Details
Introduction
Modern aero engines feature precisely machined components and sensitive seals that are highly vulnerable to corrosion and contamination during periods of inactivity.
The Aero Engine Preservation Power Pack draws corrosion-inhibiting oil (OM-11) from its onboard reservoir and injects it into the engine’s fuel and lubrication circuits, creating a protective film that prevents moisture-induced damage and seal degradation. Compact, trolley-mounted, and designed for field or hangar use, it combines a DC-driven gear pump, multi-stage filtration, and intuitive controls to make engine preservation fast, reliable, and safe .
System Overview
• Portable Trolley Design: Extruded-aluminium frame on four steerable castors for single-person handling and rapid deployment
• Self-Contained Reservoir: 24 L aluminium tank with a manual level scale for direct visual oil monitoring
• Multi-Stage Filtration: 40 μm filler breather → 149 μm suction strainer with check valve → 10 μm inline filter with electrical clog indicator
• DC-Driven Gear Pump: 11 cc/rev pump coupled to a 0.35 kW, 28 V DC motor at 1 500 RPM, delivering up to 800 L/h at pressures up to 10 kg/cm2
• User Controls: IP-rated on/off switch, front-panel needle valve for fine pressure adjustment, and a 4′′ dial gauge (0–10 kg/cm2) for real-time feedback
Working Medium
OM-11 Inhibiting Oil—a mineral-based preservation fluid containing anti-corrosion additives. OM-11 maintains a thin, protective layer on all internal surfaces, neutralizing moisture and combustion residues. It is the industry standard for long-term engine storage and transport, compatible with most turbine fuels .
Core Components
| Component |
Description |
| Reservoir & Level Scale | 24 L cylindrical aluminium tank with 10″ bolt-centre scale for manual oil-level checks |
| Filler Breather | 40 µm metal-mesh breather ensures particle-free refilling |
| Suction Strainer & Check Valve | 149 µm stainless-steel mesh prevents particulates; check valve prevents backflow |
| Gear Pump & Motor | 11 cc/rev gear pump + 0.35 kW, 28 V DC motor (1 500 RPM) via bell housing; rated 200 bar |
| Pressure Line Filter | 10 µm element with electrical clog indicator to warn of service needs |
| Delivery Hose | ½″ ID × 25 ft, rated for 110 bar working pressure |
| Needle Valve & Pressure Gauge | ½″ needle valve for pressure fine-tuning; 4″ panel-mount gauge (0–10 kg/cm²) |
| Electrical Box & Cable | IP-rated on/off switch; 15 m of 2-core, 6 mm² copper cable with 20 A MCB protection |
| Frame & Mobility | Extruded-aluminium chassis with four steerable castors for stability and manoeuvrability |
Technical Specifications
| Parameter |
Specification |
| Working Medium | OM-11 inhibiting oil |
| Operating Pressure | 0.8 – 10 kg/cm² |
| Delivery Rate | 800 L/hour |
| Tank Capacity | 24 L |
| Oil Temperature Range | 50 – 70 °C |
| Drive Motor | 0.35 kW DC, 28 V, 1 500 RPM |
| Pump Displacement | 11 cc/rev (max. 200 bar) |
| Filtration Ratings | 40 µm / 149 µm / 10 µm |
| Hose Rating | ½″ ID × 25 ft, 110 bar |
| Pressure Gauge Range | 0–10 kg/cm² (4″ dial) |
| Electrical Supply | 28 V DC, 20 A |
Operating Procedure
1. Preparation:
- Verify oil level ≥ 10 L on the scale; tighten all fittings and connect the delivery hose to the engine’s preservation port.
2. Startup:
- Switch on the MCB; motor and pump engage simultaneously.
3. Injection:
- Oil flows at 800 L/h; adjust pressure via the needle valve while monitoring the gauge.
4. Completion:
- Once the required volume is delivered, switch off the supply and wait for pump to stop.
5. Stowage:
- Disconnect and cap the hose; coil hose and cable neatly on the trolley.
Safety & Precautions
• Verify Oil Level & Connections: Always ensure oil level is above the minimum marking and all hose/coupling connections are secure before operation .
• Avoid Dry-Running: Never operate the pump with oil below the lowest scale mark or with the hose uncoupled.
• Depressurize Before Maintenance: Switch off power and release residual pressure before disassembling any part.
Maintenance & Calibration
• Daily Checks: Inspect oil level, hose integrity, and filter condition; tighten any loose fittings .
• Calibration: Use the supplied voltage-to-pressure chart (e.g., 17 V ≈ 4 bar at the hose outlet) to confirm performance .
• Consumables Replacement:
- Filler breather, suction strainer, filter element, hose, and level scale every six months .
• Mandatory Spares: Keep on hand the breather, strainers, filter element, hose assembly, pressure gauge, and needle valve for rapid service.
Applications & Benefits
• Corrosion Prevention: Forms a continuous protective film on internal passages and seals, preventing oxidation and pitting.
• Extended Seal Life: Lubricates and conditions dynamic seals to reduce cracking during storage or transit.
• Single-Operator Use: Trolley-mounted design and simple controls enable one technician to perform full preservation cycles.
• Quality Assurance: Multi-stage filtration and calibrated pressure control guarantee contaminant-free oil delivery every time.
This robust, turnkey preservation solution minimizes downtime and maintenance costs, ensuring aero engines remain in optimal condition between operations.
