Bidding for high-pressure three-blade roots blower, Thermal Power Generation Fan 5-51/6-51 -changhao

Describe

5-51, 6-51 type boiler supply and induction fans are suitable for the supply and induction fan system of 2t/h~670t/h steam boilers in thermal power plants, and can also meet the performance parameters of fluidized bed furnace high pressure head. This series of fans It can also be used for dust removal, mine ventilation and general ventilation systems.

The medium conveyed by the blower is air, and the medium conveyed by the induced draft fan is flue gas or gas containing impurity particles. If the concentration of impurities is less than 200mg/m3, it can be used for more than four years. If the concentration of impurities is large, it can also be used, but the service life is relatively shortened. The maximum operating temperature of the blower should not exceed 250°C

Advantage

1. The design of this series of fans is based on the aerodynamic sketches that have been finalized after more than one year of model tests and adopts the patented technology of “adjustable air inlet”; high-strength wear-resistant impellers, oil-leakage-proof bearing boxes, self-aligning axial adjustment door

A series of advanced proprietary technology achievements.

2. The range of high-efficiency working conditions is wide, and the machine numbers are arranged densely, so it is easy to select high-efficiency working conditions.

3. It has the patented technology of “adjustable air inlet”.

This patented technology adjusts to the ideal position when the fan is installed.

When the fan is running, if there is friction, the air inlet can be adjusted to an appropriate position.

When the fan is overhauled, the air inlet can be adjusted axially to disengage from the impeller, and the rotor can be lifted out vertically.

4. High-strength wear-resistant impeller

The impeller adopts near-warp and backward single-plate blades to reduce airflow impact, good stability, and the motor is not easy to be overloaded. It overcomes the shortcomings of the original airfoil-shaped hollow blades that enter the interior and cause vibration caused by dust in the non-working area. Easy to grind

The damaged parts are surfacing with special wear-resistant welding rods for fans, which greatly prolongs the service life of the fans. This type of fans has high pressure coefficient, low peripheral speed and low noise, so it has good practicability.

dust removal efficiency of not less than 85% must be installed to reduce the dust content of the flue gas entering the fan. Improve the service life of the fan.

Type and structure

Both the ventilator and the induced draft fan are single-suction, with seven machine numbers: №8, №9, №10, №11.2, N12.5, №14, №16. Each type of fan can be made into two types of right-handed or left-handed. When looking at the fan from one end of the motor, any impeller that rotates in a clockwise direction is called a right-handed fan, which is represented by “right”, otherwise it is a left-handed fan. “Left” means.

The outlet position of the fan is represented by the outlet angle of the casing, and the “right” and “left” fans can be made at 0°, 45°, and 90°. , 135°, 180°, 225°, a total of six angles. Please contact our factory when you require a special machine number or a special angle.

The transmission mode of the fan is D type, and the connection between the motor and the fan is directly driven by an elastic coupling.

The fan is mainly composed of impeller, casing, air inlet, regulating door and transmission group.

Impeller: It is made of 12 backward inclined airfoil blades welded between the arc cone wheel cover and the flat wheel disc. The impeller of the induced draft fan is generally 16Mn, and the joint between the blade and the wheel cover is lined with a wear-resistant guard plate. The head of the blade is made of a solid body, and wear-resistant materials are added to the wear-resistant part to increase the service life of the blade. Ventilators are different. The impellers have passed the static and dynamic balance correction and overspeed operation test, so the operation is stable and reliable.

Chassis: volute body welded by ordinary steel plate. The casing of the single-suction fan is made into two different types of №8~№12.5 casings to form an integral structure, and a quarter of the casings of №14 and №16 can be dismantled. For the induced draft fan, the volute plate has a dust removal door and is properly thickened to prevent soot from being worn.

Air inlet: Convergent streamlined overall structure, fixed on the inlet side of the casing with bolts.

Regulating door: used to adjust the size of the fan flow. №8 and №12.5 are composed of 11 petal-type blades, and Na14 and Ng16 are composed of 13 petal-type blades, all of which are axially installed in front of the air inlet. Due to the external transmission structure, the rotation is flexible and convenient, and the adjustment range is from 90°( fully closed) to 0° (fully open). Adjust the position of the door handle, it is on the right side when viewed from the direction of the air inlet. For right-handed fans, push the lever from bottom to top from fully closed to fully open; for left-handed fans, pull the lever from top to fully closed to fully open. In order to make all parts of the regulating door work normally, lubrication must be paid attention to. For the regulating door of the fan, it is lubricated with calcium-sodium-based grease; for the induced draft fan, due to the high temperature of the gas, it must be lubricated with molybdenum disulfide high-temperature (260°C) grease.

Transmission group: the transmission mode is D type. It is composed of main shaft, bearing box, coupling and so on. The main shaft is made of high-quality steel with rolling bearings and a water-cooled integral bearing box.