What are the classification methods of aviation plugs? What are the methods of selecting low-frequency aviation plugs?

I. What are the classification methods for aviation plugs? There are many different ways to categorize aviation plugs. According to frequency, there are high-frequency aviation plugs and low-frequency aviation plugs; according to shape, there are round connectors; according to use: aviation plugs for cabinets, aviation plugs for audio equipment, power supply aviation plugs, special-purpose aviation plugs and so on.

II. What are the selection methods of low-frequency aviation plugs? 1. The number of contact pairs and pinhole sex: according to the needs of the circuit to select the number of contact pairs, while taking into account the volume of the electrical connector and the size of the total separation force. The number of contact pairs, of course, its volume is large, the total separation force is relatively large. In some cases of high reliability requirements, and the volume allows the use of two pairs of contact pairs in parallel to improve the reliability of the connection. 2. vibration, shock, collision: the main consideration of the aviation plug in the specified frequency and acceleration conditions of vibration, shock, collision when the contact pairs of electrical continuity. Contact pair in this dynamic stress situation will occur instantaneous disconnection phenomenon. The specified instantaneous breaking time is generally 1μs, 10μs, 100μs, 1ms and 10ms. It is important to pay attention to how to determine the contact pair transient breakage fault. Now it is generally believed that when the closed contact pair (contact) both ends of the voltage drop more than 50% of the power supply electromotive force, it can be judged that the closed contact pair (contact) failure. That is to say, to determine whether or not the instantaneous break has two conditions: duration and voltage drop, both of which are indispensable. 3. connection: aviation plug is generally composed of plug and socket, of which the plug is also known as the free end of the aviation plug, socket is also known as a fixed aviation plug. Through the plug, socket and insertion and separation to realize the connection and disconnection of the circuit, thus giving rise to a variety of connection methods of plugs and sockets. For round aviation plugs, there are mainly three ways: threaded connection, bayonet connection and bullet connection. Threaded connection is the most common, it has the advantages of simple processing technology, low manufacturing cost, wide range of applications, but the connection speed is slow and not suitable for frequent insertion and extraction and rapid connection of the occasion. Bayonet connection due to its three bayonet groove lead longer, so the connection speed is faster, but it is more complex manufacturing, the cost is also higher. Bullet type connection is the fastest connection speed of the three connection methods, it does not need to rotate the movement, only a straight line movement can be realized to connect, separate and lock the function. Since it is a straight push-pull connection, it is only suitable for aviation plugs with a small total separation force. Generally more common in small aviation plugs.4. Installation and shape: the installation of aviation plugs have a front installation and rear installation, installation and fixing methods such as rivets, screws, card ring or the aviation plug itself pin fast locking and so on. There is also a plug and socket are free end aviation plug, the so-called relay aviation plug. 5. environmental parameters: environmental parameters are mainly ambient temperature, humidity, temperature change, atmospheric pressure and corrosive environments, etc.. Electrical connectors in the use and storage, transportation process in the environment has a significant impact on its performance, so it must be based on the actual environmental conditions of the corresponding aviation plug.

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