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Deep Sea Sediment Pump Seal and Bearing Solutions

Purpose of designing and producing deep-sea sediment pumps

In order to dredge rivers and reclaim land for island construction, the use of deep-sea sediment pumps is essential. This specialized pump is designed to effectively remove sediment from underwater environments. Its purpose is to effectively extract sand, mud and other sediments from the seabed to ensure the smooth implementation of large-scale dredging and land reclamation projects.

Structural features of mining submersible slurry pumps, mortar pumps, mud pumps, and tailings pumps

The whole machine adopts a dry pump type to ensure efficient operation

To protect the motor, an oil chamber sealing method is adopted, and a mechanical seal is installed inside. This combination effectively prevents high-pressure water and impurities from entering the motor cavity. By adopting these sealing mechanisms, the motor is protected from potential damage caused by water intrusion or the presence of contaminants. This design feature improves the durability and reliability of the pump, allowing it to perform at its best even in challenging environments with water pressure and impurities.

In addition to the main impeller, the pump also has a stirring impeller that plays a key role

This secondary impeller is designed to agitate and stir the sludge settled at the bottom of the water, creating turbulence. This agitation helps to suspend and remove the sludge so that it can be pumped out efficiently. By incorporating an agitator impeller, this pump ensures effective removal of sediment and sludge from the water column, allowing for efficient dredging or cleaning operations. This feature improves the pump’s performance and helps it handle challenging applications where sediment buildup is a concern.

The pump’s overflow components, including the impeller and agitator impeller, are made from high-hardness, high-chromium cast steel

This material choice ensures excellent resistance to wear, corrosion, and sanding. High-quality cast steel components can withstand the abrasive effects of sand and other particles present in the pumped media. In addition, they are designed to allow large solids to pass through without clogging or damaging the impeller. By using this wear- and corrosion-resistant material, the pump can operate reliably in demanding environments where solids are present and harsh conditions are present, ensuring long-lasting performance and minimizing downtime for maintenance or replacement.

The motor of this pump is fully submerged in the water, which provides several advantages

First, it eliminates the limitation of the suction stroke, allowing efficient pumping even in deep water or flooded conditions. Second, this immersion enables a higher absorption rate of mud and slag, ensuring effective sediment removal. The submerged motor design also facilitates more thorough dredging of sand and slag slurries, improving the overall efficiency of the pumping process. By operating directly in the water, the pump can effectively handle challenging applications where traditional pumps may face limitations, making it a reliable choice for a variety of dredging and mud pumping tasks.

Product advantages

According to user requirements, the pump can be equipped with a flushing device or an electric agitator. The flushing device helps clean and prevent clogging by flushing the pump system with water or other suitable fluids. On the other hand, an electric agitator can be installed to enhance the mixing and stirring capabilities of the pump, ensuring effective suspension and movement of solids or sediments. The availability of these optional features allows customization according to specific application needs, providing versatility and flexibility in the operation and performance of the pump.

There are two recommended technical routes

Use a shielded pump structure, immerse the motor rotor in seawater, and isolate the corrosion of the winding coil by seawater through the shielding sleeve

The rotor bearing is immersed in seawater. Add a simple sealing ring or packing seal between the pump head and the shielded motor. Since the inside and outside of the equipment are in seawater, the pressure difference is very small. The mechanical seal is simple. Introduce a channel for clean seawater and flush the mechanical seal with high pressure to prevent mud and sand from entering the mechanical seal from the pump head. In this way, the bearing only needs to be resistant to seawater corrosion and does not need to worry about mud and sand wear. The difficulty is deep-sea seawater shielded motor or wet winding motor, seawater lubricated bearing, and mechanical seal.

Use ordinary motor + magnetic seal + anti-sand wear bearing

The motor can use a conventional motor, inject oil between the rotor and the stator, and use a pressure compensator, so that the motor is easy to manufacture. Magnetic transmission is also very good. In the absence of mechanical seal protection, the bearing needs to be resistant to sediment wear. The difficulty lies in seawater lubricated bearings and mechanical seals.

Bearing and sealing problems are common problems in both operating modes

Seal failure can cause sand to enter the shielded motor and cause damage. Likewise, worn bearings can also lead to motor damage. Therefore, it is critical to find ways to improve bearing wear resistance and seal reliability. Fortunately, we have successfully solved the bearing problem by ensuring excellent wear resistance and seawater corrosion resistance. The challenge of bearing wear has been overcome by using high-quality materials and advanced engineering techniques. These measures ensure that the bearings can withstand the abrasive effects of sand and other particles and the corrosiveness of seawater. As a result, the bearings exhibit excellent durability and service life, reducing the risk of premature failure and motor damage. Regarding seal reliability, we have implemented a strong sealing mechanism to reduce the risk of seal failure. Through careful design and rigorous testing, we have developed seals that can effectively prevent sand and water from entering the motor cavity. These seals provide reliable protection for the motor, ensuring that it can continue to operate even in harsh and abrasive environments. By solving the challenges related to bearing wear and seal reliability, we have overcome a significant obstacle in pump operation. The enhanced wear resistance of the bearings and the improved seal reliability provide peace of mind to operators, minimize the risk of motor damage and maximize the service life of the pump. With these advances, we can confidently provide solutions that are both efficient and reliable in dredging and sediment pumping applications. In response to sealing structure issues, we manufacture a variety of non-standard equipment, such as oilfield sediment pumps, sludge pumps, high-radioactive waste pumps, cement mixing pumps, thermal power desulfurization tower mixers, and chemical pumps with high particulate content. Pumps and agitators for conveying hard particles have been developed. The seal life can reach more than 1 year.

Conclusion

Deep-sea sediment pump seals and bearing solutions are designed to address the unique challenges faced when pumping sediments from deep-sea environments. These solutions focus on ensuring pump reliability, efficiency, and service life while minimizing maintenance and downtime. Key aspects of these solutions include: Sealing mechanism: Deep-sea sediment pumps require a robust sealing mechanism to prevent water intrusion and protect internal components from corrosion and damage. Specialized sealing solutions such as advanced mechanical seals or dual mechanical seals are used to provide effective sealing in high-pressure and corrosive environments. Bearing system: The bearing system in deep-sea sediment pumps needs to withstand the harsh conditions of the deep sea. These systems typically use heavy-duty, corrosion-resistant bearings that can handle the abrasiveness of sediments and provide reliable operation over a long period of time. Material Selection: The materials used in deep sea sediment pump components are carefully selected to withstand the corrosive nature of seawater and the abrasive nature of sediment. High-quality alloys, such as stainless steel or duplex stainless steel, are often used to increase durability and minimize wear. Lubrication System: Proper lubrication is critical to ensure smooth operation of deep sea sediment pumps and prevent premature wear. Advanced lubrication systems, including automatic lubrication systems or specialized lubricants, are employed to provide adequate lubrication and protect bearings and other moving parts from excessive friction. Monitoring and Maintenance: Deep sea sediment pump seal and bearing solutions often employ advanced monitoring systems to detect potential problems before they cause pump failure. These systems may include vibration sensors, temperature sensors, or condition monitoring software to allow for proactive maintenance and timely intervention. By implementing these seal and bearing solutions, deep sea sediment pumps can operate efficiently and reliably in challenging marine environments. These solutions help extend the life of the pump, reduce maintenance requirements, and minimize downtime, ultimately increasing productivity and reducing operating costs.