Negative pressure fans believe that everyone has heard of it, it is the main cooling equipment in many factories, workshops, farms and other places. How to identify the performance of the negative pressure fan? And the mechanical equipment will inevitably produce a certain noise during the use of the process, how to solve the noise of the negative pressure fan? Today we will look at it together.

How to identify the performance of negative pressure fans?

1. To ensure dynamic balance. As we all know, dynamic balance is the basis for ensuring the effective operation of negative pressure fans. The negative pressure fan with good quality and excellent quality has low vibration and low noise during operation, which can greatly improve the working efficiency of the negative pressure fan.

2. In the treatment of noise, the enterprise can judge the noise by changing the sound during the working process of the negative pressure fan.

3. When observing the air volume of the negative pressure fan, it can be judged by observing the condition of the blade of the front louver during operation and the wind pressure when the negative pressure fan is working.

4. Determine whether the negative pressure fan meets the technical requirements by measuring the current.

How to solve the noise of the negative pressure fan?

1. When the negative pressure fan is installed, the contact with the window frame is too tight, so that the window frame resonance occurs when the negative pressure fan is running.

Solution: Reduce the packing between the window frame and the water air conditioner properly, and use a softer material to fill it. If the bottom of the installation is not stable, the bottom plate should be stabilized and placed securely and securely.

2. The negative pressure fan is not properly installed. The installation of the negative pressure fan should be in a suspended state. The spring of the foot bolt cannot be crushed.

Solution: Ask the maintenance personnel to adjust the installation status of the negative pressure fan to make it in suspension.

3. The anti-vibration pad or fixing screw of the negative pressure fan base is screwed too tightly, and the vibration-absorbing effect is lost.

Solution: Adjust the screw tightness of the damping pad of the negative pressure fan base to make the base surface smooth.

4. The power supply voltage is too low. When the negative pressure fan starts or runs, abnormal noise and vibration are generated.

Solution: Control the power supply voltage within the rated voltage range. A voltage regulator or power regulator can usually be used to stabilize the voltage.

5. The negative pressure fan blades collide with the fan casing (cover).

Solution: Reasons for adjusting the blade: The fan motor of the negative pressure fan is poorly driven, the screw of the axial fan is loose, the blade is not fixed on the shaft, and the gap between the top of the blade and the hood is too small. Solution: Replace the negative pressure fan motor bearing to tighten the screws on the axial fan base and the shaft. According to the production technical requirements, the distance between the tip of the blade and the casing is generally not more than 1.5% of the length of the blade.

6. The base screw of the negative pressure fan is loose, the impeller is poorly assembled, the rotation speed is too fast, the fixed screws on the shaft are loose, etc.

Solution: Fasten the fan base of the negative pressure fan and the screws on the shaft. Reassemble and adjust the impeller clearance according to technical requirements

The above is the identification method of the performance of the negative pressure fan and the solution of the noise, I hope to be helpful to everyone.