What are the sealing structures of ZQA400-IV-1/2 soft tooth surface gear reducer?

ZQA400 - IV - 1/2 Common sealing structure types for soft-toothed gear reducers are as follows:

1. Felt ring seal: The installation size is compact, the disassembly and assembly technology is not high, and the cost is low. However, it wears fast, requires the linear speed of the shaft, and has a short service life. It is rarely used in the shaft end seal of this type of reducer.

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

3. Skeleton oil seal seal: Use spring coil to tighten the seal, so that the lip can generate appropriate radial force on the shaft, and can automatically compensate after the lip wear to ensure good sealing performance. The sealing structure is simple, compact, has good sealing performance, and has certain adaptability to the equipment vibration and eccentricity of the shaft diameter. However, the requirements for shaft diameter, dimensional tolerance of oil sealing slot, surface roughness and surface hardness of shafts are high, and factors such as the viscosity of lubricating oil, oil quality and equipment use ambient temperature will affect its sealing effect and service life.

4. Oil-swing ring seal: It is a power-type seal. Centrifugal force is used to throw out the outflow of oil towards the shell wall and flow back to the oil tank along the oil return tank on the shell wall. It is suitable for working under high-speed conditions and weakening the sealing performance under low-speed conditions.

5. Combination seal: It is composed of two or more sealing forms mentioned above. For example, the sealing structure of the press-in end cover often adopts a combination of spiral seal, oil-swinging ring, and skeleton oil seal; the sealing structure of the embedded end cover is generally used to replace spiral sealing with other sealing methods. Combined seals can combine the advantages of multiple sealing forms to improve the sealing effect.