Troubleshooting and analysis of Multistage centrifugal blower

No.

Fault performance

Cause of failure

Troubleshooting methods

1

High bearing temperature

Bearing wear

Replace the bearing

Poor bearing installation

Adjust the bearing installation clearance

Ambient temperature too high

Increase ventilation facilities

Wrong bearing model

Confirm the bearing model and grade

Deterioration and failure of lubricating oil

Replace the lubricating oil

Too much or too little lubricating oil

Drain or add oil as required

Wear of bearing pedestal

Replace the bearing pedestal

Bearing gland wear

Replace the bearing gland

2

The air capacity decreases and the pressure is low

Large sealing clearance

Adjust the clearance value or replace the seal

The inlet filter may be plugged

Clean the filter or replace the filter medium

Intake air density may increase

Measure the gas density and eliminate the cause

Intake air temperature increases

Increase ventilation facilities

Pipeline leakage

Check pipe connections

3

High motor current

The air capacity increases or the exhaust pipe leaks, and the density of transmitted gas increases

Check the system piping

The coupling is not concentric

Realign

Motor itself causes

Check the motor

4

Excessive bearing vibration

The base bolt is screwed

Loosen the foot bolt

Bearing wear

Replace the bearing

Friction between stator and rotor

Consult manufacturer

Base grouting

Eliminate

Incorrect position or failure of damping pad

Adjust the correct position or replace

The pipe weight acts on the blower

Use elastic soft connection

Poor alignment of coupling

Re centering

False Foundation

Remake the foundation

Loose connecting bolts between motor or blower and base

Fastening bolt

When entering the surge area, the working or load changes sharply

Check or adjust the blower performance to adapt to load changes

Motor vibration

Check the motor

Coupling damage

Replace the coupling diaphragm or adjust the axial spacing of the coupling

Rotor balance is damaged

Balance the rotor

5

Oil leakage

Oil level too high

Refuel as required

Incorrect oil model

Use the specified type of lubricating oil

Oil seal failure

Replace the oil seal

Oil level sight glass broken

Replace the oil level sight glass

The oil return hole is blocked

Shutdown and inspection

The oil drain hole of the oil seal is misaligned with the oil return air of the bearing seat

Adjust the oil seal position

6

Surge

Inlet pipe blocked

Check inlet piping components

Outlet pipe blocked

Check outlet piping components