Seal characteristics of inclined ring spring contacts

Seal characteristics of inclined ring spring contacts

Mechanical seal is a safe and reliable seal form, widely used in fluid seal. In the sealing process, do not directly contact with the rotating shaft and wear, so as to obtain a better sealing effect, reduce leakage, improve the safety and reliability of the machine. The mechanical seal structure of the inclined ring spring uses the inclined ring spring as the elastic compensation element of the mechanical seal. By using the characteristics of the inclined ring spring with large elastic deformation and small elastic change, better sealing effect can be obtained.

In some special occasions, such as high temperature, high pressure, high speed and other mechanical seal working conditions, the use of ordinary cylindrical compression coil spring mechanical seal performance is difficult to meet the requirements. In order to meet the needs of modern large-scale production, an axial end contact type mechanical seal spring is produced, which is the inclined coil spring, also known as the spring contact finger, finger spring. The main feature of the inclined coil spring is that the inclined coil spring with axial compression is used as the compensation element instead of the traditional spring push type mechanical seal. In the process of compression, each coil in the ring spring acts in parallel, compresses in the axis direction, and generates rotational motion along the circumferential direction. The mechanical seal of this structure relies on the elastic force provided by the inclined ring spring to push off the axial sliding of the static ring, compensate for the axial position deviation caused by wear, and also have a cushioning effect on the vibration and pressure changes under complex working conditions. Thus, the balance of axial force between the sealing pair is maintained, which can make the sealing friction pair form a better stable sealing film, and achieve dynamic sealing under the pressure of the sealing film itself.

Structural characteristics of inclined coil spring:

Tilt coil spring coil size small, quantity is big, current flow is big, technical economy, under the condition of the RAP large deviation, the stress of the remained constant helical coil spring, this feature can reduce the deformation of the spring, and can compensate the surface uneven and combination of tolerance for maximum impact, and helical coil spring can absorb a certain amount of compression deformation, So that it can work normally in vibration, shock and other harsh working environment.