What are the common faults of magnetic levitation blower and their solutions?

Common faults of magnetic suspension blower mainly focus on mechanical, electrical and control systems, and the following are some common faults and solutions:

Mechanical system failure

Bearing failure

Fault manifestations: the bearing temperature is too high, resulting in abnormal vibration and noise, which may lead to equipment shutdown in severe cases.

Cause analysis: insufficient lubrication or grease deterioration, improper installation of bearings, uneven bearing capacity, quality problems of bearings themselves, etc.

Solution: Check and replace the grease regularly to ensure good lubrication; Re-adjust the bearing installation position to ensure the installation accuracy; Check the bearing quality and replace it in time if it is damaged.

Impeller failure

Fault manifestations: the impeller is worn and corroded, and the impeller rubs against the casing, resulting in insufficient air volume and wind pressure and increased vibration.

Cause analysis: the transported gas contains impurities and particles, which leads to impeller wear after long-term operation; The gas is corrosive, causing corrosion to the impeller; Impeller installation deviation, too small clearance with casing.

Solution: install a filter device at the air inlet to prevent impurities from entering; Carry out anti-corrosion treatment on the impeller, such as spraying anti-corrosion coating; Adjust the installation position of impeller to ensure proper clearance. Impeller with serious wear or corrosion should be replaced in time.

Electrical system failure

Motor failure

Fault manifestations: the motor can't start, the motor is overheated, and the motor winding is short-circuited and open-circuited.

Cause analysis: power failure, such as lack of phase, too low or too high voltage; Motor overload operation; Motor insulation is damaged, damp or aging; The motor bearing is damaged, causing the motor to stick.

Solution: check the power supply line and repair the problems such as lack of phase and abnormal voltage; Check the load and adjust the operation parameters to avoid overload; Perform insulation detection and treatment on the motor, such as drying and replacing insulation materials; Replace the motor bearing.

Frequency converter fault

Fault manifestations: the frequency converter displays fault code, the output frequency is unstable, and the motor runs abnormally.

Cause analysis: parameter setting of frequency converter is wrong; Poor heat dissipation, resulting in overheating of the inverter; The grid voltage fluctuates greatly; Electronic components inside the frequency converter are damaged.

Solution: Re-check and set inverter parameters; Clean the cooling channel of frequency converter to ensure good heat dissipation; Install a voltage regulator to stabilize the grid voltage; Contact professional maintenance personnel to repair or replace the damaged components inside the inverter.

Control system failure

Sensor failure

Fault symptoms: sensor data such as temperature, pressure and speed are inaccurate or no signal output, which leads to misoperation or abnormal operation of the control system.

Cause analysis: the sensor is damaged, the sensor probe is dirty and blocked, and the signal transmission line is faulty.

Solution: Replace the damaged sensor; Clean the sensor probe to ensure its normal operation; Check the signal transmission line and repair or replace the damaged line.

Controller failure

Faults: The controller crashed, the program went wrong, and the normal control of the blower could not be realized, such as the failure of starting, stopping, speed regulation and other functions.

Cause analysis: controller hardware failure, such as circuit board damage, chip failure; Software program error or incompatible version; Electromagnetic interference affects the normal operation of the controller.

Solution: Check the hardware of the controller and replace the damaged circuit board or chip; Re-download or update the software program to ensure that the versions are compatible; Take electromagnetic shielding measures for the controller to eliminate interference sources.

Other faults

Air leakage fault

Fault manifestations: the system pressure drops, the air volume is insufficient, and obvious air leakage can be heard at pipeline joints, valves and other parts.

Cause analysis: poor sealing of pipeline connection parts, aging and damage of gaskets; The valve is not closed properly; The pipeline is broken or has sand holes.

Solution: Replace the aged and damaged gasket and re-tighten the pipeline connecting bolts; Repair or replace the valve; Repair or replace the broken or sand-holed pipeline.

Surge fault

Malfunction: The blower oscillates periodically, resulting in strong vibration and noise, which may damage the equipment in serious cases.

Cause analysis: the system flow is too small and enters the surge zone; The characteristics of the pipe network have changed, which does not match the performance of the blower.

Solution: increase the system flow to prevent the blower from running in the surge zone; Adjust the layout of the pipe network, optimize the system characteristics, make the blower match the performance of the pipe network, or install anti-surge devices.