▼ Industry Background and Operational Challenges
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Aviation lubrication systems are the lifeline safeguarding flight safety. From turbofan engine main bearings to accessory gearboxes (AGB), from auxiliary power units (APU) to helicopter main reducers, the reliable supply and recovery of lubricating oil directly determine the service life of rotating components and overall aircraft safety. Aviation lubrication operating conditions present extreme challenges including wide temperature spans (−55°C to +200°C), gas-liquid two-phase coexistence, and broad viscosity ranges (synthetic ester oils at 3–500 cSt), imposing nearly exacting demands on pump precision, durability, and lightweight design.

▼ Typical Process Pain Points and JONSN Solutions
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▎Insufficient Main Bearing Oil Supply Precision; High Bearing Failure Risk at Elevated Speeds
Turbofan engine main bearings operate at speeds up to 20,000–40,000 rpm. A lubricating oil supply deviation exceeding ±5% can lead to bearing overheating, rolling element skidding, or cage fracture. Conventional metering pumps exhibit significant flow drift across wide operating ranges and cannot maintain stable output under varying flight attitudes (pitch/roll).

Solution: Precision Metered Oil Supply for Main Bearings

• JONSN MPG Series magnetic drive micro gear pump, with a displacement of only 40 μl/r per revolution, single-channel 1–280 ml/min precision adjustable, flow repeatability accuracy ≤±0.5%

• Pulse-free continuous delivery, paired with a servo motor for linear closed-loop speed-flow control, adapting to load variations across the entire flight envelope

• 316L stainless steel pump body + PEEK gears + tungsten carbide shaft sleeves, resistant to long-term immersion in synthetic ester aviation lubricants (MIL-PRF-23699/7808)

• Compact dimensions (ϕ20×80 mm), directly integrable into the engine accessory gearbox, meeting extreme lightweight requirements

Recommended Configuration: JONSN MPG Series, 40 μl/r per revolution, servo-driven, flow accuracy better than ±0.5%

▎Gas-Liquid Two-Phase Coexistence in Return Oil Lines; Conventional Pumps Suffer Cavitation and Efficiency Drop
Aero engine bearing chamber return oil is a typical gas-liquid two-phase flow with gas void fraction (GVF) reaching 20%–50%. Conventional centrifugal or gear pumps experience drastic efficiency degradation in aerated media, generating severe cavitation that leads to flow pulsation, increased noise, and rapid pump body wear—directly impacting oil tank level stability and system reliability.

Solution: Return Oil Degassing and Two-Phase Flow Transport

• JONSN DP Series large displacement gear pump (0.2–100 cc/r), featuring high-strength tooth profile design and optimized side clearance, offers excellent tolerance for gas-liquid two-phase media

• Precision gear meshing creates a self-priming squeeze displacement mechanism, maintaining over 85% volumetric efficiency even at 30% gas void fraction

• Optional integrated oil-gas separator pre-module; a swirl separation chamber at the pump inlet separates gas and routes it back to the accessory gearbox via vent lines

• DP Series handles viscosity range of 1–50,000 mPa·s, accommodating the dramatic transition between cold-start high viscosity (−40°C) and cruise-condition low viscosity (120°C)

Recommended Configuration: JONSN DP Series, 0.2–100 cc/r, GVF tolerance ≤30%, optional oil-gas separation module

▎AGB/APU/Helicopter Transmission Lubrication; Demanding Multi-Branch Precision Distribution
The accessory gearbox (AGB) drives fuel pumps, hydraulic pumps, generators, and other accessories, with each gear mesh point and bearing requiring precise lubricating oil distribution; APUs demand independent oil supply at 40,000–60,000 rpm high speeds; helicopter main reducers transmit enormous torque, and lubricant film failure leads to catastrophic damage. Multi-branch independent oil supply poses severe challenges to channel consistency, pulsation control, and long-term reliability of the pump.

Solution: Multi-Branch Independent Lubrication and Transmission System Oil Supply

• JONSN MRA Series micro gear pump (100–2000 ml/min), with multi-pump head parallel configuration for multi-branch independent oil supply, each channel independently adjustable without interference

• MPG micro pump can be embedded at various lubrication points within the AGB, directly spraying oil onto gear mesh surfaces and bearing raceways, reducing line losses and installation space

• MRA/MRB series or parallel configurations cover helicopter main reducer 2–20 L/min oil supply requirements, with high differential pressure drive ensuring adequate lubrication and cooling

• Entire series features magnetic coupling seals with zero-leakage design, eliminating lubricant leakage that could contaminate the engine compartment and create flight safety hazards

Recommended Configuration: JONSN MRA/MPG multi-pump parallel solution, 100–2000 ml/min/channel, magnetic seal zero leakage

▎Aviation Lubricant Additive Corrosion and Extreme Temperature Compatibility

Aviation synthetic ester lubricants (TCP anti-wear agents, phenyl-alpha-naphthylamine antioxidants, benzotriazole corrosion inhibitors, etc.) exhibit corrosive effects on pump body metallic materials; simultaneously, the environmental temperature spans from −55°C to +200°C, requiring not only corrosion-resistant materials but also that the pump's cold-start torque stays within specification and structural stability is maintained without binding at high operating temperatures.

