Common Problems Of Reciprocating Rotary Seals

What is the Rotary shaft seal? also known as the rotating shaft lip seals. Commonly known as the oil seals. DSH seals tells you that it is a dynamic sealing element installed between the rotating shaft and the stationary part to seal the leakage of lubricating oil and prevent external dust and debris from entering the inside of the equipment.

So, what kind of related sealing problems do we encounter in our daily work?

Question1: One shaft of the rotating reciprocating seals rotates and needs to reciprocate. The medium inside is oil, the pressure is 5MPa, and the shaft diameter is 40. Which kind of seals is better? Any best manufacturer recommendation?

Answer: The spring energized seals of DSH Seals is more suitable, but it depends on the speed of your rotation and reciprocation, as well as the temperature, the surface treatment of the shaft, and the required life, leakage rate, etc.

Question2: How to seal the rotating shaft?

Answer: According to the difference of the material to be sealed and the degree of sealing, there are many sealing methods: the most common ones are rubber seals, packing seals, mechanical seals, and labyrinth seals.

Question3: Can O-ring be used for rotary dynamic seals? (The seal needs to be considered when designing the machine. It is a rotary dynamic seal, low speed (the shaft speed is about 60rpm), low pressure (can be immersed in one meter of water without entering water).  Can o-rings be used ( If it can be used, is it better to open the groove on the shaft or the hole? What is the simplest rotary dynamic seal structure?)

Answer: If you use O-ring, it is best to add an elastic pressure to the sealing ring so that it can maintain the contact of the sealing surface, but the effect is not very satisfactory. It is better to use a skeleton seal, and a mechanical seal is better. Generally, bearings are required for rotation. The bearing must be pressed tightly with a bearing cover, and the sealing ring can be installed on the bearing gland.