The family of vacuum pumps is huge, the working principle of different vacuum pumps is different, but the most important thing is to understand their working principle is a very favorable way to understand and use the products. Trochoidal vacuum pump principle is mainly the use of rotor motion. Toothed-line vacuum pump working principle and structure shown in Figure, R1 is the pitch radius of the pinion 5, R2 is the pitch radius of the gear 4, R2 = 2R1. O1M is the radius of the rotor profile and is connected to the O1 circle. When the moving circle O1 is purely rolling on the inner circumference of the fixed circle O2, the locus drawn by point M is the theoretical model of the rotor, the trochoidal line. The pinion 5 fixed to the pump body and the pinion 4 fixed to the rotor are a pair of ring gears. When the crank 3 drives the rotor to make planetary motion along the pinion gear, point M on the pump body always contacts with the theoretical line of the rotor while the theoretical line of the pump body is the outer envelope of the rotor theoretical line curve family. The inner envelope area of ​​the rotor profile is always covered by the side of the rotor. If gas ballast holes are provided in the side cover, this area should be avoided. When the rotor is in the dotted line in the figure, the pump chamber is divided into three sections: the suction chamber, the closing chamber and the exhaust chamber. When the rotor rotates in the direction of the arrow, the B cavity communicates with the exhaust port, and the A cavity continues to breathe. Relative to the rotor rotor relative to the pump twice a week exhaust. Calculated from the planetary gear train ratio shows that the pump shaft to a revolution, the rotor half turn. Therefore, the pump shaft rotation, suction, exhaust each carried out. Through the above analysis, we can understand that because of the distance between the rotor center of mass and the rotation center, the eccentric mass of the trochoid pump can be completely balanced. This is also the focus of its working principle. Through continuous improvement and simplification of its working principle, it is of great significance for the research and development of the troching vacuum pump afterwards that all these professionals should pay attention to. Related articles: Fixed-chip vacuum pump advantages and disadvantages of fixed-chip vacuum pump features
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