What types of sealing structures are typically found in ZQA400-IV-1/2 soft gear surface gear reducers?

The common types of sealing structures for ZQA400-IV-1/2 soft tooth surface gear reducers are as follows:

1. Felt ring seal: compact installation size, low technical requirements for disassembly and assembly, and low cost. But the wear is fast, the requirement for the linear speed of the shaft cannot be too high, and the service life is short. It is now less commonly used for shaft end sealing in this type of reducer.

2. Gap throttling groove sealing: Utilizing the tortuous gap throttling effect to produce a sealing effect, it belongs to non-contact sealing, has a long working life, and can be used in high-speed and low-speed conditions. However, the effect of using it alone is not ideal and it is often used as an auxiliary sealing method.

3. Skeleton oil seal sealing: Using spring rings to tighten the seal, the lip generates appropriate radial force on the shaft, and the lip can automatically compensate for wear to ensure good sealing performance. The sealing structure is simple, the installation is compact, the sealing performance is good, and it has certain adaptability to equipment vibration and shaft diameter eccentricity. However, there are high requirements for the dimensional tolerances, surface roughness, and surface hardness of the shaft diameter and oil seal hole groove, and factors such as the viscosity, oil quality, and environmental temperature of the lubricating oil can affect its sealing effect and service life.

4. Oil slinging ring seal: It belongs to the power type seal, which uses centrifugal force to throw the oil flowing out towards the shell wall and flows back to the oil pool along the return oil groove on the shell wall. It is suitable for working under high-speed conditions, but its sealing performance weakens under low-speed conditions.

5. Combination seal: composed of two or more sealing forms mentioned above. The sealing structure of press in end caps often uses a combination of spiral seals, oil slingers, and skeleton oil seals; The sealing structure of embedded end caps is generally combined with labyrinth seals instead of spiral seals and other sealing methods. Combination sealing can integrate the advantages of various sealing forms to improve the sealing effect.