Marine Brass Gear Fuel Pump

I. Product Overview

The marine brass gear fuel pump is a core fuel delivery equipment in the ship power system, specifically designed for fuel supply needs in complex marine environments. Its core function is to stably deliver diesel oil, heavy oil and other fuels to the main engine, auxiliary engine and other power equipment of the ship, ensuring the continuous and efficient operation of the power system. This equipment adopts high-quality brass and other copper alloy materials to manufacture core components such as gears, pump bodies and bushings, matched with corrosion-resistant sealing assemblies and reinforced transmission shafts. It has excellent resistance to seawater corrosion, fuel erosion and cavitation, and also has good thermal conductivity and mechanical strength. It can adapt to extreme working conditions such as high humidity, salt spray, vibration and complex fuel media faced by various ocean-going and coastal ships.

As a key part of the ship's fuel supply system, the marine brass gear fuel pump strictly complies with international and domestic standards such as the International Convention for the Safety of Life at Sea (SOLAS), IMO Marine Machinery Equipment Rules and GB/T 3216-2005 *Rotodynamic Pumps - Hydraulic Performance Acceptance Tests - Grades 1 and 2*. It has obtained certifications from mainstream classification societies such as China Classification Society (CCS) and American Bureau of Shipping (ABS), and is widely used in the power systems of various ships including ocean-going cargo ships, oil tankers, passenger ships, container ships, special operation ships and offshore drilling platforms. Compared with fuel pumps made of cast iron and ordinary steel, the corrosion resistance and cavitation resistance of brass materials can greatly reduce the failure risk in marine environments, extend the service life of the equipment, and build a solid fuel delivery line of defense for the stable operation of the ship's power system.

II. Core Technical Parameters

Flow Range: 5-200 m³/h, which can be customized in grades according to the power of the ship's power system and fuel consumption rate. The flow stability error under rated working conditions is ≤±2%, ensuring the accuracy and continuity of fuel supply for power equipment.

Pressure Range: 0.8-5.0 MPa, with a maximum working pressure of up to 6.0 MPa. It can meet the fuel supply pressure requirements of main engines and auxiliary engines of ships with different power levels, ensuring fuel atomization effect and combustion efficiency.

Medium Compatibility: It can stably deliver various commonly used marine fuels such as 0# diesel oil, -10# diesel oil, heavy oil and residual oil; suitable for fuel viscosity range of 5-200 mm²/s, impurity content ≤0.01% (particle size ≤0.1mm); applicable medium temperature range is -20℃ to 150℃, which can meet the needs of navigation in low-temperature sea areas and high-temperature fuel delivery.

Material Parameters: Gears, pump body and pump cover are made of brass; transmission shaft is made of 40Cr alloy steel (surface copper-plated for rust prevention); seals are made of fluororubber (FKM) or polytetrafluoroethylene (PTFE), which have excellent compatibility with various marine fuels and ensure no leakage or corrosion during long-term operation.

Drive Mode: Mainly adopts marine motor drive (three-phase asynchronous motor, protection class IP55/IP65), with optional hydraulic drive or speed increaser drive mode; the motor supports marine standard voltages of 220V/380V/440V, and the drive system is equipped with overload, overheating and phase loss protection functions, which can be linked with the ship's power control system.

Operating Performance: Volumetric efficiency ≥95%, operating noise ≤70 dB(A), vibration acceleration ≤1.0 m/s²; continuous operation life ≥8000 hours, small starting torque, excellent low-temperature starting performance (can start normally at -20℃); with self-lubrication function and long maintenance cycle.

III. Structural Design and Core Advantages

3.1 Core Structural Design

Integrated Brass Gear Structure: The gear and shaft are integrally forged from copper alloy, and the tooth profile is precision ground with an accuracy grade of 6 or above. The meshing gap is uniform, ensuring stable operation and effectively reducing pulsation and noise during fuel delivery; the good thermal conductivity of brass can quickly dissipate the heat generated by gear meshing, avoiding fuel deterioration due to high temperature.

Precision Sealing and Anti-Leakage System: Adopts a dual-seal structure of "mechanical seal + skeleton oil seal". The sealing surface is made of copper alloy and silicon carbide composite material, which specifically solves the erosion problem of fuel medium, with a leakage rate ≤0.001 mL/h; equipped with a seal chamber pressure monitoring device, which can give real-time early warning when the sealing performance decreases, avoiding safety hazards caused by fuel leakage.

Compact Anti-Vibration Protection Design: The pump body is integrally cast from copper alloy, with a compact structure and light weight (25-450 kg), which can be flexibly installed in the limited space of the ship's engine room; the exterior is equipped with a brass protective shell, which has both salt spray resistance and impact resistance; the base adopts elastic shock absorption supports, which can effectively buffer the vibration during ship navigation and avoid resonance with the hull structure.

