HB Series Air-Suspended Blower

Introduction to Core Technologies

Air bearing

High-speed centrifugal impeller

Permanent Magnet Synchronous Motor

Speed control system

High-speed permanent magnet synchronous motor

The efficiency of a typical AC induction motor is 85%, while the four-pole permanent-magnet synchronous motor from Rongheng Company has an efficiency of ≥97%. The efficiency of a typical two-pole motor is 95%. Judging solely by the motor’s efficiency, energy savings can range from 5% to 10%.

Rongheng Company’s permanent-magnet synchronous high-speed motors utilize air bearings, enabling the rotating shaft to achieve speeds ranging from 10,000 to 200,000 revolutions per minute (10,000–200,000 RPM). These motors offer ultra-high-speed operation and provide high energy density. Moreover, our company’s permanent-magnet synchronous high-speed motors not only have large capacities but also feature compact sizes.

Air suspension bearing technology is mature and reliable.

The high-temperature solid lubricant technology used in Rongheng Company’s air bearings enables them to withstand over 20,000 continuous on-off cycles under both high- and low-temperature conditions, making these bearings semi-permanent. Air bearings feature no mechanical contact, eliminate the need for a lubrication system, and require no regular maintenance, thus ensuring long-term stable operation.

Air bearing technology—first pioneered by NASA—has been in routine use in the cooling systems of Boeing aircraft in the United States for nearly two decades, and the technology is now highly mature.

High-speed and high-efficiency centrifugal impeller

The impeller efficiency can reach 92%, and the fan compression efficiency (including the volute, impeller, and diffuser) can reach 84%. When operating conditions change, the blower’s efficiency decreases by less than 2%.

Adopting advanced manufacturing processes: The impeller is machined using a five-axis CNC machining center.

The material is made of aerospace-grade aluminum alloy, which boasts high strength, low inertia, and high reliability.

Connection method: The impeller and the motor are directly connected, ensuring high efficiency.

The impeller has a service life of over 20 years.

Intelligent speed control system

When the external load varies (high load/low load/no load), the inverter automatically adjusts the motor speed and modifies the pressure and flow rate to ensure optimal operating conditions. Depending on changes in the working environment, using an inverter can help save energy by 15% to 40%.

The motor controller (inverter) can accurately adjust the motor speed even in high-temperature environments, delivering precise control performance.

When used with a permanent-magnet synchronous motor, the inverter features low noise, zero vibration, and a low starting current (starting at 5% of the rated current). The inverter’s efficiency reaches 97%.

The development history of wind turbines

Fan Performance Comparison

Advantages of Air-Suspended Fans

High efficiency and significant energy savings; low noise, optimizing the working environment.

The high-efficiency impeller and the ultra-high-speed motor are directly connected via air bearings, eliminating the need for a gearbox and lubrication system. This design features non-contact operation with no mechanical friction, resulting in low vibration and minimal operational noise, thus obviating the need for cumbersome soundproofing measures. Equipped with a BLDC motor and a variable-frequency speed control system, the unit precisely regulates rotational speed to control flow rate and pressure, maintaining high efficiency across the entire operating range of the fan.

Save space and reduce investment in auxiliary facilities.

The smallest fan room area; lightweight equipment and simple foundation construction allow for flexible layout options as needed—for example, the blower room can be directly built above the aeration tank, which helps save on pipeline investment and reduce pipeline resistance losses.

Simple operation and high degree of automation

The fan itself performs self-checks on parameters such as rotational speed, pressure, temperature, and flow rate, and is equipped with features to prevent surge, enabling fully automated, unattended operation. Within the fan’s operating range, the fan’s air volume and pressure output can be freely adjusted in response to external control signals. The fan does not require any additional local control cabinets or soft-start cabinets—instead, it comes equipped with an integrated local control system. The main control panel installed in the fan room, via a computer CPU, can automatically and continuously adjust pressure, flow rate, control startup sequences, and issue alarms for potential issues, thereby enabling automatic, coordinated control of both single and multiple fans simultaneously. Furthermore, the fan can also be remotely controlled from a central control room. With just a brief training session, relevant technical personnel can set up the fan according to the procedures outlined in the operation manual, allowing the fan to automatically start up and operate unattended.

No lubricant required, maintenance-free, and highly reliable equipment.

