FRP Centrifugal Fan

1. Characteristics and Applications

High-pressure fiberglass centrifugal fans are generally used for high-pressure forced ventilation and are widely used to transport corrosive gases and other non-combustible gases. The gas should not contain sticky substances, and the dust content and hard particle size should not exceed 150mg/m3, with a gas temperature not exceeding 80°C.

2. Types

High-pressure centrifugal fans can be made in both right-handed and left-handed types. When viewed from the motor side, if the impeller rotates clockwise, it is called a right-handed fan, denoted by "R"; if the impeller rotates counterclockwise, it is called a left-handed fan, denoted by "L."

The outlet position of the fan is represented by the angle of the outlet of the casing. Both "L" and "R" can be made at 0°, 45°, 90°, 135°, and 180°, a total of six angles.

The transmission methods of the fan are type A (No. 4 to 6.3) and type D (No. 7.1 to 16).

3. Structural Features

No. 4 to 6.3 mainly consist of impellers, casings, inlet ports, etc., directly connected to the motor. No. 7.1 to 16 also include transmission parts.

(1) Impeller: The impeller is a steel-lined fiberglass structure, and the blades of the 9-26 type fans are of the forward-curved type. The maximum peripheral speed of the impeller expander does not exceed 140m/s. After forming, the impeller undergoes static and dynamic balance correction, with excellent air performance, high efficiency, and stable and reliable operation.

(2) Casing: The casing is a volute made of fiberglass. The casings of No. 2.8 to 12.5 are made as a whole and cannot be disassembled. The casings of No. 16 and No. 20 are made as a two-piece open type, divided into two halves along the median horizontal plane and connected by bolts.

(3) Inlet Port: The inlet port is made as a convergent streamlined integral structure, installed on the side of the fan. The cross-section parallel to the axis is curved, which enables the gas to smoothly enter the impeller with minimal loss.

(4) Transmission Assembly: The transmission part consists of a main shaft, bearing box, and coupling. The main shaft is made of high-quality steel. The bearing box has an integral structure using ball bearings, lubricated with bearing grease.