Rubber is the main body of the skeleton oil seal. It is especially important in the selection. It directly affects the performance and working state of the skeleton oil seal. When choosing which material to use to make the skeleton oil seal, many factors need to be considered, such as: working temperature, pressure, Line speed, media, etc. The process used for different rubbers is different, so it is necessary to consider which production process to use to make the skeleton oil seal, although many mainstream rubbers can now be used to make skeleton oil seals (eg: nitrile rubber, acrylic, fluororubber, silicone rubber). Etc.), but still have to follow the following points when choosing:

Rubber is the main body of the skeleton oil seal. It is especially important in the selection. It directly affects the performance and working state of the skeleton oil seal. When choosing which material to use to make the skeleton oil seal, many factors need to be considered, such as: working temperature, pressure, Line speed, media, etc. The process used for different rubbers is different, so it is necessary to consider which production process to use to make the skeleton oil seal, although many mainstream rubbers can now be used to make skeleton oil seals (eg: nitrile rubber, acrylic, fluororubber, silicone rubber). Etc.), but still have to follow the following points when choosing:

1. The highest actual temperature of the working environment.

The maximum temperature of the working environment at which the skeleton oil seal is used is not the highest.

2, the minimum operating temperature during work.

When the temperature is low, the rubber will become hard and brittle, and the resilience will become smaller. The oil seal lip will increase the holding force of the shaft and increase the friction, but after the shaft rotates, the friction will increase due to the tightening force. The lip of the heat-generating skeleton oil seal will gradually return to the original elasticity, so the skeleton oil seal can still operate normally under the condition of low brittleness of the rubber or lower temperature, provided that the rotation speed of the shaft is high.

3. The influence of the shaft speed on the material of the skeleton oil seal.

The shaft speed is an important factor for the selection of the skeleton oil seal material, because the excessively high shaft speed will generate friction with the lip. When the shaft speed is too fast, the temperature will be too high, which will reduce the oil seal's ability to follow the shaft. Excessive temperature will accelerate the aging of the rubber lip and shorten the life cycle of the skeleton oil seal.

4. Select the oil seal material according to the sealing medium.

To seal different media, you need to choose different oil seal materials, which can prevent the middle component of rubber from smudging the medium. Secondly, it can prevent the media from eroding the oil seal material.

5. Select the skeleton oil seal material according to the working condition.

The oil seal can be divided into a reciprocating oil seal and a rotary skeleton oil seal according to the working state. The rotary type is generally used in the mechanical shaft seal, and the reciprocating type is generally used in the rod seal, and the materials selected by different sealing methods are also different.

In fact, when selecting the oil seal material, the above points can not only be viewed from a variety of perspectives, but also select the appropriate skeleton oil seal material by combining various factors.

The speed of the general skeleton oil seal is related to the shape and pressure of the skeleton oil seal design. Generally, the maximum design speed of the rubber seal is about 15 m/s, and the maximum speed of the rotary seal of the PTFE lip seal is 30 m/s. In addition, the greater the pressure that the oil seal is subjected to during the rotary operation, the correspondingly the rotational speed is reduced. The higher or lower the temperature also affects the rotational speed and life of the oil seal.