The Use Of Seals On Automotive Wiring Harness

The Use Of Seals On Automotive Wiring Harness

More and more attention is paid to the durability and reliability of auto parts. As a protective material, rubber parts have been widely used in automobiles. The importance of the silicone weather pack seals is self-evident, especially for the protection of the wiring harness in the engine room and the lower part of the car chassis. Because usually, these two places are in a harsh environment, there is a great possibility. There is also the concept of "wet zone" that needs to be understood. Generally speaking, we will expose the engine room and the lower part of the car to the air. Areas often affected by rain are called "wet zone", correspondingly, the cockpit and baggage. The box body and other parts are basically not affected by rain. This part is called the "dry area".

One of the biggest functions of an automotive wire harness seal is to isolate the wet and dry zone. This is an app. The common part is to install a dry zone and a wet zone separated between the engine room and the cockpit. The rear-wheel ABS harness needs to be equipped with a sealing ring, especially under the rear seat (such as golf). There is a sealing ring to separate the inner and outer parts to ensure that the water at the bottom will not leak into the cab during driving;

Each qualified wire harness has a hermetic seal to ensure that the seal on the wire harness can work properly.

Selection requirements for single wire seal

One way that Single Wire Seal Manufacturer share is to select suitable sealing materials and hydraulic oils, as well as the adaptability of working temperature and oil compatibility. The second is that the geometric position accuracy (concentricity) of the relative sliding parts and the sealing parts are high, the material is good (such as hard chrome plating) and the surface roughness is thin, which can prolong the service life.

(1) For hydraulic pumps, the motor shaft oil seal not only requires the sliding surface roughness in Ra to be 0.25 m but also the surface is plated with hard chrome. In specific use, the radial force of the oil seal lip spring needs to be adjusted according to the specific conditions, and the elasticity is moderate. Even install the casing or gasket to protect the sealing ring, so as to prevent his lips from twisting, twisted, and sliding out in spring.

(2) The commonly used rolling processing method for the inner surface of the hydraulic cylinder not only improves the surface roughness but also makes the surface cold hardened, which is beneficial to prolong the service life of the sealing ring. In addition, the pressure used, the length, and type of the sliding surface also has a great influence on the service life. Therefore, the "scheduled inspection" time should be determined based on these conditions.

(3) The lubrication state of the sealing surface is required to be in good condition to prevent contamination. It is important to use the clean grade of oil and the correct installation method.