language

News

News And Information

Home page

2020

Rotary seal on the basic knowledge of sealing

Rotary seal on the basic knowledge of the seal, the basic mechanical seal sealing performance, stable, low leakage, friction power consumption, small wear on the shaft, meet the conditions, so widely used. Complex structure, high manufacturing precision, expensive, inconvenient maintenance

Author:

Rotary sealWith regard to the basic knowledge of sealing, the basic mechanical seals are the sealing performance, stable, low leakage, friction power consumption, small wear on the shaft, meet the conditions, so widely used. The structure is complex, the manufacturing precision is high, the price is expensive, and the maintenance is inconvenient.

principle and its composition : The seal is called an end face seal,Rotary sealBasic knowledge about sealing.There is a pair of end faces perpendicular to the rotation axis. Under the working pressure and compensation of the fluid and the mechanical external force, some auxiliary systems are sealed and matched, and the other end face can keep fit and slide relatively to effectively prevent fluid leakage. The close fit of the end faces forms a small gap between the sealing end faces. When the medium passes through this gap, a very thin liquid film is formed, which has a certain resistance to prevent leakage, and has a lubricating end face and a long-term sealing treatment effect.

Basic composition : Static ring and rotating ring are grinding surfaces, also known as friction pairs. An auxiliary buffer mechanism with an elastic element as the main body. auxiliary sealing ring, so that the drive shaft and together with the ring components

Classification of mechanical seals,Rotary sealOn the basic common sense of sealing, according to the purpose of classification: divided into pumps, fans, submersible pumps for motors, marine pumps and some other.

Classification according to the principle of action: the number of sealing surfaces: single-sided, double-sided, multi-effect. Double ends are divided into axial and radial double-sided double ends. The fluid working pressure acting on the sealing end face is unloading or not unloading technology can be divided into: non-balanced, partial enterprise balanced and fully balanced.

According to the static ring installed in the seal end face inside or outside, divided into inside and outside.Rotary sealBasic common sense about sealing. The fluid is of built-in spring type. According to the number of springs of compensation mechanism, the springs are divided into single spring type and multi spring type. The elastic element rotates with the fixed mechanical seal as the shaft rotates. The leakage of the sealing working fluid between the end faces of the sealing material is of the external flow type if it is consistent with the development of the centrifugal motion direction of the shaft rotation, and vice versa. Mechanical seal with or without direct contact with the sealing end face, contact type, divided into hydrostatic and hydrodynamic types, different bellows can be divided into non-bellows bellows type, and can be mainly divided into two kinds of metal bellows, PTFE bellows, rubber bellows and so on.

Key words:

Rotary seal,Piston rod seal