I.Polyurethane:The Cornerstone of High-Performance Synthetic Materials

Polyurethane(PU),an indispensable polymer in modern industry,derives its exceptional properties from a unique chemical structure.Formed through precise polycondensation of isocyanates and polyols,its molecular backbone features densely distributed carbamate groups(-NHCOO-)as performance anchors.These polar groups create robust hydrogen-bond networks,granting three key advantages:

1.Mechanical Properties:High wear resistance,tear resistance,and elastic recovery;

2.Chemical Stability:Resistance to mineral oils,solvents,and weak acid/base corrosion;

3.Environmental Tolerance:UV aging resistance,oxidation resistance,and broad temperature adaptability.

These traits make PU irreplaceable in seals,conveying systems,and damping components.

(Application of Bonve Cam Rotor Pumps in Polyurethane Field)

II.Pump Structure Analysis:Eight Precision-Engineered Modules

Stable operation of polyurethane melt rotor pumps relies on the coordinated function of core components:

>Components&Functions

・Pump Body:Houses high-pressure melt cavity with optimized flow channels and external thermal ports.

・Front/Rear Cover Plates:Form sealed pressure chambers;high-precision planes ensure axial sealing.

・Drive Shaft:Connects to drive unit,transmitting torque to actuate driven system.

・Driven Shaft:Engages drive shaft gear for synchronized reverse rotation.

・Shaft Sleeve:Reduces friction loss and provides radial support.

・Seal:Specialized dynamic sealing mechanism prevents melt leakage.

・Cooling Water Ring:Recirculating system precisely controls bearing temperature to prevent thermal deformation.

>Operating Mechanism:The drive unit rotates the drive shaft,which engages the driven shaft via precision gears.Twin rotors cyclically expand/contract sealed volumes in the pump chamber,enabling continuous suction-compression-discharge of high-viscosity melt.External thermal management via the cooling water ring maintains dimensional stability at 350°C.

III.Four Technical Advantages:Overcoming Extreme Conditions

1.Ultra-Low Pulsation Transport

Optimized involute gears and chamber design limit pressure fluctuation to±1%,enabling near-laminar linear output for optical-grade extrusion.

2.Modular Customization

-Structural Configurations:Single/dual flow paths and spur/helical gears selected per viscosity range.

-Material Adaptation:Special alloy steels for corrosive media;hardfacing alloys for abrasive conditions.

3.Extreme Condition Resilience

Triple-safeguarded stability:

-High Temp:Ceramic fiber insulation+cooling circuits sustain 350°C chamber temperature.

-High Pressure:FEA-reinforced pump body withstands 40MPa.

-High Viscosity:Large-module gear pairs with nitrided surfaces minimize shear resistance.

4.Long-Life Precision Engineering

Key components machined via 5-axis CNC;gear meshing accuracy meets ISO 1328-1 Grade 4.Combined with laser surface hardening,service life exceeds 20,000 hours.

(Application of Bonve Cam Rotor Pumps in Polyurethane Field)

IV.Industrial Value

In manufacturing premium PU films,elastomer fibers,and similar products,melt pumps have become core precision extrusion equipment.Their stable transport eliminates pulse defects from traditional screw extruders,controlling product thickness tolerance within±0.5μm.Rising demand for precision components—like EV seals and biomedical catheters—will drive further innovation in high-spec cam rotor pumps.

Bonve remains wholeheartedly dedicated to perfecting rotor pumps,delivering customized conveying and mixing solutions globally.For technical inquiries,product selection,case studies,or collaborations,contact us anytime:

Tel:+86-574-87588986/+86-13586591794

Website:[www.bvpumps.com](http://www.bvpumps.com)

Email:market@bonvepumps.com

We look forward to partnering with you,advancing industrial fluid transfer through precision innovation.