The mechanical performance plays a key role in the reliability of aviation plug. To select an aviation plug that is suitable for your own equipment, you should not only select a product with appropriate electrical performance, but also select a product that is suitable for your own use environment. The two must complement each other.
Adding force is one of the most important mechanical properties of single connection function. Aviation plug is usually used with the equipment, and the equipment often has a certain vibration due to its own factors or the impact of the environment, and this vibration will cause the aviation plug fretting and fretting corrosion effects, which can seriously cause the contact body and equipment to form resonance, and even cause connection failure due to the reduction of the effective contact surface of the contact body. Vibration will also increase the dynamic contact resistance of the contact body. We will explain the anti vibration method of aviation insertion in detail later.
The aviation plug shall not be mechanically damaged, nor shall the electrical performance standards be lowered. There is a misconception that the number of times of plugging and unplugging indicated in the specification is mainly the critical value of mechanical damage. In fact, it is not so easy to damage the mechanical properties. In particular, the contact body is usually made of copper alloy, and its wear resistance is enhanced by electroplating. The number of times of plugging and unplugging is usually the critical value of electrical performance degradation to failure due to insufficient contact positive pressure, but this failure is caused by mechanical reasons, So we classify it as mechanical life.
The electrical equipment features of aviation plug mainly include contact resistance, grounding resistance, electrical resistance and compressive strength. Its order of magnitude ranges from hundreds to thousands of megaohms. As the name suggests, the insertion and removal force is the insertion force and separation force of the contact body. The size of the insertion and extraction force is determined by the design and manufacturing process of the contact body. If the insertion and extraction force is too large, the pin will not be inserted in place, and the contact part of the contact body will become more worn and deformed. Long term operation will lead to contact failure; If the insertion and removal force is too small, the positive pressure at the contact part will decrease, and the contact resistance will increase accordingly. If the electrical performance fails to meet the standard due to the decrease of the conductivity, it will also be regarded as invalid contact. According to statistics, the contact failure caused by the insertion and removal force accounts for 45.1% of the total failure of the aviation connector contact body. The insertion and removal force not only directly affects the electrical performance of aviation plug contacts, but also affects the reliability of aviation plug products in vibration, impact and other environments. It is also the guarantee of flexible and convenient use of aero plug by users. The more the number of cores, the higher the design requirements for plug and pull force.
