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Cause and Treatment of Roots Blower Surge

Source: Roots blower manufacturer Released on: December 7, 2021 Hits:

Roots blower is a positive displacement fan. Therefore, the air volume will not change after running. When the current pressure changes slightly, it can also continue to deliver air.

Causes of Roots blower surge

After long-term use, the air volume of Roots blower will change, mostly due to the reduction of air volume. The main reason is that the clearance between impeller and impeller, between impeller and wallboard, and between impeller and casing will change, resulting in increased internal leakage, which will affect the air volume of Roots blower.

1. Design reason: Roots blower is generally designed according to the operating environment, temperature, air volume, air pressure, medium, etc. of the fan. Causes of the following factors: improper fan design, poor dynamic characteristics, and vibration during operation; Unreasonable structure and pressure concentration; The design working speed is close to or enters the critical speed area; Inaccurate thermal expansion calculation results in poor thermal alignment.

2. Manufacturing reason: the manufacturer's quality requirements for the fan will also affect the operation of the fan, such as poor manufacturing and manufacturing of parts and insufficient precision; Poor material quality, insufficient strength and manufacturing defects; The rotor dynamic balance does not meet the technical requirements.

3. Reason for installation and maintenance: the installation accuracy requirements of Roots blower play a vital role in the operation of the fan. If the installation accuracy does not meet the installation requirements, the operation of roots blower will be destructive. During the installation of the fan, the following factors exist, such as improper mechanical installation, misalignment of parts, and large preload; Poor shaft alignment; The matching clearance, interference and relative position adjustment of the machine are incorrect; The rotor is placed incorrectly, which changes the accuracy of dynamic balance; The original matching performance and machine precision were damaged because the maintenance was not carried out as required.

Roots blower

4. Operation and operation reasons: During the use of roots blower, the maintenance of the blower plays a decisive role in the operation quality of roots blower. If the process parameters deviate from the design values, the machine operation conditions are abnormal; The machine operates under overspeed and overload conditions, thus changing the operating characteristics of the machine; Poor lubrication or cooling; Partial damage or scaling of rotor; The critical part of the start stop or acceleration process is improperly handled, the thermal expansion is uneven or the residence time is too long.

5. Cause of machine aging: after reaching the aging level, the service life of general equipment will be shortened. Long term operation of roots blower, increase of rotor deflection or decrease of dynamic balance; Part of the rotor is damaged, falling off or broken; Wear, pitting or corrosion of parts.

Cause and Treatment of Roots Blower Surge

Cause and Treatment of Roots Blower Surge