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Nanjing Lanjiang Pump Industry Co., Ltd
Process principle and application of gear submersible thruster
Date: 2025-08-06Read: 7
Gear submersible thruster is a diving equipment that integrates gear reduction mechanism, mainly used for water mixing and propulsion, achieving efficient hydraulic mixing by optimizing speed and torque. The process principle is based on a submersible motor driving a gear reduction device, which drives the impeller to rotate and generate a smooth water flow, suitable for specific working conditions and industrial processing.
1、 Process principle
1. Motor drive and gear reduction: The submersible motor (protection level IP68) rotates at high speed to output power. The speed is reduced to 35-135 revolutions per minute through a gear reduction gearbox (such as a cycloidal pinwheel or planetary gear type), while increasing torque to meet the load requirements of large diameter impellers (1100-2500 mm); The deceleration design prevents the risk of impeller cavitation or entanglement caused by high speeds.
2. Working mechanism of impeller: After deceleration, the power is transmitted to the swept banana shaped blade, which generates low tangential flow (flow velocity of 0.15-0.5 meters/second) when its self-cleaning structure rotates, forming a circular main flow zone and turbulent flow zone, realizing the three-dimensional circulation of water from the bottom of the pool to the surrounding areas, eliminating mixing dead corners, and evenly distributing oxygen and heat.
3. Sealing and Durability Design: Adopting a dual mechanical seal or tungsten carbide sealing system, combined with gearbox oil chamber protection, to ensure no leakage during long-term underwater operation (depth ≤ 20 meters); The material is selected from polyurethane, stainless steel or aluminum alloy, which is corrosion-resistant and suitable for environments with medium temperature ≤ 40 ° C and pH value 5-9.
2、 Application Fields
Gear submersible thrusters play a central role in the following scenarios:
1. Wastewater treatment: used in aeration tanks, anaerobic tanks, and oxidation ditches to promote sludge suspension, enhance nitrification/denitrification efficiency, prevent sedimentation, and work together with aeration systems to improve oxygen utilization efficiency.
2. River and lake management: improve the fluidity of black and odorous water bodies, inhibit algal growth, and restore ecological balance.
3. Industrial wastewater treatment: suitable for solid-liquid gas mixing and stirring in wastewater tanks of chemical, papermaking, and food industries to ensure uniform contact of reaction materials.
4. Aquaculture: Increase the oxygen content of aquaculture water and optimize the circulation of aquaculture environment.
When selecting, the gear reduction type should be matched based on the pool volume, thrust requirements (power 1.5-7.5 kW), and flow rate standards. For example, planetary gearboxes are preferred for large blade diameters to meet high process requirements.
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