Method of detecting air leakage of vacuum pump
Vacuum pump has been widely used in today's industry, especially in metallurgy, chemical industry, food, electronic coating and other industries. We know that all vacuum pumps include water ring vacuum pump, slide valve pump, rotary vane vacuum pump, roots vacuum pump and diffusion pump. With the continuous development of various industries, the demand of vacuum pump manufacturers is still rising.
Water ring vacuum pump, rotary vane vacuum pump and roots vacuum pump in vacuum pump, in fact, the detection principle of air leakage is the same!
In case of any air leakage during the use of vacuum pump, it is necessary to distinguish whether the air leakage part is vacuum pump or pipeline, because the solutions taken by the two are different.
1. The method of testing vacuum pump: separate the vacuum pump from its pipe, and directly measure the air inlet of vacuum pump with a vacuum gauge. If the vacuum degree of vacuum pump reaches the use standard, the possibility of air leakage of the pump will be eliminated;
2. Detection method of pipeline: take off the pipeline or a certain section of the pipeline, connect one end to the pump without air leakage, and measure the other end with a vacuum meter. Through this method, the leakage point can be distinguished.
The two rotors of the vacuum pump manufactured by the vacuum pump manufacturer complete their relative synchronous work through a pair of high-precision gears. The driving shaft is connected with the motor through the coupling. There are mainly two types of transmission structure: one is that the motor and gear are placed on the same side of the rotor. The driven rotor is directly driven by the motor end gear, so that the change deformation of the active rotor shaft is small, the gap between the two rotors will not be changed due to the change deformation of the active shaft, so that the gap between the rotors is even in the working process. The biggest disadvantages of this kind of transmission method are: A. There are three bearings on the driving shaft, which increases the difficulty of pump processing and assembly, and inconvenient disassembly and adjustment of gears; B. the whole structure is not symmetrical, and the center of gravity of the pump tends to one side of the motor and gearbox.
The air inlet of the horizontal vacuum pump is on the top and the air outlet is on the bottom. Sometimes, in order to facilitate the installation and connection of vacuum system pipes, the exhaust port can be connected from the horizontal direction, that is, the inlet and exhaust directions are mutually perpendicular. At this time, the exhaust port can be opened from the left or right direction. In addition to connecting one end of the exhaust pipe, the other end is blocked or connected with the bypass valve. The pump has low center of gravity and good stability at high speed. Generally, large and medium-sized pumps use this structure.