As we all know, the most important point in the use conditions of the salt spray test chamber is compressed air. The function of this compressed air is realized by the air compressor. This compressor is not a refrigeration compressor. These are completely different. Concept, in this article, we will work with you to understand the air compressor used in the salt spray test chamber. What is his working principle?
First, it has a suction process, which absorbs the outside air into the equipment. With the rotation of the rotor, one end of the teeth is gradually disengaged to form an interdental volume, and the interdental volume expands with time, forming a certain amount Vacuum, and the volume between the teeth is only in communication with the suction port at this time, so the air flows into it under the effect of the pressure difference;
Second, after the suction process is completed, the compression work is started, and the closing and conveying processes are performed at the same time: at the end of the suction, the main and auxiliary rotor tooth peaks will be sealed with the casing, and the air is in the tooth groove Sealing is no longer outflow, that is, [closing process]. The two rotors continue to rotate, and their tooth peaks and tooth grooves coincide at the suction end, and the anastomotic surface gradually moves to the exhaust end;
Third, during the conveying process, the meshing surface gradually moves toward the exhaust end, that is, the tooth groove between the meshing surface and the exhaust port gradually decreases, the gas in the tooth groove is gradually compressed, and the pressure increases, which is the compression process . While compressing, the lubricating oil is also injected into the compression chamber and mixed with the chamber gas due to the pressure difference. This is the injection process;
Finally, when the above work is completed, the final step is required, the exhaust process: when the meshing end face of the rotor turns to communicate with the exhaust of the casing, (at this time the pressure of the compressed gas is highest) the compressed gas begins to be discharged until the tooth The engagement surface of the peak and the tooth groove moves to the exhaust end surface. At this time, the space between the tooth surface of the two rotors and the exhaust port of the casing is zero, which is completed (exhaust process). At the same time, the rotor engagement surface and the casing enter The length of the tooth groove between the air ports reaches the longest, and the suction process is in progress again.
Attachment: Index requirements for the air compressor supporting the salt spray test chamber: Exhaust pressure: ≥8 kg Volumetric flow rate: ≥0.12m3 / min
Warm reminder: Air compressor is a must for using salt spray test box, but because it is not in the same industry as the test box, the test box manufacturers will not distribute it. The above requirements prepare an air compressor before using the salt spray test box!
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