Copper Screw Lubricating Oil Pump

I. Product Positioning and Core Functions

Copper screw lubricating oil pumps are precision equipment designed for industrial lubrication systems. Using copper alloy screws and bushings, they achieve efficient and stable transmission of lubricating oil through the screw meshing principle. Their core functions include:

Low Wear and Long Life: Copper alloys (such as tin bronze and aluminum bronze) exhibit excellent wear resistance and anti-seizure properties. Combined with precision-machined screws and bushings (clearance ≤0.08mm), they ensure stable operation in high-viscosity lubrication scenarios, extending service life by over 30% compared to cast iron materials.

High Volumetric Efficiency: Tri-screw design (contact ratio ≥1.5) enables continuous, pulse-free delivery with volumetric efficiency ≥92%, adapting to lubricating oils with viscosity ranging from 3-1500cSt. Particularly suitable for high-pressure lubrication systems such as marine main engines and industrial gearboxes.

Self-Priming and Explosion-Proof Characteristics: Self-priming height ≤5m, no priming required during startup; copper alloy friction generates no sparks. Combined with explosion-proof motors (such as ATEX certification), they are safe for use in lubrication environments containing combustible gases.

Intelligent Control Compatibility: Supports variable frequency speed regulation (accuracy ±1%) and pressure monitoring (accuracy 0.5 class), automatically adjusting flow according to load with energy savings of 15%-25%.

II. Key Materials and Performance Parameters

III. Technical Advantages and Innovative Design

Low Noise and Stability

Tri-screw synchronous rotation design (speed ≤3000rpm) and precision dynamic balance treatment (residual unbalance ≤5g・mm), vibration value ≤2.0mm/s, noise ≤75dB, extending bearing life to 10,000 hours.

Smooth copper alloy surface (roughness Ra≤3.2μm), scaling rate 60% lower than cast iron, extending maintenance cycles to 12 months.

Intelligent Control and Energy Saving

Standard pressure sensor and temperature monitoring module automatically alarm and switch to standby pumps in case of abnormalities, enabling unattended operation.

Variable frequency control technology automatically adjusts flow according to load, maintaining efficiency ≥70% under variable conditions, with annual energy savings of 15%-25%.

Explosion-Proof and Safety Design

Copper alloy screws and bushings generate no sparks during meshing. Combined with explosion-proof motors (such as ATEX certification), they are suitable for transporting flammable and explosive media like gasoline and aviation kerosene.

Built-in safety valve (full reflux pressure 1.5 times rated pressure) prevents overpressure damage caused by pipeline blockage or misoperation.

IV. Typical Application Scenarios

Marine and Offshore Engineering

Main Engine Lubrication Systems: Tin bronze screw pumps transport heavy oil to marine diesel engines, resisting ship sway (tilt angle ≤15°), suitable for high-temperature fuel (oil temperature ≤120℃).

Seawater Cooling Systems: Aluminum bronze pumps withstand seawater with Cl⁻≤20,000ppm, flow 80-150m³/h. Combined with cathodic protection systems, service life is doubled compared to cast iron pumps.

Industrial Machinery and Power Equipment

Gearbox Lubrication: Tri-screw pumps provide 0.5-2.5MPa pressure oil, flow 20-200L/min, adapting to high-pressure lubrication scenarios such as wind turbine gearboxes and rolling mill gearboxes.

Hydraulic System Oil Supply: Aluminum bronze pumps with vibration-resistant design (amplitude ≤0.04mm) transport hydraulic oil to excavators and loaders, pressure 0.5-1.0MPa.

Special Lubrication Applications

Aviation Equipment: Precision copper screw pumps (sanitary design) transport aviation hydraulic oil, flow 0.1-10L/min, pressure 0.2-0.6MPa, resistant to CIP/SIP cleaning (135℃, 30 minutes).

Hydrogen Energy Equipment: Tin bronze pumps transport ethylene glycol-containing cooling liquid (freezing point -30℃), pressure 0.5-1.0MPa, suitable for alkaline electrolysis environments (pH 10-12).

V. Selection and Maintenance Key Points

Key Selection Parameters

Media Characteristics: Choose tin bronze for particulate media, aluminum bronze for high-pressure/corrosive media, and brass for conventional scenarios.

Working Condition Matching: Heating jackets for high temperatures (>80℃), aluminum bronze + explosion-proof motors for explosion-proof areas, and electric tracing for low temperatures (<-20℃).

System Compatibility: Select corresponding models based on flow (5-600m³/h), pressure (0.28-2.5MPa), and viscosity (3-1500cSt), e.g., KCB series for large flow, ZYB series for high pressure.

Maintenance Specifications

Daily Monitoring: Record inlet/outlet pressure and bearing temperature (temperature rise ≤35℃) daily; check vibration values (threshold ≤2.5mm/s) weekly.

Regular Maintenance: Clean Y-type filters (filtration accuracy ≤5mm) quarterly; remove oil sludge with special oil cleaners annually; replace mechanical seals when leakage >10 drops/minute.

Compliance Requirements

Industrial pumps must comply with GB/T 13007 Technical Conditions for Gear Pumps; explosion-proof scenarios need ATEX or UL certification; marine pumps require DNV GL or CCS classification society certification.

Food-grade applications need FDA certification; pharmaceutical-grade applications require ISO 10993 biocompatibility testing.