1. Common faults and solutions of high-pressure fans
During the use of high-pressure fans, some faults sometimes occur, which need to be checked and repaired in time to be used normally. Let us briefly introduce the common failure causes and treatment methods of high-pressure fans:
1. The fan does not rotate
(1) The cause of the failure: the power supply is not connected . Solution: Turn on the power.
(2) Fault reason: the motor does not work. Solution: Check the motor wiring or replace the motor.
(3) Cause of failure: the blower head is damaged. Treatment method: Repair the fan or replace it.
(4) Cause of failure: There is a foreign object stuck in the fan. Treatment method: Turn off the fan and remove the foreign matter inside.
2. Increased noise
(1) The cause of the failure: the bearing is dry lubricated. Treatment method: add bearing grease.
(2) Cause of failure: bearing damage. Treatment method: replace the bearing.
(3) Cause of failure: impeller wear. Treatment method: replace the impeller or pump head.
(4) The reason for the failure: the solid parts are loose or fall off. Treatment method: Tighten the fasteners.
(5) Cause of failure: There is a foreign body in the fan. Treatment method: remove foreign objects or replace the pump head.
3. Increased vibration
(1) Cause of failure: bearing damage. Treatment method: replace the bearing.
(2) The cause of the failure: the impeller is unbalanced. Treatment method: remove foreign objects in the impeller or correct the dynamic and static balance.
(3) The cause of the failure: the spindle is deformed. Treatment method: replace the main shaft or pump head.
(4) Cause of failure: The working state enters the turbulent area. Treatment method: adjust the working state to avoid the turbulent area.
(5) The cause of the failure: the inlet and outlet filters are blocked. Treatment method: Clean the filter screen.
4. The temperature rises
(1) The reason for the failure: the temperature of the air inlet is too high. Treatment method: reduce the air inlet temperature.
(2) The cause of the failure: the bearing is dry lubricated. Treatment method: add bearing grease.
(3) Cause of failure: The efficiency of the fan is reduced. Treatment method: remove the dust in the blade passage or replace the pump head.
(4) Cause of failure: The working state has changed. Processing method: adjust the working status.
(5) The cause of the failure: the ambient temperature increases. Treatment method: increase environmental ventilation and heat dissipation.
5. Pressure reduction
(1) Cause of failure: The speed of the pump head is reduced. Treatment method: The power supply voltage is low or the motor is faulty.
(2) Cause of failure: increased resistance of the pipe network. Treatment method: reduce the resistance of the pipe network.
(3) Cause of failure: The working state has changed. Processing method: adjust the working status.
(4) The cause of the failure: the direction of the motor is reversed. Solution: Rewire the motor.
6. Flow reduction
(1) Cause of failure: The inlet and outlet air filters are blocked. Treatment method: Clean the filter screen.
(2) The cause of the failure: the speed of the pump head is reduced. Treatment method: The power supply voltage is low or the motor is faulty.
(3) Cause of failure: increased resistance of the pipe network. Treatment method: reduce the resistance of the pipe network.
(4) Failure reason: the working state increases. Processing method: adjust the working status.
(5) The cause of the failure: the direction of the motor is reversed. Solution: Rewire the motor.
7. Insufficient wind pressure
(1) Cause of failure: insufficient power grid voltage and frequency, which reduces the motor speed. Treatment method: adjust the grid voltage.
(2) Cause of failure: large loss of pipeline and air leakage. Treatment method: replace the pipe, the pipe should not be too long, the pipe diameter should be greater than or equal to 1.1 times the diameter of the fan outlet, the elbow should not be too many, the elbow angle should be <90°, and R should be as large as possible.
(3) The cause of the failure: the air supply object is blocked or leaked. Treatment method: Check whether the air supply object is blocked or leaked.
(4) Cause of failure: too much leakage in the fan. Treatment method: replace the seal.
Second, how to maintain and maintain the high-pressure blower
Except for the impeller, the high-pressure blower basically has no other rotating parts, and the impeller is directly connected to the motor, without gear or Driven by the drive belt, so it has high reliability and is almost maintenance-free. However, during use, paying attention to maintenance can not only improve performance, but also prolong service life. The main attention for the maintenance of the high-pressure fan:
1. The motor of the high-pressure fan is directly connected to the impeller and has a high speed. The bearing needs to be regularly added with butter to prevent the bearing from being damaged (including the bearing of the impeller).
2. In order to prevent the long-term extreme high pressure (vacuum) from causing the shaft power to increase and the motor to be overloaded, the pressure relief valve is often used, which is an unloading valve. When the high-pressure fan is used After the pressure exceeds the pressure set by the pressure relief valve, the pressure relief valve will automatically open to release the excess pressure, thereby protecting the motor of the high-pressure fan.
3. The internal mechanism of the high-pressure fan is relatively tight, and the gap between the impeller and the casing is small, so it is necessary to filter debris and dust. For sundries, a fine filter is usually installed at the air inlet, and a filter is often used for dust. According to different use sites, filter elements with different filtration precisions are often used, and different filter elements have different maintenance methods and service lives.
4. In some special occasions, special protection is also required: for example, when using in a sealed environment, pay attention to ventilation and heat dissipation; when the ambient temperature (when the intake air temperature is relatively high), more Pay attention to ventilation and heat dissipation, or choose a high-pressure fan that allows a higher inlet air temperature.
