Gearbox
One of the central components in the cutter head of a trailing suction hopper dredger is the gearbox of the pump. This gearbox is heavily loaded. The challenge here is that regular gearbox oils often fall short in providing the necessary protection against wear. Failures and downtime are often the result.
A solution is the use of specialized lubricants, including the Eurol Specialty Lube 68-S. The technology in this lubricant ensures that the gearbox is much better equipped to handle the extreme conditions in which the cutter head must operate. Think of high loads, corrosion from salty seawater, wear and blockages from sand and stones, dirt and contamination from chemicals and other harmful substances, temperature fluctuations, and changes in depth. In addition to using specific lubricants, it is important to perform regular maintenance and inspections to keep the gearbox in top condition.
Hydraulic System
Another critical component of the cutter head is the hydraulic system, where a hydraulic fluid such as the Eurol Specialty E HD Lube 46 BIO is recommended. Besides the product properties, biodegradability is important in case of a leakage. This is an important added value for companies aiming to comply with the MARPOL conventions (International Convention for the Prevention of Pollution from Ships) in the sustainability field.
Bearings and Open Lubrication Points
Due to the extreme environmental conditions, the bearings in the cutter head require specific lubrication. The bearings ensure the smooth operation of the cutter head, as they support the rotations and movements of the parts. They undergo high mechanical loads, where improper lubrication leads to increased friction and wear, ultimately causing bearing failure. Here too, there is a good opportunity to opt for a high-performance lubricant that is also biodegradable. In this case, the Eurol Specialty E HD Grease HY-2/104-S BIO is the most suitable grease within our range.
Assembly and Disassembly
For smooth assembly and disassembly of parts in the cutter head, an assembly paste such as the Eurol Assembly Paste SG provides a solution. In addition to its anti-corrosion properties and water resistance, this assembly paste facilitates maintenance by preventing parts from rusting together, making disassembly easier.
Other Open Lubrication Points
For the many open lubrication points on a trailing suction hopper dredger, such as cables, chains, hinges, threaded rods, and pin-in-bush connections, a lubricant in spray or grease form is suitable. The Eurol Specialty Lube PL BIO Spray is a dry lubricant that protects against wear and corrosion while being biodegradable. The Eurol Specialty Grease CS-2/502-S is a lubricant that offers high performance both as grease and spray.
Conclusion
Maintaining a trailing suction hopper dredger is essential to ensure optimal performance and a long service life, especially given the harsh conditions to which the cutter head is exposed. By choosing the right specialized lubricants, such as the Eurol Specialty products, ship owners and operators can not only enhance the efficiency and sustainability of their equipment but also comply with strict environmental regulations. Regular maintenance, the use of high-quality and biodegradable lubricants, and preventing wear through proper lubrication are key to preventing failures and maximizing the productivity of the trailing suction hopper dredger.
