Determination of the size of the sealing groove and the sealing ring
The goal of the design is to meet both the sealing and heat dissipation requirements of the chassis. Let's introduce the dimensions of the production drawings to everyone to discuss their rationality with the peers. The outer portion is oversized to create a conduction heat resistance between the two plates. The small size of the exposed part is small, coupled with the processing error and deformation, so that the sealing performance is not guaranteed. Thermal requirements. Appropriately improving the flatness and smoothness of the mounting surface of the traveling wave tube and the flatness and smoothness of the sealing surface 1 The purpose of improving the flatness and smoothness of the mounting surface of the traveling wave tube and the sealing surface is to reduce the thermal resistance and improve the sealing performance. To improve how much is appropriate, we give an empirical data for reference. The flatness of the mounting surface of the traveling wave tube and the sealing surface is 0.08. The smoothness of the mounting surface of the traveling wave tube and the sealing surface.
Installation requirements for traveling wave tube 1) First check if the flatness of the traveling wave tube mounting surface is 0.08, and if it does not meet the requirements, re-grind it. 2) Apply thermal grease between the traveling wave tube and the heat sink, but do not apply too much. After coating, the traveling wave tube is placed on the heat sink for several times, and the traveling wave tube is tightened after the thermal grease is even. 3) After installation, the clearance between the traveling wave tube and the heat dissipation plate should be <0.1.4. The thermal grease should be properly stored in the normal time. It should not be too dry or infiltrated. Installation of the fan At present, there are two types of installation on the production drawing: the first is that the fan collects the air from the side of the traveling wave tube; the second is the blowing of the power supply. The test proved that the first type of installation is better than the second. However, if the fan can be blown obliquely along the traveling wave tube, the effect is better. The main problem with the first two installations is that the wind blown by the fan can only be partially circulated, and the wind is not far from the fan, which increases the temperature gradient inside the cabinet.
High temperature is easy to cause circuit safety problems, and the instrument in the circuit is no exception. In summer, as far as the frequency converter is concerned, which is indispensable for equipment control and speed regulation, the hot weather is the heat and hard injury of the frequency converter. A large number of studies and practices have shown that the failure rate of the converter will increase with the increase of temperature, the service life will decrease with the increase of temperature, and the service life of the converter will be halved with the increase of ambient temperature by 10 degrees. For this reason, high temperature is coming, how we use Fluoride Solution to effectively cool down? Please contact us by email.
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