Dry screw vacuum pumps are vacuum pumps widely used in the industrial field. Their unique working principle endows them with a range of superior performance and application characteristics.

I. Working Principle:

The working principle of a dry screw vacuum pump is based on two main components: the main spindle and the screws.

1.The main spindle: The main spindle of a dry screw vacuum pump is typically composed of a pair of intermeshing spiral-shaped blades. The main spindle is driven by an electric motor, rotating rapidly to create a powerful negative pressure environment.

2.Screws: Inside the main spindle, there is a pair of rotating screws that synchronize with the main spindle. The pitch and shape of the screws correspond to the blades on the main spindle, forming a continuous sealing space that enables the continuous intake and exhaust of gases.

II. Working Process:

The working process of a dry screw vacuum pump can be divided into two stages: the suction stage and the exhaust stage.

1.Suction Stage: When the main spindle and screws start to rotate, air is drawn into the gaps between the screws. As the screws rotate, the air is gradually pushed towards the suction end of the pump. During this process, the gap between the screws and the main spindle decreases, resulting in the compression of the gas.

2.Exhaust Stage: Once the gas is compressed to a certain level, it enters the exhaust end and is discharged through the exhaust port. In this stage, the changes in volume created by the movement of the main spindle and screws facilitate the expulsion of the gas.


III. Application Fields:

Dry screw vacuum pumps are widely used in various industries due to their distinctive features:

1.Suitable for Various Gases: Dry screw vacuum pumps can handle different types of gases, including corrosive gases, flammable gases, and water vapor.

2.High Vacuum Level: Due to their optimized structure and working principle, dry screw vacuum pumps can achieve high levels of vacuum, meeting different process requirements.

3.Oil-Free Operation: Through design and sealing devices, dry screw vacuum pumps operate without the need for lubricating oil, eliminating oil usage and maintenance.

4.Low Noise and Vibration: The structural design of dry screw vacuum pumps ensures low noise and minimal vibration, making them suitable for environments with stringent noise requirements.

Dry screw vacuum pumps are a type of vacuum pump based on the working principle of the main spindle and screws. Through the gap between the rotating main spindle and screws, dry screw vacuum pumps are able to continuously intake and exhaust gases. Its superior performance and application characteristics have led to its widespread use in various fields such as chemical, pharmaceutical, electronics, and food industries.