RICITE Technology bravely becomes a trendsetter of the times, striving to explore the path of magnetic levitation magnetic pumps

In 2022, a new outbreak of COVID-19 occurred suddenly, and the economy faced a severe test, with many enterprises facing enormous pressure. However, RICITE Technology bucked the trend and achieved a significant increase in production and sales year-on-year. Key products such as magnetic pumps, shielded pumps, pneumatic diaphragm pumps, and chemical pumps ranked first in sales, receiving unanimous praise from customers.

Achievements belong to the past, innovation wins the future. RICITE Technology is well aware that only by continuously innovating and starting businesses to meet the needs of the market in the new era can it continuously catch up with and surpass the industry. Therefore, in 2022, after strict design verification, extensive market research, and production testing, RICITE Technology has decided to carry out the design, research, and production of a new generation (fifth generation) magnetic pump - magnetic levitation bearing magnetic pump. We dare to be the first and be the trendsetter of the times, actively explore the path of magnetic levitation magnetic pump research and development, and achieve new breakthroughs.

In recent years, China has made great progress in the research and development of Maglev. The Maglev has been successfully tested, and the speed can reach nearly 600 km/h. The magnetic levitation line has been successfully tested on the "Zhonghua 6" lightweight suspension rail magnetic levitation technology verification vehicle. A permanent magnetic levitation line with a speed of up to 536 kilometers per hour will be built in Dalian, indicating that magnetic levitation technology has shifted from military, aerospace, and other fields to industrial and civilian industries. The dream of magnetic levitation has already come true.

/Magnetic levitation science popularization/

There are currently three types of magnetic levitation in the world:

One is the constant conductive magnetic levitation represented by Germany;

The second is the superconducting electric maglev represented by Japan, both of which require electricity to generate maglev power;

The third type is China's permanent magnet suspension, which utilizes special permanent magnet materials and does not require any other power support.

Because the vehicle body is not in contact with the track, there is no friction, no bumps or vibrations will occur, and no sound will be emitted. Only when the vehicle speed reaches a certain level, passengers will hear some sound generated by friction with the air. Magnetic motors have high traction, low noise, and good environmental protection effects. Compared with the synchronous linear motor drive technology commonly used in foreign maglev systems, the magnetic motor drive technology can save about 50% of energy and save construction costs of 20 million to 40 million RMB/kilometer.

It can be seen that our company has caught up with and surpassed the Vanguard International Semiconductor Corporation level in the field of Maglev, reaching the world level.

Magnetic levitation technology has broad application prospects in various fields, including aerospace, nuclear industry, chemical industry, military industry, etc. So, is there a place for magnetic levitation technology in the field of magnetic pumps? The answer is yes, the magnetic levitation magnetic pump is a good application.

-Character events-

Professor Li Guo Kun, a magnetic circuit expert, assisted in the research and development of Richter Technology's magnetic levitation magnetic pump.

Recently, Professor Li Kun, the founder of Li's push-pull magnetic circuit theory, and his team came to Richter Technology (Zhejiang) Co., Ltd. to assist in the research and development of Richter Technology's magnetic levitation magnetic pump. After theoretical research and on-site investigation, Professor Li is very confident in the production and research and development capabilities of Richter Technology.

Introduction: Professor Li Guokun

For over 40 years, I have been engaged in the research and development of magnetic mechanics theory and high-tech. In the past 20 years, I have mainly been engaged in the development of rare earth magnetic circuits and rare earth magnetic devices.

He has made outstanding and creative contributions in such high-tech fields as magnetic circuit, magnetic transmission, magnetic seal, magnetic suspension, magnetic pump, magnetic beneficiation, magnetic iron removal, magnetic Level sensor, energy-saving large electromagnet, etc.

In 1979, he invented the "pull push magnetic circuit" theory, which has always been at the forefront and is known as the "Li's pull push theory". Received the third prize of the National Invention Award and made first-class contributions to the Ministry of Aerospace Science. This invention has been widely used in multiple high-tech fields such as satellites, as well as in various civilian industries such as petrochemical, vacuum, and electromechanical industries.

Magnetic levitation magnetic pumps are a new trend in the pump valve industry, but they have also encountered many technical difficulties. Although facing numerous difficulties, the full assistance of professionals has brought motivation and confidence to the people of Richter Technology.

We will tirelessly invest our energy in the research and design of magnetic levitation magnetic pumps. Although there is a long and arduous task ahead, it is imperative

-Design Principles-

Utilizing magnetic field force to non-contact suspend the rotating shaft, revolutionizing the traditional magnetic pump support technology.

As is well known, the sliding bearings used to support the impeller and rotor on magnetic pumps, as well as the thrust rings used to withstand axial force, rely on the transported medium for lubrication and cooling. If the circulation system malfunctions, the pump will be quickly damaged, and in severe cases, serious accidents will occur.

Magnetic levitation bearing is a new type of bearing that utilizes electromagnetic force to stabilize the rotor and control the axis position through a control system.

