Parameters of High Pressure Centrifugal Fans Series 9-19 and 9-26

Specification: 9-19 NO 4A 4.5A 5.5A 5.6A 6.3A 7.1D 8D 9D 10D 11.2D 12.5D 11D 16D
Flow rate: 0.23-17.58 m³/s
Full pressure: 2705-15425 Pa

Specification: 9-26 NO 4A 4.5A 5.5A 5.6A 6.3A 7.1D 8D 9D 10D 11.2D 12.5D 11D 16D 19.5D
Flow rate: 0.61-40.98 m³/s
Full pressure: 3407-16250 Pa

High pressure centrifugal fans series 9-19 and 9-26purpose

High pressure centrifugal fans series 9-19 and 9-26It is generally used for high-pressure forced ventilation in industries such as forging furnaces, glass, electroplating, ceramics, livestock batteries, and radio. It can also be widely used for material transportation in processing industries such as grain, feed, and mineral powder. It is also suitable for supporting use in cardboard machinery equipment, tempered glass equipment, and other related fields. The medium being transported is air and other non self igniting, harmless, and non corrosive gases, and no viscous substances are allowed in the gas. Generally, the temperature used for ventilation should not exceed 80 ℃, and the dust and hard particles contained should not exceedGreater than or equal to 150mg/m3.

Construction

High pressure centrifugal fans series 9-19 and 9-26Composed of a casing, spindle, impeller, bearing transmission mechanism, and motor.

Chassis: Made of steel plate, it is sturdy and reliable, and can be divided into integral and semi open types. The semi open type is easy to maintain.

Impeller: composed of blades, curved front plate, and flat rear plate.

Rotor: It should undergo static and dynamic balancing to ensure smooth rotation and good performance.

Transmission part: composed of main shaft, bearing box, rolling bearings, and pulley (or coupling)

Installation matters

1. The installation of the centrifugal fan unit as a whole should be directly placed on the foundation and leveled with paired diagonal pads.

2. The cutting surface on the base of the centrifugal fan assembled on site should be properly protected and should not be corroded or operated. When the base is placed on the foundation, paired diagonal pads should be used to level it.

3. The bearing seat and base should be tightly connected, and the longitudinal non levelness should not exceed 0.2/1000. The horizontal non levelness should not exceed 0.3/1000 when measured on the main shaft with a spirit level. The horizontal non levelness should not exceed 0.3/1000 when measured on the horizontal split of the bearing seat with a spirit level.

4. Before grinding and scraping the bearing shell, the rotor axis line and the casing axis line should be calibrated, and the gap between the impeller and the air inlet, as well as the gap between the main shaft and the rear plate shaft hole of the casing, should be adjusted to comply with the technical specifications of the equipment.

5. When assembling the main shaft and bearing, inspection should be carried out according to the technical specifications of the equipment. The interference fit between the bearing cover and the bearing shell should be maintained at 0.03-0.04 millimeters (measure the outer diameter of the bearing shell and the inner diameter of the bearing seat).

6. When assembling the fan casing, the position of the casing should be aligned based on the rotor axis line, and the axial and radial clearances between the impeller inlet and the casing inlet should be adjusted to the range specified in the equipment technical documents at high speed. At the same time, the anchor bolts should be checked for tightness. When the clearance value is not specified in the equipment technical documents, the axial clearance should generally be 1/100 of the outer diameter of the impeller, and the radial clearance should be evenly distributed, with a value of 1.5/1000 to 3/1000 of the outer diameter of the impeller (the smaller outer diameter is taken as the larger value). When adjusting, strive for a smaller gap value to improve the efficiency of the fan.

7. When aligning the fan, the different axial degrees between the fan shaft and the motor shaft should not exceed 0.05 millimeters for radial positioning and 0.2 millimeters for inclination.

8. The centrifugal fan assembled with rolling bearings has different axial degrees of the bearing holes on the two bearing frames, which can be determined by the flexibility of rotation after the rotor is installed.