Both Roots blower and Ye blower belong to the category of positive displacement blowers, but there are significant differences between the two in terms of structure, performance, and application. Here is a detailed comparative analysis of them:
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**1、 Core structural differences**
|* * Comparison item * * | * Roots blower * * | * Ye blower * *|
|------------------|-------------------------------|-------------------------------|
|* * Rotor type * * | 2 or 3 straight blade rotors (involute) | 1 impeller (similar to a centrifugal impeller)+1 wind blocking wing wheel|
|* * meshing method * * | Non contact meshing between rotors (gap 0.1~0.3mm) | Impeller and wind blocking wing wheel tightly fit (smaller gap)|
|* * Sealing * * | Low, with internal leakage | High, with smaller leakage volume|
|* * Typical structural diagram * * |! [Roots structure]（ https://example.com/roots ) | ! [Ye's structure]（ https://example.com/yeshi ) |
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**2、 Performance comparison**
|* * Parameters * * | * Roots blower * * | * Ye blower * *|
|------------------|-------------------------------|-------------------------------|
|* * Pressure range * * | 9.8~98 kPa (0.1~1.0 bar) | 9.8~49 kPa (0.1~0.5 bar)|
|Flow range * * | 1~300 m3/min | 0.5~50 m3/min|
|* * Efficiency * * | Volume Efficiency 80-90 | Volume Efficiency 85-95|
|* * Noise * * | High (85-95 dB) | Low (75-85 dB)|
|* * Pulsation * * | Obvious (Three leaf type can be weakened) | Slight|
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**3、 Differences in working principles**
1. Roots blower:
-By the reverse rotation of two parallel rotors, gas is "wrapped" from the inlet and pushed to the outlet, without internal compression, and pressure is established by system resistance.
-* * Characteristics * *: Constant flow rate, strong pressure adaptability.
2. Ye's blower:
-The rotation of the impeller generates centrifugal force, and the gas is thrown towards the edge and intercepted and pressurized by the wind blocking impeller, resulting in partial internal compression.
-* * Characteristic * *: The airflow is smoother, but the pressure capacity is lower.
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**4、 Comparison of application scenarios**
|* * Scenario * * | * Roots blower applicability * * | * Ye blower applicability * *|
|------------------|-------------------------------|-------------------------------|
|Wastewater treatment aeration | ★★★★★ (high pressure demand) | ★★☆☆ (low pressure scenario)|
|Pneumatic conveying | ★★★☆☆ (large flow) | ★☆☆☆ (small flow precision conveying)|
|Vacuum Packaging | ★★☆☆☆ (Auxiliary Vacuum Extraction) | ★★★★★ (Low Vacuum Degree Requirement)|
|Chemical gas transportation | ★★★★★ (corrosion-resistant design) | ★☆☆☆ (limited to non corrosive gases)|
|Aquaculture oxygenation | ★★★★☆ (stable gas supply) | ★★★★★ (low noise demand)|
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**5、 Summary of advantages and disadvantages**
**Roots blower**
-Advantages:
-Wide pressure range, up to 0.1 MPa;
-Simple structure and low maintenance cost;
-Strong adaptability to dust and humid environments.
-* * Disadvantages * *:
-Significant noise and vibration;
-There is airflow pulsation (silencer required).
**Ye's blower**
-Advantages:
-Smooth operation and low noise;
-Small airflow pulsation, suitable for precise gas supply;
-Slightly higher efficiency (especially in low-pressure scenarios).
-* * Disadvantages * *:
-Limited pressure capacity (usually<0.5 bar);
-The structure is complex and the maintenance difficulty is high.
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**6、 Selection suggestions**
1. * * Preferred Roots blower * *:
-Requires * * higher pressure * * (>49 kPa) or * * high flow rate * * (>50 m3/min);
-The medium contains dust and high humidity (such as mining and sewage treatment).
2. * * Priority should be given to Ye's fan * *:
-Require * * low noise and low pulsation * * (such as laboratory and hospital gas supply);
-Low pressure, small flow precision control (such as vacuum packaging, electronics industry).
3. * * Alternative solution * *:
-If the pressure is greater than 0.1 MPa, a screw blower can be considered;
-If the flow rate is greater than 300 m3/min, a multi-stage centrifugal fan can be evaluated.
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**7、 Maintenance and Fault Comparison**
|* * Question * * | * Common faults of Roots blower * * | * Common faults of Ye blower * *|
|------------------|-------------------------------|-------------------------------|
|Rotor wear | Increase in blade tip clearance → Decrease in air flow | Friction between impeller and blocking wing wheel → jamming|
|Bearing failure | Excessive vibration (requiring regular lubrication) | Overheating of high-speed bearings (requiring cooling)|
|Sealing leakage | Aging of shaft seal (replacement of mechanical seal) | Failure of wind blocking wing wheel seal (complex repair)|
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**8、 Cost comparison**
-* * Procurement cost * *: Under the same parameters, the Yeshi fan is 20-30% higher than the Birtz fan;
-* * Operating cost * *: Ye's fan has slightly better efficiency (saving 5-10% electricity);
-* * Maintenance cost * *: Roots blowers have lower costs (simple structure, cheap spare parts).
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**Summary**
-Roots blower is a universal choice for high pressure, high flow, and high reliability, suitable for industrial extensive scenarios.
-Ye's fan is more suitable for the special needs of low pressure, low noise, and precision control.
-The final selection requires comprehensive consideration of parameters such as pressure, flow rate, medium characteristics, and noise budget, and consultation with professional manufacturers.
