What is the purpose of a lantern ring in a mechanical system?

The purpose of a lantern ring in a mechanical system, particularly in the context of pumps and rotating equipment, is to distribute sealing water to the packing. This ensures that the packing material remains cool and lubricated, which is essential for preventing overheating and wear. By managing the flow of sealing water effectively, the lantern ring helps maintain an optimal seal, thereby minimizing leaks and enhancing the reliability and efficiency of the system. Proper sealing is crucial in maintaining pressure and performance, especially in applications involving fluids.

The other options do not accurately describe the function of the lantern ring. While additional support and minimizing vibration are important in mechanical systems, these roles are not what the lantern ring specifically addresses. Similarly, acting as a pressure relief is a function related to different components such as relief valves, rather than the lantern ring, which focuses on the sealing mechanism.