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T: +86-156-0511-1716
E: hp018@hpcbkj.com
E: hp018@hpcbkj.com
In Fangong Industrial Park, Dongtai Town, Dongtai City
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The Stern Shaft Lubrication Oil Tank With Hand Pump is a dedicated lubrication system for marine stern shafts, designed to lubricate and cool stern tube bearings, minimize friction and wear, and prevent seawater contamination. It integrates gravity feeding, manual/electric pumping, and real-time monitoring, making it suitable for both small and large vessels.
Dual Pumping Modes: Equipped with a hand pump (for small vessels) and compatible with electric pumps (for large ships), ensuring flexible oil supply.
Gravity-Assisted Lubrication: High-mounted gravity oil tank enables continuous oil flow to stern tube bearings, ensuring stable lubrication.
Leakage Prevention: Features forward and aft seals to block oil leakage into the engine room and seawater intrusion into the stern tube.
Real-Time Monitoring: Equipped with temperature and pressure sensors to track oil conditions, preventing lubrication failure.
Component | Specification Range | Unit | Optional Configurations |
Gravity Oil Tank Capacity | 50 - 500 | L | 100L, 200L, 300L (customizable) |
Hand Pump Flow Rate | 2 - 5 | L/min | Manual operation, no power required |
Electric Pump Power (if equipped) | 0.37 - 1.5 | kW | 0.75kW, 1.1kW |
Inlet/Return Pipe Diameter | 25 - 80 | mm | DN32, DN40, DN50 |
Seal Material | Nitrile Rubber (NBR), Fluororubber (FKM) | - | FKM for high-temperature environments |
Temperature Sensor Range | -20 - 120 | °C | Digital display output |
Pressure Sensor Range | 0 - 1.6 | MPa | Alarm threshold adjustable |
Low-Level Alarm Trigger | 10 - 20% of tank capacity | % | Audible + visual alarm |
Independent Lubrication Cycle: Oil circulates from storage tank → pump → gravity tank → stern tube → return pipe → storage tank, forming a closed loop to avoid contamination.
Low-Level Alarm: Gravity tank’s built-in alarm alerts crew to refill oil in time, preventing dry friction of bearings.
Corrosion Resistance: Tank body made of 304 stainless steel or marine-grade aluminum alloy, resisting seawater corrosion.
Small Vessels (e.g., Fishing Boats, Yachts): Relies on the hand pump for oil supply—no electrical power needed, suitable for off-grid navigation and emergency use.
Large Ships (e.g., Cargo Ships, Tankers): Combined with electric pumps for high-efficiency oil transfer, matching the large stern shaft’s lubrication demand and reducing crew workload.
Harsh Sea Conditions: FKM seals and stainless steel pipes ensure system stability in high humidity, salt spray, and temperature fluctuations.
Gravity Oil Tank: Mounted at the ship’s upper deck (≥2m above stern tube) to utilize gravity for stable oil flow. Equipped with a sight glass for oil level checking and a low-level alarm.
Hand Pump: Compact, easy-to-operate manual pump installed near the storage tank—ideal for emergency oil supply when electric power fails.
Piping Network: Two independent lines (inlet/return) made of seamless steel pipes with anti-corrosion coating, ensuring smooth oil flow.
Sealing Units: Forward seal (prevents oil leakage into engine room) and aft seal (blocks seawater from entering stern tube), both replaceable without disassembling the stern shaft.
Monitoring Gear: Digital temperature and pressure gauges with data logging function, enabling remote monitoring via the ship’s central control system.
Oil Supply: The pump (hand or electric) transfers oil from the storage tank to the gravity oil tank until the tank reaches the full level.
Lubrication & Cooling: Gravity pushes oil from the gravity tank through the inlet pipe into the stern tube, forming an oil film between the stern shaft and bearings to reduce friction and absorb heat.
Oil Recovery: Used oil (containing heat and minor impurities) flows back to the storage tank via the return pipe; optional filters can be added to purify the oil.
Monitoring: Sensors continuously track oil temperature and pressure—if values exceed safe limits, the alarm triggers to notify the crew.
Custom System Design: Tailors tank capacity, pipe diameter, and pump type based on the ship’s stern shaft size, navigation area, and power configuration.
Installation & Commissioning: Sends professional technicians to provide on-site installation guidance and system commissioning to ensure optimal performance.
Maintenance Services: Offers regular maintenance plans (oil replacement, seal inspection, sensor calibration) and emergency repair services worldwide.
Spare Parts Supply: Maintains a stock of key spare parts (seals, pumps, sensors) for fast delivery, minimizing ship downtime.
Training Programs: Provides crew training on system operation, daily inspection, and troubleshooting to enhance safety and efficiency.