Intelligent Monitoring and Protection Module: Equipped with a dedicated intelligent control box, which real-time monitors key parameters such as the operating temperature, inlet and outlet pressure, and flow rate of the pump body, and the data can be synchronized to the ship's central control system; it has overload protection, dry running protection and high-temperature protection functions, and will automatically shut down and alarm under abnormal working conditions, facilitating quick troubleshooting by the crew.

3.2 Core Technical Advantages

Superior Corrosion and Cavitation Resistance: Copper alloy materials have extremely strong corrosion resistance to seawater, salt spray and various marine fuels (sulfur-containing fuel, heavy oil, etc.). After 5000 hours of fuel immersion test, there is no obvious corrosion or wear; at the same time, it has excellent cavitation resistance, which can effectively avoid cavitation damage to the pump body caused by pressure fluctuations during fuel delivery.

Stable Operation and Accurate Delivery: The precise brass gear meshing structure ensures stable flow output and small pulsation, which can accurately match the fuel demand of the ship's power equipment, improve fuel atomization effect and combustion efficiency, and reduce fuel consumption; the high mechanical strength of brass ensures structural stability under long-term high-frequency operation, with a low failure rate.

Adaptable to Complex Marine Environments: Designed for different navigation environments such as ocean-going and coastal areas, it can stably adapt to extreme environments with humidity ≤98% and salt spray concentration ≤100mg/m³; excellent low-temperature starting performance, which can meet the navigation needs in polar and frigid sea areas; strong high-temperature resistance, which can adapt to the working conditions of heavy oil heating and delivery.

Convenient Maintenance and Long Service Life: Brass components are not easy to rust or scale. Daily maintenance only needs to regularly clean the inlet filter screen and check the sealing status, without frequent replacement of accessories; key components adopt modular design, and wearing parts can be quickly disassembled and replaced, with maintenance time ≤30 minutes; the continuous operation life is 2-3 times that of ordinary steel fuel pumps, greatly reducing operation and maintenance costs.

Strong Safety and Compliance: Brass materials have good anti-static and thermal conductivity, which can effectively avoid safety risks caused by static accumulation and local high temperature during fuel delivery; strictly follow international and domestic ship safety standards, pass multiple rigorous tests by classification societies, and adapt to the safety specification requirements of various ship power systems.

IV. Typical Application Scenarios

4.1 Power Fuel Delivery for Ocean-Going Cargo Ships/Oil Tankers

Ocean-going cargo ships and oil tankers have long navigation distances and complex working conditions, requiring high reliability and corrosion resistance of fuel pumps. The marine brass gear fuel pump can stably deliver diesel oil and heavy oil to the main engine and auxiliary engine, adapt to the salt spray and vibration environment of long-term marine navigation, and its cavitation resistance can avoid damage caused by fuel pressure fluctuations during ocean navigation, ensuring the continuous operation of the power system.

4.2 Fuel Supply for Passenger Ships/Luxury Yachts

Passenger ships and luxury yachts have strict requirements on navigation comfort and safety. The marine brass gear fuel pump has low operating noise and small vibration, which can improve navigation comfort; its superior corrosion resistance and sealing performance can avoid safety hazards caused by fuel leakage, and at the same time, accurate flow delivery can ensure the stable operation of the power system, adapting to the high-end use needs of passenger ships and yachts.

4.3 Fuel Systems for Special Ships (Icebreakers, Scientific Research Vessels)

Icebreakers and scientific research vessels often navigate in low-temperature sea areas such as polar and frigid zones. The marine brass gear fuel pump has excellent low-temperature starting performance (can start normally at -20℃). The low-temperature resistance and corrosion resistance of copper alloy materials can adapt to extreme low-temperature and high-salt spray environments, providing stable fuel delivery guarantee for the power system of special ships.

4.4 Fuel Delivery for Power Equipment of Offshore Drilling Platforms

Offshore drilling platforms face extreme environments such as strong salt spray, strong vibration, high temperature and high humidity. The brass protective shell and dual-seal structure of the marine brass gear fuel pump can effectively resist the impact of salt spray erosion and vibration, stably deliver fuel to the main engine, power generation auxiliary engine and other power equipment of the platform, and ensure the continuous development of platform operations.

4.5 Fuel Supply for Coastal Fishing Vessels/Small Operation Ships

Coastal fishing vessels and small operation ships have complex navigation environments and limited maintenance conditions. The marine brass gear fuel pump has the characteristics of convenient maintenance and long service life, which can reduce maintenance frequency and cost; its seawater corrosion resistance can adapt to the high-salt spray environment of coastal areas, providing reliable fuel delivery support for the power system of small ships.