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【 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

Aerodynamics  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

 Chracteristics and advantages

 

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