The Application of Ceramic Seals

We often see ceramic seals in automotive and vehicle engineering. Their wear resistance improves dimensional stability, thereby enhancing vehicle performance, reducing noise emission levels, and extending the lifespan of various pumps in vehicles. For example, ceramic seals are found in coolant pumps, electronic fuel pumps, and high-pressure pumps for diesel engines. Now, let's look at some examples to understand ceramic seals.

Application of Ceramic Seals in Ships

Modern large ships are equipped with seawater desalination equipment, and there are dedicated discharge pipes for crew life sewage.

Many people have doubts about whether the relative rotation of the propeller shaft below the hull might cause seawater infiltration. In fact, this technology is mature. Ceramic seals are installed on the shafts of industrial and civil diving pumps to ensure that water does not infiltrate the rotor and stator under high pressure.

The principle of underwater seals is straightforward, but the manufacturing difficulty is high with strict precision requirements. One end of the ceramic seal is fixed to the iron shell of the ship, and the other end is fixed to the rotating shaft. Two high-temperature and friction-resistant ceramic rings are in close contact and maintain relative rotation. The gap between the two ceramic rings is smaller than water molecules. This ensures that the rotating shaft does not leak water during high-speed rotation.

The propeller and the main engine are connected via a drive shaft, which is a rotating component, and the drive shaft is sleeved with a tail shaft tube. There is a good tail shaft seal between the tail shaft tube and the propeller shaft. So, water ingress is prevented. Of course, the seals on large ships are more advanced and complex.

Application of Ceramic Seals in New Energy Electric Vehicles

A ceramic ring, the size of a fingernail or a coin, may look inconspicuous, but it is an important component of new energy electric vehicles. This small electronic ceramic ring, scientifically known as the "new power battery ceramic sealed connector," is used in new energy electric vehicles to form a sealed conductive connection between the power battery cover and the terminal post. On the one hand, there are workshops for ceramic granulation, dry pressing, vitrification, and precision machining, which at first glance look identical to ordinary ceramic production plants. However, the subsequent printing workshop and brazed sealing workshop are the core of the electronic ceramic "transformation." This breakthrough addresses the weldability issues of traditional electronic ceramics restricted by materials, solving the safety problems of battery connectivity and electronic control technology in the field of new energy vehicles. We can see widespread applications of electronic ceramic products, such as power battery ceramic sealed connectors, energy storage charging piles EV ceramic relays, ceramic power resistors, and more.

Application of Ceramic Seals in Batteries

The ceramic seal is located underneath the battery cover, and its function is to ensure that the battery has good airtightness, preventing electrolyte leakage and providing a good airtight environment for the internal reaction of the battery. At the same time, it also acts as a pressure relief buffer when the battery cover is pressed down, ensuring the normal operation of the internal components of the battery and providing important guarantees for battery life and safety.

Ceramic seals are widely used in various aspects of our lives. Due to their high-performance electrical sealing systems using special ceramic seals, they have excellent thermal resistance, mechanical shock resistance, and corrosion resistance. They are commonly used in electrical sealing systems and, due to their excellent corrosion resistance and biocompatibility, are often used in medical implant devices such as defibrillators, cochlear implants, and nerve stimulators. Their excellent high-temperature resistance, vibration resistance, and mechanical impact performance are also frequently used in aerospace, such as aircraft engines and fire detection systems.