Aviation rotary seals

Introduction of aviation rotary seals

The aviation industry is an important part of modern society, and the performance and reliability requirements of aircraft engines are getting higher and higher. In aero engines, rotary seals play a vital role. Rotary seals maintain a seal between mechanical components in high-temperature, high-speed and high-pressure environments to ensure engine operation.

Definition

Aviation rotary seals are rotating mechanical sealing device used in aero engines, mainly used to prevent the leakage of hot gases and high-speed liquids. Rotary seals are typically made of metallic and non-metallic materials and are able to withstand extreme operating conditions such as high temperatures, high speeds and pressures.

Classification of aviation rotary seals

Aviation rotary seals can be classified according to their construction and principle of operation. Here are some common types of rotary seals:

Rotary piston sealing

It consists of piston rings and sealing rings to prevent gas and liquid leakage between the piston and the cylinder block.

Rotating maze sealing

It consists of multiple annular or spiral sealing grooves that form a seal by the rotary movement of the lubricating oil.

Rotary face seal

It consists of a contact surface between a rotating part and a stationary part, and a seal is formed by the rotational movement of the contact surface.

Rotating mechanical seals

Seals are formed by friction between rotating and stationary parts, and are commonly used in rotor shaft seals in aero engines.

The principle of operation of aviation rotary seals

The principle of operation of aviation rotary seals is based on the interaction between sealing surfaces. Typically, rotary seals consist of rotating parts and stationary parts. The rotating parts are connected to the rotating parts of the engine, such as shafts or pistons, while the stationary parts are connected to the stationary parts of the engine, such as the cylinder block or casing.

When the rotating part rotates, a seal is formed by the rotational movement of the contact surface. The friction and contact force between the sealing surfaces can effectively prevent the leakage of gases and liquids.

Applications in the aviation industry

Aviation rotary seals have a wide range of applications in the aviation industry. Here are some of the main areas of application:

Aero engines

The aero engine is the core component of the aircraft, and the rotary seal plays a key sealing role in the engine, ensuring that the high temperature and high pressure gas does not leak and maintains the efficient operation of the engine.

Turbomachinery

Rotary seals are used in turbomachinery to prevent leakage of lubricating oil and working media and to maintain the normal operation of turbomachinery.

Pneumatic system

Aviation rotary seals are used in valves and pipelines in pneumatic systems to ensure the tightness of the system and prevent gas leakage.

Oil system

Rotary seals are used in aviation fluid systems to prevent fluid leakage and maintain fluid circulation and pressure balance in the system.

Summary

Aviation rotary seals are an indispensable and important part of the aviation industry. They effectively prevent gas and liquid leakage in high-temperature, high-speed and high-pressure environments through the friction and contact forces between the rotary movement and the sealing surfaces.

These seals play a critical role in aero engines, turbomachinery, pneumatics and fluid systems, ensuring the reliability, performance and safety of aviation equipment. With the development of aviation technology, the requirements for aviation rotary seals are increasing, requiring continuous innovation and improvement to meet the increasingly complex working environment and performance requirements.