How to ensure the stable and long-lasting operation of the molecular vacuum pump

 As a kind of vacuum obtaining equipment, molecular vacuum pumps (hereinafter referred to as molecular pumps) have become the mainstream equipment in clean high vacuum and ultra-high vacuum applications because of their stable and reliable operation and good pumping efficiency in molecular flow. They are widely used in scientific instruments and industrial production.

 Before entering the 21st century, molecular pumps mainly existed in the fields of scientific research and national defense and military industry.In the past ten years, with the rise of emerging industries such as coating, energy-saving lamps, and display screens, molecular pumps have gradually emerged in the civilian field and achieved rapid development. 2

In particular, the continuous advancement of the localization process of the semiconductor industry and the growth of demand for new energy lithium batteries and photovoltaic equipment have made the market size of the domestic molecular pump industry has been on the rise.Relevant institutions predict that by 2026, the market size of China's molecular pump industry will reach 3.10 billion yuan.

In recent years, molecular pumps have developed in the direction of intelligence, flexibility and efficiency. On the basis of traditional molecular pumps, products such as magnetic levitation molecular pumps with non-contact support, high efficiency and high life have been widely used.While the core technology of the product is vigorously developed, the supporting products and services are also moving towards a more professional, economical and efficient humanization direction, which is also one of the trends in the development of market competition.

 How the molecular pump works

The pumping mechanism of molecular pumps is different from that of mechanical pumps that rely on changes in the volume of the pump chamber for pumping.The molecular pump is based on the principle of momentum transfer. It rotates at high speed under the drive of a variable frequency power supply driven by a motor. The gas molecules in the molecular flow area collide with the surface of the high-speed rotating blade, and the momentum is transmitted to the gas molecules, causing some gas molecules to flow in a directional manner and be discharged out of the pump, so as to achieve the purpose of pumping.

Molecular pumps are used in the range of high vacuum and ultra-high vacuum (about 10-1~10-8Pa) and cannot be used directly at atmospheric pressure. Their normal operation requires a certain starting pressure (the starting pressure of molecular pumps is generally 0.1~100Pa). Usually, a low vacuum pump type needs to be connected as a pre-stage pre-pumping vacuum pump.The molecular pump unit is a combined vacuum equipment composed of a molecular pump as the main pump, a rotary vane pump and a scroll pump as the pre-stage pump in series, which can quickly obtain a high vacuum in a confined space after operation.

According to the structure and working principle, molecular pumps can be divided into three types: turbomolecular pumps, traction molecular pumps and composite molecular pumps.

Professionalism of molecular pump maintenance

Although molecular pumps have entered all aspects of the industrial field, many people are not familiar with them on the application side.Unlike traditional oil diffusion pumps, molecular pumps are a kind of high-precision mechanical equipment.For example, the molecular pump pumping unit part, where the minimum gap is less than 0.5mm, and the maximum is not more than 3mm.Moreover, the spindle accuracy of the molecular pump is on the order of micrometers, and trace amounts of deformation will cause equipment failure. 2

In addition, the molecular pump has clear requirements for start-up inspection, storage temperature and relative humidity, and disassembly steps.Its complex theory and structure determine the difficulty of maintenance, repair and maintenance of molecular pumps.Only by understanding and mastering professional knowledge theory and practical experience can the molecular pump work stably and permanently.

 In summary, high-quality molecular pumps require technical support from a professional maintenance team to obtain a longer equipment utilization rate and a lower equipment failure rate.In practical applications, this work is generally done by molecular pump equipment manufacturers.Therefore, the after-sales service of molecular pumps is an indispensable part of the product itself for customers.

How to order a molecular pump?

Xiamen Taixing provides laboratory equipment, laboratory consumables, scientific instruments, and industrial manufacturing equipment in the field of clean high vacuum and ultra-high vacuum applications.

If you are interested in our molecular pumps or have any questions, please write an email to vacuunpump@xiamenbest.com , We will get back to you as soon as possible.