working principle:

The air suspension fan is a centrifugal fan in which the air will produce a dynamic pressure effect between the rotor and the foil bearing surface when the blower rotor rotates at a high speed, forming a high-pressure air film and supporting the rotor. Because the passive oil-free air suspension bearing is adopted, no lubrication device is required, and the structure is simple and accurate.

Air suspension fan is a product extending from the technology of aircraft turbine engine. Its main core technologies are air suspension bearing technology, high-speed permanent magnet synchronous motor and its control technology. The air suspension bearing takes air as the working medium, elastic flat foil (top foil) as the supporting surface, and elastic wavy foil (wavy foil) as the supporting member.

Core technology:

1、 Ultra efficient permanent magnet high-speed motor technology: Retz permanent magnet synchronous motor It has a high efficiency of more than 95%, which is different from other motors in that it has a very good cooling effect. We have developed a more efficient permanent magnet high-speed motor technology in the world through 15 years of time and experience, and its working efficiency is as high as 95% - 96%. It has been verified by the calculation of several practical application case data, The calculation results prove that the Leitz air suspension centrifugal blower saves more energy than the Roots blower, and some enterprises can recover their investment costs within one year.

2、 Air suspension bearing technology: Suspension bearing, without lubricating oil and mechanical friction, has a semi permanent service life. There is no mechanical noise, no mechanical vibration, and only air is conveyed. Since 2000, it has been widely used in industrial machinery. Its structure is simple. Compared with oil bearing, it can operate stably at high temperature. It has better levitation capability in permanent magnet high-speed motors, and does not need complex sensor systems.

3、 Aviation aluminum alloy impeller: The Leitz air suspension fan adopts high-strength aviation aluminum alloy impeller to facilitate high-speed operation in the air suspension bearing. The design precision can reach 0.001mm to ensure the operation efficiency. The surface adopts hard anode and other treatment methods to maintain stable operation even in harsh environments.

4、 Motor cooling technology: Leitz air suspension motor adopts 2-section cooling structure system, which has more stable cooling effect. The first section is air cooled inside the motor, and the second section is effectively cooled in the air bearing assembly of the motor. This powerful 2-section cooling system structure does not need additional auxiliary cooling equipment in our motor (such as externally connected forced cooling fan, etc.)

5、 Level 2 compression technology: Level 1 air compression technology is used for pressure below 1.2kg, and level 2 air suspension bearing compression technology is used for pressure between 1.2kg and 4kg, which has high efficiency.

(Six hard core technologies of Leitz air suspension fan, and some project data show that it can save more than 30% energy than traditional blower)

Product features:

1. Energy conservation and environmental protection: The Leitz air suspension fan is more energy-saving than the traditional fan, and has obvious energy-saving advantages compared with similar fans.

2. High efficiency: The permanent magnet synchronous motor is equipped with a three-way flow turbine, which makes the comprehensive efficiency up to 87%. It is a national second-class energy efficiency equipment product.  

3. Environmental protection and low noise: Small size, light weight, no mechanical friction, no mechanical vibration, no oil stain, noise lower than 85dB, and noise of traditional fan higher than 100dB.

4. Simple construction: Pure mechanized design, no bearing controller and proximity sensor, simple wiring; Direct drive, passive suspension, low failure rate, no mechanical noise and vibration, simple air delivery.

5. Ultra long life: Integrated design, modular management, simple structure, small size, high efficiency, unattended, maintenance free, and semi permanent service life under normal conditions.

6. Carbon reduction and cost reduction: One 37kW fan is used in an operation project, which saves about 190000 kilowatt hours of electricity annually, saves about 100000 yuan of electricity annually (recover the cost of the machine in one year), saves about 23 tons of standard coal for power generation, and reduces about 172 tons of carbon emissions.

Case sharing: Guangzhou Kangshifu Large Sewage Treatment Station

Project information: Master Kang Group, a leading enterprise in Taiwan's famous beverage industry, whose production plant in Guangzhou Luogang Development Zone is a beverage production center radiating the entire South China region. It has advanced filling production lines and the best production efficiency in the country. There is a large sewage treatment station in the plant. The oxygen consumption tank of the sewage station uses the traditional roots blower for aeration, To ensure the smooth progress of biological reaction in the tank and achieve the purpose of sewage treatment.

In recent years, with the change of national policies and the increasingly fierce market competition, energy conservation and emission reduction and reducing production costs have become important means for enterprises to improve market competition. In the early stage, the customer used Leitz's air knife drying system in the production line for code printing and package label drying processes, and achieved good energy saving results. It was learned that Leitz is also producing air suspension centrifugal blowers for sewage treatment, and hopes that Leitz can help customers achieve greater energy savings.

(Live photos before and after reconstruction)

(Leitz field survey and model selection)

Transformation effect: One Leitz air suspension blower is installed in the sewage station, one of the original fans is removed, and one is used and three are standby. After transformation, the Leitz air suspension blower can save 199788 yuan of electricity expense every year, which can be conservatively estimated. The investment cost can be fully recovered within 12 months, and a large amount of manual maintenance cost can be saved. The noise in the machine room is reduced to below 80 decibels, Comply with the latest noise emission standards required by the environmental protection department. It greatly reduces the operation cost of the factory and makes the enterprise gain greater advantages in the market competition.

(Comparison chart of data before and after reconstruction)

Installation and maintenance:

When the equipment is running, there is almost no vibration, no need to use ground anchors or other additional operations. Place the equipment at the required place to connect the power supply and pipes, and then the horizontal feet can be adjusted under the blower to facilitate leveling and installation.