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CORE TECHNOLOGY

Air becomes
the bearing.

The hard part of a high-speed air foil blower is not reaching a high speed. It is making the bearing, motor, impeller and control system work as one physical system. Our four core technologies address exactly that.

01TECH STACK

Not four parts.
One system.

The bearing sets life and cleanliness, the high-speed motor sets the efficiency ceiling, the 3D impeller sets aerodynamic performance, and system integration determines whether they all work together in the real world.

Air foil bearing, foil strip and bearing housing
01

Air foil bearing

An air foil bearing carries the rotor, eliminating oil circuits and rolling elements at the source of friction, vibration and maintenance.

AIR FOIL BEARING
High-speed permanent-magnet motor stator and windings
02

High-speed PM motor

High efficiency, high power density and high temperature capability for continuous operation at 30,000–78,000 rpm.

HIGH-SPEED PM MOTOR
3D aerodynamic impeller
03

3D impeller

CFD iterations on blade angles and flow passages balance pressure ratio, wide operating range and low noise.

3D IMPELLER
CFD system integration model
04

System integration

Multi-physics simulation balances mechanical, aerodynamic, electromagnetic, thermal and vibration behaviour at the complete-machine level.

SYSTEM COUPLING
95%Motor efficiency
220°CInsulation class
78,000rpmMaximum speed
0oilOil-free lubrication
02DEEP DIVE

Take every critical part
apart.

How the air foil bearing carries the rotor, how the impeller is designed and how the complete machine is matched — these are the reasons an air foil blower can save energy for years, not just on a datasheet.

Air foil bearing — Figure 1
FIG. 01 · AIR FOIL BEARING
01 / AIR FOIL BEARING

Air foil bearings.
Carrying tens of thousands of rpm.

At operating speed, air is drawn into the wedge between the foil pads and the shaft, creating a hydrodynamic support that lifts the rotor. In normal operation, metal no longer touches metal, so no oil is required and there is no rolling-bearing wear.

During start-up and shutdown, the wear coating on the foil surface carries brief contact. This is why coating material, foil geometry and assembly precision matter so much in an air foil bearing.

0oil
μ-levelbearing clearance
Maintenance-freenormal operation
  • No oil circuit, no oil mist — suitable for cleanrooms and high-purity processes.
  • Hydrodynamic support damping suppresses high-frequency vibration and noise.
  • No mechanical bearings or grease, reducing whole-life maintenance cost.
High-speed permanent-magnet motor stator and rotor FIG. 02 — HIGH-SPEED PM MOTOR
02 / HIGH-SPEED PM MOTOR

Higher power density.
Lower loss at every step.

A high-speed air foil blower needs a motor that is equally light, fast and heat-tolerant. LANFENG uses a high-speed permanent-magnet synchronous motor platform with a titanium rotor and embedded samarium-cobalt magnets, achieving high strength, low weight and high temperature capability. A high-frequency drive converts electrical energy more directly into shaft power.

95%Peak efficiency
220°CInsulation class
78,000Max rpm
  • Permanent-magnet synchronous motor with variable-frequency control.
  • Titanium rotor and samarium-cobalt magnets balance strength, weight and heat resistance.
  • Low rotor inertia for faster start-up and process response.
LANFENG 3D impeller FIG. 03 — 3D IMPELLER
03 / 3D IMPELLER

Every blade follows
the direction of the air.

The impeller is the heart of aerodynamic efficiency. Using three-dimensional CFD, we balance flow, pressure, efficiency and noise: inlet and outlet blade angles, passage curvature and diffusion are adjusted to reduce separation and secondary flow, so more of the shaft power becomes useful air.

CFD3D simulation
Wide rangeEfficient window
Low vibrationPrecision balancing
  • 3D blade design balances design-point efficiency and part-load behaviour.
  • Impeller and rotor are balanced as an assembly for high-speed stability.
  • Blade parameters are tuned for drying, aeration and vacuum duty.
CFD flow simulation of an impeller FIG. 04 — CFD / SYSTEM COUPLING
04 / SYSTEM COUPLING

The best part is not
always the best machine.

A bearing, a motor and an impeller can each be excellent and still fight each other when assembled. System coupling puts mechanical structure, aerodynamics, heat, electromagnetics and vibration into one model, searching for a system-level balance instead of adding four “good parts” together.

4Coupled physics
1Machine model
27Model platform
  • Aerodynamic and electromagnetic co-optimisation for the best operating speed.
  • Thermal management designed in, controlling motor and bearing temperature rise.
  • Control strategy matched to impeller characteristics, widening the efficient range.
03VALIDATION

Performance is measured,
not written.

From components to the complete machine, key performance is verified before dispatch. We prefer test data to adjectives.

High-speed balancing

Rotor and impeller imbalance is controlled to reduce vibration and bearing load at speed.

01 / BALANCING

Full-speed test

Speed, pressure, flow, current and vibration are checked on the test stand.

02 / FULL-SPEED TEST

Thermal and noise

Temperature rise and noise are recorded at key operating points for site assessment.

03 / THERMAL & NOISE

Build consistency

Critical-process records and final inspection support repeatable, traceable delivery.

04 / CONSISTENCY

Test scope and acceptance criteria depend on model, order requirements and applicable standards.

TECHNICAL DISCUSSION

Want to discuss your process?
Our engineers are here.

Replacing scroll blowers, redesigning pipework or specifying a high-temperature or vacuum model — start with a concrete process conversation.

Talk to engineering View product matrix
LANFENG high-speed air foil blower
AIR FOIL TECHNOLOGY
ENGINEERED IN DONGGUAN