IP65 DC24V Gear Lube Oil Pump For Coal Mining Machinery Gearboxes 20 - 150 L/Min

Product Specification

The dedicated lubrication system for coal mining machinery gearboxes a complete integrated system

1. Introduction

The dedicated lubrication system for coal mining machinery gearboxes is a high-reliability, high-safety forced lubrication unit tailored for gearboxes in shearers, roadheaders, and other coal mining equipment. It is far more than a simple oil supply system; it is a complete integrated system for oil supply, filtration, cooling, monitoring, and control. Given the extremely confined space, harsh environment (high dust, humidity, flammable/explosive gases), and demanding operating conditions (heavy load, shock, continuous operation) of underground coal mines, this system is the lifeline that ensures the normal operation of gearboxes, extends their service life, and guarantees safe coal mine production.

2. Advantages

• Exceptional Reliability & Environmental Adaptability: All components (pumps, valves, sensors, etc.) feature explosion-proof design (Ex d I Mb or Ex d [ib] I Mb), complying with coal mine safety regulations (MA certification in China), and can withstand explosive atmospheres containing methane and coal dust.

• Superior Cleanliness Control: Utilizes multiple high-efficiency filtration stages (e.g., suction strainers, high-pressure fine filters) with high filtration ratings (up to βₓ(c)≥200 or higher), extremely effectively removing wear particles and contaminants from the oil to protect the expensive gearboxes.

• Powerful Heat Dissipation Capacity: Integrated air-cooled or water-cooled oil coolers effectively control the oil temperature of the gearbox under continuous heavy load, preventing oil oxidation and thermal deformation of the gearbox, maintaining stable oil viscosity and lubricating performance.

• Intelligent Monitoring & Safety Interlock: Equipped with pressure sensors, flow sensors, temperature sensors, and level switches. The system monitors lubrication status in real-time. If insufficient oil pressure, low flow, high oil temperature, or abnormal oil level is detected, it immediately triggers audible/visual alarms or initiates an automatic shutdown to prevent gearbox damage due to oil starvation.

• Compact & Vibration-Resistant Design: The system layout is compact to adapt to the limited space on coal machinery. All connections and components have excellent anti-vibration and shock resistance to withstand the severe vibrations of mining operations.

• Ease of Maintenance: Filter elements, air breathers, etc., are modularly designed for quick replacement underground, minimizing downtime. Differential pressure indicators signal when to change filter elements.

3. Key Technical Parameters

• Rated Flow: Designed based on gearbox displacement and oil demand, commonly ranging from 20 - 150 L/min.

• Rated Pressure: Typically 0.4 - 2.5 MPa, sufficient to overcome pipeline and filter resistance and ensure pressure at the furthest lubrication points.

• Filtration Rating: High-pressure fine filter rating is typically 10 μm, 20 μm, or 25 μm (based on ISO 16889 β-value ≥200).

• Cooling Capacity: Selected based on system heat load to ensure oil temperature is controlled below 50°C - 60°C.

• Motor Power: Explosion-proof motor, typically with power ranging from 1.5 - 7.5 kW.

• Explosion-Proof Rating: Ex d I Mb (according to Chinese GB3836 standard, suitable for underground coal mines).

• Protection Grade: IP65 or higher, dust-tight and protected against water jets.

• Control Voltage: Intrinsically safe circuit, typically DC24V or lower.

4. Applications

This system is dedicated to equipment operating in the extreme environment of underground coal mines:

• Shearers: Provides forced lubrication and cooling for the cutting transmission gearbox and traction transmission gearbox.

• Roadheaders: Provides lubrication for the cutterhead gearbox, loading mechanism reducer, etc.

• Continuous Miners: Provides centralized lubrication for multiple key reducers.

• Heavy-Duty Armored Face Conveyors (AFC): Provides lubrication for the gearboxes of the head-end and tail-end drive units.

• Other Underground Heavy Machinery: Lubrication for gearboxes in equipment like plough systems and drills.