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Vacuum pump unitManufacturer: Structural characteristics of vacuum pump

Vacuum pump unitManufacturer: overall structure type of pump

The arrangement of the pump body of the vacuum pump determines the overall structure of the pump.

The inlet and exhaust ports of the vertical structure are arranged horizontally, which is convenient for the assembly and connection of the pipeline. However, the pump is high in the middle and poor in stability at high speed, so it is mostly used for small pumps.

The horizontal pump has the inlet above and the outlet below. Sometimes in order to facilitate the installation and connection of the vacuum system pipeline, the exhaust port can be connected from the horizontal direction, that is, the intake and exhaust directions are perpendicular to each other. At this time, the exhaust port can be opened from both left and right directions. Except one end of the exhaust pipe, the other end is blocked or connected to the bypass valve. This kind of pump is low in the middle and has good stability when running at high speed. Generally large and medium-sized pumps use this structure.

The two rotor shafts of the pump are installed perpendicular to the horizontal plane. The assembly clearance of this structure is easy to control, the rotor is easy to assemble, and the pump occupies a small area. However, the middle of the pump is high, the gear is inconvenient to disassemble, and the lubrication mechanism is relatively complicated.

Vacuum pump unitManufacturer: transmission mode of pump

The two rotors of the vacuum pump are relatively synchronized through a pair of high-precision gears. The driving shaft is connected with the motor through a coupling. There are two main types of transmission structure layout: One is that the motor and the gear are placed on the same side of the rotor as shown in the figure. The driven rotor is directly transmitted by the motor end gear, so that the torsional deformation of the driving rotor shaft is small, the gap between the two rotors will not be changed due to the large torsional deformation of the driving shaft, so the gap between the rotors is in operation. Uniform in the process. The major disadvantages of this transmission mode are: a. There are three bearings on the driving shaft, which increases the difficulty of processing and assembly of the pump, and it is inconvenient to disassemble and adjust the gear; B. the overall structure is not symmetrical, and the middle of the pump is biased towards the motor and the gear box.

Vacuum pump unitManufacturer: characteristics of vacuum pump

Vacuum pump unitManufacturer: Features of a vacuum pump

In a wide range of pressure has a larger pumping speed;

Vacuum pump unitManufacturer: Characteristics of vacuum pump II

The rotor has good geometric symmetry, so the vibration is small and the operation is stable. There are gaps between the rotors and between the rotor and the housing, no lubrication, low friction loss, which can greatly reduce the driving power, thereby achieving a higher speed;

Vacuum pump unitManufacturer: Characteristics of vacuum pump three

The pump cavity does not need to be sealed and lubricated with oil, which can reduce the pollution of oil vapor to the vacuum system;

Vacuum pump unitManufacturer: Five characteristics of vacuum pump

There is no compression in the pump chamber and no exhaust valve. The structure is simple and compact, and is not sensitive to dust and water vapor in the pumped gas;

Vacuum pump unitManufacturer: Characteristics of vacuum pump six

The compression ratio is low, and the effect of hydrogen gas extraction is poor;

Vacuum pump unitManufacturer: seven characteristics of vacuum pump

The surface of the rotor is a complex curved cylindrical surface, which is difficult to process and inspect.