What Is The Structure Of The Vacuum Pump？
High quality vacuum pump refers to the device or equipment that uses mechanical, physical, chemical or physicochemical methods to extract air from the container to obtain vacuum. Generally speaking, a good quality vacuum pump is a device used in a variety of ways to improve, generate and maintain a vacuum in an enclosed space.
According to the working principle of vacuum pump, vacuum pump can be basically divided into two types, namely gas capture pump and gas transfer pump. It is widely used in metallurgy, chemical industry, food, electronic coating and other industries. (1) the overall structure of the pump The layout structure of the high quality vacuum pump body determines the overall structure of the pump. Vertical structure of the inlet and exhaust port horizontal setting, assembly and connection pipeline are more convenient. But the pump center of gravity is high, at high speed operation stability is poor, so this type is used for small pumps. The intake of the horizontal pump is up and the exhaust port is down. 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 perpendicular to each other. At this time, the exhaust port can be opened from the left or right direction, in addition to one end of the exhaust pipe, the other end is blocked or connected to the bypass valve. This pump structure low center of gravity, high speed operation stability is good. Generally large and medium-sized pumps use this structure. The two rotor shafts of a good vacuum pump are installed perpendicular to the horizontal plane. This structure assembly clearance is easy to control, rotor assembly is convenient, pump covers a small area. But the pump center of gravity is high and the gear disassembly is inconvenient, the lubrication mechanism is relatively complex. 
(2) the transmission mode of pump The two rotors of the high quality vacuum pump run relatively synchronously through a pair of high precision gears. The drive shaft is connected to the motor through a coupling. In the transmission structure layout there are mainly the following two kinds: one is the motor and gear on the same side of the rotor. The driven rotor is driven directly by the motor end gear, so that the torsional deformation of the active rotor shaft is small, and the clearance between the two rotors will not change because of the large torsional deformation of the drive shaft, so that the clearance between the rotors is uniform in the operation process. The biggest disadvantages of this transmission mode are: a. There are three bearings on the drive shaft, which increases the difficulty of processing and assembly of the vacuum pump with good quality, and the disassembly and adjustment of the gear are inconvenient; b. The overall structure is not symmetrical, and the center of gravity of the pump is biased to the motor and the gearbox side.
December 08, 2022
