Hydraulic seals make possible many of the inventions that have defined today's civilization. A good example is car brakes. When you hit the brakes, a complicated series of hydraulic motions slow down the car. Hydraulic seal failure can be catastrophic depending on the hydraulic application. For example, car brake failure can be fatal. There are common problems you can expect with hydraulic seals.
1. Improper Installation
A hydraulic seal that is improperly installed will fail for several reasons. A seal must fit in an airtight manner. The biggest cause of improper installation is choosing the wrong size. Using improper tools when installing a hydraulic seal can make cuts and dents on the dynamic side. It makes the seal leaky, prone to contamination, and lowers the seal's efficiency. Proper design must be done to ensure correct hydraulic installation.
2. Seal Hardening
Hydraulic seals often work in very high temperatures. The stroking motion causes friction that produces high heat, more so when the stroking option is a very high frequency. As a result, the hydraulic fluid also heats up. A hydraulic seal will harden because of high heat, making it inflexible, and leading to cracking and failure.
3. Seal Contamination
Contaminants sometimes find their way onto the hydraulic rod. These contaminants include soil particles, mud, and assorted powder, and particle debris. The contaminants reduce the ability of the hydraulic seal to seal off the piston area. Infiltration into the piston area can cause motion application breakdown.
4. Seal Fracturing
Fracturing happens on the dynamic side of a hydraulic seal, especially a low-quality one. High back pressure and pressure spikes place excessive stress on the hydraulic seal, causing fracturing. It leads to breaking, burning, and forming long cracks on a hydraulic seal's dynamic side.
5. Seal Chemical Erosion
Corrosive chemicals can erode hydraulic seals, especially when a seal is improperly installed. Oil additives are the main culprits in eroding non-compatible seal material. Chemical reactions cause oxidation and hydrolysis in the seal material. It degrades in different ways. It can swell or shrink, the seal durometer will soften, and the seal lip interface will wear away. You will see discoloration on the seal when there is a chemical attack.
6. Seal Wear
Hydraulic seals wear out with time because of insufficient lubrication. Excessive lateral loads also cause significant stress on a seal. Wearing out will usually be seen on the dynamic side of a hydraulic seal.
Hydraulic seals are crucial parts of different machinery and appliances today. Knowing the common seal problems helps avoid making mistakes and prolonging the life of your purchases.