraulic systems of machinery such as machine tools, gearboxes, and compressors, serving as a power pump, lubrication pump, or cooling pump, and is particularly suitable for conveying various types of oil.

Simply put, the BB-B pump achieves stable delivery by precisely meshing gears to “draw in and push out” oil.