Dry screw vacuum pump

Dry screw vacuum pump is a high-tech product mainly used in high-purity vacuum processes. It has extremely high vacuum degree and can adapt to harsh working conditions. It has the ability to extract condensable and particulate gas, and is particularly suitable for clean environments. It is also easy to perform anti-corrosion treatment and is particularly suitable for fields such as electronics, chemical engineering, biomedicine, metal processing, and food processing.

Brief introduction

The core part of the screw vacuum pump - the screw rotor, is designed and solved using a three-dimensional curved mathematical model. The solid body of the model is processed on a five coordinate linkage CNC equipment, with high accuracy, reliable quality, and stable performance, ensuring long-term trouble free operation of the product.

This product has a high market demand and will completely replace vacuum equipment with low technological content in more than 100 fields, including chemical, metallurgical, electronic, petroleum, aerospace, tools, papermaking, packaging, food, medicine, medical equipment, as well as information engineering, biotechnology, microelectronics, etc.

Performance characteristics

1. There is no medium in the working chamber, and a clean vacuum can be obtained.

2. The working chamber and screw rotor surface have anti-corrosion coatings, which can adapt to harsh working conditions.

3. The gas inside the pump is not compressed, making it suitable for extracting condensable gases.

4. A single pump can pump up to 1Pa from the atmosphere, greatly simplifying the vacuum system.

5. The water temperature has little effect on vacuum, saving over 90% of water and even not consuming water.

6. No fuel consumption, no dripping or leakage.

7. There is no friction between rotating parts, allowing for high-speed operation and a small overall size of the machine.

8. Simple structure and easy maintenance.

9. The extracted gas is directly discharged from the pump body, without polluting water or environmental pressure, making gas recovery more convenient.

10. Can be combined with Roots pumps and molecular pumps to form oil-free units.

Working principle

Similar to screw compressors, the working process of screw dry vacuum pumps can be divided into three stages: suction, compression, and exhaust. As the rotor rotates, each pair of meshing teeth completes the same working cycle one after another, and now we will explain with one pair of teeth.

Inhalation process

The male rotor rotates counterclockwise, while the female screw rotates clockwise. The upper rotor end face is the suction section, and the lower end face is the exhaust end face.

Compression process

The rotor end face is the exhaust end face. Here, the male rotor rotates clockwise and the female rotor rotates counterclockwise. The upper rotor end face is the suction section, and the lower end face is the exhaust end face.

Exhaust process

The exhaust process of a screw pump begins when the inter tooth volume is connected to the exhaust port. As the interdental volume continues to decrease, gas with exhaust pressure is gradually discharged through the exhaust port.