Simply put, it means suspending the pump shaft without any contact, friction or wear, requiring no lubrication, and increasing the speed, thereby significantly improving pump efficiency, reducing energy consumption, and extending service life. It has advantages that other magnetic pumps cannot compare, greatly improving customer production efficiency and increasing production capacity.

/Basic Principles/

Magnetic levitation bearings are bearings that use magnetic field forces to non-contact suspend the rotating shaft. Contactless can avoid mechanical wear, reduce energy consumption, and reduce noise, thus having the advantages of maintenance free, high speed, high accuracy, and good dynamic characteristics. Its power consumption is about 1/10-1/100 of that of ordinary sliding bearings. The electronic control system can control the position of the shaft, adjust the damping and stiffness of the bearings, and ensure good dynamic stability of the shaft sleeve.

According to the suspension method, magnetic levitation bearings can be divided into passive magnetic levitation bearings (also known as passive magnetic levitation bearings) and active magnetic levitation bearings (also known as active magnetic levitation bearings). A bearing that uses only permanent magnets or superconductors for suspension is called a passive magnetic levitation bearing; The bearing that generates electromagnetic force through the power supply to suspend it is called an active magnetic levitation bearing.

The permanent magnet magnetic levitation bearing has a simple structure, low cost, and reliable use, but its stiffness is low, it cannot be stable in both axial and radial directions, and it will leave a coordinate instability;

Active magnetic levitation bearings have advantages such as high stiffness and stable operation, but they must be equipped with control systems.

Therefore, the combination of permanent magnetic levitation bearings and active magnetic levitation bearing pumps is a very valuable design solution for magnetic levitation pumps.

/Structural design/

The design of traditional magnetic pumps uses sliding bearings and shaft sleeves to support the weight of the shaft sleeve, impeller, and pump shaft. When thrust rings are used to withstand the axial thrust of the impeller, sliding bearings, shaft sleeves, and thrust rings are referred to as interchangeable parts and are key components for the service life of magnetic pumps. For a long time, although designers have continuously studied, improved, and improved the materials used for these friction pairs, no matter what material pairing is used, there is inevitably mechanical friction during high-speed operation, which limits the service life of the pump. So, only when this friction does not exist can the service life of the magnetic pump be greatly improved.

Magnetic levitation magnetic pump is a new type of magnetic pump developed based on the theory of magnetic levitation without contact support. The emergence of magnetic levitation magnetic pump has solved the above technical problems.

/Electromagnetic bearing/

The electromagnetic bearing adopts the design of repulsive electromagnetic bearings, and the body is composed of circular ferromagnetic laminations. The circumferential winding coil generates electromagnetic force after being energized. The inner circular side wall is equipped with a displacement sensor to detect the deviation signal of the shaft sleeve; There is an interface on the surface of the outer circle, which sends the detected deviation signal of the shaft sleeve to the external control device through the interface. The power amplifier controls the current in the magnet, thereby generating changes in electromagnetic force to suspend the shaft sleeve in the specified position..

Considering the corrosiveness of the conveying medium, the electromagnetic bearing is arranged and packaged through a stainless steel sleeve after assembly, with a wedge surface on the outer circle to fix the electromagnetic bearing on the bearing seat of the magnetic pump.

/Permanent magnet shaft sleeve/

The permanent magnet shaft sleeve is made of a ring shaped strong magnetic permanent magnet material neodymium iron boron, which is radially magnetized and mounted on a stainless steel permanent magnet shaft sleeve seat. After assembly, its outer circle is encapsulated through a sleeve. This component is installed on the pump shaft and transmits power through a key located on the pump shaft to synchronize its rotation with the pump shaft. After final assembly, there is a radial gap of 1-1.5mm between the electromagnetic bearing and the permanent magnet shaft sleeve. Based on the principle of isotropic repulsion, the high-speed rotating pump shaft is suspended in a set position using the repulsive force of its surface magnetic field, and monitored through an external controller. The circulating system inside the pump is only used to remove eddy current heat from the metal isolation sleeve.

/Permanent magnet thrust ring/

Traditional designs use thrust rings to balance the axial force generated by the impeller on a magnetic pump. The thrust ring on the magnetic levitation magnetic pump is a permanent magnet thrust ring structure, which is composed of a strong permanent magnet material neodymium iron boron that is radially magnetized and embedded on a stainless steel seat. After assembly, its surface is then packaged as a whole through a circular stainless steel sleeve. There is a gap of 1.5mm between the permanent magnet thrust ring and the electromagnetic bearing.

Therefore, the ideal path for the research and development of magnetic levitation pumps is to cooperate with permanent magnet magnetic bearings and active magnetic bearing pumps, and to scientifically and reasonably assemble permanent magnet material accessories.

-Looking forward to the future-

It will certainly drive the new trend of magnetic pump and open up a Xintiandi

Adhering to conventions can only stay put, and innovation can keep up with the times. The people of Richter Technology deeply understand the principles behind it, so they are fully committed to promoting the research and production of magnetic levitation magnetic pumps and bravely becoming trendsetters of the times. It is believed that the launch of Richter Technology's magnetic levitation magnetic pump will drive the new trend of magnetic pump and open up a new world。