【 Performance Comparison 】
Performance comparison
Roots blower
Multistage centrifugal air blower
Single stage centrifugal blower
Air suspension blower
Imported maglev blower
Esurging maglev blower
Bearing
Bearing
Ball bearing
Ball bearing
Tilting-pad bearing
Air foil bearing
Imported magnetic bearing, mature technology, high stability
First magnetic bearing developed independently in China, mature technology, high stability
Technology source
Made in China
Made in China
Import/domestic
Republic of Korea
Europe
Tsinghua University
Service life
1-2 years
2-3 years
3-5 years
3-5 years
Semi-permanent
Semi-permanent
Mechanical loss
2% energy consumption of bearing
2% energy consumption of bearing
Above 3% energy consumption of sliding friction
Dry friction at low speed, high energy consumption
Electromagnetic induction, low energy consumption of bearing
Electromagnetic induction, low energy consumption of bearing
Impeller
Type
Casting 2 or 3 blades
Welding steel or casting aluminum
Aluminum alloy three-dimensional flow impeller
Aluminum alloy three-dimensional flow impeller
Aluminum alloy three-dimensional flow impeller
Aluminum alloy three-dimensional flow impeller
Service life
5-8 years
10 years
15 years
20 years
20 years
20 years
Aerodynamic efficiency
Low
Low
Medium
High
High
High
High-speed motor
Motor type
Low-speed asynchronous motor
Low-speed asynchronous motor
Asynchronous ac motor
High-speed permanent magnet motor
Purchased high-speed permanent magnet motor
High-speed permanent magnet motor independently developed
Transmission type
Belt or coupler
Coupler
Coupler
Direct driving
Direct driving
Direct driving
Motor efficiency
86%
87%
94%
95%
97%
Above 97%
Speed control
unavailable
unavailable
unavailable
Precise control of speed
Precise control of speed
Precise control of speed
Speed control method
There is no speed control system. When motor power and rotation speed are fixed, the air volume is fixed
No speed control system unless the variable frequency motor is replaced and the variable frequency converter is added
Guide vane adjustment, mechanical loss
Intelligent DC speed control system changes the speed of the shaft
Intelligent DC speed control system changes the speed of the shaft
Intelligent DC speed control system changes the speed of the shaft
Working range
Very small
Very small, it can bebroadenedby adding a frequency converter
Small range of adjustment of air flow and pressure
Wide range of adjustment of air flow and pressure
Wide range of adjustment of air flow and pressure
Wide range of adjustment of air flow and pressure
Installation
Lifting
Need
Need
Need
No need
No need
No need
Foundation
Need
Need
Need
No need
No need
No need
Maintenance
Lubricant
Check every shift, add regularly, medium cost
Check every shift, add regularly, medium cost
Check every shift, add regularly, high cost
No need
No need
No need
Quick-wear part
Bearing, gear
Bearing, sealing
Bearing, gear, lubricant pump
Bearing, filter
Air filter
Air filter
Cost
Low
Medium
High
High, no maintenance in China
Low, poor service timeliness
Low, good service timeliness
Operation
Operation cost
Very high
High
Medium
Low
Very low
Very low
Investment cost
Very low
Medium
High
High
High
High
Overall efficiency
49%
61%
68%
73%
77%
77%
Overall price
Low
Medium
High (imported blower)
Medium
Very high, 1.3~1.5 times of the domestic
Medium
After-sale maintenance
Short cycle, low cost and high failure rate
Short cycle and high cost
Long maintenance period and high cost
Long maintenance period and high cost
Long maintenance period and high cost
Timely maintenance, independent core components, short maintenance cycle and low cost
Performance comparison
Roots blower
Multistage centrifugal air blower
Single stage centrifugal blower
Air suspension blower
Imported maglev blower
Esurging maglev blower
Bearing
Bearing
Ball bearing
Ball bearing
Tilting-pad bearing
Air foil bearing
Imported magnetic bearing, mature technology, high stability
First magnetic bearing developed independently in China, mature technology, high stability
Technology source
Made in China
Made in China
Import/domestic
Republic of Korea
Europe
Tsinghua University
Service life
1-2 years
2-3 years
3-5 years
3-5 years
Semi-permanent
Semi-permanent
Mechanical loss
2% energy consumption of bearing
2% energy consumption of bearing
Above 3% energy consumption of sliding friction
Dry friction at low speed, high energy consumption
Electromagnetic induction, low energy consumption of bearing
Electromagnetic induction, low energy consumption of bearing
Impeller
Type
Casting 2 or 3 blades
Welding steel or casting aluminum
Aluminum alloy three-dimensional flow impeller
Aluminum alloy three-dimensional flow impeller
Aluminum alloy three-dimensional flow impeller
Aluminum alloy three-dimensional flow impeller
Service life
5-8 years
10 years
15 years
20 years
20 years
20 years
Aerodynamic efficiency
Low
Low
Medium
High
High
High
High-speed motor
Motor type
Low-speed asynchronous motor
Low-speed asynchronous motor
Asynchronous ac motor
High-speed permanent magnet motor
Purchased high-speed permanent magnet motor
High-speed permanent magnet motor independently developed
Transmission type
Belt or coupler
Coupler
Coupler
Direct driving
Direct driving
Direct driving
Motor efficiency
86%
87%
94%
95%
97%
Above 97%
Speed control
unavailable
unavailable
unavailable
Precise control of speed
Precise control of speed
Precise control of speed
Speed control method
There is no speed control system. When motor power and rotation speed are fixed, the air volume is fixed
No speed control system unless the variable frequency motor is replaced and the variable frequency converter is added
Guide vane adjustment, mechanical loss
Intelligent DC speed control system changes the speed of the shaft
Intelligent DC speed control system changes the speed of the shaft
Intelligent DC speed control system changes the speed of the shaft
Working range
Very small
Very small, it can bebroadenedby adding a frequency converter
Small range of adjustment of air flow and pressure
Wide range of adjustment of air flow and pressure
Wide range of adjustment of air flow and pressure
Wide range of adjustment of air flow and pressure
Installation
Lifting
Need
Need
Need
No need
No need
No need
Foundation
Need
Need
Need
No need
No need
No need
Maintenance
Lubricant
Check every shift, add regularly, medium cost
Check every shift, add regularly, medium cost
Check every shift, add regularly, high cost
No need
No need
No need
Quick-wear part
Bearing, gear
Bearing, sealing
Bearing, gear, lubricant pump
Bearing, filter
Air filter
Air filter
Cost
Low
Medium
High
High, no maintenance in China
Low, poor service timeliness
Low, good service timeliness
Operation
Operation cost
Very high
High
Medium
Low
Very low
Very low
Investment cost
Very low
Medium
High
High
High
High
Overall efficiency
49%
61%
68%
73%
77%
77%
Overall price
Low
Medium
High (imported blower)
Medium
Very high, 1.3~1.5 times of the domestic
Medium
After-sale maintenance
Short cycle, low cost and high failure rate
Short cycle and high cost
Long maintenance period and high cost
Long maintenance period and high cost
Long maintenance period and high cost
Timely maintenance, independent core components, short maintenance cycle and low cost