R2E190-RA26-05 Centrifugal Fan Troubleshooting and Installation Points

R2E190-RA26-05 Centrifugal Fan may encounter various faults during use, and correct installation is also the key to ensure its normal operation. The following will introduce the troubleshooting methods and installation points of the fan.

1. Common faults and treatment

Fan cannot start

Fault cause

The fan cannot start due to many factors. From an electrical point of view, the power is not connected is one of the common reasons. This may be caused by fuse melting, switch failure or wire break. Motor failure may also cause the fan to fail to start, such as motor winding short circuit, break, or bearing stuck. In addition, problems with the fan's control circuit, such as relay damage, abnormal control signal, etc., will also cause the fan to fail to start normally.

Solution

For the problem of power failure, if the fuse is blown, the fuse of the same specification should be replaced; if the switch is faulty, the switch needs to be repaired or replaced; if the wire is broken, the break point should be found and repaired or replaced. For motor failure, if the winding is short-circuited or open-circuited, it is generally necessary for professionals to repair or replace the motor; if the bearing is stuck, you can try to clean and lubricate the bearing first. If the problem still exists, you need to replace the bearing. For control circuit problems, check the relay, control signal circuit, etc., and repair or replace the damaged components.

Insufficient air volume

Cause of failure

Insufficient air volume may be caused by blockage of the ventilation duct, damage to the impeller, insufficient motor speed, etc. The blockage of the ventilation duct may be due to the accumulation of a large amount of dust, debris, etc. in the duct, which hinders the circulation of air. Impeller damage may be caused by wear and deformation caused by long-term use, or by external force impact. Insufficient motor speed may be caused by low power supply voltage, motor winding failure, etc.

Solution

For the problem of blocked ventilation ducts, it is necessary to clean the ventilation ducts to remove dust and debris in the ducts. You can use tools such as vacuum cleaners and compressed air for cleaning. If the impeller is damaged, you need to replace it with a new impeller. When replacing the impeller, pay attention to choosing a product with the same specifications as the original impeller and ensure that it is installed correctly. For the problem of insufficient motor speed, if the power supply voltage is too low, the power supply voltage should be checked and adjusted; if the motor winding is faulty, the motor needs to be repaired or replaced.

Excessive vibration

Cause of failure

Excessive vibration of the fan may be caused by unbalanced impeller, damaged bearings, loose installation, etc. Impeller imbalance may be caused by uneven dust accumulation on the impeller surface, impeller damage, or no balance correction during installation. Bearing damage may be caused by poor lubrication, overload operation, or severe wear caused by long-term use. Unsecured installation may be caused by loose mounting brackets of the fan, insufficient tightening torque of bolts, etc.

Solution

For the problem of unbalanced impeller, the impeller can be cleaned and balanced. Clean the dust on the surface of the impeller to distribute it evenly. If the impeller is damaged, a new impeller needs to be replaced and balanced. For the problem of bearing damage, the bearing should be replaced in time, and ensure that it is installed correctly and lubricated well. For the problem of loose installation, check the mounting bracket and bolts, tighten the loose bolts, and ensure that the fan is firmly installed.

Abnormal noise

Cause of failure

Abnormal noise may be caused by friction and collision of internal components of the fan, or unreasonable design of the air duct. Friction and collision of internal components of the fan may be caused by too small a gap between the impeller and the housing, bearing damage, loose bolts, etc. Unreasonable design of the air duct may be caused by too many turns in the air duct, too small cross-sectional area of ​​the air duct, etc., resulting in poor air flow and noise.

Solution

For the problem of friction and collision of internal components of the fan, check the gap between the impeller and the housing and adjust it to the appropriate range; replace damaged bearings; tighten loose bolts. For the problem of unreasonable design of the air duct, it is necessary to modify the air duct, reduce the turns of the air duct, increase the cross-sectional area of ​​the air duct, and make the air flow smoother.

2. Installation points

Selection of installation location

Space requirements

When selecting the installation location, ensure that there is enough space. A certain amount of space should be reserved around the fan to facilitate daily inspection, maintenance and repair work. Generally speaking, at least 300 mm of space should be reserved around the fan. At the same time, the location of the fan's air inlet and outlet should be considered to avoid obstacles blocking the air inlet and outlet, which will affect the air circulation. For example, do not install the fan in narrow places such as corners to avoid obstructing the air in and out.

Environmental requirements

The installation location should be selected in a dry and well-ventilated place, and avoid installation in a humid, corrosive gas or dusty environment. If installation in a harsh environment cannot be avoided, appropriate protective measures should be taken, such as installing a protective cover and using corrosion-resistant materials. In addition, stay away from flammable and explosive items to ensure the safety of the installation environment. For example, when installing a fan in a chemical workshop, ensure that the fan is kept at a safe distance from flammable and explosive chemicals.

Foundation installation

Foundation production

It is very important to make a solid foundation for the fan. The foundation can be made of concrete or steel structure. The size and strength of the foundation should be designed according to the weight and operating requirements of the fan. When making the foundation, ensure that the foundation surface is flat and the horizontal error should be controlled within a small range, generally not exceeding ±1 mm/m. For example, if the foundation is not flat, the fan may vibrate during operation, affecting its performance and service life.

Fan installation

When installing the fan on the foundation, use appropriate bolts and gaskets to ensure a firm connection between the fan and the foundation. The tightening torque of the bolts should meet the specified requirements to avoid fan vibration caused by loose bolts. At the same time, the horizontality of the fan should be ensured, and a level should be used to measure and adjust the fan so that it is in a horizontal state.

Ventilation duct connection

Connection method

The connection between the ventilation duct and the fan should be tight and sealed. Flange connection, welding and other methods can be used for connection. During the connection process, ensure that the center line of the duct is aligned with the center line of the air inlet or outlet of the fan to avoid deviation. At the same time, use sealant or sealing gaskets to seal the connection parts to prevent air leakage.

Pipeline layout

The layout of the ventilation duct should minimize turns and diameter changes to reduce the resistance to air flow. If turns are required, a larger turning radius should be used to avoid right-angle turns. The cross-sectional area of ​​the duct should be reasonably designed according to the air volume and pressure requirements of the fan to ensure that the air can pass through the duct smoothly.

By correctly handling common fan failures and following installation points, the normal operation of the R2E190-RA26-05 centrifugal fan can be guaranteed to achieve its best performance.