Purpose

9-19 and 9-26 high-pressure centrifugal fans are generally used for forging furnaces and high-pressure forced ventilation. They can also be widely used for conveying materials, air, and gases that are non-corrosive, non-combustible, non-explosive, non-volatile, and non-viscous. The medium temperature generally does not exceed 50℃ (higher temperature does not exceed 80℃), and the content of dust and hard particles in the medium is not more than 150mg/m³. ³。

Type

The fan is a single-suction type, usually with 13 models: 24, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2, 12.5, 14, and 16.

The fan is usually made in two types: right-rotating and left-rotating. Viewed from the motor end, the impeller rotates clockwise, which is called a right-rotating fan, indicated by "right"; counterclockwise rotation is called a left-rotating fan, indicated by "left".

The outlet position of the fan is indicated by the outlet angle of the casing. Both "left" and "right" can be made into six angles: 0°, 45°, 90°, 135°, 180°, and 225°. The transmission methods of the fan are divided into three types: A (4~6.3), D, and C (7.1~16).
If the above model numbers, rotation direction, outlet angle, and transmission method do not meet your needs, we have the ability to design a customized solution for you until you are satisfied.

Product Overview

The 9-19A high-pressure centrifugal fan is generally used for forging furnaces and high-pressure forced ventilation. It can be widely used for conveying materials, air, and non-corrosive, non-combustible, non-viscous gases. The medium temperature generally does not exceed 50℃ (higher temperature does not exceed 80℃). The content of dust and hard particles in the medium is not more than 150mg/m³. ³。

It can also be used for supplying fresh air in mine shafts and for mechanical equipment such as environmental protection dust removal, catalytic combustion, grain machinery, ceramic factories, steel plants, glass factories, rubber factories, steel pipe factories, spray painting factories, and the printing machinery manufacturing industry, with a wide range of applications.

Product Overview

The 9-19C high-pressure centrifugal fan uses belt transmission. The impeller is mounted on the drive shaft, which can withstand high temperatures. It is generally used for forging furnaces and high-pressure forced ventilation. It can be widely used for conveying materials, air, and non-corrosive, non-combustible, non-viscous gases, and is often used with catalytic combustion equipment and environmental protection machinery.

Performance Overview

Generally used for forging furnaces and high-pressure forced ventilation, and can be widely used for conveying materials, air, and non-corrosive, non-combustible, non-viscous gases. The medium temperature does not exceed 80℃, but high-temperature fans can also be manufactured according to user requirements. The content of dust and hard particles in the medium is not more than 150mg/m³.

Usage

9-19 and 9-26 high-pressure centrifugal fans are generally used for forging furnaces and high-pressure forced ventilation. They can also be widely used for conveying materials, air, and gases that are non-corrosive, non-combustible, non-explosive, non-volatile, and non-viscous. The medium temperature generally does not exceed 50℃ (higher temperature does not exceed 80℃), and the content of dust and hard particles in the medium is not more than 150mg/m³. ³。

Type

This fan is a single-suction type, usually with 13 models: No. 4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2, 12.5, 14, and 16.

This fan is usually made in two types: right-rotating and left-rotating. Viewed from the motor end, the impeller rotates clockwise, which is called a right-rotating fan, indicated by "right"; counterclockwise rotation is called a left-rotating fan, indicated by "left".

The outlet position of the fan is indicated by the outlet angle of the casing. Both "left" and "right" can be made into six angles: 0°, 45°, 90°, 135°, 180°, and 225°.

The transmission methods of the fan are divided into three types: A (No. 4~6.3), D, and C (7.1~16).

If the above model numbers, rotation direction, outlet angle, and transmission method do not meet your needs, we have the ability to design a customized solution for you until you are satisfied.

Structure

No. 4~6.3 mainly consists of an impeller, casing, inlet, and bracket; No. 7.1~16 mainly consists of an impeller, casing, inlet, and transmission assembly.

Impeller - The 9-19 fan has 12 blades, and the 9-26 fan has 16 blades, both of which are forward-curved. The peripheral speed of the impeller should not exceed 140m/s. After forming, the impeller undergoes static and dynamic balance correction and overspeed operation tests, so the operation is stable and reliable.
Casing - Welded from ordinary steel plates into a volute shape.
Inlet - Made into a convergent streamlined integral structure, fixed to the front cover with bolts.
Transmission assembly - 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, uses rolling bearings, and is lubricated with bearing grease.

Maintenance

① The fan and its system are not allowed to operate with faults.
② The fan should be kept and used by a designated person.
③ Regularly clean the dust, dirt, and other impurities inside the fan to prevent rust.
④ Fan maintenance must be carried out after power failure, and a designated person should monitor the main switch after power failure.
⑤ During fan maintenance and trial operation, children, irrelevant personnel, and people with mobility impairments are prohibited from watching.
⑥ During the trial operation of the fan, no one is allowed to stand within 10 meters of the fan inlet and outlet.
⑦ Before and after repairing the fan, the tools and other items should be checked to prevent them from being left in the fan and pipeline.
⑧ Except for lubricating oil, which should be replaced after each overhaul, lubricating oil should be replaced according to the actual situation under normal circumstances.

Faults and Causes

1. Severe fan vibration
① Misalignment between the fan shaft and motor shaft, belt pulley groove misalignment;
② Friction between the casing and impeller or between the inlet and impeller;
③ Insufficient or unstable foundation stiffness;
④ Loose impeller rivets or impeller deformation;
⑤ Loose fit between the impeller shaft hole and the shaft;
⑥ Loose connecting bolts between the casing, bearing housing and bracket;
⑦ Poor installation of the fan inlet and outlet pipes, leading to resonance;
⑧ Dust, dirt, blade wear, impeller deformation, shaft bending, etc., causing rotor imbalance.

2. Excessive bearing temperature rise
① Severe vibration of the bearing housing;
② Poor quality, deteriorated lubricant or containing dust, sand, dirt and other impurities or insufficient filling;
③ Excessive or insufficient tightening force of the connecting bolts between the bearing housing cover and seat;
④ Misalignment of the main shaft and rolling bearing, misalignment of the front and rear bearings;
⑤ Rolling bearing damage or main shaft bending.

3. Excessive motor current or temperature rise
① Inlet and outlet pipe valves not closed during startup;
② Low motor input voltage or single-phase power failure;
③ Affected by severe vibration of the bearing housing;
④ Main shaft speed exceeds rated value;
⑤ Viscous substances in the input gas;
⑥ Ambient temperature too low, proportion too large.

Scope of supply for single unit products

1 fan, 1 matching motor, 1 set of foundation bolts (N4~6.3, 4 sets, №7.1 and above 8 sets) 1 set of coupling (Na7.1~16).

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