What are the reasons for the increased vibration of high-pressure roots blower?

What is the reason for the increased vibration of high-pressure roots blower?

(1) Design reason: Roots blower is generally designed according to the use environment, temperature, air volume, air pressure, medium, etc. However, some enterprises that choose high-pressure roots blowers are not completely based on these factors, resulting in the following factors: improper blower design, poor dynamic characteristics, and large vibration during operation; Unreasonable structure and stress concentration; The design working speed is close to or falls into the critical speed range; Inaccurate thermal expansion calculation will lead to poor thermal alignment.

(2) The manufacturer's reason: the manufacturer's quality management requirements for the fan also affect the operation of the fan, such as: the parts are processed and the product manufacturing is poor, and the precision is not enough; Poor material, insufficient strength and manufacturing system defects of parts; The rotor dynamic balance does not meet the requirements of science and technology.

(3) Reason for installation and maintenance: the installation accuracy of root blower plays a vital role in the operation of fan. If the installation accuracy does not meet the installation requirements, it will damage the operation of the high-pressure roots blower. The following factors exist during the installation of the fan, such as improper mechanical installation, misplaced parts, large preload, poor shaft alignment, improper adjustment of coordination clearance, excess and relative position, improper rotor placement, dynamic balance accuracy changes, failure to maintain as required, and damage to the original coordination nature and accuracy of the machine.

(4) Operation and operation reasons: During the use of high-pressure roots blower, the maintenance of blower plays a decisive role in the operation quality of high-pressure roots blower. When the process parameter deviates from the design value, the machine operation status is abnormal; Overspeed and overload operation of the machine, changing the working characteristics of the machine; Poor lubrication or cooling; Partial damage or scaling of rotor; Improper operation, uneven thermal expansion or too long stay in key areas during startup/shutdown or acceleration/descent.

(5) Cause of machine aging: general equipment has a certain number of years in use, and equipment performance will age after reaching a certain number of years. It is also applicable to high-pressure roots blower. During long-term operation, rotor deflection increases or dynamic balance deteriorates; The rotor is partially damaged, fallen off or cracked; Wear, pitting or corrosion of parts, insufficient interference or looseness, such as uneven settlement of damaged machine foundation and deformation of machine shell.