Thanks to the adoption of a leading-edge, ultra-high-speed permanent-magnet synchronous motor directly connected to the impeller and hydrodynamic air-bearing technology, system failures caused by gearboxes, oil lubrication systems, and other components have been eliminated. By using air-floating bearings, the equipment operates without mechanical friction, requires no lubricating oil, and thus eliminates the need for maintenance and servicing. Key components are made from high-quality materials, and standardized, precision manufacturing ensures that the equipment delivers consistently outstanding performance, boasts high reliability, and has an extended service life.

Introduction to Rongheng Air Suspension Fan Products

The air-bearing high-speed centrifugal fans designed and manufactured by Nantong Rongheng Environmental Protection Equipment Co., Ltd. are domestically produced fan equipment that boasts complete independent intellectual property rights. After more than five years of intensive research and development, the company now offers over ten series of blowers ranging from 25 horsepower to 400 horsepower, as well as four series of vacuum pumps. Products currently under development include axial flow fans for cement kiln grate coolers and high-pressure air compressors, among others. These products are already widely used in industries such as wastewater treatment, cement, papermaking, textiles, chemical engineering, pharmaceuticals, and food processing. With outstanding performance and reliable quality, they have received widespread acclaim and unanimous praise from users.

Product Structure

Intelligent Inverter Cooling System

The Rongheng series products feature a breakthrough in technology with their dual-cooling system, which eliminates the need for additional motor cooling devices. Moreover, the variable-frequency drives themselves are equipped with an intelligent variable-frequency cooling system. A unique and simple structure—where the cooled air from the variable-frequency drive is combined with the cooled air from the motor and then discharged together to the product’s exterior—ensures the cooling system operates efficiently. In addition, globally recognized brands of variable-frequency drives that have obtained CE and UL certifications (such as Japan’s Yaskawa, Germany’s Siemens, the Netherlands’ WEG, and South Korea’s Hyundai) are incorporated into customized systems to meet customers’ specific requirements.

Inhalation filtration system

In the Rongheng series products, intake air first passes through a non-woven fabric filter layer and then through a filter cartridge, effectively preventing foreign particles—including fine dust—from being filtered and inhaled. In pause operation mode, the filter cartridge can be replaced very easily, thereby maximizing user convenience and system stability.

Rongheng Products' Competitive Advantages

The air-suspension high-speed centrifugal fans designed and manufactured by Nantong Rongheng Environmental Protection Equipment Co., Ltd. are domestically produced fan equipment with fully independent intellectual property rights. Compared to similar imported products and magnetic-levitation products, these products boast the following advantages in terms of advanced technology and the self-designed and self-manufactured core components:

Motor advantages: The Rongheng air suspension fan uses a four-pole permanent-magnet synchronous motor with an efficiency exceeding 97%, offering smooth operation and enhanced reliability. Other brands of fans typically use two-pole motors, which generally have an efficiency of around 95%.

Advantages of inverters: Rongheng fans use inverters with higher frequencies—typically 1000 Hz or 1600 Hz—which offer superior technical performance and ensure smooth, reliable operation. Imported fans generally employ inverters at 400 Hz or 600 Hz, which exhibit poorer technical performance and operational stability.

Inductance advantages: The Rongheng air suspension fan is equipped with a filtering system that significantly enhances the product's immunity to disturbances in the power supply, making it better suited to meet the varying demands of different power grids. This results in improved adaptability to diverse working environments and greater system stability. Other fans generally do not come equipped with this feature.

Impeller advantages: Rongheng Fans employs a high-efficiency five-axis milled compressor impeller, which boasts a wider range of high-efficiency performance, strong adaptability for selection, high impeller strength, and long service life. In contrast, imported fans typically use cast impellers, which suffer from reduced performance, higher airflow noise during operation, and lower fatigue resistance.

Bearing advantages: Rongheng independently designs and manufactures air-bearing suspensions that boast excellent performance, controllable quality, and high reliability. Compared to other externally sourced bearing manufacturers, Rongheng enjoys advantages such as shorter production cycles, higher supply efficiency, and guaranteed product delivery. In comparison to magnetic levitation bearings, air-bearing suspensions offer the advantages of simpler structure, lower cost, and higher reliability.

Noise advantage: Rongheng Fans has implemented active noise reduction design specifically aimed at noise reduction, adopting engineering-based noise control measures for each noise source, enabling its noise levels to be reduced below 75 decibels. By contrast, the noise levels of other fans typically exceed 80 decibels, highlighting Rongheng Fans' distinct advantage in noise control.

Specification and Performance Parameter Table (Performance Table)

Partial on-site installation demonstration

Keywords: High-temperature Roots blower, Biogas booster fan