Gear Melt Pump For Reaction Kettle

working principle of gear melt pump for reaction kettle

The core of the reaction kettle gear melt pump is the "positive displacement meshing transmission".

Through the meshing rotation of a pair of high-precision gears, the high-temperature melt in the reactor is "quantified and pressurized" and then transported to downstream equipment (such as extruders and spinning components).

Advantages of gear melt pump for reaction kettle

Compared to traditional bottom-of-tank discharging equipment (such as single-screw conveyors, plunger pumps, and gravity discharge), bottom-of-tank melt gear pumps offer the following advantages due to their unique structure and operating principle:
1. Extremely High Flow and Pressure Stability
As a positive displacement pump, its output flow rate is directly related only to gear speed and gear module (volumetric efficiency), and is independent of outlet pressure fluctuations. Under normal operating conditions, flow rate fluctuations can be controlled within ±1%, significantly lower than screw conveyors (±5%-±10%), effectively ensuring thickness uniformity and consistent physical properties of downstream products (such as chemical fibers and films).

2. Efficiently convey high-viscosity melts

To address the high viscosity of molten polymer materials (such as PET, PP, and PVC), the pump utilizes a "large tooth width, low speed" design. Combined with high-temperature, wear-resistant gear material, this reduces shear heating during melt production and prevents material degradation. It also achieves high-lift conveying (outlet pressures up to 35 MPa), meeting the needs of long-distance pipeline transportation or high-pressure molding.

3. Reliable operation and low maintenance costs

The pump's simple structure and lack of wearing parts ensure a long service life. Furthermore, its optimized lubrication design (using the melt itself to lubricate the gears) eliminates the need for additional lubricant, preventing melt contamination and reducing maintenance workload.

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