Electrical Contact Lubrication Challenges:

※、Contacts are prone to arcing at the moment of on and off;

※、For sliding contacts, metal-to-metal friction requires grease with good lubricity;

※、poor low temperature;

※、Strict long-life lubrication requirements, the grease on the contacts volatilizes too quickly under the action of the arc, and the grease dries out after a period of time, losing its lubrication and protection functions;

※、Not compatible with plastics;  …

Solution:

※、Add antioxidants and metal passivators to reduce contact metal oxidation reaction;

※、The contact pressure drop should not be too large, and the grease film should not be too thick;

※、Use grease with good compatibility between metal and plastic;  …

Simulation bench experiment

Basic introduction:

※、The test bench system can perform durability tests on common switches in automobiles, such as ignition switches, car door lock cylinders, combination switches, rocker switches, key switches, rearview mirror switches, etc. Designed stand.

※、The test bench is divided into three stations, which can test a set of combination switches, a set of ignition switches and three sets of rocker switches at the same time. All three stations can simulate the load of the switch and monitor its voltage drop at any time. The change of the voltage drop can reflect the wear of the contact part of the switch point.