Reasons and solutions for the ineffective sealing of rotating seals

There are many reasons for the ineffective sealing of the rotating dynamic seal. The following types of common faults are common reasons:

1. Reasons for excessive leakage and solutions:

1. The installation of the rotating seal is incorrect. If the seal is installed properly, do not install it backwards or shift it, so as to deal with the problem of excessive leakage;

2. The working pressure of the sealing lip of the rotating seal is not enough (such as: skeleton seal). Check whether the product specification of the seal is proper or not, and check whether the bomb is in normal operation;

3. If the shaft is not smooth, it is likely to cause the leakage of the sealing material. The solution is to reduce the surface roughness of the shaft, or use softer seal products or other seal materials;

4. The sealing lip of the seal is cracked, causing the sealing material to be exposed from the gap. The reason for the cracking of the sealing lip may be because the shaft surface is not smooth, or the sealing material used is wrong or the speed is too high, and the temperature is too high. Seal products suitable for working conditions can solve the difficulties;

5. The seal is damaged or worn: dismantle and replace the seal product and improve the wear resistance of the seal.

2. Reasons and solutions for excessive friction between the seal and the sealing surface:

1. The friction between the seal and the sealing surface is too large. If it is possible to change to PTFE seals, it can improve the self-wetting property and reduce the friction of the friction surface;

2. The preload is too large. Under such conditions, it can be handled by changing the seal type;

3. Friction caused by excessive working pressure in the working environment. Under such conditions, the sealing type must be redesigned.

3. Reasons and solutions for the destruction of seals:

1. During the installation of the seal, due to improper or careless installation, the seal has been destroyed before the application, and the actual effect of the seal cannot be achieved. Therefore, we must install the seal appropriately and properly Use special tools;

2. There are frosted particles in the sealed natural environment (or shaft wear). In a dusty working environment, you must also apply a dust ring for the sealing position.

4. Reasons and treatment of excessive wear of seals:

1. Excessive wear may be caused by the sealing type or the incorrect use of the seal material. Before using the seal, we must apply a more suitable type of seal according to the standard of the working environment;

2. Excessive working pressure in the working environment is one of the reasons that cause the seals to wear too much. The solution is to apply a more suitable way of forming seals according to the working environment standards;

3. The temperature of the working environment is too high, causing the hard bottom of the seal to be too worn. We must apply more suitable heat-resistant seal products according to the standards of the working environment.