Application Of VFG-M Electric Lubrication Pump And QXV Single-Line Distributor For Wind Generators

Wind turbines work outdoors with wide temperature range (-40℃~85℃), heavy dust and salt spray on offshore sites. Multiple lubrication points including pitch bearings, yaw bearings and main bearings require unattended automatic lubrication. Only NLGI 0#~2# grease is allowed; greases with graphite, MoS₂, calcium carbonate or graphene are forbidden to avoid component damage.

1. Wide temperature adaptability, compatible with DC24V, AC220V and AC380V power supplies for hub and nacelle installation.
2. Max working pressure reaches 35MPa with 28MPa relief pressure, available with 1–3 oil outlets and 2–15L grease tanks (scraper plate / pressure plate optional).
3. Integrated programmable controller supports single-line lubrication mode, adjustable running & interval time, low-level alarm, blockage alarm and power-off data backup for remote monitoring.
4. Fully sealed waterproof and dustproof housing, suitable for long-term outdoor exposure on wind turbines.

1. Each outlet delivers adjustable grease volume of 0.25–5 ml per cycle to meet different dosage demands of bearings.
2. Visible indicator rod on every port to quickly judge normal grease discharge without disassembly.
3. Stable operation at -40℃~80℃, operating pressure 12.8MPa and rated pressure up to 41.3MPa to overcome long pipeline pressure loss.
4. Modular manifold design allows assembly of 2–8 outlets, compact QXV-XL version fits narrow hub installation space.
5. Separable plunger check valve for easy maintenance, dust cover protects internal parts against sand and salt corrosion.

1. Hub pitch lubrication system: DC24V VFG-M pump with pressure plate oil tank + QXV-XL modular distributors.
2. Nacelle yaw & main bearing system: AC-powered VFG-M pump with scraper oil tank + standard QXV distributors.
3. Pipeline layout: Steel/copper tubes for fixed sections; high-pressure flexible hoses for rotating hub parts. NPTF standard threads match pump and distributor ports.

Set lubrication cycle parameters on the pump control panel. The pump pressurizes grease and feeds the QXV distributors. Each pressure rise and release cycle makes distributors output fixed grease to each lubrication point. If low grease level or pipeline blockage occurs, the controller outputs FLL / FPS fault alarm signals to the wind turbine control system.

1. Daily inspection: Check system pressure, distributor indicator rods and pipe joint leakage.
2. Complete overhaul of pump plunger assembly and distributor internal parts every 6–12 months, replace aging seals.
3. Do not mix different types of grease; solid lubricant additives are prohibited without manufacturer approval.
4. This set of equipment is not certified for explosive hazardous zones. Piston and valve bore are matched lapped pairs, parts cannot be interchanged between units.