Solution: Aviation-Grade Material System and Wide Temperature Range Design

• JONSN's entire aviation solution line comes standard with 316L/Hastelloy C-276 pump bodies, PEEK/PTFE gears, and tungsten carbide/silicon carbide shaft sleeves, fully resistant to ester oil and additive corrosion

• Precision gear lapping + thermal compensation clearance design: −55°C cold-start torque ≤0.5 N·m, no binding at +200°C high-temperature operation

• High-temperature type (MPG-HT) customizable up to 250°C continuous operation, meeting the demands of next-generation aero engines with higher turbine inlet temperatures

• Optional heating jacket/cooling jacket interfaces for assisted extreme cold-start and continuous high-temperature heat dissipation

Recommended Configuration: JONSN MPG-HT High-Temperature Type, 316L/PEEK/Tungsten Carbide material system, applicable −55°C–+200°C (customizable to 250°C)

▎Test Stand/Ground Maintenance System Requires Portable Independent Lubrication Unit

Engine test stands, component test benches, and ground maintenance (MRO) scenarios require independent, portable lubricating oil supply and recovery systems with modular, quick-connect interfaces, dual oil supply and return (with degassing) functionality, and traceable flow records for airworthiness certification.

Solution: Portable Independent Lubrication Skid-Mounted Module

• JONSN MRA/DP Series integrated oil supply pump + return pump + degassing module, packaged in a portable 19" standard rack or mobile cart

• Quick-connect aviation standard fittings (SAE AS4395), plug-and-play, compatible with various engine and helicopter transmission system test interfaces

• Built-in flow meter, temperature/pressure sensors; data recordable in real-time and output via RS485/CAN bus, meeting data traceability requirements for airworthiness certification (CAAC/FAA/EASA)

• Programmable multi-stage oil supply curves simulating lubrication condition variations across the full takeoff-cruise-landing flight profile

Recommended Configuration: JONSN Customized Skid-Mounted Lubrication Module, MRA supply + DP return + data acquisition, airworthiness traceable

▼ JONSN Aviation Lubrication System Recommended Product Matrix
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▼ JONSN Aviation Lubrication Solution Core Values
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▸ Aviation-Grade Precision Metering
The MPG Series' 40 μl/r ultra-small displacement paired with servo drive achieves main bearing oil supply accuracy better than ±0.5%, eliminating lubrication failure risk of high-speed bearings at the source.

▸ Confident Handling of Gas-Liquid Two-Phase Flow
The DP Series large displacement gear pump's proprietary self-priming squeeze displacement mechanism maintains 85%+ volumetric efficiency at 30% gas void fraction, resolving the core pain point of aviation return oil lines.

▸ Full Temperature Range Coverage
−55°C cold start to +250°C (custom) continuous operation; thermal compensation clearance design and a full aviation-grade material system ensure stable and reliable performance across extreme temperature spans.

▸ Magnetic Seal Zero Leakage
The entire series features magnetic coupling drive as standard, replacing dynamic shaft seals with static seals to thoroughly eliminate engine compartment contamination and fire hazards caused by lubricant leakage.

▸ Airworthiness Traceability
Integrated flow/temperature/pressure sensors with CAN/RS485 bus enable real-time data recording and export, meeting data traceability requirements for airworthiness certification (CAAC/FAA/EASA).

▸ Lightweight and Modular
Minimum pump body ϕ20×80 mm / weight <200 g, directly embeddable in accessory gearboxes or integratable into portable skid-mounted modules, maximizing installation flexibility.

▼ Conclusion
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The demands placed on pumps in aviation lubrication systems extend beyond mere “fluid transport” to precision fluid control under extreme temperatures, complex media (gas-liquid two-phase, corrosive additives), and stringent reliability constraints. Leveraging MPG ultra-precision metering, DP two-phase flow adaptation, full-series magnetic sealing, and an aviation-grade material system, JONSN provides a one-stop micro gear pump solution for the complete lubrication chain from turbofan engine main bearings to helicopter transmission systems, supporting the continuous evolution of China's aerospace equipment lubrication systems toward higher precision, greater reliability, and lighter weight.