Analysis of the causes of deformation and failure of PEEK Braided Sleeve!

Peek Braided Sleeve is currently a type of sealing product widely used in the mechanical field. Usually, it can be used for dustproof, waterproof, oil seal, door valve, buffer, shock absorption, etc., and the possibility of damage and failure is not uncommon, aging deformation The phenomenon has become a relatively common phenomenon in PEEK Braided Sleeve, so most of the reasons for failure are not the design problems of PEEK Braided Sleeve and normal use damage. There are many main reasons, but the common reasons are several , so what are the main factors leading to deformation failure?

First of all, everyone should know that whether it is silica gel or rubber, the sealing effect of soft colloidal products must be deformed by extrusion, so when the pressure is greater than the pressure of the sealing medium, the sealing effect will be produced, and when it is less than that, leakage will occur. The reason is due to the permanent deformation of the PEEK Braided Sleeve under the high pressure of the working environment and the bite caused by being squeezed into the gap, so this is the main core factor, and several inevitable factors have been produced on the basis of this factor.
1. The working pressure leads to the deformation and failure of the Cable Sleeve
Pressure extrusion is the culprit for the permanent deformation of the Cable Sleeve. The pressure of the medium has a greater impact on the deformation of the PEEK Braided Sleeve. It is also the most common cause of PEEK Braided Sleeve deformation in all industries. With the modern hydraulic equipment In other developments, the pressure of the hydraulic medium is increasing, and the PEEK Braided Sleeve will cause permanent deformation in this high-pressure environment for a long time. This deformation is irreversible, so it should be selected for different working pressures. For different materials, choose silicone or rubber materials that are relatively pressure-resistant, wear-resistant, and temperature-resistant. Correspondingly, in order to cope with higher working pressure, the hardness of the PEEK Braided Sleeve of the pressure-resistant material will also increase accordingly.
2. Failure due to temperature
Temperature is very important to the relaxation degree of PEEK Braided Sleeve. No matter what kind of material, it will accelerate its aging speed at high temperature. When the temperature in the environment is higher, the deformation of the gas compression will be greater. When the product deforms When it exceeds 40%, the PEEK Braided Sleeve will slowly lose its elasticity, causing leakage.
When installing the PEEK Braided Sleeve, there will be initial stress, which will gradually disappear with the long-term relaxation of the PEEK Braided Sleeve and the gradual decrease in temperature, and in some cases may follow a sharp drop in temperature Even if the silicone rubber product material is resistant to high and low temperature, it will not exceed 25% of the stress generated at 20 degrees. Therefore, the initial stress should be set when installing the PEEK Braided Sleeve, and the work should be fully considered. The temperature factor in the environment.
3. Factors of compression and stretching
Due to the different formulations of PEEK Braided Sleeve rubber, the compression and tensile strength of PEEK Braided Sleeve produced by different companies are also different. Under long-term compression, the product will produce compression stress relaxation phenomenon, which will gradually expand with time. The longer the time, the smaller the amount of compression and stretching will be, making it less elastic and causing leakage. The most direct way to change is to increase the cross-sectional size of the product, but it will also lead to an increase in the structure of the product.
Therefore, in the early stage of use, we should do a good job in the selection of rubber PEEK Braided Sleeve. Its friction coefficient must be low, lubrication must be in place, and its contact surface must be smooth, not rough or stained. During the installation process, the coaxiality of the installation must be ensured, and the eccentricity must not be too large. At the same time, the rationality of the sealing system must be ensured, and the dimensional error must not be too large.